JP2005211673A - Pants type disposable wearing article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pants type disposable wearing article which can be smoothly torn on both side edge parts connected to each other in the joined region of them. <P>SOLUTION: The pants type disposable wearing article 1 is equipped with first and second girth regions 20 and 22 and the crotch part 21 positioned between the first and second girth regions 20 and 22 and constituted so that a girth opening 5 and leg peripheral openings 6 are demarcated by connecting the first and second girth regions 20 and 22 by the joined regions B1 extending to both side edge parts 1a, a first elastic member 8 is attached to the edge part of the girth opening 5 in a stretched state and a second elastic members 9 are attached to the edge parts of the leg peripheral openings 6. Both end parts 8a of the first elastic member 8 are fixed to the first site B2 internally offset in the girth direction X from the joined regions B1 and both end parts 9a of the second elastic members 9 are fixed to the second site B3 inwardly offset in the leg peripheral direction from the joined regions B1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a pants-type disposable wearing article, and more particularly to a wearing article such as a pants-type disposable diaper, training pants, and incontinence pants.

  JP-A-9-38134 discloses a liquid-absorbent core interposed between a liquid-permeable top sheet and a liquid-impervious back sheet, and a crotch region positioned between the front and rear waist regions and the waist region. A pants-type disposable wearing article in which the front and rear waistline regions are connected by joint regions extending to both side edges of the waistline regions to define a waistline opening and a pair of leg-hole openings. . In the joining region, a large number of heat-sealing portions are intermittently arranged in the vertical direction with a required distance from each other.

  When the worn article is undressed, the front and rear waist areas are pulled in a direction in which the waist areas are separated from each other, and the worn article is torn in the longitudinal direction from the waist opening to the leg opening in the joining region.

  A waist elastic member that expands and contracts in the waist direction is attached to both end edges defining the waist opening in an expanded state. Leg-side elastic members that expand and contract in the leg-surrounding direction are attached to both side edges defining the leg-surrounding opening in an extended state. An auxiliary elastic member that expands and contracts in the direction of the waist is attached in an extended state below the waist elastic member in the front and rear waist area.

  These elastic members have both end portions and an intermediate portion extending between the both end portions. The elastic member for the waist and the elastic member for the legs are such that both end portions and intermediate portions thereof are interposed between the top sheet and the back sheet, and intermittently via an adhesive on at least one inner surface of the sheets. It is fixed to. The auxiliary elastic member has both end portions interposed between the top sheet and the back sheet, and is intermittently fixed to the inner surface of at least one of the sheets via an adhesive, and the intermediate portion is bonded to the inner surface of the back sheet. It is fixed intermittently through the agent. The intermediate part of the auxiliary elastic member extends so as to cross the core in the circumferential direction. A part of both ends of these elastic members is located in the joining region.

  In the wearing article disclosed in the publication, a part of both ends of the waist elastic member, the surrounding elastic member, and the auxiliary elastic member are located in the joining region, so that the wearing article is torn in the longitudinal direction in the joining region. Sometimes both ends of these elastic members become resistance, and the tearing operation may not be performed smoothly.

  An object of the present invention is to provide a pants-type disposable wearing article that can be torn smoothly in a joining region.

  The premise of the present invention for solving the above-mentioned problems is that the front waistline region and the back waistline region facing each other, the crotch region positioned between the waistline regions, both side edges extending in the longitudinal direction, Both front edge portions extending in the lateral direction, and the front waist region and the rear waist region are connected by joint regions extending to both side edges of the waist region, and a waist opening and a pair of leg openings The waist elastic member extending and contracting in the waist direction is attached in a stretched state along the waist opening, and the leg elastic member extending and retracting in the leg extension extends along the leg opening. A pants-type disposable wearing article attached in a state.

  The present invention is characterized in that the waist elastic member is fixed to the first part at the first part of the side edges that are biased inward in the waist direction from the joining region. 1 both ends, and a first intermediate portion that extends between the first ends and is fixed to the edges of both ends. 1 There is no both ends, and the joining region is non-stretchable.

