WO2022097551A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
- Publication number
- WO2022097551A1 WO2022097551A1 PCT/JP2021/039657 JP2021039657W WO2022097551A1 WO 2022097551 A1 WO2022097551 A1 WO 2022097551A1 JP 2021039657 W JP2021039657 W JP 2021039657W WO 2022097551 A1 WO2022097551 A1 WO 2022097551A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- region
- width direction
- absorbent article
- length
- contraction length
- Prior art date
Links
- 230000002745 absorbent Effects 0.000 title claims abstract description 206
- 239000002250 absorbent Substances 0.000 title claims abstract description 206
- 230000008602 contraction Effects 0.000 claims abstract description 183
- 210000001015 abdomen Anatomy 0.000 claims abstract description 73
- 210000001364 upper extremity Anatomy 0.000 claims abstract description 32
- 230000003187 abdominal effect Effects 0.000 claims description 77
- 210000003141 lower extremity Anatomy 0.000 claims description 23
- 210000001217 buttock Anatomy 0.000 description 42
- 238000006073 displacement reaction Methods 0.000 description 29
- 238000010521 absorption reaction Methods 0.000 description 24
- 230000008859 change Effects 0.000 description 15
- 210000002414 leg Anatomy 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 10
- 239000006096 absorbing agent Substances 0.000 description 9
- 238000004904 shortening Methods 0.000 description 9
- 230000037237 body shape Effects 0.000 description 7
- 230000037303 wrinkles Effects 0.000 description 7
- 210000001124 body fluid Anatomy 0.000 description 6
- 239000010839 body fluid Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—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
Definitions
- the present invention relates to absorbent articles such as disposable diapers.
- Absorbent articles such as disposable diapers are attached so as to cover the abdomen and back of the body and are configured to suppress slippage (for example, Patent Document 1 below).
- the absorbent article of Patent Document 1 is configured so that the absorbent article does not easily shift with respect to the movement of the wearer's body.
- the rear waist circumference region is provided with a first expansion / contraction portion and a second expansion / contraction portion located on the inseam side of the first expansion / contraction portion.
- the first expansion / contraction portion and the second expansion / contraction portion are arranged at intervals in the longitudinal direction.
- the stretching stress of the first stretching portion and the stretching stress of the second stretching portion are larger than the stretching stress of the region between the first stretching portion and the second stretching portion. Therefore, when the absorbent article is worn, the first stretchable portion and the second stretchable portion are in close contact with the body, and the region between the first stretchable portion and the second stretchable portion is relatively in close contact with the body.
- the second elastic part located on the inseam area side in the rear waist circumference area is pulled toward the inseam side.
- the region between the first telescopic portion and the second telescopic portion is also pulled toward the inseam side.
- the region between the first stretchable portion and the second stretchable portion has a relatively small stretchable stress and is not in close contact with the body.
- the area between the first expansion / contraction portion and the second expansion / contraction portion becomes a cushioning region, and the movement of the body. It is possible to absorb the change in the expansion and contraction of the skin due to. Therefore, it is possible to prevent the first telescopic portion from shifting toward the inseam side. Further, the first expansion / contraction portion and the third expansion / contraction portion are continuous, and the second expansion / contraction portion and the third expansion / contraction portion are continuous.
- the stretchable portion in the front waist circumference area and the stretchable portion in the rear waist circumference region are arranged so as to cover the wearer's waist circumference. Therefore, when the second telescopic portion shifts to the inseam side, it can be pulled up to the original position by the third telescopic portion. In this way, the absorbent article of Patent Document 1 is configured to suppress displacement.
- the absorbent article includes an inseam region arranged between the longitudinal direction and the width direction orthogonal to each other, a front waist circumference region, a rear waist circumference region, and the front waist circumference region and the rear waist circumference region, and at least an inseam. It has an absorption core arranged in the region.
- the front girth area and the rear girth area are provided with a plurality of regions obtained by dividing the front girth area and the rear girth area in the longitudinal direction.
- the plurality of regions are a front waist region located 0 to 25% behind the total length of the front waist region in the longitudinal direction from the front end edge of the front waist region, and the front waist region from the front end edge of the front waist region.
- An upper abdominal region located 25 to 50% posterior to the longitudinal length of the anterior girth region and a lower abdominal region located 50 to 75% posterior to the longitudinal length of the anterior girth region from the front edge of the anterior girth region. It has a front leg region located 75 to 100% behind the total length of the front waist region in the longitudinal direction from the front end edge of the front waist region.
- the widthwise contraction length of the lower abdominal region is longer than the widthwise contraction length of the front leg region.
- FIG. 1 is a schematic front view of an absorbent article according to the present embodiment.
- FIG. 2 is a schematic plan view of the unfolded state of the absorbent article according to the present embodiment.
