JP4190491B2 - Pants-type disposable diapers - Google Patents

Description

  The present invention relates to a bodily fluid-absorbing wearing article provided with a fastening tape for rounding and discarding after use.

  Japanese Patent Application Laid-Open No. 9-253123 discloses a front and rear diaper having a core interposed between a top sheet and a back sheet, and having a front waistline region, a back waistline region, and a crotch region positioned between both regions. A single fastening tape capable of curling the diaper is attached to the outer surface of one of the back sheets in the waist area, and the longitudinal center of the fastening tape is fixed to the diaper, Disclosed is a disposable diaper whose side ends are folded so as to be stretchable in the directions of the left and right waists. Adhesive zones for holding the folded state are formed on the left and right sides.

  Japanese Patent Application Laid-Open No. 9-253124 discloses a front and rear diapers in which a core is interposed between a top sheet and a back sheet, and each includes a front waistline region, a back waistline region, and a crotch region located between both regions. A fastening tape capable of curling the diaper is attached to the outer surface of any back sheet of the waistline region, and the fastening tape extends in parallel with each other in the waistline direction of the diaper and is spaced apart in the vertical direction Disposable diapers constituted by two strips of adhesive tape are disclosed.

At the time of disposal of these diapers, the fastening tape is wound around the outer peripheral surface of the central portion of the diaper that is rolled laterally from both side edges, and the fastening tape is attached via the adhesive applied to the fastening tape. Fastened to the outer peripheral surface.
JP-A-9-253123 JP-A-9-253124

  The diapers disclosed in these publications can hold the rolled-up state of the diaper by binding the center part of the rolled-up diaper with a fastening tape. However, with these diapers, it is not possible to close the diaper opening around the diaper using fastening tape, so even if the diaper is rolled sideways, the opening around the diaper remains open and excrement remains. And odors may leak from the waist opening.

  The objective of this invention is providing the underpants type disposable diaper which can be rolled up so that excrement and odor may not leak from a trunk periphery opening or a leg periphery opening at the time of disposal.

  The present invention for solving the above-mentioned problems is composed of a liquid-permeable front sheet, a liquid-impervious back sheet, and a liquid-absorbent core interposed between the front and back sheets, and the front trunk is formed in the longitudinal direction. A surrounding area, a rear waist area, and a crotch area located between the front and back waist areas, with both side edges of the front and back waist areas fixed to each other with the topsheet facing inside And a pair of left and right leg openings, and a fastening tape capable of rolling the diaper on the outer surface of the back sheet of the diaper having elastic elasticity in the direction around the openings is attached. To improve the disposable pants-type disposable diaper.

  A feature of the present invention according to an improvement is that the fastening tape is disposed on the both side edge portions in at least one of the front waistline region and the rear waistline region, and each fastening tape is configured on the both side edge portions. A first portion extending in the longitudinal direction in parallel with the second portion and a second portion extending from a required portion of the first portion, and both longitudinal ends of the first portion are open to the waistline The diaper which is fixed to the vicinity of the edge of the leg and the vicinity of the edge of the opening around the leg, and the second part extends from the required part of the first part in the transverse direction intersecting the longitudinal direction and is rounded An engagement area that can be engaged with and disengaged from the outer peripheral surface of the first portion is formed on an inner surface of a central portion of the first portion and an inner surface of the second portion, and the inner surfaces of the first portion and the second portion are Peelable to the outer surface of the back sheet at both side edges via the engagement area It lies in that it is temporarily attached.

  As an example in an embodiment of the present invention, the second portion is folded so as to be able to extend outward in the lateral direction, and the folded state of the second portion is the inner surface of the second portion and the second portion. It is hold | maintained by the said engagement area formed in the required site | part in the outer surface of 2 parts.

  As another example in the embodiment of the present invention, the central portion of the first portion is bent and extended so as to be convex outward in the lateral direction.

  As another example in the embodiment of the present invention, the fastening tape is a non-stretchable plastic sheet having flexibility.

  As another example of the embodiment of the present invention, an adhesive is applied to the engaging area.

  According to the pants-type disposable diaper according to the present invention, the longitudinal ends of the first portion of the fastening tape extending in the longitudinal direction in parallel with both side edges of the diaper are the edges of the waist opening and the leg opening. Since it is connected to the elastic elastic member for the waistline and the elastic elastic member for the leg periphery, which is attached to the part in an extended state, it is fixed to the edge of the opening. When pulled outward in the direction, each elastic member extends laterally outward.

