WO2020241561A1 - 使い捨ておむつ - Google Patents

使い捨ておむつ Download PDF

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Publication number
WO2020241561A1
WO2020241561A1 PCT/JP2020/020516 JP2020020516W WO2020241561A1 WO 2020241561 A1 WO2020241561 A1 WO 2020241561A1 JP 2020020516 W JP2020020516 W JP 2020020516W WO 2020241561 A1 WO2020241561 A1 WO 2020241561A1
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WO
WIPO (PCT)
Prior art keywords
ventral
dorsal
leak
less
region
Prior art date
Application number
PCT/JP2020/020516
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
優子 福田
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN202090000568.2U priority Critical patent/CN216535789U/zh
Publication of WO2020241561A1 publication Critical patent/WO2020241561A1/ja

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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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • 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 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 specially adapted to be worn around the waist, e.g. diapers, nappies
    • A61F13/494—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 specially adapted to be worn around the waist, e.g. diapers, nappies characterised by edge leakage prevention means

Definitions

  • the present invention relates to disposable diapers.
  • Patent Document 1 has a barrier cuff piece having a proximal edge and a distal edge, and the distal edge of the barrier cuff piece is attached to a top sheet in a cuff end connecting region located at both ends in the longitudinal direction of the diaper. Disposable diapers are disclosed.
  • Patent Document 2 includes an absorbent main body provided with a leak-proof cuff and an outer body fixing the absorbent main body, and a ventral pressing region and a dorsal pushing region formed on the outer body by a waist elastic member. It is disclosed that in a pants-type disposable diaper having a contact area, the contraction force of the ventral pressing area is made larger than the contraction force of the dorsal pressing area.
  • the present invention has an absorbent main body including a liquid-permeable surface sheet, an absorber and a liquid-impermeable leak-proof sheet, and an exterior body arranged on the non-skin contact surface side of the absorbent main body.
  • an absorbent main body including a liquid-permeable surface sheet, an absorber and a liquid-impermeable leak-proof sheet, and an exterior body arranged on the non-skin contact surface side of the absorbent main body.
  • When worn it has a ventral portion arranged on the ventral side of the wearer, a dorsal portion arranged on the dorsal side, and a crotch portion located between the ventral side and the dorsal side, and a waist opening.
  • a pants-type disposable diaper having a pair of leg openings and having a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction.
  • the exterior body has a widthwise telescopic region in which elastic members are arranged along the width direction on the ventral side and the dorsal side.
  • the absorbent body comprises leak-proof cuffs extending along the longitudinal direction on both sides of the longitudinal direction, the leak-proof cuff having free ends at one end in the width direction. And a fixed end at the other end.
  • the leak-proof cuff has a free-end telescopic portion in which a leak-proof cuff elastic member is fixed to the free-end portion along the longitudinal direction, and the surface sheet is located near both ends in the longitudinal direction. It has an end fixing part fixed to.
  • the disposable diaper has a compressive load value in the width direction of 5 cN or less in the non-woven fabric between the free end telescopic portion and the fixed end portion.
  • the widthwise telescopic region includes a dorsal fixing portion that is the end fixing portion on the dorsal side and extends outward from the dorsal fixing portion in the width direction.
  • a dorsal stretchable region and a ventral stretchable region including a ventral fixing portion which is the end fixing portion on the ventral side and extending outward in the width direction from the ventral fixing portion.
  • the stretch stress of the dorsal stretch region is higher than the stretch stress of the ventral stretch region.
  • FIG. 1 is a perspective view schematically showing an embodiment of a disposable diaper of the present invention.
  • FIG. 2 is a plan view schematically showing a skin-facing surface side (inner surface side) in a state where the diaper shown in FIG. 1 is unfolded and fully extended.
  • FIG. 3 is a diagram schematically showing a cross section taken along line III-III shown in FIG.
  • FIG. 4 is a diagram schematically showing a cross section of the crotch portion of the diaper shown in FIG. 1 in a worn state.
  • FIG. 5 is a plan view schematically showing a skin-facing surface side (inner surface side) in a state in which the diaper of another embodiment of the present invention is unfolded and fully extended.
  • FIG. 1 is a perspective view schematically showing an embodiment of a disposable diaper of the present invention.
  • FIG. 2 is a plan view schematically showing a skin-facing surface side (inner surface side) in a state where the diaper shown in FIG. 1 is unfolded and fully extended.
  • FIG. 6 is a plan view schematically showing a skin-facing surface side (inner surface side) in a state in which the diaper according to another embodiment of the present invention is unfolded and fully extended.
  • FIG. 7 is a plan view schematically showing a skin-facing surface side (inner surface side) in a state in which the diaper according to still another embodiment of the present invention is unfolded and fully extended.
  • FIG. 8 is a diagram schematically showing a cross section of the VIII-VIII line shown in FIG. 7.
  • the body shape of young infants is bulging, but the groin at the base of the legs is dented, and there is a large difference in unevenness.
  • the difference in unevenness becomes even larger, and even if the diaper has a leak-proof cuff, the adhesion between the skin and the diaper decreases, and leakage from the inguinal region is likely to occur.
  • Patent Document 1 does not describe any stretching stress in the width direction in relation to the cuff end joint region for fixing the barrier cuff piece, and the barrier cuff piece described in the same document is arranged along the inguinal region. It cannot be done and may cause leakage.
  • Patent Document 2 does not describe any positional relationship between the fixed portions at both ends in the longitudinal direction of the leak-proof cuff and the ventral pressing region or the dorsal pressing region, and the ventral pressing region is the dorsal.
  • the contraction force is larger than that of the side pressing area. Even with such a contractile force relationship, the fit of the leak-proof cuff to the inguinal region cannot be improved, and the skin and the leak-proof cuff hit the skin on the ventral side of the wearer. It is easy to get cuff marks due to contact.
  • the present invention has good standing of the leak-proof cuff and excellent fit to the abdomen, and in the buttocks, the leak-proof cuff and the region between them are excellent in overall fit to prevent leakage.
  • the leak-proof cuff and the region between them are excellent in overall fit to prevent leakage.
  • pants-type disposable diapers with excellent effects.
  • FIGS. 1 and 2 show a pants-type disposable diaper 1 which is an embodiment of the present invention.
  • the diaper 1 is placed between the ventral portion F arranged on the ventral side of the wearer and the dorsal portion R arranged on the dorsal side of the wearer when the diaper is worn. It has a crotch M located in.
  • the ventral portion F and the dorsal portion R are connected in a ring shape to form a waist circumference portion arranged around the waist of the wearer when the diaper 1 is worn.
  • the diaper 1 has a longitudinal direction X corresponding to the front-back direction of the wearer, that is, a direction extending from the ventral side F to the dorsal side R via the crotch portion M, and a width direction Y orthogonal to the longitudinal direction X. ..
  • the diaper 1 includes an absorbent main body 2 and an exterior body 3 arranged on the non-skin facing surface side of the absorbent main body 2.
  • the "skin facing surface” is a surface facing the wearer's skin side when wearing the diaper, that is, a relative wearer when focusing on the disposable diaper or its constituent members (for example, an absorbent body).
  • the "non-skin facing surface” is the surface of the disposable diaper or its components that faces the side opposite to the skin side when the disposable diaper is worn, that is, the surface that is relatively close to the skin of the wearer. It is a surface located on the side far from the skin of the diaper.
  • both sides of the ventral side F and both sides of the dorsal side R of the exterior body 3 are joined to each other by a joining means such as an adhesive, a heat seal, or an ultrasonic seal.
  • the diaper 1 is a pants-type disposable diaper.
  • the diaper 1 is formed with a pair of side seal portions S and S, a waist opening WH through which the wearer's body is passed, and a pair of leg openings LH and LH through which the wearer's lower limbs are passed.
  • the ventral portion F, the dorsal portion R, and the crotch portion M are each divided into three regions by dividing the total length of the diaper 1 in the longitudinal direction X into three equal parts in the expanded and extended state. It is an area.
  • the absorbent main body 2 has a substantially rectangular shape long in the longitudinal direction X.
  • the absorbent body 2 is arranged in the region from the ventral side F to the dorsal side R of the exterior body 3.
  • the "expanded and extended state" is a state in which the diaper 1 is separated by the side seal portion S to be in the expanded state, and the elastic member of each part is extended to remove the influence of the elastic member.
  • the absorbent body 2 is arranged at the center of the exterior body 3 in the width direction Y.
  • the absorbent body 2 is joined to the exterior body 3 by a joining means such as an adhesive.
  • the absorbent main body 2 includes a liquid-retaining absorber 4, a liquid-permeable surface sheet 5 that forms a skin-facing surface of the diaper 1, and a liquid-impervious leak-proof sheet 7.
  • the absorber 4 and the surface sheet 5, and the absorber 4 and the leak-proof sheet 7 are joined by a known joining means such as an adhesive.
  • the absorbent body 4 has a long shape in the longitudinal direction X of the diaper 1.