- FIG. 3 is a schematic cross-sectional view taken along the line of F3-F3 shown in FIG.
- FIG. 4 is a diagram schematically showing a state in which the absorbent article is attached to the wearer.
- the absorbent article includes an inseam region arranged between the longitudinal direction and the width direction orthogonal to each other, a front waist circumference region, a rear waist circumference region, and the front waist circumference region and the rear waist circumference region, and at least an inseam. It has an absorption core arranged in the region.
- the front girth area and the rear girth area are provided with a plurality of regions obtained by dividing the front girth area and the rear girth area in the longitudinal direction.
- the plurality of regions are a front waist region located 0 to 25% behind the total length of the front waist region in the longitudinal direction from the front end edge of the front waist region, and the front waist region from the front end edge of the front waist region.
- An upper abdominal region located 25 to 50% posterior to the longitudinal length of the anterior girth region and a lower abdominal region located 50 to 75% posterior to the longitudinal length of the anterior girth region from the front edge of the anterior girth region. It has a front leg region located 75 to 100% behind the total length of the front waist region in the longitudinal direction from the front end edge of the front waist region.
- the widthwise contraction length of the lower abdominal region is longer than the widthwise contraction length of the front leg region.
- the waist circumference of the wearer's abdomen has a short waist circumference near the dent at the lower end of the abdomen, and gradually increases from the dent at the lower end toward the inseam side.
- the region having a long shrinkage length has a long shrinkage length in the process of changing from the stretched state to the natural state, and the change due to the shrinkage is large. Since the contraction length of the lower abdominal region that abuts on the abdominal part with a short waist circumference (dent) is long and the contraction length of the front leg region that abuts on the bulging part rather than the dent is relatively short, the absorbent article itself is uneven on the body. It transforms into a shape that follows. By arranging a portion having a short size of the absorbent article in the dent of the body, the absorbent article is caught in the dent, and the displacement of the absorbent article can be suppressed.
- the contraction length of the lower abdominal region in the width direction is longer than the contraction length of the upper abdomen region in the width direction.
- the waist circumference of the wearer's abdomen is short near the dent at the lower end of the abdomen, and gradually increases from the dent at the lower end toward the upper side.
- the absorbent article since the contraction length of the lower abdomen region is long and the collection mm contraction length of the upper abdomen region and the front leg region abutting on the portion bulging from the dent is relatively short, the absorbent article itself follows the unevenness of the body. It transforms into a shape. By arranging a portion having a short size of the absorbent article in the dent of the body, the absorbent article is caught in the dent, and the displacement of the absorbent article can be suppressed.
- the contraction length of the upper abdominal region in the width direction is longer than the contraction length of the anterior waist region in the width direction.
- the waist circumference of the wearer's abdomen is short near the dent at the lower end of the abdomen, and gradually increases from the dent at the lower end toward the upper side.
- the waist circumference of the absorbent article naturally increases in the order of the lower abdominal region, the upper abdominal region, and the anterior waist region.
- the difference between the widthwise contraction length of the anterior waist region and the widthwise contraction length of the upper abdominal region is the widthwise contraction length of the upper abdominal region. It is smaller than the difference in the contraction length in the width direction of the lower abdominal region.
- the rate of change in the waist circumference of the wearer's abdomen is not constant and varies. More specifically, the rate of change in the waist circumference dimension on the ventral side of the wearer is F12-F11 ⁇ F13-F12.
- the shape of the absorbent article is more suitable for the shape of the body, and the displacement of the absorbent article can be suppressed.
- the contraction length of the upper abdominal region in the width direction is longer than the contraction length of the front leg region in the width direction.
- the front leg area is an area in which the base of the foot is arranged and is easy to move following the movement of the foot. According to this aspect, since the contraction length of the front leg region is relatively short, it is possible to secure the length in the width direction of the front leg region in the wearing state and improve the wearing feeling without hindering the movement of the base of the foot.
- the contraction length of the lower abdominal region in the width direction is longer than the contraction length of any region of the anterior waist circumference region.
- the contraction length of the lower abdominal region that abuts on the portion (recess) having a short waist circumference in the abdomen is long, and the absorbent article is easily caught in the recess, and the displacement of the absorbent article can be suppressed.
- the plurality of regions are a rear waist region located 0 to 25% ahead of the total length of the rear waist region in the longitudinal direction from the rear end edge of the rear waist region, and the rear waist region.
- the upper dorsal region located 25 to 50% in front of the total length of the rear girth region in the longitudinal direction from the rear end edge, and 50 to 50 to the total length in the longitudinal direction of the rear girth region from the rear end edge of the rear girth region. It has a lower dorsal region located 75% anterior and a hind leg region located 75-100% anterior to the longitudinal length of the posterior girth region from the posterior edge of the posterior girth region.
