JP5951189B2 - Disposable absorbent article - Google Patents

Description

  The present invention relates to a disposable absorbent article, and more particularly, to a disposable absorbent article such as a diaper, excretion training pants, and an incontinence brief.

  DESCRIPTION OF RELATED ART Conventionally, the disposable absorbent article which has a liquid absorption structure which has a vertical direction and a horizontal direction and has a skin opposing surface and a non-skin opposing surface is well-known.

  For example, Patent Document 1 discloses a disposable absorbent article in which a pair of side flaps are provided on both lateral edges of the liquid absorbing structure and a pair of end flaps are provided on both longitudinal edges of the liquid absorbing structure. Is disclosed. The side flaps are provided in a stretched state so that the first elastic member extending along the longitudinal direction acts on the side flaps, and the second elastic members extending along the lateral direction are applied on the end flaps so that the contracting force acts on the end flaps. Is provided in an extended state.

  According to this disposable absorbent article, excrement such as urine can be prevented from leaking outward in the lateral direction by the side flaps, and excrement can be prevented from leaking outward in the vertical direction by the end flaps. .

JP 2003-199788 A

  In the disposable absorbent article disclosed in Patent Document 1, side flaps are provided at both lateral edges of the liquid absorbing structure, and end flaps are provided at both longitudinal edges of the liquid absorbing structure. Therefore, in the wearing state, the wearer's skin is surrounded by side flaps, end flaps, and the liquid absorption structure, and the diaper is formed between the wearer's skin and the liquid absorption structure. The humidity of the internal space becomes high. Therefore, the diaper disclosed in Patent Document 1 has poor air permeability in the internal space, and is thereby worn due to stuffiness caused by the high humidity in the internal space and the odor of excrement filling the internal space. There was a problem of giving discomfort to third parties such as caregivers who exchanged diapers and diapers.

  Therefore, in the present invention, it is an object to provide a disposable absorbent article having good air permeability.

  In order to solve the above-mentioned problems, the present invention includes a first invention and a second invention.

  The disposable absorbent article to which the first invention is directed has a longitudinal direction and a lateral direction, an annular waistline member having a skin facing surface and a non-skin facing surface, and an inseam joined to the non-skin facing surface of the waistline member The crotch member includes a first sheet formed from a fiber nonwoven fabric, a second sheet formed from a plastic film, a pair of end flaps extending along both end edges of the first and second sheets, 1 and a pair of side flaps extending along both side edges of the second sheet, and the side flaps are folded back to the skin facing surface side.

The first aspect of the invention has an adhesive that joins the first sheet and the second sheet with the side flaps, and the adhesive extends from the front edge to the rear edge of the both end edges in the longitudinal direction. extending as continuous, by the first sheet and the second sheet and the adhesive, one of the transverse direction is Rukoto formed so as channels opening extending in the longitudinal direction.

The disposable absorbent article to which the second invention is directed has a longitudinal direction and a lateral direction, an annular waistline member having a skin facing surface and a non-skin facing surface, and an inseam joined to the non-skin facing surface of the waistline member comprising a member, crotch member comprises a sheet formed of a fibrous nonwoven fabric, a pair of end flaps extending along opposite edges of the sheet, including a pair of side flaps extending along both side edges of the sheet.

According to a second aspect of the invention, the side flap includes a winding portion in which the sheet is folded back to either the skin-facing surface or the non-skin-facing surface, and the front side of the winding portion is the side flap. having an adhesive bonded to said adhesive, said continuous so as to extend in the longitudinal direction to the rear end from the front end edge of said end edges, the said adhesive and said sheet, extending in the longitudinal direction channel Is formed on the side flaps.

  In one of preferred embodiments of these inventions, the waistline member includes a waistline inner sheet positioned on the skin facing surface, a waistline outer sheet positioned on the non-skin facing surface, and a waistline in an expanded state so that contraction force acts. And both end edges in the longitudinal direction of the crotch member are joined to a portion of the waistline member where the contraction force of the elastic member acts.

  In another preferred embodiment of these inventions, cover sheets that cover both ends of the crotch member are provided on the non-skin facing surface of the waistline member.

  In another preferred embodiment of these inventions, the crotch member has a central region located between the lateral directions of the pair of side flaps, and the first sheet is positioned on the non-skin facing surface side in the central region. And the 2nd sheet | seat is located in the skin opposing surface side.

  In another preferred embodiment of these inventions, the crotch member has a liquid absorbing structure, and the portion of the crotch member having the liquid absorbing structure has a bending resistance of 15 to 140 mm in the cantilever method in the longitudinal direction. It is in the range.

  According to the disposable absorbent article according to one or more embodiments of the first invention, a channel opened in any one of the lateral directions extends in the longitudinal direction by the first sheet, the second sheet, and the adhesive. Therefore, a disposable absorbent article with good breathability can be provided.

  According to the disposable absorbent article according to one or more embodiments of the second invention, since the longitudinally extending channel is formed in the side flap by the sheet and the adhesive, the disposable absorbent article has good air permeability. Articles can be provided.

