WO2017086081A1 - パンツ型使い捨ておむつ - Google Patents
パンツ型使い捨ておむつ Download PDFInfo
- Publication number
- WO2017086081A1 WO2017086081A1 PCT/JP2016/081000 JP2016081000W WO2017086081A1 WO 2017086081 A1 WO2017086081 A1 WO 2017086081A1 JP 2016081000 W JP2016081000 W JP 2016081000W WO 2017086081 A1 WO2017086081 A1 WO 2017086081A1
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- WIPO (PCT)
- Prior art keywords
- pants
- type disposable
- sheet
- disposable diaper
- exterior body
- Prior art date
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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
- A61F13/45—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
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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
-
- 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
Definitions
- the present invention relates to a pants-type disposable diaper in which a waist opening and a pair of leg openings are formed.
- an absorbent main body having a liquid-retaining absorbent body and a surface sheet arranged on the skin facing surface side of the absorbent body, and fixing the absorbent main body located on the non-skin facing surface side of the absorbent main body
- Pants having a laminated structure of an inner layer sheet bonded to the absorbent main body and an outer layer sheet bonded to a non-skin facing surface of the inner layer sheet
- the exterior body an elastic sheet having elasticity in the direction (lateral direction of the diaper) orthogonal to the front-rear direction (diaper vertical direction) of the wearer of the diaper is used from the viewpoint of improving the fit of the diaper. There is a case.
- a plurality of waistline elastic members are arranged in a laterally extended state in a portion corresponding to the waistline of the wearer between the inner layer sheet and the outer layer sheet.
- a part of the plurality of waistline elastic members is arranged so as to overlap with the longitudinal end portion of the absorbent core in a plan view.
- Patent Document 1 is mainly intended to solve the inconvenience that wrinkles are likely to occur in the absorbent core due to the adoption of the arrangement form of the waistline elastic member.
- the problem-solving means relates to the absorbent core, and does not specifically describe the breathability problem or the improvement of the surface sheet related thereto.
- corrugation was formed is used as a surface sheet in which a convex part becomes the skin side. It describes about the disposable diaper. In such a surface sheet, excretion fluid such as urine is dropped into the groove portion having a low basis weight and is quickly absorbed.
- the side portion in the convex portion has high rigidity because the fibers are densely packed, and the central portion sandwiched between the side portions in the convex portion includes many fibers oriented in the thickness direction.
- the present invention has an abdominal side portion disposed on the abdomen side of the wearer, a back side portion disposed on the back side, and a crotch portion positioned therebetween, and from the abdominal side portion to the crotch portion.
- An absorbent body having a longitudinal direction extending to the back side and a lateral direction perpendicular thereto, and having an absorbent body and a surface sheet disposed on the skin-facing surface side of the absorbent body, and the absorbent body Both sides of the exterior body on the abdominal side and the exterior body on the back side along the longitudinal direction of the exterior body.
- a pants-type disposable diaper in which edges are joined to each other to form a waist opening and a pair of leg openings.
- the exterior body includes an outer layer sheet located on a side relatively far from the absorbent main body, and an inner layer sheet located on a side relatively closer to the absorbent main body, and the ventral side part and At least one of the back side portions has a stretchable portion having stretchability in the lateral direction.
- a plurality of waistline elastic members are intermittently disposed in the longitudinal direction between the outer layer sheet and the inner layer sheet in the stretchable part in a state of being laterally extended, and one of the plurality of waistline elastic members The portion crosses the longitudinal end portion in the lateral direction through a portion overlapping the longitudinal end portion of the absorber in plan view.
- an exterior body contraction region in which the expansion / contraction part contracts in the lateral direction is formed, and on the skin facing surface side of the exterior body contraction region, a flange portion and a groove portion extending in the vertical direction
- a concavo-convex structure is formed in which are alternately arranged in the horizontal direction.
- At least one of the outer layer sheet and the inner layer sheet in the outer package shrinkage region has a through-hole penetrating in the thickness direction in the groove portion that is present outward in the longitudinal direction from the longitudinal end portion of the absorber.
- a plurality of convex portions projecting toward the wearer's skin side are formed on the skin facing surface of the topsheet, and a concave portion extending in the vertical direction is positioned between the convex portions adjacent in the lateral direction.
- a plurality of recesses are formed, and at least a part of the plurality of recesses is located at the same position in the lateral direction as the groove portion of the exterior body contraction region.
- FIG. 1 is a perspective view schematically showing an embodiment of a pants-type disposable diaper of the present invention.
- FIG. 2 is a developed plan view schematically showing the skin facing surface side (inner surface side) in the developed and extended state of the diaper shown in FIG.
- FIG. 3 is an exploded perspective view schematically showing the diaper shown in FIG. 1 in an exploded manner.
- FIG. 4 is a longitudinal sectional view schematically showing a cross section taken along line II of FIG.
- FIG. 7 is a perspective view schematically showing a longitudinal end portion of the absorbent main body in the natural state or wearing state of the diaper shown in FIG. 1 and the vicinity thereof.
- FIG. 8 is a perspective view schematically showing an exterior body contraction region in the natural state or wearing state of the diaper shown in FIG. 1.
- FIG. 9 is a plan view schematically showing the outer package of the diaper shown in FIG.
- FIG. 10 is a partially broken perspective view schematically showing an example of an outer layer sheet constituting the outer package of the diaper shown in FIG.
- excreted fluid such as urine absorbed and retained by the absorbent body evaporates from the skin facing surface side due to the body temperature of the wearer and is discharged as water vapor to the wearer's skin side.
- the inner space of the wearer that is, the skin between the wearer's skin and the diaper's skin-facing surface becomes stuffy, which may cause skin troubles such as itching and fogging.
- a pants-type disposable diaper provided with a waistline elastic member that has elasticity in the lateral direction as described in Patent Document 1, when the exterior body contracts in the lateral direction as the waistline elastic member contracts during wearing.
- the absorbent body fixed to the exterior body particularly the portion overlapping with the waistline elastic member in plan view also contracts in the lateral direction and contacts the wearer's skin, whereby the vertical transition of water vapor present in the diaper Is hindered, it becomes difficult for water vapor to be discharged out of the diaper via the waist opening, and there is a risk of causing stuffiness.
- the absorbent body may be lifted from the exterior body, and the lift of the absorbent body not only hinders the discharge of water vapor that causes stuffiness. There is also a risk of inducing excretion fluid leakage.
- the subject of the present invention relates to providing a pants-type disposable diaper that is excellent in breathability and that can effectively prevent stuffiness and skin troubles while also preventing leakage of excretory fluid.
- FIG. 1 to 7 show a schematic configuration and a configuration of a main part of a pants-type disposable diaper 1 which is an embodiment of the pants-type disposable diaper of the present invention.
- the diaper 1 has an abdominal side portion 1A disposed on the abdomen side of the wearer, a back side portion 1C disposed on the back side, and a crotch portion 1B positioned therebetween, and the crotch portion from the abdominal side portion 1A to the crotch portion. It has a vertical direction X extending to the back side portion 1C through 1B and a horizontal direction Y orthogonal thereto.
- the diaper 1 has an absorbent body 2 having an absorbent body 23 and a surface sheet 21 disposed on the skin facing surface side of the absorbent body 23, and the absorbent body 2 positioned on the non-skin facing surface side of the absorbent body 2.
- a pair of side edges along the longitudinal direction X of the exterior body 3 in the ventral side portion 1A and the exterior body 3 in the back side portion 1C are joined together.
- Side seal portions S, S, a waist opening WH through which the wearer's torso is passed, and a pair of leg openings LH, LH through which the wearer's lower limb is passed are formed.
- the “skin-facing surface” is a surface of the disposable diaper or its constituent member (for example, a surface sheet) that is directed toward the wearer's skin when the diaper is worn, that is, the side that is relatively close to the wearer's skin.
- the “non-skin-facing surface” is a surface of the disposable diaper or its constituent member that is directed to the side opposite to the skin side (clothing side) when the diaper is worn, that is, the side that is relatively far from the wearer's skin. is there.
- “at the time of wearing” here means a state in which a normal proper wearing position, that is, a correct wearing position of the disposable diaper is maintained, and does not include a case where the diaper is deviated from the wearing position. .
- the abdominal side portion 1A and the back side portion 1C are portions that are in the same position as the side seal portion S in the longitudinal direction X, and are waist portions that are arranged around the wearer's waist when the diaper 1 is worn.
- the crotch portion 1 ⁇ / b> B is a region in which recesses for forming leg openings LH and LH are formed at both side edges along the longitudinal direction X of the exterior body 3.
- the crotch part 1 ⁇ / b> B has an excretion part facing part that is disposed to face the excretion part of the wearer when the diaper 1 is worn, and the excretion part facing part is usually the central part in the longitudinal direction X of the diaper 1 or the vicinity thereof. Is located.
- the absorptive main body 2 has a rectangular shape in plan view as shown by the outline in FIG. 2, and the longitudinal direction of the absorbent main body 2 is unfolded and coincides with the longitudinal direction X of the diaper 1 in the expanded state. It is fixed at the center of the.
- the outer package 3 forms the outer shape of the diaper 1 in the unfolded and extended state of the diaper 1 as shown in FIG. 2, and the peripheral edge of the outer package 3 forms the outline of the diaper 1 in that state.
- the “expanded and extended state” of the diaper 1 means that the diaper 1 is separated by the side seal portion S to be in the expanded state, and the expanded diaper 1 is stretched by the elastic member of each part to design dimensions (the influence of the elastic member is not at all). It means a state in which it is expanded until it becomes the same size as when it is expanded in a flat state in the excluded state.
- the absorbent main body 2 includes a liquid-permeable surface sheet 21 that forms a skin-facing surface, a liquid-impermeable or liquid-permeable or water-repellent back sheet 22 that forms a non-skin-facing surface, and both sheets 21 and 22.
- a liquid-retaining absorber 23 interposed between them is provided, and these are integrated by a known joining means such as an adhesive.