- the widthwise contraction length of the upper dorsal region is longer than the widthwise contraction length of the posterior waist region.
- the waist circumference becomes shorter as the distance from the bulge of the buttocks to the upper side.
- the upper back region corresponds to the portion above the apex of the bulge of the buttocks
- the posterior waist region corresponds to the vicinity of the waist (the thinnest part of the torso).
- the change in the waist circumference gradually decreases from the apex of the bulge of the buttocks toward the upper side, and in the vicinity of the waist, there is almost no bulge to the outside of the body and the shape is flat.
- the absorbent article Since the contraction length of the upper back region is longer than the contraction length of the back waist region, the absorbent article itself deforms into a shape along the unevenness of the body from the bulge of the buttocks to the upper side in the back, and the absorbent article shifts. Can be suppressed.
- the contraction length of the upper back region since the contraction length of the upper back region is relatively long, the waist circumference dimension of the upper back region becomes short when worn, and it fits into the dent on the upper side of the bulge of the buttocks, and the displacement of the absorbent article can be suppressed.
- the contraction length of the rear waist region, which hits the flat-shaped portion near the waist is short, and the waist circumference around the waist can be secured when worn. Therefore, it is possible to prevent the rear waist region from slipping down to the inseam side due to contraction.
- the contraction length of the upper back region in the width direction is longer than the contraction length of the lower back region in the width direction.
- the lower back area is arranged so as to cover the apex of the bulge of the buttocks. It is possible to secure the length in the width direction of the lower back region, and it is possible to improve the wearing feeling without pressing the bulge of the buttocks too much.
- the absorbent article is caught in the depression above the apex of the buttock bulge, and the absorbent article slips down. Can be suppressed. That is, the absorbent article itself is deformed into a shape along the unevenness of the body from the bulge of the buttocks to the upper side in the back portion, and the displacement of the absorbent article can be suppressed.
- the contraction length of the hind leg region in the width direction is shorter than the contraction length of the lower back region in the width direction.
- the contraction length of the hind leg region is short, and the length in the width direction of the hind girth region can be secured toward the inseam region side. Therefore, it is possible to suppress the shrinkage of the absorption core and secure the absorption performance of the body fluid.
- by suppressing the shrinkage of the absorption core it is possible to suppress the occurrence of unintended wrinkles in the absorption core, and the absorption performance of body fluid deteriorates due to the continuous unintended wrinkles on the inseam region side. Can be suppressed. Since the contraction length of the hind leg region is relatively short, it is possible to secure the length in the width direction of the hind leg region in the wearing state and improve the wearing feeling without hindering the movement of the base of the foot.
- the difference between the contraction length of the upper back region and the contraction length of the lower back region is larger than the difference between the contraction length of the upper back region and the contraction length of the posterior waist region. .. From the apex of the bulge of the buttocks where the lower back region is arranged to the upper side of the bulge where the upper back region is arranged, the change rate of the waist circumference is high, and the change rate of the waist circumference is particularly high at the time of bending. According to this aspect, the difference between the contraction length of the upper back region and the contraction length of the lower back region is large, and it becomes easier to follow the shape of the body.
- the contraction length of the posterior waist region is longer than the contraction length of the lower back region.
- the waist circumference near the waist to which the rear waist region is applied is shorter than the waist circumference of the bulging portion of the buttocks to which the lower back region is applied.
- the contraction length of the upper back region in the width direction is longer than the contraction length of any region of the rear waist circumference region. According to this aspect, by shortening the waist circumference dimension of the upper back region applied to the upper side of the buttock bulge, even if the rear waist circumference region is pulled toward the inseam side, the upper back region is caught on the upper side of the buttock bulge. It is possible to suppress slippage.
- the difference between the longest contraction length and the shortest contraction length in the rear waist circumference region is larger than the difference between the longest contraction length and the shortest contraction length in the front waist circumference region.
- the dorsal side is more likely to expand and contract than the ventral side during movements such as bending and stretching the wearer's legs. If the shape of the absorbent article itself is displaced with respect to the unevenness of the body, the absorbent article is more likely to be displaced during operation. According to this aspect, by realizing the shape of the absorbent article along the unevenness of the body, the followability of the absorbent article during operation is improved, and the displacement can be suppressed.
- the tensile stress in the width direction of the rear waist region is higher than the tensile stress of the upper back region.
- the posterior waist region has a higher tensile stress and a higher pressure on the body as compared with the upper back region.
- the posterior waist region has a shorter contraction length and a smaller contraction amount than the upper back region, and it is easy to keep the position with respect to the body. Since the rear waist region is less displaced and the wearing pressure is high, it is possible to suppress the formation of a gap between the back waist opening and the wearer during the wearer's movement.