The perspective view of the disposable diaper as an example of the disposable absorbent article in 1st Embodiment of 1st invention. The partially broken expansion | deployment top view seen from the skin opposing surface side in the state which expand | deployed the diaper. III-III sectional view taken on the line in FIG. IV-IV sectional view taken on the line in FIG. The perspective view which shows joining of a waist member and a crotch member. The top view of a liquid absorption structure. VII-VII sectional view taken on the line in FIG. Sectional drawing of the principal part of the disposable diaper as an example of the disposable absorbent article in 2nd Embodiment of 1st invention. Sectional drawing of the principal part of the disposable diaper as an example of the disposable absorbent article in 3rd Embodiment of 1st invention. Sectional drawing of the principal part of the disposable diaper as an example of the disposable absorbent article in embodiment of 2nd invention.

  An embodiment of a diaper that is an example of an absorbent article according to the present invention will be described with reference to the accompanying drawings.

<First Embodiment>
FIG. 1 is a partially broken perspective view of a pant-type diaper 1 having a waist opening 10a and a pair of leg openings 10b when viewed from the front in the diaper 1 of the first embodiment. In FIG. 1, X indicates a horizontal direction, Y indicates a vertical direction orthogonal to the horizontal direction X, and Z indicates a front-rear direction orthogonal to the horizontal direction X and the vertical direction Y, respectively.

  The diaper 1 includes an annular waistline member 10 that extends in the waistline direction of the wearer, and a crotch member 30 that extends in a direction intersecting the waistline direction. The waistline member 10 includes a front panel 11 positioned in front of the front-rear direction Z and a rear panel 12 positioned rearward. The side edges 11a, 12a of the front-rear panels 11, 12 are respectively opposite in the lateral direction X. Are joined to each other at joints 13 that overlap in the form of palms and are intermittently arranged in the longitudinal direction Y.

  FIG. 2 is a partially broken plan view of the diaper 1 obtained by releasing the joint at the joint 13 and extending in the lateral direction X and the front-rear direction Z, and is a surface facing the wearer's skin in the diaper 1 (hereinafter referred to as “the diaper 1”). This is simply referred to as the skin facing surface, and the surface opposite to the skin facing surface is referred to as the non-skin facing surface). In FIG. 2, P is a vertical virtual center line that bisects the diaper 1 in the horizontal direction X and extends in the vertical direction Y, and Q is a horizontal direction that bisects the crotch member 30 in the vertical direction Y. A horizontal virtual center line extending in X. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 and 4, W indicates a thickness direction orthogonal to the horizontal direction X and the vertical direction Y, respectively. The thickness direction W in FIGS. 3 and 4 corresponds to the front-rear direction Z in FIG.

  The diaper 1 has a front waistline region 2 continuous in the longitudinal direction Y, a rear waistline region 3, and a crotch region 4 located between the front and rear waistline regions 2 and 3. The front waistline region 2 covers the front waistline portion of the wearer, the back waistline region 3 covers the back waistline portion of the wearer, and the crotch region 4 covers the crotch portion of the wearer.

  The front and rear waist regions 2 and 3 are formed by front and rear panels 11 and 12, and the crotch region 4 is formed by a crotch member 30. As illustrated, the front panel 11, the rear panel 12, and the crotch member 30 are symmetrical with respect to the vertical virtual center line P.

  The front and rear panels 11 and 12 include a waistline inner surface sheet 20 positioned on the skin facing surface side, a waistline outer surface sheet 21 positioned on the non-skin facing surface side, and a waistline sandwiched between the waistline inner and outer surface sheets 20 and 21. And an elastic member (elastic member) 22. A fiber nonwoven fabric having moisture permeability is used for the waistline inner and outer surface sheets 20 and 21. The waistline inner and outer surface sheets 20 and 21 are joined to each other via a hot melt adhesive (not shown).

  The waistline elastic member 22 is fixed to at least one of the waistline inner and outer surface sheets 20 and 21 in a stretched state via a hot melt adhesive (not shown) so that contraction force acts. In the state shown in FIG. 1, the waistline elastic member 22 is contracted in the lateral direction X, and the gathers 15 are formed on the waistline inner and outer surface sheets 20 and 21 by the contraction force of the waistline elastic member 22.

  As shown in FIG. 2, the crotch member 30 includes a crotch inner sheet (inner sheet) 28 positioned on the skin facing surface side, a crotch outer sheet (outer sheet) 29 positioned on the non-skin facing surface side, A liquid absorbing structure 80 interposed between the inner sheet 28 and the crotch outer sheet 29 is provided.

  As shown in FIGS. 4 and 6, the liquid absorbing structure 80 includes a liquid absorbing diffusion inner surface sheet 81 located on the skin facing surface side, a liquid absorbing bottom sheet 82 positioned on the non-skin facing surface side, and a sheet. And an absorptive liquid-absorbing holding material 83 interposed between 81 and 82. In FIG. 4, the size of the absorbent polymer particles 84 is exaggerated in order to clearly indicate the presence of the absorbent polymer particles 84 to be described later, which form the liquid-absorbing holding material 83.

