Abstract:
A pulpless core is provided with flexibility for superabsorbsnt expansion by using elastic strands stretched and coupled to a nonwoven layer, and then relaxed partially to create receiving valleys (puckers) and the puckers are provided with superabsorbent polymer, and then a layer of nonwoven or acquisition film can be coupled on top of nonwoven/elastic/sap carrier layers to create an absorbent core laminate.

Description:
RELATED APPLICATION 
       [0001]    This application claims the benefit of co-pending U.S. Provisional Patent Application Ser. No. 62/030, 911, filed 30 Jul. 2014 and also claims the benefit of co-pending U.S. Provisional Patent Application Ser. No. 62/077,418, filed 10 Nov. 2014. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    This invention relates to formation of pulpless absorbent cores for use in disposable products such as diapers and sanitary napkins. 
         [0003]    Sanitary napkins used in feminine hygiene are absorbent items worn by women to recover undesirable bodily discharges. These absorbent articles are typically comprised of an absorbent core sandwiched between layers of woven or non-woven materials. 
         [0004]    Generally, diapers comprise an absorbent insert or patch and a chassis, which, when the diaper is worn, supports the insert proximate a wearer&#39;s body. Additionally, diapers may include other various patches, such as tape tab patches, reusable fasteners and the like. The raw materials used in forming a representative insert are typically cellulose pulp, tissue paper, poly, nonwoven web, acquisition, and elastic, although application specific materials are sometimes utilized. Usually, most of the insert raw materials are provided in roil form, and unwound and applied in assembly line fashion. 
         [0005]    In the creation of a diaper (and, oftentimes also in conjunction with feminine hygiene products), multiple roll-fed web processes are typically utilized. 
         [0006]    To create an absorbent insert, the cellulose pulp is unwound from the provided raw material roll and pulverized by a pulp mill. Discrete pulp cores are formed, by a core forming assembly and placed on a continuous tissue web. Optionally, super-absorbent powder or polymer (SAP) may be added to the pulp core. The tissue web is wrapped around, the pulp core. The wrapped core is debulked by proceeding through a calendar unit, which at least partially compresses the core, thereby increasing its density and structural integrity. After debulking, the tissue-wrapped core is passed through a segregation or knife unit, where individual wrapped cores are cut. The cut cores are conveyed, at the proper pitch, or spacing, to a boundary compression unit. 
         [0007]    While the insert cores are being formed, other insert components are being prepared to be presented to the boundary compression unit. For instance, the poly sheet is prepared to receive a cut core. Like the cellulose pulp, poly sheet material is usually provided in roll form. The poly sheet is fed through a splicer and accumulator, coated with an adhesive in a predetermined pattern, and then presented to the boundary compression unit. In addition to the poly sheet, which may form the bottom of the insert, a two-ply top sheet may also be formed in parallel to the core formation. Representative plies are an acquisition web material and a nonwoven web material, both of which are fed from material rolls, through a splicer and accumulator. The plies are coated with adhesive, adhered together, cut to size, and presented to the boundary compression unit. Therefore, at the boundary compression unit, three components are provided for assembly: the poly bottom sheet, the core, and the two-ply top sheet. 
         [0008]    A representative boundary compression unit includes a die roller and a platen roller. When all three insert components are provided to the boundary compression unit, the nip of the rollers properly compresses the boundary of the insert. Thus, provided at the output of the boundary compression unit is a string of interconnected diaper inserts. The diaper inserts are then separated by an insert knife assembly and properly oriented. At this point, the completed, insert is ready for placement on a diaper chassis. 
         [0009]    A representative diaper chassis comprises nonwoven web material and support structure. The diaper support structure is generally elastic and may include leg elastic, waistband elastic and belly band elastic. The support structure is usually sandwiched between layers of the nonwoven web material, which is fed from material rolls, through splicers and accumulators. The chassis may also be provided with several patches, besides the absorbent insert. Representative patches include adhesive tape tabs and resealable closures. 
         [0010]    The process utilizes two main carrier webs; a nonwoven web which forms an inner liner web, and an outer web that forms an outwardly facing layer in the finished diaper. In a representative chassis process, the nonwoven web is slit at a slitter station by rotary knives along three lines, thereby forming four webs. One of the lines is on approximately the center line of the web and the other two lines are parallel to and spaced a short distance from the centerline. The effect of such slicing is twofold; first, to separate the nonwoven web into two inner diaper liners. One liner will become the inside of the front of the diaper, and the second liner will become the inside of the back of that garment. Second, two separate, relatively narrow strips are formed that, may be subsequently used to cover and entrap portions of the leg-hole elastics. The strips can be separated physically by an angularly disposed spreader roll and aligned laterally with their downstream target positions on the inner edges of the formed liners. 