  When each fastening tape is fastened to the outer peripheral surface of the rolled diaper, the rolled state of the diaper is maintained by each fastening tape, and the waist opening and leg opening are closed by the tension of each elastic member. State is maintained. In a rolled diaper, the openings do not open their mouth, and excrement and odor do not leak from the openings.

  In the diaper that is bent and extended so that the fastening tape protrudes outward in the lateral direction, compared to the case where the fastening tape extends in a straight shape, the engaging force on the outer peripheral surface of the diaper can be improved. It can prevent that the fastening tape fastened to the outer peripheral surface of the diaper is inadvertently peeled off.

  In a diaper where the second part extends laterally outward from the center of the first part and is folded so that the second part can extend laterally outward, the second part is the lateral direction of the diaper. Since it does not extend long outwards, the fastening sheet can be attached to the side edges of the diaper and the second portion does not get in the way.

  The details of the pants-type disposable diaper according to the present invention will be described below with reference to the accompanying drawings.

  1 and 2 are a partially broken perspective view of a pants-type disposable diaper 1 shown from the rear waistline region 32 side, and a cross-sectional view taken along line AA in FIG. In FIG. 2, a state in which one fastening tape 12 is peeled from the release sheet 15 is indicated by a virtual line. 3 is a cross-sectional view taken along line BB in FIG. The diaper 1 was 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 was covered and bonded to the water-permeable tissue paper 5. The liquid absorbent core 4 is a main component. The tissue paper 5 is bonded to at least one inner surface of the top sheet 2 and the back sheet 3.

  The diaper 1 has a front waistline region 30, a back waistline region 32, and a crotch region 31 positioned between the front and back waistline regions 30, 32 in the vertical direction. In the diaper 1, both side edges 1 a and 1 b extending in the vertical direction in the front and rear waist areas 30 and 32 overlap each other like a palm, and are fixed and integrated so as not to easily peel off. Leg opening 7 is defined.

  A plurality of waist elastic elastic members 10 are interposed between the top sheet 2 and the back sheet 3 on the entire periphery of the edge 8 of the waist opening 6, and at least one of the top sheet 2 and the back sheet 3. It is attached to the inner surface of the tube in an extended state. On the entire periphery of the edge 9 of the leg opening 7, a plurality of leg elastic elastic members 11 are interposed between the top sheet 2 and the back sheet 3, and at least one of the top sheet 2 and the back sheet 3. It is attached to the inner surface of the tube in an extended state. In the diaper 1, the edges 8 and 9 of the waist opening 6 and the leg opening 7 have elastic stretchability in the direction around the openings 6 and 7. In FIG. 1, the elastic members 10 and 11 are released from the extended state, and gathers are formed along the edges 8 and 9 of the waist opening 6 and the leg opening 7.

  A pair of fastening tapes 12 for holding the rolled-up state of the diaper 1 is disposed on the outer surface of the back sheet 3 at both side edges 1a, 1b of the rear waistline region 32. Each fastening tape 12 is a non-stretchable plastic sheet having flexibility, and branches from the first portion 12a and a first portion 12a extending in the longitudinal direction in parallel with both side edges 1a and 1b of the diaper 1. And a second portion 12b that extends.

The first portion 12a has a longitudinal end portions 12a ₂ and the central portion 12a _1, the central portion 12a ₁ extends by bending to be convex towards outward transversely of the diaper 1. Longitudinal both end portions 12a ₂ of the first portion 12a, like never leads to the elastic member 10, 11 respectively attached to the edges 8, 9 of the waist-opening 6 and the leg-openings 7, easily peeled off Further, it is fixed to the outer surface of the back sheet 3 with an adhesive 14.

The second portion 12b extends toward the central portion 12a ₁ of the first portion 12a toward the lateral direction outside the diaper 1. Central portion 12a ₁ of the inner surface of the first portion 12b and the the inner surface of the second portion 12b is pressure-sensitive adhesive 19 has been applied. The outer surface of the backsheet 3, the central portion 12a ₁ and the second portion 12b and can be kept temporarily wearing plastic release sheet 20 of the first portion 12b is fixed through an adhesive 21, the central portion 12a ₁ of the inner surface of the first portion 12b and the inner surface of the second portion 12b is temporarily adhered peelably via the adhesive 19 on the release sheet 20. At the extended tip of the second portion 12b, a gripping portion 13 to which no adhesive is applied is formed.

  FIG. 4 is a perspective view of the diaper 1 of FIG. 1 rolled up for disposal. The diaper 1 is rounded in the vertical direction from the crotch region 31 toward the waist opening 6 so that the waist opening 6 is on the outside.