The liquid-absorbing diffusion inner surface sheet 81 is formed of a water-permeable fiber nonwoven fabric that has been subjected to a hydrophilic treatment using a thermoplastic synthetic resin as a material. For example, the liquid-absorbing diffusion inner surface sheet 81 is formed by subjecting an SMS fiber nonwoven fabric made of polypropylene to a hydrophilic treatment. More specifically, the liquid-absorbent diffusing inner sheet 81, the mass of about between spunbonded nonwoven each other of 4.0~5.0g / ^{m 2,} mass of about 0.5 to 2.0 g / ^{m 2} melt blown nonwoven fabric A water-permeable SMS fiber nonwoven fabric having a mass of about 10.0 to 12.0 g / m ² subjected to a hydrophilic treatment is used.

The liquid-absorbing bottom sheet 82 is formed of a water-permeable or hardly water-permeable fiber nonwoven fabric that has been subjected to a hydrophobic or water-repellent treatment using a thermoplastic synthetic resin as a material. For example, the liquid-absorbing bottom sheet 82 is formed by subjecting an SMS fiber nonwoven fabric made of polypropylene to a hydrophobic or water-repellent treatment. More specifically, during the spunbonded nonwoven fabric to each other the mass about 4.0~6.0g / ^{m 2,} by interposing a mass of about 0.5 to 2.0 g / ^{m 2} melt blown nonwoven fabric, a hydrophobic or water-repellent A non-permeable SMS fiber nonwoven fabric having a treated mass of about 10.0 to 13.0 g / m ² is used.

  The liquid absorption holding material 83 is formed only of absorbent polymer particles 84 that do not contain absorbent fibers and can be separated from each other. The absorbent polymer particles 84 are, for example, starch-based, acrylic acid-based, amino acid-based particles or fibers, and are known to be water-insoluble and water-swellable having an absorption capacity of at least several tens of times the self-mass. These polymers can be used.

  As shown in FIG. 6, in the liquid absorbing structure 80, existence regions 85 where the absorbent polymer particles 84 exist and non-existence regions 86 where the absorbent polymer particles 84 do not exist are alternately arranged in the vertical direction Y. Yes.

  In the presence area 85, for example, as shown in FIG. 4, the liquid-absorbing / diffusing inner surface sheet 81 and the liquid-absorbing bottom sheet 82 are separated, and an adhesive 87 such as a hot melt adhesive is applied to the liquid-absorbing bottom sheet 82. Thus, the absorbent polymer particles 84 are fixed to the liquid-absorbing bottom sheet 82. The adhesive 87 is applied to the entire area of the liquid-absorbing bottom sheet 82. In the diaper 1, for example, eight existence regions 85 are provided.

  In the non-existing region 86, as shown in FIGS. 4 and 7, for example, an adhesive 88 such as a hot melt adhesive is applied to the liquid-absorbing / diffusing inner sheet 81, and the liquid-absorbing / diffusing inner sheet 81, the liquid-absorbing bottom sheet 82, Are joined by adhesives 87 and 88. The adhesive 88 is applied to the entire area of the non-existing area 86, for example.

  The liquid absorbing structure 80 is joined by a hot melt adhesive 78 provided between the crotch inner sheet 28 and the liquid absorbing diffusion inner sheet 81, and between the crotch outer sheet 29 and the liquid absorbing bottom sheet 82. They are joined by a hot melt adhesive 79 provided.

  The liquid absorbing structure 80 having the above-described configuration has a bending resistance in the longitudinal direction Y of about 15 to 140 mm. The bending resistance conforms to the bending A method (45 ° cantilever method) defined in Section 8.19.1 of JIS L 1096, and does not include a crease in the vicinity of the horizontal virtual center line Q of the diaper 1. Thus, the sample (the length dimension in the horizontal direction X is 50 mm and the length dimension in the vertical direction Y is 150 mm) is cut out from the crotch member 30 with scissors, and the skin facing surface and the non-skin facing surface of each sample are measured. . This is a value obtained by performing the measurement three times and averaging the three measurements.

  For the crotch inner sheet 28, a known material can be used as long as it is a liquid-permeable sheet. For example, an air-through nonwoven fabric, a spunbond nonwoven fabric, a hydrophilic processed aperture plastic film, or these nonwoven fabric and plastic film can be used. It can form from the laminated sheet formed by laminating | stacking.

  The crotch inner sheet 28 has a length dimension in the lateral direction X larger than that of the liquid absorbing structure 80. As shown in FIG. 4, for example, both side edges 28a of the sheet that extend outward in the lateral direction X from the liquid absorbing structure 80 are provided. The liquid absorption structure 80 is folded back to the non-skin facing surface side. Further, as shown in FIG. 2, the crotch outer sheet 28 has a length dimension in the longitudinal direction Y larger than that of the liquid absorbing structure 80, and extends to the outside of the liquid absorbing structure 80 in the vertical direction Y. 28b and covers the entire skin facing surface of the liquid absorbing structure 80.

