JP2019107055A - Disposable diaper and production method of disposable diaper - Google Patents

Abstract

To provide a disposable diaper capable of improving air permeability and a production method thereof.SOLUTION: A disposable diaper comprises: external bodies 12F, 12R; and an absorber body 16 comprising end part regions 16A on both end parts in a cross direction Y and forming a crotch part. The first and second external bodies have an elastic member 15U extending in a girth direction and extending and shrinking. The external bodies 12F, 12R have an inside elastic part 27 formed by sandwiching the elastic member 15U extending in the girth direction X and extending and shrinking, by the sheet, and positioned closer to a skin side than the absorber body 16, and an outside sheet part 26 facing the inside elastic part 27 and adhered on outside of the absorber body 16. A length L2 between both end parts of the girth direction X of the outside sheet part 26 is longer than a length L3 between both end parts of the girth direction X of the absorber body 16 and is shorter than a length L1 between both end parts of the girth direction of the inside elastic part 27.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a disposable diaper and a method of manufacturing the disposable diaper.

  The disposable diaper of patent document 1 is provided with the inner side elastic part located inside an absorptive main body, and between an absorptive main body and an inner side elastic part is non-adhesive. And, on both sides of the absorbent main body in the waist direction, the outer sheet portion and the inner elastic portion located opposite to each other are adhered by the hot melt adhesive.

Patent 6229787

  On the other hand, air permeability in disposable diapers is preferably as high as possible from the viewpoint of protecting the skin, and even in the above-described disposable diaper in which the inner elastic portion and the outer sheet portion are adhered, further improvement of air permeability is desired. ing.

  An object of the present invention is to provide a disposable diaper and a method of manufacturing the disposable diaper capable of improving air permeability.

  A disposable diaper for solving the above problems comprises a first exterior body constituting a front body, a second exterior body constituting a back body, and the first exterior body and the second exterior body on both sides in the front-rear direction. An absorbent main body comprising an overlapping end region and forming a crotch portion between the first exterior body and the second exterior body, and at least one of the first exterior body and the second exterior body The two outer casings comprise an elastic member extending in the circumferential direction and extending and contracting, the inner elastic portion being configured by sandwiching the elastic member between the sheets, the inner elastic portion being positioned on the inner side closer to the skin side than the absorbent main body. And an outer sheet portion positioned opposite to the inner elastic portion and adhered on the outer side opposite to the skin from the absorbent main body, and both ends of the outer sheet portion in the circumferential direction of the waist The length between the parts is the torso of the absorbent body Ri longer than the length between opposite end portions and shorter than the length between the two ends of the waist direction of the inner elastic part of the position where the outer sheet portions are overlapped.

  According to the above configuration, air permeability can be improved in the exposed region where the inner elastic portion not covered by the outer sheet portion is exposed, as compared with the configuration in which the entire inner elastic portion is covered by the outer sheet portion.

In the disposable diaper, at least one of the first exterior body and the second exterior body includes an upper region and a lower region located on the crotch side of the upper region, and the upper region is An outer elastic portion including the inner elastic portion, the lower region including a lower elastic member extending in the circumferential direction and extending and contracting, the lower elastic member being sandwiched between sheets, the absorbent main body It is good also as composition provided with the above-mentioned outside elastic part located more outside.
According to the above configuration, in the lower region, the outer elastic portion forms a fold for guiding the excrement in the space between the end region of the absorbent main body and the inner elastic portion in accordance with the contraction of the lower elastic member. Can.

In the disposable diaper, the outer sheet portion includes a first region in which the inner elastic portion is positioned, and a second region in which the outer elastic portion is positioned, and between the ends in the circumferential direction of the first region. The length may be longer than the length between both ends of the absorbent main body in the circumferential direction and shorter than the length between both ends of the inner elastic portion in the circumferential direction.
According to the above configuration, the inner elastic portion can be positioned in the first region, and the outer elastic portion can be positioned in the second region.

In the disposable diaper, the outer sheet portion may be integrated by bonding a first sheet element including the first area and a second sheet element including the second area.
According to the above configuration, each of the first sheet element and the second sheet element can be cut without waste from the raw fabric.

  The manufacturing method of the disposable diaper for solving the said subject is the 1st exterior body which comprises a front body, the 2nd exterior body which comprises a back body, and the both ends in the front-back direction are said 1st exterior body and said 1st 2. A method of manufacturing a disposable diaper comprising an end region overlapping with an outer package, and an absorbent main body forming a crotch portion between the first outer package and the second outer package, the first outer package And at least one of the second exterior members is an inner elastic portion including an elastic member which extends in the circumferential direction of the body and extends and contracts, and the elastic member is sandwiched between sheets, The inner elastic portion positioned on the inner side closer to the skin side than the elastic main body, and the outer sheet portion positioned opposite to the inner elastic portion on the outer side opposite to the skin from the absorbent main body And the manufacturing method is Arranging and bonding the end region to the outer sheet portion, sandwiching the elastic member between the sheets to form the inner elastic portion, and the inner elastic portion being the end region with respect to the outer sheet portion Overlaying the end region with the outer sheet portion and the inner elastic portion, and bonding the outer sheet portion and the inner elastic portion. A length between both ends of the elastic body is longer than a length between both ends of the absorbent main body in the circumferential direction, and both ends in the circumferential direction of the inner elastic portion in a position where the outer sheet portions overlap. It is shorter than the length between departments.

  ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the disposable diaper which made it possible to improve air permeability, and a disposable diaper can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the underpants-type disposable diaper in 1st Embodiment which materialized the disposable diaper of this invention. (A) is a top view which shows the unfolded state of the underpants type disposable diaper in 1st Embodiment, (b) is aa sectional drawing of (a), (c) shows the adhesion area of the upper area (a 4D is a plan view corresponding to FIG. 4D, and FIG. 4D is a plan view corresponding to FIG. It is a figure which shows the manufacturing process of the underpants type disposable diaper of 1st Embodiment, (a) adhere | attaches a 1st sheet element to a 2nd sheet element, and arranges a lower elastic member in an outer side sheet part, (b) Fig. 6C is a view of overlapping sheets constituting the outer elastic portion with respect to the lower elastic member, Fig. 7C is a view in which an adhesive layer is provided on the outer sheet portion and the outer elastic portion, and Fig. 7D is an outer sheet portion and outer elastic A diagram in which the absorbent main body is placed on the part and the upper elastic member is disposed on the sheet that constitutes the inner elastic part, (e) is a diagram in which the upper elastic member is sandwiched by the sheet and the inner elastic part is configured, (f) The figure which arrange | positioned the inner side elastic part to the edge area | region and the outer side sheet part of an absorptive main body. Sectional drawing of the underpants-type disposable diaper in 2nd Embodiment. It is a figure which shows the manufacturing process of the underpants type disposable diaper of 2nd Embodiment, (a) adhere | attaches a 1st sheet element to a 2nd sheet element, and arranges a lower elastic member in an outer side sheet part, (b) Fig. 6C is a view of overlapping sheets constituting the outer elastic portion with respect to the lower elastic member, Fig. 7C is a view in which an adhesive layer is provided on the outer sheet portion and the outer elastic portion, and Fig. 7D is an outer sheet portion and outer elastic The figure which mounts the absorptive main part on the part and piles up the sheet which constitutes an inner elastic part, (e) is a figure which sandwiches an upper elastic member with a sheet and constitutes an inner elastic part, (f) shows an inner elastic part. The figure arrange | positioned to the edge area | region and outer side sheet part of an absorptive main body. Sectional drawing of the underpants-type disposable diaper in 3rd Embodiment. It is a figure which shows the manufacturing process of the underpants type disposable diaper of 3rd Embodiment, (a) adheres a 1st sheet element to a 2nd sheet element, and arranges a lower elastic member in a lower 2nd field, (b Is a view of the lower elastic portion, (c) is a view of the outer sheet portion and the outer elastic portion provided with an adhesive layer, and (d) is an outer sheet portion and an outer elastic portion with an absorbent main body mounted thereon. The figure which placed, (e) is a figure which shows the state which has arrange | positioned the inner side elastic part in the upper area equivalent part, (f) is the figure which arrange | positioned the inner side elastic part in the upper area equivalent part and comprising the pocket. Sectional drawing of the underpants-type disposable diaper in 4th Embodiment.

The underpants-type disposable diaper in one Embodiment which materialized the disposable diaper in this invention with reference to FIGS. 1-8 is demonstrated.
First Embodiment
As shown in FIGS. 1 and 2, the pants-type disposable diaper 10 (hereinafter simply referred to as "diaper 10") follows the front body 10F having a shape that follows the abdominal shape of the human body and the back shape of the human body A rear body 10R having a shape, and a crotch portion 10C connecting the front body 10F and the rear body 10R are provided.

  A side opposite to the crotch 10C in the front body 10F constitutes a waist portion 10W surrounding a portion around the waist of the human body, and the upper end is provided with a waist opening 10A. The left and right end portions of the front body 10F, the left and right end portions of the back body 10R, and the left and right end portions of the crotch portion 10C constitute a pair of left and right leg openings 10L having a shape surrounding a thigh of a human body. doing. Further, right and left end portions of the front body 10F and the back body 10R in the waist circumference direction X form a joint portion 11.

  Fig.2 (a) is a top view which shows the unfolded state of a pants type disposable diaper, (b) is aa sectional drawing of (a), (c) respond | corresponds the adhesion area | region of upper area to (a) And (d) is a plan view corresponding to (a) showing the adhesion area of the lower area. In addition, in FIG.2 (b), the right side turns into a diaper wearer's skin side.

  The torso portion 10W in the front body 10F is constituted by the first exterior body 12F, and the torso portion 10W in the back body 10R is constituted by the second exterior body 12R. Hereinafter, the first exterior body 12F and the second exterior body 12R are simply referred to as the exterior body 12 as a whole.