- FIG. 1 is a schematic front view of an absorbent article according to the present embodiment.
- FIG. 2 is a schematic plan view of the unfolded state of the absorbent article according to the present embodiment.
- FIG. 2 shows an extended state in which the absorbent article 1 is extended to a state in which wrinkles are not formed in a state where the side joint portion to be described later is released from the joint.
- FIG. 3 is a schematic cross-sectional view of the absorbent article along line F3-F3 in FIG.
- some members are not shown. Further, for convenience of explanation, even if the members are separated in the thickness direction, they may be in contact with each other in the thickness direction in an actual product.
- the absorbent article 1 is, for example, a pants-type disposable diaper, a tape-type disposable diaper, a shorts-type sanitary napkin, or the like.
- the absorbent article 1 of the embodiment is a pants-type disposable diaper.
- the absorbent article 1 has a longitudinal direction L and a width direction W orthogonal to the longitudinal direction L.
- the longitudinal direction L is a direction extending to the front side of the body and the back side of the body.
- the absorbent article 1 has orthogonal thickness directions T in both the longitudinal direction L and the width direction W.
- the thickness direction T extends to the skin surface side T1 facing the wearer side and the non-skin surface side T2 opposite to the skin surface side.
- the absorbent article 1 is arranged in the front waist area S1 arranged on the ventral side of the wearer, the rear waist area S2 arranged on the back side of the wearer, and the inseam of the wearer, and the front waist area S1 and the rear. It has an inseam region S3 arranged between the waist circumference regions.
- the absorbent article 1 may have a side joint portion 16 for joining the outer portion of the front waist circumference region S1 and the outer portion of the rear waist circumference region S2.
- the absorbent article 1 has a pair of waist openings 17 through which the wearer's torso is passed and a pair of legs into which the wearer's legs are inserted.
- the leg circumference opening 18 is formed.
- the waist opening 17 may be defined by the front end edge S1F of the front waist circumference region S1 and the rear end edge S2R of the rear waist circumference region S2.
- the inseam region S3 may be defined by the inner edge of the side joint 16 in the longitudinal direction L.
- the boundary between the front waist circumference region S1 and the inseam region S3 may be defined by the rear end edge 16R of the side joint portion 16 in the front waist circumference region S1.
- the boundary between the rear waist circumference region S2 and the inseam region S3 may be defined by the front end edge 16F of the side joint portion 16 in the rear waist circumference region S2.
- the inseam region S3 may be defined by the region provided with the leg circumference opening 18.
- the leg circumference opening 18 is a portion recessed inward in the width direction W from the outer edge of the absorbent article 1.
- the boundary between the front waist area S1 and the inseam area S3 may be defined by the front end edge of the leg circumference opening 18.
- the boundary between the rear waist area S2 and the inseam area S3 may be defined by the rear end edge of the leg circumference opening 18.
- the outer portion in the present specification is a portion that occupies a certain range in the width direction W including the outer edge in the width direction W, and the outer edge is an outer edge in the width direction W.
- the inner portion in the present specification is a portion that occupies a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is an inner edge in the width direction W.
- the front end portion and the rear end portion in the present specification are portions that occupy a certain range in the longitudinal direction L including the edge in the longitudinal direction L, and the front end edge and the rear end edge are edges in the longitudinal direction L.
- the outer end includes a front end and a rear end, and the outer edge includes a front end edge and a rear end edge.
- the absorbent article 1 may have an absorbent body 20 and an exterior body 50.
- the absorbent body 20 may be configured as a separate body from the exterior body 50.
- the absorbent body 20 is arranged at least in the inseam region S3.
- the absorbent body 20 may extend from the inseam area S3 to at least the front waist area S1 in the longitudinal direction L, or may extend over the front waist area S1, the rear waist area S2, and the inseam area S3.
- the absorbent main body 20 overlaps the exterior body 50 in the thickness direction T in the front waist circumference region S1 and the rear waist circumference region S2.
- the exterior body 50 is arranged at least in the front waist circumference region S1 and the rear waist circumference region S2.
- the absorbent main body 20 may have an absorbent body 30, a front surface sheet 41, a back surface sheet 42, and a side sheet 47.
- the absorber 30 has at least an absorption core 31 containing an absorbent material.
- the absorbent material may include, for example, ground pulp or a highly absorbent polymer (SAP), or a mixture thereof.
- the absorption core 31 is arranged at least in the inseam region S3, and may extend from the front waist circumference region S1 to the rear waist circumference region S2.
- the absorber 30 may have a core wrap 32 that covers the absorption core 31.
- the core wrap 32 may be made of, for example, a tissue or a non-woven fabric.
- the absorber 30 may have a low basis weight portion LR in which the basis weight of the absorbent material is lower than that of the surroundings.