A known material can be used for the crotch outer sheet 29 as long as it is a liquid-impervious or liquid-impervious sheet. For example, it can be formed from a spunbond / meltblown / spunbond (SMS) fiber nonwoven fabric, an air-through fiber nonwoven fabric, a point bond fiber nonwoven fabric, a spunbond fiber nonwoven fabric, or a laminate sheet obtained by laminating these nonwoven fabrics and a plastic film. For the crotch outer sheet 29, a laminate sheet formed by laminating a moisture-permeable first sheet 29a formed from a fiber nonwoven fabric and a liquid-impermeable second sheet 29b formed from a plastic film is used. Yes. For the second sheet 29b, for example, a thermoplastic synthetic resin having a mass of about 16 to 24 g / m ^{2 made} of polyethylene is used. In the central region 37, the first sheet 29a is positioned on the non-skin facing surface side, while the second sheet 29b is positioned on the skin facing surface side. In the side flap 38, the first sheet 29a is facing the skin. On the other hand, the second sheet 29b is positioned on the non-skin facing surface side. Further, as shown in FIGS. 3 and 4, in the lateral direction X, the side edge 29 c of the first sheet 29 a and the side edge 29 d of the second sheet 29 b coincide with each other at the free side edge 38 a of the side flap 38. That is, the length dimension in the horizontal direction X of the second sheet 29b is larger than the length dimension in the horizontal direction X of the first sheet 29a. The second sheet 29b in this example is provided with a plurality of through holes (not shown) extending from the skin facing surface to the non-skin facing surface, and the second sheet 29b also has air permeability.

  As shown in FIG. 2, the crotch outer surface sheet 29 has a length dimension in the horizontal direction X and the vertical direction Y larger than those of the crotch inner sheet 28 and the liquid absorption structure 80, respectively. And both end edges 31 and 32 extending in the horizontal direction X, and both side edges 29c and 29d extending in the vertical direction Y. The crotch member 30 is formed of, for example, a crotch outer surface sheet 29 and includes a pair of side flaps 38 extending along both side edges 29c and 29d, and a pair of front and rear end flaps 35 and 36 extending along both end edges 31 and 32. have.

  The crotch outer sheet 29 has a folding line 39 extending in the longitudinal direction Y along both side edges 29c and 29d, and the folding curve 39 forms a rectangular central region 37 in the lateral direction X and a pair of extending in the longitudinal direction Y. A side flap 38 is defined, and the side flap 38 is folded back to the skin facing surface side of the central region 37.

  In FIG. 2, the leg-hole elastic members 50 and 60 are exposed except for the first sheet 29 a on the rear end edge 32 side of the right side flap 38, while the left side flap 38 has the crotch region 4. Except for some of the first sheets 29a, a part of the left leg-hole elastic members 50 and 60 are exposed, but in both side flaps 38 of the crotch outer sheet 29, the first sheet 29a and the second sheet A pair of first leg-hole elastic members 50 and second leg-hole elastic members 60 having the vertical virtual center line P as the target axis are provided between the two legs 29b.

  As the leg-hole elastic members 50 and 60, strand-like or string-like elastic members can be used. The leg-hole elastic members 50 and 60 are fixed in an expanded state to at least one of the first sheet 29a and the second sheet 29b by a hot melt adhesive (not shown) or the like. In the diaper 1, a plurality of first leg elastic members 50 and a plurality of second leg elastic members 60 are provided on one side flap 38 of the crotch member 30.

  The pair of first leg-hole elastic members 50 are closest to each other on the lateral virtual center line Q in both side flaps 38 and gradually separated from each other in the longitudinal direction Y as they are separated from the horizontal virtual center line Q. In addition, the both end edges 31 and 32 are provided in a continuous manner so as to be parallel to the longitudinal virtual center line P.

  The first leg-hole elastic member 50 contracts around the wearer's leg in the wearing state, and prevents excrement such as urine from leaking from around the leg.

  The second leg-hole elastic member 60 is arranged in a straight shape so as to extend in the longitudinal direction Y. Further, the pair of second leg-hole elastic members 60 are parallel to each other and parallel to the longitudinal virtual center line P. These second leg-hole elastic members 60 are disposed between the vertical virtual center line P and the first leg-hole elastic member 50 in the side flap 38.

  In the wearing state, the second leg-hole elastic member 60 contracts at the lower part of the wearer's crotch and is separated from the crotch inner sheet 28 to raise the side flap 38 so that excrement such as urine and stool is in the lateral direction of the diaper 1. Prevent leakage to X.

  FIG. 5 is a perspective view showing the joining of the crotch member 30 and the waistline member 10. The crotch member 30 and the rear panel 12 of the waistline member 10 are joined by an adhesive 74 applied to at least one of the crotch member 30 or the rear panel 12. In this example, the adhesive 74 is applied only to the crotch member 30, but the adhesive 74 may be applied only to the rear panel 12, or the adhesive 74 may be applied to both the rear panel 12 and the crotch member 30. May be applied respectively.

