WO2015001826A1 - パンツ型の着用物品 - Google Patents
パンツ型の着用物品 Download PDFInfo
- Publication number
- WO2015001826A1 WO2015001826A1 PCT/JP2014/060137 JP2014060137W WO2015001826A1 WO 2015001826 A1 WO2015001826 A1 WO 2015001826A1 JP 2014060137 W JP2014060137 W JP 2014060137W WO 2015001826 A1 WO2015001826 A1 WO 2015001826A1
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- WIPO (PCT)
- Prior art keywords
- region
- waist
- elastic
- rear waist
- longitudinal direction
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/49007—Form-fitting, self-adjusting disposable diapers
- A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
- A61F13/49011—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
Definitions
- the present invention relates to a pants-type wearing article.
- Patent Document 1 includes a chassis including a front and rear waist region, a crotch region, and a liquid-absorbing core, and a plurality of string-like or strand-like waist elastic bodies extending in the lateral direction are provided in the front and rear waist region.
- a wearing article arranged in a stretchable and contracted state is disclosed.
- the elastic region (hereinafter referred to as the first) is a region outside the longitudinal direction (longitudinal direction) of the liquid-absorbent core and is located between the waist opening edge of the front waist region and the liquid-absorbent core in the longitudinal direction. 1 region), and an elastic region (hereinafter referred to as a second region) that faces the first region in the front-rear direction and is positioned between the waist opening edge of the rear waist region and the liquid-absorbent core in the longitudinal direction.
- the separation dimension (pitch) of the waist elastic bodies adjacent in the first region and the separation dimension of the waist elastic bodies adjacent in the second region are set to be equal. Thereby, the bending rigidity in the vertical direction of the first region and the second region is substantially equal.
- the longitudinal bending stiffness in the first region is set to be relatively low, so that when worn, the edge of the waist opening is expanded in the first region.
- the chassis is bent and it becomes easy to hook a finger, and the wearing operation is simplified.
- the second region has a relatively low bending rigidity substantially equal to the first region, so that the region is bent and the edge of the waist opening is in contact with the wearer's thigh.
- a so-called “tap” state occurs in a part of the chassis in the second region when it is difficult to pull it up as it hits the step with the buttocks.
- an object of the present invention is an improvement of the conventional technique, which is easy to wear and can smoothly raise the rear waist region, so-called "trick" to a part of the rear waist region.
- An object of the present invention is to provide a pants-type wearing article that does not cause a state.
- the present invention provides a longitudinal direction and a lateral direction, a skin facing surface and a non-skin facing surface located on the opposite side, a front waist region, a rear waist region, and the front and rear waist regions.
- a chassis including a liquid-absorbing core extending from the crotch region to the front and rear waist region, and a waist opening and a pair of legs defined by connecting both side edges of the front and rear waist region
- An improvement of a pants-type wearing article including an opening.
- the 1st invention in this invention is the said wearing article WHEREIN:
- the said liquid-absorbent core has the front-end edge and rear-end edge which are spaced apart and opposed in the said vertical direction, and extend in the said horizontal direction,
- the said front waist region is A plurality of front waist elastic bodies attached in a stretched state between both side edges of the front waist region so as to be contractible in the lateral direction, and the front waist elastic bodies are disposed, and edges of the waist openings
- a first region located between the front end edge of the liquid-absorbent core, and the rear waist region can be contracted in the lateral direction in a stretched state between both side edges of the rear waist region.
- a plurality of attached rear waist elastic bodies a second region in which the rear waist elastic bodies are disposed and located between an edge of the waist opening and the rear end edge of the liquid-absorbent core; And the first region and the second region are The front waist elastic bodies are located opposite to each other in the front-rear direction of the use state, and the number of the rear waist elastic bodies in the second region is larger than the number of the front waist elastic bodies in the first region, A longitudinal separation dimension of the rear waist elastic bodies adjacent to each other is smaller than a longitudinal separation dimension of the front waist elastic bodies adjacent to each other in the first region.
- 2nd invention in this invention is the said wearing article
- the said liquid-absorbent core has the front-end edge and rear-end edge which are spaced apart and opposed in the said vertical direction, and extend in the said horizontal direction
- the region has a first region located between the edge of the waist opening and the front end edge of the liquid-absorbent core and spans the entire region between both side edges of the front waist region, and the rear waist
- the region is located between the edge of the waist opening and the rear end edge of the liquid-absorbent core, and has a second region over the entire area between both side edges of the rear waist region
- the first region and the second region are located opposite to each other in the front-rear direction of the wearing state, and the bending rigidity in the longitudinal direction of the second region is the bending rigidity in the longitudinal direction of the first region. It is characterized by being higher than.
- the front waist region is arranged with the front waist elastic body, and the edge of the waist opening and the liquid-absorbent core
- the rear waist region is located opposite the first region in the front-rear direction of the wearing state, the rear waist elastic body is disposed, and the waist opening Having a second region located between the edge and the rear edge of the liquid-absorbent core, the number of rear waist elastic bodies in the second region being greater than the number of front waist elastic bodies in the first region;
- the longitudinal separation dimension of the rear waist elastic bodies adjacent to each other in the second region is smaller than the longitudinal separation dimension of the front waist elastic bodies adjacent to each other in the first region.
- the bending rigidity in the vertical direction is lower than that in the second region, and when the edge of the waist opening is expanded, it is easy to hook a finger on the chassis and the wearing operation is easy.
- the bending rigidity in the vertical direction is higher than that in the first region, and the chassis is difficult to be bent.
- the rear waist region can be smoothly raised.
- the bending rigidity in the longitudinal direction of the second region located in the rear waist region is the first located in the front waist region. It is higher than the bending stiffness in the longitudinal direction of the region. Therefore, when the edge of the waist opening is widened, it is easy to hook a finger on the chassis in the first region and the wearing operation is easy. In the second region, the chassis is not easily bent, and so-called “ It is possible to prevent the “waist” state from occurring and smoothly raise the rear waist region.
- FIG. 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 1.
- FIG. 11 is a schematic cross-sectional view taken along line XI-XI in FIG. 10. The top view similar to FIG. 2 of the diaper in 2nd Embodiment. The disassembled perspective view similar to FIG. 3 of the diaper in 2nd Embodiment.
- the following embodiment relates to a pants-type wearing article shown in FIGS. 1 to 4 as an example of the present invention, and includes not only an indispensable structure of the invention but also a selective and preferable structure.
- each elastic body which will be described later, resists the contraction force, and the gathers generated in the members to which the elastic bodies are attached by the contraction force in the horizontal direction X and the vertical direction Y are substantially reflected by natural vision. It has been stretched to such an extent that it seems to be lost.
- a disposable pant-type diaper 10 which is an example of a pant-type wearing article according to the present invention includes a vertical direction Y and a horizontal direction X that are orthogonal to each other, a skin facing surface, and a non-surface on the opposite side. It has a skin facing surface, a vertical axis P that bisects the length dimension in the horizontal direction X, and a horizontal axis Q that bisects the length dimension in the vertical direction Y, and is substantially symmetrical with respect to the vertical axis P.
