Abstract:
In order to achieve both ease of removal and an increase in the rate of impregnation by a predetermined chemical, in this packaging structure of a package of wet wipes, a convex region is formed at a position containing a region that faces the opening of a main package body and that is on the upper surface of a stacked body of wet wipes. The convex region is formed protruding towards the main package body. A space is formed between the region (corresponding to the ends) aside from the convex region formed on the wet wipes and the upper surface to which the opening of the main package body is provided.

Description:
RELATED APPLICATIONS 
     The present application is a National Phase of International Application Number PCT/JP2011/071226, filed Sep. 16, 2011, and claims priority from Japanese Application Number 2010-223248, filed Sep. 30, 2010. 
     TECHNICAL FIELD 
     The present invention relates to a package structure of wet wipes. 
     BACKGROUND ART 
     As a method for manufacturing wet wipes formed of a laminated body of sheets impregnated with a predetermined chemical, there are known methods disclosed in Patent Literatures 1 and 2. 
     A method disclosed in Patent Literature 1 has: a step of impregnating an original fabric with part of a predetermined chemical during conveyance of the original fabric before lamination; a step of squeezing out an excess of the predetermined chemical impregnated in the original fabric during conveyance of the original fabric; a step of laminating a plurality of original fabrics during conveyance of the original fabrics; and a step of impregnating the original fabrics with the rest of the predetermined chemical during conveyance of the original fabrics after lamination. 
     Furthermore, a method disclosed in Patent Literature 2 has: a step of impregnating an original fabric with a chemical during conveyance of the original fabric before lamination; a step of laminating the original fabric while folding it back during conveyance of the original fabric; a step of conveying the original fabric after lamination while compressing it in a thickness direction and thereafter cutting the original fabric; and the like. 
     A package structure of the wet wipes manufactured by the methods disclosed in Patent Literatures 1 and 2 has a configuration of a so-called pop-up type that when one sheet is taken out of a container, the next one is also pulled out together and protruded from an outlet of the container. 
     CITATION LIST 
     Patent Literature  
     Patent Literature 1: Japanese Patent Publication No. H7-204118 
     Patent Literature 2: Japanese Patent Publication No. 2007-144053 
     SUMMARY OF INVENTION 
     However, the applicants found that the pop-up type package structure has room for improvement because if an impregnation rate of a predetermined chemical to an original fabric is increased or weight of the original fabric is increased, the original fabrics are interconnected by means of a water screen of the predetermined chemical, which makes it difficult to take sheets out one by one from a package body packaging a container or laminated body. 
     Thus, it is an object of the present invention to provide a package structure of wet wipes, which is capable of achieving both increase of the impregnation rate of a predetermined chemical and the easiness of taking sheets out. 
     A feature of the present invention is summarized as a package structure that contains wet wipes formed of a laminated body of sheets impregnated with a predetermined chemical, inside a package main body, the package structure wherein: the package main body is provided with an opening portion through which the sheets are taken out; in the wet wipes, a convex region protruded toward a surface provided with the opening portion, is formed in a region including a region facing to the opening portion; and in an unopened state in which the opening portion is unopened, a space is formed between the surface provided with the opening portion of the package main body and a region other than the convex region. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a package body of wet wipes according to a first embodiment of the present invention. 
         FIG. 2  is a view for showing a state in which the wet wipes according to the first embodiment of the present invention are contained inside the package body. 
         FIG. 3  is a view for showing a state in which the wet wipes according to the first embodiment of the present invention are contained inside the package body. 
         FIG. 4  is a perspective view for illustrating a package structure of the wet wipes according to the first embodiment of the present invention. 
         FIG. 5  is a cross-sectional view for illustrating the package structure of the wet wipes according to the first embodiment of the present invention. 
         FIG. 6  is a schematic view of a manufacturing apparatus for manufacturing the package structure according to the first embodiment of the present invention. 
