Patent Publication Number: US-2020276059-A1

Title: Absorbent article with channels and method for manufacturing thereof

Description:
TECHNICAL FIELD 
     The present invention pertains to the technical field of absorbent articles, more preferably disposable personal care articles such as diapers, baby pants, adult incontinent garments, and the like, and to absorbent structures for use in such absorbent articles. More specifically the present invention relates to an absorbent structure comprising an absorbent core between a topsheet and a backsheet. The present invention also relates to a method and apparatus for manufacturing such an absorbent article. 
     BACKGROUND 
     Absorbent articles such as diapers, baby pants, adult incontinent garments and the like, typically comprise an absorbent core, positioned in between a liquid permeable or pervious, hydrophilic or semi hydrophilic topsheet and a liquid impermeable or impervious backsheet. The absorbent core comprises absorbent material that is able to absorb fluid and liquid bodily excretions of the user of the absorbent article. 
     The absorbent material of the absorbent core may be an absorbent particulate polymer material which is dispersed in a matrix of cellulose fibers or fluff pulp in order to prevent the particulate material from aggregating, as well as to prevent gel blocking. Gel blocking can occur when the absorbent particulate polymer material absorbs liquid, as they tend to typically swell and form a gel structure. This gel structure often blocks the further transfer of liquid into the remaining absorbent core. As a result, the liquid may be unable to reach the remaining absorbent particulate polymer material and the efficiency of the overall absorbent article decreases significantly. Existing fluff pulp materials are not suited to cope with rapid, subsequent insults of fluid since they possess limited distribution capacities. Moreover existing fluff pulp materials exhibit a limited capacity of overall liquid intake. Furthermore, existing absorbent cores containing fluff pulp have a limited wet integrity, which leads to the shape and fit of the absorbent article being deformed when e.g. an absorbent article is being worn by a baby which moves around. 
     In recent years, there has been a strong demand for more flexible, thinner, light-weight, absorbent articles to resolve various problems associated with manufacturing, marketing, design, fit, wearing comfort, distribution, garbage disposal, material and energy consumption, transport and storage costs and the like. This lead to the search for and the development and production of absorbent articles of which the absorbent cores contains little to no cellulose fibers or fluff pulp, as the latter tend to be quite bulky, thus rendering generally more thick absorbent cores which reduces the overall wearing comfort of the user of the absorbent article. 
     Hence, various absorbent cores containing little to no cellulose fibers or fluff pulp were developed in the past few years to try and overcome the above drawbacks, whereby the relative high amounts of absorbent polymer materials necessary to replace the absorption, distribution and retention capacity of the excluded cellulose fibers and/or fluff pulp were loaded, distributed and immobilized within these new absorbent cores according to several techniques. However given the ability and capacity of the absorbent core to absorb, transport and retain fluid and liquids is heavily dependent upon the form, position and/or manner wherein these absorbent polymer materials are incorporated within the absorbent core several drawback remained unsolved. In general the substantially heterogeneously distributed absorbent cores having non-continuous compartments and/or clusters of absorbent polymer material have in general proven to be better in coping with the above mentioned problems, nevertheless they also proved to remain unsatisfactory within most of the available absorbent articles. Especially problematic however, were the substantially homogenously distributed absorbent structures having continuous layers of absorbent polymer particulate material given they exhibit a substantially homogenous swollen absorbent polymer material area for second, third and next liquid insults wherein the dry and/or wetted absorbent polymer material layer may actually act as a liquid barrier. These problems and complications are especially prevalent within very flexible, thin, lightweight absorbent structures wherein high amounts of absorbent polymer material are distributed within the absorbent core of the absorbent article. Adding even more, thicker and larger overlying acquisition and dispersing layers did not at all resolve the above cited absorption, distribution and retention problems and moreover made the absorbent articles commercially unviable, environmentally unsustainable and more difficult to manufacture, store and transport. 
     Furthermore an existing problem which has been associated with such absorbent cores containing no or little cellulose fibers or fluff pulp is related to the migration, loss and leakage of the absorbent particulate polymer material from the absorbent article during dry and/or wet state, which leads to irritation, skin problems and overall discomfort for the user. This again is also especially true in the more homogenously distributed absorbent structures given their immobilization and liquid distribution properties remain unsatisfactory to date. This lack of effective and efficient immobilization and liquid distribution lead to dysfunctional absorbent articles due to lowered uptake capacity, gel blocking, enhanced rewet values, leakages and the creation of ruptures and/or pinholes through the liquid pervious topsheet and/or liquid impervious backsheet of such absorbent articles. 
     Absorbent cores generally have a high absorbent capacity and the absorbent core may expand several times its weight and volume. These increases may cause the absorbent article to deform and/or to sag in the crotch region as they become saturated with liquid. This may cause leaks to occur via a longitudinal and/or transversal edge of the absorbent article. 
     SUMMARY 
     The object of embodiments of the invention is to provide an absorbent article of the type stated in the preamble, with improved liquid distribution and absorption capacities. 
     According to a first aspect of the invention there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet. Said absorbent core is positioned in between said topsheet and said backsheet, and the absorbent core is provided with at least one attachment zone between the top core wrap sheet and the back core wrap sheet. A first binder is arranged in a first area between the top core wrap sheet and the back core wrap sheet at a distance from the at least one attachment zone, on one of the top core wrap sheet and the back core wrap sheet, and a second binder is arranged in a second area between the top core wrap sheet and the back core wrap sheet, on the other of the top core wrap sheet and the back core wrap sheet. 
     Embodiments are based inter alia on the inventive insight that, by providing at least one attachment zone in the absorbent core, a corresponding at least one liquid distribution zone is created in the absorbent core upon wetting such that liquid can be distributed and absorbed in an improved manner. Indeed, liquid can flow in the plurality of attachment zones and can be absorbed by the absorbent core through the side walls of the plurality of attachment zones, in addition to liquid being absorbed through the top surface of the absorbent core. Advantageously, as will be discussed later on, the at least one attachment zone is embodied as a plurality of channels. 
     In a preferred embodiment, the first area is substantially complementary to the second area. The second area preferably includes the at least one attachment zone. 
     The first binder may be different from the second binder, or may be the same as the second binder, wherein a transition zone may be distinguishable between the first area and the second area. The first binder may, additionally or alternatively, be arranged as a layer having a first thickness and the second binder may then be arranged as a layer having a second thickness which is different from the first thickness, preferably higher than the first thickness. 
     The attachment between the top core wrap sheet and the back core wrap sheet in the at least one attachment zone may be a permanent attachment; in which case the absorbent core is configured such that, in a wetted state of the absorbent material, the absorbent material extends over the at least one attachment zone. Alternately, in said at least one attachment zone said top core wrap sheet may be attached to said back core wrap sheet through a semi-permanent attachment configured to release after having been in contact with liquid. 
     A position and/or shape of one or more attachment zones of the at least one attachment zone may be indicated by means of a distinguishable color and/or colored pattern. The distinguishable color and/or colored pattern may be provided on at least one of the topsheet, the top core wrap sheet, the backsheet and the back core wrap sheet. Alternately or additionally, the position and/or shape of one or more of the plurality of attachment zones may be indicated by means of a printed ink layer. 
     Outside of the at least one attachment zone the absorbent core may have a maximum thickness, wherein the at least one attachment zone extends through at least 90% of the maximum thickness of the absorbent core, more preferably through 100% of the thickness of the absorbent core, such that in the at least one attachment zone substantially no absorbent material is present between the top core wrap sheet and the back core wrap sheet. 
     The attachment between the top core wrap sheet and the back core wrap sheet may be any one of the following or a combination thereof: pressure bonding, thermal bonding, sonic bonding, chemical bonding, adhesive. 
     The absorbent material may comprise cellulosic fluff pulp, or may be substantially fluffless. In the at least one attachment zone, preferably substantially no absorbent material is present. 
     In a second aspect of the invention, there is provided a method for manufacturing an absorbent article, said method comprising: applying a first binder in a first area on a first side of first sheet material; applying a second binder in a second area on a first side of second sheet material; applying an absorbent material on the first side of the first sheet material; attaching the first sheet material to the second sheet material with the first sides facing each other, such that at least one attachment zone is formed. In this method, one of the first sheet material and the second sheet material is a top core wrap sheet material and the other is a back core wrap sheet material; and the first area is arranged at a distance from the intended position of the at least one attachment zone. 
     Embodiments are based inter alea on the inventive insight that the attachment between the top core wrap sheet and the back core wrap sheet should be sufficiently strong, especially in cases where a significant amount of liquid is absorbed. Therefore, it may be desirable to additionally use a binder, such as glue, to strengthen the bond between the top and back core wrap sheets. 
     Furthermore, it is based on the inventive insight that it is not desirable to apply this binder to the entire surface area of one of the wrap sheets, since this may lead to the absorbent material and/or binder contaminating the at least one attachments zone, and therefore hindering the formation of at least one liquid distribution zone. By applying a first binder in areas of a wrap sheet substantially where absorbent material should be present, and applying a second binder on the other wrap sheet substantially where absorbent material should not be present, contamination can be prevented. 
     Preferably, the first area and the second area are substantially complementary after the step of attaching the wrap sheets to each other. Also preferably, substantially the entire surface of the absorbent article is provided with binder on either the first sheet material or the second sheet material. 
     The method may further include guiding the first and/or second sheet material along a rotating member while the first and/or second binder is applied. The attaching may be performed by applying pressure and heat on the top core wrap sheet material and/or the back core wrap sheet material in the area(s) where substantially no absorbent material is present. Additionally or alternately, the attaching is performed by a rotating 
     The binder applied on at least one portion of the first sheet material may be different from, preferably less strong than, the binder applied on the at least one portion of the second sheet material. Additionally or alternately, the binder may be applied on at least one portion of the first sheet material as a first layer having a first thickness, and on the at least one portion of the second sheet material as a second layer having a second thickness which is different from, preferably higher than, the first thickness. 
     According to a third aspect of the invention, there is provided an absorbent article manufactured according to the above-described method. 
     According to a fourth aspect of the invention, there is provided an apparatus for manufacturing an absorbent article, said apparatus comprising a first rotating member for guiding a first sheet material along a surface thereof, a first means for applying a first binder to at least one portion of the first sheet material, a second rotating member for guiding a second sheet material along a surface thereof, a second means for applying a second binder to at least one portion of the second sheet material, an application unit configured for applying an absorbent material on said first sheet material on the rotating member such that the at least one portion on which the first binder has been applied is covered with absorbent material and substantially no absorbent material is present on areas in which the first binder was not applied; a sheet feed unit configured for applying the second sheet material on top of the absorbent material on the first sheet material, wherein one of said first and second sheet material is a top core wrap sheet material, and the other one is a back core wrap sheet material; and an attachment unit configured for attaching said first sheet material to said second sheet material at least in the areas where substantially no absorbent material is present, wherein the at least one portion of the first sheet material on which the first binder is applied is arranged at a distance from the intended position of at least one attachment zone. 
     The portion of the first sheet material to which the first binder is applied and the portion of the second sheet material to which the second binder is applied are preferably substantially complementary in the resulting absorbent article. 
     The attaching unit may be a rotating member which is provided with at least a first sealing element dimensioned for applying pressure and heat on the top core wrap sheet material and/or the back core wrap sheet material in the area where substantially no absorbent material is present in order to create the at least one attachment zone. The first binder may be different from the second binder. Additionally or alternately, the first means may be configured to apply the first binder with a first thickness and the second means is configured to apply the second binder with a second thickness which is different from the first thickness, preferably higher than the first thickness. 
     In preferred embodiments, the at least one attachment zone is embodied as a plurality of substantially longitudinal sections, such that wetting of the absorbent material leads to the creation of a first and second channel at the first and second attachment zone, respectively. These embodiments will be described in more detail below. 
     In a first preferred embodiment of the invention, there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet, said absorbent core being positioned in between said topsheet and said backsheet. The absorbent core has a first and second longitudinal edge and a first and second transverse edge. The absorbent core is provided with a plurality of attachment zones comprising at least a first and a second attachment zone, said first and second attachment zone extending next to each other from a crotch region in the direction of the first and/or second transverse edge. In the first and second attachment zone any one of the following conditions is fulfilled: the top core wrap sheet is attached to said back core wrap sheet along an attachment which extends, seen in a transverse direction of the absorbent core, over a transverse distance which is at least 1 mm, preferably at least 2 mm, more preferably at least 3 mm, and most preferably at least 4 mm; the top core wrap sheet is attached to said back core wrap sheet along a discontinuous attachment at a plurality of locations at a distance of each other, seen in the transverse direction of the absorbent core, preferably over a transverse distance which is at least 1 mm, preferably at least 2 mm, more preferably at least 3 mm, and most preferably at least 4 mm. Upon wetting of the absorbent material of the absorbent article, any one of the above described conditions leads to the creation of a first and second channel at the first and second attachment zone, respectively. 
     Because the first and second attachment zones extend in the direction of the first and/or second transverse edge as do the created first and second channel, liquid can be distributed adequately. Both the plurality of attachments zones, before swelling of the absorbent material, and the plurality of created channels, during and after swelling of the absorbent material, allow for a more rapid distribution of liquid, especially towards the transverse edges of the absorbent core. In addition to a fast and adequate distribution of liquid in the longitudinal direction, the presence of the plurality of attachment zones and/or the creation of the corresponding plurality of channels leads to a more rapid and efficient distribution of liquid in both the transverse direction of the absorbent core and in the depth direction of the absorbent core. Furthermore, overall liquid intake by the absorbent core is faster as a result. By giving the attachment zones a sufficient width, depth and/or length a quantity of liquid can be held temporarily whilst the absorption takes place. Because the liquid is distributed quickly, this effect is established not only during a first liquid insult, but also during an eventual second liquid insult, a third liquid insult and a fourth liquid insult. Further, the first and second attachment zones allow the absorbent core to swell in the shape of a tub while the first and second channels are formed. Indeed, a portion of the absorbent core between the first longitudinal edge and the first attachment zone will be allowed to rotate inward and upward and a portion of the absorbent core between the second longitudinal edge and the second attachment zone will be allowed to rotate inward and upward, which is made possible thanks to the sufficiently wide first and second attachment zone. 
     Preferably, the first attachment zone and the attachment zone are substantially parallel and extend in a longitudinal direction of the absorbent core. In an alternative embodiment an angle between the first attachment zone and a longitudinal direction of the absorbent core and an angle between the second attachment zone and the longitudinal direction of the absorbent core is smaller than 5°. In that manner appropriate first and second channels and an appropriate tub-shape of the absorbent product can be obtained upon wetting of the absorbent material. 
     In an exemplary embodiment, the attachment between the top core wrap sheet and the back core wrap sheet in the first and the second attachment zone is a permanent attachment, and the absorbent core is configured such that, in a wetted state of the absorbent material, the absorbent material extends over the first and second attachment zone. In that matter, the absorbent material bulges over the first and second attachment zone, thereby causing a tension in the absorbent core which causes the absorbent core, which is in a substantially flat state when dry, to curl up to form a tub shaped and/or cup shaped absorbent core including the first and second channel. 
     Preferably, the plurality of attachment zones cover together at least 30%, preferably at least 40%, preferably at least 50%, more preferably at least 60%, more preferably at least 70%, more preferably 80% and more preferably at least 90% of a total length of the absorbent core. The covered length may be realized with the first and second attachment zone alone, or with a combination of a first and second attachment zone and one or more additional attachment zones. For example, first and second adjacent longitudinal attachment zones together with third and fourth adjacent longitudinal attachment zones may extend over at least 30%, preferably at least 40%, preferably at least 50%, more preferably at least 60%, more preferably at least 70%, more preferably 80% and more preferably at least 90% of a total length of the absorbent core. This will allow a good distribution over the entire absorbent core as well as a good formation of the channels and the tub-shape upon swelling of the absorbent core. 
