JP2009219641A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article suppressing the attachment of feces to the skin of a wearer by restricting the float of a mesh structure body from a chassis. <P>SOLUTION: A diaper 1 includes: the liquid-absorbing chassis 2; the mesh structure body 3; a cover sheet 4; and leak barrier cuffs 5. The mesh structure body 3 is laminated on the body side of the chassis 2 via a liquid-absorbing sheet 8, the cover sheet 4 is laminated on the body side of the mesh structure body 3, and the leak barrier cuffs 5 are laminated at both sides on the body side of the cover sheet 4. In the cover sheet 4, the outer side edges 30a of both side sheets 30 are joined with the body sides of the chassis 2 and the inner side edges 30b of both side sheets 30 are joined with the body sides of the mesh structure body 3 over the side edges. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an absorbent article, and more particularly to absorbent articles such as disposable diapers, defecation training pants, and incontinence briefs.

Conventionally, as a disposable diaper having a mesh-like panel, for example, JP 2001-276121 A (Patent Document 1) is known. According to Patent Document 1, in a diaper having a liquid-permeable top sheet, a liquid-impervious back sheet, and a liquid-absorbent core interposed between the front and back sheets, a mesh shape is formed on the body side of the top sheet. A sheet-like panel is attached. The panel includes a barrier portion that forms a mesh and an opening that penetrates the panel formed between the barrier portions, and stool or the like excreted in the opening is collected. Since stool can be collected at the opening, stool does not remain on the wearer side of the panel, and the stool can be prevented from coming into contact with the wearer's skin.
JP 2001-276121 A

  The panel is joined to the face sheet by adhesion or welding. The panel and the top sheet are not joined at the opening, but are joined only to the barrier portion. Therefore, the joining area is reduced, and the panel is easily peeled off from the top sheet. When the panel is peeled off from the top sheet, the panel is lifted from the top sheet, and a space is formed between them. This space extends from the crotch area to the front and back waist area. There is a possibility that stool flows in this space, and the stool that has flowed returns to the opening and adheres to the skin of the wearer over a wide range.

  This invention makes it a subject to suppress that a mesh structure floats up from a chassis, and to suppress that a stool adheres to a wearer's skin.

  The present invention is arranged in at least the crotch area, the crotch area located between the longitudinal direction and the lateral direction, the body side and the clothing side, the front waist area, the back waist area, and the front and back waist areas that are continuous in the longitudinal direction. The present invention relates to an improvement in an absorbent article including a chassis having a liquid absorbing structure and a network structure having a plurality of passages formed on the body side of the liquid absorbing structure and penetrating in the thickness direction.

  This invention contains the coating sheet which covers a part of said mesh structure in the said absorbent article. The covering sheet includes a pair of both side sheet portions that extend in the longitudinal direction by forming openings apart from each other in the lateral direction, and the both side sheet portions are opposed to the lateral direction and extend in the longitudinal direction. Includes outer edges. The mesh structure includes both side edges that are opposite to each other in the horizontal direction and extend in the vertical direction, the outer edges of the both side seat portions are joined to the body side of the chassis, and the inner edges of the both side seat portions are the mesh. It is characterized by being joined to the body side of the mesh structure beyond the side edge of the structure.

  As one preferred embodiment, the mesh structure is formed from the crotch region to the rear waist region.

  As one of preferred embodiments, it further includes a pair of leakage barrier cuffs formed on the body side of the covering sheet and extending in the longitudinal direction and spaced apart in the lateral direction. The leak barrier cuff includes a base side edge and a free side edge facing the lateral direction and extending in the vertical direction, and a cuff elastic member attached to the free side edge in an extended state in the vertical direction, the base side edge And the portion including the free side edge is separated from the chassis by contraction of the cuff elastic member, and the lateral dimension from the base side edge to the free side edge is determined from the opening. It is set to a length that can be overlapped with the exposed network structure.

As another preferred embodiment, a liquid absorbent sheet is further included between the mesh structure and the chassis, and the liquid absorbent sheet has a water absorption of 200 mm / min to 30 mm / min.
The water absorption is measured by the Krem method of JIS P8141.

  As another preferred embodiment, the mesh structure is joined to the chassis side by adhesion or welding.