  As an example of an embodiment of the present invention, the leg elastic member is fixed to the second part at the second part of the both side edges that are biased inward in the leg direction from the joint region. And a second intermediate portion that is fixed between both end portions that extend between the second end portions and extend to the crotch region. There is no second end portion of the elastic member for use, and the joining region is non-stretchable.

  As another example of the embodiment of the present invention, an auxiliary elastic member that expands and contracts in the waist direction is attached in an extended state between the waist elastic member and the leg elastic member, and the auxiliary elasticity A member is positioned at a third portion of the side edge portion that is biased inward in the waist direction from the joining region, and extends between the third both end portions fixed to the third portion and the third both end portions. And a third intermediate portion fixed to the front and rear waist region, and in the wearing article, the third end portion of the auxiliary elastic member does not exist in the joining region, and the joining region is non-stretchable. It is.

  As another example of the embodiment of the present invention, the peel strength between the front waistline region and the back waistline region in the joining region is 4 to 40 N with respect to a longitudinal length of 25 mm of the joining region. Is in range.

  According to the pants-type disposable wearing article according to the present invention, both ends of the waist elastic member, the leg elastic member, and the auxiliary elastic member are biased from the joining region toward the waist direction inward and the leg periphery inward. Since both ends of these elastic members do not become resistance, the worn article can be torn smoothly in the joining region at the time of undressing. Since the wearing article is non-stretchable in the wearing article, the article can be easily torn in the joining area as compared with the case where the joining area is stretchable.

  Moreover, in the wearing article, since the peel strength in the joining region is in the range of 4 to 40 N with respect to the length of 25 mm in the longitudinal direction of the joining region, the wearing article is not inadvertently peeled off in the joining region. In addition, a strong force is not required when tearing the worn article in the joining region.

  The details of the pants-type disposable wearing article according to the present invention will be described with reference to the accompanying drawings, taking a pants-type disposable diaper as an example.

  1 and 2 are a partially broken perspective view of the disposable diaper 1 shown from the front waist area 20 side, and a developed plan view of the diaper 1 of FIG. 1 shown from the back sheet 3 side. It is an AA line end elevation of 2.

  The diaper 1 is interposed between the liquid-permeable top sheet 2, the liquid-impervious back sheet 3, the top sheet 2 and the back sheet 3, and the entire surface is covered with a water-permeable tissue paper (not shown). The joined liquid-absorbing core 4 is a main constituent member. The core 4 is joined to at least one inner surface of the top sheet 2 and the back sheet 3 via tissue paper.

  As shown in FIG. 2, the diaper 1 includes a front waistline region 20, a rear waistline region 22, and a crotch region 21 positioned between the front and back waistline regions 20, 22 in the vertical direction. The diaper 1 has both side edges 1a extending in the vertical direction in parallel with each other, and both end edges 1b extending in the horizontal direction in parallel with each other. Both side edge portions 1 a are arcing inwardly in the lateral direction of the diaper 1 in the crotch region 21. The top sheet 2 and the back sheet 3 are fixed in a state in which the portions of the sheets 2 and 3 extending from the peripheral edge of the core 4 outward in the circumferential direction overlap each other. A non-stretchable joint region B1 is formed on both side edges 1a of the front and rear waist regions 20, 22. In the joining region B1, a large number of heat-sealing parts 7 are intermittently arranged in the vertical direction with a required dimension apart. In the diaper 1, a portion surrounding the heat-sealed portion 7 between the imaginary line Z and the side edges 1 c of the front and rear waist regions 20 and 22 is a bonding region B1.

  In the diaper 1, both side edges 1 a of the front and rear waist areas 20, 22 are overlapped with each other, and both side edges 1 a of the waist areas 20, 22 are joined in the joining region B 1. The diaper 1 is defined with a trunk periphery opening 5 that opens upward in FIG. 1 and a pair of leg openings 6 that open toward the left and right in FIG. 1.