         [0011]    After the nonwoven web is sliced, an adhesive is applied to the liners in a predetermined pattern in preparation to receive leg-hole elastic. The leg-hole elastic is applied to the liners and then covered with the narrow strips previously separated from the nonwoven web. Adhesive is applied to the outer web, which is then combined with the assembled inner webs having elastic thereon, thereby forming the diaper chassis. Next, after the elastic members have been, sandwiched between the inner and outer webs, an adhesive is applied to the chassis. The chassis is now ready to receive an insert. 
         [0012]    To assemble the final diaper product, the insert must, be combined with the chassis. The placement of the insert onto the chassis occurs on a placement arum or at a patch applicator. The inserts are provided to the chassis on the placement drum at a desired pitch or spacing. The generally flat chassis/insert combination is then folded so that the inner webs face each other, and the combination is trimmed. A sealer bonds the webs at appropriate locations prior to individual diapers being cut from the folded and sealed webs. 
         [0013]    Generally, disposable undergarments such as pants-type diapers are made up of two nonwoven layers of material with elastic strands of material placed between the two nonwoven layers of material thus creating an elastic web laminate. The layers of material are continuous sheets of material that are eventually cut into individual undergarment lengths. The elastic strands may be arranged and cut so that specific areas of the undergarment are free of elastic tension or forces. An absorbent pad, often contained within an insert or core is then also placed into the pants-type diaper product. 
         [0014]    To insure the pants-type diaper retains a proper shape and to hold all of the added layers of the diaper, reinforcing layers and backing materials are normally added to the continuous sheets of material, with the reinforcing layers corresponding to the cut elastic strands of each individual blank. Each of these layers needs to be adhesively joined at some point in the manufacturing process to the elastic web laminate to form the completed undergarment. 
         [0015]    Often, void spaces need to be created in the diaper, such as holes cut out of the main web for provided leg holes when the undergarment is ultimately formed. To create the void spaces, the web is ordinarily die cut, with the web severed between a die and an anvil. The portion of the web material that is removed, is referred to as a “chip.” As the die wears throughout time, the severing of the chip from the web material becomes gradually a duller cut. This complicates the removal of the chip because the severing might not create a continuous cut out chip, with possibly some strands of the web material still coupling the chip with the web. It is desired to lengthen the amount of time and increase the number of chips that a single die can effectively be used for, to reduce the number of die change-outs. 
         [0016]    Typically, the absorbent fibrous material is composed of cellulose wadding or cellulosic wood pulp material commonly referred to as “fluff”, although a mixture of natural and synthetic fibers is within the scope of the invention. An absorbent core composed of wood pulp fluff is typically formed by employing conventional air laying techniques. 
         [0017]    These absorbent cores have had their total absorbency improved greatly by the addition of super absorbent material, or super absorbent polymer (SAP) to the commonly used absorbent fibrous materials. 
         [0018]    The ability of these absorbent cores to manage the typical surges of liquid flow is heavily dependent on the proper distribution of super absorbent material within the absorbent fluff. When most super absorbent materials absorb aqueous fluids, they swell substantially, often to double their dry dimensions or more at saturation. As these super absorbent materials absorb fluid and swell, they generally become a gelatinous mass. 
         [0019]    There has been a trend in reducing the bulk of diapers, in attempts to make them more like underwear and to take up less shelf space in retailer&#39;s outlets. Generally, the thinner the diaper, the higher the concentration of super absorbent material required to produce the same level of absorbency. High levels of super absorbent material, however, tend to be more difficult to control and to maintain in position. 
         [0020]    In conventional core forming processes, three-dimensional fluff receiving pockets rotate about a vacuum drum. The pockets typically include baffles and screens which permit airflow through the pockets. The fluff is applied to the fluff receiving pockets entrained in air applied to the pockets. The vacuum attracts the fluff to a screen-like mesh that forms the pockets. The fluff is retained by the pockets, and the amount of fluff builds up from the screen forming the pocket. However, some fluff passes through the screen of the pockets and into the vacuum stream that is drawing the fluff into the pocket. Thus, some fluff undesirably becomes entrained in the vacuum stream. 