  • the absorber 4 includes an absorbent core 40 and a core wrap sheet 41 that covers the absorbent core 40.
  • the absorbent core 40 is composed of a fiber aggregate or a fiber aggregate having a water-absorbing polymer retained therein.
  • the core wrap sheet 41 is made of tissue paper or a water-permeable non-woven fabric. The core wrap sheet 41 preferably covers the entire skin-facing surface side and non-skin-facing surface side of the absorbent core 40.
  • the absorbent core 40 has a single layer.
  • the absorbent core 40 may or may not have a flexible portion inward in the width direction Y.
  • Examples of the flexible portion include a slit penetrating the absorbent core 40, a low basis weight portion having a low basis weight, and the like.
  • the absorbent core 40 has a pair of slits 44, 44 extending in the longitudinal direction X as a flexible portion.
  • the slit 44 is arranged at a position inward in the width direction Y at least on both side edges of the absorbent core 40 along the longitudinal direction X at the lower crotch M.
  • the absorbent core 40 has a side region 43 located outside the width direction Y from the slit 44.
  • the side region 2S of the absorbent body 2 is formed at a position corresponding to the side region 43.
  • the basis weight of the low basis weight portion is a high basis weight portion (a portion that is not a low basis weight portion) adjacent to the width direction Y of the low basis weight portion. ) Is preferably 80% or less based on the basis weight of the absorbent core 40.
  • the high basis weight portion may be adjacent to at least the central side in the width direction Y of the low basis weight portion.
  • the density of the low basis weight portion is lower than the density of the high basis weight portion adjacent to the width direction Y, but the thickness of the former is not always smaller than that of the latter, and the former and the latter are equivalent. Or, the former may be larger than the latter.
  • a slit extending in the longitudinal direction X penetrating the absorbent core 40 or a low basis weight portion may be partially arranged in the high basis weight portion.
  • the absorbent core 40 may have multiple layers.
  • the absorbent core is composed of a lower layer side absorbent core and an upper layer side absorbent core, and the width of the lower layer side absorbent core is wider than the width of the upper layer side absorbent core.
  • the width of the lower layer side absorbent core is wider than the width of the upper layer side absorbent core, the portion of the lower layer side absorbent core located outside Y in the width direction from the side edge of the upper layer side absorbent core has a low basis weight.
  • the portion where the upper layer side absorbent core and the lower layer side absorbent core overlap is the high basis weight portion.
  • the surface sheet 5 is arranged on the skin-facing surface side of the absorber 4. As shown in FIG. 3, the surface sheet 5 covers the entire area of the absorber 4 and is wound down from the side edge of the absorber 4 along the longitudinal direction X toward the non-skin facing surface side. The surface sheet 5 is arranged so as to cover the entire skin-facing surface of the absorber 4 and, in addition, cover the non-skin-facing surface side of the absorber 4 on both side regions 43 and 43.
  • the leak-proof sheet 7 is arranged on the non-skin facing surface side of the absorber 4.
  • the leak-proof sheet 7 is arranged so as to cover the entire non-skin facing surface of the absorber 4.
  • an adhesive such as a hot-melt adhesive. ..
  • the exterior body 3 of the diaper 1 is composed of two exterior body forming sheets 31 and 32 and elastic members of each part fixed between the two sheets in an extended state.
  • an elastic member extended in the width direction Y in the region from the peripheral edge of the waist opening WH to the upper end of the leg opening LH. 33 are arranged at intervals in the longitudinal direction X.
  • the elastic member 33 is joined and fixed between the sheets 31 and 32 in an elongated state by an arbitrary joining means such as a hot melt type adhesive.
  • a widthwise expansion / contraction region that expands / contracts in the width direction Y is formed in each of the ventral side F and the dorsal side R.
  • the stretchable region in the width direction has waist gathers on the peripheral edge of the waist opening WH and waist gathers on the waist circumference.
  • the waistline portion is a region from a position 20 mm downward from the peripheral edge of the waist opening WH to the upper end of the leg opening LH.
  • a leg elastic member 34 forming leg gathers is arranged on the peripheral edge of the leg opening LH.
  • the absorbent main body 2 is provided with a pair of leakage-proof cuffs 6 and 6 on both sides along the longitudinal direction X on the skin facing surface.
  • the leak-proof cuff 6 is formed by using a highly flexible non-woven fabric from the viewpoint of improving the fit to the body because it is easy to stand up and bend.
  • the flexibility of the non-woven fabric 60 constituting the leak-proof cuff 6 can be evaluated by the compressive load value.
  • the compressive load value in the diaper width direction of the non-woven fabric 60 between the free end expansion / contraction portion 64 and the fixed end portion 62 of the leakage-proof cuff 6 is preferably 5 cN or less, and more preferably 4 cN or less.
  • the lower limit of the compressive load value is preferably closer to 0 cN, but if it is 1 cN or more, sufficient softness can be imparted to the leak-proof cuff 6.
  • the compressive load value of the non-woven fabric 60 in the diaper width direction is measured by the following method.
  • This non-woven fabric is folded along a line along the width direction at the central portion in the longitudinal direction, and further folded along a line along the width direction at the central portion in the longitudinal direction to form a quadruple measuring piece.
  • the two bonded non-woven fabrics remain in the longitudinal direction. It may be cut out to a size of 40 mm ⁇ 20 mm along the above.
  • the two bonded non-woven fabrics are folded along a line along the width direction at the central portion in the longitudinal direction to form a quadruple measuring piece, and the non-joined portion side is measured. Wrinkles are smoothed out from the measuring piece, and the non-joint side in the folded state is sandwiched by a double clip or the like to align the non-joint parts.
  • the obtained quadruple measuring piece (sample width; 20 mm) is attached to the lower chuck of a compression tester (for example, Shimadzu Autograph compression tester "AG-X”) with the width direction perpendicular to the end.
  • the maximum load shown when compressed at a rate of 10 mm / min is measured with a circular compression plate having a diameter of 30 mm or more attached to the upper side so that 5 mm of the portion protrudes from the upper part of the chuck.
  • the length of the measurement piece in the width direction may be less than 20 mm as long as it can be sandwiched between the chucks of the testing machine so that 5 mm at the end protrudes above the chuck.
  • the same measurement is performed for 5 samples, and the average value thereof is taken as the compressive load value.
  • the leakage-proof cuff 6 is configured by arranging two non-woven fabrics 60, 60 having a compressive load value of 5 cN or less so as to face each other.
  • the two non-woven fabrics may be separate non-woven fabrics that satisfy the conditions of the compressive load value, or one non-woven fabric that satisfies the conditions of the compressive load value may be folded in half.
  • the leakage-proof cuff 6 is configured by folding one non-woven fabric 60 in half and arranging the two non-woven fabrics 60, 60 so as to face each other.
  • one or more leak-proof cuff elastic members 63 are fixed by an adhesive between the two non-woven fabrics 60 and 60. .. Since the leak-proof cuff elastic member 63 is fixed in an extended state along the longitudinal direction X, the leak-proof cuff 6 has a free end telescopic portion 64 at the free end portion 61.
  • the leakage-proof cuff 6 has end fixing portions 6F and 6R directly fixed on the surface sheet 5 of the absorbent main body 2 in the vicinity of both ends in the longitudinal direction X.
  • the end fixing portions 6F and 6R are formed at positions separated from each end position on the ventral side F side and the dorsal side R side in the longitudinal direction X in the free end telescopic portion 64 along the longitudinal direction X. There is.
  • the free end 61 of the leak-proof cuff 6 is fixed on the surface sheet 5, and the ventral fixing portion 6F, which is the ventral end fixing portion, is formed.
  • the free end portion 61 of the leakage-proof cuff 6 is fixed on the surface sheet 5, and the dorsal side fixing portion 6R which is the dorsal end portion fixing portion is formed.
  • a known fixing method such as a heat seal, an ultrasonic seal, or a hot melt type adhesive can be used.
  • the leak-proof cuff 6 has a free-end telescopic portion 64 of the leak-proof cuff elastic member 63 when the diaper 1 is worn in an upright region between the ventral fixing portion 6F and the dorsal fixing portion 6R. By contracting, it comes to stand up at the lower crotch M. By standing the leak-proof cuff 6, it is possible to prevent excrement such as urine from flowing out in the width direction Y.
  • the leak-proof cuff 6 has a free end 61 at one end and a fixed end 62 at the other end of both ends in the width direction Y.
  • a free end telescopic portion 64 is formed in the free end portion 61 in an upright region of the leakage-proof cuff 6.
  • the end of the leak-proof cuff 6 opposite to the free end 61 is joined to the surface sheet 5 wound up on the non-skin facing surface side of the side region 43 of the absorber 4.
  • the leak-proof cuff 6 has a fixed end 62 at a position inward in the width direction Y with respect to the side edge of the absorber 4 along the longitudinal direction X.
  • a known bonding method such as heat seal, ultrasonic seal, hot melt type adhesive or the like can be used.
  • the fixed end 62 extends along the side edge of the absorbent body 2.
  • the leak-proof cuff 6 has a bent portion 66 in which the leak-proof cuff 6 is bent between the free end portion 61 and the fixed end portion 62 in the extended unfolded state. There is.
  • the region between the free end portion 61 and the bent portion 66 is folded back on the skin-facing surface of the absorbent body 2.
  • the bent portion 66 is located outside the free end portion 61 in the width direction Y.
  • the leak-proof cuff 6 bent in this way is a so-called inward folding type.