- the absorber 23 is located in the center part of the horizontal direction Y of the diaper 1 (exterior body 3).
- various types conventionally used for this type of absorbent article can be used without particular limitation.
- various nonwoven fabrics or apertured films can be used as the top sheet 21, and a resin film, a laminate of a resin film and a nonwoven fabric, or the like can be used as the back sheet 22.
- the absorber 23 has a substantially rectangular shape in the longitudinal direction X in a plan view as shown in FIG. 2, and extends from the ventral portion 1A to the dorsal portion 1C.
- the absorbent body 23 includes a liquid-retaining absorbent core 24 containing an absorbent material, and a core wrap sheet 25 that covers the skin facing surface and the non-skin facing surface of the absorbent core 24.
- the absorbent core 24 and the core wrap sheet 25 are joined by a known joining means such as a hot-melt adhesive.
- the absorbent core 24 has a single layer structure, and is formed by stacking core forming materials including absorbent materials.
- the absorbent material those normally used as a material for forming this type of absorbent core can be used without any particular limitation.
- hydrophilic fibers such as wood pulp, synthetic fibers treated with a hydrophilizing agent, and water absorption Include polymer particles.
- the absorbent core 24 can be a hydrophilic fiber stack, or a structure in which water-absorbing polymer particles are supported on the stack.
- a water-permeable sheet material can be used, and for example, paper, nonwoven fabric, or the like can be used.
- the left and right side portions along the longitudinal direction X of the skin-facing surface of the absorbent main body 2 are provided with a pair of liquid-resistant or water-repellent and breathable sheet materials.
- Leakage cuffs 28, 28 are provided.
- one or more elastic members 29 for forming a leak-proof cuff are arranged in an extended state (one in this embodiment).
- the leak-proof cuff 28 stands up at least at the crotch portion 1B when the elastic member 29 arranged in the stretched state contracts when the diaper 1 is worn, and thereby the outflow of excretion fluid such as urine outward in the lateral direction Y. To prevent.
- the exterior body 3 is sandwiched between an abdominal side portion 1 ⁇ / b> A that is a waist portion of the front body, a back side portion 1 ⁇ / b> C that is a waist portion of the back body, and an abdominal side portion 1 ⁇ / b> A and a back side portion 1 ⁇ / b> C.
- 2 is disposed over the crotch 1B, and both side edges along the longitudinal direction X are curved inwardly in the crotch 1B to form a pair of leg edges, as seen in a plan view as shown in FIG.
- the central region in the vertical direction X has an hourglass shape that is bound inward in the horizontal direction Y.
- the exterior body 3 has both side edges A1, A2 along the longitudinal direction X in the ventral side 1A and both side edges C1, C2 along the longitudinal direction X in the back side 1C, adhesive, heat seal, ultrasonic seal As shown in FIG. 1, a pair of side seal portions S and S are formed in the diaper 1, and further, a waist opening WH and a pair of leg openings are joined. LH and LH are formed. Leg elastic members 4 forming leg gathers are arranged in an extended state at a portion of the exterior body 3 that forms the opening edge of the leg opening LH.
- the leg elastic member 4 has a thread shape or a belt shape, and is sandwiched and fixed by an adhesive between the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3.
- the outer package 3 includes an outer layer sheet 31 positioned on a side relatively far from the absorbent main body 2, and an inner layer sheet 32 positioned on a side relatively closer to the absorbent main body 2. It is comprised including.
- the inner layer sheet 32 is positioned on the side close to the wearer's body to form the skin facing surface (inner surface) of the diaper 1
- the outer layer sheet 31 is positioned on the side far from the wearer's body.
- the non-skin facing surface (outer surface) of the diaper 1 is formed.
- the outer layer sheet 31 and the inner layer sheet 32 are joined to each other by a known joining means such as an adhesive at a predetermined portion.
- the outer layer sheet 31 is further outward from the end in the longitudinal direction X on the ventral side 1A side of the inner layer sheet 32 when the sheets 31 and 32 are laminated.
- an abdominal extension part 31E extending outward from an end in the longitudinal direction X on the back side part 1C side of the inner layer sheet 32.
- the extending portions 31 ⁇ / b> E and 31 ⁇ / b> E of the outer layer sheet 31 respectively cover the inner layer sheet 32 so as to cover both ends in the longitudinal direction X of the absorbent main body 2 arranged and fixed on the inner layer sheet 32.
- the extending portion 31E of the outer layer sheet 31 functions as a hydrophobic sheet described later.
- the exterior body 3 has a stretchable portion having stretchability in the lateral direction Y on at least one of the ventral side portion 1A and the back side portion 1C.
- the “extractable part of the exterior body” here is a part having elasticity in the lateral direction Y in the exterior body 3, and in the present embodiment, it is located on the ventral side part 1 A and the back side part 1 C in the exterior body 3.
- the part to be stretched is the stretchable part. More specifically, in the present embodiment, the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3 are both non-stretchable sheets that do not have stretchability.
- a plurality of waistline elastic members 5 are arranged in a state of extending in the lateral direction Y between both sheets 31 and 32 in 1C, and the stretchability of the plurality of waistline elastic members 5 in the lateral direction Y is arranged.
- the “part located on the ventral side 1A in the exterior body 3” and the “part located on the back side 1C in the exterior body 3” respectively have stretchability in the lateral direction Y over the entire region, It is “stretchable part”.
- the waistline elastic member 5 is intermittently arranged in the longitudinal direction X in a state where the waistline elastic member 5 extends in the lateral direction Y, and a part of the plurality of waistline elastic members 5 is a longitudinal end portion of the absorber 23 in a plan view.
- the longitudinal end 230 is traversed in the lateral direction Y through a portion overlapping 230.
- the abdominal side portion 1A and the back side portion 1C have an absorbent main body 2 at an inner position in the longitudinal direction X from the longitudinal end 3X of the exterior body 3 (that is, the opening edge of the waist opening WH).
- the longitudinal end 2 ⁇ / b> X exists, i.e., the ventral portion 1 ⁇ / b> A and the dorsal side portion 1 ⁇ / b> C respectively have an absorbent main body non-existing region 10 located on the outermost side in the longitudinal direction X and a longitudinal direction from the region 10
- the waistline elastic member 5 is arranged in both the regions 10 and 11 when it is divided in the longitudinal direction X into the absorbent main body existence region 11 located inward of X.
- the longitudinal end portion 230 of the absorber 23 is a portion including the longitudinal end that forms part of the outline of the absorber 23 and its vicinity, and in the present embodiment, the longitudinal direction of the absorber 23. As shown in FIG. 4, the end is located at the same position in the longitudinal direction 2 ⁇ / b> X and the longitudinal end 2 ⁇ / b> X of the absorbent main body 2.
- the waist elastic member of the said expansion-contraction part ie, the part located in the abdominal side part 1A of the exterior body 3, and the back side part 1C. 5
- the exterior body contraction region 35 is the “expandable part”.
- FIG. 6 and 7 show only the ventral part 1A, the exterior contraction region 35 is formed in the dorsal part 1C as well as the ventral part 1A.
- 5 which shows the same part as FIG. 6 is a view showing a part of the diaper 1 in the expanded and extended state shown in FIG. 2, but in the form shown in FIG. 5, the exterior body 3 and the waistline elastic member 5 Is in an extended state in the lateral direction Y, the exterior body contraction region 35 is not formed.
- the exterior body contraction region 35 is formed at least in the region where the waistline elastic member 5 is disposed in each of the abdominal side portion 1A and the back side portion 1C.
- the exterior body contraction region 35 is formed in the entire area of each of the absorbent main body non-existing region 10 and the absorbent main body existing region 11 and absorbs in plan view in the absorbent main body present region 11 as shown in FIG. It is also formed on a portion overlapping the sex main body 2.
- the exterior body contraction region 35 is formed in the abdominal side part 1A and the back side part 1C.
- the exterior body 3 existing in the abdominal side part 1A and the back side part 1C that is, the “extractable part” contracts in the lateral direction Y. Then, as shown in FIG.
- FIG. 7 schematically shows the contracted state in the lateral direction Y of the extending portion 31E of the outer layer sheet 31, and the contracted state of the extending portion 31E is substantially the same as the contracted state of the exterior body 3.
- a concavo-convex structure similar to the concavo-convex structure (see FIG. 8) of the contracted exterior body 3 is formed in the extending portion 31 ⁇ / b> E, as shown in FIG. 7.
- FIG. 8 shows a part of the exterior body contraction region 35 in the natural state or wearing state of the diaper 1.
- region 35 is a collar part extended in the vertical direction X not only on the skin opposing surface, ie, the arrangement
- a concavo-convex structure in which the grooves 36 and the grooves 37 are alternately arranged in the lateral direction Y is formed.
- the ridge 36 on the skin facing surface side and the ridge 36 on the non-skin facing surface side are in the same position in the lateral direction Y, and both the groove portion 37 on the skin facing surface side and the groove portion 37 on the non-skin facing surface side are in the lateral direction. It is in the same position in Y.
- At least the exterior body 3 in the ventral side portion 1A and the back side portion 1C has an outer layer sheet 31 and an inner layer sheet 32 in both the vertical direction X and the horizontal direction Y as shown in FIGS.
- the waistline elastic members 5 are arranged so as not to pass through the exterior body joint portions 38.
- Each of the plurality of waistline elastic members 5 is joined to both sheets 31 and 32 only at both ends in the length direction, specifically, at the side seal portion S or only in the vicinity thereof. Then, it is not joined to both sheets 31 and 32.
- each of the outer layer sheet 31 and the inner layer sheet 32 includes a plurality of pieces that continuously extend in the longitudinal direction X across the plurality of waistline elastic members 5 in the natural state or wearing state of the diaper 1.
- This ridge becomes a flange portion 36 in the exterior body contraction region 35, and a space 37 between the heel and the flange becomes a groove portion 37 in the exterior body contraction region 35.
- a composite elastic member described in Japanese Patent Application Laid-Open No. 2009-118986 according to the previous application of the present applicant can be applied.