  The exterior body 12 has a rectangular shape whose longitudinal direction is the circumferential direction X, and the elastic members 15U and 15D are sandwiched between the sheets constituting the exterior body 12. The sheet constituting the exterior body is, for example, a non-woven fabric made of synthetic fibers made of polyethylene, polypropylene, polyester, and other thermoplastic resins as a raw material, and even a liquid-permeable sheet or a liquid-impervious sheet Good. The elastic members 15U and 15D are elastic bodies formed of one or more materials selected from natural rubber, synthetic rubber, urethane and the like, and are formed in a thread-like, cord-like, net-like, flat-like shape. A plurality of elastic members 15U and 15D are arranged parallel to one another along the waist direction X.

  The first exterior body 12F and the second exterior body 12R are connected by the absorbent main body 16 that constitutes the crotch portion 10C. The absorbent main body 16 has a rectangular shape in which the longitudinal direction Y is a longitudinal direction. The absorbent main body 16 includes a back sheet 17 having liquid impermeability, an absorber 18, and a top sheet 19 having liquid permeability. In the diaper 10, the top sheet 19 is disposed on the inside in contact with the skin of the wearer, and the back sheet 17 is disposed on the outside. Then, in the diaper 10, the back sheet 17, the absorbent body 18, and the top sheet 19 overlap in this order from the outside. Furthermore, a non-woven fabric may be disposed on the outside of the back sheet 17 in order to improve the touch feeling.

  The material forming the back sheet 17 is, for example, a film made of a liquid-impervious polyethylene resin. The back sheet 17 is formed with a large number of fine holes in order to secure air permeability. The material forming the top sheet 19 is, for example, one or more materials selected from a woven fabric, a non-woven fabric, a porous film and the like. In addition, the top sheet 19 is, for example, a fiber of thermoplastic resin such as polypropylene, polyethylene, polyester, nylon, etc., and a non-woven fabric having liquid permeability composed of fibers subjected to a hydrophilization treatment is used. .

  The absorber 18 has an elongated band shape so as to straddle the front body 10F, the crotch 10C, and the back body 10R. The material forming the absorber 18 is, for example, an absorbent material such as fluff pulp, a superabsorbent polymer, a hydrophilic sheet or the like. The absorbent body 18 is then wrapped by the core wrap, and disposed and joined between the back sheet 17 and the top sheet 19. A region overlapping the package 12 in the front-rear direction Y of the absorbent main body 16 is an end region 16A which is an adhered part to which the sheet constituting the package 12 is bonded.

  In the absorbent main body 16, the three-dimensional gathers 21 are disposed at both ends along the longitudinal direction Y. The three-dimensional gather 21 arranges the side sheets 21S at both ends along the front-rear direction Y on the top sheet 19, and arranges the elastic members 21E along the front-rear direction Y on the side sheets 21S. Specifically, the side sheet 21S is a long sheet that extends in the front-rear direction Y and includes a liquid-impervious nonwoven fabric and the like. The side sheet 21S is disposed such that the front end overlaps with the first exterior body 12F that configures a part of the front body 10F, and the rear end overlaps with the second exterior body 12R that configures a part of the rear body 10R. . In the solid gathers 21, when the elastic member 21E contracts, the side sheet 21S rises in the direction of contact with the skin of the wearer, and is positioned around the leg opening 10L.

  As shown to Fig.2 (a), the exterior body 12 is provided with upper region 12U and lower region 12D also in any exterior body 12 of the 1st exterior body 12F and the 2nd exterior body 12R. In the upper region 12U, the upper elastic member 15U is disposed inside the absorbent main body 16, that is, on the top sheet 19 side, and constitutes a part of the waist opening 10A and the waist portion 10W. In the lower region 12D, the lower elastic member 15D is disposed outside the absorbent main body 16, that is, on the back sheet 17 side, and constitutes a part of the waist portion 10W as the upper region 12U. The front end portion and the rear end portion of the solid gather 21 extend on the absorbent main body 16 to a position at least overlapping with the lower region 12D, and here extend to the boundary between the lower region 12D and the upper region 12U. Ru. Therefore, the solid gather 21 is held by the lower region 12D so as to be in close contact with the skin. The side sheet 21S constituting the solid gather 21 is folded back so as to sandwich the elastic member 21E, and the front end portion and the rear end portion of the folded back are sealed by the seal portion 23.

  Further, the upper elastic member 15U in the upper region 12U is disposed across the left and right end portions in the waist circumference direction X between the sheets whose longitudinal direction is the waist circumference direction X, and the adhesion with the skin is enhanced. The lower elastic members 15D in the lower region 12D are also disposed across the left and right ends in the waist direction X. As shown in FIG. 2 (c), the lower region 12D is directly adhered to the outer surface of the end region 16A in the absorbent main body 16, and a fine crease is formed in the end region 16A in accordance with the contraction of the lower elastic member 15D. Form a fold 16B like that. The fold 16B has a groove shape along the vertical direction (front-rear direction Y), and does not disappear even when the absorber 18 swells.