  • the leak-proof cuff 6 may or may not have an elastic member at the bent portion 66.
  • the leak-proof cuff 6 has one elastic member 67 at the bent portion 66 from the viewpoint that the leak-proof cuff 6 is easily bent.
  • the elastic member 67 extending along the longitudinal direction X is fixed by an adhesive between the two non-woven fabrics 60 and 60 at the crotch portion M.
  • a stretchable region in the width direction is continuously formed in the exterior body 3 in the width direction Y between the waist opening and the leg opening.
  • the widthwise stretchable region has a ventral stretchable region 7F including a ventral fixed portion 6F and a dorsal stretchable region 7R including a dorsal fixed portion 6R.
  • the ventral telescopic region 7F is a region including the ventral fixing portion 6F and extending outward from the ventral fixing portion 6F in the width direction Y.
  • the dorsal telescopic region 7R includes the dorsal fixing portion 6R and extends outward from the dorsal fixing portion 6R in the width direction Y.
  • the stretching stress of the dorsal stretching region 7R is higher than the stretching stress of the ventral stretching region 7F.
  • the expansion / contraction region located at the end fixing portions 6F and 6R as described above is the longitudinal length of the end fixing portions 6F and 6R when the expansion / contraction region in the width direction is viewed along the longitudinal direction X in the expanded state shown in FIG. The area at the same position as the position in the direction X.
  • the position of the end fixing portions 6F, 6R in the longitudinal direction X is the position of the end fixing portions 6F, 6R at the longest portion in the longitudinal direction X. Therefore, the length of the telescopic regions 7F and 7R in the longitudinal direction X coincides with the longest length of the end fixing portions 6F and 6R in the longitudinal direction X.
  • the expansion / contraction regions 7F and 7R located at the end fixing portions 6F and 6R are on the surface sheet 5 of the absorbent body 2 when they are inwardly folded type cuffs as in the leak-proof cuff 6 shown in FIG. Since there is only one end fixing portion 6F, 6R, it can be specified based on the end fixing portion 6F, 6R. On the other hand, as in the case of the leak-proof cuff 6 shown in FIG. 7, which will be described later, when the cuff is an outward folding type, there are two end fixing portions 6F and 6R on the surface sheet 5 of the absorbent main body 2. When there are a plurality of end fixing portions 6F and 6R in this way, the expansion and contraction regions 7F and 7R are specified based on the end fixing portions 6F and 6R closest to the skin facing surface.
  • the non-woven fabric 60 in the region between the free end expansion / contraction portion 64 and the fixed end portion 62 is flexible with a compressive load value of 5 cN or less, and the ventral fixed portion 6F. Since the pressing force on the skin is lower than that on the back side fixing portion 6R side, the responsiveness to the tension of the leak-proof cuff elastic member 63 is good, and even if the leak-proof cuff 6 is bent once, its resilience is high.
  • the leak-proof cuff 6 has good uprightness and excellent fit to the abdomen, for example, the inguinal region.
  • the dorsal stretchable region 7R has a higher stretchable stress than the ventral stretchable region 7F
  • the leak-proof cuff 6 and the region in between are excellent in fit to the skin as a whole in the buttocks.
  • the stretching stress of the ventral stretching region 7F on the ventral side F side is relatively low, even if the leak-proof cuff 6 is brought into close contact with the skin on the ventral side of the wearer, the skin and the leak-proof cuff come into contact with each other. It is difficult to leave a cuff mark due to. Diaper 1 is particularly effective for young children up to 10 months old.
  • the stretching stress of the dorsal stretching region 7R is 1.04 with respect to the stretching stress of the ventral stretching region 7F. It is preferably times or more, 1.05 times or more, more preferably 2.0 times or less, further preferably 1.8 times or less, and 1.04 times or more.
  • the stretching stress of the dorsal stretching region 7R is preferably 0.8 cN / mm or more, and preferably 1.0 cN / mm or more, from the viewpoint of bringing the leakage-proof cuff 6 into close contact with the skin. More preferably, it is preferably 7.0 cN / mm or less, further preferably 6.0 cN / mm or less, and preferably 0.8 cN / mm or more and 7.0 cN / mm or less. It is more preferably 0 cN / mm or more and 6.0 cN / mm or less.
  • the stretching stress of the ventral stretching region 7F is preferably 0.6 cN / mm or more, preferably 0.8 cN / mm or more, from the viewpoint of erecting the leakage-proof cuff 6 along the inguinal region. It is more preferably 5.5 cN / mm or less, more preferably 4.5 cN / mm or less, and preferably 0.6 cN / mm or more and 5.5 cN / mm or less. , 0.8 cN / mm or more and 4.5 cN / mm or less is more preferable.
  • the stretch stress of the stretch regions 7F and 7R is measured by the following method.
  • the side seal portion S of the diaper 1 is peeled off, the diaper 1 is in the expanded state, and the stretchable stress measurement target portion is formed on a flat surface from the exterior body 3 in the extended state. It is cut out as a measurement sample having a rectangular shape that is long in the width direction Y. At the time of this cutting, not only the exterior body but also the entire diaper including the absorbent body and the like are cut.
  • a region existing at the same position as the position of the ventral fixed portion 6F in the longitudinal direction X is cut out from the stretchable region in the width direction of the stretched diaper, and this is used as a measurement sample of the ventral stretchable region 7F.
  • a region existing at the same position as the position of the dorsal fixed portion 6R in the longitudinal direction X is cut out from the stretchable region in the width direction, and this is used as a measurement sample of the dorsal stretchable region 7R.
  • the length of the diaper 1 in the longitudinal direction X and the length of the diaper 1 in the width direction Y are measured.
  • the measurement sample is fixed between the chucks of a tensile tester (for example, "RTA-100" manufactured by Orientec Co., Ltd.) so that the longitudinal direction and the tensile direction of the measurement sample coincide with each other.
  • the distance between the chucks is 100 mm.
  • the measurement sample is fixed between the chucks, and the distance between the chucks is increased at a speed of 300 mm / min to a length at which the elongation of the measurement sample becomes 80, and then until the elongation at which the measurement sample becomes 71.
  • the tensile load (N) when reduced is measured, and this is taken as the stress (N) of the measurement sample.
  • the degree of elongation is the ratio of the length in the longitudinal direction of the measurement sample elongated in the longitudinal direction of the measurement sample to the total length when the total length in the longitudinal direction of the measurement sample is 100.
  • the length of the measurement sample in the longitudinal direction is 350 mm
  • the length of the measurement sample in the longitudinal direction at the degree of elongation 80 is 280 mm
  • the length in the longitudinal direction of the measurement sample at the degree of elongation 71 is 250 mm.
  • the value obtained by dividing the obtained stress (N) by the length X in the longitudinal direction of the diaper 1 measured in advance is defined as the stretch stress (cN / mm) of the measurement sample.
  • the elastic member 33 arranged in the dorsal stretching region 7R exists per type, thickness, and longitudinal direction X1 cm. It is possible to make the number of pieces to be formed, the expansion ratio, etc. different from the elastic member 33 arranged in the ventral expansion / contraction region 7F. Specifically, it is preferable to combine any one of the following configurations (1) to (3), or two or more of these. Configuration (1) When the elastic members 33 arranged in the dorsal elastic region 7R and the ventral elastic region 7F are filamentous, they exist per the longitudinal direction X1 cm of the elastic members 33 arranged in the dorsal elastic region 7R.
  • the number of elastic members (number per unit area) is set to be larger than the number of elastic members 33 arranged in the ventral telescopic region 7F.
  • Configuration (2) When the elastic members 33 arranged in the dorsal elastic region 7R and the ventral elastic region 7F are filamentous, the average thickness of each elastic member 33 arranged in the dorsal elastic region 7R is set to the belly. It is made larger than the average thickness of each elastic member 33 arranged in the side expansion / contraction region 7F. The thickness of all elastic members arranged in the stretchable region in the non-stretched state is obtained, and the average value thereof is defined as the "average thickness".
  • the average elongation ratio of each elastic member 33 arranged in the dorsal stretchable region 7R is set to the abdomen. It is made larger than the average elongation ratio of each elastic member 33 arranged in the side expansion / contraction region 7F.
  • the elongation ratio is measured by the following method.
  • the exterior body 3 shown in FIG. 2 has a waist end portion of the waist opening WH from the outer end of the ventral elastic region 7F in the longitudinal direction X, that is, an end portion of the ventral side portion F in the longitudinal direction X.
  • a stretchable region 71F on the waist end side is provided in a portion located on the side.
  • the stretchable region 71F is a ventral low stretchable stress region having a lower stretchable stress than the ventral stretchable region 7F. Since it is configured in this way, it is difficult for gather marks on the elastic region 71F to be formed on the skin on the ventral side.
  • a stretchable region 72F on the leg opening LH side is provided at a portion of the ventral stretchable region 7F located on the leg opening LH side from the inner end in the longitudinal direction X.
  • the stretchable region 72F has a higher stretchable stress than the ventral stretchable region 7F. With this configuration, the leak-proof cuff 6 tends to stand up along the inguinal region on the ventral side F.
  • the stretching stress of the stretching regions 71F and 72F is measured by the same method as the stretching stress of the stretching regions 7F and 7R described above.