         FIG. 7  is a view for illustrating a device used in a laminating step and a pressing step of the manufacturing apparatus for manufacturing the package structure according to the first embodiment of the present invention. 
         FIG. 8  is a view for illustrating a configuration of a pressing device for manufacturing the package structure according to the first embodiment of the present invention. 
         FIG. 9  is a simplified view for illustrating a state in which a sheet is taken out in the package structure according to the first embodiment of the present invention. 
         FIG. 10  is a simplified view for illustrating a state in which a sheet is taken out in a conventional package structure. 
         FIG. 11(   a ) shows results of a taking-out test for a package body to which the pressing step was not performed by the pressing device;  FIG. 11(   b ) shows results of a taking-out test for a package body in which the entire surface of a laminated body was pressed; and  FIG. 11(   c ) shows results of a taking-out test for a package body to which the pressing step was performed by the pressing device according to the embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     First Embodiment of Present Invention 
     With reference to  FIGS. 1 to 3 , wet wipes manufactured by a manufacturing apparatus  10  according to a first embodiment of the present invention are explained. Such wet wipes are formed of a laminated body of sheets  710 ,  720  impregnated with a predetermined chemical. 
     As shown in  FIG. 1 , a package body  100  of the wet wipes has: a package main body  20  having an opening portion  21 ; a label member  22  attached to the exterior face of the package main body  20  to cover the opening portion  21 ; and a laminated body  800  (see,  FIGS. 4 and 5 ) of the sheets  710 ,  720  contained inside the package main body  20 . 
     Each of the sheets  710 ,  720  is contained inside the package main body  20  in a state where these sheets are folded back as shown in  FIGS. 2 and 3 . 
     As shown in  FIGS. 2 and 3 , the sheet  720  has regions  31 A,  32 A,  33 A,  34 A,  35 A, whereas the sheet  710  has regions  31 B,  32 B,  33 B,  34 B,  35 B. 
     Herein, in the sheet  720 , the regions  31 A,  32 A are folded back along a folding line  1 A; the regions  32 A,  33 A are folded back along a folding line  2 A; the regions  33 A,  34 A are folded back along a folding line  3 A; and the regions  34 A,  35 A are folded back along a folding line  4 A. 
     Similarly, in the sheet  710 , the regions  31 B,  32 B are folded back along a folding line  1 B; the regions  32 A,  33 A are folded back along a folding line  2 B; the regions  33 A,  34 A are folded back along a folding line  3 B; and the regions  34 A,  35 A are folded back along a folding line  4 B. 
     Note that in the sheet  720 , the folding lines  1 A,  2 A are provided between the folding lines  3 A,  4 A in a widthwise direction W, whereas in the sheet  710 , the folding lines  1 B,  2 B are provided between the folding lines  3 B,  4 B in the widthwise direction W. 
     That is, in the sheet  720 , a region between the folding lines  1 A,  2 A in the widthwise direction W has a four-layered structure formed by folding back the regions  31 A,  32 A,  33 A,  34 A, whereas the other region has a two-layered structure formed by folding back the regions  33 A,  34 A. 
     Therefore, the regions  31 A,  32 A rise in a lamination direction S of the laminated body while extending in one direction L of the laminated body. 
     That is, the regions  31 A,  32 A are folded back along the folding lines  1 A,  2 A to thereby configure a rising region PA which is formed in the laminated body so as to rise in the lamination direction S while extending in the one direction L. 
     Similarly, in the sheet  710 , a region between the folding lines  1 B,  2 B in the widthwise direction W has a four-layered structure formed by folding back the regions  31 B,  32 B,  33 B,  34 B, whereas the other region has a two-layered structure formed by folding back the regions  33 B,  34 B. 
     Therefore, the regions  31 B,  32 B rise in a lamination direction S of the laminated body while extending in the one direction L of the laminated body. 