     According to a second preferred embodiment, there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet, said absorbent core being positioned in between said topsheet and said backsheet. The absorbent core has a first and second longitudinal edge and a first and second transverse edge. The absorbent core is provided with a plurality of attachment zones comprising at least a first and a second attachment zone, said first and second attachment zone each extending from a crotch region in the direction of the first and/or second transverse edge. Preferably, the first channel is arranged adjacent to the second channel, seen in a transverse direction of the absorbent core. In the first and second attachment zone the top core wrap sheet is attached to the back core wrap sheet through a semi-permanent attachment configured to release after having been in contact with liquid. 
     Embodiments are based inter alia on the inventive insight that, by providing a plurality of attachment zones in the absorbent core, in combination with semi-permanent attachments, the absorbent core can swell in an improved manner, resulting in an improved liquid absorption. Indeed, when liquid flows in the attachments zones, the attachments are released and the absorbent core can “fill” or “overlap” the attachment zones and/or channels, wherein a portion of the absorbent core between the first longitudinal edge and the first channel will be allowed to rotate inward and upward and a portion of the absorbent core between the second longitudinal edge and the second channel will be allowed to rotate inward and upward, which is made possible thanks to the first and second channel and the swelling underneath the released top core wrap sheet. 
     In an exemplary embodiment of the second preferred embodiment, the top core wrap sheet is attached to the back core wrap sheet along a continuous or discontinuous attachment which extends, seen in a transverse direction of the absorbent core, over a transverse distance which is at least 1 mm, preferably at least 2 mm, more preferably at least 3 mm, and most preferably at least 4 mm. 
     In an exemplary embodiment of the second preferred embodiment, the semi-permanent attachment is configured to release after having been in contact with urine for a period of time, e.g. a period of time is smaller than 30 s. 
     In a third preferred embodiment, there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet, said absorbent core being positioned in between said topsheet and said backsheet. The absorbent core has a first and second longitudinal edge and a first and second transverse edge. The absorbent core is provided with a plurality of attachment zones comprising at least a first and a second attachment zone located a distance of each other, said first and second attachment zone each extending from a crotch region in the direction of the first and/or second transverse edge. A position and/or shape of one or more attachment zones of the plurality of attachment zone is indicated by means of a distinguishable color and/or colored pattern. 
     Such embodiments have the advantage that, on the one hand the attachment zones result in an improved liquid distribution and absorption of the liquid, and on the other hand, the color and/or pattern allows a user to easily distinguish a front and a rear portion of the absorbent article. Indeed, by giving e.g. the first attachment zone a color and/or pattern which is different from the color and/or pattern of the second attachment zone, a user can remember easily e.g. which color has to be on the left or right side. The person skilled in the art understands that many color and/or pattern variants are possible which will allow a user to easily recognize a front and a rear portion. In addition to or alternative to allow a user to easily recognize the correct orientation of the absorbent article, the color and/or pattern which indicate the position and/or shape of the attachment zones may be utilized to provide more information to a user about the absorbent article by linking a particular color and/or pattern of the visual indication to a certain characteristic of the absorbent article such as size, type (e.g. diaper versus pants), etc. 
     Preferably, the position of one or more of the plurality of attachment zones is indicated by means of a printed ink layer. 
     In exemplary embodiments the distinguishable color and/or colored pattern is provided on at least one of the topsheet, the top core wrap sheet, the backsheet and the back core wrap sheet. The color and/or colored pattern may be provided on either side of the topsheet, the top core wrap sheet, the backsheet and/or the back core wrap sheet. In addition or alternatively, the color and/or colored pattern is provided on an acquisition and/or a distribution layer of the absorbent article. 
     According to a fourth preferred embodiment of the invention, there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet, the absorbent core being positioned in between said topsheet and said backsheet. The absorbent core has a first and second longitudinal edge and a first and second transverse edge. The absorbent core is provided with at least a first attachment zone. In the first attachment zone any one of the following conditions is fulfilled: the top core wrap sheet is attached to the back core wrap sheet along an attachment which extends, seen in a transverse and/or longitudinal direction of the absorbent core, over a transverse and/or longitudinal distance which is at least 1 mm, preferably at least 2 mm, more preferably at least 3 mm, most preferably at least 4 mm; the top core wrap sheet is attached to the back core wrap sheet along a discontinuous attachment at a plurality of locations at a distance of each other, seen in the transverse and/or longitudinal direction of the absorbent core. Upon wetting of the absorbent material, a first channel is created at said first attachment zone. 
     According to an exemplary embodiment, the first attachment zone extends from a crotch region in the direction of the first and/or second transverse edge. 
     According to an alternative embodiment, the first attachment zone extends in the transversal direction of the absorbent core in between the first and second longitudinal edge. 
     Preferably, the absorbent core is provided with at least a second attachment zone. The at least one second attachment zone extends in the transversal direction of the absorbent core in between the first and second longitudinal edge. 
     It is clear to the skilled person that following embodiments may correspond with either one of the above described first, second, third and fourth preferred embodiments. 
     Preferably, outside of the plurality of attachment zones the absorbent core has a maximum thickness; wherein the first and second attachment zone extend through at least 90% of the maximum thickness of the absorbent core, more preferably through 100% of the thickness of the absorbent core such that in the first and second attachment zone substantially no absorbent material is present between the top core wrap sheet and the back core wrap sheet. 
     According to an exemplary embodiment the first attachment zone and the second attachment zone are arranged symmetrically with respect to a longitudinal center line of the absorbent core extending between the first and second transverse edge. 
     Preferably, the attachment between the top core wrap sheet and the back core wrap sheet is any one of the following or a combination thereof: pressure bonding, thermal bonding, sonic bonding, chemical bonding, adhesive. 
     Preferably, the plurality of attachment zones further comprises a third and a fourth attachment zone located at a distance of each other, the third and fourth attachment zone each extending in the direction of the first and/or second transverse edge. 
     Preferably, the distance between the first and the second attachment zone is different from the distance between the third and the fourth attachment zone. 
     According to an exemplary embodiment, the absorbent core has a front portion extending at one side of a transverse crotch line and a rear portion extending at the other side of the transverse crotch line. The first and second attachment zone extend at least in the front portion of the absorbent core; and the third and fourth attachment zone extend at least in the rear portion of the absorbent core. 
     Preferably, the distance between the first and the second attachment zone is smaller than the distance between the third and the fourth attachment zone. 
     Preferably, the first attachment zone is connected to the third attachment zone through a first transverse attachment zone, and the second attachment zone is connected to the fourth attachment zone through a second transverse attachment zone. 
     Preferably, the first and the second attachment zone extend in a longitudinal direction of the absorbent core over a length which is longer than the length of the third and fourth attachment zone, and the first and the second attachment zone are located between the third and fourth attachment zone. 
     In an exemplary embodiment, the third attachment zone and the fourth attachment zone are arranged symmetrically with respect to a longitudinal center line of the absorbent core extending between the first and second transverse edge. 
     Preferably the distance between the first and the second attachment zone is between 10 mm and 50 mm, preferably between 15 mm and 30 mm. 
     According to an exemplary embodiment, the length of the first and the second attachment zone is larger than 60 mm, preferably larger than 70 mm. 
     According to an embodiment, the absorbent material comprises cellulosic fluff pulp. 
     According to an alternative embodiment, the absorbent material is substantially fluffless. 
     Preferably substantially no absorbent material is present in the first and second attachment zone. 
     According to exemplary embodiment, the first and second attachment zone each have a bottom and a top, wherein the top core wrap sheet is attached to the back core wrap sheet at said bottom, at said top, or between said bottom and said top. 
     According to an exemplary embodiment, the absorbent article further comprises at least one transversal attachment zone extending from an end portion of the first attachment zone to a corresponding end portion of the second attachment zone, wherein upon wetting of the absorbent material, a third channel is created at said transversal attachment zone, thus connecting the first and second channels. 
     According to another preferred embodiment of the invention there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet, said absorbent core being positioned in between said topsheet and said backsheet. The absorbent core has a first and second longitudinal edge and a first and second transverse edge. The absorbent core is provided with a plurality of attachment zones comprising at least a first and a second attachment zone, said first and second attachment zone extending next to each other from a crotch region in the direction of the first and/or second transverse edge. A first binder is arranged in a first area between the top core wrap sheet and the back core wrap sheet at a distance from the first and second attachment zone, and a second binder is arranged in a second area between the top core wrap sheet and the back core wrap sheet. Preferably, the first area is substantially complementary to the second area. Preferably, the second area includes the first and second attachment zone. 
     According to yet another preferred embodiment of the invention there is provided an absorbent article comprising a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core comprising an absorbent material between a top core wrap sheet and a back core wrap sheet, said absorbent core being positioned in between said topsheet and said backsheet. The absorbent core has a first and second longitudinal edge and a first and second transverse edge. The absorbent core is provided with at least a first attachment zone extending from a crotch region in the direction of the first and/or second transverse edge. A first binder is arranged in a first area between the top core wrap sheet and the back core wrap sheet at a distance from the first attachment zone, and a second binder is arranged in a second area between the top core wrap sheet and the back core wrap sheet. Preferably, the first area is substantially complementary to the second area. Preferably, the second area includes the first and second attachment zone. 
     According to an exemplary embodiment the first binder is different from the second binder. 
     According to another exemplary embodiment the first binder is the same as the second binder; and a transition zone is distinguishable between the first area and the second area. 
     According to an exemplary embodiment the first binder is arranged as a layer having a first thickness and the second binder is arranged as a layer having a second thickness which is different from the first thickness, preferably higher than the first thickness. 
     According to an exemplary embodiment the first area comprises a plurality of longitudinal stripes; and/or the second area comprises a plurality of longitudinal stripes. 
     According to an embodiment, a first binder is applied to at least one portion of the back core wrap sheet at a distance from the intended position of the first and/or second attachment zones before the absorbent material is applied, and a second binder is applied to at least one portion of the top core wrap sheet before it is applied on top of the absorbent material on the back core wrap sheet. 
     According to an alternative embodiment, a first binder is applied to at least one portion of the top core wrap sheet at a distance from the intended position of the first and/or second attachment zones before the absorbent material is applied, and a second binder is applied to at least one portion of the back core wrap sheet before it is applied on top of the absorbent material on the back core wrap sheet. Preferably, the at least one portion of the top core wrap sheet and the at least one portion of the back core wrap sheet are chosen such that in the application and attachment of the top core wrap sheet to the back core wrap sheet the plurality of portions are complementary, wherein preferably substantially the entire surface of the absorbent article is provided with binder on either the top core wrap sheet or the back core wrap sheet. According to an embodiment the first and second binder are the same binder. In alternative embodiments, the first and second binder are mutually different binders, such as different glues. It is clear to the skilled person that the first and second binder may be applied in either layers with the same thickness, or layers with a different thickness. 
     The skilled person understands that an absorbent article as described above, more in particular in view of the application of binder, can be distinguished from absorbent articles which are manufactured otherwise. More in particular, the above described application of binder, such as glue, is distinguishable in an absorbent article by examining the present bonds within the particular absorbent article by means of any one of the following: color analysis, UV analysis, chemical analysis, and the like. In other words, by examining the absorbent article, the skilled person can determine which type of binder has been used, where the particular binder has been applied, how many layers of binder have been applied, etc. 
     The skilled person will understand that the hereinabove described technical considerations and advantages for absorbent article embodiments also apply to the below described method embodiments, mutatis mutandis. 
     According to a fifth preferred embodiment, there is provided a method for manufacturing an absorbent article, said method comprising the steps of:
         guiding a first sheet material along a rotating member, wherein a surface of said rotating member is provided with a pattern with suction zones and non-suction zones; wherein said non-suction zones comprise at least a first and a second elongate zone extending in a circumferential direction of the rotating member;   applying an absorbent material on said first sheet material on the rotating member such that the suction zones are covered with absorbent material and substantially no absorbent material is present on the non-suction zones;   applying a second sheet material on top of the absorbent material on the first sheet material; wherein one of said first and second sheet material is a top core wrap sheet material, and the other one is a back core wrap sheet material;   attaching said first sheet material to said second sheet material at least in the areas where substantially no absorbent material is present, and such that at least a first and a second attachment zone are formed.       

     Preferably, the attaching is done by applying pressure and heat on the top core wrap sheet material and/or the back core wrap sheet material in the areas where substantially no absorbent material is present. 
     Preferably, a binder is applied to at least one portion of the first sheet material at a distance from the intended position of the first and second attachment zones, before the absorbent material is applied on said first sheet material and a binder is applied to at least one portion of the second sheet material before it is applied on top of the absorbent material on the first sheet material. Preferably, the at least one portion of the first sheet material and the at least one portion of the second sheet material are chosen such that in the application and attachment of the first sheet material to the second sheet material the plurality of portions are complementary, wherein preferably substantially the entire surface of the absorbent article is provided with binder on either the first sheet material or the second sheet material. 
     According to a further embodiment, the attaching is done by a rotating member which is provided with at least a first and a second seal rib dimensioned for applying pressure and heat on the top core wrap sheet material and/or the back core wrap sheet material in the areas where substantially no absorbent material is present in order to create the first and second attachment zone, respectively. 
     Additionally, there is provided a method for manufacturing an absorbent article, said method comprising:
     a. guiding a first sheet material along a conveying or rotating member, wherein a surface of said conveying member is provided with a pattern with at least one suction zone and non-suction zone; wherein said at least one non-suction zone comprises at least a first zone extending in a conveying direction of the conveying member;   b. applying an absorbent material on said first sheet material on the rotating member such that the at least one suction zone is covered with absorbent material and substantially no absorbent material is present on the at least one non-suction zone;   c. applying a second sheet material on top of the absorbent material on the first sheet material; wherein one of said first and second sheet material is a top core wrap sheet material, and the other one is a back core wrap sheet material;   d. attaching said first sheet material to said second sheet material at least in the areas where substantially no absorbent material is present, and such that at least at least a first attachment zone is formed.   

     The attaching may be done by applying pressure and heat on the top core wrap sheet material and/or the back core wrap sheet material in the areas where substantially no absorbent material is present. 
     The attaching may be done by a rotating member which is provided with at least a first seal rib dimensioned for applying pressure and heat on the top core wrap sheet material and/or the back core wrap sheet material in the areas where substantially no absorbent material is present in order to create the first attachment zone. 
     A first binder may be applied to at least one portion of the first sheet material at a distance from the intended position of the first attachment zone, prior to step b, and a second binder may be applied to at least one portion of the second sheet material prior to step c. Preferably, the at least one portion of the first sheet material and the at least one portion of the second sheet material are chosen such that in the application and attachment of the first sheet material to the second sheet material the plurality of portions are complementary, wherein preferably substantially the entire surface of the absorbent article is provided with binder on either the first sheet material or the second sheet material. 
     The first binder applied on at least one portion of the first sheet material may be different from, preferably less strong than, the second binder applied on the at least one portion of the second sheet material. 
     The binder may be applied on at least one portion of the first sheet material as a first layer having a first thickness, and on the at least one portion of the second sheet material as a second layer having a second thickness which is different from, preferably higher than, the first thickness. 
     The binder may be applied on the first sheet material as a plurality of parallel first longitudinal stripes and on the second sheet material as a plurality of parallel second longitudinal stripes, wherein preferably a second longitudinal stripe thereof is located in between two first longitudinal stripes of the plurality of first longitudinal stripes. 