- the absorption core 31 is not arranged and the core wrap 32 is arranged in the low basis weight portion LR in the thickness direction T. Therefore, the basis weight of the absorbent material of the low basis weight portion LR is 0.
- the basis weight of the absorption material may be 0 as long as it is substantially 0, and the absorption core 31 may not be substantially present in the low basis weight portion LR. A part of the surrounding absorption core 31 may flow into the low basis weight portion LR.
- the surface sheet 41 is located on the skin surface side T1 of the absorber 30. At least a portion of the surface sheet 41 (eg, the portion not covered by the side sheet 47) is located closest to the skin surface side T1 of the absorbent article and abuts on the wearer's skin.
- the surface sheet 41 may have liquid permeability, and may be made of, for example, a non-woven fabric.
- the back sheet 42 is located on the non-skin surface side T2 of the absorber 30.
- the back sheet 42 may have liquid impermeable properties, and may be made of, for example, a film.
- the side sheet 47 is arranged outside the width direction W of the absorption core 31 with respect to the center of the width direction W.
- the side sheet 47 may be arranged on the skin surface side T1 of the surface sheet.
- the side sheet 47 may be made of, for example, a non-woven fabric.
- the exterior body 50 may be arranged on the non-skin surface side T2 of the absorbent body 20.
- the exterior body 50 may be composed of a plurality of seat members.
- the plurality of sheet materials may be composed of, for example, a non-woven fabric.
- the exterior body of the front waist circumference region S1 and the exterior body of the rear waist circumference region S2 may be separated from each other in the longitudinal direction L.
- the exterior body 50 may have a waist elastic member 55 arranged in a state of being extended in the width direction W in the front waist circumference region S1 and the rear waist circumference region S2.
- the waist elastic member 55 may be composed of a thread-shaped or string-shaped elastic member extending in the width direction W, or may be composed of a sheet-shaped elastic member.
- the absorbent article 1 of the present embodiment is configured to be able to suppress the slippage of the absorbent article 1.
- the front waist circumference area S1 and the rear waist circumference region S2 are provided with a plurality of regions obtained by dividing the front waist circumference region S1 and the rear waist circumference region S2 in the longitudinal direction L. Each region is configured to have an appropriate contraction length. Each region is deformed in a different manner depending on the difference in shrinkage length, and the absorbent article 1 is configured to be difficult to slip down.
- the plurality of regions are the front waist region F11 located 0 to 25% behind the total length of the front waist region S1 in the longitudinal direction L from the front end edge S1F of the front waist region S1, and the front waist region S1F to the front waist circumference of the front waist region S1.
- the upper abdominal region F12 located 25 to 50% behind the total length of the longitudinal region L of the region S1 and 50 to 75% posterior to the total length of the longitudinal region L of the anterior girth region S1 from the front edge S1F of the anterior girth region S1.
- Each region in the shrinkage length is a region of the entire absorbent article 1 (a region in which the exterior body 50 and the absorbent main body 20 are combined).
- the measurement of the contraction length in the width direction W of each region can be obtained by the following method.
- the absorbent article 1 was left in an environment of a temperature of 23 ° C. ⁇ 2 ° C. and a humidity of 50% ⁇ 5% for 2 hours, and then the absorbent article 1 was stretched until wrinkles disappeared.
- the boundary of the region of the rear waist circumference region S2 is marked, and the length of each region in the width direction W is measured.
- the length W in the width direction of each region is the length between the inner edges of the side joint.
- the absorbent article 1 having the side joint portion 16 tears the side joint portion 16 to separate the front waist circumference region S1 and the rear waist circumference region S2.
- the test piece is obtained by cutting each region without releasing the joining. Place the test piece on a table and leave it for 60 minutes to let the test piece in its natural state. Next, a 5 mm acrylic plate is placed on the test piece, the test piece is sandwiched between the table and the acrylic plate, and the length of the test piece in the width direction is measured.
- Table 1 shows the measurement data of the shrinkage length obtained in the absorbent article 1 according to Example 1 and Example 2.
- FIG. 4 is a diagram schematically showing a state in which the absorbent article 1 is attached to the wearer.
- FIG. 4 is a diagram showing a mounting state on the side surface side in a standing state.
- the line of the wearer's body is indicated by the alternate long and short dash line BL.
- the wearer's body shape differs between the ventral side and the dorsal side, and the waist circumference size changes in the longitudinal direction L of the absorbent article 1.
- the waist circumference of the wearer's abdomen has a short waist circumference near the dent at the lower end of the abdomen, and gradually increases from the dent at the lower end toward the inseam side.