     That is, the regions  31 B,  32 B are folded back along the folding lines  1 B,  2 B to thereby configure a rising region PB which is formed in the laminated body so as to rise in the lamination direction S while extending in the longitudinal direction L. 
     Furthermore, one region (that is, the rising region PA) between the folding lines  1 A,  2 A in the widthwise direction W is arranged so as not to be overlapped with the other region (that is, the rising region PB) between the folding lines  1 B,  2 B in the direction W. 
     Furthermore, in the rising regions PA, PB, the sheets  710 ,  720  adjacent to each other in the lamination direction S are laminated in close contact with each other with a predetermined chemical intervened therebetween. 
     Herein, in regions RA, RB, RC adjacent to the rising regions PA, PB, since a gap is formed between the sheets  710 ,  720  adjacent to each other in the lamination direction S, these sheets are not laminated in close contact with each other with the predetermined chemical intervened therebetween. 
     Note that the wet wipes manufactured with the manufacturing apparatus  10  according to the first embodiment of the present invention are not configured as the aforementioned pop-up type. Therefore, even in a case where the sheet  720  is taken out through the opening portion  21  of the package main body  20 , the sheet  710  is not pulled up together to be protruded from the opening portion  21 . 
     That is, after taking out the sheet  720  through the opening portion  21  of the package main body  20  by grabbing and pulling up the regions  31 A,  32 A (that is, the rising region PA of the sheet  720 ), a user can take out the sheet  710  by grabbing and pulling up the regions  31 B,  32 B (that is, the rising region PB of the sheet  710 ). 
     As shown in  FIGS. 4 and 5 , a package structure of the package body  100  is configured as follows. A convex region T is formed in a position including a region facing to the opening portion  21  of the package main body  20  at the upper face side of the laminated body  800  of wet wipes. The convex region T is formed so as to be protruded toward the package main body  20 . The convex region T corresponds to a central region  800 C to be described later. 
     In an unopened state in which the opening portion is unopened, a space S is formed between an upper surface  20   a  provided with the opening portion  21  of the package main body  20  and a region (corresponding to end portions  800 A,  800 B to be described later) other than the convex region T formed in wet wipes. 
     Herein, the “unopened state” includes a state in which the package body  100  is on sale. This state also includes a state before the label member  22  is first removed to open by a user. Furthermore, even after the user removes the label member  22 , a state before the sheets  710 ,  720  are taken out from the inside of the package main body  20  is included in the “unopened state”. Yet further, a state after the predetermined number of sheets  710 ,  720  are taken out is also included in the “unopened state”. 
     The “unopened state” also includes a state in which a thickness of the convex region T of the laminated body  800  contained inside the package main body  20  is approximately equal to a length of the package main body  20  corresponding to a lamination direction of the sheets  710 ,  720 . 
     The convex region T extends in a longitudinal direction L or short direction (that is, a widthwise direction W) of the package body  100  of wet wipes. In the package structure of the package body  100  of wet wipes according to the present embodiment, the convex region T extends in the longitudinal direction L and comes in contact with a partial region  20   ab  other than the opening portion  21  of the package main body  20  (see,  FIG. 4 ). 
     Hereinafter, with reference to  FIGS. 6 to 8 , a manufacturing method for realizing the package structure of wet wipes according to the present embodiment is briefly explained. 
     As shown in  FIG. 6 , in step S 101 , the folding unit  5  folds respective sheets  71 ,  72  having been sent out from a wound state in a roller shape, into a predetermined shape (specifically, a shape shown in  FIGS. 2 and 3 ) on a side not in contact with a conveyance device. 
     For example, the sheets  71 ,  72  have a basis weight of 25 g/m 2  to 100 g/m 2 , and are made of; fibers made of a hydrophilic fiber such as rayon, cotton, or pulp, and a simple substance such as PET, PP, PE, or acrylic; or hydrophobic composite fibers having a sheath-core structure or a side-by-side structure. 