     It is clear to the skilled person that an absorbent article which is manufactured according to any one of the method embodiments as described above can be distinguished from absorbent articles which are manufactured according to another method. More in particular, the above described manner of applying layers of binder, such as glue, is distinguishable in an absorbent article end product by examining the bonds within the particular absorbent article by means of any one of the following: color analysis, UV analysis, chemical analysis, and the like. In other words, by examining the absorbent article end product, the skilled person can determine which type of binder has been used, where the particular binder has been applied, how many layers of binder have been applied, etc. 
    
    
     
       BRIEF DESCRIPTION OF FIGURES 
       The accompanying drawings are used to illustrate presently preferred non-limiting exemplary embodiments of devices of the present invention. The above and other advantages of the features and objects of the invention will become more apparent and the invention will be better understood from the following detailed description when read in conjunction with the accompanying drawings, in which: 
         FIG. 1A  is a perspective view of an exemplary embodiment of a diaper; 
         FIG. 1B  is a top plan view of the diaper of  FIG. 1A ; 
         FIG. 1C  is a schematic cross-section along line C-C of  FIG. 1B ; 
         FIG. 1D  is a schematic cross-section along line D-D of  FIG. 1B ; 
         FIG. 2A  is a perspective view of an exemplary embodiment of a diaper; 
         FIG. 2B  is a top plan view of the diaper of  FIG. 2A ; 
         FIGS. 3-8  are perspective view of other exemplary embodiments of a diaper; 
         FIGS. 9A and 9B  are cross-sectional views illustrating the effect of liquid being absorbed by the absorbent core of an exemplary embodiment of an absorbent article; and 
         FIG. 10  illustrates schematically an exemplary embodiment of a method and apparatus for manufacturing an absorbent article; 
         FIGS. 10A-10D  illustrate a method for manufacturing an absorbent article, wherein  10 A shows glue application to the bottom core wrap,  10 B shows glue application to the top core wrap,  10 C shows the combined bottom and top core wraps, and  10 D shows the absorbent article after the manufacturing steps. 
         FIG. 10E-10H  illustrate elements relating to the exemplary method in which suction is used. 
         FIG. 10E  shows a cross section of an insert placed at a non-suction zone of the exemplary embodiment of  FIG. 10 ; 
         FIG. 10F  shows a top view indicating how inserts may be positioned in order to create non-suction zones for the exemplary embodiment of  FIG. 10 ; 
         FIG. 10G  shows a cross section of the absorbent core when the second sheet  120  is being applied; 
         FIG. 10H  shows a cross section of the absorbent core before attaching the first sheet  110  to the second sheet  120 ; 
         FIG. 11A  shows a top view of an exemplary embodiment of an absorbent core with four attachment zones using a first exemplary embodiment of a sealing pattern; 
         FIG. 11B  shows a top view of an exemplary embodiment of an absorbent core with four attachment zones using a second exemplary embodiment of a sealing pattern; 
         FIG. 11C  shows a top view of an exemplary embodiment of an absorbent core with four attachment zones using a third exemplary embodiment of a sealing pattern; 
         FIG. 11D  illustrates a fourth exemplary embodiment of a possible sealing pattern; 
         FIG. 11E  illustrates a fifth exemplary embodiment of a possible sealing pattern; 
         FIG. 12  is a perspective view of an exemplary embodiment of a diaper in a wetted state; 
         FIGS. 13A and 13B  are cross-sectional views illustrating the effect of liquid being absorbed by a traditional absorbent core and liquid being absorbed by an absorbent core according to an exemplary embodiment of the invention, respectively; 
         FIG. 14  illustrates a schematic cross-section of an absorbent core, wherein three possible locations are indicated for the attachment zones; 
         FIGS. 15A-15X  illustrate exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 16A-16S  illustrate other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 17A-17V  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 18A-18G  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 19A-19D  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 20A-20Z  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 21A-21Z  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 22A-22Z  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 23A-23V  illustrate yet other exemplary embodiments of an absorbent core according to the invention; 
         FIGS. 24A-24C  are photographs of an exemplary embodiment of a diaper in a dry and wetted state; 
         FIGS. 25A-25Z  illustrate yet other exemplary embodiments of an absorbent core according to the invention; and 
         FIGS. 26A-26T  illustrate yet other exemplary embodiments of an absorbent core according to the invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     As used herein, the following terms have the following meanings: 
     “A”, “an”, and “the” as used herein refers to both singular and plural referents unless the context clearly dictates otherwise. By way of example, “an edge barrier” refers to one or more than one edge barrier. 
     “About” as used herein referring to a measurable value such as a parameter, an amount, a temporal duration, and the like, is meant to encompass variations of +/−20% or less, preferably +/−10% or less, more preferably +/−5% or less, even more preferably +/−1% or variations are appropriate to perform in the disclosed invention. However, it is to be understood that the value to which the modifier “about” refers is itself also specifically disclosed. 
     “Absorbent article”, “absorbent garment”, “absorbent product”, “absorbing article”, “absorbing garment”, “absorbing product” and the like as used herein are used interchangeably and refer to devices that absorb and contain bodily exudates, and more specifically, refers to devices that are placed against or in proximity to the body of the wearer to absorb and contain the various liquids discharged from the body. Absorbent articles include but are not limited to feminine hygiene garments, baby diapers and pants, adult incontinence garments, various diaper and pants holders, liners, towels, absorbent inserts and the like. 
     “Absorbent core” as used herein refers to a three-dimensional part of the absorbent structure, comprising liquid-absorbing material, useful to permanently absorb and/or retain bodily exudates. 
     “Absorbent component” as used herein refers to a structural constituent of an absorbent article, e.g., a piece of an absorbent core, such as one of multiple pieces in a multi-piece absorbent core. 
     “Absorbent element” as used herein refers to a part of a functional constituent of an absorbent structure, e.g., a acquisition layer, a dispersion layer, core layer or a release structure formed of a material or materials having particular liquid handling characteristics suitable for the specific function. 
     “Absorbent fibrous polymer material” as used herein refers to an absorbent polymer material which is in threadlike from such as fibers, filaments, and the like so as to be less flowable in the dry state than particulates. 
     “Absorbent insert” as used herein refers to a device adapted for insertion into an “Absorbent layer” as used herein refers to a term referring to a discrete, identifiable sheet-like or web-like element of an absorbent article which may remain detached and relatively movable with respect to another such element or may be attached or joined so as to remain permanently associated with another such element. Each absorbent layer may itself include a laminate or combination of several layers, sheets and/or webs of similar or diverse compositions. 
     “Absorbent polymer material”, “absorbent gelling material”, “AGM”, “superabsorbent”, “superabsorbent material”, “super absorbent polymer”, “SAP” and the like as used herein are used interchangeably and refer to any suitable particulate (e.g., flaked, particulate, granular, or powdered) or fibrous cross linked polymeric materials that can absorb at least 5 times and preferably at least about 10 times or more its weight of an aqueous 0.9% saline solution as measured using the Centrifuge Retention Capacity test (EDANA 441.2-01). 
     “Absorbent polymer material area” as used herein refers to the area of the absorbent structure wherein adjacent layers are separated by a multiplicity of absorbent polymer material. Incidental contact areas between these adjacent layers within the absorbent particulate polymer material area may be intentional (e.g bond area&#39;s) or unintentional (e.g. manufacturing artifacts). 
     “Absorbent particulate polymer material” as used herein refers to an absorbent polymer material which is in particulate form such as powders, granules, flakes and the like so as to be flowable in the dry state. 
     “Absorption” as used herein refers to the process by which a liquid is taken up within a material. 
     “Absorption rate” as used herein refers to the rate of absorption of liquid, i.e. the amount of liquid which is absorbed per unit of time, typically by an absorbent component, element and/or absorbent layer of the absorbent article, structure and/or core. 
     “Acquisition layer”, “acquisition region”, “acquisition surface” or “acquisition material” and the like as used herein refer to the layer overlying the absorbent core having a faster liquid uptake and/or distribution capability. 
     “Absorbency” is the ability of a material to take up fluids by various means including capillary, osmotic, solvent, chemical and/or other action. 
     “Adult incontinence garment” as used herein refers to absorbent articles intended to be worn by incontinent adults, for absorbing and containing bodily exudates. 
     “Adhesion” as used herein refers to the force that holds different materials together at their interface. 
     “Adhesive” as used herein refers to a material, which may or may not be flowable in solution or when heated, that is used to bond materials together. 
     “Adsorption” as used herein refers to the process by which a liquid is taken up by the surface of a material. 
     “Airlaying” as used herein refers to forming a web by dispersing fibers or particles in an air stream and condensing them from the air stream onto a moving screen by means of a pressure and/or vacuum; a web of fibers produced by airlaying is herein referred to an “airlaid”; an airlaid web bonded by one or more techniques to provide fabric integrity is herein referred to an “airlaid nonwoven”. 
     “Apparent density”, “density” as used herein refers to the basis weight of the sample divided by the caliper with appropriate unit conversions incorporated therein. Apparent density used herein has the unit g/cm 3 . 
     “Attach”, “attached” and “attachment” as used herein are synonymous with their counterparts of the terms “fasten”, “affix”, “secure”, “bind”, “join” and “link”. 
     “Baby diaper” as used herein refers to absorbent articles intended to be worn by children, for absorbing and containing bodily exudates which the user draws up between the legs and fastens about the waist of the wearer. 
     “Baby pants” as used herein refers to absorbent articles marketed for use in transitioning children from diapers to underwear intended to cover the lower torso of children, so as to absorb and contain body exudates which article is generally configured like a panty garment and manufactured with a completed waist encircling portion, thereby eliminating the need for the user to fasten the article about the waist of the wearer. 
     “Back region” as used herein refers to the portion of an absorbent article or part thereof that is intended to be positioned proximate the back of a wearer. 
     “Backing” as used herein refers to a web or other material that supports and reinforces the back of a product. 
     “Basis weight” is the weight per unit area of a sample reported in grams per square meter, g/m 2  or gsm. 
     “Bodily exudates”, “body exudates”, “bodily fluids”, “body fluids”, “bodily discharges”, “body discharges”, “fluid(s)”, “liquid(s)”, “fluid(s) and liquid(s) and the like as used herein are used interchangeably and refer to, but are not limited to urine, blood, vaginal discharges, breast milk, sweats and fecal matter. 
     “Binder”, “adhesive”, “glue”, “resins”, “plastics” and the like as used herein are used interchangeably and refer to substances, generally in a solid form (e.g. powder, film, fiber) or as a foam, or in a liquid form (e.g. emulsion, dispersion, solution) used for example by way of impregnation, spraying, printing, foam application and the like used for attaching or bonding functional and/or structural components, elements and materials, for example including heat and/or pressure sensitive adhesives, hot-melts, heat activated adhesives, thermoplastic materials, chemical activated adhesives/solvents, curable materials and the like. 
     “Bond strength” as used herein refers to the amount of adhesion between bonded surfaces. It is a measure of the stress required to separate a layer of material from the base to which it is bonded. 
     “Capillary action”, “capillarity”, or “capillary motion” and the like as used herein are used to refer to the phenomena of the flow of liquid through porous media. 
     “Chassis” as used herein refers to a foundational constituent of an absorbent article upon which the remainder of the structure of the article is built up or overlaid, e.g., in a diaper, the structural elements that give the diaper the form of briefs or pants when configured for wearing, such as a backsheet, a topsheet, or a combination of a topsheet and a backsheet. 
     “Cellulose fibers” as used herein refers to naturally occurring fibers based on cellulose, such as, for example cotton, linen, etc; wood pulp fibers are one example of cellulose fibers; man-made fibers derived from cellulose, such as regenerated cellulose (rayon), or partially or fully acetylated cellulose derivatives (e.g. cellulose acetate or triacetate) are also considered as cellulose fibers. 
     “Cluster” or the like as used herein refers to an agglomeration of particles and/or fibers. 
     “Chemically stiffened fibers”, chemically modified fibers”, “chemically cross-linked fibers”, “curly fibers” and the like as used herein are used interchangeably and refer to any fibers which have been stiffened by chemical means to increase stiffness of the fibers under both dry and aqueous conditions, for example by way of addition of chemical stiffening agents (e.g. by coating, impregnating, etc), altering the chemical structure of the fibers themselves (e.g. by cross-linking polymer chains, etc) and the like. 
     “Cohesion” as used herein refers to the resistance of similar materials to be separated from each other. 
     “Compartment” as used herein refers to chambers, cavities, pockets and the like. 
     “Comprise,” “comprising,” and “comprises” and “comprised of” as used herein are synonymous with “include”, “including”, “includes” or “contain”, “containing”, “contains” and are inclusive or open-ended terms that specify the presence of what follows e.g. a component and do not exclude or preclude the presence of additional, non-recited components, features, elements, members, steps, known in the art or disclosed therein. 
     “Coverstock” as used herein refers to a lightweight non-woven material used to contain and conceal an underlying absorbent core material; examples are the facing layer or materials that cover the absorbent cores of feminine hygiene garment s, baby diapers and pants and adult incontinence garments. 
     “Crotch region” of an absorbent article as used herein refers to about 50% of the absorbent article&#39;s total length (i.e., in the y-dimension), where the crotch point is located in the longitudinal center of the crotch region. That is, the crotch region is determined by first locating the crotch point of the absorbent article, and then measuring forward and backward a distance of 25% of the absorbent article&#39;s total length. 
     “Cross direction (CD)”, “lateral” or “transverse” and the like as used herein are used interchangeably and refer to a direction which is orthogonal to the longitudinal direction and includes directions within ±45° of the transversal direction. 
     “Curing” as used herein refers to a process by which resins, binders or plastics are set into or onto fabrics, usually by heating, to cause them to stay in place; the setting may occur by removing solvent or by cross-linking so as to make them in soluble. 
     “Diaper”, “conventional diaper”, “diaper-like”, “diaper-like garment” and the like as used herein are used interchangeably and refer to disposable absorbent articles, which typically include a front waist portion and a back waist portion which may be releasable connected about the hips of the wearer during use by conventional fasteners such as adhesive tape fasteners or hook and loop type fasteners. In use, the article is positioned between the legs of the wearer and the fasteners are releasable attached to secure the back waist portion to the front waist portion of the diaper, thereby securing the diaper about the waist of the wearer. The front waist portion and a back waist portion are connected by relatively non-stretchable or stretchable members (the term “stretchable” as used herein refers to materials that are extensible when forces are applied to the material, and offer some resistance to extension). Hence, such articles are generally not configured to be pulled up or down over the hips of the wearer when the fasteners are attached. 
     “Dispersion layer”, “dispersion region”, “dispersion surface” or “dispersion material” and the like as used herein refer to the layer overlying the absorbent core having a faster liquid uptake and dispersion capability. 
     “Disposable” is used herein to describe articles that are generally not intended to be laundered or otherwise restored or reused (i.e., they are intended to be discarded after a single use and, preferably, to be recycled, composted or otherwise disposed of in an environmentally compatible manner). 
     “Drylaying” as used herein refers to a process for making a nonwoven web from dry fiber; these terms apply to the formation of carded webs, as well as to the air laying formation of random webs; a web of fibers produced by drylaying is herein referred to as a “drylaid”; a drylaid web bonded by one or more techniques to provide fabric integrity is herein referred to a “drylaid nonwoven”. 
     “Dry strength” as used herein refers to the strength of a joint determined in dry state conditions, immediately after drying under specified conditions or after a period of conditioning in the standard laboratory atmosphere. 
     “Essentially cellulose free” or “little to no cellulose fibers” as used herein refers to an absorbent article, structure, core component and/or element containing less than 20% by weight cellulosic fibers, less than 10% cellulosic fibers, less than 5% cellulosic fibers, no cellulosic fibers, or no more than an immaterial amount of cellulosic fibers which do not materially affect the thinness, flexibility or absorbency thereof. 