  In the diaper 1, a plurality of waistline elastic members 8 extending in the waistline direction X are attached in an extended state along the waistline opening 5, and a plurality of legline elastic members 9 extending in the leg direction Y are legs. Attached in a stretched state along the peripheral opening 6. The waist elastic member 8 and the leg elastic member 9 are interposed between the top sheet 2 and the back sheet 3.

  The waist elastic member 8 includes both end portions 8a (first end portions) positioned at both side edges 1a of the front and rear waist regions 20, 22, and an intermediate portion 8b (first intermediate portion) extending between the both end portions 8a. And have. Both end portions 8a are disposed at a portion B2 (first portion) of both side edge portions 1a that is biased inward from the joining region B1 in the body circumferential direction X. Both end portions 8 a located at the site B <b> 2 are partially fixed to the inner surfaces of the front and back sheets 2, 3 via the adhesive 10. The intermediate portion 8 b is intermittently fixed to the inner surfaces of the front and back sheets 2 and 3 via the adhesive 11.

  The leg-around elastic member 9 includes both end portions 9a (second end portions) located at both side edges 1a of the front and rear waist regions 20, 22, and an intermediate portion 9b (second intermediate portion) extending between the both end portions 9a. And have. Both end portions 9a are arranged at a portion B3 (second portion) of both end edge portions 1b that is biased inwardly in the leg-circumferential direction Y from the joining region B1. Both end portions 9 a located at the site B <b> 3 are partially fixed to the inner surfaces of the front and back sheets 2, 3 via an adhesive 12. The intermediate portion 9 b is intermittently fixed to the inner surfaces of the front and back sheets 2 and 3 via an adhesive 13.

  In the diaper 1, in the presence of the elastic members 8 and 9, both end edges 1 b that define the waist opening 5 have elasticity in the waist direction X, and both side edges that define the leg opening 6. 1a has elasticity in the leg-circumferential direction Y. In FIG. 1, the elastic members 8 and 9 are contracted, and a large number of gathers are formed on both side edge portions 1a and both end edge portions 1b. In the diaper 1, both end portions 8a of the waist elastic member 8 and both end portions 9a of the leg elastic member 9 are not present in the joint region B1, and the joint region B1 is non-stretchable.

  The elastic members 8, 9 are firmly fixed to the inner surfaces of the front and back sheets 2, 3 in order to prevent the both ends 8 a, 9 a from peeling from the front and back sheets 2, 3. ing.

  When the diaper 1 is undressed, the diaper 1 is torn in the longitudinal direction from the waistline opening 5 to the leg periphery opening 6 in the joining region B1. In the diaper 1, since both end portions 8a and 9a of the elastic members 8 and 9 are not present in the joining region B1, only the peel strength of the heat-sealed portion 7 in the joining region B1 is the resistance when the diaper 1 is torn in the joining region B1. It becomes. In addition, when joining area | region B1 has a stretching property, when the diaper 1 is torn in area | region B1, since area | region B1 will extend, it will become difficult to tear. However, since this diaper 1 does not have both ends 8a and 9a of the elastic members 8 and 9 in the joining region B1, and the region B1 is non-stretchable, the region B1 extends when the diaper 1 is torn in the region B1. The diaper 1 can be easily torn in the joining region B1.

  In the diaper 1, the peel strength in the bonding region B1 is in the range of 4 to 40 N with respect to the length of 25 mm in the vertical direction of the region B1. When the peel strength is less than 4 N / 25 mm, the diaper 1 is carelessly peeled off at the joining region B1 when tension is applied in the direction in which the side edges 1a and the edges 1b are widened while the diaper 1 is worn. There is a case. When the peel strength exceeds 40 N / 25 mm, a strong force is required when the diaper 1 is torn in the bonding region B1.

