WO2017110395A1 - 使い捨ておむつ - Google Patents
使い捨ておむつ Download PDFInfo
- Publication number
- WO2017110395A1 WO2017110395A1 PCT/JP2016/085628 JP2016085628W WO2017110395A1 WO 2017110395 A1 WO2017110395 A1 WO 2017110395A1 JP 2016085628 W JP2016085628 W JP 2016085628W WO 2017110395 A1 WO2017110395 A1 WO 2017110395A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- skin
- side sheet
- disposable diaper
- sheet
- less
- Prior art date
Links
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Images
Classifications
-
- 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
- A61F13/51—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 outer layers
- A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
- A61F13/51474—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure
- A61F13/51478—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being a laminate, e.g. multi-layered or with several layers
- A61F13/5148—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its structure being a laminate, e.g. multi-layered or with several layers having an impervious inner layer and a cloth-like outer layer
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- 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
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- 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
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- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
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- 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
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- A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
- A61F13/49466—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being 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
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- A—HUMAN NECESSITIES
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- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
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- 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
- A61F13/51—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 outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
- A61F13/5121—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations characterised by the vertical shape of the apertures, e.g. three dimensional apertures, e.g. macro-apertures
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- A—HUMAN NECESSITIES
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- 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
- A61F13/51—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 outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
- A61F13/51305—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability having areas of different permeability
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- A—HUMAN NECESSITIES
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- 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
- A61F13/51—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 outer layers
- A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
- A61F13/51456—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties
- A61F13/51458—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being air-pervious or breathable
- A61F13/5146—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by its properties being air-pervious or breathable having apertures of perforations
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- A—HUMAN NECESSITIES
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- 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
- A61F13/56—Supporting or fastening means
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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
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/44—Devices worn by the patient for reception of urine, faeces, catamenial or other discharge; Portable urination aids; Colostomy devices
Definitions
- the present invention relates to a disposable diaper.
- Patent Document 1 a disposable diaper in which a sheet or the like that absorbs sweat is provided on the surface of the disposable diaper that touches the skin to effectively prevent the occurrence of eczema, rash, rash, etc.
- Patent Document 1 in order to absorb sweat, a hydrophobic first fiber nonwoven fabric is superposed on the skin contact side and a hydrophilic second fiber nonwoven fabric is superposed on the skin non-contact side at a heat fusion part.
- a disposable diaper in which a fixed composite sheet is provided on an end flap and a side flap is disclosed.
- Patent Document 1 describes that a large number of apertures that penetrate the first fiber nonwoven fabric of the composite sheet are provided.
- the exterior body constituting the pants-type disposable diaper is formed by juxtaposing the cylindrical portions extending in the vertical direction in the width direction.
- a pants-type disposable diaper in which a plurality of apertures connected to the inside of the cylindrical portion are intermittently formed in the longitudinal direction on the convex portion of the sheet disposed on the skin contact surface side constituting the skirt for example, Patent Document 2.
- the present invention includes a ventral region and a dorsal region in the vertical direction, and a crotch region positioned therebetween, and has an absorber over the ventral region and the dorsal region, and the absorber
- It is a disposable diaper which has an abdominal side waist flap and a back side waist flap which are located outward from each front-and-rear end part of the vertical direction, and are extended in a horizontal direction.
- At least the back-side waist flap includes a hydrophobic skin-side sheet that forms a skin contact surface and a hydrophilic non-skin-side sheet positioned on the non-skin-facing surface side of the skin-side sheet.
- seat is provided with the several hollow part hollowed toward the said non-skin side sheet
- the thickness of the hollow portion of the skin-side sheet decreases as the thickness approaches the opening.
- FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment of the present invention in a natural state.
- FIG. 2 is a developed plan view of the state in which the diaper shown in FIG. 1 is developed and stretched as viewed from the skin contact surface side.
- Fig.3 (a) is the principal part enlarged plan view which looked at a part of exterior body of the diaper shown in FIG. 2 from the skin contact surface side
- FIG.3 (b) is a part of the hollow part shown to (a).
- It is an enlarged plan view. 4 is a cross-sectional view taken along line IV-IV shown in FIG.
- FIG. 5 is an exploded perspective view of a part of the outer package of the diaper shown in FIG.
- FIG. 6 is an enlarged cross-sectional view showing a cross section along the horizontal direction (Y direction) of the waist stretchable part in the diaper shown in FIG. 1.
- the disposable diaper described in Patent Document 1 is formed in a state in which the fiber form of the constituent fibers is maintained in order to transfer sweat from the heat-sealed part by capillary action.
- the thickness of the peripheral part thereof cannot be sufficiently reduced, the capillary phenomenon is unstable, and the opening part is not formed. Can't pass and absorb enough sweat.
- Patent Document 2 does not describe anything about the thickness of the peripheral portion of the opening formed in the exterior body.
- the disposable diaper of the present invention includes a ventral region A and a dorsal region B in the longitudinal direction X, and a crotch region C positioned between the A and B, and spans the ventral region A and the dorsal region B. And has an abdominal side waist flap FA and a back side waist flap FB which are located outward from the front and rear end portions 23A and 23B in the longitudinal direction X of the absorbent body 23 and extend in the lateral direction Y. Yes.
- the abdominal region A is a region disposed on the wearer's abdomen when wearing the disposable diaper
- the back region B is a region disposed on the wearer's back when wearing the disposable diaper.
- the ventral waist flap FA is a region extending outward in the vertical direction X from the edge of the front end 23A on the ventral region A side in the vertical direction X of the absorber 23, and the absorber. 23 is a region obtained by combining the region extending in the horizontal direction Y from the front end 23A on the ventral region A side in the vertical direction X.
- the back side waist flap FB is a region extending outward in the vertical direction X from the edge of the rear end portion 23B on the back side region B side in the vertical direction X of the absorber 23 and absorbing in the horizontal direction Y. It means a region that is combined with a region extending in the lateral direction Y from the rear end 23B of the body 23 in the longitudinal direction X on the back region B side.
- the diaper 1 includes an absorbent main body 2 and an exterior body 3 that is arranged on the non-skin-facing surface side of the absorbent main body 2 and fixes the absorbent main body 2.
- 3 includes an abdominal side waist flap FA and a back side waist flap FB which are located outward from the longitudinal front and rear end portions 23A and 23B of the absorbent body 23 constituting the absorbent main body 2 and extend in the lateral direction Y. ing.
- the diaper 1 includes a pair of side seal portions S, S in which left and right side edges 3a1, 3a1 of the ventral region A of the exterior body 3 and left and right side edges 3b1, 3b1 of the back region B of the exterior body 3 are joined.
- a disposable diaper in which a waist opening WO and a pair of leg openings LO, LO are formed.
- the outer body 3 of the diaper 1 is, as shown in FIG. 2, a plan view of the expanded and extended state, and a ventral region A disposed on the wearer's ventral side when worn, worn when worn. It is divided into a dorsal region B disposed on the back side of the person and a crotch region C between the ventral region A and the dorsal region B.
- the state where the diaper 1 is expanded and extended as described above refers to peeling the side seal portion S so that the diaper 1 is in an expanded state, and the expanded diaper 1 is replaced with an elastic member of each part. Is extended to the design dimension (same as the dimension when flattened in a state where the influence of the elastic member is completely eliminated).
- the “skin contact surface” means a surface of the diaper 1 or a constituent member thereof (for example, the exterior body 3) that contacts the wearer's skin when worn.
- the “skin facing surface” is a surface of the diaper 1 or a constituent member thereof that is directed toward the wearer's skin when worn, and the “non-skin facing surface” is the wear of the diaper 1 or a constituent member thereof. It is a surface that is sometimes directed to the side opposite the wearer's skin side (clothing side).
- the vertical direction (X direction) is a direction extending from the ventral region A to the dorsal region B in a state where the diaper 1 is expanded and extended on a plane.
- the horizontal direction (Y direction) is a direction orthogonal to the vertical direction (X direction), and is the width direction of the diaper 1 in a state where the diaper 1 is expanded and extended on a plane.
- the diaper 1 is a left-right symmetric form with respect to the vertical centerline CL1 extended in a vertical direction (X direction) shown in FIG.
- CL2 in FIG. 2 is a horizontal center line extending in the horizontal direction (Y direction) that bisects the diaper 1, and is orthogonal to the vertical center line CL1.
- the absorbent main body 2 has a vertically long shape in which the longitudinal direction (X direction) is relatively long in a state where the diaper 1 is expanded and stretched.
- the absorptive main body 2 includes a liquid-permeable surface sheet 21 that forms a skin-facing surface, a liquid-permeable surface sheet (including water repellency) that forms a non-skin-facing surface, and both of these sheets 21 and 22. And a liquid-retaining absorbent 23 interposed therebetween.
- the both sides along the longitudinal direction (X direction) of the absorptive main body 2 have elastic members 25 for forming a leak-proof cuff arranged in an elongated state in the longitudinal direction (X direction).
- Leak-proof cuffs 24, 24 are provided.
- the leak-proof cuff 24 is made of a liquid-impermeable or water-repellent and breathable material, and in the vicinity of the free end of each leak-proof cuff 24, a leak-proof cuff forming elastic member. 25 is arranged in a state of extending in the vertical direction (X direction).
- X direction the vertical direction
- the free end portion side of the leak-proof cuff 24 rises due to the contraction of the leak-proof cuff forming elastic member 25, and the outflow of body fluid in the lateral direction (Y direction) is prevented.
- the absorbent main body 2 configured as described above has its longitudinal direction (X direction) aligned with the longitudinal direction (X direction) of the diaper 1 in the unfolded and extended state. It is joined to the center part of 3 by the main body fixing adhesive. As described above, the outer package 3 is arranged and bonded and fixed to the non-skin facing surface side of the back sheet 22 constituting the absorbent main body 2 in the thickness direction of the disposable diaper 1. Therefore, in the diaper 1, the absorbent body 23 constituting the absorbent main body 2 is disposed across the ventral region A and the back region B.
- the diaper 1 has a skin side sheet 4 and a non-skin side sheet 5 on the ventral side waist flap FA and the back side waist flap FB, respectively.
- a hydrophobic outer layer sheet 6 is provided on the opposite surface side.
- the exterior body 3 is positioned outward from the front and rear end portions 23A and 23B in the longitudinal direction X of the absorbent body 23 and extends in the lateral direction Y. It has FA and dorsal waist flap FB.
- the exterior body 3 includes an outer layer sheet 6 on the non-skin facing surface side that forms the outer surface of the diaper 1, a skin side sheet 4 on the most skin facing surface side, the outer layer sheet 6 and the skin.
- An inner layer sheet disposed between the side sheets 4 is provided.
- the inner layer sheet corresponds to the non-skin side sheet 5.
- the sheet material constituting the outer layer sheet 6 in each of the ventral region A and the dorsal region B is a non-skin side sheet along the peripheral edge of the waist opening WO. 5, the folded portion 6R covers the front and rear end portions 23A and 23B in the longitudinal direction (X direction) of the absorbent body 23 constituting the absorbent main body 2.
- the skin side sheet 4, the non-skin side sheet (inner layer sheet) 5, and the outer layer sheet 6 may be separate sheets, but in the diaper 1, the skin side sheet 4 is the folded portion 6 ⁇ / b> R of the outer layer sheet 6. It is formed with.