- the top sheet 21 but also the back sheet 22 and the core wrap sheet 25 are outside the longitudinal direction X from the longitudinal end of the absorbent core 24. It has an extension part extending in the direction. And the extension direction front-end
- FIG. Further, the longitudinal end of the absorbent body 23 is the longitudinal end of the core wrap sheet 25 that is located most outward in the longitudinal direction X among the constituent members of the absorbent body 23, and this is the longitudinal direction of the absorbent main body 2. Matches edge 2X.
- the waistline elastic member 5 crosses the non-arrangement region in the lateral direction Y.
- the waistline elastic member 5 contracts in the lateral direction Y in the natural state or wearing state of the diaper 1, the longitudinal end of the absorbent body 23 and the vicinity thereof are more easily contracted in the same direction.
- the exterior body contraction region 35 having an uneven structure in which the height difference between the flange portion 36 and the groove portion 37 is clearer is easily formed.
- the outer layer sheet 31 and the inner layer sheet 32 in the exterior body contraction region 35 are arranged in the longitudinal direction X from the longitudinal end 230 (the longitudinal end 2X of the absorbent main body 2) of the absorbent body 23.
- a through-hole 33 that penetrates both sheets 31 and 32 in the thickness direction is provided in the groove portion 37 existing outside.
- a plurality of through holes 33 are intermittently arranged in the longitudinal direction X at a predetermined interval in one groove portion 37.
- both the sheets 31 and 32 do not have the through-hole 33 in the collar part 36 in the exterior body shrinkage
- the through-hole 33 functions as a discharge hole for water vapor derived from excreted liquid such as urine, which causes stuffiness while the diaper 1 is worn.
- a steam discharge function of the through-hole 33 when both the outer layer sheet 31 and the inner layer sheet 32 have a plurality of through-holes 33, at least a part of both the through-holes 33 overlap each other. It is more preferable, and it is more preferable that both of the through holes 33 overlap each other in a one-to-one relationship.
- the plan view shape of the through-hole 33 is not particularly limited, and may be appropriately selected from a circular shape, a polygonal shape of a triangle or more, and the like.
- planar view shape and dimension of the through-hole 33 may be the same or different between the outer layer sheet 31 and the inner layer sheet 32.
- the degree of overlap of the two through-holes 33 does not necessarily have to be completely matched, and partially It doesn't matter if they overlap.
- the through-hole 33 penetrates the exterior body joint portion 38 that joins the outer layer sheet 31 and the inner layer sheet 32 in the thickness direction. That is, in this embodiment, both the outer layer sheet 31 and the inner layer sheet 32 have a plurality of through holes 33, and one through hole 33 of the outer layer sheet 31 and one through hole 33 of the inner layer sheet 32 are provided. It can also be said that it overlaps at the position of the outer body joint portion 38. With such a configuration, the shape retaining property of the through-hole 33 is improved, so that the steam in the diaper 1 can be more reliably discharged to the outside through the through-hole 33, and stuffiness can be effectively prevented. .
- the through-hole indicated by reference numeral 33 ′ in FIG. 4 does not overlap with the longitudinal end portion 230 of the absorber 23 in plan view among the plurality of waistline elastic members 5.
- the waist elastic member 5 ′ closest to the longitudinal end 230 of the absorbent body 23 (the longitudinal end 2X of the absorbent main body 2) and the longitudinal end 230 of the absorbent body.
- the through hole 33 ′ is arranged at such a specific position, so that it is particularly excellent in shape retention as compared with other through holes 33 arranged farther from the absorber 23 than the through hole 33 ′. Therefore, the steam discharge function can be stably exhibited while the diaper 1 is worn.
- the exterior body 3 comes into close contact with the skin due to contraction of the waistline elastic member 5 while the diaper 1 is worn.
- the through-hole 33 located at the site may be blocked by the deformation of the exterior body 3 and the ventilation may be hindered, whereas the through-hole 33 ′ is arranged closer to the absorber 23 than the close-contact site. Therefore, it is difficult to block due to the influence of the absorber 23 which is highly rigid and difficult to be deformed, and therefore, it is difficult to prevent ventilation. For this reason, the above-described stuffiness prevention effect can be further improved.
- the number of the through holes 33 ′ is one in the illustrated form, but there may be a plurality of through holes 33 ′.
- the through hole 33 ′ is the same as the through hole 33 except for the arrangement position.
- the dimensions and the like of each part are preferably set as follows.
- the maximum length of the through hole 33 in plan view is preferably 1 mm or more, more preferably 1.5 mm or more, and preferably 5 mm or less, more preferably 4 mm. It is as follows.
- the number per unit area of the through-holes 33 in the exterior body contraction region 35 is preferably 1 or more, more preferably 2 or more, based on the area of a square-shaped region 10 mm square in plan view. Preferably it is 15 or less, more preferably 12 or less.
- the portions located on the abdominal side portion 1 ⁇ / b> A and the back side portion 1 ⁇ / b> C contract in the lateral direction Y
- the exterior contraction region 35 having a concavo-convex structure including the flange portion 36 and the groove portion 37 is formed, whereas the topsheet 21 also has a corresponding concavo-convex structure on the skin facing surface.
- a plurality of convex portions 210 projecting toward the wearer's skin side are formed on the skin facing surface of the topsheet 21, and the convex portions adjacent in the lateral direction Y are formed.
- a plurality of recesses 211 extending between the portions 210 and 210 and extending in the vertical direction X are formed.
- the convex portions 210 extending in the vertical direction X and the concave portions 211 extending in the vertical direction X are alternately arranged in the horizontal direction Y, whereby the surface facing surface of the surface sheet 21 is uneven.
- a structure is formed.
- Both the convex part 210 and the concave part 211 are continuous over the entire length in the longitudinal direction X of the topsheet 21.
- the surface sheet 21 only needs to have such a concavo-convex structure formed on at least the skin facing surface, and the non-skin facing surface of the surface sheet 21 may have a concavo-convex structure formed as in the present embodiment. It may be good or not formed.
- the concavo-convex structure composed of the convex portions 210 and the concave portions 211 of the topsheet 21 is as shown in FIG. 5 when the diaper 1 is expanded and stretched, that is, when the waistline elastic member 5 in the exterior body 3 is stretched in the lateral direction Y.
- the small convex portions 210 ′ and the small concave portions 211 ′ are alternately arranged in the lateral direction Y, so that the surface sheet 21 as a whole has a wavy shape having regular irregularities, but the natural state or wearing state of the diaper 1, That is, in a state where the waistline elastic member 5 is contracted in the lateral direction Y, as shown in FIG.
- the convex portion 210 ′ and one or more small concave portions 211 ′ are combined to form one convex portion 210, and a part of the plurality of small concave portions 211 ′ is in a direction opposite to the convex portion 210 (absorber 23) and the concave portion 211 That.
- the convex part 210 of the surface sheet 21 in the diaper 1 in a natural state or a worn state is an aggregate of the small convex part 210 ′ and the small concave part 211 ′, and on the outer surface (skin facing surface) of the convex part 210, Relatively fine irregularities composed of small convex portions 210 ′ and small concave portions 211 ′ are formed. Therefore, the convex part 210 and the later-described hydrophobic sheet 31E that covers the outer surface thereof are not completely adhered, and a space part is formed between them.
- the small recessed part 211 'and the recessed part 211 are usually different in shape and / or size, they may be substantially the same.
- each of the plurality of recesses 211 on the skin facing surface of the topsheet 21 has a one-to-one correspondence with the plurality of groove portions 37 of the exterior body contraction region 35, that is, one corresponding groove portion 37.
- the horizontal direction Y With such a configuration, the air permeability of the diaper 1 is improved, and the inside of the diaper 1 is not likely to become stuffy while the diaper 1 is worn. Therefore, the occurrence of skin troubles such as itching and fogging is effectively prevented.
- the groove portion 37 of the contracted exterior body 3 (exterior body contraction region 35) is located at the same position in the lateral direction Y as the concave portion 211 of the topsheet 21.
- a “ventilation passage extending in the vertical direction X” is formed, which is composed of the concave portion 211 and the groove portion 37 that are in the same position in the horizontal direction Y. Therefore, the air permeability is enhanced, and the inside of the diaper 1 is not likely to become stuffy during wearing.
- excretion fluid such as urine and sweat absorbed and held in the absorbent body 23 (absorbent core 24) of the absorbent main body 2 evaporates due to the body temperature of the wearer, and becomes water vapor from the top sheet 21. Even if it is discharged to the skin side of the wearer, the water vapor is discharged from the waist opening WH to the outside of the diaper 1 through the concave portion 211 and the groove portion 37 or from the through-hole 33 provided in the groove portion 37 in the middle thereof. Since it is discharged to the outside of the diaper 1, the diaper 1 is less likely to cause stuffiness while being worn, and it is difficult to cause skin problems for the wearer.
- corrugated pitch) of the convex part 210 and the recessed part 211 in the surface sheet 21 is small compared with the space
- the groove portion 37 having a large length or width in the lateral direction Y is always present at the same position in the lateral direction Y as the recess portion 211 having a relatively short length or width in the lateral direction Y, but the reverse relationship does not necessarily hold. At least some of the plurality of recesses 211 remain in the same position as the groove 37 in the lateral direction Y. Specifically, it is preferable that one of the three concave portions 211 is located at the same position as the groove portion 37.
- the concave portion 211 of the topsheet 21 is present at the same position in the lateral direction Y as the groove portion 37 of the exterior body contracting region 35 (exterior body 3)” means that the concave portion 211 is bisected in the lateral direction Y.
- the waistline elastic member 5 passes through the part which overlaps with the vertical direction edge part 230 of the absorber 23 in planar view, this is crossed to the horizontal direction Y, Therefore
- the absorbent body 23 that is, the absorbent main body 2 is difficult to lift from the external body 3, thereby improving air permeability, preventing stuffiness and preventing liquid leakage. It is illustrated.