  4 and 5 are a partially broken perspective view of the diaper 1 of another embodiment shown from the front waistline region 20 side, and a development plan view of the diaper 1 of FIG. 4 shown from the back sheet 3 side, 6 is an end view taken along line BB in FIG.

  The diaper 1 is interposed between the liquid-permeable top sheet 2, the liquid-impermeable back sheet 3, and the sheets 2 and 3, and the entire surface is covered and bonded to a water-permeable tissue paper (not shown). The liquid-absorbent core 4 is a main component. The diaper 1 includes a front waistline region 20, a back waistline region 22, and a crotch region 21 positioned between the front and back waistline regions 20 and 22, and both side edges 1a extending in the longitudinal direction in parallel with each other. , And both end edges 1b extending in the lateral direction in parallel with each other. Both side edge portions 1 a are arcing inwardly in the lateral direction of the diaper 1 in the crotch region 21.

  In the diaper 1, both side edges 1 a of the front and rear waist regions 20, 22 overlapping in a palm shape are joined in the joining region B 1. The diaper 1 is defined with a waist opening 5 that opens upward in FIG. 4 and a pair of leg openings 6 that open toward the left and right in FIG. 4.

  The diaper 1 of FIG. 4 is different from that of FIG. 1 as follows. As shown in FIG. 5, the adhesive 17 is applied in the form of dots in the bonding region B1. In the diaper 1, the application area | region of the adhesive agent 17 between the virtual line Z and the side edge 1c of the front-back trunk periphery area | regions 20 and 22 turns into joining area | region B1.

  In the front and rear waist regions 20 and 22 of the diaper 1, in addition to the waist elastic member 8 and the leg elastic member 9, a plurality of members are positioned below the waist elastic member 8 and extend in the waist direction X. The auxiliary elastic member 14 of the strip is attached in an extended state. The auxiliary elastic member 14 is disposed between the waist elastic member 8 and the leg elastic member 9 in the front and rear waist regions 20 and 22 and extends across the core 4 in the waist direction X.

  The auxiliary elastic member 14 includes both end portions 14a (third end portions) located at both side edges 1a of the front and rear waist regions 20, 22, and an intermediate portion 14b (third intermediate portion) extending between the both end portions 14a. Have. Both end portions 14a are arranged at a portion B4 (third portion) of both side edge portions 1a that is biased inward from the joining region B1 in the body circumferential direction X. Both end portions 14 a located at the site B 4 are interposed between the front and back sheets 2 and 3, and are partially fixed to the inner surfaces of the sheets 2 and 3 via the adhesive 15. The intermediate portion 14b is located at the center of the front and rear waist regions 20 and 22 and is interposed between the back sheet 3 and the core 4 and intermittently via an adhesive 16 on at least the inner surface of the back sheet 3 among them. Fixed.

  In the diaper 1, in the presence of the elastic members 8, 9, and 14, both end edge portions 1 b that define the waist opening 5 and the substantially central portions of the front and rear waist areas 20 and 22 expand and contract in the waist direction X. Both side edges 1a defining the leg opening 6 have elasticity in the leg circumference direction Y. In FIG. 4, the elastic members 8, 9, 14 are contracted, and a large number of gathers are formed at both side edge portions 1 a, both end edge portions 1 b, and substantially central portions of the front and rear waist regions 20, 22. In the diaper 1, the both end portions 8 a of the waist elastic member 8, the both end portions 9 a of the leg elastic member 9, and the both end portions 14 a of the auxiliary elastic member 14 do not exist in the joining region B 1, and the joining region B 1 is not stretched. It is sex.

  The auxiliary elastic member 14 attached to the front waistline region 20 is coupled with the waistline elastic member 8 to tighten the circumference of the wearer's waist and function to bring the core 4 into contact with the wearer's skin. . The auxiliary elastic member 14 may be attached to either the front waist area 20 or the back waist area 22 in addition to being attached to the front waist area 20, 22.