- seat 4 is distribute
- the outer layer sheet 6 and the non-skin side sheet 5 excluding the folded portion 6R are bound inward toward the longitudinal center line CL1 in the longitudinal direction (X direction) central portion, as shown in FIG. They are formed in the same shape and size.
- the skin side sheet 4 formed by the folded portion 6R of the outer layer sheet 6 is formed in a rectangular shape that is long in the lateral direction (Y direction).
- the skin-side sheet 4 includes a plurality of recesses 41 that are recessed toward the non-skin-side sheet 5, and an opening 44 that penetrates the skin-side sheet 4 in each recess 41.
- the skin side sheet 4 includes a fusion part 42 in which the constituent fibers of the skin side sheet 4 are fused in each depression 41.
- fusion part 42 contains the part which the constituent fiber of the skin side sheet
- the fused part means that the constituent fibers are melted without gaps, and even if it is peeled off from the fused part, it is melted until it no longer returns to the original fiber shape.
- fusion part is the liquid impermeability which does not permeate
- the fused part 42 of the diaper 1 the fused part is formed into a film.
- the opening 44 is formed in the fusion
- the opening 44 (the fused portion 42 in which the opening 44 is disposed) is at least in the longitudinal direction of the absorbent body 23 constituting the absorbent main body 2 (at the skin side sheet 4) from the viewpoint of improving sweat absorption.
- X direction is preferably arranged on the outer side in the vertical direction X (the side opposite to the horizontal center line CL2 side) than the edge of the rear end portion 23B.
- the side sheets 4 are disposed intermittently throughout.
- the fusion part 42 in which the opening 44 is arranged is arranged intermittently so as to form a line along the longitudinal direction (X direction), and includes the plurality of fusion parts 42.
- a plurality of the fusion part rows 42L are arranged at intervals in the horizontal direction (Y direction).
- the fusion portion 42 in which the opening 44 is disposed is disposed at a position that does not overlap with the joint portion 8 to be described later, from the viewpoint of improving sweat diffusibility.
- the fusion part rows 42 ⁇ / b> L and the joint part rows 8 ⁇ / b> L formed of a plurality of joint parts 8 to be described later are alternately arranged in the lateral direction (Y direction).
- the fusion part 42 in which the apertures 44 are arranged can be formed by subjecting only the skin side sheet 4 to heat embossing and melting until the skin side sheet 4 is opened.
- a heat embossing apparatus an embossing roll and an anvil roll are provided, and what has a convex part of the shape corresponding to the melt
- an ultrasonic seal, a laser, or the like can be employed instead of the heat embossing process.
- the embossing strength when the fused portion 42 is formed is set to the junction 8 described later. It is preferable to form it with stronger embossing strength.
- the diaper 1 in a plan view, a state where the diaper 1 is unfolded and extended is adjacent to the longitudinal direction (X direction) constituting the fusion portion row 42 ⁇ / b> L extending in the longitudinal direction (X direction).
- the distance between the portions 42 and 42 is preferably 1 mm or more, more preferably 3 mm or more, from the viewpoint of improving sweat absorption and preventing sweat from returning from the non-skin side sheet 5 to the skin. , 20 mm or less, more preferably 18 mm or less, specifically more preferably 1 mm or more and 20 mm or less, and even more preferably 3 mm or more and 18 mm or less.
- a plan view of the unfolded and extended state as shown in FIG.
- the interval between the fusion part rows 42L and 42L adjacent in the lateral direction (Y direction) is from the viewpoint of improving sweat diffusibility. It is preferably 4 mm or more, more preferably 6 mm or more, and preferably 20 mm or less, more preferably 16 mm or less, specifically, 4 mm or more and 20 mm or less. More preferably, it is 6 mm or more and 16 mm or less.
- the thickness of the hollow part 41 becomes small, so that the opening 44 is approached.
- the outer peripheral portion 43 of the opening 44 in the hollow portion 41 constituting the skin side sheet 4 is an inner peripheral wall (periphery of the opening 44) of the fused portion 42 constituting the opening 44.
- the thickness gradually decreases toward 42e.
- the outer peripheral portion 43 means a portion including the outer peripheral fused portion 42 from the inner peripheral wall 42 e of the fused portion 42 which is the peripheral edge (contour) of the opening 44.
- the outer peripheral portion 43 is formed in an annular shape with the inner peripheral wall (periphery of the opening 44) 42 e of the fusion portion 42 in each recess portion 41 as a base end.
- the fusion is performed.
- the thickness at a position 0.50 times the depth (d3) outward from the inner peripheral wall 42e of the portion 42 is not less than 20% and not more than 75% of the thickness d2 of the portion excluding the recessed portion 41.
- the thickness at a position 1.5 times the depth (d3) outward from the inner peripheral wall 42e of the fusion part 42 is preferably 30% or more and 65% or less.
- the thickness d2 of the part excluding the part 41 is preferably 55% or more and 95% or less, and more preferably 70% or more and 90% or less. Measurement of the depth (d3) of the hollow portion 41 in the inner peripheral wall 42e of the fused portion 42 and the thickness at the above-mentioned separated position are measured in the same manner as the measurement of the thickness d5 of the inner peripheral wall 42e of the fused portion 42 described later. To do.
- seat 4 is measured using a thickness measuring device in the state which added the load of 0.05 kPa to the skin side sheet
- FIG. A laser displacement meter manufactured by OMRON Corporation is used for the thickness measuring instrument. Thickness measurement is carried out by measuring 10 points, and calculating the average value thereof to obtain the thickness of the portion excluding the recessed portion 41.
- the fact that the outer peripheral portion 43 of the opening 44 gradually decreases in thickness toward the inner peripheral wall 42e of the fused portion 42 indicates that the depth (d3) is outward from the inner peripheral wall 42e of the fused portion 42.
- the thickness at a position 0.50 times away from the inner peripheral wall 42e of the fused portion 42 is smaller than the thickness at a position 1.5 times away from the depth (d3).
- the opening 44 of the skin side sheet 4 has a thickness d5 (see FIG. 4) of the inner peripheral wall 42e of the fused part 42 from the viewpoint of shifting the sweat of the wearer to the non-skin side sheet 5 side. It is preferably 60 ⁇ m or less, more preferably 45 ⁇ m or less, and the lower limit is 10 ⁇ m.
- the thickness d5 of the inner peripheral wall 42e of the fused part 42 is measured in the thickness direction so that the cut surface of the inner peripheral wall 42e of the fused part 42 is not crushed by using a knife, cutter, razor or the like so as to include the opening 44. Then, the cut section is observed with a microscope, and the thickness of the inner peripheral wall 42e of the fused portion 42 is measured. The thickness is measured at 10 different inner peripheral walls 42e, and the average value thereof is calculated as the thickness of the inner peripheral wall 42e of the fused portion 42.
- seat 4 is 0.5 mm or more in diameter L1 (refer FIG. 3) from a viewpoint which transfers a wearer's sweat to the non-skin side sheet
- the diameter L1 (see FIG. 3) of the opening 44 means the length of the opening 44 at the narrowest position.
- the thickness d5 (see FIG. 4) of the inner peripheral wall 42 e of the fused portion 42 of the skin side sheet 4 is determined from the viewpoint of shifting the wearer's sweat to the non-skin side sheet 5 side.
- the diameter L1 (see FIG. 3) is preferably 1/10 or less, more preferably 1/30 or less, and the lower limit is 1/50.
- the opening 44 of the skin side sheet 4 has an opening area of 0.5 mm 2 or more.
- it is 0.75 mm 2 or more, more preferably 5 mm 2 or less from the viewpoint that sweat does not return from the non-skin side sheet 5 to the skin, and it is 4 mm 2 or less. More preferably, specifically, it is preferably 0.5 mm 2 or more and 5 mm 2 or less, and more preferably 0.75 mm 2 or more and 4 mm 2 or less.
- the back side waist flap FB of the diaper 1 is in a state of being expanded and extended as shown in FIG.
- the ratio of the area of the entire opening 44 to the total area of the skin-side sheet 4 is preferably 1% or more, more preferably 3% or more
- the non-skin-side sheet 5 From the viewpoint of preventing sweat from returning to the skin, it is preferably 15% or less, more preferably 10% or less, specifically more preferably 1% or more and 15% or less, and more preferably 3% or more. More preferably, it is 10% or less.
- the opening 44 of the skin-side sheet 4 is a portion in the outer peripheral portion 43 excluding the recessed portion 41 in the skin-side sheet 4.
- the thickness d2 (see FIG. 4) is preferably 70% or less in the thin region 43T, and the thin region 43T has a thickness d2 (see FIG. 4) of 40% or less. More preferably, it is formed in the aperture-side thin region 43ST. In the diaper 1, not only the opening 44 is formed in the thin region 43T but also the fusion part 42 is formed in the thin region 43T. Further, the thickness d2 (see FIG.
- the skin-side sheet 4 excluding the depression 41 is preferably 600 ⁇ m or less from the viewpoint that sweat does not return from the non-skin-side sheet 5 to the skin, and is 350 ⁇ m.
- the lower limit is more preferably 100 ⁇ m.
- the thin region 43 ⁇ / b> T of the outer peripheral portion 43 of the opening 44 in the hollow portion 41 is formed in an annular shape, like the outer peripheral portion 43.
- the thin region 43T of the recess 41 has a diameter L2 (see FIGS. 3A and 3B) that is the diameter L1 of the opening 44 (from the viewpoint of transferring the sweat of the wearer to the non-skin side sheet 5 side). As shown in FIGS. 3 (a) and 3 (b), it is preferably 1.5 times or more, more preferably 2 times or more, and the upper limit is 3 times.
- the diameter L2 (see FIGS. 3A and 3B) of the annular thin region 43T means the length at the narrowest position on the outer periphery of the thin region 43T.
- the skin-side sheet 4 has a basis weight of 30 g / m 2 or less, and preferably 20 g / m 2 or less from the viewpoint of shifting the sweat of the wearer to the non-skin-side sheet 5 side. Since the sheet 4 is a gap between the absorbed non-skin side sheet 5 and the skin, the sweat of the wearer who has moved to the non-skin side sheet 5 is less likely to return to the skin, and the sweat is absorbed. Is more preferably 9 g / m 2 or more, more preferably 10 g / m 2 or more, specifically 9 g / m 2 or more and 30 g / m 2 or less.
- the skin-side sheet 4 is 10 g / m 2 or more and 20 g / m 2 or less.
- the basis weight of the skin-side sheet 4 can be measured from the measurable sheet area and its weight. In this case, the measurement is performed at 23 ⁇ 2 ° C. and a relative humidity of 50 ⁇ 5%, and the sample is stored in the same environment for 24 hours or more before the measurement.
- seat 5 may be fixed by the junction part 8 by the heat embossing mentioned later, for example, as shown in FIG. It is bonded via an adhesive 9.
- the adhesive 9 is coated on the non-skin facing surface of the skin side sheet 4 or the skin facing surface of the non-skin side sheet 5 in, for example, a spiral shape. From the viewpoint of shifting the wearer's sweat to the non-skin-side sheet 5 side, the position where the adhesive 9 is arranged overlaps with the fusion part 42 of the skin-side sheet 4 as shown in FIG. Preferably it is.
- the exterior body 3 is extended in the horizontal direction (Y direction) between the non-skin side sheet
- a waist elastic part G1 and a waistline lower elastic part G2 are formed.