- the front waist region 11, the rear waist region 12, and the crotch region 13 located between the front waist region 11 and the rear waist region 12 are included.
- the diaper 10 includes a chassis 14 in the form of a base.
- the chassis 14 has a concave curved shape on both side edges defining the crotch region 13, and the narrowest part of the crotch region 13 is in front of the horizontal axis Q.
- Located on the waist region 11 side The front side edges 11a and 11b of the front waist region 11 and the rear side edges 12a and 12b of the rear waist region 12 have side edges that face each other in the longitudinal direction Z of the diaper 10 intermittently extending in the longitudinal direction Y.
- a waist opening 23 and a pair of leg openings 24 are defined.
- the overlapping sheets are fused together by a known means such as embossing / debossing by heat or ultrasonic waves.
- the chassis 14 is located on the skin facing surface, is located on the non-skin facing surface side, and is separated from each other in the longitudinal direction Y, with the base sheet 25 made of a fiber nonwoven fabric defining the front and rear waist regions 11 and 12 and the crotch region 13 in series.
- the front waist sheet 26 and the rear waist sheet 27 made of a nonwoven fabric are opposed to each other, and the liquid absorbing structure 15 is located on the skin facing surface side of the base sheet 25 and extends from the crotch region 13 to the front and rear waist regions 11 and 12. .
- the base sheet 25 includes first and second end edges 25a and 25b that are spaced apart in the vertical direction Y, and both side edges 25c and 25d that are spaced apart in the horizontal direction X. Both side edges 25c and 25d are a straight portion in the front and rear waist regions 11 and 12, and a curved portion that protrudes deeper from the rear waist region 12 side toward the front waist region 11 side toward the vertical axis P in the crotch region 13. Formed from.
- the front waist seat 26 has a substantially trapezoidal shape that forms the front waist region 11 and a part of the crotch region 13, and extends in the longitudinal direction Y, with an intermediate inner edge 26 a and an outer edge 26 b extending in the lateral direction X. Both outer edges 26c and 26d, and both inner edges 26e and 26f connecting both outer edges 26c and 26d and the intermediate inner edge 26a are formed. The inner side edges 26e and 26f on both sides have a straight part extending straight from the outer edges 26c and 26d in the lateral direction X and a curved part extending from the straight part to the intermediate inner edge 26a.
- the front waist sheet 26 has a bent portion 33 that is bent inward along the waist opening edge.
- the bent portion 33 is bent inward along the first end edge 25a of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.
- the rear waist sheet 27 has a substantially trapezoidal shape that forms the rear waist region 12 and a part of the crotch region 13, and extends from the intermediate inner edge 27a and the outer edge 27b extending in the lateral direction X, and from the outer edge 27b. Both outer edges 27c, 27d extending in the vertical direction Y, and both inner edges 27e, 27f connecting the outer edges 27c, 27d and the intermediate inner edge 27a in a curved shape are formed.
- the rear waist sheet 27 has a bent portion 38 that is bent inward along the waist opening edge.
- the bent portion 38 is bent inward along the second end edge 25b of the base sheet 25 in a state where the liquid absorbing structure 15 is disposed on the inner surface of the base sheet 25, and the base sheet 25 and the liquid absorbing structure 15 are thus bent. Fixed to the skin facing surface.
- a front waist elastic body 72 extending in the lateral direction X in the front waist region 11 is attached between the front waist sheet 26 and the base sheet 25 so as to be contractable in an extended state.
- a rear waist elastic body 74 extending in the lateral direction X in the rear waist area 12 and a buttocks elastic body extending in a curved shape from the rear waist area 12 toward the crotch area 13 76 is attached to be retractable in the extended state.
- the front and rear waist regions 11 and 12 have front and rear waist elastic regions 71 and 73 that can be elastically expanded and contracted by disposing each elastic body.
- the base sheet 25 and the front and back waist sheets 26 and 27 have a mass of about 10 to 40 g / m 2 and a fiber density of about 0.03 to 0.10 g / cm 3 , for example, spunbond fiber nonwoven fabric, SMS (Spunbond / meltblown / spunbond)
- SMS spunbond / meltblown / spunbond
- a fiber nonwoven fabric, an air-through fiber nonwoven fabric, a plastic sheet, or a laminate sheet thereof can be used.
- the base sheet 25 has a mass of about 10 to 18 g / m 2 , preferably a mass of about 13 g / m 2
- the front and back waist sheets 26 and 27 have a mass of about 15 to 25 g / m 2 , preferably A spunbond fiber nonwoven fabric having a mass of about 20 g / m 2 can be used.
- the outer surfaces of the front and rear waist sheets 26 and 27 are optionally subjected to a grid-like embossing / debossing process, and an uneven pattern 28 is arranged.
- the central portion 13C of the crotch region 13 is formed only from the base sheet 25, but may be formed from a plurality of sheets.
- the dimension L1 in the longitudinal direction Y of the diaper 10 is about 600 to 1000 mm
- the dimension W1 in the lateral direction X is about 400 to 800 mm
- the front waist region 11 The dimension L2 in the longitudinal direction Y of the front edge portions 11a and 11b (the same as the dimension in the longitudinal direction Y of the rear edge portions 12a and 12b of the rear waist region 12) is about 80 to 150 mm.
- the liquid absorbing structure 15 includes a front end edge 15 a and a rear end edge 15 b that are separated from each other in the vertical direction Y and extend in the horizontal direction X, and are separated from each other in the horizontal direction X in the vertical direction Y. And a front end portion 16A, a rear end portion 16B, and a central portion 16C located between the front and rear end portions 16A and 16B.
- the liquid-absorbing structure 15 is located on the skin-facing surface side, and is a body-side liner 50 made of a fiber nonwoven fabric having liquid permeability, a liquid-absorbing absorbent body 51 having curved side edges, and a pair of barrier cuffs.
- the absorbent body 51 includes, for example, a liquid absorbent core formed from a mixture of fluff pulp and absorbent polymer particles, and a liquid absorbent diffusible core wrap sheet such as tissue paper that encapsulates the entire liquid absorbent core.
- the liquid-absorbent core has a front end edge 58a extending in the lateral direction X in the front waist region 11, and a rear end edge 58b that is spaced apart from the front end edge 58a in the longitudinal direction Y and extends in the lateral direction X in the rear waist region.
- the body side liner 50, the barrier cuff sheet 52, and the leakage preventing sheet 53 form end flaps 56a and 56b extending in the longitudinal direction Y from the front end edge 58a and the rear end edge 58b of the liquid-absorbent core, respectively.
- the liquid absorbing structure 15 and the base sheet 25 are joined to each other via a joining region 60 formed from a known joining means such as a hot melt adhesive applied to at least one of the facing surfaces.
- the bonding area 60 is configured by a plurality of bonding sites spaced in the longitudinal direction Y, but may be a continuous bonding area so as to bond the entire back surface of the liquid absorbing structure 15. .