         [0021]    In conventional core forming process, it is desired to balance the amount of air urging the fluff towards the core forming pocket and the amount of vacuum used to retain the fluff within the pocket. Machine processes have become more complex as speeds of machines have increased, so air handling systems used in this process have greater demands placed on them. For instance, if the machine is running faster, pulp is required to be delivered to the core forming pocket quicker, necessitating a greater air flow to the pocket. To deliver more pulp to the pocket, more vacuum is required, to retain the pulp within the pocket. One complication is in achieving optimum balance between air in to the pocket and vacuum applied to the back side of the pocket. 
         [0022]    Imbalance between the amount of air supplying pulp to the core forming pocket and vacuum applied to the back of the pocket, holding the fluff in, causes puffs of fluff to escape forming chamber. Conventional core forming technology allows for limited adjustability to try and achieve the optimum balance between air in and vacuum. The largest air delivery is from fiberizing mill which supplies fluff and blows the fluff into the core forming chamber. 
         [0023]    Another source of air into forming process is from the dust collection equipment, which returns collected fluff from the vacuum stream to the core forming drum. Beginning with fluff that passes through the core forming pocket, the vacuum stream leads the fluff within the vacuum stream to the dust collection unit. A filter within the dust collection unit captures this fluff, this fluff is removed from the filter, and recirculated into the core forming process. Typically, this vacuum stream is fed into a drum filter housing, such as described in U.S. Pat. No. 5,679,136, commercial embodiments of which are available from the Osprey Corporation, and which is incorporated herein by reference. 
         [0024]    Pulpless cores are a recent development. In these embodiments, an absorbent core is formed without cellulosic fibers. It is known to use SAP with pockets created in a substrate (sometimes with vacuum), but formed pockets resist expansion with SAP expansion. 
       SUMMARY OF THE INVENTION 
       [0025]    This invention relates to a method and apparatus for forming an absorbent core or cores. More particularly, the cores of the present, invention, and methods for forming them, reduce or eliminate the absorbent fibrous material composed of cellulose wadding or cellulosic wood pulp material. The result is a pulpless core. 
         [0026]    The present invention allows the ability to extend in a channel created along the machine direction if desired. Once the SAP expands, the corrugations (rugosity) can be elongated out, and wasted SAP is avoided if the SAP not exposed to liquid. Wasted SAP can be also avoided by a better control of SAP delivery, such as gradient deposition or pattern deposition. In the current art the acquisition/distribution layer (ADL) is responsible for all the liquid distribution, but in the present invention, the core itself can assist with even liquid retention, acquisition and distribution to the core. 
         [0027]    A core is provided with flexibility for superabsorbent expansion by using elastic strands stretched and coupled to a preferably nonwoven layer, using elastic adhesive for example, and then the elastic/nonwoven combination is relaxed partially to still create receiving valleys (puckers) and these are filled with SAP and then a layer of nonwoven or acquisition film can be added on top of the elastic/nonwoven combination carrying SAP. The top nonwoven can be coupled to the elastic/nonwoven combination for instance by glue with core integrity adhesive. 
         [0028]    In the present invention, the core preferably has some stretch in either the machine or cross-machine direction, which can assist with the fit of the product. Inextensible cores do not stretch, but the present invention provides for controlled amount and directional, stretch as desired. The amount of stretch is fully adjustable by how much the elastic strands are initially stretched prior to coupling with a non-woven layer, and by how much the elastic/non-woven combination is relaxed. Additionally, directional stretch or patterned stretch can be provided by changing the elastic laydown pattern. 