- the leg stretchable part G ⁇ b> 3 is formed by including a plurality of leg elastic members 72.
- the waist stretchable part G ⁇ b> 1 is formed in the longitudinal direction (X direction) of the front and rear end parts 23 ⁇ / b> A and 23 ⁇ / b> B in the longitudinal direction (X direction) of the absorbent body 23 constituting the absorbent main body 2 as shown in FIG. It is formed on an end flap that is located outward in the longitudinal direction X from the edge (on the side opposite to the lateral center line CL2 side).
- the waistline lower elastic part G2 is formed in the side flap located between the lower end of the side center line CL2 side of the waist elastic part G1 and the lower end of the side seal part S in the vertical direction (X direction).
- the above-described back-side waist flap FB and ventral-side waist flap FA are regions where the end flap (waist stretchable portion G1) is combined with a part of the side flap (trunk lower stretchable portion G2). Moreover, in the diaper 1, the leg expansion-contraction part G3 is formed in the peripheral part of the leg opening part LO, as shown in FIG.
- the outer package 3 has a plurality of joint portions 8 that join the non-skin side sheet 5 and the outer layer sheet 6 in the diaper 1.
- the joint portion 8 is not formed on the skin side sheet 4.
- the back-side waist flap FB and the abdominal-side waist flap FA are bonded and fixed to the non-skin-side sheet 5 and the outer layer sheet 6 at a plurality of bonding portions 8 by heat fusion arranged in a dotted pattern. Is formed.
- the non-skin-side sheet 5 and the outer layer sheet 6 are formed in a region extending from the waist stretchable part G1 to the waistline stretchable part G2 of each of the ventral region A and the dorsal region B.
- the joint portion 8 is formed by superimposing the non-skin side sheet 5 and the outer layer sheet 6 and melting and solidifying the overlapped portion by applying heat embossing.
- a heat embossing apparatus an embossing roll and an anvil roll are provided, and what has the convex part of the shape corresponding to the junction part 8 can be used for the outer peripheral surface of the embossing roll.
- an ultrasonic seal, a laser, or the like can be employed instead of the heat embossing process.
- the interval between the joints 8 and 8 adjacent to each other in the longitudinal direction (X direction) constituting the joint row 8L extending in the longitudinal direction (X direction) is 1 mm or more from the viewpoint of improving sweat diffusibility.
- it is 3 mm or more, more preferably 20 mm or less, more preferably 18 mm or less, specifically more preferably 1 mm or more and 20 mm or less. More preferably, it is 18 mm or less.
- the distance between the joint rows 8L and 8L adjacent in the lateral direction (Y direction) is preferably 4 mm or more, more preferably 6 mm or more, from the viewpoint of improving the evaporation of absorbed sweat.
- it is 20 mm or less, it is more preferable that it is 16 mm or less, specifically, it is more preferable that it is 4 mm or more and 20 mm or less, and it is more preferable that it is 6 mm or more and 16 mm or less.
- the diaper 1 is arranged between the non-skin side sheet 5 and the outer layer sheet 6 fixed at the joint 8 in a state of extending in the horizontal direction (Y direction) and intermittently arranged in the vertical direction (X direction).
- the plurality of elastic members 71 are provided.
- a plurality of elastic members 71 are respectively provided in regions extending from the waist stretchable part G ⁇ b> 1 to the waistline lower stretchable part G ⁇ b> 2 of the ventral region A and the backside region B, respectively.
- the plurality of joint rows 8L are arranged in a stretched state in the lateral direction (Y direction) through the gaps between the joints 8.
- the elastic members 71, 71 adjacent in the longitudinal direction (X direction) are fused. It is preferable that the part 42 is arranged, and it is preferable that the opening 44 of the skin side sheet 4 is arranged.
- the non-skin side sheet is provided on both side edges 3 a 1, 3 a 1 of the ventral region A of the exterior body 3 and both side edges 3 b 1, 3 b 1 of the back region B of the exterior body 3.
- 5 and the outer layer sheet 6 have a pair of outer fixing regions 3T1 and 3T1 joined via an elastic member fixing adhesive, and both side portions along the longitudinal direction (X direction) of the absorbent main body 2
- a non-skin side sheet 5 and an outer layer sheet 6 have a pair of main body side fixing regions 3T2 and 3T2 joined via an elastic member fixing adhesive.
- a plurality of elastic members 71 are arranged between the pair of outer fixing regions 3T1, 3T1, and these elastic members 71 are respectively a pair of outer fixing regions 3T1, 3T1.
- the sheet is fixed between the non-skin side sheet 5 and the outer layer sheet 6, but is not fixed to either the non-skin side sheet 5 or the outer layer sheet 6 between the pair of outer fixing regions 3T1 and 3T1.
- the several elastic member 71 is distribute
- the elastic member 71 is not arranged between the pair of main body side fixing regions 3T2 and 3T2, or the elastic member 71 is finely divided so as not to exhibit elastic stretchability. It is arranged in a state that has been subjected to processing such as.
- arranged to the peripheral part of the leg opening part LO in the expanded state is fixed to the elastic member fixed to the peripheral part of the leg opening part LO. It is being fixed between the non-skin side sheet
- the diaper 1 is disposed between the non-skin-side sheet 5 and the outer layer sheet 6 in a stretched state in the lateral direction (Y direction) and intermittently in the longitudinal direction (X direction). Due to the contraction of the plurality of elastic members 71 arranged, the skin side sheet 4 has a gathered portion G that is deformed so as to swell inward of the diaper 1.
- the waist stretchable part G1 and the waistline lower stretchable part G2 are arranged in a stretched state in the lateral direction (Y direction) between the non-skin side sheet 5 and the outer layer sheet 6 and Due to the contraction of the plurality of elastic members 71 arranged intermittently in the direction (X direction), the outer sheet 6 between the joint rows 8L, 8L adjacent in the lateral direction (Y direction) swells outward.
- the gathered portion G is formed by deforming and deforming so that the skin-side sheet 4 and the non-skin-side sheet 5 fixed via the adhesive 9 swell inward.
- the gathered portion G formed by contracting the elastic member 71 is viewed in cross section as shown in FIG. It is preferable that 60% or more of the entire fused portion 42 is disposed from the half of the depth d4 of the recessed portion recessed to the convex portion side (skin facing surface side), and 75% or more is disposed.
- the upper limit is preferably 100%.
- the formation material of each part of the diaper 1 mentioned above is demonstrated.
- the skin-side sheet 4 is a sheet made of a hydrophobic non-woven fabric composed of hydrophobic fibers
- the non-skin-side sheet 5 is a sheet made of a hydrophilic non-woven fabric composed of hydrophilic fibers.
- the entire outer layer sheet 6 including the folded portion 6R is a hydrophobic fiber.
- seat 5 separate from the outer layer sheet
- hydrophobic fiber constituting the hydrophobic sheet used for the outer layer sheet 6 examples include synthetic fibers, and specifically, those normally used as constituent fibers of various nonwoven fabrics.
- synthetic fibers such as polyethylene (PE) fibers and polypropylene (PP) fibers; fibers using a thermoplastic resin such as polyethylene terephthalate (PET) and polyamide alone; core-sheath type, side-by-side type, etc.
- PET polyethylene terephthalate
- polyamide alone such as polyethylene terephthalate (PET) and polyamide alone
- core-sheath type side-by-side type, etc.
- hydrophilic fiber constituting the hydrophilic sheet used for the non-skin side sheet 5 examples include those obtained by hydrophilizing synthetic fibers, specifically, those obtained by treating hydrophobic synthetic fibers with a hydrophilizing agent, fibers And kneading a hydrophilizing agent.
- a composite nonwoven fabric in which fibers having inherent hydrophilicity, for example, natural or semi-natural fibers are mixed with synthetic fibers can also be used.
- the synthetic fiber is not particularly limited, but is a polyolefin fiber such as polyethylene (PE) fiber or polypropylene (PP) fiber; a fiber made of a thermoplastic resin such as polyethylene terephthalate (PET) or polyamide; a core-sheath type And a composite fiber having a side-by-side structure.
- the hydrophilizing agent used for hydrophilizing the synthetic fiber is not particularly limited as long as it is a general hydrophilizing agent used for hygiene products.
- Specific examples of the hydrophilic fiber include natural cellulose fibers such as non-wood pulp such as wood pulp, cotton pulp, and straw pulp; and regenerated cellulose fibers such as rayon and cupra.
- the hydrophilic sheet includes a hydrophilic cloth in addition to the hydrophilic nonwoven fabric. Examples of the hydrophilic nonwoven fabric include air-through nonwoven fabric, spunbond nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, and melt blown nonwoven fabric.
- the determination of whether the fiber constituting the sheet is hydrophilic or hydrophobic is made based on the contact angle of the constituent fiber measured by the following [Measurement Method of Contact Angle of Fiber]. Specifically, if the contact angle is 90 ° or more, it is determined that the hydrophilicity is low, and if the contact angle is less than 90 °, it is determined that the hydrophilicity is high. [Measurement method of fiber contact angle] For the measurement of the contact angle, for example, a contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used.
- the contact angle is measured immediately using the contact angle meter.
- the measurement is performed at five or more locations of the fibers constituting the vicinity of the inner peripheral wall 42e of the fused portion 42, or the fibers constituting the vicinity of the outer edge of the recessed portion 41, and the average value thereof is taken as the contact angle.
- the measurement environment temperature is 20 ° C.
- the top sheet 21, the back sheet 22, the absorber 23, the leak-proof cuff 24, etc. constituting the absorbent main body 2 various kinds of materials conventionally used for absorbent articles such as disposable diapers are used without particular limitation. Can do.
- a single layer or multilayer nonwoven fabric, a perforated film, or the like can be used.
- a moisture-permeable resin film or the like can be used.
- an absorbent core made of absorbent polymer particles and a fiber material and covered with tissue paper can be used.
- the leak-proof cuff 24, a water-repellent single layer or multilayer nonwoven fabric or the like can be used.
- the elastic member examples include synthetic rubber such as styrene-butadiene, butadiene, isoprene, neoprene, natural rubber, EVA, stretchable polyolefin, A polyurethane etc. can be mentioned.
- a thread-like (thread rubber etc.) having a cross section of a rectangle, a square, a circle, an ellipse, a polygon or the like, or a string-like (flat rubber etc.) can be preferably used.
- Adhesive 9 elastic member fixing elastic member (elastic member 25 for forming leakproof cuff, elastic member 71, leg elastic member 72, etc.), and main body for fixing exterior body 3 and absorbent main body 2 and the like
- the fixing adhesive various hot melt adhesives conventionally used for absorbent articles such as disposable diapers can be used without particular limitation.
- the back waist flap FB includes a hydrophobic skin side sheet 4 and a hydrophilic non-skin side sheet 5, and the hydrophobic skin side sheet 4
- seat 5 side and the opening 44 are provided in each hollow part 41.
- seat 4 is so small that it approaches the opening 44. FIG. That is, the distance between the constituent fibers is gradually narrowed toward the opening 44.
- the wearer's sweat is likely to be drawn from the portion excluding the recessed portion 41 to the recessed portion 41, and the thickness of the recessed portion 41 is so small that it approaches the opening 44. From 44, sweat easily moves to the hydrophilic non-skin-side sheet 5 quickly. The sweat of the wearer in the hydrophilic non-skin side sheet 5 thus transferred is difficult to return to the hydrophobic skin side sheet 4 and the skin again. Thus, since the sweat of the wearer who has moved to the non-skin facing sheet 5 on the non-skin facing surface side is difficult to touch the skin, skin troubles such as eczema, rash and rash can be reduced.