  An application region 70 formed by applying an adhesive 74 such as a hot melt adhesive to the crotch member 30 includes a first region 71 extending in the lateral direction X in the central region 37 and a first region in the lateral direction X in the side flap 38. A pair of second regions 72 that extend in a straight line from both side edges 71a of the 71 so as to be separated from the longitudinal virtual center line P, and a lateral direction from an edge 72a of the second region 72 in the longitudinal direction Y in the side flap 38 And a pair of third regions 73 extending so as to approach the virtual center line Q. An adhesive 74 that joins the crotch member 30 and the rear panel 12 is provided in such a manner as to be continuous in the longitudinal direction Y in the side flaps 38, and in the lateral direction at the rear end edge 32 located in the rear waistline region 3 of the both end edges 31. The waistline member 10 and the crotch member 30 are joined so as to provide the rear pocket 75 between the waistline member 10 and the crotch member 30 by being provided in a manner continuous to X. Therefore, since the excrement such as stool can be accommodated in the rear pocket 75 when the wearer is lying on the back, the amount of excrement to be accommodated can be increased. In addition, since the diaper 1 has the skin facing surface of the crotch member 30 joined to the non-skin facing surface of the waistline member 10, the amount of excrement to be accommodated can be further increased.

  In the front waistline region 2, the application region 70 a for applying the adhesive 74 that joins the crotch member 30 and the front panel 11 has a third region 73 that is separated from the front region 73 a separated from the horizontal virtual center line Q by the horizontal direction. The only difference is that it is formed from the rear region 73b close to the virtual center line Q, but the others are the same, and the waistline member 10 and the inseam so as to provide the front pocket 76 between the waistline member 10 and the inseam member 30. The member 30 is joined.

As shown in FIGS. 3 and 4, in the central region 37, the first sheet 29 a and the second sheet 29 b are joined by an adhesive 98 applied to the entire region of the central region 37. In the side flap 38, the first sheet 29a and the second sheet 29b fix the adhesive (not shown) applied to the second leg elastic member 60 and the first leg elastic member 50 to the sheets 29a and 29b. For this purpose, at least one of the sheets 29a and 29b is bonded by an adhesive 99 and an adhesive 90 described later. The adhesive 99 is applied at a mass per unit area of about 5 to 10 g / m ² , for example. The adhesive 98 extends from the central region 37 to the side flap 38 and is applied so as to overlap the adhesive 99 in the side flap 38.

The adhesive 90 is, for example, a hot-melt adhesive or the like, and is separated from the side edges 29c and 29d of the sheets 29a and 29b in the lateral direction X by a required dimension L1 in a direction away from the longitudinal virtual center line P. The crotch member 30 is provided so as to be continuous from the front edge 31 to the rear edge 32. The required dimension L1 is preferably about 1 to 10 mm, more preferably about 1 to 5 mm. Further, the adhesive 90 is applied at a mass per unit area of about 3 to 50 g / m ² , for example, and is preferably larger than the mass per unit area of the adhesive 99, for example. In the side flap 38, a tubular channel 91 is formed between the adhesive 90 and the side edges 29 c and 29 d by the first sheet 29 a, the second sheet 29 b, and the adhesive 90 from the front edge 31 of the crotch member 30. It is formed so as to continue to the end edge 32.

  According to this diaper 1, the first sheet 29 a, the second sheet 29 b, and the adhesive 90 are formed so that the channel 91 that opens in one of the horizontal directions X extends in the vertical direction Y. An internal space of the diaper 1 formed between the liquid structure 80 and the wearer's skin communicates with the outside of the diaper 1 through the channel 91. For this reason, if the inner space of the diaper 1 is deformed by the movement of the wearer of the diaper 1 such as walking, sitting, and standing, air enters and exits the inner space through the channel 91. Therefore, the air permeability of the diaper 1 can be improved. In particular, in the diaper 1, in the crotch member 30, a channel 91 that continues from the front end edge 31 to the rear end edge 32 is formed in the side flap 38, so that the channel 91 cuts through the internal space of the diaper 1. Therefore, the diaper 1 with good air permeability can be provided. For this reason, while being able to prevent that the humidity of the internal space of the diaper 1 becomes high, it can prevent that the smell of excrement fills the internal space of the diaper 1. In addition, since the adhesive 90 is provided between the side edges 29c and 29d of the sheets 29a and 29b and the second leg-hole elastic member 60 in the lateral direction X, the adhesive 90 and the first sheet 29a of the side flap 38 It is possible to prevent the second sheet 29b from being separated in the thickness direction W.

  In addition, since the thermoplastic synthetic resin having rigidity is used for the second sheet 29b forming the channel 91, the channel 91 can be prevented from being deformed.