- the absorbent main body 2 comes into contact with the wearer's skin by contracting in the lateral direction Y, or the absorbent main body 2 comes up from the exterior body 3 and comes into contact with the wearer's skin.
- the uneven structure which consists of the convex part 210 and the recessed part 211 is formed in the skin opposing surface of the surface sheet 21 which is a contact surface with the skin, the skin opposing surface of the surface sheet 21 and a wearer's skin Does not adhere to the entire surface without any gaps, thereby improving air permeability and preventing stuffiness.
- the skin-facing surface of the top sheet is a flat surface without an uneven structure, the flat surface may be in close contact with the wearer's skin without any gaps, and stuffiness may not be prevented.
- the distance between the tops of the convex portions 210, 210 adjacent in the lateral direction Y is preferably 1.5 mm. More preferably, it is 2 mm or more, preferably 5 mm or less, more preferably 4.5 mm or less.
- the separation distance in the horizontal direction Y of the top portion of the convex portion 210 is closely related to the length or width of the concave portion 211 in the horizontal direction Y.
- the length in the longitudinal direction X of the recess 211 is preferably 7 mm or more, more preferably 10 mm or more, and preferably 60 mm or less, more preferably 50 mm or less.
- the number of the concave portions 211 of the surface sheet 21 at the longitudinal end 2X position of the absorbent main body 2 is preferably 15 or more, more preferably 20 or more, and preferably 50.
- the number is not more than 40, more preferably not more than 40.
- the number of waist elastic members 5 existing in the ventral side 1A or the back side 1C is preferably 10 or more, more preferably 12 or more, and preferably 35 or less, more preferably 30 or less.
- the number of waist elastic members 5 that cross the absorbent body 23 in the lateral direction Y through a portion overlapping the absorbent body 23 in a plan view is preferably one or more, and Preferably it is 15 or less, more preferably 12 or less.
- the topsheet 21 has an exterior body contraction region 35 (absorbent body non-existing region 10 and absorbent body existing region 11) in plan view. And the skin facing surface of the topsheet 21 is covered with the hydrophobic sheet 31E in the exterior body contraction region 35.
- the hydrophobic sheet 31E in the present embodiment is the extending portion 31E that is a part of the outer layer sheet 31.
- Hydrophobic sheet 31E can remove the adverse effects caused by the concavo-convex structure on the skin-facing surface of surface sheet 21, which is mainly employed from the viewpoint of improving air permeability. That is, if the concave portion 211 extending in the vertical direction X is formed on the skin facing surface of the topsheet 21, it is effective in terms of air permeability, but the concave portion 211 not only serves as a water vapor conduction path but also excretes urine and the like. Since there is a possibility of functioning as a liquid conduction path, the excretion liquid may leak to the outside through the recess 211, and there is a concern about liquid leakage. In contrast, as shown in FIGS.
- the hydrophobic sheet 31 ⁇ / b> E is bonded to the top sheet 21 at the bonding portion 6 at the top of the protrusion 210, more preferably at the top of the protrusion 210, and is not bonded at the recess 211.
- the hydrophobic sheet 31E and the surface sheet 21 can be joined by a known joining means such as a hot-melt adhesive.
- the joining part 6 is an adhesive application part.
- the joint 6 between the hydrophobic sheet 31 ⁇ / b> E and the top sheet 21 is intermittently arranged in the vertical direction X. More specifically, as shown in FIG. 5, the joining portion 6 has a linear shape extending in the lateral direction Y in a plan view, which is continuous over the entire length in the lateral direction Y of the overlapping portion of the hydrophobic sheet 31 ⁇ / b> E and the top sheet 21. However, a plurality (three in FIG. 4) of linear joints 6 are formed at predetermined intervals in the vertical direction X.
- the joint portion 6 itself has an effect of blocking the excretion fluid such as urine, and the joint portion 6 having such a function is arranged in this manner, so that the hydrophobic sheet 31E is used. Combined with the liquid leakage prevention effect, the liquid leakage can be prevented more effectively.
- seat 31E is not joined to the surface sheet 21, but is a free edge part.
- whether the sheet or a partial area thereof is hydrophilic or hydrophobic is determined based on the contact angle of the fiber measured by the following method. Specifically, if the contact angle of the fiber is less than 90 degrees, it is hydrophilic, and if it is 90 degrees or more, it is hydrophobic. The smaller the contact angle of the fiber measured by the following method, the higher the hydrophilicity (lower hydrophobicity), and the higher the contact angle, the lower the hydrophilicity (higher hydrophobicity).
- the hydrophobic sheet 31E in the present embodiment has a fiber contact angle of 90 degrees or more as measured over the entire area by the following method.
- ⁇ Measurement method of contact angle> Set so that the cross-section along the thickness direction of the sheet (nonwoven fabric) to be measured is the top surface, and randomly sample multiple fibers in the section from the outermost surface of the sheet to 1/10 of the thickness in the sheet thickness direction. Measure the contact angle.
- an automatic contact angle meter MCA-J manufactured by Kyowa Interface Science Co., Ltd. is used as a measuring device. Distilled water is used to measure the contact angle.
- the amount of liquid ejected from an ink jet type water droplet ejection unit manufactured by Cluster Technology, Inc., pulse injector CTC-25 with a pore size of 25 ⁇ m
- the water droplets are directly above the center of each fiber.
- the state of dripping is recorded on a high-speed recording device connected to a horizontally installed camera.
- the recording device is preferably a personal computer incorporating a high-speed capture device from the viewpoint of image analysis later.
- an image is recorded every 17 msec.
- the first image of water droplets on the fiber is attached to the attached software FAMAS (software version is 2.6.2, analysis method is droplet method, analysis method is ⁇ / 2 method, image processing algorithm Is non-reflective, the image processing image mode is frame, the threshold level is 200, and the curvature is not corrected)), and the angle between the surface of the water droplet that touches the air and the fiber is calculated and contacted. A corner.
- the fiber is cut into a fiber length of about 1 mm, and the fiber is placed on a sample table of a contact angle meter and kept horizontal.
- N 5 contact angles are measured to one decimal place, and a value obtained by averaging a total of 10 measured values (rounded to the first decimal place) is defined as the contact angle.
- a lower contact angle means higher hydrophilicity.
- the measurement environment is a room temperature of 22 ⁇ 2 ° C. and a humidity of 65 ⁇ 2% RH.
- the hydrophobic sheet 31E in this embodiment is a part of the outer layer sheet 31, the hydrophobic sheet according to the present invention is not limited to this, and the hydrophobic sheet is separate from the other components of the diaper 1. It may be a sheet.
- a nonwoven fabric having elasticity in the transverse direction Y is preferably used.
- the “elastic sheet” is a sheet having elasticity in a predetermined direction (for example, the horizontal direction), and more specifically, the maximum elongation in the predetermined direction (for example, the horizontal direction) is 100%.
- the sheet has an elongation recovery rate (elongation recovery rate at 100% elongation) of at least 70% when the sheet is stretched in the predetermined direction to 100% elongation and then contracted.
- the hydrophobic sheet 31E having elasticity in the horizontal direction Y can be expanded in the horizontal direction Y larger than the vertical direction X. More specifically, the outer layer sheet 31 greatly expands in the lateral direction Y and contracts after expansion (maximum elongation of 100% or more and elongation recovery rate of 70% or more), but slightly in the longitudinal direction X. Does not stretch (for example, maximum elongation of 50% or less).
- the elongation recovery rate of the sheet is measured by the following measuring method.
- a sample piece having a length of 50 mm and a width of 25 mm is prepared from the sheet to be measured.
- a sample piece is fixed between the chucks (chuck interval K0) of a tensile tester (Orientec Co., Ltd. “Tensilon” RTC-1150A), and the sample piece is pulled by expanding the gap between the chucks at a tensile speed of 300 mm / min.
- the gap between the chucks is narrowed at the same speed as the tensile speed, and the length of the sample piece when the tensile stress becomes zero is obtained.
- the length is K1 after recovery from elongation.
- Examples of the stretchable hydrophobic sheet 31E include (1) a stretchable sheet in which stretchable fiber layers are integrated on both sides or one side of the elastic fiber layer, and (2) on both sides or one side of the net-like elastic sheet.
- An elastic sheet in which stretchable fiber layers are integrated (3) an elastic sheet in which elastic fiber layers are integrated on both sides or one side of an elastic sheet made of an elastic film, and (4) cross each other
- a stretchable sheet or the like in which a large number of elastic filaments arranged so as to extend in one direction without being stretched are joined to a stretchable nonwoven fabric over their entire length in a substantially non-stretched state can be preferably used.
- Examples of the method of integrating the elastic fiber layer and the extensible fiber layer include, for example, laminating them and hydroentangled them, or entangled fibers by air-through, etc., heat embossing, adhesive, ultrasonic bonding, etc. The method of letting it be mentioned.
- FIG. 10 shows a preferred example of the stretchable hydrophobic sheet 31E.
- a hydrophobic sheet 31E shown in FIG. 10 corresponds to the stretchable sheet of (4) above, and has a configuration in which a thread-like elastic filament is joined to one surface of an extensible fiber layer mainly composed of non-elastic fibers.
- the two fiber sheets 310 and 311 as the fiber layer and the elastic member 312 as the elastic filament disposed between the sheets 310 and 311 are included.
- the stretchable hydrophobic sheet 31E having such a configuration can be manufactured, for example, according to the method described in JP-A-2009-61743.
- the two sheets 310 and 311 constituting the stretchable hydrophobic sheet 31E are both extensible.
- the sheets 310 and 311 can extend in the same direction as the direction in which the elastic member 312 extends (lateral direction Y).
- Stretchable means (a) when the constituent fibers themselves of the sheets 310 and 311 are stretched, and (b) even if the constituent fibers themselves are not stretched, the fibers that are bonded at the intersection are separated, This includes the case where the three-dimensional structure formed by a plurality of fibers is structurally changed due to bonding or the like, or the constituent fibers are broken, and the sheets 310 and 311 are stretched as a whole.