- melting part 42 which the constituent fibers of the skin side sheet
- melting part 42 contains the part which the constituent fiber of the skin side sheet
- an opening 44 is formed in such a fusion part 42.
- the fiber density of the fusion part 42 is higher than the fiber density of the outer peripheral part 43 of the opening 44 in the hollow part 41, and the fiber density of the outer peripheral part 43 is higher than the fiber density of the part excluding the hollow part 41.
- the part that is fused without a gap is liquid-impermeable that does not allow liquid to pass through.
- the wearer wears the diaper 1 while wearing it. Is more likely to be drawn to the depression 41 from the portion excluding the depression 41, and the sweat from the outer peripheral portion 43 having a high fiber density passes through the opening 44 of the fused portion 42 and is a hydrophilic non-skin side sheet. 5 is easier to move to.
- the user's sweat is more easily transferred to the non-skin-side sheet 5 on the non-skin facing surface side, skin troubles such as eczema, rash and rash can be further reduced.
- the said effect can be show
- seat 4 is 30 g / m ⁇ 2 > or less, the said effect can be show
- the diaper 1 As shown in FIG. 2, it has the hydrophobic outer layer sheet 6 on the non-skin facing surface side of the non-skin side sheet 5, and in the region extending from the waist stretchable part G1 to the waistline lower stretchable part G2,
- the plurality of elastic members 71 are arranged in an extended state in the lateral direction (Y direction) through the gaps between the joint portions 8 of the plurality of joint row 8L.
- the elastic member 71 arranged in the stretched state contracts, the skin-side sheet 4 and the non-skin-side sheet 5 and the outer layer are disposed between the adjacent joining portion rows 8L and 8L.
- a fold 3F formed of the sheet 6 is generated, and a hollow portion 3H surrounded by the fold 3F and the fold 3F is formed between the skin side sheet 4 and the non-skin side sheet 5 and the outer layer sheet 6. It becomes like this. Therefore, the evaporability of the sweat of the wearer who has moved to the non-skin-side sheet 5 is improved, and skin troubles such as eczema, rash and rash can be further reduced.
- the distance between the fibers of the constituent fibers constituting the skin side sheet 4 in the dent portion 41 is the opening side. It is preferably smaller than the outer side of 44. More specifically, the inter-fiber distance of the fibers constituting the aperture-side thin region 43ST in the outer peripheral portion 43 is 4/5 or less of the inter-fiber distance of the fibers constituting the vicinity of the outer edge of the recessed portion 41 in the outer peripheral portion 43. Preferably, it is 2/5 or less.
- the inter-fiber distance of the fibers constituting the aperture-side thin region 43ST in the outer peripheral portion 43 and the inter-fiber distance of the fibers constituting the vicinity of the outer edge of the recess 41 are measured by the following method.
- the interfiber distance measured by the following method means that the affinity with water increases as the value decreases.
- the basis weight, thickness, and fiber denier are measured, and the inter-fiber distance is calculated by the equation [Equation 1].
- the thickness is measured as follows. The thickness of the sheet is measured by using a knife, cutter, razor, etc. so as to include the measuring section, cutting in the thickness direction so that the cut surface is not crushed, and observing the cut section with a microscope, and measuring the thickness of the measuring section To do. In thickness measurement, 10 different points are measured, and the average value thereof is calculated as the thickness of the measurement part.
- the contact angle between the skin-side sheet 4 and the ion-exchanged water in the recessed portion 41 is smaller on the opening 44 side than on the outer side of the opening 44.
- the affinity of the skin-side sheet 4 in the recessed portion 41 with water is greater on the opening 44 side than on the outer side of the opening 44.
- the skin-side sheet constituting the opening 44 side (opening-side thin region 43ST) in the outer peripheral portion 43 preferably has a contact angle with ion-exchanged water of 120 ° or less, and 110 ° or less. More preferably it is.
- the skin-side sheet constituting the outer side of the opening 44 preferably has a contact angle with ion exchange water of 120 ° or more, and 130 ° or more. More preferably. If the upper limit of the contact angle of the skin-side sheet is 180 °, a sufficiently satisfactory effect can be obtained.
- the contact angle between the skin-side sheet constituting the aperture-side thin region 43ST in the outer peripheral portion 43 or the skin-side sheet constituting the vicinity of the outer edge of the recessed portion 41 in the outer peripheral portion 43 and ion-exchanged water is measured by the following method. To do. The contact angle measured by the following method means that the lower the value, the higher the affinity with water.
- Measurement was performed using a microscope VHX-1000 manufactured by Keyence Corporation with a medium magnification zoom lens tilted at 90 °.
- a sheet cut into a size of 150 mm in the MD direction and 70 mm in the CD direction was used.
- the measurement environment was 20 ° C./50% RH, and the measurement sample was set on the measurement stage so that it could be observed from the CD direction of the sheet with the measurement surface facing upward.
- 3 ⁇ L of ion-exchanged water is attached to the portion of the measurement sample set on the measurement stage to be measured (in the vicinity of the outer edge of the opening portion thin region 43ST in the outer peripheral portion 43 and the recessed portion 41 in the outer peripheral portion 43). take in.
- the contact angles at 10 points were measured for each of the observation results with clear focus at both ends or one end of the water droplets on the sheet, and the average value thereof was defined as “contact angle”.
- the basis weight of the non-skin side sheet 5 is 10 g / m 2 from the viewpoint of further reducing the amount of sweat that absorbs a large amount of sweat and touches the skin and prevents the sweat from returning from the non-skin side sheet to the skin.
- it is 20 g / m 2 or more, more preferably 50 g / m 2 or less, further preferably 30 g / m 2 or less, specifically 10 g. it is preferably / m 2 or more 50 g / m 2 or less, further preferably 20 g / m 2 or more 30 g / m 2 or less.
- the thickness of the non-skin-side sheet 5 is preferably 100 ⁇ m or more, more preferably 150 ⁇ m or more, and preferably 800 ⁇ m or less in the portion excluding the recessed portion 41. 500 ⁇ m or less, more preferably 100 ⁇ m or more and 800 ⁇ m or less, and even more preferably 150 ⁇ m or more and 500 ⁇ m or less.
- the thickness of the non-skin side sheet 5 is measured using a thickness measuring instrument in a state where a load of 0.05 kPa is applied to the non-skin side sheet 5.
- a laser displacement meter manufactured by OMRON Corporation is used for the thickness measuring instrument. Thickness is measured at 10 points, and the average value is calculated as the thickness.
- the non-skin-side sheet 5 preferably has a blending ratio of hydrophilic fibers to the entire constituent fibers of 80% by mass or more. 90% by mass or more, and the lower limit is preferably 70% by mass.
- the non-skin side sheet 5 has a 30-mm width Klem water absorption height measured according to JIS P 8141, for 60 seconds. It is preferably 20 mm or more, and more preferably 25 mm or more in 60 seconds. Although there is no restriction
- the clem water absorption height of the non-skin side sheet 5 is measured by the following method.
- the non-skin side sheet 5 taken out is cut into a width (length in the longitudinal direction (X direction) of the diaper 1) of 30 mm and a length (length in the lateral direction (Y direction) of the diaper 1) of 150 mm.
- a cutting method that may crush the sample such as a press cutter, is not preferable because it has a high possibility of affecting the result. Therefore, when cutting, the cut surface of the sample is cut so as not to be crushed by using a knife, a cutter, a razor or the like.
- the cut sample is set in a jig specified in JIS P 8141, and the water absorption height after 60 seconds is measured using water as a test solution.
- the test liquid may be appropriately colored with a dye such as Blue No. 1 or methylene blue.
- a dye such as Blue No. 1 or methylene blue.
- the above measurement is performed 5 times and the average value is defined as the water absorption height of the non-skin side sheet 5.
- the measurement environment temperature is 22 ° C.
- the non-skin side sheet 5 has a saturated water absorption of 75 g / m 2 of ion-exchanged water. In is preferably higher, further preferably 100 g / m 2 or more.
- the saturated water absorption amount of the non-skin side sheet 5 is measured by the following method.
- a non-skin side sheet is cut into a width of 50 mm and a length of 50 mm to produce a measurement sample.
- the measurement sample is immersed in ion-exchanged water adjusted to 25 ° C. After 5 minutes from the start of immersion, the sample is taken out from the ion-exchanged water, suspended in a vertical state for 30 seconds and drained. The mass of the sample after water absorption is measured, and the target saturated water absorption is calculated according to the following formula.
- Saturated water absorption (g / m 2 ) (mass of sample after water absorption (g) ⁇ mass of sample before water absorption (g)) / (measurement sample area 0.05 m ⁇ 0.05 m) The above measurement is performed 5 times, and the average value is defined as the saturated water absorption amount of the non-skin side sheet.
- the skin side sheet 4 constituting the exterior body 3 is formed by the folded portion 6R of one outer layer sheet 6 as shown in FIG.
- the body may be a hydrophobic sheet (nonwoven fabric).
- seat 4 what is necessary is just to arrange
- dorsal side waist flap FB is provided is one sheet, However, Multiple sheets may be sufficient. Thus, when there are a plurality of hydrophilic non-skin-side sheets 5, it is preferable that the hydrophilicity becomes stronger as the distance from the skin of the wearer increases.
- the blending ratio of the hydrophilic fibers relative to the entire constituent fibers described above, the basis weight of the non-skin side sheet described above It is preferable that at least one of the Klem water absorption height and the saturated water absorption amount described above is larger than the value of the non-skin side sheet adjacent to the skin side sheet 4.
- seat are ion-exchanged as it leaves
- the contact angle between the fibers constituting the non-skin side sheet and ion-exchanged water is measured by the method described above.
- seat is measured with the following method.
- the outer layer sheet 6 and the non-skin side sheet 5 are joined and fixed by a plurality of joint portions 8 by heat fusion, and the skin side sheet 4 and the non-skin side
- the sheet 5 is fixed via the adhesive 9, but the adhesive 9 may not be disposed.
- the elastic member 71 is disposed between the outer layer sheet 6 and the non-skin side sheet 5, but even if the elastic member 71 is not disposed. Good.
- the exterior body 3 is a pants-type disposable diaper having a continuous shape such as an hourglass shape extending over the ventral region A, the crotch region C, and the dorsal region B.
- the exterior body 3 may be a split-type pants-type disposable diaper that is divided as a separate member into a ventral-side exterior body, a back-side exterior body, and a crotch exterior body.
- the disposable diaper 1 mentioned above although it is a pants-type disposable diaper which has the exterior body 3, it may be a deployment-type disposable diaper.
- the top sheet corresponds to the non-skin-side sheet 5.
- skin contact is made with at least the back waist flap FB of the abdominal side waist flap FA and the back side waist flap FB which are located outward from the front and rear end portions in the longitudinal direction X of the absorbent body and extend in the lateral direction Y. What is necessary is just to arrange
- a disposable diaper having an abdominal waist flap and a dorsal waist flap that are located outward from the front and rear ends and extend in the lateral direction, wherein at least the dorsal waist flap is a hydrophobic surface forming a skin contact surface
- a disposable diaper comprising a portion and an opening penetrating the skin-side sheet in each of the recess portions, and the thickness of the recess portion of the skin-side sheet decreases as the opening approaches.