  • the elastic stress of the ventral elastic region 7F is preferably 1.04 times or more, preferably 1.05 times the elastic stress of the elastic region 71F. It is more preferably more than twice, more preferably 2.0 times or less, further preferably 1.8 times or less, and more preferably 1.04 times or more and 2.0 times or less. It is more preferably 1.05 times or more and 1.8 times or less.
  • the exterior body 3 shown in FIG. 2 has a waist end portion of the waist opening WH from the outer end of the dorsal side expansion / contraction region 7R in the longitudinal direction X, that is, an end portion of the dorsal side portion R in the longitudinal direction X.
  • a stretchable region 71R on the waist end side is provided in a portion located on the side.
  • the stretchable region 71R is a dorsal low stretchable stress region having a lower stretchable stress than the dorsal stretchable region 7R. Since it is configured in this way, it is difficult for the gather marks of the elastic region 71R to be attached to the skin on the back side.
  • the expansion / contraction region 71R includes a first expansion / contraction region R1 up to a position 40 mm downward from the peripheral edge of the waist opening WH and a second expansion / contraction region R2 from the 40 mm distance to the upper end of the leg opening LH. It has two categories. Both the first stretchable region R1 and the second stretchable region R2 have lower stretchable stress than the dorsal stretchable region 7R. The first expansion / contraction region R1 has a lower expansion / contraction stress than the second expansion / contraction region R2. Since it is configured in this way, the leak-proof cuff 6 easily adheres to the skin on the dorsal side R.
  • the stretching stress of the stretching regions 71R, R1 and R2 is measured by the same method as the stretching stress of the stretching regions 7F and 7R described above.
  • the elastic stress of the dorsal elastic region 7R is preferably 1.1 times or more with respect to the elastic stress of the elastic region 71R, preferably 1.15. It is more preferably more than twice, more preferably 2.0 times or less, further preferably 1.8 times or less, and preferably 1.1 times or more and 2.0 times or less. It is more preferably 1.15 times or more and 1.8 times or less.
  • the length Lf1 of the ventral fixing portion 6F in the longitudinal direction X is the dorsal fixing portion. It is preferably shorter than the length Lr1 of the longitudinal direction X of 6R.
  • the length of the end fixing portion in the longitudinal direction X means the longest length of the end fixing portion in the longitudinal direction X.
  • the length Lr1 with respect to the length Lf1 is preferably 1.1 times or more, more preferably 1.2 times or more, and preferably 2.0 times or less, and 1.8 times or less.
  • the length Lf1 is preferably 30 mm or more, more preferably 35 mm or more, and 65 mm or less from the viewpoint that the leakage-proof cuff 6 easily stands up along the inguinal region in the ventral portion F. Is more preferable, 60 mm or less is more preferable, and 30 mm or more and 65 mm or less is preferable, and 35 mm or more and 60 mm or less is further preferable.
  • the length Lr1 is preferably 40 mm or more, more preferably 45 mm or more, and more preferably 70 mm or less. It is more preferably 65 mm or less, more preferably 40 mm or more and 70 mm or less, and further preferably 45 mm or more and 65 mm or less.
  • the entire area between the leak-proof cuff 6 and the leak-proof cuff 6 is brought into close contact with the skin along the dent of the waist on the dorsal side R, or the leak-proof cuff 6 is attached to the abdomen on the ventral side F.
  • the deployed state shown in FIG. 2 From the viewpoint of standing up along the boundary between the bulge and the inguinal region and fitting to the complex uneven body shape of the infant, in the deployed state shown in FIG. 2, from the waist end to the ventral fixation portion on the ventral side F side.
  • the distance Lf2 to the end on the crotch M side is shorter than the distance Lr2 from the waist end on the dorsal R side to the end on the crotch M side of the dorsal fixing portion 6R.
  • the distance Lf2 is the distance between the peripheral edge of the waist opening WH and the lower end of the ventral fixed portion 6F on the M side of the crotch in the deployed state shown in FIG.
  • the distance Lr2 is the distance between the peripheral edge of the waist opening WH and the lower end of the dorsal fixed portion 6R on the M-side of the crotch.
  • the distance Lr2 with respect to the distance Lf2 is preferably 1,05 times or more, more preferably 1.1 times or more, more preferably 1.5 times or less, and preferably 1.4 times or less. Is more preferable, and 1.05 times or more and 1.5 times or less is preferable, and 1.1 times or more and 1.4 times or less is further preferable.
  • the length Lf2 is preferably 50 mm or more, more preferably 55 mm or more, and more preferably 105 mm or less, from the viewpoint that the leakage-proof cuff 6 easily stands up along the inguinal region in the ventral portion F. It is more preferably 100 mm or less, more preferably 50 mm or more and 105 mm or less, and further preferably 55 mm or more and 100 mm or less.
  • the length Lr2 is preferably 60 mm or more, more preferably 65 mm or more, and more preferably 130 mm or less. It is more preferably 120 mm or less, more preferably 60 mm or more and 130 mm or less, and further preferably 65 mm or more and 120 mm or less.
  • the distance Lf3 from the waist end to the ventral F-side end of the free end telescopic portion 64 is from the waist end on the dorsal R side to the dorsal R side end of the free end telescopic portion 64. It is preferably shorter than the distance Lr3.
  • the distance Lf3 is the distance between the peripheral edge of the waist opening WH on the ventral side F and the end of the free end telescopic portion 64 closest to the waist opening WH in the deployed state shown in FIG.
  • the distance Lr3 is the distance between the peripheral edge of the waist opening WH on the dorsal side R and the end of the free end telescopic portion 64 closest to the waist opening WH.
  • the end of the free end telescopic portion 64 shifts two pieces of the non-woven fabric 60 constituting the leak-proof cuff in the vicinity of the position assumed to be the end of the free end telescopic portion 64 in the contracted leak-proof cuff 6.
  • the end portion where the leak-proof cuff elastic member is joined to the non-woven fabric 60 can be specified, and the end portion can be specified as the end of the free end expansion / contraction portion 64.
  • the distance Lr3 with respect to the distance Lf3 is preferably 1.05 times or more, more preferably 1.1 times or more, more preferably 3.0 times or less, and 2.5 times or less. Is more preferable, and 1.05 times or more and 3.0 times or less is preferable, and 1.1 times or more and 2.5 times or less is further preferable.
  • the length Lf3 is preferably 50 mm or more, more preferably 55 mm or more, and 120 mm or less from the viewpoint that the leak-proof cuff 6 easily stands up along the inguinal region in the ventral portion F. It is more preferably 110 mm or less, more preferably 50 mm or more and 120 mm or less, and further preferably 55 mm or more and 110 mm or less.
  • the length Lr3 is preferably 60 mm or more, more preferably 65 mm or more, and more preferably 140 mm or less. It is more preferably 130 mm or less, more preferably 60 mm or more and 140 mm or less, and further preferably 65 mm or more and 130 mm or less.
  • the leak-proof cuff 6 easily adheres to the dorsal portion R along the buttocks, unlike the embodiment shown in FIG. 2, at least the dorsal portion R of the ventral portion F and the dorsal portion R It is preferable that the free end telescopic portion 64 and the dorsal side fixing portion 6R partially overlap in the thickness direction, from the waist end portion on the dorsal side R side to the end portion of the free end telescopic portion 64 on the dorsal side R side. It is preferable that the distance Lr3 to is less than or equal to the distance Lr2 from the waist end on the dorsal R side to the end on the crotch M side of the dorsal fixing portion 6R.
  • the distance Lr2 with respect to the distance Lr3 is preferably 1.0 times or more, more preferably 1.05 times or more, preferably 1.4 times or less, and 1.3 times or less. Is more preferable, and 1.0 times or more and 1.4 times or less is preferable, and 1.05 times or more and 1.3 times or less is further preferable. From the viewpoint that the leak-proof cuff 6 easily stands up along the inguinal region in the ventral side F, the free end expansion / contraction portion 64 and the ventral fixed portion 6F partially overlap in the thickness direction in the ventral side F.
  • the distance Lf3 from the waist end on the ventral F side to the ventral F side end of the free end telescopic portion 64 is from the waist end on the ventral F side to the ventral fixed portion 6F. It is preferable that the distance to the end of the crotch portion M side is Lf2 or less.
  • the distance Lf2 with respect to the distance Lf3 is preferably 1.0 times or more, more preferably 1.05 times or more, preferably 1.7 times or less, and 1.5 times or less. Is more preferable, and 1.0 times or more and 1.7 times or less is preferable, and 1.05 times or more and 1.5 times or less is further preferable.
  • the belly of the absorbent body 2 from the viewpoint that the leak-proof cuff 6 is more likely to stand up on the ventral side F side than the dorsal side R side, and the leak-proof cuff 6 is easier to stand up along the inguinal region on the ventral side F.
  • the distance Lf4 from the end on the side F side to the end on the ventral side F side of the free end telescopic portion 64 is from the end on the dorsal side R side of the absorbent body 2 to the dorsal side of the free end telescopic portion 64.
  • the distance to the end on the R side is preferably shorter than Lr4.
  • the distance Lf4 is the distance between the end of the absorbent body 2 closest to the waist opening WH and the end of the free end telescopic portion 64 closest to the waist opening WH in the ventral side F in the deployed state shown in FIG. ..
  • the distance Lr4 is the distance between the end of the absorbent body 2 closest to the waist opening WH and the end of the free end telescopic portion 64 closest to the waist opening WH on the dorsal side R.
  • the distance Lr4 with respect to the distance Lf4 is preferably 1.1 times or more, more preferably 1.2 times or more, preferably 2.0 times or less, and 1.8 times or less. Is more preferable, and 1.1 times or more and 2.0 times or less is preferable, and 1.2 times or more and 1.8 times or less is further preferable.