- the pair of barrier cuff sheets 52 are folded in two and the inner surfaces are fixed to each other, and are fixed to the skin facing surface of the body side liner 50 and are spaced apart from each other in the longitudinal direction Y. It has a front fixed portion and a rear fixed portion, a fixed side edge portion 52b extending in the vertical direction Y, and a free side edge portion 52a located inside the horizontal direction X from the fixed side edge portion 52b.
- a cuff elastic body 57 made of a string-like or strand-like elastic material and extending in the longitudinal direction Y is attached to the free side edge portion 52a of the barrier cuff sheet 52 so as to be contracted in an extended state.
- the leak-proof sheet 53 is formed from a liquid-impervious fiber nonwoven fabric, a liquid-impervious and moisture-permeable plastic film, or a laminate sheet thereof, and is disposed so as to cover at least substantially the entire lower surface of the absorbent body 51. The body fluid is prevented from leaking from the non-skin facing surface (bottom surface) side of the liquid absorbing structure 15.
- the front waist elastic region 71 includes a front outer elastic region 71A extending in the lateral direction X at the edge of the waist opening 23, a front inner elastic region 71C extending in the horizontal direction X on the crotch region 13 side, and the longitudinal direction of the liquid-absorbing core.
- a front intermediate elastic region (first region) 71B located on the Y outer side and between the front outer elastic region 71A and the front inner elastic region 71C.
- the rear waist elastic region 73 includes a rear outer elastic region 73A that extends in the lateral direction X at the edge of the waist opening 23, and a rear waist region that is positioned outside the longitudinal direction Y of the liquid-absorbent core and extends in the lateral direction X on the crotch region 13 side. It has an inner elastic region 73C and a rear intermediate elastic region (second region) 73B located between the rear outer elastic region 73A and the rear inner elastic region 73C.
- second region rear intermediate elastic region
- the front outer elastic region 71A and the rear outer elastic region 73A, and the front intermediate elastic region 71B and the rear intermediate elastic region 73B are each worn Are opposed to each other in the front-rear direction Z.
- at least the front intermediate elastic region 71B and the rear intermediate elastic region 73B need only be positioned to face each other in the front-rear direction Z.
- the front and rear intermediate elastic regions 71B and 73B are located at a distance of at least about 50 mm from the waist opening 23 and at least about 50 mm when the longitudinal Y dimension of the front and rear waist regions 11 and 12 is about 140 mm. Width dimension (dimension in the longitudinal direction Y). Since the front and rear intermediate elastic regions 71B and 73B are separated from the waist opening 23 by at least about 50 mm, when the diaper 10 is worn, the front outer elastic region 71A is grasped by hand so as to be wound by hand on the front waist region 11 side.
- the front and rear intermediate elastic regions 71B and 73B have front and rear end edges 15a and 15b of the liquid absorbing structure 15 in which the bending rigidity in the longitudinal direction Y changes in the front and rear waist regions 11 and 12, respectively. It is preferably located in the vicinity.
- the term “Takeru” means that a part of the article moves while wearing, resulting in a relatively large wrinkle / wrinkle (see FIG. 7).
- the front waist elastic body 72 can be formed from a string-like or strand-like elastic material.
- the front waist elastic body 72 located in the front outer elastic region 71A is composed of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is extended about 1.8 to 3.5 times, and the longitudinal direction It is preferable that they are arranged at a distance of about 3 to 15 mm in Y. In this embodiment, they are made of five elastic materials having a fineness of about 620 dtex and an expansion ratio of about 2.3 times, and about 6 mm in the longitudinal direction Y. They are arranged at intervals.
- the front waist elastic body 72 located in the front intermediate elastic region 71B is positioned so as to overlap with the end flap 56a of the liquid absorbing structure 15 in a plan view, and has a fineness of 300 to 1000 dtex, about 1.8 to 3.5 times. It is preferably made of a plurality of elastic materials arranged in a stretched state, and is preferably spaced apart from each other by about 3 to 15 mm in the longitudinal direction Y. In this embodiment, the fineness is about 470 dtex and the stretching magnification is about It consists of four elastic materials which are 2.3 times, and is spaced apart in the longitudinal direction Y by about 10 mm.
- the front waist elastic body 72 located in the front inner elastic region 71C is made of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is extended about 1.8 to 3.5 times, and the longitudinal direction It is preferable that they are arranged at a distance of about 5 to 20 mm in Y, and in this embodiment, they are made of 10 elastic materials having a fineness of about 780 dtex, and the stretching magnification is about 2.5 times. About 10 mm apart from each other.
- the rear waist elastic body 74 can be formed from a string-like or strand-like elastic material.
- the rear waist elastic body 74 located in the rear outer elastic region 73A is made of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is stretched about 1.8 to 3.5 times. It is preferable that they are arranged at a distance of about 3 to 15 mm in Y, and in this embodiment, they are made of five elastic materials having a fineness of about 620 dtex and an expansion ratio of about 2.3 times, and are spaced by 6 mm in the longitudinal direction Y. Are spaced apart.
- the rear waist elastic body 74 located in the rear intermediate elastic region 73B is composed of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is stretched by about 1.8 to 3.5 times. It is preferable that they are arranged apart from each other by about 3 to 15 mm in Y, and in this embodiment, they are made of six elastic materials having a fineness of about 780 dtex and an expansion ratio of about 2.1 times. 7 mm apart.
- the rear waist elastic body 74 located in the rear inner elastic region 73C is composed of a plurality of elastic materials arranged in a state where the fineness is 300 to 1000 dtex and is stretched about 1.8 to 3.5 times.
- they are arranged at about 5 to 20 mm apart from each other in Y.
- they are made of four elastic materials having a fineness of about 780 dtex and an expansion ratio of about 2.5 times, and about 15 mm in the longitudinal direction Y. They are spaced apart from each other.
- the chassis 14 has a buttocks elastic region 75 extending from the rear waist region 12 to the crotch region 13.
- the collar elastic region 75 is attached to a plurality of collar elastic bodies 76 extending in a curved shape toward the horizontal axis Q so as to be contracted in an extended state.
- the buttocks elastic body 76 can be formed of a plurality of string-like or strand-like elastic materials having a fineness of about 500 to 800 dtex and an extension ratio of about 1.0 to 2.5.
- the separation dimension (pitch) in the longitudinal direction Y of the rear waist elastic body 74 disposed in the rear intermediate elastic region 73B is larger than the separation dimension in the longitudinal direction Y of the front waist elastic body 72 disposed in the front intermediate elastic region 71B. Is also small.
- the “separation dimension in the longitudinal direction Y of each elastic body” refers to the dimension in the longitudinal direction Y in the non-existing region of the elastic body formed between the elastic bodies adjacent to each other in the longitudinal direction Y.
- the number of the rear waist elastic bodies 74 is larger than the number of the front waist elastic bodies 72, This can be realized by adopting a configuration in which the fineness (thickness) is larger than the fineness of the front waist elastic body 72.
- the number of the rear waist elastic bodies 74 in the rear intermediate elastic region 73B is larger than the number of the front waist elastic bodies 72 in the front intermediate elastic region 71B, and the longitudinal direction Y of the rear waist elastic body 74 in the rear intermediate elastic region 73B.