- seat is a disposable diaper as described in said ⁇ 1> whose diameter is 0.5 mm or more and 3 mm or less.
- seat is a disposable diaper as described in said ⁇ 1> or ⁇ 2> which is 1/10 or less of the diameter of this hole.
- the disposable diaper according to ⁇ 4> wherein the thin region of the hollow portion has an annular shape, and a diameter thereof is 1.5 times or more a diameter of the opening.
- the skin-side sheet includes a fusion part in which the constituent fibers of the skin-side sheet are fused in each of the recesses, and the constituent parts of the skin-side sheet are melted by melting the constituent fibers of the skin-side sheet.
- Disposable diapers ⁇ 8>
- the disposable diaper is arranged on the non-skin facing surface side of the non-skin side sheet in a state of extending in a lateral direction between the non-skin side sheet and the outer layer sheet and a hydrophobic outer layer sheet and the non-skin side sheet.
- a plurality of elastic members intermittently disposed in the longitudinal direction of the disposable diaper, and the opening of the skin side sheet is disposed between the elastic members adjacent in the longitudinal direction.
- the skin-side sheet includes a fusion part in which the constituent fibers of the skin-side sheet are fused in each recess, and the skin-side sheet and the non-skin-side sheet are bonded via an adhesive.
- the disposable diaper according to any one of ⁇ 1> to ⁇ 8>, wherein a position where the adhesive is disposed overlaps the fusion part of the skin side sheet.
- seat is provided with the fusion
- the disposable diaper according to any one of to ⁇ 9>.
- ⁇ 11> The disposable diaper has a hydrophobic outer layer sheet on the non-skin facing surface side of the non-skin side sheet, and the skin side sheet is formed by a folded portion of the outer layer sheet ⁇ 1> to ⁇ 10 > The disposable diaper of any one of>.
- the skin-side sheet includes a fusion part in which the constituent fibers of the skin-side sheet are fused in each of the depressions, and the opening (a fusion part in which the opening is arranged) is formed in the skin.
- the disposable diaper according to any one of ⁇ 1> to ⁇ 11>, wherein the disposable diaper is disposed intermittently over the entire side sheet.
- the skin-side sheet includes a fusion part in which the constituent fibers of the skin-side sheet are fused in each of the depressions, and the fusion part has the opening and forms a line along the vertical direction.
- the disposable diaper according to ⁇ 13>, wherein the disposable diaper is preferably 18 mm or less.
- the interval between the fusion part rows adjacent in the lateral direction is preferably 4 mm or more, more preferably 6 mm or more, and preferably 20 mm or less, more preferably 16 mm or less.
- the skin side sheet has a fusion part in which the constituent fibers of the skin side sheet are fused in each of the depressions, and when the depth of the depression 41 in the inner peripheral wall of the fusion part is d3, The thickness of the fusion part at a position 0.50 times the depth d3 outward from the inner peripheral wall is 20% or more and 75% or less of the thickness d2 of the part excluding the depression part.
- the skin side sheet includes a fusion part in which the constituent fibers of the skin side sheet are fused in each of the depressions, and is 1.5 times the depth d3 outward from the inner peripheral wall of the fusion part.
- the thickness at the other position is preferably 55% or more and 95% or less, more preferably 70% or more and 90% or less of the thickness d2 of the portion excluding the depression 41.
- the skin-side sheet includes a fusion part in which the constituent fibers of the skin-side sheet are fused in each recess, and the fusion part of the skin-side sheet has a thickness d5 of an inner peripheral wall of the fusion part. Is preferably 60 ⁇ m or less, more preferably 45 ⁇ m or less, and the lower limit is 10 ⁇ m.
- the disposable diaper according to any one of ⁇ 1> to ⁇ 17>.
- the opening of the skin side sheet has a diameter L1 of preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 3 mm or less, and 2.5 mm or less. More preferably, it is preferably 0.5 mm or more and 3 mm or less, more preferably 1 mm or more and 2.5 mm or less, and the disposable according to any one of the above items ⁇ 1> to ⁇ 18> Diapers.
- the skin-side sheet includes a fusion part in which the constituent fibers of the skin-side sheet are fused in each recess, and the thickness d5 of the inner peripheral wall of the fusion part is 1 of the diameter L1 of the opening.
- the disposable diaper according to any one of the above items ⁇ 1> to ⁇ 19>, which is preferably / 10 or less, more preferably 1/30 or less, and the lower limit is 1/50.
- the opening of the skin-side sheet has an opening area of one opening of preferably 0.5 mm 2 or more, more preferably 0.75 mm 2 or more, and 5 mm 2 or less.
- the ratio of the total aperture area to the total area of the skin-side sheet is preferably 1% or more, more preferably 3% or more, preferably 15% or less, and preferably 10% or less. More preferably, the disposable diaper according to any one of the above items ⁇ 1> to ⁇ 21>.
- the opening of the skin side sheet is formed in a thin region having a thickness of 70% or less of a thickness d2 of a portion of the skin side sheet excluding the recess in the outer peripheral portion of the recess. Preferably, it is further preferably formed in the aperture-side thin region having a thickness of 40% or less of the thickness d2 in the thin region, according to any one of the above items ⁇ 1> to ⁇ 22>.
- Disposable diapers Any one of the above items ⁇ 1> to ⁇ 23>, wherein the thickness d2 of the skin-side sheet excluding the dent is preferably 600 ⁇ m or less, more preferably 350 ⁇ m or less, and the lower limit is 100 ⁇ m. Disposable diapers described in 1.
- the thin region of the indented portion has a diameter L2 which is preferably 1.5 times or more, more preferably 2 times or more, and an upper limit of 3 times the diameter L1 of the opening.
- the skin-side sheet has a basis weight of 30 g / m 2 or less, preferably 20 g / m 2 or less, preferably 9 g / m 2 or more, and more preferably 10 g / m 2 or more.
- the back waist flap and the abdomen waist flap are formed by bonding and fixing the non-skin side sheet 5 and the outer layer sheet 6 at a plurality of joints 8 arranged in the form of dots.
- the non-skin-side sheet has a hydrophobic outer layer sheet on the non-skin-facing surface side of the non-skin-side sheet, and the non-skin-side sheet is provided in a region extending from a waist stretchable portion to a waistline lower stretchable portion of each of the ventral region and the dorsal region.
- the disposable diaper according to any one of the above items ⁇ 1> to ⁇ 28>.
- the interval between the joint portions adjacent in the longitudinal direction constituting the joint row extending in the vertical direction is preferably 1 mm or more, more preferably 3 mm or more, and preferably 20 mm or less.
- the interval between the joint rows adjacent in the lateral direction is preferably 4 mm or more, more preferably 6 mm or more, and preferably 20 mm or less, more preferably 16 mm or less.
- the disposable diaper is arranged on the non-skin facing surface side of the non-skin side sheet in a state of extending in a lateral direction between the non-skin side sheet and the outer layer sheet and a hydrophobic outer layer sheet and the non-skin side sheet.
- a plurality of elastic members intermittently disposed in the longitudinal direction of the disposable diaper, and the skin-side sheet has a fusion portion in each of the recessed portions, and is between the elastic members adjacent in the longitudinal direction.
- the disposable diaper according to any one of ⁇ 1> to ⁇ 31>, wherein the fusion part is preferably disposed, and the opening of the skin side sheet is preferably disposed.
- the disposable diaper is arranged on the non-skin facing surface side of the non-skin side sheet in a state of extending in a lateral direction between the non-skin side sheet and the outer layer sheet and a hydrophobic outer layer sheet and the non-skin side sheet.
- the gathered portion formed by contraction of the elastic member is viewed in cross section, from the half position of the depth d4 of the concave portion recessed on the non-skin side of the skin side sheet, to the convex portion side (skin facing surface side)
- 60% or more of the entire fused portion is disposed, preferably 75% or more is disposed, and the upper limit is preferably 100%.
- the inter-fiber distance is preferably 4/5 or less, more preferably 2/5 or less of the inter-fiber distance of the fibers constituting the vicinity of the outer edge of the recess in the outer peripheral portion ⁇ 1>.
- the hole-side thin region having a thickness of 40% or less of the thickness d2 in the thin region having a thickness of 70% or less of the thickness d2 of the portion excluding the hollow portion in the outer peripheral portion of the opening is configured.
- the skin-side sheet constituting the vicinity of the outer edge of the recess in the outer peripheral portion of the opening preferably has a contact angle with ion exchange water of 120 ° or more, and more preferably 130 ° or more.
- the skin-side sheet has a fusion part in which the constituent fibers of the skin-side sheet are fused in each of the depressions, the contact angle between the vicinity of the fusion part and ion-exchanged water, and the outer periphery of the opening It is preferable that the contact angle difference between the vicinity of the outer edge of the depression and the ion exchange water in the portion is large, the contact angle difference is preferably 10 ° or more, and more preferably 20 ° or more.
- the basis weight of the non-skin side sheet is preferably 10 g / m 2 or more, more preferably 20 g / m 2 or more, and preferably 50 g / m 2 or less, 30 g / m 2.
- the thickness of the non-skin side sheet is preferably 100 ⁇ m or more, more preferably 150 ⁇ m or more, and preferably 800 ⁇ m or less, and 500 ⁇ m or less in the portion excluding the dent.
- the non-skin-side sheet preferably has a hydrophilic fiber content of 80% by mass or more, more preferably 90% by mass or more, and a lower limit of 70% by mass with respect to the entire constituent fibers.
- the non-skin-side sheet preferably has a 30 mm-wide clem water absorption height measured in accordance with JIS P 8141 of 20 mm or more in 60 seconds, and more preferably 25 mm or more in 60 seconds.
- the disposable diaper according to any one of> to ⁇ 41>.
- the non-skin side sheet preferably has a saturated water absorption of 75 g / m 2 or more, more preferably 100 g / m 2 or more, and more preferably any one of the above items ⁇ 1> to ⁇ 42>. Disposable diapers described in 1.
- the absorbed sweat can be quickly transferred to the non-skin facing surface side, and skin troubles such as eczema, rash and rash can be reduced.