- the region having a long contraction length has a long contraction length in the process of changing from the extended state to the natural state (a state in which the wearing assistant or the like removes the tensile force in the width direction), and the change due to the contraction. Is big. Therefore, in the absorbent article 1, the region having a long contraction length has a short dimension along the waistline in the worn state, and easily fits to a recessed portion of the body.
- the contraction length of the lower abdominal region F13 in the width direction W is longer than the contraction length of the front leg region F14 in the width direction W. That is, the relationship of shrinkage length satisfies F13> F14.
- the absorbent article 1 Since the contraction length of the lower abdominal region F13 that abuts on the portion (recess) having a short waist circumference in the abdomen is long and the contraction length of the front leg region F14 that abuts on the portion that swells rather than the dent is relatively short, the absorbent article 1 itself It transforms into a shape that follows the unevenness of the body. By arranging a portion having a short size of the absorbent article 1 in the recess of the body, the absorbent article 1 is caught in the recess, and the displacement of the absorbent article 1 can be suppressed.
- the contraction length of the lower abdominal region F13 in the width direction W may be longer than the contraction length of the upper abdomen region F12 in the width direction W. That is, the relationship of shrinkage length may satisfy F13> F12.
- the waist circumference of the wearer's abdomen is short near the dent at the lower end of the abdomen, and gradually increases from the dent at the lower end toward the upper side. Since the contraction length of the lower abdominal region F13 is long and the contraction length of the upper abdominal region F12 and the front leg region F14 that abut on the portion bulging from the dent is relatively short, the absorbent article 1 itself is deformed into a shape that follows the unevenness of the body. ..
- the absorbent article 1 By arranging a portion of the absorbent article 1 having a short dimension in a recess of the body, the absorbent article 1 is caught in the recess, and the displacement of the absorbent article 1 can be suppressed. Further, if the contraction length of the upper abdomen region F12 is longer than the contraction length of the lower abdomen region F13, the portion swelled by the upper abdomen region F12 may be compressed or the upper abdomen region F12 may shift to the concave side of the abdomen. There is a risk of malfunction. However, when the absorbent article 1 follows the shape of the body, the defect can be suppressed.
- the contraction length of the upper abdominal region F12 in the width direction W may be longer than the contraction length of the front waist region F11 in the width direction W. That is, the relationship of shrinkage length may satisfy F12> F11.
- the waist circumference of the wearer's abdomen is short near the dent at the lower end of the abdomen, and gradually increases from the dent at the lower end toward the upper side.
- the waist circumference of the absorbent article 1 in the natural state increases in the order of the lower abdominal region F13, the upper abdominal region F12, and the anterior waist region F11.
- the vicinity of the navel where the front waist region F11 is arranged is a portion that is easy to move when the legs are bent and stretched.
- the absorbent article 1 is in close contact with the body and the movement of the absorbent article 1 due to the absorbent article 1 following the movement of the body too much is suppressed. It is possible to suppress the sagging of the absorbent article 1.
- the difference between the contraction length of the anterior waist region F11 in the width direction W and the contraction length of the upper abdomen region F12 in the width direction W is the contraction length of the upper abdomen region F12 in the width direction W and the contraction length of the lower abdomen region F13 in the width direction W. It may be smaller than the difference. That is, the relationship of shrinkage length may satisfy F12-F11 ⁇ F13-F12.
- the rate of change in the waist circumference of the wearer's abdomen is not constant and varies. More specifically, the rate of change in the waist circumference dimension on the ventral side of the wearer is F12-F11 ⁇ F13-F12. According to this aspect, the shape of the absorbent article is more suitable for the shape of the body, and the displacement of the absorbent article can be suppressed.
- the contraction length of the upper abdominal region F12 in the width direction W may be longer than the contraction length of the front leg region F14 in the width direction W. That is, the relationship of shrinkage length may satisfy F12> F14.
- the front leg region F14 is a region in which the base of the foot is arranged and is easy to move following the movement of the foot. By making the contraction length of the front leg region F14 relatively short, it is possible to secure the length of the front leg region F14 in the width direction in the wearing state and improve the wearing feeling without hindering the movement of the base of the foot.
- the contraction length of the front leg region F14 in the width direction W may be shorter than the contraction length of any region of the front waist circumference region S1.
- the relationship of shrinkage length may satisfy F14 ⁇ F11, F14 ⁇ F12, F14 ⁇ F13. Since the contraction length of the front leg region F14 in the width direction W is short, the movement of the foot is not hindered and the wearing feeling can be further improved.
- the contraction length of the lower abdominal region F13 in the width direction W may be longer than the contraction length of any region of the front waist circumference region S1. That is, the relationship of shrinkage length may satisfy F13> F11, F13> F12, and F13> F14.
- the waist circumference of the wearer's abdomen the waist circumference near the dent at the lower end of the abdomen is the shortest.