         [0029]    An absorbent core material is disclosed comprising a first material layer; a series of elongated elastic strand members running in a machine direction and spaced apart in a cross-machine direction, said elongated elastic members coupled to said first material layer at a first tension of said elongated elastic strand members; a superabsorbent polymer material provided in gaps between adjacent elongated elastic members at a second tension of said elongated elastic strand members, said first tension greater than said second tension; a second material layer coupled to said elongated elastic members; said first material layer, said elastic members, said suberabsorbent polymer and said second material layer creating a stretchable absorbent core web. The de-tensioning of the elastic creates valleys or depressions in the first material layer which can capture the superabsorbent material, and when the second material layer is provided and coupled to the first material layer, the stretchable absorbent core web is formed. A first zone comprising said first material layer, said elastic members, said suberabsorbent polymer and said second material layer is disclosed; and a second zone comprising said first material layer coupled directly to said second material layer, said second zone substantially free of suberabsorbent polymer is disclosed. After formation of the stretchable absorbent core web, the stretchable absorbent core web can be severed into discrete core portions, and placed onto a diaper chassis, or incorporated into a diaper product or a different type of absorbent disposable product as desired. The 
         [0030]    superabsorbent polymer material can provided, intermittently in said machine direction to create a machine direction superabsorbent polymer gap, and at this gap can be where said absorbent core material is severed into discrete core portions. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0031]      FIGS. 1   a  and  1   b  are in process top and side views respectively, of a core forming process of the present invention, with a first nonwoven web receiving a plurality of elastic strands under tension; 
           [0032]      FIGS. 2   a  and  2   b  are in process top and side views respectively, showing a first tension let off of the elastic strands, to create peaks and valleys in the nonwoven; 
           [0033]      FIGS. 3   a  and  3   b  are in process top and side views respectively, showing a SAP distribution system applying SAP laid into the created peaks and valleys in the nonwoven; 
           [0034]      FIGS. 4   a  and  4   b  are in process top and side views respectively, showing a second nonwoven layer applied over the elastic strands and SAP filled peaks and valleys in the first nonwoven layer; 
           [0035]      FIG. 5  is a side view of the second nonwoven layer applied over the elastic strands and SAP filled peaks and valleys in the first nonwoven layer, showing a second tension let off of the elastic strands to create a continuous web of absorbent core material; 
           [0036]      FIG. 6  is a first alternate embodiment of an elastic strand deposition pattern onto the first nonwoven layer; 
           [0037]      FIG. 7  is a second alternate embodiment of an elastic strand deposition, pattern onto the first nonwoven layer; 
           [0038]      FIG. 8  is a cross sectional view of the second nonwoven layer applied over the elastic strands and SAP filled peaks and valleys in the first nonwoven layer, showing a second tension let off of the elastic strands, in an in use condition, for instance shaped as an absorbent core would be when a diaper is worn by a user; 
           [0039]      FIG. 9  is a top view of the second, nonwoven layer applied over the elastic strands and SAP filled peaks and valleys in the first nonwoven layer, showing a second tension let off of the elastic strands to create a continuous web of absorbent core material, the absorbent core rotated and placed on a receiver running web; 
           [0040]      FIG. 10  is a top view of a portion of a system for producing an absorbent core; 
           [0041]      FIG. 11  is a side view of the portion of the system shown in  FIG. 10 ; 
           [0042]      FIG. 12  is a side view of other portions of the system for producing an absorbent core shown in  FIG. 10 ; 
           [0043]      FIG. 13   a  is bottom view of a system for applying adhesive to a top nonwoven layer for use in creating an absorbent core; 
           [0044]      FIG. 13   b  is a bottom view of an alternate system for applying adhesive to a top nonwoven layer for use in creating an absorbent core; 
           [0045]      FIG. 13   c  is a top view of a SAP distribution system applying SAP in a preferred embodiment of SAP lanes to a base nonwoven layer coupled to elastic, strands; 
           [0046]      FIG. 13   d  is a top view of a SAP distribution system applying SAP in a second preferred embodiment of intermittent SAP lanes to a base nonwoven layer coupled to elastic strands; 
           [0047]      FIG. 14  is a side view of a roller/nip combination coupling a top nonwoven layer to elastic strands carried by a base nonwoven layer, the base nonwoven layer carrying SAP material; 
           [0048]      FIG. 15  is a cross sectional view of a top nonwoven layer coupled to elastic strands carried by a base nonwoven layer, the base nonwoven layer carrying SAP material to form an absorbent core laminate; 
           [0049]      FIG. 16  is a side view of a system for winding a top nonwoven layer coupled to elastic strands carried by a base nonwoven layer, the base nonwoven layer carrying SAP material to form an absorbent core laminate; 
           [0050]      FIG. 17  is a side view of a system for stacking a top nonwoven layer coupled to elastic strands carried by a base nonwoven layer, the base nonwoven layer carrying SAP material to form an absorbent core laminate; 
           [0051]      FIG. 18  is a perspective view of an absorbent core laminate. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0052]    Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structures. While the preferred embodiment has been described, the details may be changed without departing from the invention. 