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
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- Orthopedic Medicine & Surgery (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Description
本発明の使い捨ておむつは、縦方向Xに腹側領域Aおよび背側領域Bと、それらA,Bの間に位置する股下領域Cとを備え、腹側領域Aと背側領域Bとに亘って吸収体23を有し、吸収体23の縦方向Xの前後端部23A,23Bそれぞれから外方に位置して横方向Yに延びる腹側ウエストフラップFA及び背側ウエストフラップFBを有している。ここで、腹側領域Aとは使い捨ておむつの着用時に着用者の腹側に配される領域であり、背側領域Bとは使い捨ておむつの着用時に着用者の背側に配される領域である。そして、腹側ウエストフラップFAとは、吸収体23の縦方向Xの腹側領域A側の前端部23Aの端縁から縦方向X外方に位置して横方向Yに延びる領域と、吸収体23の縦方向Xの腹側領域A側の前端部23Aから横方向Yに延びる領域とを合わせた領域を意味する。また、背側ウエストフラップFBとは、吸収体23の縦方向Xの背側領域B側の後端部23Bの端縁から縦方向X外方に位置して横方向Yに延びる領域と、吸収体23の縦方向Xの背側領域B側の後端部23Bから横方向Yに延びる領域とを合わせた領域を意味する。
また、おむつ1は、図2に示す、縦方向(X方向)に延びる縦中心線CL1に対して左右対称形となっている。尚、図2中のCL2は、おむつ1を二分する横方向(Y方向)に延びる横中心線であり、縦中心線CL1に直交している。
また、図2に示すように展開させかつ伸長させた状態を平面視して、横方向(Y方向)に隣り合う融着部列42L,42Lどうしの間隔は、汗の拡散性向上の観点から、4mm以上であることが好ましく、6mm以上であることがより好ましく、そして、20mm以下であることが好ましく、16mm以下であることがより好ましく、具体的には、4mm以上20mm以下であることがより好ましく、6mm以上16mm以下であることがより好ましい。
また、肌側シート4を構成する窪み部41を除く部分の厚みd2の測定は、肌側シート4に0.05kPaの荷重を加えた状態で、厚み測定器を用いて測定する。厚み測定器にはオムロン社製のレーザー変位計を用いる。厚み測定は、10点測定し、それらの平均値を算出して窪み部41を除く部分の厚みとする。
開孔44の外周部分43が、融着部42の内周壁42eに向かって徐々に厚みが薄くなっていることは、前記融着部42の内周壁42eから外方に前記深さ(d3)の0.50倍離れた位置での厚みが、前記融着部42の内周壁42eから外方に前記深さ(d3)の1.5倍離れた位置での厚みより小さいことで確認できる。
また、肌側シート4における該窪み部41を除く部分の厚みd2(図4参照)は、非肌側シート5から肌へ汗が戻らない観点から、から、600μm以下であることが好ましく、350μm以下であることがより好ましく、下限は100μmである。
また、横方向(Y方向)に隣り合う接合部列8L,8Lどうしの間隔は、吸収した汗の蒸発性向上の観点から、4mm以上であることが好ましく、6mm以上であることがより好ましく、そして、20mm以下であることが好ましく、16mm以下であることがより好ましく、具体的には、4mm以上20mm以下であることがより好ましく、6mm以上16mm以下であることがより好ましい。
また、おむつ1の胴回り下部伸縮部G2では、複数本の弾性部材71が、外側固定領域3T1と本体側固定領域3T2との間に亘って配されており、それらの弾性部材71は、外側固定領域3T1と本体側固定領域3T2とのそれぞれにおいて、非肌側シート5と外層シート6との間に固定されている一方、外側固定領域3T1と本体側固定領域3T2との間においては、非肌側シート5及び外層シート6の何れにも固定されていない。おむつ1の胴回り下部伸縮部G2では、一対の本体側固定領域3T2,3T2の間に、弾性部材71が配されていないか、或いは、弾性部材71が、弾性伸縮性を発現しないように細かく分断される等の処理を施された状態で配されている。
肌側シート4は、疎水性の繊維で構成された疎水性の不織布等からなるシートであり、非肌側シート5は、親水性の繊維で構成された親水性の不織布等からなるシートである。
おむつ1では、外装体3を構成する肌側シート4が外層シート6の折り返し部分6Rで形成されているので、折り返し部分6R(肌側シート4)を含む外層シート6の全体が疎水性の繊維で構成された疎水性のシートで形成されており、外層シート6とは別体の非肌側シート5が親水性のシートで構成されている。
〔繊維の接触角の測定方法〕
接触角の測定には、例えば協和界面科学株式会社製の接触角計MCA-Jを用いる。具体的には、外周部分43を構成する繊維の表面に、イオン交換水を滴下(約20ピコリットル)した後、直ちに前記接触角計を用いて接触角度の測定を行う。測定は、融着部42の内周壁42e近傍を構成する繊維、又は窪み部41の外縁近傍を構成する繊維の5箇所以上の箇所で行い、それらの平均値を接触角とする。尚、測定環境温度は20℃とする。
おむつ1では、図2~図5に示すように、少なくとも背側ウエストフラップFBが、疎水性の肌側シート4と親水性の非肌側シート5とを有し、疎水性の肌側シート4が、非肌側シート5側に向かって窪んだ窪み部41と、各窪み部41内に開孔44を備えている。そして、肌側シート4の窪み部41の厚みが開孔44に近づくほど小さくなっている。即ち、構成繊維の繊維間距離が、開孔44に向かって徐々に狭く形成されている。その為、おむつ1の着用中に、着用者の汗が、窪み部41を除く部分から窪み部41に引き寄せられ易く、そして、窪み部41の厚みが開孔44に近づくほど小さいので、開孔44から汗が親水性の非肌側シート5に素早く移行し易い。このように移行した親水性の非肌側シート5内の着用者の汗は、再び疎水性の肌側シート4や肌に戻り難くなっている。このように、非肌対向面側の非肌側シート5に移行した着用者の汗が肌に触れ難いので、湿疹、汗疹、かぶれ等の皮膚トラブルを低減することができる。
外周部分43における開孔側薄領域43STを構成する繊維の繊維間距離、及び窪み部41の外縁近傍を構成する繊維の繊維間距離は、下記の方法により測定する。下記の方法により測定する繊維間距離は、その値が小さくなれば、水との親和性が高くなることを意味する。
測定する部分それぞれにおいて、坪量、厚み、および繊維デニールを測定し、[数1]の式により繊維間距離を算出する。同一のシートの異なる部分を測定する場合、シートの坪量および繊維デニールに変化はなく、厚みのみが変化する。厚みは以下のように測定する。シートの厚みの測定は、測定部を含むように、ナイフ、カッター、剃刀等を用いて切断面が潰れないように厚み方向にカットして、カット断面を顕微鏡観察し、測定部の厚みを測定する。厚み測定は、異なる10点を測定し、それらの平均値を算出して測定部の厚みとする。
また、開孔44の外方側(外周部分43における窪み部41の外縁近傍)を構成する肌側シートは、イオン交換水との接触角が、120°以上であることが好ましく、130°以上であることが更に好ましい。該構成する肌側シートの接触角の上限は180°であれば十分に満足すべき効果が得られる。
さらに、開孔44側(開孔側薄領域43ST)の肌側シートとイオン交換水との接触角と、開孔44の外方側(外周部分43における窪み部41の外縁近傍)とイオン交換水との接触角差が、大きいことが好ましい。詳述すると、その接触角差は、10°以上であることが好ましく、20°以上であることが更に好ましい。
外周部分43における開孔側薄領域43STを構成する肌側シート、又は外周部分43における窪み部41の外縁近傍を構成する肌側シートと、イオン交換水との接触角は、下記の方法により測定する。下記の方法により測定する接触角は、その値が小さくなれば、水との親和性が高くなることを意味する。
株式会社キーエンス製のマイクロスコープVHX-1000に中倍率ズームレンズを90°に倒した状態で使用して計測を行った。測定用サンプルは、MD方向150mm×CD方向70mmの大きさにカットしたシートを用いた。測定環境は、20℃/50%RHであり、測定用サンプルは、測定面を上向きにした状態として、シートのCD方向から観察できるように測定ステージにセットした。次いで、測定ステージにセットされた測定用サンプルの測定したい部分(外周部分43おける開孔側薄領域43ST及び外周部分43における窪み部41の外縁近傍)に、イオン交換水を3μL付着させ、画像を取り込む。シート上の水滴の両端もしくは片端における焦点が鮮明な観察結果それぞれ10点の接触角を計測し、それらの平均値を「接触角」とした。
同様の観点から、非肌側シート5は、その厚みが、窪み部41を除く部分において、100μm以上であることが好ましく、150μm以上であることが更に好ましく、そして、800μm以下であることが好ましく、500μm以下であることが更に好ましく、具体的には、100μm以上800μm以下であることが好ましく、150μm以上500μm以下であることが更に好ましい。非肌側シート5の厚みの測定は、非肌側シート5に0.05kPaの荷重を加えた状態で、厚み測定器を用いて測定する。厚み測定器にはオムロン社製のレーザー変位計を用いる。厚み測定は、10点測定し、それらの平均値を算出して厚みとする。
非肌側シート5のクレム吸水高さは、下記の方法により測定する。
パンツ型使い捨ておむつの外装体から、非肌側シート5を取り出す際に、肌側シート4、非肌側シート5及び外層シート6が、熱融着又は接着剤により固定されている場合には、該固定された部分を、溶剤又はドライヤー等による熱風により溶融等して取り除き、非肌側シート5を取り出す。取り出した非肌側シート5をサンプルとして、JIS P 8141の試験方法に準じてクレム吸水高さを測定する。具体的には、取り出した非肌側シート5を、幅(おむつ1の縦方向(X方向)の長さ)30mm、長さ(おむつ1の横方向(Y方向)の長さ)150mmにカットする。カットに際しては、押し切りカッターなど、サンプルを押しつぶす可能性のある切断方法は、結果に影響を及ぼす可能性が高く好ましくない。そのため、カットに際しては、ナイフ、カッター、剃刀等を用いてサンプルの切断面が潰れないようにカットする。次に、JIS P 8141に規定する冶具にカット後のサンプルをセットし、試験液に水を用いて、60秒後のクレム吸水高さを測定する。吸い上げ高さの判別を容易にするため、青色1号やメチレンブルー等の染料で試験液を適宜着色してもよい。以上の測定を5回行い、その平均値を、非肌側シート5のクレム吸水高さとする。尚、測定環境温度は22℃とする。
以上であることが好ましく、100g/m2以上であることが更に好ましい。非肌側シート5の飽和吸水量の上限に特に制限はないが、300g/m2であれば十分に満足すべき効果が得られる。
非肌側シート5の飽和吸水量は、下記の方法により測定する。
非肌側シートを幅50mm、長さ50mmに切断して,測定試料を作製する。測定試料を、25℃に調温したイオン交換水に浸漬させる。浸漬開始から5分後に試料をイオン交換水から取り出し、30秒間垂直状態に吊るして水切りする。吸水後の試料の質量を測定し、次式に従って目的とする飽和吸水量を算出する。飽和吸水量(g/m2)=(吸水後の試料の質量(g)-吸水前の試料の質量(g))/(測定試料面積 0.05m×0.05m)として算出する。以上の測定を5回行い、その平均値を、非肌側シートの飽和吸水量とする。
例えば、上述したおむつ1は、外装体3を構成する肌側シート4は、図2に示すように、1枚の外層シート6の折り返し部分6Rで形成されているが、外層シート6とは別体の疎水性のシート(不織布)であってもよい。このような別体の肌側シート4を配置する場合、腹側ウエストフラップFA及び背側ウエストフラップFBの内の少なくとも背側ウエストフラップFBにのみ、別体の肌側シート4を配置すればよい。
縦方向に腹側領域および背側領域と、それらの間に位置する股下領域とを備え、前記腹側領域と前記背側領域とに亘って吸収体を有し、該吸収体の縦方向の前後端部それぞれから外方に位置して横方向に延びる腹側ウエストフラップ及び背側ウエストフラップを有する使い捨ておむつであって、少なくとも前記背側ウエストフラップは、肌当接面を形成する疎水性の肌側シートと、該肌側シートの非肌対向面側に位置する親水性の非肌側シートとを有し、前記肌側シートは、前記非肌側シート側に向かって窪んだ複数の窪み部と、各該窪み部内に該肌側シートを貫通する開孔とを備え、前記肌側シートの前記窪み部は、その厚みが、前記開孔に近づくほど小さくなっている、使い捨ておむつ。
<2>
前記肌側シートの前記開孔は、その直径が、0.5mm以上3mm以下である前記<1>に記載の使い捨ておむつ。
<3>
前記肌側シートの前記開孔の周縁部の厚みは、該開孔の直径の1/10以下である前記<1>又は<2>に記載の使い捨ておむつ。
<4>