  In addition, in the central region 37, the first sheet 29a formed of the fiber nonwoven fabric is located on the non-skin facing surface, and thus the touch of the non-skin facing surface of the crotch member 30 is good. Further, since the non-skin facing surface of the second sheet 29b formed of the plastic film is covered with the first sheet 29a formed of the fiber nonwoven fabric, the second sheet 29b is prevented from directly hitting the second sheet 29b. In addition, it is possible to prevent the sound generated by the contact between the second sheet 29b and the foreign matter.

  Further, if the mass per unit area of the adhesive 90 is larger than that of the adhesive 99, the unit of the adhesive 90 that is close to the side edges 29c, 29d of the first and second sheets 29a, 29b in the side flap 38. Since the mass per area is larger than the mass per unit area of the adhesive 99 spaced apart from the side edges 29c and 29d, the length dimension of the adhesive 90 in the thickness direction W is changed to the length dimension of the adhesive 99. Can be larger. For this reason, the space | interval of the side edge 29c of the 1st sheet | seat 29a and the side edge 29d of the 2nd sheet | seat 29b can be enlarged, and the cross-sectional area of the vertical direction Y of the channel 91 can be enlarged.

  In the diaper 1, the front end edge 31 and the rear end edge 32 of the crotch member 30 are joined to a part of the waistline member 10 where the contraction force of the waistline elastic member 22 acts. Therefore, since the front and rear end edges 91a and 91b of the channel 91 are disposed at the part where the gathers 15 of the waistline member 10 are formed, it is possible to prevent the front and rear end edges 91a and 91b of the channel 91 from being blocked. it can.

  Moreover, in this diaper 1, as shown in FIGS. 1 and 2, a front cover sheet 93 that covers the front end edge 31 of the crotch member 30 is provided on the non-skin facing surface of the waistline member 10, and A rear cover sheet 94 covering the end edge 32 is provided on the non-skin facing surface of the waistline member 10. The front and rear cover sheets 93 and 94 are made of a non-woven fiber nonwoven fabric that has moisture permeability but hardly water permeability. For example, the melt blown nonwoven fabric which performed the hydrophobic process is used for the front and back cover sheets 93 and 94. Therefore, the diaper 1 has poor water permeability while ensuring air permeability.

  In addition, an absorbent article can be suitably changed within the scope of the present invention, and is not limited to the above-described embodiment. For example, the present invention is not limited to the diaper 1 and can be applied to excretion training pants and the like. For the member constituting the diaper 1, a known material usually used in this kind of field can be used without limitation in addition to the material described in the present specification unless otherwise specified. .

  In embodiment mentioned above, while the 1st sheet | seat 29a was located in the non-skin opposing surface side in the center area | region 37, the 2nd sheet | seat 29b demonstrated the diaper 1 located in the skin opposing surface side. However, in the central region 37, the first sheet 29a may be positioned on the skin facing surface, while the second sheet 29b may be positioned on the non-skin facing surface.

  In the embodiment described above, the diaper 1 in which only the crotch outer sheet 29 has the side flaps 38 and the front and rear end flaps 35 and 36 has been described. However, only the crotch inner sheet 28 may have the side flaps 38 and the front and rear end flaps 35, 36, and the crotch inner sheet 28 and the crotch outer sheet 29 have the side flaps 38 and the front and rear end flaps 35, 36. You may have. In the above-described embodiment, the crotch outer surface sheet 29 has been described as having the first sheet 29a formed from a fiber nonwoven fabric and the second sheet 29b formed from a plastic film. However, the present invention is not limited to this, and the crotch inner sheet 28 may include a first sheet formed from a fiber nonwoven fabric and a second sheet formed from a plastic film. Of course, one of the crotch inner / outer surface sheets 28 and 29 may be a first sheet formed from a fiber nonwoven fabric, while the other is a second sheet formed from a plastic film.

  Furthermore, in the embodiment described above, the diaper 1 in which the side edge 29c of the first sheet 29a and the side edge 29d of the second sheet 29b are aligned in the lateral direction X has been described. However, the side edge 29c of the first sheet 29a and the side edge 29d of the second sheet 29b do not have to coincide with each other, and in the lateral direction X, the side of the second sheet 29b with respect to the side edge 29c of the first sheet 29a. The edge 29d may protrude, or the side edge 29c of the first sheet 29a may protrude with respect to the side edge 29d of the second sheet 29b.

Second Embodiment
FIG. 8 is a cross-sectional view of a main part of a diaper 100 according to the second embodiment of the first invention. Since the basic configuration of this embodiment is the same as that of the first embodiment, only differences will be described below.

  In FIG. 8, the first sheet 129a is a moisture-permeable sheet formed from a fiber nonwoven fabric, while the second sheet 129b is a liquid-impermeable sheet formed from a plastic film. As shown in FIG. 8, the length dimension in the lateral direction X of the first sheet 129a is larger than the length dimension in the lateral direction X of the second sheet 129b, and the free side edge 38a of the side flap 38 is the first sheet. It has the winding part 196 formed by bending 129a to the non-skin facing surface side.