         [0053]    In a preferred embodiment, creation of an absorbent core is accomplished by using two layers of nonwoven material  12  and  20 , sandwiching SAP  16  and elastic strands  14  between the two layers of nonwoven material  12  and  20 . However, in place of one or both of the nonwoven material layers  12  and  20 , other materials can be used, such as woven materials, elastic materials, or any other useful material. The invention is not limited to use of nonwoven material layers in creating the laminate. 
         [0054]    Referring now to  FIGS. 1   a  and  1   b,  in process top and side views respectively, of a core forming process of the present invention are shown. A first nonwoven web  12  receives a plurality of elastic strands  14  under tension. 
         [0055]    Referring now to  FIGS. 2   a  and  2   b,  a first tension let off of the elastic strands  14  is allowed, to create peaks and valleys (or puckers)  22  in the nonwoven  12 . Referring now to  FIGS. 3   a  and  3   b,  a SAP distribution system  19  applies SAP laid  16  into the created peaks and valleys  22  in the nonwoven  12 . The created peaks and valleys  22  act as pockets to carry the SAP  16 . SAP  16  can be laid continuously (not shown) or discontinuously as shown. The SAP  16  delivery methods can be vibratory, by dimple drum, timed delivery, or any other methods known in the art. Additionally, the coordination between the SAP  16  deposition and the timing and orientation of joining nonwoven layer  20  can vary between in a vertical SAP  16  drop into a gap between vertically running web  20  and combined web  12 / 16  through nips, or the SAP  16  can be deposited onto horizontally machine direction running web  12 / 16  so that the pockets  22  can be collecting SAP  16  prior to horizontal machine direction running web  20 . 
         [0056]    The dimensions of the puckers  22  are adjustable with different spacing or number of strands of elastic  14 . It may be desirable to vary the spacing and pucker size to allow higher or lower concentrations of SAP  16  in some sections of the diaper. The level of stretch in the strands  14  and the amount of relaxation before SAP  16  deposition can also change the pucker  22  dimensions. 
         [0057]    In a preferred embodiment, SAP  16  can be deposited on nonwoven layer  12  while web  12  is moving horizontally in the machine direction, and when the second nonwoven layer  20  is applied and coupled, the combined pulpless core web can move downstream in any desired fashion. 
         [0058]    Referring to  FIGS. 4   a  and  4   b,  a second nonwoven  20  layer is applied over the elastic strands  14  and SAP  16  filled peaks and valleys  22  in the first nonwoven layer  12 . As shown in  FIG. 5 , an alternate second tension let off of the elastic strands  14  create a continuous web of absorbent core material. The continuous web of absorbent core can then be processed as desired, for instance cut and placed onto a diaper chassis as individual cores, or rotated cut and placed as shown in  FIG. 9  onto a running carrier web  24  which itself can be further processed as desired. The second nonwoven layer  20  could alternatively be a layer of acquisition/distribution film (an ADL layer). Describing an intended diaper from the outside, one preferred embodiment is a nonwoven layer, a poly layer, a nonwoven with lycra (core wrap) layer, SAP, an additional nonwoven (top core wrap), an acquisition/distribution layer, and a topsheet layer. 
         [0059]    Referring still to  FIGS. 4   a  and  4   b,  SAP is shown deposited in areas where the elastic strands  14  reside, but outer channels of elastics  14  can be created that either do or do not contain SAP  16 , as desired. 
         [0060]      FIGS. 6 and 7  show first and second alternate embodiments of elastic strand  14  deposition patterns onto the first nonwoven layer  12 . In  FIG. 6 , the deposition is in the cross machine direction, and in  FIG. 7 , the deposition is in a curved fashion generally in the machine direction. The elastics  14  can be curved using curved or flared elastic deposition patterns as a method of tuning the absorption performance, and also to improve the fit and appearance of the final diaper product. The elastic deposition also provides control over the direction of elasticity of the core. 
         [0061]    Referring to  FIG. 8 , a cross sectional view of the second nonwoven  20  layer applied over the elastic strands  14  and SAP  16  filled peaks and valleys  22  in the first nonwoven layer  12 , shows a second tension let off of the elastic strands  14 , in an in use condition, for instance shaped as an absorbent core would be when a diaper is worn by a user. It is evident that the rugosities of the present invention desirably inhibit migration of SAP, for instance used beneficially in adult incontinent products. This feature could also increase the soft feel of the product, but in the current art, a thick ADL is needed to provide the soft feature of the product. The peaks and valleys or pockets  22  formed by the present invention minimized the tendency for the SAP  16  to accumulate through gravity to crotch area, the lowest portion of the core as shown. The elastic strands and its lamination with nonwoven in the middle of the core can better immobilize the SAP on its wet stage. 