  The upper elastic member 15U constitutes a waist gather at a portion close to the waist opening 10A of the waist part 10W, and the lower elastic member 15D constitutes a tummy gather at a position adjacent to the lower side of the waist gather.

  As shown in FIG. 2B, the upper region 12U includes an inner elastic portion 27 in which the upper elastic member 15U is sandwiched between sheets, and an outer sheet portion 26 located on the outer side. The lower region 12D is provided with an outer elastic portion 28 in which the lower elastic member 15D is sandwiched between sheets, an upper region 12U, and a series of outer sheet portions 26.

  The outer sheet portion 26 is located on the outermost side opposite to the skin, and extends from the lower area 12D to the upper area 12U. The outer sheet portion 26 is a sheet connecting the upper area 12U and the lower area 12D.

  The inner elastic portion 27 is positioned inward with respect to the absorbent main body 16, is configured by sandwiching the upper elastic member 15U by the sheet 27A, and constitutes the upper region 12U. The surface of the inner elastic portion 27 facing the end region 16A is not bonded to the end region 16A.

  The outer elastic portion 28 is located outside with respect to the absorbent main body 16, is configured by sandwiching the lower elastic member 15D between the outer sheet portion 26 and the sheet 28A, and constitutes the lower region 12D. The entire surface of the end region 16A of the absorbent main body 16 is adhered to the surface of the outer elastic portion 28 facing the end region 16A by the adhesive layer 25.

  As shown in FIG. 2C, in the upper area 12U, in the outer sheet portion 26, the area to which the outer surface of the end area 16A of the absorbent main body 16 is adhered becomes the first adhesion area 22A, and the first adhesion area 22A. An area around which the sheet 27A of the inner elastic portion 27 is adhered is a second adhesion area 22B. The second adhesive area 22B is recessed toward the crotch 10C by arranging the end area 16A of the absorbent main body 16 in the first adhesive area 22A. In the inner portion of the concave shape, the inner elastic portion 27 becomes a non-adhesive portion with respect to the inner surface on the skin side of the end region 16A. Thereby, a pocket 30 is formed on the end region 16A between the sheet 27A of the inner elastic portion 27 and the absorbent main body 16. The pocket 30 has an open end on the crotch 10C side, and is configured to be able to accommodate excrement moving in the direction of the belly or the back. In addition, the second bonding area 22B includes a band-like area 34 having a predetermined width between the waist opening 10A and the tip of the end area 16A in the front-rear direction Y, and the waste stored in the pocket 30 is Leakage toward the waist opening 10A is suppressed.

  It is preferable that the sheet 27A, which is the skin-side sheet portion constituting the pocket 30, be a hydrophobic sheet since it is a portion for containing excrement. Thereby, the excrement in the pocket 30 can be suppressed from leaking out to the skin side.

  As shown in FIG. 2D, in the lower region 12D, a region bonded to the outer surface of the end region 16A of the absorbent main body 16 is the third bonded region 22C. Thus, the outer elastic portion 28 is directly adhered to the outer surface of the end area 16A, whereby the fold 16B is formed on the crotch side of the first adhesion area 22A constituting the pocket 30.

  The inner elastic portion 27 constitutes the waist portion 10W, and a length between both ends of the first sheath 12F and the second sheath 12R in the waist direction X (between the bonding portions 11) Match L1. Further, the outer elastic portion 28 also constitutes the waist portion 10W, and the length between both ends of the first sheath 12F and the second sheath 12R in the waist circumference direction X (between the bonding portions 11) Matches.

  On the other hand, the length L2 between both ends in the waist direction X of the outer sheet portion 26 overlapping the inner elastic portion 27 is the length L3 between the ends in the waist direction X of the end region 16A. It is also long and shorter than the length L1 between the two ends of the first sheath 12F and the second sheath 12R in the circumferential direction X (between the joints 11). As a result, the inner elastic portion 27 is provided with the exposed area 16X directly exposed to the outside without being covered by the outer sheet portion 26 on both sides of the end area 16A, and covered with the outer sheet portion 26 in the exposed area 16X. The air permeability is improved more than the area where the The area in which the inner elastic portion 27 is covered by the outer sheet portion 26 corresponds to the area of the pocket 30. Although excrement will enter the pocket 30, the presence of the outer sheet portion 26 makes it difficult to exude to the outer surface.

  Next, a method of manufacturing the diaper 10 will be described. As shown in FIG. 3A, the first sheet element 26X and the second sheet element 26Y constituting the outer sheet portion 26 are prepared. The first sheet element 26X and the second sheet element 26Y both have a rectangular shape, and can be cut without waste from the raw fabric.