  The elastic members 8, 9, 14 prevent both end portions 8 a, 9 a, 14 a from peeling from the front and back sheets 2, 3, so that both end portions 8 a, 9 a, 14 a are formed on the front and back sheets 2, 3. It is firmly fixed to the inner surface.

  When the diaper 1 is undressed, the diaper 1 is torn in the longitudinal direction from the waistline opening 5 to the leg periphery opening 6 in the joining region B1. In the diaper 1, since both end portions 8a, 9a, 14a of the elastic members 8, 9, 14 do not exist in the joining region B1, only the peeling strength of the adhesive 17 in the joining region B1 is when the diaper 1 is torn in the joining region B1. Resistance. In addition, when joining area | region B1 has a stretching property, when the diaper 1 is torn in area | region B1, since area | region B1 will extend, it will become difficult to tear. However, since this diaper 1 does not have both ends 8a, 9a, 14a of the elastic members 8, 9, 14 in the joining region B1, and the region B1 is non-stretchable, when the diaper 1 is torn in the region B1, The region B1 does not extend, and the diaper 1 can be easily torn at the joining region B1. The diaper 1 shown in FIG. 4 has a peel strength in the bonding region B1 in the range of 4 to 40 N with respect to a length of 25 mm in the vertical direction of the region B1, as in FIG.

  As the top sheet 2, a liquid-permeable and non-stretchable sheet such as a nonwoven fabric or an apertured plastic film, preferably a liquid-permeable, hydrophilic and non-stretchable sheet can be used. As the back sheet 3, a hydrophobic nonwoven fabric, a liquid-impervious plastic film, or a laminate sheet of a hydrophobic nonwoven fabric and a plastic film, preferably a gas-permeable liquid-impervious and non-stretchable sheet can be used. . The back sheet 3 is a composite nonwoven fabric (SMS nonwoven fabric) in which both sheet surfaces of a melt-blown nonwoven fabric having high water resistance are sandwiched between sheet surfaces of a spunbond nonwoven fabric having high strength and high flexibility. You can also

  As the nonwoven fabric, those produced by spun lace, needle punch, melt blown, thermal bond, spun bond, chemical bond and the like can be used. As the constituent fibers of the nonwoven fabric, polyolefin-based, polyester-based, polyamide-based fibers, chic-and-syn type or side-by-side type composite fibers made of polyethylene / polypropylene or polyester can be used.

  The elastic members 8, 9, and 14 are elastomers made of natural rubber or synthetic rubber, and any of a thread shape, a filament shape, a film shape, and a belt shape can be used. The elastic member 8 for the waistline and the elastic member 9 for the legs around the diaper 1 shown in FIG. 1 and FIG. 4 are such that both end portions 8a and 9a of the elastic members 8 and 9 are the top sheet 2 and the back surface at the parts B2 and B3. It is continuously fixed to the inner surface of the sheet 3 via adhesives 10 and 12, and the intermediate portions 8 b and 9 b of the elastic members 8 and 9 are bonded to the inner surfaces of the top sheet 2 and the back sheet 3 with the adhesives 11 and 13. It may be fixed continuously. Furthermore, the auxiliary elastic member 14 of the diaper 1 shown in FIG. 4 has its both end portions 14a continuously fixed to the inner surfaces of the top sheet 2 and the back sheet 3 at the portion B4 via an adhesive 15, and its intermediate portion 14b. However, the back sheet 3 and the core 4 may be continuously fixed to at least the inner surface of the back sheet 3 with an adhesive 16.

  The core 4 is a mixture of fluff pulp obtained by pulverizing wood pulp and superabsorbent polymer particles, and is compressed to a required thickness. As the superabsorbent polymer, a starch graft polymer, a modified cellulose, a cross-linked product of a water-soluble polymer, a self-crosslinked alkali metal acrylate, and the like can be used.