- the contraction length of the lower abdominal region F13 that abuts on the portion (recess) having a short waist circumference in the abdomen is long, and the absorbent article is easily caught in the recess, and the displacement can be suppressed.
- the waist circumference becomes shorter as the distance from the bulge of the buttocks to the upper side.
- the apex of the buttock bulge is covered by the lower back region R13.
- the portion covered by the upper back region R12 and the posterior waist region R11 is recessed more than the portion covered by the lower back region R13.
- the contraction length of the upper back region R12 in the width direction W may be longer than the contraction length of the lower back region R13 in the width direction. That is, the relationship of shrinkage length may satisfy R12> R13.
- the lower back region R13 is arranged so as to cover the apex of the bulge of the buttocks.
- the length of the lower back region R13 in the width direction W can be secured, and the wearing feeling can be improved without pressing the bulge of the buttocks too much. Further, by shortening the length of the natural width direction W of the upper back region R12 located above the apex of the buttock bulge, the absorbent article 1 is caught in the portion above the apex of the buttock bulge. It is possible to suppress the slippage of the absorbent article 1. That is, the absorbent article 1 itself is deformed into a shape along the unevenness of the body from the bulge of the buttocks to the upper side in the back portion, and the displacement of the absorbent article 1 can be suppressed.
- the vicinity of the apex of the buttocks where the lower back region R13 is arranged is a portion that is easy to move when the foot is bent and stretched. By shortening the contraction length of the region covering the easily moving portion, it is possible to suppress the movement of the absorbent article due to the absorbent article following the movement of the body too much, and to suppress the sagging of the absorbent article.
- the lower dorsal region R13 is arranged to face the discharged stool. If the contraction length of the lower back region R13 is long, the stool may be in close contact with the body and the wearing feeling may be deteriorated. However, the lower back region R13 has a relatively short contraction length and does not come into close contact with the body. Therefore, the discharged stool can be continuously accommodated without being in close contact with the body, and deterioration of the wearing feeling can be suppressed.
- the contraction length in the width direction of the upper back region R12 may be longer than the contraction length in the width direction of the rear waist region R11. That is, the relationship of shrinkage length may satisfy R12> R11.
- the waist circumference becomes shorter as the distance from the bulge of the buttocks to the upper side.
- the upper back region R12 corresponds to a portion above the apex of the bulge of the buttocks
- the rear waist region R11 corresponds to the vicinity of the waist (the thinnest portion of the torso).
- the change in the waist circumference gradually decreases from the apex of the bulge of the buttocks toward the upper side, and in the vicinity of the waist, there is almost no bulge to the outside of the body and the shape is flat. Since the contraction length of the upper back region R12 is longer than the contraction length of the rear waist region R11, the absorbent article 1 itself is deformed into a shape along the unevenness of the body from the bulge of the buttocks to the upper side in the back, and is absorbent. The deviation of the article 1 can be suppressed.
- the contraction length of the upper back region R12 is relatively long, the waist circumference dimension of the upper back region becomes short when worn, and it fits into the dent on the upper side of the bulge of the buttocks, and the displacement of the absorbent article can be suppressed.
- the contraction length of the rear waist region, which hits the flat-shaped portion near the waist is short, and the waist circumference around the waist can be secured when worn. Therefore, it is possible to prevent the rear waist region from slipping down to the inseam side due to contraction.
- the contraction length of the hind leg region R14 in the width direction may be shorter than the contraction length of the lower back region R13 in the width direction. That is, the relationship of shrinkage length may satisfy R14 ⁇ R13.
- the contraction length of the hind leg region R14 is short, and the length in the width direction of the rear waist circumference region S2 can be secured toward the inseam region S3 side. Therefore, it is possible to suppress the shrinkage of the absorption core 31 and secure the absorption performance of the body fluid.
- by suppressing the shrinkage of the absorption core 31 it is possible to suppress the occurrence of unintended wrinkles in the absorption core 31, and the absorption performance of body fluid due to the continuous unintended wrinkles on the inseam region S3 side.
- the hind leg region R14 is a region in which the base of the foot is arranged and is easy to move following the movement of the foot.
- the contraction length of the hind leg region R14 in the width direction W may be shorter than the contraction length of any region of the rear waist circumference region S2. That is, the relationship of shrinkage length may satisfy R14 ⁇ R11, R14 ⁇ R12, R14 ⁇ R13.
- the hind leg region R14 is a region in which the base of the foot is arranged and is easy to move following the movement of the foot. By shortening the contraction length of the hind leg region R14, the wearing feeling can be improved without hindering the movement of the base of the foot.
- the difference between the contraction length of the upper back region R12 and the contraction length of the lower back region R13 may be larger than the difference between the contraction length of the upper back region R12 and the contraction length of the posterior waist region R11. That is, the relationship of shrinkage length may satisfy R12-R13> R12-R11.