     Furthermore, the sheets  71 ,  72  are a nonwoven fabric shaped in a sheet-like form by a spun lace method, an air-laid method, a direct spinning method, or the like, and these sheets are required to include a hydrophilic fiber in terms of permeability of the predetermined chemical at the time of impregnation of the predetermined chemical. 
     In step S 102 , an impregnating unit  1  impregnates each of the folded sheets  71 ,  72  with a predetermined amount of predetermined chemical from a side in contact with the conveyance device (a side of a conveyance roller  2 ). 
     In step S 103 , each of the sheets  71 ,  72  impregnated with the predetermined chemical is conveyed in contact with the surface of the conveyance roller  2 . 
     In step S 104 , a conveyer  3  laminates each of the sheets  71 ,  72  impregnated with the predetermined chemical. 
     Specifically, with the conveyer  3 , the sheet  72  with its surface impregnated with the predetermined chemical being faced to the side in contact with the conveyance device is laminated from the side not in contact with the conveyance device, on the sheet  71  with its surface impregnated with the predetermined chemical being faced to the side in contact with the conveyance device. 
     In step S 105 , a cutting unit  4  cuts the sheets  71 ,  72  conveyed by the conveyer  3 , into the sheets  710 ,  720  with a predetermined size. 
     Thereafter, after a laminated body  800  formed by laminating a predetermined number of the cut-out sheets  710 ,  720  is obtained in laminating step S 106 , the laminated body  800  is conveyed in pressing step S 107  while both outer end portions in the widthwise direction of the laminated body  800  formed of the cut-out sheets  710 ,  720  are pressed from a side not in contact with the conveyer  14 . In packaging step S 108 , the laminated body  800  is packaged in the package main body  20 . 
     Hereinafter, with reference to  FIGS. 6 to 8 , each function of the manufacturing apparatus  10  according to the present embodiment is explained. 
     As shown in  FIG. 4 , the manufacturing apparatus  10  has: the folding unit  5 ; the impregnating unit  1 ; the conveyance roller  2 ; conveyors  3 ,  9 ,  11 ,  12 ; the cutting unit  4 ; the pusher  13 ; and a pressing device  15 . Herein, in the manufacturing apparatus  10 , the conveyance roller  2  and the conveyors  3 ,  9  make up a conveyance device configured to continuously convey the plurality of sheets  71 ,  72 . Furthermore, the conveyers  11 ,  12 ,  14  make up a conveyance device configured to continuously convey the sheet bundles  800 . 
     The folding unit  5  is configured to fold back each of the sheets  71 ,  72  on a side not in contact with the conveyance device. Specifically, the folding unit  5  is configured to fold back each of the sheets  71 ,  72  so that the sheets  71 ,  72  are formed in a shape shown in  FIGS. 2 and 3 . 
     Specifically, the folding unit  5  is configured so that: the regions  31 A,  32 A,  33 A (or  31 B,  32 B,  33 B) including one side edge of the sheet  72  (or  71 ) are folded back on a side not in contact with the conveyance device, along the folding line  3 A (or  3 B) in the conveyance direction MD; thereafter the regions  31 A,  32 A (or  31 B,  32 B) including one side edge of the sheet  72  (or  71 ) are folded back on the side not in contact with the conveyance device, along the folding line  2 A (or  2 B) in the conveyance direction MD; and thereafter, the region  31 A (or  31 B) including one side edge of the sheet  72  (or  71 ) is folded back on the side not in contact with the conveyance device, along the folding line  1 A (or  1 B) in the conveyance direction MD. 
     Furthermore, the folding unit  5  is configured so that the region  35 A (or  35 B) including the other side edge of the sheet  72  (or  71 ) is folded back on a side in contact with the conveyance device, along the folding line  4 A (or  4 B) in the conveyance direction MD. 
     The impregnating unit  1  is configured to impregnate each of the folded sheets  71 ,  72  with the predetermined chemical, from the side in contact with the conveyance device. 