The outer peripheral surface of the rolled diaper 1, a first portion 12a and second portion 12b extending outward transversely of the diaper 1 is put Maki, central portion 12a ₁ of the inner surface of the first portion 12b and the second The inner surface of the portion 12 b is fixed to the outer surface of the back sheet 3 via the adhesive 19.

  The rolled diaper 1 maintains the closed state of the waist opening 6 and the leg opening 7 by the tension of the elastic members 10 and 11, and the openings 6 and 7 do not open their mouths. Odor does not leak from these openings 6 and 7.

  5 and 6 are a partially cutaway perspective view of the diaper 1 shown from the side of the rear waist region of another embodiment and a cross-sectional view taken along the line CC of FIG. 5, and FIG. FIG. 5, the state which extended the 2nd part 12b of one fastening tape 12 to the horizontal direction outward is shown with a virtual line. The diaper 1 has a liquid-absorbent core 4 covered and bonded to a tissue paper 5 between a liquid-permeable top sheet 2 and a liquid-impervious back sheet 3, and both sides of the front and rear waist regions 30 and 32. The edge portions 1a and 1b overlap each other like a palm and are integrated so as not to be easily separated to form a waist opening 6 and a pair of left and right leg openings 7.

  A plurality of waistline elastic members 10 are attached to the edge 8 of the waistline opening 6 in the rear waistline region 32 in a stretched state. The leg-around elastic member 11 is attached in an extended state.

  A pair of fastening tapes 12 are disposed on the outer surface of the back sheet 3 at both side edges 1a, 1b of the rear waist region 32. Each fastening tape 12 is a non-stretchable plastic sheet having flexibility, and branches from the first portion 12a and a first portion 12a extending in the longitudinal direction in parallel with both side edges 1a and 1b of the diaper 1. And a second portion 12b that extends.

The first portion 12a includes a longitudinal end portions 12a ₂ and the central portion 12a _1. Longitudinal both end portions 12a ₂ of the first portion 12a, like never leads to the elastic member 10, 11 respectively attached to the edges 8, 9 of the waist-opening 6 and the leg-openings 7, easily peeled off Further, it is fixed to the outer surface of the back sheet 3 with an adhesive 14.

  The second portion 12b extends from the central portion 12a1 of the first portion 12a outward in the lateral direction of the diaper 1 as indicated by a virtual line in FIG. The second portion 12b is folded in two so as to extend outward in the lateral direction. An adhesive 19 is applied to the inner surface and a required portion of the outer surface of the second portion 12 b, and the folded state is held by the adhesive 19. The surface of the second portion 12b that faces the pressure-sensitive adhesive 19 when folded is easily surface-treated. At the extended tip of the second portion 12b, a gripping portion 13 to which no adhesive is applied is formed.

  The fastening tape 12 grips the gripping portion 13 of the second portion 12b with a finger and pulls the second portion 12b outward in the lateral direction of the diaper 1. The second portion 12b is laterally outward of the diaper 1. Extend to.

  FIG. 8 is a perspective view of the diaper 1 of FIG. 5 rolled up for disposal. The diaper 1 is rounded in the vertical direction from the crotch region 31 toward the waist opening 6 so that the waist opening 6 is on the outside.

  A first portion 12 a and a second portion 12 b that extend outward in the lateral direction of the diaper 1 are wound on the outer peripheral surface of the rolled diaper 1, and the inner surface of the second portion 12 b is back via an adhesive 19. It is fixed to the outer surface of the seat 3.

  The rolled diaper 1 maintains the closed state of the waist opening 6 and the leg opening 7 by the tension of the elastic members 10 and 11, and the openings 6 and 7 do not open their mouths. Odor does not leak from these openings 6 and 7. In the diaper 1, the second portion 12 b is folded in two, so that the second portion 12 b does not extend outward in the lateral direction of the diaper 1.

  As the surface sheet 2, a liquid-permeable sheet such as a nonwoven fabric or an apertured plastic film, preferably a liquid-permeable and hydrophilic sheet is 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 sheet is used. Moreover, as the back sheet 3, 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 is used. You can also.

  As the nonwoven fabric, nonwoven fabrics such as spunlace, needle punch, melt blown, thermal bond, spun pond, and chemical bond can be used. As constituent fibers of the nonwoven fabric, polyolefin fibers, polyester fibers, polyamide fibers, polyethylene / polypropylene or polyester composite fibers, and the like can be used.

  The core 4 is a mixture of fluff pulp and superabsorbent polymer particles, and is compressed to a required thickness. Adhesives such as hot-melt adhesives, adhesives, or heat welding techniques are used for joining the core 4, fixing the sheets 2, 3, 15, 20 and the tape 12, and attaching the elastic members 10, 11. be able to.