     “Essentially fluffless” or “little to no fluff pulp” as used herein refers to an absorbent article, structure, core, component and/or element containing less than 20% by weight fluff pulp, less than 10% fluff pulp, less than 5% fluff pulp, no fluff pulp, or no more than an immaterial amount of fluff pulp which do not materially affect the thinness, flexibility or absorbency thereof. 
     “Fabric” as used herein refers to a sheet structure made from fibers, filaments and/or yarns. 
     “Feminine hygiene garments” as used herein refer to absorbent hygiene articles intended to be worn by woman, for absorbing and containing body exudates. 
     “Fiber” as used herein refers to the basic threadlike structure from which nonwovens, yarns and textiles are made. It differs from a particle by having a length at least 4 times its width; “Natural fibers” are either of animal (wool, silk), vegetable (cotton, flax, jute) or mineral (asbestos) origin, while “Man-made fibers” may be either polymers synthesized from chemical compounds (polyester, polypropylene, nylon, acrylic etc.) or modified natural polymers (rayon, acetate) or mineral (glass). “Fiber” and “filament” are used interchangeably. 
     “Fluff pulp” or “Pulp fluff” as used herein refers to wood pulp specially prepared to be drylaid. The fibers can be either natural or synthetic or a combination thereof. 
     “Front region” as used herein refers to the portion of an absorbent article or part thereof that is intended to be positioned proximate the front of a wearer. 
     “Garment facing layer” as used herein refers to elements of the chassis that form the outer surface of the absorbent article, such as the backsheet, the side panels, the waist fasteners, and the like, when such elements are present. 
     “Heat activated adhesive” as used herein refers to a dry adhesive that is rendered tacky or fluid by application of heat or heat and pressure to the assembly. 
     “Heat sealing adhesive” as used herein refers to a thermoplastic adhesive which is melted between the adherent surfaces by heat application to one or both of the adjacent adherent surfaces. 
     “High loft” as used herein refers to general term of low density, thick or bulky fabrics. 
     “Hot-melt adhesive” as used herein refers to a solid material that melts quickly upon heating, then sets to a firm bond upon cooling; used for almost instantaneous bonding. 
     “Hydrophilic” as used herein refers to having an affinity for being wetted by water or for absorbing water. 
     “Hydrophobic” as used herein refers to lacking the affinity for being wetted by water or for absorbing water. 
     “Immobilization layer” as used herein refers to a layer able to be applied to the absorbent polymer material or absorbent polymer material area with the intent to gather, bond and/or immobilize absorbent material and/or absorbent layer. 
     “Join”, “joined” and “joining” as used herein refers to encompassing configurations wherein an element is directly secured to another element by affixing the element directly to the other element, as well as configurations wherein the element is indirectly secured to the other element by affixing the element to an intermediate member or members which in turn is or are affixed to the other element. 
     “Knitting” as used herein refers to the technique for interlocking loops of fibers with needles or similar devices. 
     “Layer” refers to identifiable components of the absorbent article, and any part referred to as a “layer” may actually comprise a laminate or combination of several sheets or webs of the requisite type of materials. As used herein, the term “layer” includes the terms “layers” and “layered.” “Upper” refers to the layer of the absorbent article which is nearest to and/or faces the wearer facing layer; conversely, the term “lower” refers to the layer of the absorbent article which is nearest to and/or faces the garment facing layer. “Layer” is three dimensional structure with a x dimension width, y dimension length, and z-dimensions thickness or caliper, said x-y dimensions being substantially in the plane of the article, however it should be noted that the various members, layers, and structures of absorbent articles according to the present invention may or may not be generally planar in nature, and may be shaped or profiled in any desired configuration. 
     “Machine direction (MD)”, “longitudinal” and the like as used herein are used interchangeably and refer to a direction running parallel to the maximum linear dimension of the structure and includes directions within ±45° of the longitudinal direction. 
     “Major surface” as used herein refers to a term used to describe the surfaces of greatest extent of a generally planar or sheet-like structural element and to distinguish these surfaces from the minor surfaces of the end edges and the side edges, i.e., in an element having a length, a width, and a thickness, the thickness being the smallest of the three dimensions, the major surfaces are those defined by the length and the width and thus having the greatest extent. 
     “Mass flow” as used herein refers to the f low of a liquid from one absorbent element or component to another absorbent element or component by channel flow action. 
     “Mechanical bonding” as used herein refers to a method of bonding fibers by entangling them. This can be achieved by needling, stitching with fibers or by the use of high-pressure air or water jets and the like. 
     “Nonwoven” as used herein refers to manufactured sheet, web or batt of directionally or randomly orientated fibers, bonded by friction, and/or cohesion and/or adhesion, excluding paper and products which are woven, knitted, tufted, stitch-bonded incorporating binding yarns or filaments, or felted by wet-milling, whether or not additionally needled. The fibers may be of natural or man-made origin and may be staple or continuous filaments or be formed in situ. Commercially available fibers have diameters ranging from less than about 0.001 mm to more than about 0.2 mm and they come in several different forms: short fibers (known as staple, or chopped), continuous single fibers (filaments or monofilaments), untwisted bundles of continuous filaments (tow), and twisted bundles of continuous filaments (yarn). Nonwoven fabrics can be formed by many processes such as melt blowing, spun bonding, solvent spinning, electrospinning, and carding. The basis weight of nonwoven fabrics is usually expressed in grams per square meter (gsm). 
     “Pant”, “training pant”, “closed diapers”, “prefastened diapers”, “pull-on diapers” and “diaper-pants” and the like as used herein are used interchangeably and refer to absorbent articles which are typically applied to the wearer by first leading the feet into the respective leg openings and subsequently pulling the pants from the feet to waist area over the hips and buttocks of the wearer and which are capable of being pulled up or down over the hips of the wearer. Typically, such articles may include a front waist portion and a back waist portion which may be connected about the hips of the wearer by integral or releasable members. A pant may be preformed by any suitable technique including, but not limited to, joining together portions of the article using refastenable and/or nonrefastenable bonds (e.g., seam, weld, adhesive, cohesive bond, fastener, etc.). A pant may be preformed anywhere along the circumference of the article (e.g., side fastened, front waist fastened). 
     “Polymer” as used herein refers to but is not limited to, homopolymers, copolymers, such as for example, block, graft, random and alternating copolymers, terpolymers, etc. and blends and modifications thereof. Unless otherwise specifically limited, the term “polymer” includes all possible spatial configurations of the molecule and include, but are not limited to isotactic, syndiotactic and random symmetries. 
     “Rear” as used herein refers to the portion of an absorbent article or part thereof that is intended to be positioned proximate the back of the wearer. 
     “Release structure”, “release region”, “release surface” or “release material” and the like as used herein are used interchangeably and refer to a structure in fluid communication with the absorbent core having a larger relative liquid absorption capacity and/or rate allowing it to quickly take up, temporarily hold and releasing liquids. 
     “Resin” as used herein refers to a solid or semisolid polymeric material. 
     “Thermobonding” as used herein refers to a method of bonding fibers by the use of heat and/or high-pressure. 
     “Thermoplastic” as used herein refers to polymeric materials that have a melting temperature and can flow or be formed into desired shapes on the application of heat at or below the melting point. 
     “Ultrasonic” as used herein refers to the use of high frequency sound to generate localized heat through vibration thereby causing thermoplastic fibers to bond to one another. 
     “Water-absorbing”, “liquid-absorbing”, “absorbent”, “absorbing” and the like as used herein are used interchangeably and refer to compounds, materials, products that absorb at least water, but typically also other aqueous fluids and typically other parts of bodily exudates such as at least urine or blood. 
     “Wearer facing layer” as used herein refers to elements of the chassis that form the inner surface of the absorbent article, such as the topsheet, the leg cuffs, and the side panels, etc., when such elements are present. 
     “Weaving” as used herein refers to the process of interlacing two or more sets of yarns at right angles to form a fabric; a web of fibers produced by weaving is herein referred to as a “woven”. 
     “Web material” as used herein refers to an essentially endless material in one direction, i.e. the longitudinal extension or the length, or the x-direction in Cartesian coordinates relative to the web material. Included in this term is an essentially unlimited sequence of pieces cut or otherwise separated from an essentially endless material. Often, though not necessarily, the web materials will have a thickness dimension (i.e. the z-direction) which is significantly smaller than the longitudinal extension (i.e. in x-direction). Typically, the width of web materials (they-direction) will be significantly larger than the thickness, but less than the length. Often, though not necessarily, the thickness and the width of such materials is essentially constant along the length of the web. Without intending any limitation, such web materials may be cellulosic fiber materials, tissues, woven or nonwoven materials and the like. Typically, though not necessarily, web materials are supplied in roll form, or on spools, or in a folded state in boxes. The individual deliveries may then be spliced together to form the essentially endless structure. A web material may be composed of several web materials, such as multilayer non-woven, coated tissues, nonwoven/film laminates. Web materials may comprise other materials, such as added binding material, particles, hydrophilizing agents and the like. 
     “Wet burst strength” is a measure of a layer&#39;s ability to absorb energy, when wet and subjected to deformation normal to the plane of the web. 
     “Wet strength” as used herein refers to the strength of a joint determined immediately after removal from a liquid in which it has been immersed under specified conditions of time, temperature and pressure. The term is commonly used in the art to designate strength after immersion in water. 
     “Wetlaying” as used herein refers to the forming a web from an aqueous dispersion of fibers by applying modified paper making techniques; a web of fibers produced by wetlaying is herein referred to as a “wetlaid”. 
     “Wood pulp” as used herein refers to cellulosic fibers used to make viscose rayon, paper and the absorbent cores of products such as feminine hygiene garments, baby diapers and pants and adult incontinence garments. 
     “X-y dimension” as used herein refers to the plane orthogonal to the thickness of the article, structure or element. The x- and y-dimensions correspond generally to the width and length, respectively, of the article, structure or element. 
     “Z-dimension” as used herein refers to the dimension orthogonal to the length and width of the article, structure or element. The z-dimension corresponds generally to the thickness of the article, structure or element. 
     Note that while in the exemplary embodiments described the at least one attachment zone is embodied as a plurality of channels, other configurations are not excluded and will be within the purview of the skilled person. 
     Unless otherwise defined, all terms used in disclosing the invention, including technical and scientific terms, have the meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. By means of further guidance, term definitions are included to better appreciate the teaching of the present invention. 
     The same or similar features and components are indicated with the same reference numerals throughout the figures. 
       FIGS. 1A, 1B, 1C and 1D  illustrate an exemplary embodiment of an absorbent article, here a diaper.  FIG. 1B  shows the absorbent article in its flat out, un-contracted state with the wearer side facing the viewer. The skilled person understands that the absorbent article may also be a pant or an adult incontinence garment or the like. The absorbent article  100  comprises a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core  130  positioned in between the topsheet and the backsheet. The absorbent core  130  comprises absorbent material  105  between a top core wrap sheet  110  and a back core wrap sheet  120 . Absorbent core  130  has a first and second longitudinal edge  131 ,  132  and a first and second transverse edge  133 ,  134 . 
     The absorbent core  130  is provided with a plurality of attachment zones  145 ,  155 ,  165 ,  175  comprising at least a first attachment zone  145  and a second attachment zone  155 . The first and second attachment zones extend next to each other from the crotch region CR in the direction of the first and/or second transverse edge  133 ,  134 . In first and second attachment zone  145 ,  155  the top core wrap sheet  110  is attached to the back core wrap sheet  120 
         along an attachment which extends, seen in a transverse direction of the absorbent core, over a transverse distance which is at least 1 mm, preferably at least 2 mm, more preferably at least 3 mm, most preferably at least 4 mm; and/or   along a discontinuous attachment at a plurality of locations at a distance of each other, seen in the transverse direction of the absorbent core. In that manner, upon wetting of the absorbent material, a first and second channel  140 ,  150  are created at said first and second attachment zone  145 ,  155 , respectively.       

     Absorbent article  100  is provided at said top core wrap sheet with at least a first and a second attachment zone  145 ,  155  located a distance d 12  of each other. In that manner a first and second channel  140 ,  150  formed upon wetting, each extend from a crotch region CR in the direction of the first transverse edge  133 . Preferably the distance d 12  is between 10 mm and 50 mm, more preferably between 15 and 30 mm. Preferably, the length of the first and second channel is substantially the same, more preferably the length  11  of the first channel and the length  12  of the second channel is between 60 mm and 140 mm, more preferably between 75 mm and 125 mm. Preferably, the distance between the first attachment zone  145  and the first longitudinal side  131  is between 20 and 30 mm, and the distance between the second attachment zone  155  and the second longitudinal side  132  is between 20 and 30 mm. Preferably, the distance between the first/second attachment zone  145 ,  155  and the transverse edge  133  is between 50 and 125 mm, more preferably between 75 and 115 mm. 
     First channel  140  and second channel  150  are substantially parallel and run in the longitudinal direction of absorbent core  130 . However, it is also possible for first and second channel  140 ,  150  to extend under a small angle with respect to the longitudinal direction of absorbent core  130 , e.g. an angle between 5 and 10°. For example, first and second attachment zone  145 ,  155  (and hence first and second channel  140 ,  150 ) may be diverging slightly outwardly in the direction of first transverse edge  133 . Preferably first channel  140  and second channel  150  are arranged symmetrically with respect to a longitudinal center line CL of absorbent core  130 . 
     Absorbent article  100  is further provided with a third and a fourth channel  160 ,  170  located at a distance d 34  of each other. Third and fourth channel  160 ,  170  each extend from crotch region CR in the direction of second transverse edge  134 . The distance d 12  between first and second channel  140 ,  150  is different from the distance d 34  between third and fourth channel  160 ,  170 . Preferably the distance d 34  is between 25 mm and 80 mm, more preferably between 35 mm and 55 mm. Preferably, the length of the third and fourth channel  160 ,  170  is substantially the same, more preferably the length  13  of the third channel and the length  14  of the fourth channel is between 30 mm and 130 mm, more preferably between 30 mm and 70 mm. Preferably, the distance between the third attachment zone  165 /third channel  160  and the first longitudinal side  131  is between 20 and 30 mm, and the distance between the fourth attachment zone  175  and the second longitudinal side  132  is between 20 and 30 mm. Preferably, the distance between the third/fourth attachment zone  165 ,  175  and the transverse edge  134  is between 30 mm and 100 mm, more preferably between 40 mm and 75 mm. 
     Third channel  160  and fourth channel  170  are substantially parallel and run in the longitudinal direction of absorbent core  130 . However, it is also possible for third and fourth channel  160 ,  170  to extend under a small angle with respect to the longitudinal direction of absorbent core  130 , e.g. an angle between 5 and 10°. For example, third and fourth channel  160 ,  170  may be diverging slightly outwardly in the direction of second transverse edge  134 . Preferably third channel  160  and fourth channel  170  are arranged symmetrically with respect to a longitudinal center line CL of absorbent core  130 . 
     Preferably, the distance between an end point  141  of first channel  140  and an end point  161  of third channel  160  is smaller than 25 mm, more preferably smaller than 20 mm. Similarly, preferably, the distance between an end point  151  of second channel  150  and an end point  171  of fourth channel  170  is smaller than 25 mm, more preferably smaller than 20 mm. More preferably, endpoints  141 ,  151 ,  161  and  171  are located on substantially the same transverse line L functioning as a fold line along which the diaper can be folded in two. 