         [0062]    The present invention may permit lower performance, less expensive, elastics to be used because the elastics and the cores formed thereby can hold a shape at body temperature. Less costly variations become possible e.g. lower decitex Spandex, plastomers or high copolymer olefins that are semi elastic. In place of or in addition to traditional elastics  14  as shown, ribbons, or films slit into ribbons or ribbonlike elements can be used in order to access these less costly technologies. The present invention can also use ultrasonic bonding to couple the layers (selecting Polypropylene as a blend component for example), or ultrasonic bonding can be used to trap elastic strands. 
         [0063]    The entire crotch area can be provided with elasticity, and when combined with a front and back stretch panel, results in an overall diaper product which provides elastic from end to end of the diaper product if desired. 
         [0064]    An additional embodiment (not shown), is that several layers of the absorbent core can be used. For instance, each layer might be designed, for a different level of absorbency, or have different directional zones in it. 
         [0065]    Additionally, a leg cuff could be built with into the core concept by stretching the outer strands of elastics  14  to a higher draw ratio than the central strands  14 , and then when the product is allowed, to spring back these strands of Lycra will raise up to make a bowl or boat shape without requiring a special apparatus and additional materials. 
         [0066]    Referring now to  FIG. 10 , a top view (and in  FIG. 11 , a side view) of a portion of a system for producing an absorbent core laminate  12 / 14 / 16 / 20  is shown. Adhesive applicator or applicators  32  apply adhesive preferably to elastic strands  14  (or to nonwoven layer  12 ) and adhesive strands  14  are brought into contact with nonwoven layer  12  by passing the strands  14  and nonwoven layer  12  over a roller  30 . Alternatively (not shown), a thermally compatible elastic  14  in strand or ribbon form can be used and ultrasonically bonded where desired. 
         [0067]    Referring now to  FIG. 12 , after the elastic  14  is coupled to the base nonwoven  12 , base nonwoven  12  is preferably slightly de-tensioned between roller  30  and roller  38 /nip  40  combination to accommodate receipt of SAP  16  by the base nonwoven  12  by creating a slight furrow for SAP  16 . 
         [0068]    Draw ratios of elastic  14  can be varied. A larger draw ratio could reduce SAP  16  level per unit of nonwoven  12 /elastic  14 , but when relaxed, the SAP  16  can be contained in a relatively small area to achieve a high effective concentration of SAP. On the other hand, a smaller draw ratio will increase SAP level per unit of nonwoven  12 /elastic  14 . In this case, a higher SAP doping rate is used to achieve a high effective concentration of SAP. Higher draw ratio may desirably give a softer feel to the composite and when lower draw ratio can also reduce the cost of manufacturing. By changing the draw ratio, the performance and cost balance can be easily adjusted. 
         [0069]    A SAP distribution system  34  applies SAP  16  to the base nonwoven  12 . Incoming top nonwoven layer  20  receives adhesive from adhesive distribution system  36 , and top nonwoven layer  20  is brought into contact with the base nonwoven  12  and elastic strand  14  combination at roller  38 /nip  40  combination to create an absorbent core laminate  12 / 14 / 16 / 20  which is passed downstream for further processing as desired, for example cutting/placing, stacking, or rolling. 
         [0070]    Referring now to  FIG. 13   a,  a bottom view of adhesive applicator  36  is shown, applying adhesive  43  in a pattern to the bottom of top nonwoven layer  20 . As shown in  FIG. 13   a,  the pattern can be substantially continuous across desired areas of top nonwoven layer  20 , or as shown in  FIG. 13   b,  adhesive  43  can be applied in a striped pattern to top nonwoven  20 . It may be desirable to apply adhesive  43  in a striped pattern to correlate to the spacing of elastic strands  14  carried by base nonwoven  12 . As the spacing and orientation of elastic strands  14  carried by base nonwoven  12  can vary in spacing, orientation and laydown pattern, so too can the pattern of adhesive  43  applied to top nonwoven  20 . 