     For example, the impregnating unit  1  may be configured to push out the predetermined chemical by a predetermined amount from a chemical tank by using a proportioning pump. As a result, the predetermined amount of predetermined chemical is discharged from a pore provided in the impregnating unit  1  and comes in contact with the sheets  71 ,  72 , so that each of the sheets  71 ,  72  is impregnated with the predetermined amount of predetermined chemical. 
     Furthermore, the impregnating unit  1  may be configured to impregnate the sheets  71 ,  72  with the predetermined chemical having weight of 3.5 (between 3 and 4) times heavier than the sheets  71 ,  72 , for example. 
     Note that a weight rate (that is, an impregnation rate) of the predetermined chemical to be impregnated, with respect to the sheets  71 ,  72  is appropriately adjustable by the impregnating unit  1 . 
     Herein, an impregnation rate required for the sheets  71 ,  72  to adhere to the surface of the conveyance roller  2  and for the sheet  72  to adhere to the top of the sheet  71  is 1.5 times or more in a case of using as the sheets  71 ,  72 , a spun lace nonwoven fabric of 38 g/m 2  having a rayon fiber as a main constituent, for example. 
     Furthermore, as a method for applying a predetermined chemical, the impregnating unit  1  may adopt a method for attaching a predetermined chemical in a droplet form or in a mist form to the sheets  71 ,  72 . However, the above-described method is preferable in consideration of impregnation efficiency and process pollution of chemical at the time when surfaces of the sheets  71 ,  72 , which are impregnated with the predetermined chemical, are brought in contact with the surface of the conveyance roller  2 . 
     The conveyance roller  2  is connected to a driving source and is a driving roller with a smooth surface, configured to rotate by itself. 
     The conveyor  3  is configured to convey each of the sheets  71 ,  72  at an approximately equal conveyance speed to the conveyance roller  2 . 
     The cutting unit  4  is configured to cut the laminated body formed by laminating the plurality of sheets  71 ,  72  in a state where the sheets  71 ,  72  impregnated with the predetermined chemical are folded back. For example, the cutting unit  4  is configured so that a cutter roller having a cutting blade on its surface and an anvil roller having a smooth surface cut the plurality of continuously-conveyed sheets at a predetermined interval in a direction perpendicular to the conveyance direction. 
     Furthermore, like the conveyor  3 , the conveyor  9  may be provided at both the upside and downside. In such a case, the laminated body of the sheets  710 ,  720  is conveyed while being sandwiched between an upper conveyer arranged at the upside and a lower conveyer arranged at the downside. This upper conveyor may be provided with a concave portion and a convex portion. 
     As a result, the laminated body of the sheets  710 ,  720  after being cut by the cutting unit  4  is improved in its transfer ability and conveyance stability with respect to the conveyer  9 . 
     Herein, a conveyance speed of the conveyor  9  is 3% higher than the conveyor  3  and the cutting unit  4 . 
     The conveyer  11  has conveyers  11   a ,  11   b  arranged at a predetermined interval in a cross direction CD intersecting with the conveyance direction MD. The conveyers  11   a ,  11   b  are provided with a suction mechanism (not shown) to enable the cut-out sheets  710 ,  720  conveyed by the conveyer  9  to be conveyed with their outer ends in the widthwise direction being adsorbed to the conveyance surface. The pusher  13  is arranged between the conveyers  11   a ,  11   b.    
     The pusher  13  is arranged movably in a direction of pushing down the sheets  710 ,  720  conveyed by the conveyer  11 , that is, in a direction of detaching the sheets  710 ,  720  from the conveyance surfaces of the conveyers  11   a ,  11   b.    
     After the laminated body  800  is formed by laminating the predetermined number of sheets  710 ,  720  detached from the conveyers  11   a ,  11   b , a stopper S is released and the laminated body  800  is conveyed by the conveyer  12  toward the pressing device  15 . 