  As another preferred embodiment, the covering sheet includes a pair of both-end sheet portions that are separated in the longitudinal direction and extend in the transverse direction, and the both-end sheet portions are opposed to the longitudinal direction in the transverse direction. Includes extending inner and outer edges. The mesh structure includes both end edges that are opposed to the vertical direction and extend in the horizontal direction, the outer edges of the both end sheet portions are joined to the body side of the chassis, and the inner edges of the both end sheet portions are the mesh structure. It is characterized by being joined to the body side of the network structure beyond the edge of the mesh structure.

  Since a plurality of passages are formed in the mesh structure, and excrement and the like can be collected by the passages, the flow of excrement and the like can be suppressed. Therefore, it is possible to suppress excrement and the like from adhering to the wearer's skin over a wide range, and skin troubles due to excrement and the like can be suppressed. Moreover, since both sides of the mesh structure are pressed by the covering sheet, the mesh structure can be brought into close contact with the chassis. Therefore, the excrement can be prevented from flowing between the mesh structure and the chassis, and skin troubles due to the excrement and the like can be further suppressed.

  Since the mesh structure is formed from the crotch region to the rear waist region, it is possible to efficiently collect stools that are particularly prone to skin troubles, and to further suppress skin troubles. it can.

  A leak barrier cuff is formed on the body side of the covering sheet. Therefore, even if excrement leaks from the covering sheet, it is possible to suppress leakage from the diaper by the leakage barrier cuff. In addition, the lateral dimension from the base edge to the free edge of the leak barrier cuff is such that it can be stacked on the mesh structure exposed from the opening, thus preventing excrement from leaking from the mesh structure. can do. Moreover, since the leakage of the excrement in the lateral direction can be suppressed by the leakage barrier sheet and the excrement can be accommodated in the gap, the leakage of the excrement can be further suppressed.

  Since the liquid absorbing sheet having a water absorption of 200 mm / min to 30 mm / min is further included between the network structure and the chassis, the moisture is rapidly absorbed and the moisture is guided to the liquid absorbing structure. be able to. Therefore, it is possible to suppress the excrement from flowing backward in a state containing a large amount of moisture. Furthermore, since the flow of excreta is reduced by the network structure, it is possible to further quickly absorb moisture in the liquid absorbent sheet.

  Since the network structure is fixed to the chassis or the liquid-absorbing sheet by adhesion, the network structure can be further prevented from being lifted off from the chassis side.

  The covering sheet includes a pair of both-end sheet portions that are separated in the vertical direction and extend in the horizontal direction, and the both-end sheet portions can urge the mesh structure toward the chassis side. It is possible to suppress peeling off from the side.

An example of the present invention will be described using a disposable diaper as an absorbent article.
<First Embodiment>

  FIG. 1 is a plan view of the diaper 1 and a part thereof is broken for explanation. As illustrated, the diaper 1 is a so-called open type and includes a liquid-absorbing chassis 2, a mesh structure 3, a covering sheet 4, and a leak barrier cuff 5. As shown in FIG. 2, the diaper 1 has a mesh structure 3 laminated on the body side of the chassis 2 via a liquid absorbent sheet 8, and a covering sheet 4 is laminated on the body side of the mesh structure 3. Leakage barrier cuffs 5 are laminated on both sides of the body.

  FIG. 3 is a diagram showing details of the chassis 2, and a part thereof is broken for explanation. The chassis 2 includes an inner sheet 6 that forms a body-side inner surface and an outer sheet 7 that forms a clothing-side outer surface. The chassis 2 includes front and rear waist regions 9 and 10 and a crotch region 11 located between the front and rear waist regions 9 and 10, and a direction in which the front waist region 9, the crotch region 11, and the rear waist region 10 are continuous is defined as a longitudinal direction Y. The direction orthogonal to the vertical direction Y is defined as the horizontal direction X. The chassis 2 includes front and rear end edges 12 and 13 extending in the horizontal direction X facing the vertical direction Y, and both side edges 14 facing the horizontal direction X and extending in the vertical direction Y. Both side edges 14 have front and rear side edges 15 and 16 located in the front and rear waist areas 9 and 10, and leg side edges 17 located in the crotch area 11. The chassis 2 is curved toward the longitudinal center line PP that bisects the dimension in the lateral direction X at the leg side edge 17 to form an hourglass shape as a whole.