前記肌側シートの前記開孔は、前記肌側シートにおける前記窪み部を除く部分の厚みの70%以下の厚みである該窪み部の薄領域内に形成されている前記<1>~<3>の何れか1に記載の使い捨ておむつ。
前記窪み部の前記薄領域は、円環状であり、その直径が、前記開孔の直径の1.5倍以上である前記<4>に記載の使い捨ておむつ。
<6>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、前記融着部は、前記肌側シートの構成繊維が溶融して該構成繊維どうしが隙間なく融着している部分を含み、前記開孔は、前記融着部内に形成されている前記<1>~<5>の何れか1に記載の使い捨ておむつ。
<7>
前記窪み部における前記肌側シートの水との親和性は、前記開孔側の方が該開孔の外方側に比べて、大きい前記<1>~<6>の何れか1に記載の使い捨ておむつ。
<8>
前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートと、該非肌側シートと該外層シートと間に前記使い捨ておむつの横方向に伸長した状態で配され且つ該使い捨ておむつの縦方向に間欠的に配された複数の弾性部材とを有し、縦方向に隣り合う前記弾性部材どうしの間に、前記肌側シートの前記開孔が配されている前記<1>~<7>の何れか1に記載の使い捨ておむつ。
<9>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、前記肌側シートと前記非肌側シートとは、接着剤を介して接着されており、前記接着剤の配された位置が、前記肌側シートの前記融着部と重なっている前記<1>~<8>の何れか1に記載の使い捨ておむつ。
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部は、融着している部分がフィルム化している前記<1>~<9>の何れか1に記載の使い捨ておむつ。
<11>
前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートを有し、前記肌側シートが、前記外層シートの折り返し部分で形成されている前記<1>~<10>の何れか1に記載の使い捨ておむつ。
<12>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、前記開孔(開孔が内部に配されている融着部)は、前記肌側シートの全域に間欠的に配されている前記<1>~<11>の何れか1に記載の使い捨ておむつ。
<13>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部は、前記開孔を有し、かつ縦方向に沿って一列をなすように間欠的に配されており、その複数の融着部からなる融着部列が、横方向に間隔を開けて複数列配されている前記<1>~<12>の何れか1に記載の使い捨ておむつ。
<14>
縦方向に延びる前記融着部列を構成する縦方向に隣り合う前記融着部どうしの間隔は、1mm以上であることが好ましく、3mm以上であることがより好ましく、そして、20mm以下であることが好ましく、18mm以下であることがより好ましい前記<13>に記載の使い捨ておむつ。
横方向に隣り合う前記融着部列どうしの間隔は、4mm以上であることが好ましく、6mm以上であることがより好ましく、そして、20mm以下であることが好ましく、16mm以下であることがより好ましい前記<13>又は<14>に記載の使い捨ておむつ。<16>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部の内周壁における窪み部41の深さをd3とした場合に、該融着部の前記内周壁から外方に前記深さd3の0.50倍離れた位置での厚みは、該窪み部を除く部分の厚みd2の、20%以上75%以下であることが好ましく、30%以上65%以下であることが更に好ましい前記<1>~<15>の何れか1に記載の使い捨ておむつ。
<17>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部の内周壁から外方に前記深さd3の1.5倍離れた位置での厚みは、該窪み部41を除く部分の厚みd2の、55%以上95%以下であることが好ましく、70%以上90%以下であることが更に好ましい前記<1>~<16>の何れか1に記載の使い捨ておむつ。
<18>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該肌側シートの前記融着部は、該融着部の内周壁の厚みd5が、60μm以下であることが好ましく、45μm以下であることが更に好ましく、下限は10μmである前記<1>~<17>の何れか1に記載の使い捨ておむつ。
<19>
前記肌側シートの前記開孔は、その直径L1が、0.5mm以上であることが好ましく、1mm以上であることが更に好ましく、そして、3mm以下であることが好ましく、2.5mm以下であることが更に好ましく、具体的には、0.5mm以上3mm以下であることが好ましく、1mm以上2.5mm以下であることが更に好ましい前記<1>~<18>の何れか1に記載の使い捨ておむつ。
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部の内周壁の厚みd5は、前記開孔の直径L1の、1/10以下であることが好ましく、1/30以下であることが更に好ましく、下限は1/50である前記<1>~<19>の何れか1に記載の使い捨ておむつ。
<21>
前記肌側シートの前記開孔は、該開孔一つの開孔面積が、0.5mm2以上であることが好ましく、0.75mm2以上であることが更に好ましく、5mm2以下であることが好ましく、4mm2以下であることが更に好ましい前記<1>~<20>の何れか1に記載の使い捨ておむつ。
<22>
前記肌側シートの全面積に対する全体の前記開孔面積の比率は、1%以上であることが好ましく、3%以上であることがより好ましく、15%以下であることが好ましく、10%以下であることがより好ましい前記<1>~<21>の何れか1に記載の使い捨ておむつ。
<23>
前記肌側シートの前記開孔は、前記窪み部の外周部分内の、前記肌側シートにおける前記窪み部を除く部分の厚みd2の70%以下の厚みである薄領域内に形成されていることが好ましく、さらに、前記薄領域内の、厚みd2の40%以下の厚みである開孔側薄領域内に形成されていることが更に好ましい前記<1>~<22>の何れか1に記載の使い捨ておむつ。
<24>
前記肌側シートにおける前記窪み部を除く部分の厚みd2は、600μm以下であることが好ましく、350μm以下であることがより好ましく、下限は100μmである前記<1>~<23>の何れか1に記載の使い捨ておむつ。
前記窪み部における前記開孔の外周部分の薄領域は、前記外周部分と同様に、円環状に形成されている前記<1>~<24>の何れか1に記載の使い捨ておむつ。
<26>
前記窪み部の薄領域は、その直径L2が、前記開孔の直径L1の、1.5倍以上であることが好ましく、2倍以上であることが更に好ましく、上限は3倍である前記<1>~<25>の何れか1に記載の使い捨ておむつ。
<27>
前記肌側シートは、坪量が、30g/m2以下であり、20g/m2以下であることが好ましく、9g/m2以上であることが好ましく、10g/m2以上であることが更に好ましい前記<1>~<26>の何れか1に記載の使い捨ておむつ。
<28>
前記背側ウエストフラップ及び前記腹側ウエストフラップは、非肌側シート5と外層シート6とが、散点状に配置された複数の接合部8にて接合固定されて形成されている前記<1>~<27>の何れか1に記載の使い捨ておむつ。
<29>
前記非肌側シートの非肌対向面側に疎水性の外層シートを有し、前記腹側領域及び前記背側領域それぞれのウエスト伸縮部から胴回り下部伸縮部に亘る領域に、前記非肌側シートと前記外層シートとの接合部が、縦方向に沿って一列をなすように間欠的に配されており、その複数の接合部からなる接合部列が、横方向に間隔を開けて複数列配されている前記<1>~<28>の何れか1に記載の使い捨ておむつ。
縦方向に延びる前記接合部列を構成する縦方向に隣り合う前記接合部どうしの間隔は、1mm以上であることが好ましく、3mm以上であることがより好ましく、そして、20mm以下であることが好ましく、18mm以下であることがより好ましい前記<29>に記載の使い捨ておむつ。
<31>
横方向に隣り合う前記接合部列どうしの間隔は、4mm以上であることが好ましく、6mm以上であることがより好ましく、そして、20mm以下であることが好ましく、16mm以下であることがより好ましい前記<29>又は<30>に記載の使い捨ておむつ。<32>
前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートと、該非肌側シートと該外層シートと間に前記使い捨ておむつの横方向に伸長した状態で配され且つ該使い捨ておむつの縦方向に間欠的に配された複数の弾性部材とを備え、前記肌側シートは、各前記窪み部内に融着部を有し、縦方向に隣り合う前記弾性部材どうしの間に、前記融着部が配されていることが好ましく、前記肌側シートの前記開孔が配されていることが好ましい前記<1>~<31>の何れか1に記載の使い捨ておむつ。
<33>
前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートと、該非肌側シートと該外層シートと間に前記使い捨ておむつの横方向に伸長した状態で配され且つ該使い捨ておむつの縦方向に間欠的に配された複数の弾性部材とを備え、前記肌側シートは、各前記窪み部内に融着部を有し、
該弾性部材が収縮して形成されたギャザー部を、断面視して、前記肌側シートの非肌側に凹む凹部の深さd4の半分の位置から凸部側(肌対向面側)に、前記融着部の全体の、60%以上が配置されていることが好ましく、75%以上が配置されていることが好ましく、上限は100%であることが好ましい前記<1>~<32>の何れか1に記載の使い捨ておむつ。
<34>
前記窪み部における前記肌側シートを構成する構成繊維の繊維間距離は、前記開孔側の方が該開孔の外方側に比べて小さいことが好ましい前記<1>~<33>の何れか1に記載の使い捨ておむつ。
前記開孔の外周部分内の、前記窪み部を除く部分の厚みd2の70%以下の厚みである薄領域内の、厚みd2の40%以下の厚みである開孔側薄領域を構成する繊維の繊維間距離は、前記外周部分における前記窪み部の外縁近傍を構成する繊維の繊維間距離の、4/5以下であることが好ましく、2/5以下であることが更に好ましい前記<1>~<34>の何れか1に記載の使い捨ておむつ。
<36>
前記開孔の外周部分内の、前記窪み部を除く部分の厚みd2の70%以下の厚みである薄領域内の、厚みd2の40%以下の厚みである開孔側薄領域を構成する前記肌側シートは、イオン交換水との接触角が、120°以下であることが好ましく、110°以下であることが更に好ましい前記<1>~<35>の何れか1に記載の使い捨ておむつ。
<37>
前記開孔の外周部分における前記窪み部の外縁近傍を構成する前記肌側シートは、イオン交換水との接触角が、120°以上であることが好ましく、130°以上であることが更に好ましい前記<1>~<36>の何れか1に記載の使い捨ておむつ。
<38>
前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を有し、該融着部近傍とイオン交換水との接触角と、前記開孔の外周部分における前記窪み部の外縁近傍とイオン交換水との接触角差が、大きいことが好ましく、その接触角差は、10°以上であることが好ましく、20°以上であることが更に好ましい前記<1>~<37>の何れか1に記載の使い捨ておむつ。
<39>
前記非肌側シートは、その坪量が、10g/m2以上であることが好ましく、20g/m2以上であることが更に好ましく、そして、50g/m2以下であることが好ましく、30g/m2以下であることが更に好ましい前記<1>~<38>の何れか1に記載の使い捨ておむつ。
前記非肌側シートは、その厚みが前記窪み部を除く部分において、100μm以上であることが好ましく、150μm以上であることが更に好ましく、そして、800μm以下であることが好ましく、500μm以下であることが更に好ましい前記<1>~<39>の何れか1に記載の使い捨ておむつ。
<41>
前記非肌側シートは、その構成繊維全体に対する親水性繊維の配合率が、80質量%以上であることが好ましく、90質量%以上であることが更に好ましく、下限は70質量%であることが好ましい前記<1>~<40>の何れか1に記載の使い捨ておむつ。
<42>
前記非肌側シートは、JIS P 8141に準じて測定された30mm幅のクレム吸水高さが、60秒で20mm以上であることが好ましく、60秒で25mm以上であることが更に好ましい前記<1>~<41>の何れか1に記載の使い捨ておむつ。
<43>
前記非肌側シートは、イオン交換水の飽和吸水量が、75g/m2以上であることが好ましく、100g/m2以上であることが更に好ましい前記<1>~<42>の何れか1に記載の使い捨ておむつ。
Claims (43)