- the elastic member 312 constituting the stretchable hydrophobic sheet 31E is an elastic filament formed by being stretched in a state where the elastic resin is melted or softened.
- Each of the plurality of elastic members 312 is substantially continuous over the entire length of the sheet 31E (the total length in the lateral direction Y of the exterior body 3).
- the plurality of elastic members 312 are arranged so as to extend in one direction (lateral direction Y) without crossing each other.
- the elastic member 312 is joined to the two sheets 310 and 311 in a substantially non-extended state.
- the elastic member 312 is joined to the sheets 310 and 311 by fusing the elastic members 312 with the fibers (non-elastic fibers) constituting the sheets 310 and 311 in a state of being embedded in the elastic members 312.
- it is not made using an adhesive such as a hot-melt adhesive. Therefore, there is no adhesive between the sheets 310 and 311 (extensible fiber layer mainly composed of non-elastic fibers) and the elastic member 312 bonded thereto.
- the stretchable hydrophobic sheet 31E is stretchable in the same direction as the direction in which the elastic member 312 extends (lateral direction Y).
- the stretchability of the sheet 31E appears due to the elasticity of the elastic member 312.
- the elastic member 312 and the sheets 310 and 311 extend.
- the elastic member 312 contracts, and the sheets 310 and 311 return to the state before the stretching with the contraction.
- the sheet 31E there is no other elastic member coupled in a state orthogonal to the elastic member 312. Therefore, the sheet 31E is stretched in the same direction as the direction in which the elastic member 312 extends (lateral direction Y).
- the sheet 31E expands with almost no so-called width shrinkage shrinking in the lateral direction Y.
- the two sheets 310 and 311 constituting the stretchable hydrophobic sheet 31E can each be a nonwoven fabric of short fibers.
- the nonwoven fabric include air-through nonwoven fabric, heat roll nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and meltblown nonwoven fabric.
- the sheet 310 and the sheet 311 may be the same type or different types.
- the “same type of sheet” means sheets having the same manufacturing process, types of constituent fibers of the sheet, fiber diameters and lengths of the constituent fibers, sheet thickness, basis weight, and the like. . If at least one of these is different, it is a “dissimilar sheet”.
- the elastic member 312 (elastic filament) constituting the stretchable hydrophobic sheet 31E is made of, for example, a thermoplastic elastomer or rubber.
- a thermoplastic elastomer is used as a raw material, melt spinning using an extruder is possible in the same way as a normal thermoplastic resin, and the elastic filament thus obtained is easily heat-sealed, so that the sheet 31E It is suitable for.
- thermoplastic elastomer examples include styrene such as SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene).
- SBS styrene-butadiene-styrene
- SIS styrene-isoprene-styrene
- SEBS styrene-ethylene-butadiene-styrene
- SEPS styrene-ethylene-propylene-styrene
- olefin-based elastomers ethylene-based ⁇ -olefin elastomers, propylene-based elastomers copolymerized with ethylene, butene, octene, etc.
- polyester-based elastomers polyurethane-based elastomers, and the like.
- Two or more kinds can be used in combination.
- core-sheath type or side-by-side type composite fibers made of these resins can also be used.
- the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3 are both non-stretchable sheets having no stretchability.
- the “non-stretchable sheet” is a sheet having an elongation recovery rate measured by the above ⁇ Method for measuring elongation recovery rate> of 20% or less, or a sheet that breaks before 100% elongation.
- nonwoven fabrics produced by various production methods are preferably used, such as spunbond nonwoven fabric, air-through nonwoven fabric, and needle punched nonwoven fabric.
- the constituent fibers of the nonwoven fabric used as the non-stretchable sheets 31 and 32 include fibers made of polyester, polyamide, etc., such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). Etc.
- the fibers constituting the nonwoven fabric used as the non-stretchable sheets 31 and 32 may be short fibers or long fibers, and may be hydrophilic or hydrophobic.
- a core-sheath type or side-by-side type composite fiber a split fiber, a modified cross-section fiber, a crimped fiber, a heat-shrinkable fiber, or the like can also be used. These fibers can be used alone or in combination of two or more.
- the convex part 210 and the recessed part 211 which comprise the uneven
- the surface sheet 21 overlaps with the vertical direction edge part 230 of the absorber 23 which exists in the exterior body contraction area
- the sheet 31E such a configuration is not essential in the present invention.
- the skin-facing surface of the concavo-convex structure of the topsheet 21 is covered with the hydrophobic sheet 31E, so that excretory fluid such as urine passes through the recess 211 that forms the concavo-convex structure. The inconvenience of leaking to the outside is more effectively prevented.
- seat 31 was comprised from one continuous sheet
- the exterior body 3 is divided
- the absorptive main body 2 is the said exterior body ventral region, It may be bridged and fixed to the exterior body back side field.
- the ventral portion disposed on the abdomen side of the wearer, the dorsal side portion disposed on the dorsal side, and a crotch portion positioned therebetween, and the dorsal side from the abdominal side portion through the crotch portion
- An absorbent body having a longitudinal direction extending to a portion and a lateral direction perpendicular thereto, and having an absorbent body and a surface sheet disposed on the skin facing surface side of the absorbent body, and the non-skin facing of the absorbent body
- An exterior body located on the surface side and fixing the absorbent main body, and both side edges along the longitudinal direction of the exterior body on the abdominal side and the exterior body on the back side
- a pants-type disposable diaper that is joined to form a waist opening and a pair of leg openings
- the exterior body includes an outer layer sheet located on a side relatively far from the absorbent main body, and an inner layer sheet located on a side relatively closer to the absorbent main body, and the ventral side part and At least one of the do
- the pants-type disposable diaper according to ⁇ 1> wherein the top sheet overlaps with a longitudinal end portion of the absorbent body existing in the exterior body contraction region in a plan view.
- the absorbent body has an absorbent core containing an absorbent material, and the topsheet has a portion extending outward in the longitudinal direction from the longitudinal end portion of the absorbent core, and the surface thereof in plan view.
- the through-hole is not overlapped with the longitudinal end of the absorber in a plan view among the plurality of waistline elastic members and is closest to the longitudinal end of the absorber; and
- ⁇ 5> The pants-type disposable according to any one of ⁇ 1> to ⁇ 4>, wherein both the outer layer sheet and the inner layer sheet have a plurality of the through holes, and at least a part of both through holes overlap each other. Diapers.
- the outer layer sheet and the inner layer sheet are joined to each other at a plurality of exterior body joint portions arranged intermittently in both the longitudinal direction and the lateral direction, and the waistline elastic member is The pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 5>, wherein the pants-type disposable diaper is arranged so as not to pass through the body joint.
- the outer layer sheet and the inner layer sheet are joined to each other at a plurality of exterior body joint portions that are intermittently arranged in both the longitudinal direction and the lateral direction, and the through hole is formed of the exterior body.
- the pants-type disposable diaper according to the above ⁇ 5> or ⁇ 6> which penetrates the joint in the thickness direction.
- the outer layer sheet further extends from the longitudinal end on the ventral side of the inner layer sheet when the two sheets are laminated. Any one of ⁇ 1> to ⁇ 7>, further including a side extending portion and a back side extending portion extending outward from a longitudinal end portion on the back side portion side of the inner layer sheet.
- the skin facing surface of the topsheet is covered with a hydrophobic sheet in the exterior body contraction region,
- ⁇ 11> The pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 9>, wherein a skin-facing surface of the topsheet is covered with a hydrophobic sheet in the shrinkage region of the exterior body.
- ⁇ 12> The pants-type disposable diaper according to ⁇ 10> or ⁇ 11>, wherein the hydrophobic sheet is bonded to the topsheet at the convex portion and is not bonded at the concave portion.
- seat and the said surface sheet is an underpants type disposable diaper as described in said ⁇ 12> arrange
- ⁇ 14> The pants type according to any one of ⁇ 10> to ⁇ 13>, wherein an end portion on the inner side in the longitudinal direction of the hydrophobic sheet is not joined to the topsheet and is a free end portion.
- Disposable diapers ⁇ 15> The pants-type disposable diaper according to any one of the above ⁇ 10> to ⁇ 14>, wherein the hydrophobic sheet is made of a nonwoven fabric having elasticity in the lateral direction.
- ⁇ 16> The pants-type disposable diaper according to any one of ⁇ 10> to ⁇ 15>, wherein the hydrophobic sheet is bonded to the top sheet and the top of the convex portion and is not bonded to the concave portion.
- the ventral side portion and the dorsal side portion are each in the longitudinal direction, the absorbent main body non-existing region where the absorbent main body is not disposed, and the absorptive located inward in the vertical direction from the absorbent main body non-existing region
- the pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 16>, wherein the pants-type disposable diaper is divided into main body existence regions and the waistline elastic members are arranged in both regions.
- the exterior body contraction region is formed in the entire region of the absorbent main body non-existing region and the absorbent main body existing region, and is also formed in a portion overlapping the absorbent main body in plan view in the absorbent main body existing region.
- each of the plurality of waistline elastic members includes the side Any one of the above items ⁇ 1> to ⁇ 20>, which is bonded to both the outer layer sheet and the inner layer sheet only at a seal portion or a portion located in the vicinity thereof, and is not bonded to both sheets at other portions.
- the pants-type disposable diaper according to one item.
- Each of the outer layer sheet and the inner layer sheet in a natural state or in a worn state, forms a plurality of ridges extending continuously in the longitudinal direction across the plurality of waistline elastic members, and the ridges serve as the heel portion,
- the pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 21>, wherein a space is formed between the heels adjacent to each other in the lateral direction.
- the number per unit area of the through holes in the exterior body contraction region is preferably 1 or more, more preferably 2 or more, based on the area of a square-shaped region 10 mm square in plan view, and
- the pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 26>, wherein the number is preferably 15 or less, and more preferably 12 or less.
- ⁇ 28> Any one of the above ⁇ 1> to ⁇ 27>, in which at least a part of the plurality of recesses of the surface sheet has the groove portion of the exterior body contraction region on the longitudinal extension line of the recess.