  For fixing the sheets 2 and 3 to each other and joining the core 4 to the sheets 2 and 3, use an adhesive such as a hot melt adhesive or a pressure sensitive adhesive, or a heat sealing means such as a heat seal or a sonic seal. Can do. As the adhesives 10, 11, 12, 13, 15, 16, and 17, it is preferable to use a hot melt adhesive. For fixing the elastic members 8, 9, and 14, in addition to the adhesives 10, 11, 12, 13, 15, and 16, a heat fusion technique can be used.

  The present invention can be implemented in training pants, incontinence pants and the like in addition to disposable diapers.

The partial fracture perspective view of the disposable diaper shown from the front waist area side. The expansion | deployment top view of the diaper of FIG. 1 shown from the back sheet | seat side. FIG. 3 is an end view taken along line AA in FIG. 2. The partial fracture | rupture perspective view of the diaper of other embodiment shown from the front waist area side. The expansion | deployment top view of the diaper of FIG. 4 shown from the back sheet | seat side. FIG. 6 is an end view taken along line BB in FIG. 5.

Explanation of symbols

1 Pants-type disposable diapers (pants-type disposable wearing articles)
DESCRIPTION OF SYMBOLS 1a Both-sides edge part 2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 4 Liquid-absorbent core 5 Trunk circumference opening 6 Leg circumference opening 8 Trunk circumference elastic member 8a Both ends (1st both ends)
8b Intermediate part (first intermediate part)
9 Leg elastic member 9a Both ends (second ends)
9b Intermediate part (second intermediate part)
DESCRIPTION OF SYMBOLS 10 Adhesive 11 Adhesive 12 Adhesive 13 Adhesive 14 Auxiliary elastic member 14a Both ends (3rd both ends)
14b Intermediate part (third intermediate part)
15 Adhesive 16 Adhesive 20 Front waist circumference area 21 Inseam area 22 Rear waist circumference area B1 Joining area B2 Part (first part)
B3 site (second site)
B4 site (third site)
X waist circumference direction Y leg circumference direction

Claims (4)

A front waistline region and a back waistline region facing each other; a crotch region located between the waistline regions; both side edges extending in the vertical direction; and both end edges extending in the horizontal direction; For the circumference of the waist, the circumference area and the rear waist area are connected by joint areas extending to both side edges of the waist area to define a waist opening and a pair of leg openings, and expand and contract in the waist direction. In a pants-type disposable wearing article in which an elastic member is attached in an extended state along the waist opening, and a leg-around elastic member that expands and contracts in the direction around the leg is attached in an extended state along the leg opening.
The first elastic member for waistline is located at the first part of the side edge part that is biased inwardly in the waistline direction from the joining region, and is fixed to the first part, and the first both ends A first intermediate portion extending between the portions and fixed to the both end edges,
In the wearing article, the first article of the waist elastic member does not exist in the joining area, and the joining area is non-stretchable. The second elastic member for the leg periphery is located at the second part of the side edge part that is biased inwardly in the leg peripheral direction from the joining region, and is fixed to the second part, and the second both ends A second intermediate part extending between the parts and fixed to both side edges extending to the crotch region;
The wearing article according to claim 1, wherein in the wearing article, the second end portions of the leg-around elastic members are not present in the joining region, and the joining region is non-stretchable. An auxiliary elastic member that expands and contracts in the waistline direction is attached in an extended state between the waistline elastic member and the legliner elastic member, and the auxiliary elastic member extends inwardly in the waist direction from the joining region. A third end portion fixed to the third portion located at the third portion of the both side edge portions biased toward the second side, and extending between the third end portions and fixed to the front and rear waist region. 3 intermediate parts,
The wearing article according to claim 2, wherein in the wearing article, there are no third end portions of the auxiliary elastic member in the joining region, and the joining region is non-stretchable.   4. The peel strength between the front waist area and the rear waist area in the joining region is in a range of 4 to 40 N with respect to a longitudinal length of 25 mm of the joining region. Wearing article as described in.

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