  An adhesive 190 is provided in a straight line so as to extend in the longitudinal direction Y between the leading end side of the winding portion 196 of the first sheet 129a and the second sheet 129b. In the lateral direction X, the adhesive 190 is separated from the side edge 129c of the first sheet 129a by a required dimension L2 toward the direction close to the longitudinal virtual center line P, and on the side edge 129d of the second sheet 129b. On the other hand, it is arranged so as to be spaced apart by a required dimension L3 in a direction away from the longitudinal virtual center line P, and is provided in a manner continuous from the front edge 31 to the rear edge 32 of the crotch member 30. The required dimensions L2 and L3 are preferably about 1 to 10 mm, more preferably about 1 to 5 mm. In the side flap 38, one of the lateral directions X opens between the adhesive 190 and the side edge 129c of the first sheet 129a by the first sheet 129a, the second sheet 129b, and the adhesive 190. The channel 191 is formed so as to extend in the longitudinal direction Y, and is tubular between the adhesive 190 and the side edge 129d of the second sheet 129b by the first sheet 129a, the second sheet 129b, and the adhesive 190. The channel 195 is formed to extend in the vertical direction Y. These channels 191 and 195 are formed so as to continue from the front end edge 31 to the rear end extension 32 of the crotch member 30.

  If the adhesive 190 is provided as described above, the two channels 191 and 195 extending in the longitudinal direction Y can be formed, so that the air permeability can be further improved. The required dimension L2 and the required dimension L3 are not necessarily the same. Further, the first sheet 129a may be a sheet formed from a plastic film, while the second sheet 129b may be a sheet formed from a fiber nonwoven fabric.

<Third Embodiment>
FIG. 9 is a cross-sectional view of a main part of a diaper 200 according to the third embodiment of the first invention. Since the basic configuration of this embodiment is the same as that of the first embodiment, only differences will be described below.

  In FIG. 9, the first sheet 229a is a moisture-permeable sheet formed from a fiber nonwoven fabric, while the second sheet 229b is a liquid-impermeable sheet formed from a plastic film. As shown in FIG. 9, the length dimension in the lateral direction X of the first sheet 229a is larger than the length dimension in the lateral direction X of the second sheet 229b, and the free side edge 38a of the side flap 38 is the first sheet. It has the winding part 296 formed by bending 229a to the non-skin facing surface side.

  An adhesive 290 is provided in a straight shape so as to extend in the longitudinal direction Y between the leading end side of the winding portion 296 of the first sheet 229a and the second sheet 229b. The adhesive 290 is, for example, a hot melt adhesive, and in the lateral direction X, the adhesive 290 is spaced apart from the side edge 229c of the first sheet 229a in a direction close to the longitudinal virtual center line P by a required dimension L4, The second sheet 229b is arranged so as to be separated from the side edge 229d by a required dimension L5 in a direction away from the longitudinal virtual center line P, and is continuous from the front edge 31 to the rear edge 32 of the crotch member 30. It is provided in the mode to do. The required dimensions L4 and L5 are preferably about 1 to 10 mm, more preferably about 1 to 5 mm. In the side flap 38, a tubular channel 291 extends between the adhesive 290 and the side edge 229c of the first sheet 229a in the longitudinal direction Y by the first sheet 229a, the second sheet 229b, and the adhesive 290. A channel in which one of the lateral directions X is opened by the first sheet 229a, the second sheet 229b, and the adhesive 290 between the adhesive 290 and the side edge 229d of the second sheet 229b. 291 is formed to extend in the vertical direction Y. These channels 291 and 295 are formed so as to continue from the front end edge 31 to the rear end extension 32 of the crotch member 30. Further, the second leg-hole elastic member 60 is disposed between the distal end side 287 and the proximal end side 288 of the winding portion 296 in the first sheet 229a.

  If the adhesive 290 is provided as described above, the two channels 291 and 295 extending in the longitudinal direction Y can be formed, so that the air permeability can be further improved. The required dimension L4 and the required dimension L5 are not necessarily the same. Further, the first sheet 229a may be a sheet formed from a plastic film, while the second sheet 229b may be a sheet formed from a fiber nonwoven fabric.

  FIG. 10 is a cross-sectional view of a main part of a diaper 300 according to the second invention. Since the basic configuration of the second invention is the same as that of the first embodiment of the first invention, only the differences will be described below.

  In FIG. 10, the first sheet 329a is a moisture-permeable sheet formed from a fiber nonwoven fabric, while the second sheet 329b is a liquid-impermeable sheet formed from a plastic film. As shown in FIG. 10, the length dimension in the lateral direction X of the first sheet 329a is larger than the length dimension in the lateral direction X of the second sheet 329b, and the free side edge 38a of the side flap 38 is the first sheet. It has the winding part 396 formed by bending 329a to the non-skin facing surface side. The side edge 329c of the first sheet 329a and the side edge 329d of the second sheet 329b are opposed to each other and separated from each other by a predetermined dimension in the lateral direction X.