- the bending rigidity in the longitudinal direction Y of the rear intermediate elastic region 73B (that is, the bending in which a folding line extending in the horizontal direction X is formed) Is relatively higher than the bending rigidity in the longitudinal direction Y of the front intermediate elastic region 71B.
- the string-like or strand-like front and rear waist elastic bodies 72 and 74 in the front and rear waist regions 11 and 12, when the rear waist region 12 is pulled up to the waist through the wearer's buttocks, the rear waist region
- the front and rear waist regions 11 and 12 can be pressed against the skin of the wearer without causing a so-called “flickering” state in FIG. 12, and the fit of the diaper 10 can be prevented and improved.
- the fineness of the rear waist elastic body 74 of the rear intermediate elastic region 73B is the front waist of the front intermediate elastic region 71B.
- Settings such as using a larger elastic body 72 can be employed.
- the rear intermediate elastic region 73B has an element that has higher bending rigidity in the longitudinal direction Y than the front intermediate elastic region 71B.
- the number of the rear waist elastic bodies 74 is set to the front waist elastic body 72. If the former pitch is inevitably smaller than that of the latter, it is formed in the non-elastic portion (the non-existing region of the elastic member) between the rear waist elastic bodies 74 and is longitudinally formed.
- the number of gather rows extending in the transverse direction X that hinders bending in Y is the number of gather rows extending in the transverse direction X formed in the non-elastic portion between the front waist elastic bodies 72 (the non-existence region of the elastic member).
- the former Since the number is larger than the number, it can be said that the former has higher bending rigidity than the latter.
- a relatively small gather is formed in the non-elastic portion between the rear waist elastic bodies 74, whereas a relatively large gather is formed in the non-elastic portion between the front waist elastic bodies 71. It can be said that the bending rigidity is higher than that of the latter.
- FIG. 7 is an explanatory view showing a state when wearing a diaper 110 showing an example of a conventional pants-type wearing article
- FIG. 8 is an explanatory view showing a state when wearing the diaper 10 of the present embodiment. It is.
- the same string-like or strand-like elastic material is used as the front waist elastic body and the rear waist elastic body 174 and is disposed in the front intermediate elastic region 171 ⁇ / b> B of the front waist region.
- the number of the front waist elastic bodies is set to be the same as the number of the rear waist elastic bodies 174 disposed in the rear intermediate elastic area 173B of the rear waist area.
- the pitch of the front waist elastic body is substantially equal to the pitch of the rear waist elastic body 174, and the bending rigidity of the front intermediate elastic region 171B is relatively low.
- the front intermediate elastic region 171B can be bent and hooked with a finger to facilitate the pulling operation.
- the rear intermediate elastic region 173B is also separated from the front intermediate elastic region 171B.
- the rear outer elastic region 173A is bent and hits the step 79 between the thigh 77 and the buttocks 78, making it difficult to pull up, and the diaper 110 cannot be pulled up smoothly.
- the rear middle elastic region 173B is bent and the pulling up of the diaper 110 is suppressed, so that the rear inner elastic region 173C is easily bent. If the rear waist region is forcibly raised in such a state, the rear intermediate elastic region 173B remains “warped”, which not only impairs the feeling of wearing, but may also cause excrement leakage.
- the front and rear waist elastic bodies 72 and 74 are formed of the same string-like or strand-like elastic material, and the rear intermediate elastic region 73B.
- the number of the rear waist elastic bodies 74 disposed in the front is larger than that of the front waist elastic body 72 disposed in the front intermediate elastic region 71B. Therefore, since the bending stiffness in the longitudinal direction of the rear intermediate elastic region 73B is higher than the bending stiffness in the longitudinal direction of the front intermediate elastic region 71B, when the waist opening 23 of the diaper 10 is widened when worn.
- the front intermediate elastic region 71B can be bent and hooked with a finger, and the lifting operation is facilitated.
- the rear intermediate elastic region 73B does not bend by resisting the action of bending the front intermediate elastic region 71B so as to be bent.
- the entire body can be pulled up while being fitted to the wearer's body, and there is no possibility that the rear outer elastic region 73A will be caught by the step 79 between the thigh 77 and the heel 78.
- the rear inner elastic region 73C is pulled up smoothly without being bent by taking advantage of the rear intermediate elastic region 73B. Since the rear waist region 12 can be pulled up and worn smoothly in this way, there is no possibility that a part of the rear waist region will “torn” and the feeling of wear will decrease, or excrement may leak.
- the bending rigidity in the vertical direction of both the regions 171B and 173B is substantially equal.
- the rear waist region may be displaced to cause a decrease in wearing feeling
- the front intermediate elastic region may be adjusted by adjusting various settings such as the number of the front waist elastic body and the rear waist elastic body 174, the pitch, and the fineness.
- the diaper 110 is worn when the longitudinal bending rigidity of the 171B is set to be the same as the bending rigidity of the rear intermediate elastic area 173B so that the rear intermediate elastic area 173B does not “fold” or higher than the bending rigidity of the rear intermediate elastic area 173B.
- the entire front waist area fits into the abdomen, making it difficult to grasp when pulling up, reducing operability and causing discomfort by squeezing the abdomen.
- the number of front waist elastic bodies 72 arranged in the front intermediate elastic area 71B is larger than that of the rear waist elastic bodies 74 arranged in the rear intermediate elastic area 73B.
- the diaper 10 Since the correlation between the bending stiffness in the longitudinal direction Y of the intermediate elastic region 71B and the bending stiffness in the longitudinal direction Y of the rear intermediate elastic region 73B is the front intermediate elastic region 71B ⁇ the rear intermediate elastic region 73B, the diaper 10 A plurality of technical effects can be obtained, such as prevention of a decrease in wearing operability and wearing feeling, and prevention of leakage of excrement.
- FIG. 9 is an explanatory view showing a collection part of the test piece 40 in the rear waist region 12.
- the test piece 40 is clamped at both ends 41 and 42 in the longitudinal direction (longitudinal direction Y) by 10 mm with a pair of chucks of the test machine, and one of the chucks is rotated around the other chuck, and the test piece is bent.
- the bending stiffness of 40 is measured with a torque tester. The rotation speed was 30 rpm, the rotation angle was 50 degrees, and the measurement angle was 40 degrees.
- Five test pieces were prepared for each of the front and rear waist regions 11 and 12 (Examples 1 to 5), and the average value of these measured values (torque strength) (unit: mN ⁇ m) was averaged in the longitudinal direction Y. The stiffness value was used.
- the front and rear waist regions 11 and 12 to be measured have front and rear waist elastic bodies 72 and 74 attached in an extended state
- the front and rear waist elastic bodies 72 and 74 are cut when the test piece is cut from the diaper 10.
- the dimensions were measured in a state where the front and rear waist regions 11 and 12 were pulled in the vertical direction Y and the horizontal direction X against the contraction force.
- the bending rigidity value B1 of the rear intermediate elastic region 73B was higher than the bending rigidity value B2 of the front intermediate elastic region 71B.