     First, second, third and fourth channel  140 ,  150 ,  160 ,  170  each have a bottom which forms the attachment zone  145 ,  155 ,  165 ,  175 , see  FIG. 1C  and  FIG. 1D . At bottom  145 ,  155 ,  165 ,  175  top core wrap sheet  110  is attached to back core wrap sheet  120 . The width w of the bottom, seen in a transverse direction of absorbent core  130 , is preferably larger than 2 mm, more preferably larger than 3 mm and even more preferable larger than 4 mm. To that end the attachment between top core wrap sheet  110  and the back core wrap sheet  120  may be an attachment extending over a transverse distance which is at least 2 mm, preferably at least 3 mm, more preferably at least 4 mm; and/or the attachment may be a discontinuous attachment in a plurality of locations at a distance of each other, seen in a transverse direction of absorbent core  130 . Preferably the attachment at the bottom between the top core wrap sheet and the back core wrap sheet is realized by any one of the following or a combination thereof: pressure bonding, thermobonding, sonic bonding, chemical bonding, adhesive, mechanical bonding. 
     Outside of the plurality of channels  140 ,  150 ,  160 ,  170 , absorbent core  130  has a maximum thickness t. Preferably, each channel  140 ,  150 ,  160 ,  170  extends through at least 90% of the maximum thickness of absorbent core  130 , more preferably through 100% of the thickness of absorbent core  130 , such that, in the channel  140 ,  150 ,  160 ,  170 , substantially no absorbent material is present that between top core wrap sheet  110  and back core wrap sheet  120 . It is noted that the channel  140 ,  150 ,  160 ,  170  may be located below and/or above the attachment zones  145 ,  155 ,  165 ,  175 , as will be explained in more detail below with reference to  FIG. 14 . 
     In a possible embodiment the attachment  145 ,  155 ,  165 ,  175  between top core wrap sheet  110  and back core wrap sheet  120 , here at a bottom of each channel  140 ,  150 ,  160 ,  170 , is a semi-permanent attachment configured to release after having been in contact with urine for a predetermined period of time, wherein said predetermined period of time is preferably smaller than 30 s. 
     In another possible embodiment the attachment  145 ,  155 ,  165 ,  175  between top core wrap sheet  110  and back core wrap sheet  120 , here at the bottom of each channel  140 ,  150 ,  160 ,  170 , is a permanent attachment; and absorbent core  130  is configured such that, in a wetted state of absorbent core  130 , the absorbent material extends over bottom  145 ,  155 ,  165 ,  175  of channel  140 ,  150 ,  160 ,  170 . This is illustrated in  FIGS. 9A and 9B  for first and second channels  140 ,  150 . Channels  140 ,  150 ,  160 ,  170  guide urine U or any other aqueous liquid through the side walls of channels  140 ,  150 ,  160 ,  170  into absorbent core  130 . Those side walls create an additional path along which the liquid can flow into absorbent core  130  and enhance the diffusion of the liquid into absorbent core  130 . Also, because of the swelling of the core material of absorbent core  130 , the outer bands of absorbent core  130  will rotate around channels  140 ,  150 ,  160 ,  170  as indicated by arrows A in  FIG. 9B . In that manner the diaper takes the shape of a tub or cup, such that any liquid NL which would not yet be absorbed by the absorbent material  105  is maintained in the tub shape. This results in a better protection against leakage and a diaper fitting perfectly to the body. Hence the diaper of  FIGS. 1A-1D  will create more freedom of movement for the wearer of a wetted diaper. 
     It is clear to the skilled person that the attachment zones may be provided by means of continuous attachments in the transversal direction of the absorbent core and/or continuous attachments in the longitudinal direction of the absorbent core and/or discontinuous attachments in the transversal direction of the absorbent core and/or discontinuous attachments in the longitudinal direction of the absorbent core. 
     Absorbent core  130  has a front portion  130   a  extending at one side of a transverse crotch line which corresponds in this embodiment with fold line L, and a rear portion  130   b  extending at the other side of the transverse crotch line L. First and second channel  140 ,  150  extend at least in front portion  130   a  of absorbent core  130 , and third and fourth channel  160 ,  170  extend at least in rear portion  130   b  of the absorbent core  130 . Preferably the distance d 12  between first and second channel  140 ,  150  in front portion  130   a  is smaller than the distance d 34  between third and fourth channel  160 ,  170  in rear portion  130   b.    
     The plurality of channels  140 ,  150 ,  160 ,  170  together cover at least 60%, preferably at least 70% of the length la of absorbent core  130 ; indeed, in the embodiment of  FIG. 1A-1D  the channels cover a length equal to l1+l3 which is more than 60% of the length la of absorbent core  130 . 
     The plurality of channels  140 ,  150 ,  160 ,  170  may be indicated with a color and/or with a pattern which is different from the color and/or pattern of topsheet. More in particular the area of the channels may comprise a print allowing a user to visually distinguish the channels. This print may be arranged on the topsheet, on the top core wrap sheet, on the back core wrap sheet, on the backsheet, or on any sheet in between the topsheet and the backsheet, as long as it is visible for a user. As the sheets may be partially transparent, the print may be arranged on a sheet in between the topsheet and the backsheet, as long as it is visible through the topsheet and/or the backsheet. Preferably the print is visible when looking at the topsheet of the diaper. For example, a topsheet area above first and second channels  140 ,  150  may be printed with an ink of a first color and a topsheet area above third and fourth channels  160 ,  170  may be printed with the same color or with a different color. In that manner a user will be able to easily recognize the front and rear portion of a diaper, and will recognize more easily how to put on the diaper. 
     The chassis of the diaper  100  in  FIGS. 1A-1D  comprises a liquid pervious topsheet (not shown in  FIGS. 1C and 1D , but the topsheet is a layer above top core wrap sheet  110 ) and liquid impervious backsheet (not shown in  FIGS. 1C and 1D , but the backsheet is a layer below back core wrap sheet  110 ). The topsheet may be attached to the top core wrap sheet  110 , e.g. in the attachment zones  140 ,  150 ,  160 ,  170 . Also, the backsheet may be attached to the back core wrap sheet  120 , e.g. in the attachment zones  140 ,  150 ,  160 ,  170 . Preferably the chassis further includes side panels or ears  210 , elasticized leg cuffs  230  and elastic waist elements (not shown). A front end portion of diaper  100  is configured as a front waist region  100   a . The opposite rear end portion is configured as a back waist region  100   b  of diaper  100 . An intermediate portion of diaper  100  is configured as crotch region CR, which extends longitudinally between first and second waist regions  100   a  and  100   b . Waist regions  100   a  and  100   b  may include elastic waist elements such that they gather about the waist of the wearer to provide improved fit and containment. Crotch region CR is that portion of diaper  100  which, when the diaper  100  is worn, is generally positioned between the wearer&#39;s legs. The periphery of diaper  100  is defined by the outer edges of the diaper  100  in which longitudinal edges  101 ,  102  run generally parallel to a longitudinal axis of diaper  100  and transverse end edges  103 ,  104  run between the longitudinal edges  101 ,  102  generally parallel to a transverse axis of diaper  100 . The chassis also comprises a fastening system, which may include at least one fastening or securing member  212  and at least one landing zone  220 . The various components within diaper  100  may be bound, joined or secured by any method known in the art, for example by adhesives in uniform continuous layers, patterned layers or arrays of separate lines, spirals or spots. Top core wrap sheet, topsheet, back core wrap sheet, backsheet, absorbent material and other components may be assembled in a variety of well-known configurations and are well known in the art. 
     Backsheet covers absorbent core  130  and preferably extends beyond the absorbent core  130  toward longitudinal edges  101 ,  102  and end edges  103 ,  104  of diaper  100  and may be joined with top sheet. Backsheet prevents bodily exudates absorbed by the absorbent core  130  and contained within diaper  100  from soiling other external articles that may contact the wearer, such as bed sheets and undergarments. In preferred embodiments, backsheet is substantially impervious to bodily exudates and comprises a laminate of a nonwoven and a thin plastic film such as a thermoplastic film. Backsheet may comprise breathable materials that permit vapor to escape from diaper  100  while still preventing bodily exudates from passing through backsheet. It may be semi-rigid, non-elastic and can be made fully or partially elasticized and include backing. 
     The top sheet which is located above the top core wrap sheet  110 , is preferably soft, exhibits good strikethroughs and has a reduced tendency to rewet from the liquid absorbent material. Top sheet may be semi-rigid and non-elastic, or may be fully or partially elasticized. Topsheet is intended to be placed in close proximity to the skin of the wearer when diaper  100  is worn. Topsheet permits bodily exudates to rapidly penetrate it so as to flow more quickly toward absorbent core  130  via a top surface thereof and via the plurality of channels  140 ,  150 ,  160 ,  170 , preferably not allowing such bodily exudates to flow back through topsheet. Topsheet may be constructed from any one of a wide range of liquid and vapor permeable, preferably hydrophilic, materials. The upper and lower surface of topsheet may be treated differently. Topsheet may include e.g. a surfactant on the upper surface so as to facilitate liquid transfer there through, especially at a central zone or area of topsheet located over absorbent core  130 , and/or a hydrophobic agent on the lower surface to minimize the liquid contained within absorbent core  130  from contact wetting topsheet thereby reducing rewet values. Topsheet may be coated with a substance having rash preventing or rash reducing properties. Preferably, topsheet covers substantially the entire wearer facing area of diaper  100 , including substantially all of front waist region  100   a , back waist region  100   b , and crotch region CR. Optionally, side panels  210 ,  210 ′ and/or waist feature layers of the inner region may be formed from the same single topsheet material. Alternatively, topsheet may be formed from multiple different materials which vary across of topsheet. Such a multiple piece design allows for creation of preferred properties and different zones of the topsheet. 
     Absorbent core  130  may comprise any absorbent material that is generally compressible, conformable, non-irritating to the wearer&#39;s skin, and capable of absorbing and retaining bodily exudates. Absorbent core  130  may comprise a wide variety of liquid absorbent materials commonly used in absorbent articles. Preferably, absorbent core  130  comprises fluff material, typically cellulosic fluff pulp. However, in other embodiments, absorbent core  130  may be substantially fluffless and comprise superabsorbent polymers. Also, absorbent core  130  may comprise a combination of cellulosic fluff pulp and superabsorbent polymers. Absorbent core  130  may be configured to extend substantially the full length and/or width of diaper  100 . However, as in the embodiment of  FIGS. 1A-1D , preferably absorbent structure  130  is not coextensive with the entire diaper  100  and is limited to certain regions of diaper  100  including crotch region CR. In various embodiments, the absorbent core  300  extends to the edges of diaper  100  but the absorbent material is concentrated in the crotch region CR or another target zone of the diaper  100 . In  FIGS. 1A-1D , absorbent core  130  is shown as having a substantially rectangular configuration, however, absorbent core  130  may be shaped differently, such as, elliptical, dogbane shaped, T-shaped or I-shaped. More in particular the width of the front portion  130   a  may be smaller than the width of the rear portion  130   b  of the absorbent core. 
     Examples of commonly occurring absorbent materials used for absorbent core  130  are cellulosic fluff pulp, tissue layers, highly absorbent polymers (so called superabsorbents), absorbent foam materials, absorbent nonwoven materials or the like. It is common to combine cellulosic fluff pulp with superabsorbent polymers in an absorbent core. Superabsorbent polymers are water-swellable, water-insoluble organic or inorganic materials capable of absorbing at least about 20 times its weight and in an aqueous solution containing 0.9 weight percent of sodium chloride. 
     Diaper  100  may also utilize a pair of containment walls or cuffs  230 . Each cuff  230  is a longitudinally extending wall structure preferably positioned on each side of absorbent core  130  and spaced laterally from the center line CL. Preferably, cuffs  230  are attached, for example, by adhesive or sonic bonding to the lower structure. Preferably, cuffs  230  are equipped with elastic members. When released or otherwise allowed relaxing, the elastic members retract inwardly. When diaper  100  is worn, the elastic members function to contract cuffs  230  about the buttocks and the thighs of the wearer in a manner, which forms a seal between diaper  100 , the buttocks and the thighs. 
     The waist regions  100   a  and  100   b  each comprise a central region and a pair of side panels or ears  210 ,  210 ′ which typically comprise the outer lateral portions of the waist regions. These side panels  210 ,  210 ′ may be unitary with the chassis or may be attached or joined thereto by any means know in the art. Preferably, the side panels  210  positioned in the back waist region  100   b  are flexible, extensible and/or elastic in at least the lateral direction. In another embodiment the side panels  210  are non-elastic, semi-rigid, rigid and/or stiff. In order to keep diaper  100  in place about the wearer, preferably at least a portion of the back waist region  100   b  is attached by fastening or securing members  212  to at least a portion of the front waist region  100   a . The fastening or securing members  212  may be e.g. adhesive, mechanical fasteners, hook and loop features, conceivable strings and/or combinations thereof. The fastening or securing members  212  may also be co-adhesive such that they adhere to each other but not other materials. Preferably the materials making up the fastening or securing members  212  are flexible, extensible and/or elastic, allowing them to better conform to the shape and movements of the body and thus, to reduce the likelihood that the fastening system will irritate or injure the wearer&#39;s skin. Alternatively, the absorbent article may be pants and the like. In this configuration, the absorbent article may or may not have fastening members. 
     Diaper  100  may also employ additional layers, such as an acquisition layer and/or dispersion layer situated between topsheet and absorbent core  130 , and/or coverstock layers, and/or other layers situated between absorbent core  130  and backsheet. An acquisition layer and/or dispersion layer serves to slow down the flow so that the liquid has adequate time to be absorbed by absorbent core  130 .  FIGS. 9A and 9B  show an acquisition layer  190  above top core wrap layer  110 . 
     Diaper  100  may also include such other features, components and elements as are known in the art including waistbands, waist cap features, elastics and the like to provide better fit, containment and aesthetic characteristics. These features may be assembled in a variety of well-known configurations and are well known in the art. 
       FIGS. 2A and 2B  illustrate another exemplary embodiment of a diaper  100 . Diaper  100  comprises a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core  130  positioned in between topsheet and backsheet. Absorbent core  130  has a first and second longitudinal edge  131 ,  132  and a first and second transverse edge  133 ,  134 . Absorbent article  100  is provided at the top core wrap sheet  110  with a first and a second attachment zone  145 ,  155  for creating a first and second channel  140 ,  150  located a distance d 12  of each other. First and second channel  140 ,  150  each extend from a crotch region CR in the direction of the first transverse edge  133  and the second transverse edge  134 . In this embodiment, preferably, first and second channel extend over more than 80% of the length of absorbent core  130 . Preferably the distance d 12  is between 10 mm and 50 mm, more preferably between 15 and 30 mm. Preferably, the length of the first and second channel is substantially the same, more preferably the length  11  of the first channel and the length  12  of the second channel is between 100 mm and 300 mm, more preferably between 100 mm and 250 mm. Preferably, the distance between the first/second attachment zone  145 ,  155  and the transverse edge  133  is between 50 and 125 mm, more preferably between 75 and 115 mm, and the distance between the first/second attachment zone  145 ,  155  and the transverse edge  134  is between 50 and 125 mm, more preferably between 75 and 115 mm. 
     First channel  140  and second channel  150  are substantially parallel and run in the longitudinal direction of absorbent core  130 . However, it is also possible for first and second channel  140 ,  150  to extend under a small angle with respect to the longitudinal direction of absorbent core  130 , e.g. an angle between 5 and 10°. For example, first and second channel  140 ,  150  may be diverging slightly outwardly in the direction of first transverse edge  133  and may be diverging slightly outwardly in the direction of second transverse edge  134 . Preferably first channel  140  and second channel  150  are arranged symmetrically with respect to a longitudinal center line CL of absorbent core  130 . 