  As the fastening tape 12, in addition to the non-stretchable plastic sheet, an elastomer such as synthetic rubber or natural rubber having elastic stretchability, or a material in which these elastomers are fixed to a nonwoven fabric in a stretched state is used. You can also. When the fastening tape 12 having extensibility is used, the trunk opening 6 and the leg opening 7 are blocked by the tension of the waist elastic member 10 and the leg elastic member 11 and the tension of the fastening tape 12. The state retention can be improved.

  Each fastening tape 12 may be attached to both side edges 1a, 1b of the front waistline region 30, and one fastening tape 12 is attached to one side edge 1a of the back waistline region 32, The other fastening tape 12 may be attached to the other side edge 1 b of the front waistline region 30.

At least one of the back sheet 3 and the tissue paper 5 is provided so that the longitudinal both ends 12a ₂ of the first part 12a are not easily peeled in a state of being interposed between the back sheet 3 and the tissue paper 5. It may be fixed to.

  The waist elastic member 10 may be attached in an extended state along the edge 8 of the waist opening 6 in at least one of the front waist area 30 and the back waist area 32, but the fastening tape 12 Needs to be arranged on both side edges 1a and 1b of the waistline region to which the waistline elastic member 10 is attached.

  When the back sheet 3 is formed of a non-woven fabric, a hook member can be attached in addition to applying an adhesive to the fastening tape 12. The fastening tape 12 is engaged with the outer surface of the back sheet 3 by the hook member being caught by the nonwoven fabric fibers. When the hook member is used, a loop member can be used as the release sheet.

The partial fracture | rupture perspective view of the underpants type disposable diaper shown from the back waist circumference region side. AA sectional view taken on the line AA of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 1. FIG. 2 is a perspective view of the diaper of FIG. 1 rolled up for disposal. The partial fracture | rupture perspective view of the underpants type disposable diaper shown from the back waist circumference region side about other embodiment. The CC sectional view taken on the line of FIG. The DD sectional view taken on the line of FIG. FIG. 6 is a perspective view of the diaper of FIG. 5 rolled up for disposal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper 1a, 1b Both-sides edge part 2 Liquid-permeable surface sheet 3 Liquid-impermeable back sheet 5 Liquid-absorbent core 6 Trunk opening 7 Leg opening 8 Edge 9 Edge 10 Elastic stretching for trunk circumference 11 Elastic member for leg circumference 12 Fastening tape 12a First part 12a ₁ Center part 12a ₂ Both longitudinal ends 12b Second part 30 Front waist area 31 Inseam area 32 Rear waist area

Claims (5)

It is composed of a liquid-permeable surface sheet, a liquid-impermeable back sheet, and a liquid-absorbent core interposed between the front and back sheets, and a front waist area, a back waist area, A crotch region located between the waist region, and both side edges of the front and back waist region are fixed to each other with the top sheet facing inward to define a waist opening and a pair of left and right leg openings. In a pants-type disposable diaper in which a fastening tape capable of rolling the diaper on the outer surface of the back sheet of the diaper having elastic elasticity in the direction around the openings is attached,
The fastening tape is disposed at the side edge portions in at least one of the front waistline region and the rear waistline region, and each fastening tape extends in the longitudinal direction in parallel with the side edge portions. A first portion and a second portion extending from a required portion of the first portion and extending from the required portion, both longitudinal ends of the first portion are located near an edge of the waist opening and the leg opening. Fixed to the vicinity of the edge of
The second portion extends from the required portion of the first portion in the lateral direction intersecting the longitudinal direction, and an engagement area that can be engaged with and disengaged from the outer peripheral surface of the rounded diaper is provided on the first portion. Formed on the inner surface of the central portion and the inner surface of the second portion, the inner surfaces of the first portion and the second portion are separated from the outer surface of the back sheet at the side edge portions via the engagement area. The diaper characterized by being temporarily attached.   The second portion is folded so as to extend outward in the lateral direction, and the folded state of the second portion is an inner surface of the second portion and a required portion on the outer surface of the second portion. The diaper according to claim 1, which is held by the formed engagement area.   The diaper according to claim 1 or 2, wherein the first portion is bent and extended so that a central portion thereof is convex outward in the lateral direction.   The diaper according to any one of claims 1 to 3, wherein the fastening tape is a non-stretchable plastic sheet having flexibility.   The diaper according to claim 1, wherein an adhesive is applied to the engagement area.

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