- Each of the plurality of recesses on the skin facing surface of the top sheet has a one-to-one correspondence with the plurality of grooves in the exterior body contraction region, and is located at the same position in the lateral direction as the corresponding one of the grooves.
- the underpants-type disposable diaper according to any one of ⁇ 1> to ⁇ 28>.
- the separation distance between the tops of the convex portions adjacent in the lateral direction is preferably 1.5 mm or more, more preferably 2 mm or more, and preferably 5 mm or less, more preferably 4
- the underpants-type disposable diaper according to any one of ⁇ 1> to ⁇ 29>, which is 5 mm or less.
- the length in the longitudinal direction of the recess is preferably 7 mm or more, more preferably 10 mm or more, and preferably 60 mm or less, more preferably 50 mm or less, according to any one of the above items ⁇ 1> to ⁇ 30>.
- Pants-type disposable diaper is preferably 7 mm or more, more preferably 10 mm or more, and preferably 60 mm or less, more preferably 50 mm or less, according to any one of the above items ⁇ 1> to ⁇ 30>.
- the number of waist elastic members existing in the ventral part or the dorsal part is preferably 10 or more, more preferably 12 or more, and preferably 35 or less, more preferably 30 or less.
- the number of the waistline elastic members that cross the absorber laterally through a portion overlapping the absorber in a plan view is preferably one or more, and preferably The pants-type disposable diaper according to any one of ⁇ 1> to ⁇ 32>, wherein the number is 15 or less, more preferably 12 or less.
- a pants-type disposable diaper that is excellent in breathability and that can effectively prevent stuffiness and skin troubles while also preventing leakage of excretory fluid.
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Abstract
Description
吸収体及び該吸収体の肌対向面側に配された表面シートを有する吸収性本体と、該吸収性本体の非肌対向面側に位置して該吸収性本体を固定している外装体とを有し、前記腹側部における該外装体及び前記背側部における該外装体それぞれの縦方向に沿う両側縁部どうしが接合されてウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつである。
前記外装体は、前記吸収性本体から相対的に遠い側に位置する外層シートと、該吸収性本体から相対的に近い側に位置する内層シートとを含んで構成され、且つ前記腹側部及び前記背側部の少なくとも一方に、横方向に伸縮性を有する伸縮部を有している。
前記伸縮部における前記外層シートと前記内層シートとの間に、複数の胴回り弾性部材が横方向に伸長した状態で縦方向に間欠的に配されており、それら複数の胴回り弾性部材のうちの一部は、平面視において前記吸収体の縦方向端部と重なる部分を通って該縦方向端部を横方向に横断している。
前記伸縮部の前記胴回り弾性部材の収縮により、該伸縮部が横方向に収縮した外装体収縮領域が形成され、該外装体収縮領域の肌対向面側に、縦方向に延びる畝部と溝部とが横方向に交互に配された凹凸構造が形成されている。
前記外装体収縮領域における前記外層シート及び前記内層シートの少なくとも一方は、前記吸収体の縦方向端部より縦方向外方に存する前記溝部に、厚み方向に貫通する貫通孔を有している。
前記表面シートの肌対向面に、着用者の肌側に向かって突出する凸部が複数形成されていると共に、横方向において隣り合う該凸部どうしの間に位置して縦方向に延びる凹部が複数形成されており、複数の該凹部の少なくとも一部は、前記外装体収縮領域の前記溝部と横方向において同位置に存している。
即ち、図4に示すように、表面シート21は、吸収性コア24の縦方向端部より縦方向Xの外方に延出する延出部21Eを有し、図2に示す如き平面視においてその延出部21Eと胴回り弾性部材5とが重なっている。より具体的には、本実施形態においては図4に示すように、表面シート21のみならず、裏面シート22及びコアラップシート25も、吸収性コア24の縦方向端部より縦方向Xの外方に延出する延出部を有している。そして、それら各シート21,22,25の延出部の延出方向先端は縦方向Xにおいて互いに同位置にあり、吸収性本体2の縦方向端2Xを形成している。また、吸収体23の縦方向端は、吸収体23の構成部材のうちで最も縦方向Xの外方に位置するコアラップシート25の縦方向端であり、これは吸収性本体2の縦方向端2Xに一致する。つまり、吸収体23における縦方向端及びその近傍(吸収性本体2における縦方向端2X及びその近傍)には、剛性の高い吸収性コア24が配されていない領域があるところ、その吸収性コア非配置領域を胴回り弾性部材5が横方向Yに横断している。斯かる構成により、吸収体23における縦方向端及びその近傍は、おむつ1の自然状態又は着用状態において胴回り弾性部材5が横方向Yに収縮したときに、同方向により一層収縮しやすくなるため、吸収体23の縦方向端部230の配置領域及びその近傍に、畝部36及び溝部37の高低差がよりはっきりした凹凸構造を有する外装体収縮領域35が形成されやすくなる。そして、そのような凹凸構造の高低差が明確な外装体収縮領域35の形成は、後述する表面シート21の肌対向面の凸部210及び凹部211からなる凹凸構造と相俟って、おむつ1の通気性の一層の向上に寄与し得る。
貫通孔33の平面視における最大長さ(貫通孔33が平面視円形状の場合は直径)は、好ましくは1mm以上、さらに好ましくは1.5mm以上、そして、好ましくは5mm以下、さらに好ましくは4mm以下である。
外装体収縮領域35における貫通孔33の単位面積当たりの数は、平面視10mm四方の正方形形状の領域の面積を基準とした場合に、好ましくは1個以上、さらに好ましくは2個以上、そして、好ましくは15個以下、さらに好ましくは12個以下である。
表面シート21の肌対向面において、横方向Yにおいて隣り合う凸部210,210それぞれの頂部(凸部において最も着用者の肌側に突出している部分)間の離間距離は、好ましくは1.5mm以上、さらに好ましくは2mm以上、そして、好ましくは5mm以下、さらに好ましくは4.5mm以下である。斯かる凸部210の頂部の横方向Yにおける離間距離は、凹部211の横方向Yの長さ即ち幅に密接に関係するものである。
凹部211の縦方向Xの長さは、好ましくは7mm以上、さらに好ましくは10mm以上、そして、好ましくは60mm以下、さらに好ましくは50mm以下である。
おむつ1の自然状態又は着用状態において、吸収性本体2の縦方向端2X位置での表面シート21の凹部211の数は、好ましくは15本以上、さらに好ましくは20本以上、そして、好ましくは50本以下、さらに好ましくは40本以下である。
腹側部1A又は背側部1Cにおいて、平面視において吸収体23と重なる部分を通って該吸収体23を横方向Yに横断する胴回り弾性部材5の数は、好ましくは1本以上、そして、好ましくは15本以下、さらに好ましくは12本以下である。
測定対象のシート(不織布)の厚み方向に沿う断面が上面となるようにセットし、シートの厚み方向へシートの最表面から厚みの1/10までの区間の繊維をランダムに複数サンプリングし、水の接触角を測定する。測定装置として、協和界面科学株式会社製の自動接触角計MCA-Jを用いる。接触角の測定には蒸留水を用いる。インクジェット方式水滴吐出部(クラスターテクノロジー社製、吐出部孔径が25μmのパルスインジェクターCTC-25)から吐出される液量を15ピコリットルに設定して、水滴を、それぞれの繊維の中央の真上に滴下する。滴下の様子を水平に設置されたカメラに接続された高速度録画装置に録画する。録画装置は後に画像解析をする観点から、高速度キャプチャー装置が組み込まれたパーソナルコンピュータが望ましい。本測定では、17msecごとに画像が録画される。録画された映像において、繊維に水滴が着滴した最初の画像を、付属ソフトFAMAS(ソフトのバージョンは2.6.2、解析手法は液滴法、解析方法はθ/2法、画像処理アルゴリズムは無反射、画像処理イメージモードはフレーム、スレッシホールドレベルは200、曲率補正はしない、とする)にて画像解析を行い、水滴の空気に触れる面と繊維とのなす角を算出し、接触角とする。繊維は、繊維長1mm程度に裁断し、該繊維を接触角計のサンプル台に載せて、水平に維持する。N=5本の接触角を小数点以下1桁まで計測し、合計10箇所の測定値を平均した値(小数点以下第1桁で四捨五入)を接触角と定義する。接触角の低いものほど親水性が高いことを意味する。測定環境は、室温22±2℃、湿度65±2%RHとする。
測定対象のシートから長さ50mm、幅25mmのサンプル片を用意する。引張試験機(株式会社オリエンテックの「テンシロン」RTC-1150A)のチャック間(チャック間隔K0)にサンプル片を固定し、引張速度300mm/minでチャック間を拡げることでサンプル片を引っ張り、サンプル片の100%伸長時の長さK2(=K0×2)まで伸長させた後、引張速度と同速度でチャック間を狭めていき、引張応力が0になった時点でのサンプル片の長さを伸長回復後の長さK1とする。次式により、測定対象のシートの100%伸長時の伸長回復率を算出する。