     Absorbent article  100  is further provided with a third and a fourth channel  160 ,  170  located a distance d 34  of each other. Third and fourth channel  160 ,  170  each extend from crotch region CR in the direction of first and second transverse edge  134 . The distance d 12  between first and second channel  140 ,  150  is different from the distance d 34  between third and fourth channel  160 ,  170 . Preferably the distance d 34  is between 25 mm and 85 mm, more preferably between 35 mm and 55 mm. Preferably, the length of the third and fourth channel  160 ,  170  is substantially the same, more preferably the length  13  of the third channel and the length  14  of the fourth channel is between 50 mm and 150 mm, more preferably between 60 mm and 140 mm. Preferably, the distance between the third attachment zone  165  and the first longitudinal side  131  is between 10 and 30 mm, and the distance between the second attachment zone  175  and the second longitudinal side  132  is between 10 and 30 mm. 
     Third channel  160  and fourth channel  170  are substantially parallel and run in the longitudinal direction of absorbent core  130 . However, it is also possible for third and fourth channel  160 ,  170  to extend under a small angle with respect to the longitudinal direction of absorbent core  130 , e.g. an angle between 5 and 10°. For example, third and fourth channel  160 ,  170  may be diverging slightly outwardly in the direction of first transverse edge  133  and second transverse edge  134 . Preferably third channel  160  and fourth channel  170  are arranged symmetrically with respect to a longitudinal center line CL of absorbent core  130 . 
     In this embodiment, first, second, third and fourth channel  140 ,  150 ,  160 ,  170  each have a bottom  145 ,  155 ,  165 ,  175 , similar to the bottom illustrated in  FIG. 1C  and  FIG. 1D  for the first embodiment of  FIGS. 1A-1D . At bottom  145 ,  155 ,  165 ,  175  top core wrap sheet  110  is attached to back core wrap sheet  120  as described previously. Outside of the plurality of channels  140 ,  150 ,  160 ,  170 , absorbent core  130  has a maximum thickness t. Preferably, each channel  140 ,  150 ,  160 ,  170  extends through at least 90% of the maximum thickness of absorbent core  130 , more preferably through 100% of the thickness of absorbent core  130 , such that, in the channel  140 ,  150 ,  160 ,  170 , substantially no absorbent material is present that between top core wrap sheet  110  and back core wrap sheet  120 . 
     Absorbent core  130  has a front portion  130   a  extending at one side of a transverse crotch line T, and a rear portion  130   b  extending at the other side of the transverse crotch line T. First, second, third and fourth channel  140 ,  150 ,  160 ,  170  each extend both in front portion  130   a  and rear portion  130   b  of absorbent core  130 . Preferably the distance d 12  between first and second channel  140 ,  150  is smaller than the distance d 34  between third and fourth channel  160 ,  170 , and the length  11  of first and second channel  140 ,  150  is bigger than the length  13  of third and fourth channel  160 ,  170 . Such a channel pattern has the advantage that liquid can be distributed over substantially the entire absorbent core  130 , and that any leakage risks in various positions of the wearer can be reduced. 
     The plurality of channels  140 ,  150 ,  160 ,  170  together cover at least 60%, preferably at least 70% of the length la of absorbent core  130 ; indeed, in the embodiment of  FIGS. 1A-1D  the channels cover a length equal to 11 which is more than 70% of the length la of absorbent core  130 . 
     The plurality of channels  140 ,  150 ,  160 ,  170  may be indicated in a color and/or with a pattern which is different from the color and/or pattern of topsheet. More in particular the area of the channels may comprise a print allowing a user to visually distinguish the channels. For example, an area of the topsheet above front portions of channels  140 ,  150 ,  160 ,  170  may be printed with an ink of a first color and an area of the topsheet above rear portions the channels  140 ,  150 ,  160 ,  170  may be printed with a different color. In that manner a user will be able to easily recognize the front and rear portion of a diaper, and will recognize more easily how to put on the diaper. 
     Topsheet, backsheet and absorbent core  130  may have the same features as described above in connection with  FIGS. 1A-1D . 
       FIG. 3  illustrates a variant of diaper  100  of  FIGS. 1A-1D . The features and characteristics are similar with this difference that a fifth channel  180  is provided in top core wrap sheet  110 , in between third and fourth channel  160 ,  170  and extending along a longitudinal center line of diaper  100 . Further, the first and second channels are slightly longer and extend over transverse fold line L in the direction of second transverse edge  134 . The third and fourth channel are slightly shorter compared to the embodiment of  FIGS. 1A-1D . By the additional channel  180  the distribution of the liquid can be further improved, especially for larger absorbent articles. 
       FIG. 4  illustrates a further variant of diaper  100  of  FIGS. 1A-1D . The features and characteristics are similar with this difference that the first and second channels are slightly longer and extend over transverse fold line L in the direction of second transverse edge  134 , in between third and fourth channel  160 ,  170 . Depending on the shape and size of the absorbent article, the distribution of the liquid and the creation of the cup/tub shape can be further improved by this additional length. 
       FIG. 5  illustrates a variant of diaper  100  of  FIG. 4 . The features and characteristics are similar with this difference that first channel  140  is connected to third channel  160  through a first transverse channel portion  147  and that second channel  150  is connected to fourth channel  170  through a second transverse channel portion  157 . In that manner any liquid can flow from the first channel  140  to the third channel  160  and vice versa, and liquid can flow from the second channel  150  to the fourth channel  170  and vice versa, resulting in an even better distribution of the liquid. Also, channel portions  147 ,  157  may help in creating the tub shape upon wetting of the absorbent core  130 . Preferably first and second channel  140 ,  150  extend in a longitudinal direction of absorbent core  130  over a length which is longer than the length of third and fourth channel  160 ,  170 , wherein third and fourth channel extend between crotch region CR and second transverse edge  134  and first and second channel extend between crotch region CR and first transverse edge  133 . 
       FIG. 6  illustrates another more basic exemplary embodiment of a diaper  100  according to the invention. Diaper  100  comprises a liquid pervious topsheet, a liquid impervious backsheet, and an absorbent core  130  positioned in between topsheet and backsheet. Absorbent core  130  has a first and second longitudinal edge  131 ,  132  and a first and second transverse edge  133 ,  134 . Absorbent article  100  is provided with a first and a second attachment zone for creating a first and a second channel  140 ,  150  located a distance d 12  of each other, upon wetting of the diaper  100 . First and second channel  140 ,  150  each extend from a crotch region CR in the direction of the first transverse edge  133  and the second transverse edge  134 . In this embodiment, preferably, first and second channel extend over more than 80% of the length of absorbent core  130 . Preferably the distance d 12  is between 10 mm and 90 mm, more preferably between 20 mm and 80 mm, even more preferably between 30 mm and 50 mm. Preferably, the length of the first and second channel is substantially the same, more preferably the length  11  of the first channel and the length  12  of the second channel is between 100 mm and 350 mm, more preferably between 150 mm and 300 mm. Preferably, the distance between the first channel  140  and the first longitudinal side  131  is between 10 mm and 30 mm, and the distance between the second channel  150  and the second longitudinal side  132  is between 10 mm and 30 mm. Preferably, the distance between the first/second channel  140 ,  150  and the transverse edges  133 ,  134  is between 20 mm and 100 mm, more preferably between 30 mm and 75 mm. 
     First channel  140  and second channel  150  are substantially parallel and run in the longitudinal direction of absorbent core  130 . However, it is also possible for first and second channel  140 ,  150  to extend under a small angle with respect to the longitudinal direction of absorbent core  130 , e.g. an angle between 5 and 10°. For example, first and second channel  140 ,  150  may be diverging slightly outwardly in the direction of first transverse edge  133  and may be diverging slightly outwardly in the direction of second transverse edge  134 . Preferably first channel  140  and second channel  150  are arranged symmetrically with respect to a longitudinal center line CL of absorbent core  130 . 
     First and second channel  140 ,  150  may each have a bottom  145 ,  155 , similar to the bottom illustrated in  FIG. 1C  for the first embodiment of  FIGS. 1A-1D . However, it is noted that the channels  140 ,  150 ,  160 ,  170  may be located below and/or above the attachment zones  145 ,  155 ,  165 ,  175 , as will be explained in more detail below with reference to  FIG. 14 . 
     At the attachment zones  145 ,  155 ,  165 ,  175  top core wrap sheet  110  is attached to back core wrap sheet  120  as described previously. Outside of the plurality of channels  140 ,  150 ,  160 ,  170  absorbent core  130  has a maximum thickness t. Preferably, in the unwetted state, each channel  140 ,  150 ,  160 ,  170  extends through at least 90% of the maximum thickness of absorbent core  130 , more preferably through 100% of the thickness of absorbent core  130 , such that, in the channel  140 ,  150 ,  160 ,  170 , substantially no absorbent material is present between top core wrap sheet  110  and back core wrap sheet  120 . 
     The areas of the channels  140  and/or  150  and/or  160  and/or  170  may be indicated in a color and/or with a pattern which is different from the color and/or pattern of topsheet. More in particular the area of the channels may comprise a print allowing a user to visually distinguish the channels. This print may be arranged on the topsheet, on the top core wrap sheet, on the back core wrap sheet, on the backsheet, or on any sheet in between the topsheet and the backsheet, as long as it is visible for a user. Preferably the print is visible when looking at the topsheet of the diaper. 
     For example, a front portion of the channel  140  and/or  150  and/or  160  and/or  170  may be indicated with an ink of a first color and a rear portion the channels  140  and/or  150  and/or  160  and/or  170  may be indicated with a different color. In that manner a user will be able to easily recognize the front and rear portion of a diaper. Indeed, the user will know that the first color has to be on the left and the second color on the right. Hence he will recognize more easily how to put on the diaper. 
     Topsheet, backsheet and absorbent core  130  may have the same features as described above in connection with  FIGS. 1A-1D . 
       FIGS. 7 and 8  illustrate baby pants variants of the baby diaper embodiments of  FIGS. 1A and 2A . In the embodiments of  FIGS. 7 and 8  the side panels  210 ,  210 ′ are larger compared to the embodiments of  FIGS. 1A and 2A . It is clear to the skilled person that any embodiment described in view of baby diapers, is applicable in a similar manner to baby pants, mutatis mutandis. 
       FIG. 10  illustrates an embodiment of a method for manufacturing an absorbent article according to the invention. In this embodiment, the attachment zone takes the form of a plurality of channels. The method comprises in a first step guiding a first sheet material  110  along an optional guide roller  5 , and further along a rotating member  10 . Binder may be applied to a first area on a first side of the first sheet material by a first means  51 , preferably before it arrives at the rotating member  10 . In a further step an absorbent material F is applied via a hopper  40  on said first sheet material  110  on the rotating member  10  such that the zones on which the first binder was applied  13 ,  13 ′ are covered with absorbent material and substantially no absorbent material is present on the areas where the first binder was not applied  11 ,  12 ;  11 ′,  12 ′. Separately from this process, a second binder is applied by means  52  to a second area on a first side of the second sheet material, wherein preferably the area to which the second binder is applied is chosen such that it will substantially complementary to the area to which the first binder is applied after assembly of the first and second sheet materials. In a further step the second sheet material  120  is applied on top of the absorbent material on the first sheet material  110 , e.g. using a further rotating member  20 . 
     One of said first and second sheet material is a top core wrap sheet material, and the other one is a back core wrap sheet material. In the illustrated embodiment it is assumed that the first sheet material  110  is the top core wrap sheet material. In a further step the first sheet material  110  is attached to the second sheet material  120  at least in the areas where substantially no absorbent material is present, and such that at least a first and a second liquid distribution zones, which in the example take the form of channels  140 ,  150 , are formed in said top core wrap sheet material  110 . 
     The attaching may be done by applying pressure and heat on the top core wrap sheet material  110  and/or on the back core wrap sheet material  120  in the areas where substantially no absorbent material is present, e.g. by a rotating member  30  and/or opposite rotating member  30 ′ which is provided with at least a first and a second seal rib  31 ,  32  dimensioned for applying pressure and heat on the top core wrap sheet material  110  in the areas where substantially no absorbent material is present in order to create the first and second channel  140 ,  150 , respectively. 
     An example of the application of the first and second binders and the assembling of the absorbent core is shown in  FIGS. 10A-10D . 
     In particular, taking as an example the possible manufacturing process for the embodiment of  FIGS. 1A and 1B , while the first sheet material  110  is being guided along an optional guide roller and further along a rotating member a binder, such as glue, may first be applied to the first sheet material, but only in substantially parallel stripes which do not overlap with the intended locations of the attachment zones  140 ,  150 ,  160 ,  170 . Note that in this embodiment, the first sheet material forms the bottom core wrap, but in other embodiments this can also be the top core wrap. The skilled person will be aware of various method of binder/glue application, such as spraying, contact application and so on. 
       FIG. 10A  shows a possible pattern for the application of glue to the first sheet material, which will be the back core wrap. In particular, in this example there are three stripes  111 ,  111 ′,  111 ″, but a different number of substantially parallel stripes, either continuous, intermittent and/or discontinuous in the longitudinal direction, may also be chosen depending on the shape and locations of the attachment zones  140 ,  150 ,  160 ,  170 , which preferably cover a substantial portion of the surface of the bottom core wrap while not overlapping with the intended location of the attachment zones, and preferably while keeping some distance from the intended location of the attachment zones. Although,  FIG. 10A  illustrates an application pattern of stripes, it is clear to the skilled person that the application pattern can be adapted and tuned depending on the intended shape, configuration and location of the one or more attachment zones. Moreover, the skilled person will know how to best adapt the binder application zones on the first and second sheet materials  110 ,  120  for other configurations of attachments zones, such as the ones described in the present application. Preferably, the application of the glue to the bottom core wrap takes place while the bottom core wrap is moved towards the rotating number, and before the absorbent material is added to it. In such a way, the sheet material on the rotating member is already provided with binder, and may subsequently have absorbent material attached thereto via the hopper. 
     Please note that the dotted line indicating the intended location of the attachment zones is there for illustrative purposes only: it does not correspond to anything on the first sheet material  110 . 
       FIG. 10B  shows application of glue to the second sheet material  120 , which in this case will become the top core wrap. In this case too the application of the binder preferably happens along substantially parallel stripes  121 ,  121 ′, which preferably are complementary to the stripes on the first sheet material  110 . Preferably, the application of glue to the top core wrap sheet happens at a distance from hopper  40 , to minimize the chance of contamination, i.e. absorbent material sticking to the areas that are to become attachment zones  140 ,  150 ,  160 ,  170 . For instance, the binder may be applied before or while the sheet material is guided along further rotating member  20 . Note that here, too, the dotted lines merely indicate the intended position of the attachment zones  140 ,  150 ,  160 ,  170 ; they do not indicate any interruption or change in the binder application. As before, the skilled person will be aware of various method of binder/glue application, such as spraying, contact application and so on. 
       FIG. 10C  shows the result. after the second sheet material  120 , which here is the top core wrap sheet, is applied on top of the absorbent material on the first sheet material  110 , e.g. using a further rotating member  20 . Note that the pattern fill indicates the presence of binder, and not the presence of absorbent material, since the absorbent material will not be present in the areas indicated by the dotted lines. These areas will be bonded together in a fourth step such as described above, such that channels  140 ,  150 ,  160  and  170  are formed in said back core wrap sheet materials  110  and/or  120 , for instance by applying pressure and heat on the back core wrap sheet material  110  and/or on the top core wrap sheet material  120  in the areas where substantially no absorbent material is present, e.g. by a rotating member  30  and/or opposite rotating member  30 ′ which is provided with at least a first and a second seal rib  31 ,  32  dimensioned for applying pressure and heat in between the core wrap sheet materials  110  and  120  in the areas where substantially no absorbent material is present in order to create the channels  140 ,  150 ,  160  and  170 . 