  Front and rear waist elastic members 18 and 19 extending in the lateral direction X are attached to the chassis 2 at the front and rear end edges 12 and 13. The front and rear waist elastic members 18, 19 are interposed between the inner and outer surface sheets 6, 7, and are attached by an adhesive (not shown) in an extended state in the lateral direction X. A plurality of leg elastic members 20 extending along the leg side edges 17 are attached to the crotch region 11. The leg elastic member 20 is interposed between the inner and outer surface sheets 6 and 7 and attached by an adhesive (not shown) in an expanded state.

A liquid absorbing structure 21 is interposed between the inner and outer surface sheets 6 and 7. The liquid-absorbing structure 21 includes a liquid-absorbent core material 22 having a mixture of fluff pulp and superabsorbent polymer particles, and a liquid diffusion sheet 23 such as tissue paper that wraps the core material 22. A liquid-impermeable leak barrier sheet 24 is interposed between the liquid absorbing structure 21 and the outer sheet 7 to suppress leakage of excrement such as urine from the liquid absorbing structure 21 to the outside of the diaper 1. Yes.
A tape fastener 25 is formed on the rear edge 16 of the chassis 2, and the tape fastener 25 is detachably engaged with the outer surface sheet 7 of the front waist region 9 so that the diaper 1 forms a three-dimensional shape. ing. Thus, when the diaper 1 becomes a three-dimensional shape, a waist opening is formed by the front and rear end edges 12 and 13, and a leg opening is formed by the leg side edge 17.

  FIG. 4 shows the network structure 3 in detail. The mesh structure 3 includes both side edges 33 facing the lateral direction X and extending in the longitudinal direction Y, and both end edges 34 facing the longitudinal direction Y and extending in the lateral direction X. The network structure 3 is arranged from the crotch region 11 to the rear waist region 10 to form a network structure by joining a plurality of partition walls 26 with joint portions 27, and between the partition walls 26, the body side of the mesh structure 3 and the body side are formed. A plurality of passages 28 are formed which open on the clothing side and penetrate in the thickness direction.

  As shown in FIG. 2, the network structure 3 is joined to the chassis 2 via the liquid absorbent sheet 8. The liquid absorbent sheet 8 is formed by compressing flap pulp or the like into a sheet shape, It is desirable that the water absorption be in the range of about 200 mm / min to 30 mm / min. The water absorption was measured by the Krem method of JIS P8141. It is also possible to use polymer particles mixed with fluff pulp. Such a liquid absorbing sheet 8 is located from the crotch region 11 to the rear waist region 10 of the chassis 2 and is joined to the inner surface sheet 6 by adhesion or welding.

  As shown in FIG. 2, the covering sheet 4 is formed from a liquid-permeable nonwoven fabric or the like, and is laminated on the body side of the network structure 3. The covering sheet 4 has a length dimension in the longitudinal direction Y substantially equal to the length dimension in the longitudinal direction Y of the chassis 2, and the length dimension in the transverse direction X is the length in the transverse direction X of the network structure 3. It is designed to be larger than the size. An opening 29 is formed in the covering sheet 4.

Both side sheet portions 30 extending in the vertical direction Y are formed on both sides in the horizontal direction X of the opening 29, and both end sheet portions 31 extending in the horizontal direction X are formed on both ends in the vertical direction Y. In other words, the opening 29 is formed by the both side sheet portions 30 and the both end sheet portions 31. The opening 29 is arranged from the crotch region 11 to the rear waist region 10, and the covering sheet 4 is laminated on the mesh structure 3 so that the mesh structure 3 is exposed from the opening 29. The opening area of the passage 28 exposed from the opening 29 is desirably about 20 to 99% with respect to the surface area of the mesh structure 3. Specifically, the opening area of the passage 28 exposed from the opening 29 is desirably about 2500 to 16000 mm ² .

  Both side sheet portions 30 of the covering sheet 4 include an outer edge 30 a that extends in the longitudinal direction Y to form the outer shape of the covering sheet 4, and an inner edge 30 b that forms the opening 29. The both end sheet portions 31 include an outer edge 31 a that extends in the lateral direction X to form the outer shape of the covering sheet, and an inner edge 31 b that forms the opening 29.