- the bending rigidity in the longitudinal direction Y of the front and rear intermediate elastic regions 71B and 73B can be measured by comparing a test piece prepared according to the above standard based on the JIS L1096 19.1A method (45 ° cantilever method).
- the elongation stress of each elastic region is about 2.5N for the front outer elastic region 71 and about 2.N for the front intermediate elastic region 71B. 5N, the front inner elastic region 71C is set to about 5.0N, the rear outer elastic region 73A is set to about 2.5N, the rear intermediate elastic region 73B is set to about 3.0N, and the rear inner elastic region 73C is set to about 5.0N.
- the extension stress of the rear intermediate elastic region 73B is It becomes higher than the elongation stress of the elastic region 71B.
- the difference in elongation stress between the front outer elastic region 71A and the front intermediate elastic region 71B is about 0 to 3.0 N
- the difference in elongation stress between the front intermediate elastic region 71B and the front inner elastic region 71C is about 0.5 to 3.
- the difference in elongation stress between the rear outer elastic region 73A and the rear intermediate elastic region 73B is approximately 0 to 3.0N
- the difference in elongation stress between the rear intermediate elastic region 73B and the rear inner elastic region 73C is approximately 1.0 to 5.N. 0N.
- the chassis 14 is easily bent at a portion where the extension stress changes relatively greatly, but by setting the difference in extension stress between the rear outer elastic region 73A and the rear intermediate elastic region 73B to 3.0 N or less, Occurrence of bending of the chassis 14 at the boundary portion between the rear outer elastic region 73A and the rear intermediate elastic region 73B can be suppressed.
- the number and pitch of the front waist elastic bodies 72 are adjusted so that the elongation stress of the front intermediate elastic region 71B is that of the front outer elastic region 71A. It is more preferable to make it lower.
- the separation dimension R1 in the longitudinal direction Y of the innermost front waist elastic body 72a in the longitudinal direction Y of the front outer elastic region 71A and the outermost front waist elastic body 72b in the longitudinal direction Y of the front intermediate elastic region 71B is In this embodiment, it is about 16 mm.
- a separation dimension R2 in the longitudinal direction Y of the innermost front waist elastic body 72c in the longitudinal direction Y of the front intermediate elastic region 71B and the outermost front waist elastic body 72d in the longitudinal direction Y of the front inner elastic region 71C is about 5 to 15 mm. It is preferable that it is about 10 mm in this embodiment. Referring to FIG.
- the separation dimension R3 in the longitudinal direction Y of the innermost rear waist elastic body 74a in the longitudinal direction Y of the rear outer elastic region 73A and the outermost rear waist elastic body 74b in the longitudinal direction Y of the rear intermediate elastic region 73B is About 5 to 15 mm, and in this embodiment, about 7 mm.
- the separation dimension R4 in the longitudinal direction Y of the innermost rear waist elastic body 74c in the longitudinal direction Y of the rear intermediate elastic region 73B and the outermost rear waist elastic body 74d in the longitudinal direction Y of the rear inner elastic region 73C is about 10 to 25 mm. It is preferable that it is about 15 mm in this embodiment.
- each elastic body refers to the dimension in the longitudinal direction Y of the non-existing region of the elastic body located between the elastic bodies adjacent to each other.
- the separation dimension R3 in the longitudinal direction Y of the rear outer elastic region 73A and the rear intermediate elastic region 73B is preferably set smaller than the separation dimension R1 in the longitudinal direction Y of the front outer elastic region 71A and the front intermediate elastic region 71B.
- the extension stress changes that is, the bending rigidity in the longitudinal direction Y changes.
- the chassis 14 is easily bent.
- the separation dimension R3 in the rear waist region 12 smaller than the separation dimension R1 in the front waist region 11
- bending of the chassis 14 that occurs in the rear waist region 12 is suppressed. be able to.
- the front end edge 15a of the liquid absorbing structure 15 is preferably located between the innermost front waist elastic body 72a of the front outer elastic region 71A and the outermost front waist elastic body 72b of the front intermediate elastic region 71B. More preferably, it is located closer to the front waist elastic body 72b.
- the rear end edge 15b of the liquid absorbing structure 15 is located opposite to the front end edge 15a in the front-rear direction Z, or is located closer to the waist opening 23 than the front end edge 15a.
- the rear waist 15b is generated when the diaper 10 is pulled up by increasing the bending rigidity of the rear intermediate elastic region 73B due to the presence of the end flap 56b of the liquid absorbing structure 15 because the rear edge 15b extends to the vicinity of the waist opening 23. The bending of the region 12 can be further suppressed.
- the dimensions in the longitudinal direction Y of the respective elastic regions in the front and rear waist regions 11 and 12 can be classified so as to have a predetermined ratio as long as the effects of the present invention are achieved.
- the dimensions in the longitudinal direction Y of the front and rear intermediate elastic areas 71B and 73B and the front and rear inner elastic areas 71C and 73C are 1.0 to 2.5 times larger than the dimensions in the longitudinal direction Y of the front and rear outer elastic areas 71A and 73A. It can also be set so that the dimensions of each elastic region in the longitudinal direction Y can be equally divided.
- the longitudinal direction Y dimensions of the front and rear outer elastic regions 71A and 73A are preferably set equal, and the longitudinal direction Y dimensions of the front and rear intermediate elastic regions 71B and 73B are preferably set equal.
- the tensile stress of each elastic region of the front and rear waist elastic regions 71 and 73 is set to 100 mm / min using an tensile tester (INSTRON model: 5564) manufactured by Instron Japan Co., Ltd. Measured with For a portion of each elastic region that does not overlap with the liquid absorbing structure, a specimen having a length of 30 to 50 mm in the lateral direction X is cut out from the portion, and the specimen in a natural state is separated from the specimen in the lateral direction X. A pair of marked lines with a dimension of 20 mm is entered, and the extension force of each specimen when it is extended until the separation dimension becomes 1.7 times is obtained and compared. In addition, when the dimension of the longitudinal direction Y of the diaper 10 which is the width dimension in each test piece is not constant, each extension stress when converted to a value in the case of a width of 30 mm for each test piece Compare the specimens.
- FIG. 10 is a modification of the diaper 10 of the first embodiment, and the diaper 10 extends in the longitudinal direction Y and the lateral direction X until the maximum elongation of each elastic body (to the extent that gathers due to the contracting action of the elastic body disappear). It is the top view which looked at the back waist area 12 from the back surface side (non-skin opposing surface side).
- a rigidity imparting member 65 that functions as a fastening tape used when the diaper 10 is discarded is disposed in the central portion 66 of the rear intermediate elastic region 73B.
- the rigidity imparting member 65 is disposed on the non-skin facing surface side of the rear waist sheet 27, is formed of a plastic sheet extending in the longitudinal direction Y, and is laminated on each other via a folding line.
- the section 61, the second section 62, and the third section 63 are configured, and the cross section in the stacked state is formed in a Z shape.
- the first part 61 is fixed to the rear waist sheet 27 via an adhesive
- the second part 62 is detachably joined to the first part 61
- the third part 63 is detachably joined to the second part 62. ing.