  The first sheet element 26X prepared here is longer than the length between both ends of the end region 16A in the waist direction X, and both ends in the waist direction X of the first exterior body 12F and the second exterior body 12R. It is shorter than the length between the two ends (between the joints 11). That is, the length between both ends in the waist direction X of the first sheet element 26X is shorter than the length between the ends in the waist direction X of the exterior body 12, but in the waist direction X, the end region 16A is It is a size that can be covered. Further, the length between both ends in the front-rear direction Y of the first sheet element 26X is at least the length between the both ends in the front-rear direction Y of the inner elastic portion 27 plus the adhesive margin for the second sheet element 26Y. It is. Here, it is a length obtained by adding the length in the front-rear direction Y of the second sheet element 26Y as a margin to the length between both ends in the front-rear direction Y of the inner elastic portion 27.

  In addition, the second sheet element 26Y is a sheet element constituting the outer elastic portion 28. The length between both ends in the front-rear direction Y of the second sheet element 26Y corresponds to the length between both ends in the front-rear direction Y of the outer elastic portion 28, and the length between both ends in the circumferential direction X is This corresponds to the length between both ends of the first exterior body 12F and the second exterior body 12R between the end portions in the circumferential direction X (between the bonding portions 11). The lower elastic member 15D is disposed on the second sheet element 26Y in an extended state. The first sheet element 26 </ b> X and the second sheet element 26 </ b> Y are integrated by being bonded by an adhesive such as a hot melt adhesive to form the outer sheet portion 26. In the outer sheet portion 26, a portion of the first sheet element 26X is a first region in which the inner elastic portion 27 is positioned, and a portion of the second sheet element 26Y is a second region in which the outer elastic portion 28 is positioned.

  As shown in FIG. 3B, an adhesive 33 such as a hot melt adhesive is applied to the second sheet element 26Y, and a sheet 28A constituting the outer elastic portion 28 is adhered. Alternatively, the lower elastic member 15D to which the adhesive 33 is applied is disposed on the second sheet element 26Y, and the sheet 28A is superimposed on the second sheet element 26Y. Thus, the lower elastic member 15D is sandwiched between the second sheet element 26Y and the sheet 28A to form the outer elastic portion 28.

  As shown in FIG. 3C, the adhesive layer 25 is formed on the first adhesive area 22A of the first sheet element 26X, the third adhesive area 22C of the sheet 28A, and the second adhesive area 22B of the first sheet element 26X. Is formed. As shown in FIG. 3 (d), the end region 16A of the absorbent main body 16 is placed across the first sheet element 26X and the sheet 28A. The end area 16A of the absorbent body 16 is placed across the first adhesive area 22A of the first sheet element 26X and the third adhesive area 22C of the sheet 28A.

  Here, a series of sheets 27A sandwiching the upper elastic member 15U is prepared. The sheet 27A has a size corresponding to the inner elastic portion 27 when the sheet 27A is folded in half in order to sandwich the upper elastic member 15U. The upper elastic member 15U is disposed on the sheet 27A in a stretched state. As shown in FIG. 3E, the sheet 27A is folded in half after an adhesive such as a hot melt adhesive is applied, and sandwiches the upper elastic member 15U. Alternatively, the upper elastic member 15U coated with the adhesive is disposed on the sheet 27A, and the sheet 27A is folded in half. Thereby, the inner side elastic part 27 is comprised.

  As shown in FIG. 3F, the inner elastic portion 27 is bonded to the second bonding area 22B of the outer sheet portion 26 from above the end area 16A. Therefore, the inner elastic portion 27 is not adhered to the end region 16A. Thereby, in the first sheet element 26X, the inner elastic portion 27 is disposed on the inner side with respect to the absorbent main body 16. The inner elastic portion 27 is not adhered to the end region 16A, and the pocket 30 having the crotch 10C as an open end is formed between the end region 16A and the inner elastic portion 27. .

  Here, the first bonding area 22A and the third bonding area 22C to which the end area 16A of the absorbent main body 16 is bonded and the second bonding area 22B to which the inner elastic portion 27 is bonded have the same bonding at one time. The agent may be applied.

  Also, as described above, the adhesive may be applied using different adhesives or different application methods. In this case, for example, the end region 16A is adhered with high adhesion to the first adhesive region 22A and the third adhesive region 22C, and the inner elastic portion 27 is attached to the second adhesive region 22B. Is adhered to this with low adhesion. Thereby, the end area 16A can be firmly adhered to the first adhesion area 22A and the third adhesion area 22C, and the inner elastic portion 27 is elastic or pliable to the second adhesion area 22B. It can be glued so as not to damage it.

  Through the above-described steps, the first exterior body 12F and the second exterior body 12R are adhered to the absorbent main body 16. Thereafter, both end portions in the waist direction X of the first exterior body 12F and both ends in the waist direction X of the second exterior body 12R are joined to form a joint portion 11.

In the diaper 10 as described above, the following effects can be obtained.
(1-1) The air permeability in the exposed area 16X where the inner elastic portion 27 not covered by the outer sheet portion 26 is exposed can be improved.
(1-2) The outer sheet portion 26 has a smaller area than the inner elastic portion 27, and the manufacturing cost can be reduced.
(1-3) The area in which the inner elastic portion 27 is covered by the outer sheet portion 26 corresponds to the area of the pocket 30. Although excrement will enter the pocket 30, the presence of the outer sheet portion 26 makes it difficult to exude to the outer surface.