     Finally,  FIG. 10D  shows the absorbent article resulting from the above-described method, in which a further step has taken place of traversal sealing in bands  122 ,  122 ′ by chemical, thermal or physical binding such as for in stance glue, heat and/or pressure, which prevents the core from opening up and the front and the back. Note that this step of transversal sealing may also take place prior to the fourth step. 
     The above-described method may yield an absorbent article with higher dry and especially wet integrity and which avoids unwanted migration of absorbent material, while avoiding the risk of contamination in the attachment zones  140 ,  150 ,  160  and  170  which may impede the formation of channels. The skilled person will understand that this method is not limited to this particular configuration of attachment zones and will know how to best adapt the binder application zones on the first and second sheet materials  110 ,  120  for other configurations, such as the ones described in the present application. More in particular the skilled person understands that the method is also useful for absorbent cores with only one attachment zone or with more than two attachment zones. 
     Advantageously, suction may be used to apply the absorbent material. In particular a surface  15  of said rotating member  10  may be provided with a pattern with suction zones  13 ,  13 ′ and non-suction zones  11 ,  12 ;  11 ′,  12 ′. The first sheet material  110  is shown in  FIG. 10  in a transparent manner to reveal the suction and non-suction zones of the rotating member  10 . The suction zones  13 ,  13 ′ may be provided with holes, and the non-suction zones  11 ,  12 ;  11 ′,  12 ′ are formed of closed material. For example, the non-suction zones  11 ,  12 ;  11 ′,  12 ′ may be provided with inserts as shown in  FIG. 10E . As shown in  FIG. 10E , the inserts  11 ,  12 ;  11 ′,  12 ′, may have a trapezoidal cross section.  FIG. 10F  shows an insert pattern with four non-suction zones  11   a ,  11   b ,  12   a ,  12   b  per absorbent core. The inserts may be fixed e.g. with screws on the rotating member  10 . At an inner area of the rotating member  10  a vacuum is applied, see VACUUM  1  in  FIG. 10 . The non-suction zones  11 ,  12 ;  11 ′,  12 ′ comprise at least a first elongate zone  11 ,  11 ′ and a second elongate zone  12 ,  12 ′ extending in a circumferential direction of the rotating member  10 . This is shown also in  FIG. 10G  where a cross section through the absorbent core is shown during the application of the second sheet material  120 .  FIG. 10H  shows the cross section of the absorbent core downstream of rotating member  10 . 
     Use of suction as well as the first and second binder in combination has the advantage of ensuring both a strong bond between the layers and a desired distribution of absorbent material. 
       FIG. 11A  illustrates an exemplary embodiment of an absorbent core  130  with four attachment zones creating channels  140 ,  150 ,  160 ,  170 . In the embodiment of  FIG. 11A , the attachment zones are formed by welding the top core wrap sheet  110  to the back core wrap sheet  112 . This welding may be done according to a predetermined sealing pattern. In the embodiment of  FIG. 11A , the pattern consists of a plurality of discrete shapes  143 , here a plurality of squares. Preferably, the discrete shapes  143  have dimensions smaller than 2 mm. Preferably, the distance between adjacent discrete shapes is between 0.5 and 3 mm. 
       FIG. 11B  illustrates another exemplary embodiment of a sealing pattern that may be used in an embodiment of the invention. Here the pattern consists of a plurality of discrete shapes in the form of rounded elements  143 . The rounded elements may have a length dimension between 0.5 mm and 5 mm, and a width dimension between 0.5 mm and 5 mm. Preferably, the discrete shapes are equally distributed in the attachment zones. 
       FIG. 11C  illustrates yet another embodiment where the sealing pattern consists of discrete shapes which are rounded. In this embodiment, three columns of rounded discrete elements  143  are used for each attachment zone  140 ,  150 ,  160 ,  170 . 
       FIG. 11D  illustrates another exemplary embodiment of an attachment zone for creating a channel  140 ,  150 ,  160 ,  170 . In this embodiment, the attachment zone is formed by a plurality of continuous line-shaped attachments  140   a ,  140   b ,  140   c . The number of lines used may vary, and may be e.g. two lines or more than three adjacent lines. Preferably, the distance w between a first line  140   a  and a last line  140   c  is at least 1 mm, more preferably at least 2 mm, even more preferably more than 4 mm. 
     In the exemplary embodiment of  FIG. 11E , the attachment zones creating channels  140 ,  150 ,  160 ,  170  may be formed of a plurality of discrete elements  143 , wherein each discrete element has a width w which covers the entire width w of the attachment zone. 
       FIG. 13A  illustrates an exemplary embodiment of a traditional absorbent core. When a traditional absorbent core absorbs liquid, the core becomes bulky such that the diaper is no longer well adapted to the body. The liquid does not spread evenly but remains in the center of the absorbent core.  FIG. 13B  illustrates an exemplary embodiment of an absorbent core of the invention. Thanks to the attachment zones and associated channels  140 ,  150 ,  160 ,  170 , the liquid is evenly spread, resulting in the formation of tubes  301 ,  302 ,  303  which provide a tub shape to the absorbent core  130 . Such a tub shape adapts perfectly to the body. Further, compared to prior art solutions, the liquid is kept in an improved manner absorbed in the absorbent core  130 , and the risk on leakage is reduced. Also, because of the creation of the channels  140 ,  150 ,  160 ,  170 , the liquid is absorbed faster.  FIG. 12  shows a perspective view of a diaper in the wetted state.  FIG. 12  clearly illustrates the formation of three tubes  301 ,  302 ,  303  giving the diaper a tub shape which is well adapted to the body. 
       FIG. 14  illustrates an absorbent core  130  comprising an absorbent material  105  between a top core wrap sheet  110  and a back core wrap sheet  120 . The absorbent core has a first and second longitudinal edge  131 ,  132 . The absorbent core  130  is provided with a plurality of attachment zones  145 .  FIG. 14  illustrates that the attachment zones  145  may be positioned at different locations. As illustrated on the left in  FIG. 14 , the attachment zone may be positioned more or less centrally such that an upper channel portion  140   a  and a lower channel portion  140   b  is formed. In an alternative embodiment, the attachment zone  145  may be positioned at the bottom such that an upper channel  140  is created, see the example in the middle of  FIG. 14 . According to yet another embodiment, the attachment zone  145  may be located at the top, such that the channel  140  is formed below top core wrap sheet  110 . The skilled person understands that any variants thereof are also possible, as long as the attachment zones allow the formation of channels upon wetting of the absorbent core  130 . 
     Although the method is illustrated for two channels, the skilled person understands that the method can be adapted for forming three, four or more channels, and in particular for manufacturing any one of the absorbent articles disclosed in the present application. 
       FIGS. 15A-15X, 16A-16S, 17A-17V and 18A -F illustrate multiple advantageous positions for the attachment zones in an absorbent core according to the invention. 
     According to the exemplary embodiment of  FIG. 15A  the plurality of attachment zones comprises a first attachment zone  140 , a second attachment zone  150 , a third attachment zone  160  and a fourth attachment zone  170 , and a central attachment zone  180 . The first and second attachment zones  140  diverge from the central attachment zone  180  in the crotch region in the direction of a rear transverse edge of absorbent core. The third and fourth attachment zone  160 ,  170  diverge from the central attachment zone  180  in the crotch region in the direction of a front transverse edge of absorbent core. 
     According to the exemplary embodiment of  FIG. 15B  the plurality of attachment zones comprises a first attachment zone  140 , a second attachment zone  150 , a third attachment zone  160  and a fourth attachment zone  170 . This embodiment is similar to the embodiment of  FIG. 2A-2B , with this difference that the outer attachment zones  160 ,  170  are longer than the inner attachment zones  140 ,  150 . 
     According to the exemplary embodiment of  FIG. 15C  the plurality of attachment zones comprises a first attachment zone  140 , a second attachment zone  150 , a third attachment zone  160  and a fourth attachment zone  170 , and a central attachment zone  180 . The first and third attachment zones  140 ,  160  are aligned in the longitudinal direction. Also, the second and fourth attachment zones  150 ,  170  are aligned and extend substantially parallel to the first and third attachment zones  140 ,  160 . 
     According to the exemplary embodiment of  FIG. 15D  the plurality of attachment zones comprises a first attachment zone  140  and a second attachment zone  150 . The first and second attachment zones  140  are substantially parallel in the crotch region and diverge in the direction of a front transverse edge of absorbent core. 
     According to the exemplary embodiment of  FIG. 15E  the plurality of attachment zones comprises a first attachment zone  140  and a second attachment zone  150 . The first and second attachment zones  140  partially overlap in the crotch region and diverge in the direction of a front transverse edge of absorbent core. 
     According to the exemplary embodiment of  FIG. 15F  the plurality of attachment zones comprises a first longitudinal attachment zone  140  and a second longitudinal attachment zone  150  which are interconnected by an attachment portion  1045  in a front part of the absorbent core. In that manner any leakage via the front part can be reduced or avoided. 
     According to the exemplary embodiment of  FIG. 15G  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , and a transverse attachment zone  1045  in a front part of the absorbent core. The transverse attachment zone  1045  substantially connects a front end of first longitudinal attachment zone  140  and a front end of second longitudinal attachment zone  150   
     According to the exemplary embodiment of  FIG. 15H  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , a central longitudinal attachment zone  180 . The first and second longitudinal attachment zones  140 ,  150  extend adjacent to each other from the crotch region to a rear transverse edge of the absorbent core. 
     The central longitudinal attachment zone  180  extends from the crotch region in the direction of the front transverse edge of the absorbent core. 
     The exemplary embodiment of  FIG. 15I  is similar to the embodiment of  FIG. 15H , with this difference that the central attachment zone  180  extends also from the crotch region in the direction of the rear transverse edge, partially in between the first and second attachment zone  140 ,  150 . 
     According to the exemplary embodiment of  FIG. 15J  the plurality of attachment zones comprises a first longitudinal attachment zone  140  and a second longitudinal attachment zone  150  which are interconnected by an attachment portion  1045  in a front part of the absorbent core and an attachment portion  1045 ′ in a rear part of the absorbent core. In that manner any leakage via the front and rear part can be reduced or avoided. 
     According to the exemplary embodiment of  FIG. 15K  the plurality of attachment zones comprises a first attachment zone  140 , a second attachment zone  150 , a third attachment zone  160  and a fourth attachment zone  170 , and a central attachment zone  180 . The first and second attachment zones  140 ,  150  extend adjacent to each other from a crotch region in the direction the front transverse edge. Also, the third and fourth attachment zones  160 ,  170 , as well as the central attachment zone extend adjacent to each other from a crotch region in the direction the rear transverse edge. In that manner the distribution of liquid in the rear part of the absorbent core can be further enhanced. 
     According to the exemplary embodiment of  FIG. 15L  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , and a central longitudinal attachment zone  180 . The first and second longitudinal attachment zones  140 ,  150  extend adjacent to each other over at least 60% of the length of the absorbent core. The central longitudinal attachment zone  180  extends between the first and second attachment zones  140 ,  150 , from the crotch region in the direction of the rear transverse edge of the absorbent core. 
     According to the exemplary embodiment of  FIG. 15M  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , a central rear longitudinal attachment zone  180   a , and a central front longitudinal attachment zone  180   b . The first and second longitudinal attachment zones  140 ,  150  extend adjacent to each other over at least 60% of the length of the absorbent core. The central rear and front longitudinal attachment zones  180   a ,  180   b  extends between the first and second attachment zones  140 ,  150 , in a rear and front part of the absorbent core, respectively. 
     According to the exemplary embodiment of  FIG. 15N  the plurality of attachment zones comprises a first attachment zone  140 , a second attachment zone  150 , and a central attachment zone  180 . The first and second attachment zones  140  diverge from the crotch region in the direction of a front and rear transverse edge of absorbent core. The central attachment zone is provided in between the first and second attachment zone  140 ,  150 , mainly in a front portion of the absorbent core. 
     According to the exemplary embodiment of  FIG. 15O  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , and a central longitudinal attachment zone  180 . The first and second longitudinal attachment zones  140 ,  150  extend adjacent and parallel to each other in the crotch region. The central longitudinal attachment zone  180  extends between the first and second attachment zones  140 ,  150 , over at least 60% of the length of the absorbent core. 
     According to the exemplary embodiment of  FIG. 15P  the plurality of attachment zones comprises a first attachment zone  140  and a second attachment zone  150 . The first and second attachment zones  140 ,  150  extend from the crotch region in the direction of a front and rear transverse edge of absorbent core, and are curved such that the first and second attachment zones  140 ,  150  cross each other at a first crossing point in a front part of the absorbent core and in a second crossing point in the rear part of the absorbent core. 
     According to the exemplary embodiment of  FIG. 15Q  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , a third attachment longitudinal zone  160  and a fourth longitudinal attachment zone  170 . The first and second attachment zones  140 ,  150  extend from the crotch region in the direction of the rear transverse edge, and are interconnected via transverse attachment portions  147 ,  157  to third and fourth attachment zone  160 ,  170  extending from the crotch region to the front transverse edge, respectively. 
     The exemplary embodiment of  FIG. 15R  is similar to the embodiment of  FIG. 15G  with this difference that two parallel transverse attachment zones  1045   a  and  1045   b  are provided in the front region of the absorbent core. 
     According to the exemplary embodiment of  FIG. 15S  the plurality of attachment zones comprises a first attachment zone  140 , a second attachment zone  150 , a third attachment zone  160  and a fourth attachment zone  170 . The first and second attachment zones  140 ,  150  diverge from the crotch region in the direction of a front and rear transverse edge of absorbent core. The third and fourth attachment zones  160 ,  170  are located outwardly of the first and second attachment zones  140 ,  150 , are shorter than the first and second attachment zones  140 ,  150 , and also diverge from the crotch region in the direction of a front and rear transverse edge of absorbent core. In that manner, in the wetted state, a plurality of tubes is created, wherein the tubes are smaller in a center of the crotch region and gradually widen in the direction of the front and rear transverse edge of the absorbent core. In that manner the shape of the tub which is formed in the wetted state can be further improved to fit well to the body. 
     According to the exemplary embodiment of  FIG. 15T  the plurality of attachment zones comprises a first longitudinal attachment zone  140  and a second longitudinal attachment zone  150 , wherein front end portions  140 ′,  150 ′ thereof diverge in the direction of the front transverse edge of the absorbent core. 
     According to the exemplary embodiment of  FIG. 15U  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , a third longitudinal attachment zone  160  and a fourth longitudinal attachment zone  170 , and a central longitudinal attachment zone  180 . The first and second attachment zones  140 ,  150 , as well as the central attachment zone  180  extend adjacent to each other from a crotch region in the direction the front transverse edge. Also, the third and fourth attachment zones  160 ,  170  extend adjacent to each other from a crotch region in the direction the rear transverse edge. In that manner the distribution of liquid in the front part of the absorbent core can be further enhanced. 
     According to the exemplary embodiment of  FIG. 15V  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , and a central longitudinal attachment zone  180 . The first and second attachment zones  140 ,  150  extend adjacent to each other from a crotch region in the direction the front transverse edge. The central attachment zone  180  extends from a crotch region in the direction the rear transverse edge. 
     The exemplary embodiment of  FIG. 15W  is similar to the embodiment of  FIG. 15V  with this difference that the central attachment zone  180  extends partially in between the first and the second attachment zone  140 ,  150 . 