- the rigidity imparting member 65 is attached to the rear intermediate elastic region 73B, whereby the bending rigidity of the rear intermediate elastic region 73B is increased, and the rear intermediate elastic region 73B generated when the diaper 10 is worn.
- the so-called “crush” state can be further suppressed.
- the stiffness imparting member 65 is not limited to a plastic sheet, and a single or multiple layers of fiber nonwoven fabric or the like can also be used.
- the rigidity imparting member 65 can be disposed on the side portion 67 located outside the central portion 66 in the lateral direction X in addition to the central portion 66 in the lateral direction X of the rear intermediate elastic region 73B.
- the rigidity imparting member 65 is disposed in a region overlapping the vertical axis P in the central portion 66, and extends from the rear inner elastic region 73C to the rear outer elastic region 73A.
- the rigidity imparting member 65 may be disposed at the central portion 66 and both side portions 67 and 67 in the lateral direction X, and the bending of the rear waist region 12 can be further suppressed by disposing a plurality of the rigidity imparting members 65. .
- the rigidity imparting member 65 is arranged to extend from the rear inner elastic region 73C to the rear outer elastic region 73A, the boundary portion between the rear outer elastic region 73A and the rear intermediate elastic region 73B, and the rear intermediate elastic region 73B and the rear The chassis 14 can be prevented from being bent at the boundary portion of the inner elastic region 73C.
- Second Embodiment 12 is a plan view similar to FIG. 2 of the diaper 10 according to the second embodiment
- FIG. 13 is an exploded perspective view similar to FIG. 3 of the diaper 10 according to the second embodiment. Since the basic configuration of the diaper 10 according to the present embodiment is the same as that according to the first embodiment, only differences will be described below.
- a waist elastic sheet 90 made of a sheet member that can be elastically expanded and contracted in the lateral direction X is disposed in the front and rear waist regions 11 and 12. Yes.
- the waist elastic sheet 90 includes a front waist elastic sheet 91 located in the front waist region 11 and a rear waist elastic sheet 92 located in the rear waist region 12, and the front waist elastic sheet 91 is a longitudinal direction of the liquid-absorbent core.
- the outer side of Y is disposed between the base sheet 25 and the front waist sheet 26, and the rear waist elastic sheet 92 is made of the same sheet material as the front waist elastic sheet 91, and the longitudinal direction Y of the liquid absorbent core And is disposed between the base sheet 25 and the rear waist sheet 27.
- the front and rear waist elastic sheets 91 and 92 are joined to each other at the side seam 22 to form an annular waist elastic region.
- the second region 84 located between the edge portion 82 of the waist opening 23 and the rear end edge 58 b of the liquid-absorbent core and extending over the entire region between both side portions of the rear waist region 12 is further An auxiliary sheet 93 is arranged.
- the auxiliary sheet 93 is arranged over the entire area between both side portions of the rear waist region 12, and in the region located outside the longitudinal direction Y of the liquid-absorbent core in the front and rear waist regions 11, 12,
- the bending rigidity in the direction Y is set to be higher than that in other regions.
- the diaper 10 In the front waist region 11 of the diaper 10, the diaper 10 is located between the edge 81 of the waist opening 23 and the front end edge 58 a of the liquid-absorbent core, and is opposed to the second region 84 in the front-rear direction Z in the wearing state of the diaper 10.
- the bending rigidity in the longitudinal direction Y is set to be relatively lower than that in the second region 84.
- the auxiliary sheet 93 can be formed of a fiber nonwoven fabric or the like, and is preferably a sheet member that can be elastically expanded and contracted in the lateral direction X.
- the liquid-absorbent core has a front end edge 58a and a rear end edge 58b that are spaced apart from each other in the vertical direction Y and extend in the X lateral direction.
- the liquid-absorbent core has a front end edge 58a and a rear end edge 58b that are spaced apart from each other in the vertical direction Y and extend in the X lateral direction.
- the waist opening 23 Is located between the edge of the waist opening 23 and the front end edge 58a of the liquid-absorbent core, and has a first region 83 across the entire area between both side edges of the front waist region 11, and the rear waist region 12 Is the edge of the waist opening 23
- the second end region 84 that is located between the side edge portions of the rear waist region 12 and is located between the first end region 83 and the second end region 84.
- the bending stiffness in the longitudinal direction Y of the second region 84 is higher than the bending stiffness in the longitudinal direction Y of the first region 83.
- a front outer elastic region 71A in which a front waist elastic body 72 is disposed is located at the edge of the waist opening 23 of the front waist region 11, and a rear of the waist opening 23 of the rear waist region 12 is The rear outer elastic region 73A where the waist elastic body 74 is disposed is located, and the innermost rear waist elastic body 74a of the rear outer elastic region 73A and the outermost rear waist elastic body 74b of the rear intermediate elastic region 73B in the longitudinal direction Y.
- the separation dimension is smaller than the separation dimension in the longitudinal direction Y between the innermost front waist elastic body 72a of the front outer elastic region 71A and the outermost front waist elastic body 72b of the front intermediate elastic region 71B.
- the extension stress in the predetermined width of the rear intermediate elastic region 73B is higher than the extension stress in the predetermined width of the rear outer elastic region 73A.
- a sheet-like or tape-like rigidity imparting member 65 is disposed in a part of the rear intermediate elastic region 73B.
- the rigidity imparting member 65 is located in the central portion 66 in the lateral direction X of the rear intermediate elastic region 73B.
- the rigidity imparting member 65 is a fastening tape extending in the longitudinal direction Y.