  (1-4) In the lower region 12D, the outer elastic portion 28 is disposed outside with respect to the absorbent main body 16 and is directly bonded to the end region 16A of the absorbent main body 16. Therefore, the absorbent main body 16 can be pressed against the skin of the wearer to facilitate absorption of excrement even before flowing to the upper region 12U. Further, in the end region 16A and the peripheral portion thereof, a fold 16B is formed on the skin-side surface of the absorbent main body 16 so as to be continuous with the longitudinal direction Y of the absorbent main body 16 in accordance with the contraction of the lower elastic member 15D. . Thereby, the excrement can be guided to the pocket 30 by the fold 16B. The folds 16B can be formed reliably by bonding the entire outer elastic portion 28 to the end region 16A.

(1-5) In the first region configured by the first sheet element 26X, the inner elastic portion 27 can be positioned, and in the second region configured by the second sheet element 26Y, the outer elastic portion 28 is positioned It can be done.
(1-6) The first sheet element 26X and the second sheet element 26Y are both rectangular in shape, and can be cut out from the raw fabric without waste.
(1-7) The first sheet element 26X and the second sheet element 26Y can be easily integrated by adhesion even if they are separate sheet elements.

Second Embodiment
FIG. 4 is a cross-sectional view corresponding to FIG. 2 (b) in the diaper of the second embodiment. In the diaper of the second embodiment, the upper elastic member 15U is sandwiched between two separate sheets 27A and 27B. In FIG. 4, the right side is the skin side of the diaper wearer. Hereinafter, the manufacturing method of the diaper of 2nd Embodiment is demonstrated.

  5 (a) to 5 (c) are the same as FIGS. 3 (a) to 3 (c) described above, and therefore the details are omitted. As shown in FIG. 5D, the end area 16A of the absorbent main body 16 is placed across the first adhesive area 22A of the first sheet element 26X and the third adhesive area 22C of the second sheet element 26Y. Ru. Here, a sheet 27A corresponding to the size of the inner elastic portion 27 is prepared. Then, the sheet 27A is adhered to the second adhesion area 22B of the outer sheet portion 26 from above the end area 16A. Therefore, the sheet 27A is not adhered to the end area 16A.

  Here, the first bonding area 22A and the third bonding area 22C to which the end area 16A of the absorbent main body 16 is bonded and the second bonding area 22B to which the sheet 27A is bonded are the same adhesive at one time. It may be applied. Also, as described above, the adhesive may be applied using different adhesives or different application methods.

  As shown in FIG. 5E, on the sheet 27A, the upper elastic member 15U is disposed in a stretched state, and an adhesive such as a hot melt adhesive is applied. Thereafter, a further sheet 27B having the size of the first sheet element 26X is stacked, and the upper elastic member 15U is sandwiched between the sheet 27A and the sheet 27B. Alternatively, the upper elastic member 15U coated with the adhesive is disposed on the sheet 27A, and the sheet 27B is overlapped. As shown in FIG. 5 (f), this constitutes the inner elastic portion 27, and the inner elastic portion 27 is disposed on the upper side of the absorbent main body 16. The inner elastic portion 27 is not adhered to the end region 16A, and the pocket 30 having the crotch portion as an open end is formed between the end region 16A and the inner elastic portion 27. .

  Through the above-described steps, the first exterior body 12F and the second exterior body 12R are adhered to the absorbent main body 16. Thereafter, both end portions in the waist direction X of the first exterior body 12F and both ends in the waist direction X of the second exterior body 12R are joined to form a joint portion 11.

With the diaper as described above, the following effects can be obtained.
(2-1) Since the outer sheet portion 26, the sheet 27A and the sheet 27B are separately used, each of the outer sheet portion 26, the sheet 27A and the sheet 27B can be effectively used. For example, sheets of different materials can be used for the outer sheet portion 26, the sheet 27A and the sheet 27B. In this case, as an example, a soft sheet can be used as the sheet 27B in contact with the skin, and a hard sheet having high water resistance and durability can be used as the outer sheet portion 26 and the sheet 27A.

Third Embodiment
FIG. 6 is a cross-sectional view corresponding to FIG. 2 (b) in the diaper of the third embodiment. The diaper of 3rd Embodiment has the structure which the outer side sheet | seat part 26 is located in the outermost side, and sandwiches lower elastic member 15D. In addition, the inner elastic portion 27 is sandwiched by one sheet 27A, and is folded back at a portion close to the crotch portion 10C. In FIG. 6, the right side is the skin side of the diaper wearer. Hereinafter, the manufacturing method of the diaper of 3rd Embodiment is demonstrated.

  As shown in FIG. 7A, the first sheet element 26X and the second sheet element 26Y constituting the outer sheet portion 26 are prepared. The first sheet element 26X and the second sheet element 26Y both have a rectangular shape, and can be cut without waste from the raw fabric.