- 縦方向に腹側領域および背側領域と、それらの間に位置する股下領域とを備え、前記腹側領域と前記背側領域とに亘って吸収体を有し、該吸収体の縦方向の前後端部それぞれから外方に位置して横方向に延びる腹側ウエストフラップ及び背側ウエストフラップを有する使い捨ておむつであって、
少なくとも前記背側ウエストフラップは、肌当接面を形成する疎水性の肌側シートと、該肌側シートの非肌対向面側に位置する親水性の非肌側シートとを有し、
前記肌側シートは、前記非肌側シート側に向かって窪んだ複数の窪み部と、各該窪み部内に該肌側シートを貫通する開孔とを備え、
前記肌側シートの前記窪み部は、その厚みが、前記開孔に近づくほど小さくなっている、使い捨ておむつ。 - 前記肌側シートの前記開孔は、その直径が、0.5mm以上3mm以下である請求項1に記載の使い捨ておむつ。
- 前記肌側シートの前記開孔の周縁部の厚みは、該開孔の直径の1/10以下である請求項1又は2に記載の使い捨ておむつ。
- 前記肌側シートの前記開孔は、前記肌側シートにおける前記窪み部を除く部分の厚みの70%以下の厚みである該窪み部の薄領域内に形成されている請求項1~3の何れか1項に記載の使い捨ておむつ。
- 前記窪み部の前記薄領域は、円環状であり、その直径が、前記開孔の直径の1.5倍以上である請求項4に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、前記融着部は、前記肌側シートの構成繊維が溶融して該構成繊維どうしが隙間なく融着している部分を含み、前記開孔は、前記融着部内に形成されている請求項1~5の何れか1項に記載の使い捨ておむつ。
- 前記窪み部における前記肌側シートの水との親和性は、前記開孔側の方が該開孔の外方側に比べて、大きい請求項1~6の何れか1項に記載の使い捨ておむつ。
- 前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートと、該非肌側シートと該外層シートと間に前記使い捨ておむつの横方向に伸長した状態で配され且つ該使い捨ておむつの縦方向に間欠的に配された複数の弾性部材とを有し、縦方向に隣り合う前記弾性部材どうしの間に、前記肌側シートの前記開孔が配されている請求項1~7の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、前記肌側シートと前記非肌側シートとは、接着剤を介して接着されており、前記接着剤の配された位置が、前記肌側シートの前記融着部と重なっている請求項1~8の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部は、融着している部分がフィルム化している請求項1~9の何れか1項に記載の使い捨ておむつ。
- 前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートを有し、前記肌側シートが、前記外層シートの折り返し部分で形成されている請求項1~10の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、前記開孔は、前記肌側シートの全域に間欠的に配されている請求項1~11の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部は、前記開孔を有し、かつ縦方向に沿って一列をなすように間欠的に配されており、その複数の融着部からなる融着部列が、横方向に間隔を開けて複数列配されている請求項1~12の何れか1項に記載の使い捨ておむつ。
- 縦方向に延びる前記融着部列を構成する縦方向に隣り合う前記融着部どうしの間隔は、1mm以上20mm以下である請求項13に記載の使い捨ておむつ。
- 横方向に隣り合う前記融着部列どうしの間隔は、4mm以上20mm以下である請求項13又は14に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部の内周壁における窪み部の深さをd3とした場合に、該融着部の前記内周壁から外方に前記深さd3の0.50倍離れた位置での厚みは、該窪み部を除く部分の厚みd2の、20%以上75%以下である請求項1~15の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部の内周壁から外方に前記深さd3の1.5倍離れた位置での厚みは、該窪み部を除く部分の厚みd2の、55%以上95%以下である請求項1~16の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該肌側シートの前記融着部は、該融着部の内周壁の厚みd5が、60μm以下であり、下限は10μmである請求項1~17の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートの前記開孔は、その直径L1が、0.5mm以上3mm以下である請求項1~18の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を備え、該融着部の内周壁の厚みd5は、前記開孔の直径L1の、1/10以下であり、下限は1/50である請求項1~19の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートの前記開孔は、該開孔一つの開孔面積が、0.5mm2以上5mm2以下である請求項1~20の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートの全面積に対する全体の前記開孔面積の比率は、1%以上15%以下である請求項1~21の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートの前記開孔は、前記窪み部の外周部分内の、前記肌側シートにおける前記窪み部を除く部分の厚みd2の70%以下の厚みである薄領域内に形成されており、さらに、前記薄領域内の、厚みd2の40%以下の厚みである開孔側薄領域内に形成されている請求項1~22の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートにおける前記窪み部を除く部分の厚みd2は、600μm以下であり、下限は100μmである請求項1~23の何れか1項に記載の使い捨ておむつ。
- 前記窪み部における前記開孔の外周部分の薄領域は、前記外周部分と同様に、円環状に形成されている請求項1~24の何れか1項に記載の使い捨ておむつ。
- 前記窪み部の薄領域は、その直径L2が、前記開孔の直径L1の、1.5倍以上であり、上限は3倍である請求項1~25の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、坪量が、30g/m2以下であり、9g/m2以上である請求項1~26の何れか1項に記載の使い捨ておむつ。
- 前記背側ウエストフラップ及び前記腹側ウエストフラップは、非肌側シートと外層シートとが、散点状に配置された複数の接合部にて接合固定されて形成されている請求項1~27の何れか1項に記載の使い捨ておむつ。
- 前記非肌側シートの非肌対向面側に疎水性の外層シートを有し、前記腹側領域及び前記背側領域それぞれのウエスト伸縮部から胴回り下部伸縮部に亘る領域に、前記非肌側シートと前記外層シートとの接合部が、縦方向に沿って一列をなすように間欠的に配されており、その複数の接合部からなる接合部列が、横方向に間隔を開けて複数列配されている請求項1~28の何れか1項に記載の使い捨ておむつ。
- 縦方向に延びる前記接合部列を構成する縦方向に隣り合う前記接合部どうしの間隔は、1mm以上20mm以下である請求項29に記載の使い捨ておむつ。
- 横方向に隣り合う前記接合部列どうしの間隔は、4mm以上20mm以下である請求項29又は30に記載の使い捨ておむつ。
- 前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートと、該非肌側シートと該外層シートと間に前記使い捨ておむつの横方向に伸長した状態で配され且つ該使い捨ておむつの縦方向に間欠的に配された複数の弾性部材とを備え、前記肌側シートは、各前記窪み部内に融着部を有し、
縦方向に隣り合う前記弾性部材どうしの間に、前記融着部が配されており、前記肌側シートの前記開孔が配されている請求項1~31の何れか1項に記載の使い捨ておむつ。 - 前記使い捨ておむつは、前記非肌側シートの非肌対向面側に疎水性の外層シートと、該非肌側シートと該外層シートと間に前記使い捨ておむつの横方向に伸長した状態で配され且つ該使い捨ておむつの縦方向に間欠的に配された複数の弾性部材とを備え、前記肌側シートは、各前記窪み部内に融着部を有し、
該弾性部材が収縮して形成されたギャザー部を、断面視して、前記肌側シートの非肌側に凹む凹部の深さd4の半分の位置から凸部側に、前記融着部の全体の、60%以上が配置されており、上限は100%である請求項1~32の何れか1項に記載の使い捨ておむつ。 - 前記窪み部における前記肌側シートを構成する構成繊維の繊維間距離は、前記開孔側の方が該開孔の外方側に比べて小さい請求項1~33の何れか1項に記載の使い捨ておむつ。
- 前記開孔の外周部分内の、前記窪み部を除く部分の厚みd2の70%以下の厚みである薄領域内の、厚みd2の40%以下の厚みである開孔側薄領域を構成する繊維の繊維間距離は、前記外周部分における前記窪み部の外縁近傍を構成する繊維の繊維間距離の、4/5以下である請求項1~34の何れか1項に記載の使い捨ておむつ。
- 前記開孔の外周部分内の、前記窪み部を除く部分の厚みd2の70%以下の厚みである薄領域内の、厚みd2の40%以下の厚みである開孔側薄領域を構成する肌側シートは、イオン交換水との接触角が、120°以下である請求項1~35の何れか1項に記載の使い捨ておむつ。
- 前記開孔の外周部分における前記窪み部の外縁近傍を構成する肌側シートは、イオン交換水との接触角が、120°以上である請求項1~36の何れか1項に記載の使い捨ておむつ。
- 前記肌側シートは、各前記窪み部内に該肌側シートの構成繊維どうしが融着した融着部を有し、該融着部近傍とイオン交換水との接触角と、前記開孔の外周部分における前記窪み部の外縁近傍とイオン交換水との接触角差が、10°以上である請求項1~37の何れか1項に記載の使い捨ておむつ。
- 前記非肌側シートは、その坪量が、10g/m2以上50g/m2以下である請求項1~38の何れか1項に記載の使い捨ておむつ。
- 前記非肌側シートは、その厚みが前記窪み部を除く部分において、100μm以上800μm以下である請求項1~39の何れか1項に記載の使い捨ておむつ。
- 前記非肌側シートは、その構成繊維全体に対する親水性繊維の配合率が、80質量%以上であり、下限は70質量%である請求項1~40の何れか1項に記載の使い捨ておむつ。
- 前記非肌側シートは、JIS P 8141に準じて測定された30mm幅のクレム吸水高さが、60秒で20mm以上である請求項1~41の何れか1項に記載の使い捨ておむつ。
- 前記非肌側シートは、イオン交換水の飽和吸水量が、75g/m2以上である請求項1~42の何れか1項に記載の使い捨ておむつ。
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CN112334109A (zh) * | 2018-06-29 | 2021-02-05 | 尤妮佳股份有限公司 | 内裤状吸收性制品 |
CN112334109B (zh) * | 2018-06-29 | 2022-04-19 | 尤妮佳股份有限公司 | 内裤状吸收性制品 |
US20200261281A1 (en) * | 2019-02-14 | 2020-08-20 | The Procter & Gamble Company | Pant-type wearable article |
US11617397B2 (en) | 2019-02-14 | 2023-04-04 | The Procter & Gamble Company | Pant-type wearable article |
Also Published As
Publication number | Publication date |
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CN108366886A (zh) | 2018-08-03 |
JP6208208B2 (ja) | 2017-10-04 |
RU2676993C1 (ru) | 2019-01-14 |
DE112016005877T5 (de) | 2018-08-30 |
GB2560470B (en) | 2019-04-03 |
GB201809270D0 (en) | 2018-07-25 |
GB2560470A (en) | 2018-09-12 |
CN108366886B (zh) | 2019-04-16 |
JP2017113187A (ja) | 2017-06-29 |
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