  • the length Lf4 is preferably 25 mm or more, more preferably 30 mm or more, and 70 mm or less from the viewpoint that the leakage-proof cuff 6 easily stands up along the inguinal region in the ventral portion F. It is more preferably 65 mm or less, more preferably 25 mm or more and 70 mm or less, and further preferably 30 mm or more and 65 mm or less.
  • the length Lr4 is preferably 30 mm or more, more preferably 35 mm or more, and more preferably 80 mm or less. It is more preferably 70 mm or less, more preferably 30 mm or more and 80 mm or less, and further preferably 35 mm or more and 70 mm or less.
  • ventral fixing portion 6F and the dorsal fixing portion 6R overlaps the elastic member 33 arranged in the ventral telescopic region 7F or the dorsal telescopic region 7R in the thickness direction.
  • the stretching stress of the ventral stretching region 7F or the dorsal stretching region 7R is easily transmitted to the leakage-proof cuff 6 via the ventral fixing portion 6F or the dorsal fixing portion 6R, and is prevented from being worn.
  • the leak cuff 6 is likely to stand up.
  • the elastic member 33 that overlaps the ventral fixing portion 6F or the dorsal fixing portion 6R in the thickness direction is excluding the end portion of the elastic member 33 that does not exhibit the expansion / contraction performance in the width direction Y.
  • the elastic member 33 shown in FIG. 2 is located at a position where at least a part on the crotch portion M side overlaps with the region 2T sandwiched between the inner edges of the side region 2S and 2S among the portions overlapping with the absorbent body 2. It is finely divided and exists in a state of being divided (not shown). The fragmented body is no longer in a state of exhibiting the contractile force of the elastic member. On the other hand, the elastic member 33 exerts a contraction force from the outer edge of the side region 2S to the outside in the width direction Y, including a position overlapping the side region 2S, and gathers around the waist are formed. In the embodiment shown in FIG.
  • the ventral fixing portion 6F overlaps the elastic member 33 arranged in the ventral telescopic region 7F in the thickness direction
  • the dorsal fixing portion 6R is arranged in the dorsal telescopic region 7R. It overlaps with the elastic member 33 in the thickness direction.
  • the leak-proof cuff 6 is joined to the surface sheet 5 wound up on the non-skin facing surface side of the side region 43 of the absorber 4, the leak-proof cuff 6 is erected.
  • the side region 43 of the absorber 4 is likely to stand up in the crotch portion M, and is more likely to fit the skin in the crotch portion M. Further, since the body fluid can be absorbed from the non-skin facing surface side of the side region 43, the leakage prevention effect is improved.
  • the leak-proof cuff 6 is formed by using a highly flexible non-woven fabric from the viewpoint of improving the fit to the body because it is easy to stand up and bend.
  • the leak-proof cuff 6 is formed by using, for example, a non-woven fabric 60 having a bulk softness of preferably 10 cN or less. From the same viewpoint, the bulk softness of the nonwoven fabric 60 is more preferably 10 cN or less, and even more preferably 8 cN or less. The closer the lower limit of the bulk softness of the non-woven fabric 60 is to 0, the more preferable it is, but if it is 3 cN or more, sufficient softness can be imparted to the leak-proof cuff 6.
  • the bulk softness of the non-woven fabric 60 is measured by the following method.
  • the non-woven fabric constituting the leak-proof cuff 6 or the non-woven fabric used for the leak-proof cuff 6 is 150 mm in the CD direction along the orientation direction of the constituent fibers and orthogonal to the CD direction. Cut out 30 mm in the MD direction and use this as a measurement piece. This measuring piece is stapled at two upper and lower ends using a stapler so as to form a ring with a diameter of 45 mm. At this time, the stapler core is made longer in the CD direction.
  • the ring-shaped measuring piece is erected in a tubular shape on a sample table, and is substantially parallel to the table from above.
  • the maximum load shown when compressed at a compression rate of 10 mm / min with a circular compression plate having a diameter of 30 mm or more is measured. This measurement is performed at any three points cut out from the leak-proof cuff, and the average value of these is taken as bulk softness.
  • the average deviation (MMD) of the friction coefficient of the non-woven fabric 60 constituting the leak-proof cuff 6 is preferably 0.012 or less, and more preferably 0.01 or less.
  • the lower limit of the average deviation MMD of the friction coefficient in the non-woven fabric 60 is preferably closer to 0, but if it is 0.003 or more, sufficient softness can be imparted to the leakage-proof cuff 6.
  • the non-woven fabric 60 constituting the leak-proof cuff 6 preferably has an average deviation SMD of its surface roughness of 2.2 ⁇ m or less, and more preferably 2.0 ⁇ m or less.
  • the lower limit of the average deviation SMD of the surface roughness of the non-woven fabric 60 is preferably closer to 0, but if it is 0.5 ⁇ m or more, sufficient softness can be imparted to the leak-proof cuff 6.
  • the mean deviation MMD of friction coefficient and the mean deviation SMD of surface roughness are measured by the following method using KESFB4-AUTO-A (trade name) manufactured by Kato Tech Co., Ltd. according to the method described in the following book. .. Kio Kawabata, "Standardization and Analysis of Texture Evaluation", 2nd Edition, Texture Measurement and Standardization Research Committee, Japan Textile Opportunity Society, published on July 10, 1980.
  • test piece A 20 cm ⁇ 20 cm test piece is taken out from the non-woven fabric constituting the leak-proof cuff or the non-woven fabric used for the leak-proof cuff. If a test piece of this size cannot be taken out, the size of the test piece may be changed as appropriate.
  • the test piece is attached to a test table on a smooth metal surface. The contact surface is crimped to the test piece with a force of 49 cN, and the test piece is moved horizontally by 2 cm at a constant speed of 0.1 cm / sec. A uniaxial tension of 7.3 cN / cm is applied to the test piece.
  • the contact is made by arranging 20 piano wires having the same diameter of 0.5 mm as the contact used for measuring the surface roughness and bending them into a U shape with a width of 10 mm.
  • the contact surface of the contactor is pressed against the test piece by a weight with a force of 49 cN.
  • the measured value of the mean deviation of the coefficient of friction is represented by the MMD value.
  • This measurement is performed for both MD and CD to obtain MMD MD and MMD CD , and the average value is calculated from the following formula [B], which is used as the average deviation MMD of the friction coefficient. If only one of MD and CD can be taken out as a sample test piece, the value of only one is taken as the mean deviation MMD of the friction coefficient.
  • the MD is the flow direction at the time of manufacturing the non-woven fabric or the longitudinal direction of the diaper
  • the CD is the direction orthogonal to the MD.
  • Mean deviation of friction coefficient MMD ⁇ (MMD MD 2 + MMD CD 2 ) / 2 ⁇ 1/2 ... [B]
  • test piece is taken out from the non-woven fabric forming the leak-proof cuff. If a test piece of this size cannot be taken out, the size of the test piece may be changed as appropriate. Attach the test piece to a test table on a smooth metal surface. The contact is crimped to the test piece with 9.8 cN (within ⁇ 0.49 cN error). The test piece is moved horizontally by 2 cm at a constant speed of 0.1 cm / sec. A uniaxial tension of 7.3 cN / cm is applied to the test piece. The contact is a piano wire having a diameter of 0.5 mm bent into a U shape with a width of 5 mm.
  • the contact surface of the contactor is pressed against the test piece with a force of 9.8 cN.
  • the contacts are spring-loaded.
  • the spring constant shall be 24.5 cN / mm (within ⁇ 0.98 cN / mm error), and the resonance frequency shall be 30 Hz or more in a state away from surface contact.
  • the measured value of the average deviation of the surface roughness is represented by the SMD value. This measurement is performed for both MD and CD to obtain SMD MD and SMD CD , and the average value is calculated from the following formula [C], which is used as the average deviation SMD of the surface roughness. If only one of MD and CD can be taken out as a sample test piece, the value of only one is defined as the surface roughness SMD.
  • the leak-proof cuff 6 has a good feel on the skin, and the amount of deformation of the leak-proof cuff 6 at 1 kPa compression is small from the viewpoint that the cuff marks caused by the contact between the skin and the leak-proof cuff 6 are less likely to adhere to the skin. It is preferably 1 mm or more, more preferably 1.1 mm or more. The amount of deformation at the time of 1 kPa compression is measured by the following method.
  • the leak-proof cuff is taken out from the disposable diaper, and with the leak-proof cuff extended, a test piece having a width of 5 mm from the free end portion 61 and a length of 120 mm in the longitudinal direction is cut out so as to include the free end telescopic portion 64, and the test piece is cut out. Is attached to the test stand of the measuring device in a state of being extended to 70 mm. At this time, the leak-proof cuff elastic member is arranged so as to be located in the center of the test table.
  • a KES compression tester (KESFB3-AUTO-A manufactured by Kato Tech Co., Ltd.) is used to compress the test piece (free end expansion / contraction part) under the following conditions, and when compressed by 1 kPa from the stress-strain at that time. The amount of deformation of is calculated. Compression rate: 0.02 mm / s Compressor: 2 cm 2 circular plate
  • FIG. 5 to 7 show another embodiment of the pants-type disposable diaper.
  • the diapers according to these embodiments will be described as being different from the diapers according to the above-described embodiments.
  • the points not particularly described are the same as those of the diaper according to the above-described embodiment, and the description of the diaper is appropriately applied.
  • the diapers of these embodiments also have the same effects as the diapers of the above-described embodiments.