  Here, since the first sheet element 26X is the same as the first sheet element 26X of the first embodiment and the second embodiment, the details will be omitted (see FIGS. 3A and 5A). The second sheet element 26Y includes a lower first area 32A and a lower second area 32B.

  As shown in FIG. 7A, the lower second region 32B is disposed on the front side in the drawing in a state in which the lower elastic member 15D is stretched, and then the adhesive 33 is applied. The lower first region 32A is valley-folded toward the lower second region 32B. And as shown in FIG.7 (b), the outer side elastic part 28 in which lower elastic member 15D was pinched by the sheet | seat is comprised. The lower elastic member 15D to which the adhesive 33 is applied may be disposed in the lower second region 32B, and the lower first region 32A may be valley-folded in the lower second region 32B.

  As shown in FIG. 7C, the adhesive layer 25 is formed on the first adhesive area 22A of the first sheet element 26X, the third adhesive area 22C of the sheet 28A, and the second adhesive area 22B of the first sheet element 26X. Is formed. As shown in FIG. 7D, the end region 16A of the absorbent body 16 is placed across the first sheet element 26X and the outer elastic portion 28.

  Here, the first bonding area 22A and the third bonding area 22C to which the end area 16A of the absorbent main body 16 is bonded and the second bonding area 22B to which the inner elastic portion 27 is bonded have the same bonding at one time. The agent may be applied. Also, as described above, the adhesive may be applied using different adhesives or different application methods.

  As shown in FIG. 7E, here, a series of sheets 27A sandwiching the upper elastic member 15U is prepared. The sheet 27A has a size to be the inner elastic portion 27 when the sheet 27A is bent in half so as to sandwich the upper elastic member 15U. The upper elastic member 15U is disposed on the sheet 27A in a stretched state. The sheet 27A is folded in half after an adhesive such as a hot melt adhesive is applied, and sandwiches the upper elastic member 15U. Alternatively, the upper elastic member 15U coated with the adhesive is disposed on the sheet 27A, and the sheet 27A is folded in half. Thereby, the inner side elastic part 27 is comprised.

  As shown in FIG. 7F, the inner elastic portion 27 is bonded to the second bonding area 22B of the outer sheet portion 26 from above the end area 16A. Therefore, the inner elastic portion 27 is not adhered to the end region 16A. Thereby, in the first sheet element 26X, the inner elastic portion 27 is disposed on the inner side with respect to the absorbent main body 16. The inner elastic portion 27 is not adhered to the end region 16A, and the pocket 30 having the crotch 10C as an open end is formed between the end region 16A and the inner elastic portion 27. .

  Through the above-described steps, the first exterior body 12F and the second exterior body 12R are adhered to the absorbent main body 16. Thereafter, both end portions in the waist direction X of the first exterior body 12F and both ends in the waist direction X of the second exterior body 12R are joined to form a joint portion 11.

In the diaper 10 as described above, the following effects can be obtained.
(3-1) Since the upper elastic member 15U is sandwiched by one sheet 27A, it is possible to reduce the number of parts of the inner elastic portion 27 and to improve the production efficiency.

Fourth Embodiment
As shown in FIG. 8, in the diaper of the fourth embodiment, the direction of the inner elastic portion 27 of the diaper of the third embodiment is reversed, and the fold of the bent sheet 27A is a waist opening It is a 10A side, and the end opposite to the fold is a crotch 10C side. In FIG. 8, the right side is the skin side of the diaper wearer. Also by such a diaper, the same effect as the diaper of the third embodiment can be obtained.

In addition, the said embodiment can also be changed suitably as follows and can also be implemented.
The first sheet element 26X and the second sheet element 26Y constituting the outer sheet portion 26 may be constituted by a series of sheet materials, that is, a single sheet material cut out in a T shape from the raw fabric. In this case, the step of bonding the first sheet element 26X and the second sheet element 26Y can be omitted, and the production efficiency can be improved.

  The outer case of either the first outer case 12F or the second outer case 12R may be provided with the upper region 12U and the lower region 12D. In addition, the lower region 12D (outside elastic portion 28) may be omitted in at least one of the first exterior body 12F and the second exterior body 12R.

  The outer elastic portion 28 may not be configured using the outer sheet portion 26. That is, the outer elastic portion 28 may be configured by sandwiching the lower elastic member 15D with two sheet elements, and the outer elastic portion 28 configured in this manner may be adhered to the outer sheet portion 26. In this case, the length L2 between the ends of the outer sheet portion 26 in the waist direction X is longer than the length L3 between the ends in the waist direction X of the absorbent main body 16, and It can be shorter than the length between both ends in the waist direction X.

  The upper area 12U and the lower area 12D may not be connected by the outer sheet portion 26. That is, the upper area 12U and the lower area 12D may be separated. The outer side sheet part 26 should just be provided in the position which opposes the inner side elastic part 27 at least, and can be suitably changed by the structure of a diaper except it.