  The leak barrier cuff 5 is formed of a liquid-impervious nonwoven fabric or the like, and is formed of a pair of sheets extending in the longitudinal direction Y. The leakage barrier cuff 5 is spaced apart from the longitudinal center line PP, and the length dimension in the longitudinal direction Y is substantially equal to the length dimension of the chassis 2. The leak barrier cuff 5 joins the base side edge 5a to the chassis 2 and does not join the free side edge 5b. A cuff elastic member 32 extending in the longitudinal direction Y along this edge is attached to the free side edge 5b in an extended state. The leakage barrier cuff 5 is separated by the contraction force of the cuff elastic member 32 so that the portion including the free side edge 5b stands up from the chassis 2 with the base side edge 5a as a fulcrum, thereby forming a leakage leak, etc. Suppressed. The length dimension in the lateral direction X from the base side edge 5 a to the free side edge 5 b of the leakage barrier cuff 5 has a length that can overlap the mesh structure 3 exposed from the opening 29. That is, the length dimension in the lateral direction X from the base side edge 5 a to the free side edge 5 b is set to be at least larger than the length dimension in the lateral direction X of the both side sheet portions 30.

FIG. 5 is an end view taken along line VV in FIG. As illustrated, the liquid-absorbing structure 21, the liquid-absorbing sheet 8, the network structure 3, the covering sheet 4, and the leak barrier cuff 5 are laminated in this order toward the body. In the mesh structure 3, the partition wall 26 is joined to the liquid absorbent sheet 8 by adhesion or welding, and the body side and the liquid absorbent sheet 8 are communicated with each other through a passage 28.
In the covering sheet 4, the outer edges 30 a of both side sheet portions 30 extend to the outside in the width direction X of the mesh structure 3, and are joined to the inner sheet 6 by welding or adhesion. The inner edges 30b of the both side sheet portions 30 extend inward in the width direction X beyond the side edges 33 of the mesh structure 3, and are joined to the body side of the partition wall 26 by welding or adhesion. Accordingly, the side edges 33 of the mesh structure 3 are joined by the both side sheet portions 30 of the covering sheet 4 so as to be pressed against the clothing side.

  Since the mesh structure 3 is pressed by the covering sheet 4, both side edges 33 of the mesh structure 3 are crushed by the covering sheet 4, and the dimension in the thickness direction is shortened. By reducing the thickness of the side edges 33 in this manner, the distance between the free side edge 5b of the leak barrier cuff 5 that is spaced so as to stand up and the partition wall 26 of the mesh structure 3 can be increased. By increasing the separation distance from the free side edge 5 b to the partition wall 26, it is possible to suppress excrement collected by the mesh structure 3 from leaking out of the diaper 1 beyond the leakage barrier cuff 5.

  When wearing the diaper 1 as described above, the tape fastener 25 is detachably engaged with the outer surface sheet 7 of the front waist region 9 so that the opening 29 of the covering sheet 4 is located in the anus of the wearer. Let Therefore, the excreted feces can be guided to the mesh structure 3 through the opening 29. The stool enters the passage 28 of the mesh structure 3. Since the passage 28 is isolated by the partition wall 26, feces can be accommodated in the passage 28. Therefore, the fluidity of excreted feces can be reduced, and the feces can be prevented from adhering to the skin in a wide range. Further, the stool contacts the liquid absorbent sheet 8 through the passage 28. Since the liquid absorbent sheet 8 has a high water absorption, the water in the stored stool can be quickly moved to the liquid absorbent structure 21 side. Therefore, even when loose stool with a lot of moisture is excreted, the moisture can be quickly absorbed by the liquid absorbing structure 21, and the backflow of loose stool to the skin can be suppressed.

  Since the mesh structure 3 is pressed against the liquid absorbent sheet 8 by the covering sheet 4, it does not peel off from the liquid absorbent sheet 8 and float up. Therefore, the stool accommodated in the passage 28 does not move in the vertical direction Y or the horizontal direction X, but is absorbed by the liquid absorbing structure 21 on the spot. Therefore, the stool does not move over a wide area and the stool does not adhere to the skin.