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Abstract
Description
下記の実施の形態は、本発明の一例である図1~4に示すパンツ型の着用物品に関し、発明の不可欠な構成ばかりではなく、選択的及び好ましい構成を含む。図2において、後述する各弾性体は、その収縮力に抗して、横方向X及び縦方向Yへの収縮力により各弾性体が取り付けられた部材に生じたギャザーが、自然な視覚によって実質的に無くなっているように見える程度にまで伸長された状態にある。
ベースシート25は、縦方向Yにおいて離間対向する第1及び第2端縁25a,25bと、横方向Xにおいて離間対向する両側縁25c,25dとを有する。両側縁25c,25dは、前後ウエスト域11,12における直状部位と、クロッチ域13において、縦軸Pに向かって後ウエスト域12側から前ウエスト域11側により深く凸曲する曲状部位とから形成される。
前ウエストシート26は、前ウエスト域11とクロッチ域13の一部とを形成する略台形状であって、横方向Xへ延びる中間内端縁26a及び外端縁26bと、縦方向Yへ延びる両外側縁26c,26dと、両外側縁26c,26dと中間内端縁26aとを結ぶ両側内端縁26e,26fとから形成される。両側内端縁26e,26fは、外側縁26c,26dから横方向Xへ直状に延びる直状部位と、該直状部位から中間内端縁26aに延びる曲状部位とを有する。前ウエストシート26は、ウエスト開口縁に沿って内側へ折り曲げられた折曲部33を有する。折曲部33は、ベースシート25の内面に吸液構造体15が配置された状態で、ベースシート25の第1端縁25aに沿って内側へ折り曲げられ、ベースシート25及び吸液構造体15の肌対向面に固定される。
後ウエストシート27は、後ウエスト域12とクロッチ域13の一部とを形成する略台形状であって、横方向Xへ延びる中間内端縁27a及び外端縁27bと、外端縁27bから縦方向Yへ延びる両外側縁27c,27dと、両外側縁27c,27dと中間内端縁27aとを曲状に結ぶ両側内端縁27e,27fとから形成される。後ウエストシート27は、ウエスト開口縁に沿って内側へ折り曲げられた折曲部38を有する。折曲部38は、ベースシート25の内面に吸液構造体15が配置された状態で、ベースシート25の第2端縁25bに沿って内側へ折り曲げられ、ベースシート25及び吸液構造体15の肌対向面に固定される。
図2及び図3を参照すると、吸液構造体15は、縦方向Yに離間対向して横方向Xに延びる前端縁15a及び後端縁15bと、横方向Xにおいて離間対向して縦方向Yに延びる両側縁15cとを有し、前端部16Aと、後端部16Bと、前後端部16A,16B間に位置する中央部16Cとを有する。吸液構造体15は、肌対向面側に位置し、透液性を有する繊維不織布製の身体側ライナ50と、曲状の両側縁を有する吸液性の吸収体51と、一対のバリアカフシート52と、防漏シート53とを含む。吸収体51は、例えば、フラッフパルプと、吸収性ポリマー粒子等との混合物から形成された吸液性コアと、吸液性コア全体を被包するティッシュペーパ等の液吸収拡散性のコアラップシートとを含む。吸液性コアは、前ウエスト域11において横方向Xに延びる前端縁58aと、前端縁58aと縦方向Yにおいて離間対向し、後ウエスト域において横方向Xに延びる後端縁58bとを有する。身体側ライナ50とバリアカフシート52及び防漏シート53とは、吸液性コアの前端縁58a及び後端縁58bから、それぞれ縦方向Yに延出するエンドフラップ56a,56bを形成する。吸液構造体15とベースシート25とは、それらの対向面の少なくとも一方に塗布されたホットメルト接着剤等の公知の接合手段から形成された接合域60を介して互いに接合される。本実施形態においては、接合域60は、縦方向Yにおいて離間した複数の接合部位から構成されているが、吸液構造体15の裏面全体を接合するように連続した接合域であってもよい。
図4は、図1のIV-IV線断面図であり、図5及び図6は、それぞれ図2に示す前後ウエスト域11,12において、吸液構造体15を取り除いた状態を示す平面図である。前ウエスト弾性域71は、ウエスト開口23の縁部において横方向Xへ延びる前外側弾性域71Aと、クロッチ域13側において横方向Xへ延びる前内側弾性域71Cと、吸液性コアの縦方向Y外側であって、前外側弾性域71Aと前内側弾性域71Cとの間に位置する前中間弾性域(第1領域)71Bとを有する。後ウエスト弾性域73は、ウエスト開口23の縁部において横方向Xへ延びる後外側弾性域73Aと、吸液性コアの縦方向Y外側に位置してクロッチ域13側において横方向Xへ延びる後内側弾性域73Cと、後外側弾性域73Aと後内側弾性域73Cとの間に位置する後中間弾性域(第2領域)73Bとを有する。図4において、前後方向Zに平行な仮想線S1,S2が示すように、前外側弾性域71Aと後外側弾性域73A、及び前中間弾性域71Bと後中間弾性域73Bは、それぞれ、着用状態における前後方向Zにおいて互いに対向して位置している。ただし、後記の本願発明の効果を奏する限りにおいて、少なくとも前中間弾性域71Bと後中間弾性域73Bとが前後方向Zにおいて互いに対向して位置していればよい。
用語「たくれる」は、物品の着用中にその一部が移動して比較的大きな皺/襞が生じることを意味する(図7参照)。
前ウエスト弾性体72は、ストリング状またはストランド状の弾性材料から形成することができる。前外側弾性域71Aに位置する前ウエスト弾性体72は、繊度が300~1000dtex、約1.8~3.5倍に伸長された状態で配設された複数条の弾性材料からなり、縦方向Yに約3~15mm互いに離間して配置されることが好ましく、本実施形態では、繊度が約620dtex、伸長倍率が約2.3倍の5本の弾性材料からなり、縦方向Yに約6mm間隔で離間して配置される。前中間弾性域71Bに位置する前ウエスト弾性体72は、吸液構造体15のエンドフラップ56aと平面視において重なるように位置し、繊度が300~1000dtex、約1.8~3.5倍に伸長された状態で配設された複数条の弾性材料からなり、縦方向Yに約3~15mm互いに離間して配置されることが好ましく、本実施形態では、繊度が約470dtex、伸長倍率が約2.3倍である4本の弾性材料からなり、縦方向Yに約10mm離間して配置されている。前内側弾性域71Cに位置する前ウエスト弾性体72は、繊度が300~1000dtex、約1.8~3.5倍に伸長された状態で配設された複数条の弾性材料からなり、縦方向Yに約5~20mm互いに離間して配置されることが好ましく、本実施形態では、繊度約780dtexの10本の弾性材料からなり、伸長倍率が約2.5倍であって、縦方向Yに約10mm互いに離間して配置される。