100%伸長時の伸長回復率(%)=〔(K2-K1)/(K2-K0)〕×100
例えば、前記実施形態では、表面シート21の肌対向面の凹凸構造を構成する凸部210及び凹部211は、表面シート21の縦方向Xの全長に亘って連続して畝溝構造をなしていたが、要は、横方向Yにおいて隣り合う凸部210,210どうしの間に位置して縦方向Xに延びる凹部211が複数形成されていれば良く、そのような畝溝構造に限定されない。
また前記実施形態では、表面シート21は、平面視において外装体収縮領域35に存する吸収体23の縦方向端部230と重なり、且つ外装体収縮領域35において表面シート21の肌対向面が疎水性シート31Eで被覆されていたが、本発明においては斯かる構成は必須ではない。しかしながら前述した通り、斯かる構成により、特に表面シート21の凹凸構造の肌対向面が疎水性シート31Eで被覆されることにより、尿などの***液がその凹凸構造を形成する凹部211を通って外部に漏れ出す不都合がより一層効果的に防止されるようになる。
また前記実施形態では、外層シート31は内層シート32と同様に1枚の連続したシートから構成されていたが、複数枚のシートが組み合わされて構成されていても良い。
また、外装体3は、腹側部に位置する外装体腹側領域及び背側部に位置する外装体背側領域とに分割されており、吸収性本体2は、前記外装体腹側領域及び前記外装体背側領域に架け渡して固定されていても良い。
前述した本発明の実施形態に関し、更に以下の付記を開示する。
着用者の腹側に配される腹側部及び背側に配される背側部とそれらの間に位置する股下部とを有すると共に、該腹側部から該股下部を介して該背側部に延びる縦方向とこれに直交する横方向とを有し、且つ
吸収体及び該吸収体の肌対向面側に配された表面シートを有する吸収性本体と、該吸収性本体の非肌対向面側に位置して該吸収性本体を固定している外装体とを有し、前記腹側部における該外装体及び前記背側部における該外装体それぞれの縦方向に沿う両側縁部どうしが接合されてウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、
前記外装体は、前記吸収性本体から相対的に遠い側に位置する外層シートと、該吸収性本体から相対的に近い側に位置する内層シートとを含んで構成され、且つ前記腹側部及び前記背側部の少なくとも一方に、横方向に伸縮性を有する伸縮部を有し、
前記伸縮部における前記外層シートと前記内層シートとの間に、複数の胴回り弾性部材が横方向に伸長した状態で縦方向に間欠的に配されており、それら複数の胴回り弾性部材のうちの一部は、平面視において前記吸収体の縦方向端部と重なる部分を通って該縦方向端部を横方向に横断しており、
前記伸縮部の前記胴回り弾性部材の収縮により、該伸縮部が横方向に収縮した外装体収縮領域が形成され、該外装体収縮領域の肌対向面側に、縦方向に延びる畝部と溝部とが横方向に交互に配された凹凸構造が形成されており、
前記外装体収縮領域における前記外層シート及び前記内層シートの少なくとも一方は、前記吸収体の縦方向端部より縦方向外方に存する前記溝部に、厚み方向に貫通する貫通孔を有しており、
前記表面シートの肌対向面に、着用者の肌側に向かって突出する凸部が複数形成されていると共に、横方向において隣り合う該凸部どうしの間に位置して縦方向に延びる凹部が複数形成されており、複数の該凹部の少なくとも一部は、前記外装体収縮領域の前記溝部と横方向において同位置に存しているパンツ型使い捨ておむつ。
前記表面シートは、平面視において前記外装体収縮領域に存する前記吸収体の縦方向端部と重なる前記<1>に記載のパンツ型使い捨ておむつ。
<3>
前記吸収体は、吸収性材料を含む吸収性コアを有し、前記表面シートは、該吸収性コアの縦方向端部より縦方向外方に延出する部分を有し、平面視においてその表面シートの延出部と前記胴回り弾性部材とが重なる前記<1>又は<2>に記載のパンツ型使い捨ておむつ。
<4>
前記貫通孔は、複数の前記胴回り弾性部材のうちで平面視において前記吸収体の縦方向端部と重ならず且つ該吸収体の縦方向端部に最も近接する弾性部材と、該吸収体の縦方向端部との間に存している前記<1>~<3>の何れか一項に記載のパンツ型使い捨ておむつ。
<5>
前記外層シート及び前記内層シートの双方が前記貫通孔を複数有し、双方の貫通孔の少なくとも一部どうしが重なっている前記<1>~<4>の何れか一項に記載のパンツ型使い捨ておむつ。
<6>
前記外装体収縮領域において、前記外層シート及び前記内層シートは、縦方向及び横方向の両方向において間欠的に配置された複数の外装体接合部にて互いに接合され、前記胴回り弾性部材は、該外装体接合部を通らないように配されている前記<1>~<5>の何れか一項に記載のパンツ型使い捨ておむつ。
<7>
前記外装体収縮領域において、前記外層シート及び前記内層シートは、縦方向及び横方向の両方向において間欠的に配置された複数の外装体接合部にて互いに接合され、前記貫通孔は、該外装体接合部を厚み方向に貫通している前記<5>又は<6>に記載のパンツ型使い捨ておむつ。
前記外層シートは、前記内層シートと同形状・同寸法の部分に加えて更に、両シートを積層した際に該内層シートの前記腹側部側の縦方向端部から外方に延出する腹側延出部と、該内層シートの前記背側部側の縦方向端部から外方に延出する背側延出部とを有している前記<1>~<7>の何れか一項に記載のパンツ型使い捨ておむつ。
<9>
前記腹側延出部及び前記背側延出部は、それぞれ、前記内層シート上に配置固定された前記吸収性本体の縦方向両端部を覆うように該内層シート側に折り返されて固定されている前記<8>に記載のパンツ型使い捨ておむつ。
<10>
前記外装体収縮領域において前記表面シートの肌対向面が疎水性シートで被覆されており、
前記疎水性シートが前記腹側延出部及び前記背側延出部である前記<8>又は<9>に記載のパンツ型使い捨ておむつ。
前記外装体収縮領域において前記表面シートの肌対向面が疎水性シートで被覆されている前記<1>~<9>の何れか一項に記載のパンツ型使い捨ておむつ。
<12>
前記疎水性シートは、前記表面シートと前記凸部で接合され、前記凹部では接合されていない前記<10>又は<11>に記載のパンツ型使い捨ておむつ。
<13>
前記疎水性シートと前記表面シートとの接合部は、縦方向に間欠的に配されている前記<12>に記載のパンツ型使い捨ておむつ。
<14>
前記疎水性シートの縦方向内方側の端部は、前記表面シートと接合されておらず、自由端部となっている前記<10>~<13>の何れか一項に記載のパンツ型使い捨ておむつ。
<15>
前記疎水性シートは、横方向に伸縮性を有する不織布からなる前記<10>~<14>の何れか一項に記載のパンツ型使い捨ておむつ。
<16>
前記疎水性シートは、前記表面シートと前記凸部の頂部で接合され、前記凹部では接合されていない前記<10>~<15>の何れか一項に記載のパンツ型使い捨ておむつ。
前記腹側部及び前記背側部は、それぞれ縦方向において、前記吸収性本体が配されていない吸収性本体非存在領域と、該吸収性本体非存在領域より縦方向内方に位置する吸収性本体存在領域とに区分され、前記胴回り弾性部材は両領域に配されている前記<1>~<16>の何れか一項に記載のパンツ型使い捨ておむつ。
<18>
前記外装体収縮領域は、前記吸収性本体非存在領域及び前記吸収性本体存在領域それぞれの全域に形成され、該吸収性本体存在領域における平面視において前記吸収性本体と重なる部位にも形成される前記<17>に記載のパンツ型使い捨ておむつ。
前記外装体収縮領域の非肌対向面側に、縦方向に延びる畝部と溝部とが横方向に交互に配された凹凸構造が形成されている前記<1>~<18>の何れか一項に記載のパンツ型使い捨ておむつ。
<20>
前記外装体収縮領域においては、肌対向面側の前記畝部と非肌対向面側の前記畝部とが横方向において同位置にあると共に、肌対向面側の前記溝部と非肌対向面側の前記溝部とが横方向において同位置にある前記<19>に記載のパンツ型使い捨ておむつ。
<21>
前記腹側部及び前記背側部それぞれにおける前記外装体の縦方向に沿う両側縁部どうしが接合されて一対のサイドシール部が形成されており、複数の前記胴回り弾性部材は、それぞれ、該サイドシール部又はその近傍に位置する部分のみにおいて、前記外層シート及び前記内層シートの両方に接合されており、それ以外の部分では両シートに接合されていない前記<1>~<20>の何れか一項に記載のパンツ型使い捨ておむつ。
<22>
前記外層シート及び前記内層シートは、それぞれ、自然状態又は着用状態において、複数の前記胴回り弾性部材に跨って縦方向に連続して延びる複数本の襞を形成し、該襞が前記畝部となり、横方向に隣り合う該襞どうしの間が前記溝部となる前記<1>~<21>の何れか一項に記載のパンツ型使い捨ておむつ。
1個の前記溝部に複数の前記貫通孔が縦方向に所定間隔を置いて間欠的に配置されている前記<1>~<22>の何れか一項に記載のパンツ型使い捨ておむつ。
<24>
前記外層シート及び前記内層シートの双方が前記貫通孔を複数有し、双方の該貫通孔の全部が1対1で互いに重なっている前記<1>~<23>の何れか一項に記載のパンツ型使い捨ておむつ。
<25>
前記外装体収縮領域において、前記外層シート及び前記内層シートは、縦方向及び横方向の両方向において間欠的に配置された複数の外装体接合部にて互いに接合され、両シートの双方が前記貫通孔を複数有し、該外層シートの1個の該貫通孔と該内層シートの1個の該貫通孔とが該外装体接合部位置にて重なっている前記<1>~<24>の何れか一項に記載のパンツ型使い捨ておむつ。
<26>
前記貫通孔の平面視における最大長さは、好ましくは1mm以上、さらに好ましくは1.5mm以上、そして、好ましくは5mm以下、さらに好ましくは4mm以下である前記<1>~<25>の何れか一項に記載のパンツ型使い捨ておむつ。
<27>
前記外装体収縮領域における前記貫通孔の単位面積当たりの数は、平面視10mm四方の正方形形状の領域の面積を基準とした場合に、好ましくは1個以上、さらに好ましくは2個以上、そして、好ましくは15個以下、さらに好ましくは12個以下である前記<1>~<26>の何れか一項に記載のパンツ型使い捨ておむつ。
<28>
前記表面シートの複数の前記凹部の少なくとも一部については、該凹部の縦方向の延長線上に前記外装体収縮領域の前記溝部が存している前記<1>~<27>の何れか一項に記載のパンツ型使い捨ておむつ。
<29>
前記表面シートの肌対向面の複数の前記凹部それぞれが、前記外装体収縮領域の複数の前記溝部と1対1で対応しており、対応する1個の該溝部と横方向において同位置に存している前記<1>~<28>の何れか一項に記載のパンツ型使い捨ておむつ。
前記表面シートの肌対向面において、横方向において隣り合う前記凸部それぞれの頂部間の離間距離は、好ましくは1.5mm以上、さらに好ましくは2mm以上、そして、好ましくは5mm以下、さらに好ましくは4.5mm以下である前記<1>~<29>の何れか一項に記載のパンツ型使い捨ておむつ。
<31>
前記凹部の縦方向長さは、好ましくは7mm以上、さらに好ましくは10mm以上、そして、好ましくは60mm以下、さらに好ましくは50mm以下である前記<1>~<30>の何れか一項に記載のパンツ型使い捨ておむつ。
<32>