  FIG. 6 is an end view taken along the vertical center line PP of FIG. As illustrated, in the covering sheet 4, the outer edges 31 a of the both end sheet portions 31 extend to the outside in the longitudinal direction Y of the mesh structure 3, and are joined to the inner sheet 6 by welding or adhesion. The inner edges 31b of the both end sheet portions 31 extend inward in the longitudinal direction Y beyond the side edges 34 of the mesh structure 3, and are joined to the body side of the partition wall 26 by welding or adhesion. Therefore, the edge 34 of the mesh structure 3 is joined by the both end sheet portions 31 of the covering sheet 4 so as to be pressed against the clothing side.

  Since the mesh structure 3 is pressed by the covering sheet 4, both end edges 34 of the mesh structure 3 are crushed by the covering sheet 4, and the dimension in the thickness direction is shortened. Thus, by reducing the thickness of the both end edges 34, the steps from the mesh structure 3 to the liquid absorbent sheet 8 and the liquid absorbent structure 21 are reduced. If the level difference is large, the skin irritation is increased, which may cause a skin trouble. However, the skin trouble can be suppressed by reducing the level difference.

The network structure 3 is bonded to the liquid absorbent sheet 8 by adhesion or welding. When the liquid absorbent sheet 8 is not attached, the network structure 3 is directly bonded to the inner sheet 6 of the chassis 2. May be. Further, instead of the liquid absorbent sheet 8, another liquid permeable sheet may be used. As the liquid-absorbing sheet 8, for example, a sheet formed by compressing natural fibers or synthetic fibers, a sheet further containing superabsorbent polymer particles, or other general fiber nonwoven fabrics can be used. As natural fibers, for example, cellulose-based natural fibers, cellulose-based regenerated fibers obtained by regenerating water-absorbing pulverized pulp or cotton, and other general fibers can be used. Examples of synthetic fibers that can be used include polyolefin fibers, polyester fibers, polyamide fibers, and other general fibers that have been subjected to hydrophilic treatment. As the polymer particles, for example, starch-based, cellulose-based, or synthetic polymer-based particles can be used.
<Second Embodiment>

FIG. 7 shows the diaper 1 of the second embodiment. In the second embodiment, only the covering sheet is different from the first embodiment, and other members are the same as those in the first embodiment. Therefore, the description about the same member is abbreviate | omitted.
As illustrated, the covering sheet 35 includes a pair of both side sheet portions 36 that are spaced apart in the horizontal direction X and extending in the longitudinal direction Y, and a pair of both-end sheet portions 37 that are spaced apart in the longitudinal direction Y and extend in the lateral direction X. Including. Both side sheet portions 36 and both end sheet portions 37 are separate sheets.

  The both side sheet portions 36 are laminated on the body side of the mesh structure 3. The pair of both side sheet portions 36 are positioned symmetrically with respect to the longitudinal center line PP, and are located on the outer side in the horizontal direction X and extending in the vertical direction Y, and on the inner side in the horizontal direction X in the vertical direction Y. And an inner edge 36b. The outer edge 36a is joined to the inner surface sheet 6 of the chassis 2 by adhesion or welding outside the lateral edge X of the side edge 33 of the network structure 3. The inner edge 36b is bonded to the body side of the mesh structure 3 beyond the side edge 33 by adhesion or welding. However, the portion of the inner edge 36b that does not overlap the mesh structure 3 is joined to the inner sheet 6 in the same manner as the outer edge 36a. Accordingly, both side edges 33 of the mesh structure 3 are covered by the both side sheet portions 36.

  The both end sheet portions 37 are laminated on the body side of the both side sheet portions 36. The pair of both-end sheet portions 37 is located outside the longitudinal direction Y and extends in the lateral direction X, an inner edge 37b located inside the longitudinal direction Y and extends in the lateral direction X, and extends in the longitudinal direction Y. And both side edges 37c. The outer edge 37b is joined to the inner surface sheet 6 of the chassis 2 by adhesion or welding outside the edge 34 of the network structure 3 in the longitudinal direction Y. The inner edge 37b is joined to the body side of the mesh structure 3 beyond the end edge 34 by adhesion or welding. Accordingly, both end edges 34 of the mesh structure 3 are covered by the both end sheet portions 37. Both side edges 37c are joined to the body side of both side sheet portions 36 by adhesion or welding.