     The pressing device  15  is configured so that the laminated body  800  formed by laminating the cut-out sheets  710 ,  720  is conveyed while both end portions in the conveyance direction of the laminated body  800  are pressed by a pressing portion from a side not in contact with the conveyer  14 . 
     The pressing device  15  has a plurality of rollers  201 ,  202 ,  203 ; press belts  204   a ,  204   b  wound around the plurality of rollers  201 ,  202 ,  203 ; and conveyance belts  205 ,  206  for conveying the laminated body  800 . 
     Any one of the plural rollers  201 ,  202 ,  203  is connected to a driving source and controlled so as to drive the press belts  204   a ,  204   b  at a predetermined speed in the conveyance direction. The conveyance belt  205  corresponds to the conveyance belt  14 . 
     The press belts  204   a ,  204   b  are wound around the rollers  201 ,  202 ,  203  and configured to be driven in association with the conveyance speed and the conveyance direction of the laminated body  800 . The press belts  204   a ,  204   b  are arranged to be interspaced from each other at a predetermined interval in the cross direction CD intersecting with the conveyance direction MD. Herein, the predetermined interval is an interval that allows the press belts  204   a ,  204   b  to come in contact with both end portions  800 A,  800 B in the cross direction CD of the laminated body  800 . 
     The press belts  204   a ,  204   b  according to the present embodiment are formed in a round tubular shape. That is, the press belts  204 ,  204   b  have a cross section in a substantially circular shape. 
     Interval D 2  between the outermost periphery of the press belts  204   a ,  204   b  wound around the rollers  201 ,  202 ,  203 , the outer most periphery which is most distant from the rotation axes of the rollers  201 ,  202 ,  203 , and the conveyance surface of the conveyance belt  205  is made shorter than lamination height D 1  of the laminated body  800 . The interval D 2  is adjusted to a height that the chemical is prevented from being squeezed out more than necessary. 
     The press belts  204   a ,  204   b  are inclined so as to gradually decrease the interval from D 1  to D 2 , between the outermost periphery of the press belts  204   a ,  204   b  and the conveyance belt  205 . Accordingly, a force is gradually applied to the both outer end portions  800 A,  800 B in the widthwise direction of the laminated body  800  to be conveyed. 
     With the manufacturing method and the manufacturing apparatus  10  according to the present embodiment, by means of the pressing device  15  configured as described above, the laminated body  800  can be conveyed while pressing the both end portions  800 A,  800 B, other than a central region  800 C, of the laminated body  800 . 
       FIG. 10  is a view for illustrating a package structure  200  of a conventional laminated body  300  the entire surface of which was pressed at the time of packaging in a package main body  210 . With a conventional package structure  200 , in an early stage of usage, when a sheet  310  is taken out of an opening portion  220  of the package main body  210 , the sheet  310  is regulated by an edge portion  220   e  while being pressed by an upper surface  210   a  of the package main body  210 , and therefore, it could happen that the sheet  310  becomes difficult to be taken out or the sheets  310 ,  320  are taken out all stuck together. 
     To solve the problems described above, it is contemplated that the package main body  210  is made larger as compared to a volume of the laminated body  300 . 
     However, if a configuration is made to expand a gap between the package main body  210  and the laminated body  300  for the purpose of the easiness of taking sheets out at the beginning of usage, raw materials as ingredients of the package main body become a waste, leading to increase in manufacturing costs. Furthermore, it also gives an impression to a consumer (user) that the package body and its contents (sheets) do not fit each other, thereby leading to deterioration in an appearance and reliability of the package body as a product. 
     Furthermore, a too-large gap between the package main body  210  and the laminated body  300  may cause a problem that it becomes difficult to laminate package bodies each other or there is increased volume when the plurality of package bodies are packaged all together. 