曲げ剛性は、IMADA製トルク試験機(型番EX-0762)(ロードセル:引張・圧縮50N、トルク1N)を用いて測定した。おむつ10の前後ウエスト域11,12のそれぞれにおいて、ウエスト開口23から縦方向Yに35mm離間した位置からクロッチ域13側へ向かって縦方向Yの寸法が45mm、縦軸Pを中心として横方向Xの寸法が30mmの試験片を準備した。図9は、後ウエスト域12における試験片40の採取部位を示す説明図である。試験片40の長手方向(縦方向Y)の両端部41,42を10mmずつ試験機の一対のチャックで把持し、一方のチャックを他方のチャックを中心に回転させ、これによって折り曲げられた試験片40の曲げ剛性をトルク試験機で測定する。回転速度は30rpm、回転角度は50度とし、測定角度は40度とした。試験片は、前後ウエスト域11,12について各5組準備して(実施例1~5)、これらの測定値(トルク強度)(単位:mN・m)の平均値を縦方向Yにおける平均曲げ剛性値とした。測定の対象となる前後ウエスト域11,12には、伸長状態で取り付けられた前後ウエスト弾性体72,74が存在するから、試験片をおむつ10から切り取る際には、前後ウエスト弾性体72,74の収縮力に抗して前後ウエスト域11,12を縦方向Y及び横方向Xに引っ張った状態で寸法を測った。表1に示すとおり、後中間弾性域73Bの曲げ剛性値B1は、いずれも前中間弾性域71Bの曲げ剛性値B2よりも高くなった。なお、前後中間弾性域71B,73Bの縦方向Yにおける曲げ剛性は、上記基準により準備した試験片をJIS L1096 19.1A法(45°カンチレバー法)に基づいて測定して比較することもできる。
前後ウエスト弾性域71,73の各弾性域の伸長応力は、インストロン
ジャパン カンパニーリミテッド社製の引張試験機(INSTRON 型式:5564)を用い、引張速度を100mm/minに設定して、以下の方法で測定した。各弾性域のうちで吸液構造体と重なることのない部分について、その部分から横方向Xの長さが30~50mmの試片を切り取って、自然状態にある試片に横方向Xの離間寸法が20mmの一対の標線を記入し、その離間寸法が1.7倍になるまで伸長した時の各試片の伸長力を求めて、比較する。なお、各試片においてその幅寸法であるおむつ10の縦方向Yの寸法が一定でない場合には、各試片についての伸長力を幅30mmである場合の値に換算したときの伸長応力によって各試片を比較する。
図10は、第1実施形態のおむつ10の変形例であって、各弾性体の最大伸長時(弾性体の収縮作用によるギャザーがなくなる程度)まで縦方向Y及び横方向Xに伸展したおむつ10の後ウエスト域12を裏面側(非肌対向面側)から視た平面図である。
図12は、第2実施形態に係るおむつ10の図2と同様の平面図であり、図13は第2実施形態に係るおむつ10の図3と同様の分解斜視図である。本実施形態に係るおむつ10は、第1実施形態にかかるそれと基本的構成が同一であるので、相違する点についてのみ以下に説明する。
(1)前ウエスト域11のウエスト開口23の縁部には、前ウエスト弾性体72が配置された前外側弾性域71Aが位置し、後ウエスト域12のウエスト開口23の縁部には、後ウエスト弾性体74が配置された後外側弾性域73Aが位置し、後外側弾性域73Aの最内側後ウエスト弾性体74aと後中間弾性域73Bの最外側後ウエスト弾性体74bとの縦方向Yにおける離間寸法は、前外側弾性域71Aの最内側前ウエスト弾性体72aと前中間弾性域71Bの最外側前ウエスト弾性体72bとの縦方向Yにおける離間寸法よりも小さい。
(2)後中間弾性域73Bの所定幅における伸長応力は、後外側弾性域73Aの所定幅における伸長応力よりも高い。
(3)後中間弾性域73Bの一部には、シート状またはテープ状の剛性付与部材65が配置される。
(4)剛性付与部材65は、後中間弾性域73Bの横方向Xの中央部66に位置する。
(5)剛性付与部材65は、縦方向Yに延びる止着テープである。
11 前ウエスト域
12 後ウエスト域
13 クロッチ域
14 シャーシ
15 吸液構造体
58a 吸液性コアの前端縁
58b 吸液性コアの後端縁
65 剛性付与部材
71 前ウエスト弾性域
71A 前外側弾性域
71B 前中間弾性域(第1領域)
72 前ウエスト弾性体
73 後ウエスト弾性域
73A 後外側弾性域
73B 後中間弾性域(第2領域)
74 後ウエスト弾性体
X 横方向
Y 縦方向
Z 前後方向
Claims (7)
- 縦方向及び横方向と、肌対向面及びその反対側に位置する非肌対向面と、前ウエスト域と、後ウエスト域と、前記前後ウエスト域間に位置するクロッチ域とを有し、前記クロッチ域から前記前後ウエスト域へ延びる吸液性コアを含むシャーシと、前記前後ウエスト域の両側縁部を連結して画成されるウエスト開口及び一対のレッグ開口とを含むパンツ型の着用物品において、
前記吸液性コアは、前記縦方向において離間対向して前記横方向へ延びる前端縁と後端縁とを有し、
前記前ウエスト域は、前記前ウエスト域の両側縁部間に伸長状態で前記横方向へ収縮可能に取り付けられた複数条の前ウエスト弾性体と、前記前ウエスト弾性体が配置され、かつ、前記ウエスト開口の縁部と前記吸液性コアの前記前端縁との間に位置する第1領域とを有し、
前記後ウエスト域は、前記後ウエスト域の両側縁部間に伸長状態で前記横方向へ収縮可能に取り付けられた複数条の後ウエスト弾性体と、前記後ウエスト弾性体が配置され、かつ、前記ウエスト開口の縁部と前記吸液性コアの前記後端縁との間に位置する第2領域とを有し、
前記第1領域と前記第2領域とは、着用状態の前後方向において互いに対向して位置しており、
前記第2領域における前記後ウエスト弾性体の数は、前記第1領域における前記前ウエスト弾性体の数よりも多く、
前記第2領域において互いに隣接する前記後ウエスト弾性体の前記縦方向の離間寸法は、前記第1領域において互いに隣接する前記前ウエスト弾性体の前記縦方向の離間寸法よりも小さいことを特徴とする前記着用物品。 - 縦方向及び横方向と、肌対向面及びその反対側に位置する非肌対向面と、前ウエスト域と、後ウエスト域と、前記前後ウエスト域間に位置するクロッチ域とを有し、前記クロッチ域から前記前後ウエスト域へ延びる吸液性コアを含むシャーシと、前記前後ウエスト域の両側縁部を連結して画成されるウエスト開口及び一対のレッグ開口とを含むパンツ型の着用物品において、
前記吸液性コアは、前記縦方向において離間対向して前記横方向へ延びる前端縁と後端縁とを有し、
前記前ウエスト域は、前記ウエスト開口の縁部と前記吸液性コアの前記前端縁との間に位置して、前記前ウエスト域の両側縁部間の全域に亘る第1領域を有し、
前記後ウエスト域は、前記ウエスト開口の縁部と前記吸液性コアの前記後端縁との間に位置して、前記後ウエスト域の両側縁部間の全域に亘る第2領域を有し、
前記第1領域と前記第2領域とは、着用状態の前後方向において互いに対向して位置しており、
前記第2領域の前記縦方向における曲げ剛性は、前記第1領域の前記縦方向における曲げ剛性よりも高いこと特徴とする前記着用物品。 - 前記前ウエスト域の前記ウエスト開口の縁部には、前記前ウエスト弾性体が配置された前外側弾性域が位置し、前記後ウエスト域の前記ウエスト開口の縁部には、前記後ウエスト弾性体が配置された後外側弾性域が位置し、前記後外側弾性域の最内側後ウエスト弾性体と前記第2領域の最外側後ウエスト弾性体との前記縦方向における離間寸法は、前記前外側弾性域の最内側前ウエスト弾性体と前記第1領域の最外側前ウエスト弾性体との前記縦方向における離間寸法よりも小さい請求項1に記載の着用物品。
- 前記第2領域の所定幅における伸長応力は、前記後外側弾性域の所定幅における伸長応力よりも高い請求項3記載の着用物品。
- 前記第2領域の一部には、シート状またはテープ状の剛性付与部材が配置される請求項1~4のいずれかに記載の着用物品。
- 前記剛性付与部材は、前記第2領域の前記横方向の中央部に位置する請求項5記載の着用物品。
- 前記剛性付与部材は、前記縦方向に延びる止着テープである請求項5または6に記載の着用物品。
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