  • the absorbent main body 2 extends to the waist opening WH side in the dorsal side R as compared with the diaper 1 shown in FIG. Further, the length Lr1 of the dorsal fixing portion 6R in the longitudinal direction X is longer than the length Lr1 of the dorsal fixing portion 6R of the diaper 1 shown in FIG. In the diaper 1A shown in FIG. 5, the length Lf1 of the ventral fixing portion 6F is shorter than the length Lr1 of the dorsal fixing portion 6R.
  • the dorsal telescopic region 7R located at the dorsal fixed portion 6R is divided into two at the center of the longitudinal direction X, and the third telescopic region R3 on the leg opening LH side and the third telescopic region R3. It has a fourth telescopic region R4 on the WH side of the waist opening.
  • the stretching stress of the fourth stretching region R4 is substantially the same as the stretching stress of the ventral stretching region 7F.
  • the stretching stress of the third stretching region R3 is higher than the stretching stress of the ventral stretching region 7F.
  • the stretching stress of the dorsal stretching region 7R is obtained by averaging the stretching stress of the fourth stretching region R4 and the stretching stress of the third stretching region R3, and the dorsal stretching region 7R of the diaper 1A is obtained from the ventral stretching region 7F. Also, the tensile stress is high.
  • the stretchable region 71R from the dorsal stretchable region 7R to the waist end side is a dorsal low stretchable stress region having a lower stretchable stress than the fourth stretchable region R4.
  • the absorbent main body 2 extends to the waist opening WH side on the dorsal side R as compared with the diaper 1 shown in FIG.
  • the diaper 1B has a dorsal telescopic region 7R located at the dorsal fixing portion 6R, a dorsal telescopic region 7R to the waist end side, a dorsal telescopic region 71R, and a dorsal telescopic region. It has an expansion / contraction region 72R from 7R on the leg opening LH side.
  • the dorsal stretchable region 7R of the diaper 1B has a stretchable stress higher than the stretchable stress of the ventral stretchable region 7F.
  • the stretchable region 72R of the diaper 1B has a lower stretchable stress than the dorsal stretchable region 7R of the diaper 1B.
  • the stretchable region 71R of the diaper 1B is a dorsal low stretchable stress region having a lower stretchable stress than the stretchable region 72R and the dorsal stretchable region 7R of the diaper 1B.
  • the absorbent main body 2 extends to the waist opening WH side in the dorsal side R as compared with the diaper 1 shown in FIG.
  • the leak-proof cuff 6 of the diaper 1C has a different folding shape from the diaper 1 shown in FIG.
  • the leak-proof cuff 6 of the diaper 1C has a bent portion 66 in which the leak-proof cuff 6 is bent.
  • the bent portions 66 are located at intervals inward in the width direction Y from the side edges of the absorber 4 along the longitudinal direction X.
  • the free end portion 61 is located outside Y in the width direction with respect to the bent portion 66.
  • the leak-proof cuff 6 of the diaper 1C bent in this way is a so-called outer folding type.
  • the outer folding type leak-proof cuff 6 has a plurality of end fixing portions fixed on the surface sheet 5 of the absorbent main body 2.
  • the ventral fixing portion 6F and the dorsal fixing portion 6R are each on the surface of the absorbent main body 2 from the bent portion 66 to the fixed end portion 62 side.
  • the first end fixing portion 6A directly fixed on the sheet 5 and the second end portion in which the portion from the bent portion 66 to the free end portion 61 side is indirectly fixed on the surface sheet 5 of the absorbent main body 2. It has a fixed portion 6B.
  • the second end fixing portion 6B is formed by fixing a portion from the bent portion 66 to the free end portion 61 side and a portion from the bent portion 66 to the fixed end portion 62 side on the surface sheet 5. It is fixed on the sheet 5.
  • the expansion / contraction region is specified based on the fixing portion on the side facing the skin most.
  • the expansion / contraction region 7R located at the second end fixing portion 6B on the skin facing surface side of the dorsal fixing portion 6R is located at the second end fixing portion 6B on the skin facing surface side of the ventral fixing portion 6F.
  • the stretching stress is higher than that of the stretching region 7F.
  • the expansion shown in FIG. 7 is shown from the viewpoint that the stretching stress of the dorsal stretching region 7R is higher than the stretching stress of the ventral stretching region 7F, and the leakage-proof cuff 6 easily stands up along the inguinal region in the ventral region F.
  • the length Lf5 of the first end fixing portion 6A in the ventral side F in the longitudinal direction X is longer than the length Lf6 of the second end fixing portion 6B in the longitudinal direction X.
  • the length of the end fixing portion in the longitudinal direction X means the longest length of the end fixing portion in the longitudinal direction X.
  • the length Lf5 with respect to the length Lf6 is preferably 1.3 times or more, more preferably 1.5 times or more, more preferably 3.0 times or less, and 2.5 times or less. It is more preferably 1.3 times or more and 3.0 times or less, and further preferably 1.5 times or more and 2.5 times or less.
  • the length Lf5 of the ventral portion F is preferably 30 mm or more, more preferably 35 mm or more, more preferably 70 mm or less, further preferably 65 mm or less, and 30 mm or more and 70 mm or less. It is preferably 35 mm or more and 65 mm or less.
  • the length Lf6 of the ventral portion F is preferably 10 mm or more, more preferably 15 mm or more, more preferably 50 mm or less, further preferably 45 mm or less, and 10 mm or more and 50 mm or less. It is preferably 15 mm or more and 45 mm or less.
  • the length Lr6 of the second end portion fixing portion 6B in the longitudinal direction X is longer than the length Lr5 of the first end portion fixing portion 6A in the longitudinal direction X.
  • the length Lr6 with respect to the length Lr5 is preferably 1.3 times or more, more preferably 1.5 times or more, more preferably 3.0 times or less, and 2.5 times or less.
  • the length Lr5 of the dorsal portion R is preferably 30 mm or more, more preferably 35 mm or more, more preferably 70 mm or less, further preferably 65 mm or less, and 30 mm or more and 70 mm or less. It is preferably 35 mm or more and 65 mm or less.
  • the length Lr6 of the dorsal portion R is preferably 35 mm or more, more preferably 40 mm or more, more preferably 120 mm or less, further preferably 110 mm or less, and 35 mm or more and 120 mm or less. It is preferably 40 mm or more and 110 mm or less.
  • each part of the diaper 1 of the present embodiment materials usually used in the technical field can be used without particular limitation.
  • the surface sheet 5 various non-woven fabrics, perforated films, and the like can be used.
  • the leak-proof sheet 7 include a liquid-impermeable film, a spunbond, a meltblown, and a spunbond laminated non-woven fabric.
  • each elastic member thread rubber or the like can be used.
  • Various non-woven fabrics can be used as the exterior body forming sheets 31 and 32.
  • the absorbent core 40 of the absorber 4 overlapping the ventral stretchable region 7F in the thickness direction has higher rigidity than the absorbent core 40 of the absorber 4 overlapping the dorsal stretchable region 7R in the thickness direction.
  • the rigidity of the absorbent core 40 can be adjusted, for example, by changing the basis weight of the absorbent core 40.
  • the ventral elastic region 7F is preferably formed of an elastic sheet.
  • the stretchable sheet referred to in the present invention means that the length can be extended to 110 or more when the sheet is pulled in a predetermined direction when the length in the natural state is 100, and when the tensile force is released. A sheet whose length shrinks to 110 or less.
  • the elastic sheet used in the present invention for example, a substantially inelastic inelastic fiber layer is arranged on at least one surface of an elastic fiber layer made of an elastic resin as a raw material, and heat melting is performed while maintaining these fiber morphologies.
  • Laminated non-woven fabrics bonded by dressing, elastic sheets described in JP-A-2008-179128 and JP-A-2007-22066 can be used.
  • the elastic fiber a fiber made of a styrene-based elastomer, a polyolefin-based elastomer, a thermoplastic elastomer such as a polyester-based elastomer or a polyurethane-based elastomer, or an elastic resin such as rubber can be used.
  • the inelastic fiber a fiber made from the above-mentioned thermoplastic resin can be used.
  • the present invention has been described above based on the preferred embodiment, the present invention is not limited to the above embodiment and can be appropriately modified. Further, the above-described embodiments may be combined.
  • the embodiment shown in FIG. 1 relates to a pants-type disposable diaper 1 having an exterior body 3 extending over a ventral side F, a crotch part M, and a dorsal side R.
  • the present invention relates to a pants-type disposable diaper 1.
  • the exterior body is divided into a dorsal seat member arranged on the back side of the wearer and a ventral seat member arranged on the ventral side, and the dorsal seat member and the ventral seat member are joined by a pair of side seal portions.
  • It may be an exterior body split type pants-type disposable diaper that has a tubular shape and has an absorbent body that is bridged and fixed between the dorsal seat member and the ventral seat member.
  • the non-woven fabric 60 is folded in half to form the leak-proof cuff 6, but instead, the non-woven fabric is folded back only at the portion where the leak-proof cuff elastic member 63 is fixed, and other portions. Then, it may be a leak-proof cuff in the form of one piece of non-woven fabric.
  • a pants-type disposable diaper having an opening and having a longitudinal direction corresponding to the front-back direction of the wearer and a width direction orthogonal to the longitudinal direction.
  • the exterior body has a widthwise expansion and contraction region in which elastic members are arranged along the width direction on the ventral side and the dorsal side.
  • the absorbent body is provided with leak-proof cuffs extending along the longitudinal direction on both sides of the longitudinal direction, and the leak-proof cuff has a free end and an other end at one end in the width direction.
  • the leak-proof cuff has a free-end telescopic portion in which a leak-proof cuff elastic member is fixed to the free end portion along the longitudinal direction, and ends fixed to the surface sheet in the vicinity of both ends in the longitudinal direction.