     The exemplary embodiment of  FIG. 15X  is similar to the embodiment of  FIG. 15V  with this difference that the central attachment zone  180  extends all the way in between the first and the second attachment zone  140 ,  150  in the direction of the front transverse edge. 
     According to the exemplary embodiment of  FIG. 16A  the plurality of attachment zones comprises a first attachment zone  140  and a second attachment zone  150 . The first and second attachment zones  140  are substantially parallel in a rear part of the crotch region, whilst the transverse distance between the first and second attachment zones gradually increases in the direction of a front transverse edge of absorbent core. 
     According to the exemplary embodiment of  FIG. 16B  the plurality of attachment zones comprises a first attachment zone  140  and a second attachment zone  150 . The first and second attachment zones  140  partially overlap in a rear part of the crotch region, whilst the transverse distance between the first and second attachment zones gradually increases in the direction of a front transverse edge of absorbent core. 
     According to the exemplary embodiment of  FIGS. 16C and 16D  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , a third attachment longitudinal zone  160  and a fourth longitudinal attachment zone  170 . The first and second attachment zones  140 ,  150  extend from the crotch region in the direction of the rear transverse edge, and are interconnected via transverse attachment portions  147 ,  157  to third and fourth attachment zone  160 ,  170  extending from the crotch region to the front transverse edge, respectively. In  FIG. 16C  the distance between the first and second attachment zones is smaller than the distance between the third and fourth attachment zones, whilst in  FIG. 16D  the distance between the first and second attachment zones is bigger than the distance between the third and fourth attachment zones. The embodiment of  FIG. 16E  is similar to the embodiment of  FIG. 16D  with this difference that the third and fourth attachment zones overlap in a front portion of the absorbent core. 
     The embodiment of  FIG. 16F  is similar to the embodiment of  FIG. 15U  with this difference that the third and fourth longitudinal attachment zones  160 ,  170  are interconnected at their rear end by a transverse attachment zone  1045 . 
     The embodiment of  FIG. 16G  is similar to the embodiment of  FIG. 15B  with this difference that the third and fourth longitudinal attachment zones  160 ,  170  have end portions which diverge outwardly in the direction of the front transverse edge and the rear transverse edge of the absorbent core. 
     The embodiment of  FIG. 16H  is similar to the embodiment of  FIG. 15O  with this difference that the first and second attachment zones  140 ,  150  have end portions which diverge outwardly in the direction of the front transverse edge and the rear transverse edge of the absorbent core. 
     The embodiment of  FIG. 16I  is similar to the embodiment of  FIG. 15C  with this difference that the first, second, third and fourth attachment zones  140 ,  150 ,  160 ,  170  are shorter such that in a central part of the crotch region only central attachment zone  180  is present. 
     The embodiment of  FIG. 16J  is similar to the embodiment of  FIG. 16I  with this difference that the two central attachment zones  180  are provided between first and third attachment zones  140 ,  160  and second and fourth attachment zones  150 ,  170 . 
     The embodiments of  FIGS. 16K and 16L  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , a third attachment longitudinal zone  160  and a fourth longitudinal attachment zone  170 . The first and second attachment zones  140 ,  150  extend from the crotch region in the direction of the front transverse edge. The third and fourth attachment zone  160 ,  170  extend from the crotch region to the rear transverse edge. The distance between the first and second attachment zones  140 ,  150  is bigger than the distance between the third and fourth attachment zones  160 ,  170 . In  FIG. 16K  the third and fourth attachment zones  160 ,  170  extend partially between the first and second attachment zones  140 ,  150 , whilst in  FIG. 16L , seen in the longitudinal direction, the third and fourth attachment zones  160 ,  170  are at a distance of the first and second attachment zones  140 ,  150 . 
     In the embodiments of  FIGS. 16M, 16N and 160  the plurality of attachment zones comprises a first longitudinal attachment zone  140 , a second longitudinal attachment zone  150 , and outwardly diverging attachment zones  160 ,  170  in a front portion of the absorbent core. In  FIG. 16M , additionally a central attachment zone  180  is provided between the first longitudinal attachment zone  140  and the second longitudinal attachment zone  150 . 
       FIG. 16P  is similar to the embodiment of  FIG. 16H  with this difference that first and second attachment zones are provided more to the front of absorbent core. 
     In the embodiment of  FIG. 16Q  the plurality of attachment zones comprises a first longitudinal attachment zone  140  and a second longitudinal attachment zone  150  which extend over at least 60% of the length of the absorbent core. The first longitudinal attachment zone  140  and the second longitudinal attachment zone  150  are each provided at a front end and at a rear end with an outwardly directed transverse portion. In that manner leakage risks at the front and rear parts of the absorbent core can be further reduced. 
       FIG. 16R  is similar to the embodiment of  FIG. 15B . 
     In the embodiment of  FIG. 16S  the plurality of attachment zones comprises a first undulated attachment zone  140  and a second undulated attachment zone  150  each extending over at least 60% of the length of the absorbent core. The undulations will increase the length of the channels  140 ,  150 , further improving the liquid distribution in the absorbent core. 
       FIGS. 17A-17V  and  FIGS. 18A-18G  illustrate yet other exemplary embodiments of an absorbent core according to the invention. 
       FIGS. 17A, 17B, 17H and 17K  illustrate that the first and second attachment zones  140 ,  150  may comprise curved portions.  FIGS. 17C, 17D, 17E, 17F, 17G, 17J, 17L, 17M, 17N, 170, 17P, 17Q, 17R, 17S, 17T, 17U, 17V  illustrate that various patterns are possible with one or more longitudinal sections  140 ,  150 ,  160 ,  170 ,  180 , and/or one or more inclined sections  160 ,  170 ,  160   a ,  160   b ,  170   a ,  170   b  and/or one or more transverse sections  1045 ,  1045   a ,  1045   b ,  1045   c .  FIG. 171  illustrates that also curved transverse sections  1045   a ,  1045   b  may be used. 
       FIGS. 18A-18G  illustrate further embodiments. In  FIG. 18A  the first to fourth attachment zones are similar to the first to fourth attachment zones of  FIG. 16I , but instead of a central rectilinear attachment zone, there is provided an oval attachment zone  180  in the crotch region, between the first and second attachment zone  140 ,  150  and the third and fourth attachment zone  160 ,  170 .  FIGS. 18B, 18C, 18D  illustrate that various patterns are possible with one or more longitudinal sections and/or one or more inclined sections and/or one or more transverse sections as described before.  FIGS. 18E, 18F, 18G  illustrate that the first and second attachment zones  140 ,  150  may comprise various rectilinear sections which are oriented at an angle with respect to the longitudinal direction of the absorbent core. 
       FIGS. 19A-19D  illustrate further embodiments wherein the absorbent core is provided with at least a first attachment zone  140 , wherein in said first attachment zone  141  said top core wrap sheet is attached to said back core wrap sheet along an attachment which extends, seen in a transverse and/or longitudinal direction of the absorbent core, over a transverse and/or longitudinal distance which is at least 1 mm, preferably at least 2 mm, more preferably at least 3 mm, most preferably at least 4 mm; and/or said top core wrap sheet is attached to said back core wrap sheet along a discontinuous attachment at a plurality of locations at a distance of each other, seen in the transverse and/or longitudinal direction of the absorbent core; such that upon wetting of the absorbent material, a first channel is created at said first attachment zone  140 . 
     In the embodiment of  FIG. 19A , a single longitudinal attachment zone  140  is illustrated, along with a first and second transversal attachment zone  1045   a ,  1045   b  which are positioned at either end of the longitudinal attachment zone  140 . The first and second transversal attachment zone  1045   a ,  1045   b  are illustrated as curved zones, but it is clear to the skilled person that the first and/or second transversal attachment zone may also be provided as straight zones. In the embodiment of  FIG. 19B , a single longitudinal attachment zone  140  is illustrated, along with a first and second transversal attachment zone  1045   a ,  1045   b  which are positioned between the attachment zone  140  and the first transversal edge of the absorbent core. In addition to, or alternative to the embodiment of  FIG. 19B  the first and second transversal attachment zones  1045   a ,  1045   b  may be positioned between the attachment zone  140  and the second transversal edge of the absorbent core. In other words, it is clear to the skilled person that e.g. a third and/or fourth transversal attachment zone may be added. In the embodiment of  FIG. 19C , a single longitudinal attachment zone  140  is illustrated, along with a first and second transversal attachment zone  1045   a ,  1045   b  which are positioned at either side of the longitudinal attachment zone  140 . Although the transversal attachment zones  1045   a ,  1045   b  are illustrated to be connected to the longitudinal attachment zone  140 , it is clear to the skilled person that other embodiments exist wherein the transversal attachment zones  1045   a ,  1045   b  are not connected to the longitudinal attachment zone  140 . In the embodiment of  FIG. 19D , a single longitudinal attachment zone  140  is illustrated. The illustrated longitudinal attachment zone  140  comprises curved sections, however, in addition or alternatively the longitudinal attachment zone  140  may comprise straight sections. It is clear to the skilled person that any of the earlier described embodiments related to at least two longitudinal attachment zones, or any combination thereof may be applied to the embodiments wherein the absorbent core comprises a single longitudinal attachment zone. 
     Since liquid may in many cases not be distributed evenly or symmetrically, it may be advantageous to include at least one attachment zone through which liquid may go from the first and second channels  140 ,  150  and vice-versa. This will allow a good distribution over the entire absorbent core as well as an improved formation of the channels and the tub-shape upon swelling of the absorbent core. 
     In the embodiments of  FIGS. 20A-20W, 20Z, 21G-21M, 210-21T, 21V-21X, 21Z, 22D-22M, 22R-22Z, 23A-23L , this is achieved with a transversal attachment zone  1045  connecting the front ends of longitudinal attachment zones  140 ,  150 . As will be clear from the figures, the presence of such a transversal attachment zone  1045  does not preclude the elements mentioned in conjunction with the previous figures, such as the presence of a central attachment zone  180  and/or variations of the length, position and/or shape of longitudinal attachment zones  140 ,  150 . The figures furthermore show that the presence of such a transversal attachment also does not preclude the presence of third and fourth longitudinal attachment zones  160 ,  170 , or of transversal attachment zones  147 ,  157  which connect the longitudinal attachment zones  140 ,  150  to the further longitudinal attachment zones  160 ,  170 . Furthermore, the figures show that the transversal attachment zone  1045  need not be straight: it may be rounded as in for example  FIGS. 20A-20D , rounded at the edges only as for example in  FIGS. 20E-20H , or take another shape. 
     In the embodiments of  FIGS. 20X-20Y , a transversal attachment zone  1045 ′ connects the back ends of longitudinal attachment zones  140 ,  150 . In the embodiments of  FIGS. 21A-21F, 220-22Q, 23M-23P , there are two transversal attachment zones  1045  and  1045 ′, respectively connecting the front and back ends of the longitudinal attachment zones  140 ,  150 ,  160 ,  170 . In the embodiments of  FIGS. 21N, 22N, 23U and 23V , there are two longitudinal attachment zones  140 ,  150  positioned toward the back side of the absorbent core which are connected by a transversal attachment zone  1045 ′ at their front ends, as well as two longitudinal attachment zones  160 ,  170  positioned toward the front side of the absorbent core which are connected by a transversal attachment zone  1045  at their back ends. 
     The connecting between the longitudinal channels need not be done with a transversal channel, but may also be achieved by shaping the longitudinal channels in a specific way. For example, in the embodiment of  FIG. 23R , the four longitudinal attachment zones  140 ,  150 ,  160 ,  170  collectively form a diamond shape. Likewise, in the embodiment of  FIG. 23T , six longitudinal attachment zones  140 ,  150 ,  160   a ,  170   a ,  160   b ,  170   c  are so connected as to form an elongated hexagon shape. Combinations of these two methods of connecting channels are also possible. In the embodiment of  FIG. 23Q , the longitudinal attachment zones  140 ,  150  are connected at their front ends by a transversal attachment zone  1045  and converge to meet at their back ends. In the embodiment of  FIG. 23S , longitudinal attachment zones  140  and  150  are connected by a transversal attachment zone  1045 , while longitudinal attachment zones  160 ,  170 , which are connected to zones  140 ,  150  respectively, converge at their back ends. The skilled person will be capable of envisaging other combinations and variations of the depicted embodiments. 
     The advantageous effect may be achieved even in cases wherein the longitudinal attachment zones are not directly connected, but merely approach each other in certain places. For example, in the embodiments of  FIG. 20Z, 21J, 21T , the front ends of longitudinal attachment zones  140 ,  150  are connected by transversal attachment zone  1045 , and the back ends of longitudinal attachment zones  160 ,  170  are shaped such that they approach one another. In other embodiments, such as the ones of  FIG. 21U, 21Y, 22A-22C , the longitudinal attachment zones  140 ,  150 ,  160 ,  170  approach one another either at the ends or along their path, and this may, depending on the specific configuration, be sufficient to allow for liquid to go from one channel to another. 
       FIGS. 25A-25Z  and  FIGS. 26A-26T  illustrate embodiments in which the dimensions of the longitudinal attachments zones  140 ,  150 ,  160 ,  170 ,  180  in the longitudinal direction have been reduced as compared to previously illustrated embodiments. Regarding the illustrated configurations of the shorter longitudinal attachments zones  140 ,  150 ,  160 ,  170 , central attachments zones  180 ,  180   a ,  180   b ,  180   c  and transversal attachment zones  1045 ,  1045   a ,  1045   b ,  1045   c  as illustrated in  FIGS. 25A-25Z  and  FIGS. 26A-26T , it is clear to the skilled person that the above described technical considerations and advantages in view of longer longitudinal attachments zones  140 ,  150 ,  160 ,  170 , central attachments zones  180 ,  180   a ,  180   b ,  180   c  and transversal attachment zones  1045 ,  1045   a ,  1045   b ,  1045   c  as illustrated in the previous figures apply in a similar way, mutatis mutandis. 
     In addition to the perspective view as shown in  FIG. 12 ,  FIGS. 24A-C  are photographs representing an absorbent article comprising an exemplary embodiment of an absorbent core of the invention.  FIG. 24A  illustrates the absorbent article when the absorbent core is in a dry state, whereas  FIGS. 24B and 24C  illustrate the absorbent article when the absorbent core is in a wetted state. In  FIG. 24A  attachments zones  140 ,  150 ,  160  and  170  wherein substantially no absorbent material is present, can be distinguished. However, in the illustrated photograph  24 A the attachment zones  140 ,  150 ,  160  and  170  have been slightly darkened in order to better illustrate the position thereof, since due to quality restraints of the photograph  24 A a part of this visual information has been lost.  FIGS. 24B and 24C  are photographs of the absorbent article in a wetted state, wherein tubes  301 ,  302 ,  303  have formed, which leads to the attachment zones  140 ,  150 ,  160  and  170  becoming more visible as channels. Thanks to the attachment zones and associated channels  140 ,  150 ,  160  and  170  the liquid is evenly spread, resulting in the formation of tubes  301 ,  302 ,  303  which provide a tub shape to the absorbent core  130 . Such a tub shape adapts perfectly to the body and can be seen, at least partially, in  FIG. 24C  where the absorbent article is not attached to a bottom surface at the corners of the absorbent article, which is the case in  FIGS. 24A and 24B . Further, compared to prior art solutions, the liquid is kept in an improved manner absorbed in the absorbent core  130 , and the risk on leakage is reduced. Also, because of the creation of the channels  140 ,  150 ,  160 ,  170 , the liquid is absorbed faster. 
     Whilst the principles of the invention have been set out above in connection with specific embodiments, it is to be understood that this description is merely made by way of example and not as a limitation of the scope of protection which is determined by the appended claims.