         [0071]    Referring now to  FIG. 13   c,  a top view of a SAP distribution system  34  applying SAP  16  in a preferred embodiment of SAP  16  lanes to a base nonwoven layer  12  coupled to elastic strands  14  is shown, SAP  16  is received, from a source such as a fed hopper as shown in  FIG. 12 , and passed to void spaces  44  in the SAP distribution system  34  to allow SAP  16  to be applied to the base nonwoven  12 . A preferred SAP  16  laydown pattern is lanes or stripes as depicted in  FIG. 13   c,  and as shown in  FIG. 13   d,  these lanes can be intermittent SAP  16  lanes. Intermittent SAP  16  distribution is accomplished for example by interrupting the inbound flow of SAP  16 , or by removing intermittently portions of the flow of SAP  16 . 
         [0072]    By forming puckers, channels or lanes in the core with SAP  16 , retention, acquisition and distribution of liquid, is assisted. In an alternative embodiment, alternating patterns or divergent, patters of channels or lanes of SAP can be created by heavy and light SAP  16  distribution levels. This also enhances the distribution performance of the core and allows for the performance to be tailored according to the desired usage. In this manner, elastic strand  14  spacing can be alternated with heavy SAP  16  lanes adjacent to light SAP  16  lanes that can channel the liquid in a desired pattern. 
         [0073]    The present invention allows for use of a thinner ADL layer because the contracted core is corrugated and can store liquid. The ADL layer can be allowed to contract with the absorbent core laminate  12 / 14 / 16 / 20  and the result is a fully elastic core in zones where elastification is desired. 
         [0074]    For a higher dosage of SAP  16 , larger (or longer) void spaces  44  and feed rate can be used. Likewise, for a lower dosage of SAP  16 , smaller void spaces  44  and feed rates can be used. 
         [0075]    Referring now to  FIG. 14 , once SAP  16  has been applied to the base nonwoven layer  12 , and adhesive  43  has been applied, in a pattern to the bottom, of top nonwoven layer  20 , the materials of the absorbent core laminate  12 / 14 / 16 / 20  are brought together by nip wheel  38  urging the top nonwoven  20  carrying adhesive  43  against elastic strands  14 . Base nonwoven  12  is carried by ridged nip wheel  40 . In a preferred embodiment, peaks  46  of the ridged nip wheel  40  carry base nonwoven  12  and elastic strands  14 , and the elastic strands  14  carried by base nonwoven  12  are urged into contact with top nonwoven  20 . Valleys  42  of the ridged nip wheel  40  allow SAP  16  a position to migrate during compression of the materials of the absorbent core laminate  12 / 14 / 16 / 20  and coupling of the top nonwoven  20  to elastic strands  14 . SAP  16  accumulates in the valleys  42 . As shown in  FIG. 15 , an absorbent core laminate  12 / 14 / 16 / 20  is formed, with SAP  16  remaining captured in pockets, to create an absorbent core laminate  12 / 14 / 16 / 20  as shown in  FIG. 18 . 
         [0076]    After creation of the absorbent core laminate  12 / 14 / 16 / 20 , laminate is passed, downstream for further processing as desired. This can include winding to create a roll  50  of absorbent core laminate  12 / 14 / 16 / 20  as shown in  FIG. 16 , cutting and stacking of absorbent core laminate  12 / 14 / 16 / 20  as shown in  FIG. 17 . Referring to  FIG. 17  in particular, is a side view of a system for stacking a top nonwoven layer coupled to elastic strands carried by a base nonwoven layer, the base nonwoven layer carrying SAP material to form an absorbent core laminate is shown. A stack  52  of discrete absorbent core laminate  12 / 14 / 16 / 20  pieces can be assembled for packaging. 
         [0077]    Preferably, absorbent core laminate  12 / 14 / 16 / 20  is cut and placed, and this cutting and placing can take any fashion such as traditional cores are variably placed in disposable product construction. For instance, the formed absorbent core laminate  12 / 14 / 16 / 20  can be situated adjacent to an acquisition/distribution (ADL) layer (not shown). 
         [0078]    The foregoing is considered as illustrative only of the principles of the invention. Furthermore, since numerous modifications and changes will readily occur to those skilled, in the art, it is not desired to limit the invention to the exact construction and operation shown and described. While the preferred embodiment has been described, the details may be changed without departing from the invention, which is defined by the claims.