  • the compressive load value in the width direction of the non-woven fabric between the free end telescopic portion and the fixed end portion is 5 cN or less.
  • the widthwise expansion / contraction region includes a dorsal side fixing portion which is the end portion fixing portion on the dorsal side side, and a dorsal side expansion / contraction region which is a region extending outward from the dorsal side fixing portion in the width direction. It includes a ventral fixing portion which is the end fixing portion on the ventral side, and has a ventral telescopic region which is a region extending outward in the width direction from the ventral fixing portion.
  • the stretch stress of the dorsal stretch region with respect to the stretch stress of the ventral stretch region is 1.04 times or more and 2.0 times or less, preferably 1.05 times or more and 1.8 times or less, according to the above ⁇ 1>.
  • the stretch stress of the dorsal stretch region is 0.8 cN / mm or more and 7.0 cN / mm or less, preferably 1.0 cN / mm or more and 6.0 cN / mm or less, according to ⁇ 1> or ⁇ 2>.
  • the exterior body has a ventral low stretch stress region having a lower stretch stress than the ventral stretch region at a portion located on the waist end side of the ventral stretch region, and the dorsal stretch region.
  • the stretch stress of the ventral stretch region with respect to the stretch stress of the ventral low stretch stress region is 1.04 times or more and 2.0 times or less, preferably 1.05 times or more and 1.8 times or less.
  • the stretch stress of the dorsal stretch region with respect to the stretch stress of the dorsal low stretch stress region is 1.1 times or more and 2.0 times or less, preferably 1.15 times or more and 1.8 times or less. > Or the disposable diaper according to ⁇ 6>.
  • ⁇ 8> The disposable diaper according to any one of ⁇ 1> to ⁇ 7>, wherein the ventral fixing portion has a shorter length along the longitudinal direction than the dorsal fixing portion.
  • the length of the dorsal fixing portion in the longitudinal direction with respect to the length of the ventral fixing portion in the longitudinal direction is 1.1 times or more and 2.0 times or less, preferably 1.2 times or more and 1.8 times or less.
  • ⁇ 10> The disposable diaper according to any one of ⁇ 1> to ⁇ 9>, wherein the length of the ventral fixing portion in the longitudinal direction is 30 mm or more and 65 mm or less, preferably 35 mm or more and 60 mm or less.
  • ⁇ 11> The disposable diaper according to any one of ⁇ 1> to ⁇ 10>, wherein the length of the dorsal fixing portion in the longitudinal direction is 40 mm or more and 70 mm or less, preferably 45 mm or more and 65 mm or less.
  • ⁇ 12> The distance from the ventral waist end to the crotch-side end of the ventral-fixed portion is from the dorsal-side waist end to the crotch-side end of the dorsal-fixed portion.
  • the disposable diaper according to any one of ⁇ 1> to ⁇ 11> which is shorter than the distance to the portion.
  • ⁇ 13> From the dorsal waist end to the crotch-side end of the ventral fixation portion with respect to the distance from the ventral waist end to the crotch-side end of the ventral fixation portion.
  • the disposable diaper according to any one of ⁇ 1> to ⁇ 12>, wherein the distance to the diaper is 1.05 times or more and 1.5 times or less, preferably 1.1 times or more and 1.4 times or less.
  • the distance from the waist end on the ventral side to the end on the crotch side of the ventral fixing portion is 50 mm or more and 105 mm or less, preferably 55 mm or more and 100 mm or less, said ⁇ 1> to ⁇ 13>.
  • the disposable diaper according to any one of.
  • the distance from the waist end on the dorsal side to the end on the crotch side of the dorsal fixing portion is 60 mm or more and 130 mm or less, preferably 65 mm or more and 120 mm or less.
  • the disposable diaper according to any one of. ⁇ 16> The distance from the waist end on the ventral side to the ventral end of the free end telescopic portion of the leak-proof cuff is from the waist end on the dorsal side to the leak-proof cuff.
  • the distance of the end telescopic portion to the end on the dorsal side is 1.05 times or more and 3.0 times or less, preferably 1.1 times or more and 2.5 times or less.
  • the distance from the waist end on the ventral side to the ventral end of the free end telescopic portion of the leak-proof cuff is 50 mm or more and 120 mm or less, preferably 55 mm or more and 110 mm or less.
  • ⁇ 21> The dorsal-side waist end to the dorsal-side fixed portion with respect to the distance from the dorsal-side waist end to the dorsal-side end of the free-end telescopic portion of the leak-proof cuff.
  • the distance to the end on the crotch side is 1.0 times or more and 1.4 times or less, preferably 1.05 times or more and 1.3 times or less, any one of ⁇ 1> to ⁇ 20>.
  • ⁇ 22> The distance from the waist end on the ventral side to the ventral end of the free end telescopic portion of the leak-proof cuff is from the waist end on the ventral side to the ventral fixed portion.
  • the disposable diaper according to any one of ⁇ 1> to ⁇ 21>, which is equal to or less than the distance to the end on the lower crotch side.
  • ⁇ 23> The ventral side of the waist end to the ventral end of the leak-proof cuff from the ventral waist end to the ventral end of the free end telescopic portion of the leak-proof cuff.
  • the distance to the end on the lower crotch side is 1.0 times or more and 1.7 times or less, preferably 1.05 times or more and 1.5 times or less, any one of ⁇ 1> to ⁇ 22>.
  • the listed disposable diapers. ⁇ 24> The distance from the ventral end of the absorbent body to the ventral end of the free end telescopic portion of the leak-proof cuff is the dorsal end of the absorbent body.
  • the distance from the leak-proof cuff to the end of the free-end telescopic portion on the dorsal side is 1.1 times or more and 2.0 times or less, preferably 1.2 times or more and 1.8 times or less.
  • the distance from the ventral end of the absorbent body to the ventral end of the free end telescopic portion of the leak-proof cuff is 25 mm or more and 70 mm or less, preferably 30 mm or more and 65 mm or less.
  • ⁇ 27> The distance from the dorsal end of the absorbent body to the dorsal end of the free end telescopic portion of the leakproof cuff is 30 mm or more and 80 mm or less, preferably 35 mm or more and 70 mm or less.
  • ⁇ 28> Of the above ⁇ 1> to ⁇ 27>, at least one of the ventral fixing portion and the dorsal fixing portion overlaps the elastic member arranged in the ventral telescopic region or the dorsal telescopic region in the thickness direction.
  • the disposable diaper according to any one. ⁇ 29> The ventral fixing portion overlaps the elastic member arranged in the ventral telescopic region in the thickness direction, and the dorsal fixing portion overlaps the elastic member arranged in the dorsal telescopic region in the thickness direction.
  • the leak-proof cuff at the lower crotch is wound on the non-skin facing surface side of the absorber and is located inward in the width direction from the side edge along the longitudinal direction of the absorber.
  • the leak-proof cuff at the lower crotch is joined to the surface sheet wound on the non-skin facing surface side of the absorber at a position inward in the width direction from the side edge along the longitudinal direction of the absorber.
  • the disposable diaper according to any one of ⁇ 1> to ⁇ 30>, which has a fixed end portion and the leak-proof cuff and the surface sheet are joined to each other on the non-skin facing surface side of the absorber. ..
  • ⁇ 32> The disposable diaper according to any one of ⁇ 1> to ⁇ 31>, wherein the leak-proof cuff and the surface sheet are joined on the non-skin facing surface side of the absorber.
  • the portion of the absorber that overlaps the ventral stretchable region in the thickness direction has higher rigidity than the portion of the absorber that overlaps the ventral stretchable region in the thickness direction, any one of ⁇ 1> to ⁇ 32>.
  • Disposable diapers listed in. ⁇ 34> The disposable diaper according to any one of ⁇ 1> to ⁇ 33>, wherein the non-woven fabric forming the leak-proof cuff has a bulk softness of 10 cN or less, preferably 8 cN or less, and preferably 3 cN or more.
  • the non-woven fabric forming the leak-proof cuff has an average deviation (SMD) of surface roughness of 2.2 ⁇ m or less, preferably 2.0 ⁇ m or less, and preferably 0.5 ⁇ m or more.
  • SMD average deviation
  • ⁇ 36> The disposable diaper according to any one of ⁇ 1> to ⁇ 35>, wherein the leakage-proof cuff has a deformation amount of 1 mm or more, preferably 1.1 mm or more when compressed at 1 kPa.
  • ⁇ 37> The disposable diaper according to any one of ⁇ 1> to ⁇ 36>, wherein the ventral stretchable region is formed of a stretchable sheet.
  • the leak-proof cuff has a bent portion obtained by folding the leak-proof cuff.
  • the bent portions are located at intervals inward in the width direction from the side edges along the longitudinal direction of the absorber.
  • the free end is located outward in the width direction with respect to the bent portion.
  • the ventral fixing portion and the dorsal fixing portion are the first end fixing portion in which the portion of the leak-proof cuff from the bent portion to the fixed end side is fixed on the surface sheet, and the bent portion, respectively. 4.
  • the length of the first end fixing portion in the longitudinal direction is longer than the length of the second end fixing portion in the longitudinal direction.
  • the length of the first end fixing portion in the longitudinal direction with respect to the length of the second end fixing portion in the longitudinal direction is 1.3 times or more and 3.0 times or less, preferably 3.0 times or less.
  • the disposable diaper according to ⁇ 38> or ⁇ 39> which is 1.5 times or more and 2.5 times or less.
  • the length of the second end fixing portion in the longitudinal direction is preferably 10 mm or more and 50 mm or less, more preferably 15 mm or more and 45 mm or less, the above ⁇ 38> to ⁇ . 41>
  • any one of ⁇ 38> to ⁇ 42> wherein the length of the second end fixing portion in the longitudinal direction is longer than the length of the first end fixing portion in the longitudinal direction.
  • Disposable diapers listed in. ⁇ 44> The length of the second end fixing portion in the longitudinal direction with respect to the length of the first end fixing portion in the longitudinal direction is 1.3 times or more and 3.0 times or less, preferably 1.5 times or more and 2.5 times.
  • the leak-proof cuff has a good standing property, leakage can be prevented, and the cuff mark is hard to be left.