前記腹側部又は前記背側部に存する前記胴回り弾性部材の数は、好ましくは10本以上、さらに好ましくは12本以上、そして、好ましくは35本以下、さらに好ましくは30本以下である前記<1>~<31>の何れか一項に記載のパンツ型使い捨ておむつ。
<33>
前記腹側部又は前記背側部において、平面視において前記吸収体と重なる部分を通って該吸収体を横方向に横断する前記胴回り弾性部材の数は、好ましくは1本以上、そして、好ましくは15本以下、さらに好ましくは12本以下である前記<1>~<32>の何れか一項に記載のパンツ型使い捨ておむつ。
Claims (33)
- 着用者の腹側に配される腹側部及び背側に配される背側部とそれらの間に位置する股下部とを有すると共に、該腹側部から該股下部を介して該背側部に延びる縦方向とこれに直交する横方向とを有し、且つ
吸収体及び該吸収体の肌対向面側に配された表面シートを有する吸収性本体と、該吸収性本体の非肌対向面側に位置して該吸収性本体を固定している外装体とを有し、前記腹側部における該外装体及び前記背側部における該外装体それぞれの縦方向に沿う両側縁部どうしが接合されてウエスト開口部及び一対のレッグ開口部が形成されているパンツ型使い捨ておむつであって、
前記外装体は、前記吸収性本体から相対的に遠い側に位置する外層シートと、該吸収性本体から相対的に近い側に位置する内層シートとを含んで構成され、且つ前記腹側部及び前記背側部の少なくとも一方に、横方向に伸縮性を有する伸縮部を有し、
前記伸縮部における前記外層シートと前記内層シートとの間に、複数の胴回り弾性部材が横方向に伸長した状態で縦方向に間欠的に配されており、それら複数の胴回り弾性部材のうちの一部は、平面視において前記吸収体の縦方向端部と重なる部分を通って該縦方向端部を横方向に横断しており、
前記伸縮部の前記胴回り弾性部材の収縮により、該伸縮部が横方向に収縮した外装体収縮領域が形成され、該外装体収縮領域の肌対向面側に、縦方向に延びる畝部と溝部とが横方向に交互に配された凹凸構造が形成されており、
前記外装体収縮領域における前記外層シート及び前記内層シートの少なくとも一方は、前記吸収体の縦方向端部より縦方向外方に存する前記溝部に、厚み方向に貫通する貫通孔を有しており、
前記表面シートの肌対向面に、着用者の肌側に向かって突出する凸部が複数形成されていると共に、横方向において隣り合う該凸部どうしの間に位置して縦方向に延びる凹部が複数形成されており、複数の該凹部の少なくとも一部は、前記外装体収縮領域の前記溝部と横方向において同位置に存しているパンツ型使い捨ておむつ。 - 前記表面シートは、平面視において前記外装体収縮領域に存する前記吸収体の縦方向端部と重なる請求項1に記載のパンツ型使い捨ておむつ。
- 前記吸収体は、吸収性材料を含む吸収性コアを有し、前記表面シートは、該吸収性コアの縦方向端部より縦方向外方に延出する部分を有し、平面視においてその表面シートの延出部と前記胴回り弾性部材とが重なる請求項1又は2に記載のパンツ型使い捨ておむつ。
- 前記貫通孔は、複数の前記胴回り弾性部材のうちで平面視において前記吸収体の縦方向端部と重ならず且つ該吸収体の縦方向端部に最も近接する弾性部材と、該吸収体の縦方向端部との間に存している請求項1~3の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外層シート及び前記内層シートの双方が前記貫通孔を複数有し、双方の貫通孔の少なくとも一部どうしが重なっている請求項1~4の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域において、前記外層シート及び前記内層シートは、縦方向及び横方向の両方向において間欠的に配置された複数の外装体接合部にて互いに接合され、前記胴回り弾性部材は、該外装体接合部を通らないように配されている請求項1~5の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域において、前記外層シート及び前記内層シートは、縦方向及び横方向の両方向において間欠的に配置された複数の外装体接合部にて互いに接合され、前記貫通孔は、該外装体接合部を厚み方向に貫通している請求項5又は6に記載のパンツ型使い捨ておむつ。
- 前記外層シートは、前記内層シートと同形状・同寸法の部分に加えて更に、両シートを積層した際に該内層シートの前記腹側部側の縦方向端部から外方に延出する腹側延出部と、該内層シートの前記背側部側の縦方向端部から外方に延出する背側延出部とを有している請求項1~7の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記腹側延出部及び前記背側延出部は、それぞれ、前記内層シート上に配置固定された前記吸収性本体の縦方向両端部を覆うように該内層シート側に折り返されて固定されている請求項8に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域において前記表面シートの肌対向面が疎水性シートで被覆されており、
前記疎水性シートが前記腹側延出部及び前記背側延出部である請求項8又は9に記載のパンツ型使い捨ておむつ。 - 前記外装体収縮領域において前記表面シートの肌対向面が疎水性シートで被覆されている請求項1~9の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記疎水性シートは、前記表面シートと前記凸部で接合され、前記凹部では接合されていない請求項10又は11に記載のパンツ型使い捨ておむつ。
- 前記疎水性シートと前記表面シートとの接合部は、縦方向に間欠的に配されている請求項12に記載のパンツ型使い捨ておむつ。
- 前記疎水性シートの縦方向内方側の端部は、前記表面シートと接合されておらず、自由端部となっている請求項10~13の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記疎水性シートは、横方向に伸縮性を有する不織布からなる請求項10~14の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記疎水性シートは、前記表面シートと前記凸部の頂部で接合され、前記凹部では接合されていない請求項10~15の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記腹側部及び前記背側部は、それぞれ縦方向において、前記吸収性本体が配されていない吸収性本体非存在領域と、該吸収性本体非存在領域より縦方向内方に位置する吸収性本体存在領域とに区分され、前記胴回り弾性部材は両領域に配されている請求項1~16の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域は、前記吸収性本体非存在領域及び前記吸収性本体存在領域それぞれの全域に形成され、該吸収性本体存在領域における平面視において前記吸収性本体と重なる部位にも形成される請求項17に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域の非肌対向面側に、縦方向に延びる畝部と溝部とが横方向に交互に配された凹凸構造が形成されている請求項1~18の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域においては、肌対向面側の前記畝部と非肌対向面側の前記畝部とが横方向において同位置にあると共に、肌対向面側の前記溝部と非肌対向面側の前記溝部とが横方向において同位置にある請求項19に記載のパンツ型使い捨ておむつ。
- 前記腹側部及び前記背側部それぞれにおける前記外装体の縦方向に沿う両側縁部どうしが接合されて一対のサイドシール部が形成されており、複数の前記胴回り弾性部材は、それぞれ、該サイドシール部又はその近傍に位置する部分のみにおいて、前記外層シート及び前記内層シートの両方に接合されており、それ以外の部分では両シートに接合されていない請求項1~20の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外層シート及び前記内層シートは、それぞれ、自然状態又は着用状態において、複数の前記胴回り弾性部材に跨って縦方向に連続して延びる複数本の襞を形成し、該襞が前記畝部となり、横方向に隣り合う該襞どうしの間が前記溝部となる請求項1~21の何れか一項に記載のパンツ型使い捨ておむつ。
- 1個の前記溝部に複数の前記貫通孔が縦方向に所定間隔を置いて間欠的に配置されている請求項1~22の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外層シート及び前記内層シートの双方が前記貫通孔を複数有し、双方の該貫通孔の全部が1対1で互いに重なっている請求項1~23の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域において、前記外層シート及び前記内層シートは、縦方向及び横方向の両方向において間欠的に配置された複数の外装体接合部にて互いに接合され、両シートの双方が前記貫通孔を複数有し、該外層シートの1個の該貫通孔と該内層シートの1個の該貫通孔とが該外装体接合部位置にて重なっている請求項1~24の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記貫通孔の平面視における最大長さは、1mm以上5mm以下である請求項1~25の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記外装体収縮領域における前記貫通孔の単位面積当たりの数は、平面視10mm四方の正方形形状の領域の面積を基準とした場合に、1個以上15個以下である請求項1~26の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記表面シートの複数の前記凹部の少なくとも一部については、該凹部の縦方向の延長線上に前記外装体収縮領域の前記溝部が存している請求項1~27の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記表面シートの肌対向面の複数の前記凹部それぞれが、前記外装体収縮領域の複数の前記溝部と1対1で対応しており、対応する1個の該溝部と横方向において同位置に存している請求項1~28の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記表面シートの肌対向面において、横方向において隣り合う前記凸部それぞれの頂部間の離間距離は、1.5mm以上5mm以下である請求項1~29の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記凹部の縦方向長さは、7mm以上60mm以下である請求項1~30の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記腹側部又は前記背側部に存する前記胴回り弾性部材の数は、10本以上35本以下である請求項1~31の何れか一項に記載のパンツ型使い捨ておむつ。
- 前記腹側部又は前記背側部において、平面視において前記吸収体と重なる部分を通って該吸収体を横方向に横断する前記胴回り弾性部材の数は、1本以上15本以下である請求項1~32の何れか一項に記載のパンツ型使い捨ておむつ。
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