  The region where the upper elastic member 15U located inside with respect to the absorbent main body 16 is disposed may overlap with the region where the lower elastic member 15D located outside the absorbent main body 16 is disposed. Further, the lower end portion of the region where the upper elastic member 15U is disposed and the upper end portion of the region where the lower elastic member 15D is disposed may be located at the same position in the boundary portion.

The pocket 30 is preferably provided on both the first exterior body 12F and the second exterior body 12R, but may be provided only on at least one side.
The disposable diaper may be a tape-type diaper.
-It may be a disposable diaper for infants or adults such as elderly people and disabled people who need nursing care. In addition, it may be for pets.
The outer sheet portion 26 constituting the exterior body 12, the sheet constituting the inner elastic portion 27, and the sheet constituting the outer elastic portion 28 may be liquid impermeable or liquid permeable It is also good.

  10A: opening around the waist, 10C: crotch, 10F: front, 10L: opening around the leg, 10R: rear, 10W: waist, 11: junction, 12D: lower region, 12F: first exterior Body, 12R: second exterior body, 12U: upper region, 15D: lower elastic member, 15U: upper elastic member, 16: absorbent main body, 16A: end region, 16X: exposed region, 17: back sheet, 18: Absorbent body 19 top sheet 21 solid gather 21E elastic member 21S side sheet 22A first adhesive area 22B second adhesive area 22C third adhesive area 23 seal portion 25 ... adhesive layer, 26 ... outer sheet portion, 26 X ... first sheet element, 26 Y ... second sheet element, 27 ... inner elastic portion, 27 A ... sheet, 27 B ... sheet, 28 ... outer elastic portion, 28 A ... sheet, 30 ... Socket, 32A ... first lower region, 32B ... lower second region, 33 ... adhesive, 34 ... belt-like region.

Claims (5)

A first exterior body constituting a front body,
A second exterior body that constitutes the back body,
The absorbent body includes an end region overlapping the first exterior body and the second exterior body on both sides in the front-rear direction, and an absorbent main body forming a crotch between the first exterior body and the second exterior body. ,
At least one of the first exterior body and the second exterior body is:
An inner elastic portion including an elastic member extending in a circumferential direction and expanding and contracting, and the elastic member being sandwiched between sheets, the inner elastic portion positioned on the inner side closer to the skin side than the absorbent main body;
And an outer sheet portion positioned opposite to the inner elastic portion and adhered to the outer side of the absorbent main body opposite to the skin,
The length between the ends of the outer sheet portion in the circumferential direction is longer than the length between the ends in the circumferential direction of the absorbent main body, and the inner side at a position where the outer sheet portions overlap. The disposable diaper whose length between the both ends of the said waist direction of an elastic part is shorter. At least one of the first exterior body and the second exterior body is:
An upper area and a lower area located on the crotch side of the upper area;
The upper region comprises the inner elastic portion;
The lower region is an outer elastic portion including a lower elastic member extending in the circumferential direction and expanding and contracting, and the lower elastic member is sandwiched between sheets, the outer side located outside the absorbent main body The disposable diaper according to claim 1, comprising an elastic portion. The outer sheet portion includes a first region in which the inner elastic portion is positioned, and a second region in which the outer elastic portion is positioned.
The length between the ends of the first region in the circumferential direction is longer than the length between the ends in the circumferential direction of the absorbent main body, and the ends of the inner elastic portion in the circumferential direction The disposable diaper according to claim 2, which is shorter than the length between the parts. The disposable diaper according to claim 3, wherein the outer sheet portion is formed by bonding and integrating a first sheet element including the first area and a second sheet element including the second area. A first exterior body constituting a front body,
A second exterior body that constitutes the back body,
An absorbent main body including an end region overlapping at both ends in the front-rear direction with the first exterior body and the second exterior body, and forming a crotch between the first exterior body and the second exterior body In the manufacturing method of the equipped disposable diaper,
At least one of the first exterior body and the second exterior body is:
An inner elastic portion including an elastic member extending in a circumferential direction and expanding and contracting, and the elastic member being sandwiched between sheets, the inner elastic portion positioned on the inner side closer to the skin side than the absorbent main body;
And an outer sheet portion positioned opposite to the inner elastic portion and adhered to the outer side of the absorbent main body on the side opposite to the skin,
The manufacturing method includes the steps of arranging and bonding the end region to the outer sheet portion;
The elastic member is sandwiched between the sheets to form the inner elastic portion, and the inner elastic portion is superimposed on the outer sheet portion from above the end area, and the end region is the outer sheet portion and the outer sheet portion. Sandwiching with the inner elastic portion, and bonding the outer sheet portion and the inner elastic portion.
The length between the ends of the outer sheet portion in the circumferential direction is longer than the length between the ends in the circumferential direction of the absorbent main body, and the inner side at a position where the outer sheet portions overlap. The manufacturing method of a disposable diaper shorter than the length between the both ends of the said waist direction of an elastic part.

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