     On the other hand, in the manufacturing structure according to the present embodiment, in the manufacturing step, after the laminating step S 107 , the laminated body  800  formed by laminating the predetermined number of sheets is pressed not by uniformly pressing its entire surface but pressing the both end portions  800 A,  800 B in the conveyance direction by the pressing device  15 . 
     Accordingly, as shown in  FIG. 9 , a space S can be formed between the upper surface  20   a  of the package main body  20  and the outer end portions  800 A,  800 B in the widthwise direction of the laminated body  800 . Therefore, even in a case of formation that is made to adjust a size of the package main body  20  to a volume of the laminated body  800 , it is possible to prevent a problem caused by the fact that a sheet positioned in the upper surface side of the laminated body  800  is pressed by the upper surface  20   a  of the package main body  20 . Especially in an early stage of usage, a plurality of sheets can be prevented from being taken out all stuck together from the opening portion  21 . 
     Furthermore, in the package structure according to the present embodiment, since the surface of the laminated body  800  is not entirely pressed, it is possible to prevent variability in an impregnation amount which is caused by the fact that the chemical is shifted from sheets in the upper layer to sheets in the lower layer of the laminated body  800 . 
     With the package structure according to the present embodiment, it is possible to prevent reduction in the easiness of taking sheets out, which is caused by increasing an amount of a predetermined chemical impregnated in sheets. Thus, it is possible to achieve both increase of the impregnation rate of a predetermined chemical and the easiness of taking sheets out. 
     Thus, the present invention has been explained in detail by using the above-described embodiments; however, it is obvious that for persons skilled in the art, the present invention is not limited to the embodiments explained herein. The present invention can be implemented as corrected and modified modes without departing from the gist and the scope of the present invention defined by the claims. Therefore, the description of the specification is intended for explaining the example only and does not impose any limited meaning to the present invention. 
     For example, with respect to the package structure of the package body  100  of wet wipes according to the present embodiment, it was explained that the convex region T extends in the longitudinal direction L. However, the convex region T may extend in the widthwise direction W. In this case, the convex region T comes in contact with the upper surface  20   a  of the package main body  20  at both sides in the widthwise direction W of the opening portion  21 . 
     EXAMPLES 
     A take-out test was performed by packaging the laminated body formed of seventy-two sheets in the package main body and taking sheets out one by one. The results are shown in  FIGS. 11(   a ) to  11 ( c ). Specifically, a manufacturing line that one set was formed by stacking four sheets was made. That is, the laminated body formed of eighteen sets was produced and sealed in the package body. 
       FIG. 11(   a ) shows the results of a take-out test performed to the package structure to which the pressing step was not performed.  FIG. 11(   b ) shows the results of a take-out test performed to the package structure in which the entire surface was pressed.  FIG. 11(   c ) shows the results of a take-out performed to the package structure in which the pressing step was performed to both ends of the laminated body. In  FIGS. 11(   a ) to  11 ( c ), the vertical axis shows the amount of a pulled-out portion of subsequent sheet in the event of pop-up (a phenomenon that a subsequent sheet is pulled out in association with a prior sheet). A portion is length (mm). 
     According to the results, it turned out that the laminated body to which the pressing step was not performed has a strong tendency that four sheets are taken out at one time. That is, it turned out that one set of sheets stacked in the manufacturing line is prone to be taken out all stuck together. Furthermore, it turned out that even in a case of a laminated body with its entire surface being pressed, one set of sheets stacked in the manufacturing line is prone to be taken out all together. 
     On the other hand, it turned out that the laminated body having the package structure according to the embodiment hardly causes the pop-up and has a strong tendency that all of sheets can be taken out one by one. 
     In addition, the entire content of Japanese Patent Application No. 2010-223248 (filed on Sep. 30, 2010) is incorporated in the present specification by reference. 
     INDUSTRIAL APPLICABILITY 
     According to the present invention, it is possible to provide a package structure of wet wipes, which is capable of achieving both increase of the impregnation rate of a predetermined chemical and the easiness of taking sheets out.