  Both side edges 33 and both end edges 34 of the mesh structure 3 are covered with both side sheet portions 36 and both end sheet portions 37, respectively, and these sheet portions 36, 37 have the outer side 36a, 37a as the inner surface sheet 6 and the inner surface 36b, By joining 37b to the body side of the mesh structure 3, the mesh structure 3 is urged toward the chassis 2 and does not peel off from the inner surface sheet 6 and float. Therefore, in particular, excrement such as loose stool can be held in the passage 28 of the network structure 3, and it is possible to suppress the spread of loose stool and causing skin troubles. Furthermore, since the level | step difference of the mesh structure 3 and the liquid absorption structure 21 can be made small, the irritation | stimulation to skin can be decreased, without preventing standing of the leak barrier cuff 5. FIG.

The top view of the diaper of 1st Embodiment. An exploded view of the diaper. Explanatory drawing of a chassis. Explanatory drawing of a mesh structure. The VV line end view of FIG. FIG. 2 is an end view taken along a vertical center line in FIG. 1. The top view of the diaper of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Diaper 2 Chassis 3 Mesh structure 4 Cover sheet 5 Leakage barrier cuff 8 Liquid absorption sheet 9 Front waist area 10 Rear waist area 11 Crotch area 12 Front edge 13 Rear edge 14 Both edges 21 Liquid absorption structure 30 Both sides sheet part 30a Outside Edge 30b Inner edge 31 Both end sheet part 31a Outer edge 31b Inner edge 33 Both side edge 34 Both end edge 35 Cover sheet 36 Both side sheet part 36a Outer edge 36b Inner edge 37 Both end sheet part 37a Outer edge 37b Inner edge

Claims (6)

A longitudinal and lateral direction, a body side and a clothing side, a crotch region located between the front waist region, the rear waist region, and the front and rear waist region that are continuous in the longitudinal direction, and a liquid absorbing structure disposed at least in the crotch region In an absorbent article comprising: a chassis having a body; and a network structure having a plurality of passages formed on the body side of the liquid absorption structure and penetrating in the thickness direction,
A covering sheet covering a part of the network structure;
The covering sheet includes a pair of both side sheet portions that extend in the longitudinal direction by forming openings apart from each other in the lateral direction, and the both side sheet portions are opposed to the lateral direction and extend in the longitudinal direction. Including the outer edge,
The mesh structure includes both side edges that are opposite to each other in the horizontal direction and extend in the vertical direction, the outer edges of the both side seat portions are joined to the body side of the chassis, and the inner edges of the both side seat portions are the mesh. The absorbent article, which is bonded to the body side of the mesh structure beyond the side edge of the structure.   The absorbent article according to claim 1, wherein the network structure is formed from the crotch region to the rear waist region. A pair of leakage barrier cuffs formed on the body side of the covering sheet and extending in the longitudinal direction and spaced apart in the lateral direction;
The leak barrier cuff includes a base side edge and a free side edge facing the lateral direction and extending in the vertical direction, and a cuff elastic member attached to the free side edge in an extended state in the vertical direction, the base side edge And a portion including the free side edge is separated from the chassis by contraction of the cuff elastic member,
The absorbent article according to claim 1 or 2, wherein the lateral dimension from the base side edge to the free side edge is set to a length that can overlap the network structure exposed from the opening.   The absorbent article according to any one of claims 1 to 3, further comprising a liquid absorbent sheet between the network structure and the chassis, wherein the liquid absorbent sheet has a water absorption of 200 mm / min to 30 mm / min. .   The said mesh structure is an absorptive article in any one of Claims 1-4 joined to the said chassis side. The covering sheet includes a pair of both-end sheet portions that are separated in the longitudinal direction and extend in the lateral direction, and the both-end sheet portions include inner and outer edges that face the longitudinal direction and extend in the lateral direction,
The mesh structure includes both end edges that are opposed to the vertical direction and extend in the horizontal direction, the outer edges of the both end sheet portions are joined to the body side of the chassis, and the inner edges of the both end sheet portions are the mesh structure. The absorbent article according to any one of claims 1 to 5, wherein the absorbent article is bonded to the body side of the network structure beyond the edge of the mesh structure.

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