  An adhesive 390 is provided between the distal end side 396a and the proximal end side 396b of the winding portion 396 of the first sheet 329a so as to extend in the longitudinal direction Y. The adhesive 390 is, for example, a hot-melt adhesive or the like, and in the lateral direction X, is separated from the side edge 329c of the first sheet 329a by a required dimension L6 toward the direction close to the longitudinal virtual center line P, and It arrange | positions so that the required dimension L7 may be spaced apart from the bending part 400 of the winding part 396 toward the direction spaced apart from the vertical virtual center line P, and from the front edge 31 to the rear edge 32 of the crotch member 30 It is provided in a continuous manner. The required dimensions L6 and L7 are preferably about 1 to 10 mm, more preferably about 1 to 5 mm. In the side flap 38, the tubular channel 391 is formed by the adhesive 390 and the first sheet 329a so as to extend in the longitudinal direction Y, and the tubular channel 395 is longitudinally formed by the adhesive 390 and the first sheet 329a. It is formed to extend in the direction Y. These channels 391 and 395 are formed so as to continue from the front end edge 31 to the rear end extension 32 of the crotch member 30. Further, the second leg-hole elastic member 60 is disposed between the distal end side 396a and the proximal end side 396b of the winding portion 396 in the first sheet 329a.

  If the adhesive 390 is provided as described above, the two channels 391 and 395 extending in the longitudinal direction Y can be formed, so that the air permeability can be further improved. The required dimension L6 and the required dimension L7 are not necessarily the same. Further, the first sheet 329a may be a sheet formed from a plastic film, while the second sheet 329b may be a sheet formed from a fiber nonwoven fabric.

1 Diaper (absorbent article)
10 waistline member 20 waistline inner sheet 21 waistline outer sheet 22 waistline elastic member (elastic member)
29a First sheet 29b Second sheet 29c Side edge 29d Side edge 30 Crotch member 31 Front end edge 32 Rear end edge 80 Liquid absorbing structure 90 Adhesive 91 Channel 93 Front cover sheet 94 Rear cover sheet 100 Diaper (absorbent article)
129a First sheet 129b Second sheet 190 Adhesive 191 Channel 200 Diaper (absorbent article)
229a First sheet 229b Second sheet 290 Adhesive 291 Channel 300 Diaper (absorbent article)
329a First sheet (sheet)
329b Second sheet 390 Adhesive 391 Channel 396 Winding portion X Horizontal direction Y Vertical direction

Claims (6)

An annular waistline member having a longitudinal direction and a transverse direction, having a skin facing surface and a non-skin facing surface, and a crotch member joined to the non-skin facing surface of the waistline member;
The crotch member includes a first sheet formed from a fiber nonwoven fabric, a second sheet formed from a plastic film, a pair of end flaps extending along both edges of the first and second sheets, and the first A disposable absorbent article comprising a pair of side flaps extending along both side edges of the second sheet, the side flaps being folded back to the skin facing surface side,
Having an adhesive for joining the first sheet and the second sheet with the side flaps ;
The adhesive is continuous in the longitudinal direction so as to extend from the front end edge to the rear end edge of the both end edges,
The absorbent article, wherein the first sheet, the second sheet, and the adhesive are formed such that a channel opened in one of the lateral directions extends in the longitudinal direction. An annular waistline member having a longitudinal direction and a transverse direction, having a skin facing surface and a non-skin facing surface, and a crotch member joined to the non-skin facing surface of the waistline member;
The crotch member is a disposable absorbent article including a sheet formed of a fiber nonwoven fabric, a pair of end flaps extending along both end edges of the sheet, and a pair of side flaps extending along both side edges of the sheet. ,
The side flaps have a glue which the sheet has a wound portion folded back on one of the skin-facing surface or the non-skin facing surface, bonding the distal end side of the winding portion to said side flaps And
The adhesive is continuous in the longitudinal direction so as to extend from the front end edge to the rear end edge of the both end edges,
The absorbent article, wherein a channel extending in the longitudinal direction is formed in the side flap by the sheet and the adhesive. The waistline member is provided between the waistline inner sheet positioned on the skin facing surface, the waistline outer sheet positioned on the non-skin facing surface, and the waistline inner / outer sheet in a stretched state so that contraction force acts. An elastic member,
The absorptive article according to claim 1 or 2 by which said both ends of said crotch member are joined to a part to which contraction force of said elastic member acts in said waist member.   The absorbent article according to claim 3, wherein a cover sheet that covers the both end edges of the crotch member is provided on the non-skin facing surface of the waistline member. The crotch member has a central region located between the lateral directions of the pair of side flaps,
The said 1st sheet | seat is located in the said non-skin opposing surface side in the said center area | region, The said 2nd sheet | seat is located in the said skin opposing surface side, The absorptivity in any one of Claims 1, 3, 4 Goods.   The crotch member has a liquid absorbing structure, and the portion of the crotch member having the liquid absorbing structure has a bending resistance of the cantilever method in the longitudinal direction in a range of 15 to 140 mm. The absorbent article in any one.

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