Landscapes

  • 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)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2020/020516 2019-05-31 2020-05-25 使い捨ておむつ WO2020241561A1 (ja)

Priority Applications (1)

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JP2019103192A JP7283981B2 (ja) 2019-05-31 2019-05-31 使い捨ておむつ

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2023286523A1 (ja) * 2021-07-16 2023-01-19 花王株式会社 吸収性物品

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7366881B2 (ja) * 2020-12-28 2023-10-23 ユニ・チャーム株式会社 パンツ型使い捨ておむつ

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JP2003265529A (ja) * 2002-03-15 2003-09-24 Daio Paper Corp 使い捨て紙おむつ
JP2007044089A (ja) * 2005-08-05 2007-02-22 Kao Corp パンツ型使い捨ておむつ
JP2011224100A (ja) * 2010-04-19 2011-11-10 Daio Paper Corp パンツタイプおむつ
JP2012101063A (ja) * 2010-11-05 2012-05-31 Unicharm Corp 使い捨てオムツ
JP2013005879A (ja) * 2011-06-23 2013-01-10 Kao Corp 吸収性物品
JP2014050749A (ja) * 2013-11-13 2014-03-20 Daio Paper Corp パンツ型使い捨ておむつ
JP2015116471A (ja) * 2013-11-15 2015-06-25 花王株式会社 パンツ型吸収性物品
JP2016005545A (ja) * 2014-05-30 2016-01-14 花王株式会社 使い捨ておむつ
JP2018064869A (ja) * 2016-10-21 2018-04-26 大王製紙株式会社 パンツタイプ使い捨ておむつ
JP2019037814A (ja) * 2018-11-01 2019-03-14 ユニ・チャーム株式会社 吸収性物品

Patent Citations (10)

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Publication number Priority date Publication date Assignee Title
JP2003265529A (ja) * 2002-03-15 2003-09-24 Daio Paper Corp 使い捨て紙おむつ
JP2007044089A (ja) * 2005-08-05 2007-02-22 Kao Corp パンツ型使い捨ておむつ
JP2011224100A (ja) * 2010-04-19 2011-11-10 Daio Paper Corp パンツタイプおむつ
JP2012101063A (ja) * 2010-11-05 2012-05-31 Unicharm Corp 使い捨てオムツ
JP2013005879A (ja) * 2011-06-23 2013-01-10 Kao Corp 吸収性物品
JP2014050749A (ja) * 2013-11-13 2014-03-20 Daio Paper Corp パンツ型使い捨ておむつ
JP2015116471A (ja) * 2013-11-15 2015-06-25 花王株式会社 パンツ型吸収性物品
JP2016005545A (ja) * 2014-05-30 2016-01-14 花王株式会社 使い捨ておむつ
JP2018064869A (ja) * 2016-10-21 2018-04-26 大王製紙株式会社 パンツタイプ使い捨ておむつ
JP2019037814A (ja) * 2018-11-01 2019-03-14 ユニ・チャーム株式会社 吸収性物品

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Publication number Priority date Publication date Assignee Title
WO2023286523A1 (ja) * 2021-07-16 2023-01-19 花王株式会社 吸収性物品

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TW202106270A (zh) 2021-02-16
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CN216535789U (zh) 2022-05-17

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