- the waist circumference of the wearer's back varies from the apex of the buttock bulge to the upward bulge. From the apex of the bulge of the buttocks where the lower back region R13 is arranged to the upper side of the bulge where the upper back region R12 is arranged, the rate of change in the waist circumference is high, and the rate of change in the waist circumference during bending is particularly high.
- the difference between the contraction length of the upper back region R12 and the contraction length of the lower back region R13 is large, and it becomes easier for the absorbent article to follow the shape of the body.
- the contraction length of the rear waist region R11 may be longer than the contraction length of the lower back region R13. That is, the relationship of shrinkage length may satisfy R11> R13.
- the waist circumference dimension near the waist to which the rear waist region R11 is applied is shorter than the waist circumference dimension of the bulging portion of the buttocks to which the lower back region R13 is applied.
- the contraction length of the upper back region R12 in the width direction may be longer than the contraction length of any region of the rear waist circumference region S2. That is, the relationship of shrinkage length may satisfy R12> R11, R12> R13, and R12> R14.
- the difference between the longest contraction length and the shortest contraction length in the rear waist circumference region S2 may be larger than the difference between the longest contraction length and the shortest contraction length in the front waist circumference region S1.
- the difference between the contraction length of the upper back region R12 having the longest contraction length in the rear waist circumference region S2 and the hind leg region R14 having the shortest contraction length in the rear waist circumference region S2 is in the front waist circumference region S1. It is larger than the difference between the contraction length of the lower abdominal region F13 having the longest contraction length and the front leg region F14 having the shortest contraction length in the front waist circumference region S1.
- the dorsal side is more likely to expand and contract than the ventral side during movements such as bending and stretching the wearer's legs.
- the absorbent article 1 If the shape of the absorbent article 1 itself is displaced with respect to the unevenness of the body, the absorbent article 1 is more likely to be displaced during operation. However, by realizing the shape along the unevenness of the body of the absorbent article 1, the followability of the absorbent article 1 during operation is improved, and the displacement can be suppressed.
- each region of the absorbent article 1 is configured to have an appropriate tensile stress. Each region is deformed in a different manner due to the difference in tensile stress, and the absorbent article 1 is configured to be difficult to slip down.
- Each region in the tensile stress is a region of the exterior body 50 (a region not including the absorbent body 20).
- the regulation of each region and the measurement of tensile stress can be obtained by the following methods.
- the absorbent article 1 having the side joint portion 16 tears the side joint portion 16 to separate the front waist circumference region S1 and the rear waist circumference region S2.
- the absorbent body 20 is separated from the exterior body 50. After leaving the exterior body 50 in an environment of temperature 23 ° C. ⁇ 2 ° C.
- the exterior body 50 is stretched until wrinkles disappear, and the front waist circumference area S1 and the rear waist circumference S1 and the rear waist circumference are extended. Mark the boundaries of the region of region S2.
- the exterior body 50 can be cut based on the mark to obtain a test piece divided into a plurality of regions.
- both ends (5 mm width) of the cut out test piece are sandwiched by the chucks (pinching tools) of the tensile tester (Instron). At this time, the distance between the chucks is set to 100 mm.
- the other chuck is moved so as to change the distance between the chucks.
- the moving speed of the chuck at this time is 254 mm / min.
- the stress related to the chuck is measured, and the stress (N) obtained in a state of 70% (constant width) from the extended state is defined as "tensile stress”.
- Table 2 shows the measurement data of the tensile stress obtained in the absorbent article 1 according to the second embodiment. Although Table 2 shows only the measurement results of Example 2, the relationship of tensile stress in the following description is the same for the absorbent article according to Example 1.
- the wearer's body shape differs between the ventral side and the dorsal side, and the waist circumference changes in the longitudinal direction L of the absorbent article 1.
- the waist circumference near the dent at the lower end of the abdomen is the shortest, and the waist circumference becomes longer from the dent at the lower end of the abdomen toward the upper side and the inseam side.
- the waist circumference becomes shorter as the distance from the bulge of the buttocks increases, and in the vicinity of the waist (the thinnest part of the torso), there is little change in the waist circumference, and it is almost outward of the body.
- the absorbent article 1 has a flat shape with little bulge.
- the region where the stress is large is in close contact with the body.
- the region having a large stress moves to the portion having a short waist circumference due to the contraction of the absorbent article 1, so that the absorbent article 1 becomes. It may shift.
- the tensile stress in the width direction W of the lower abdominal region F13 is larger than the tensile stress in any region of the front waist circumference region S1. That is, the relationship of tensile stress satisfies F13> F11, F13> F12, and F13> F14.
- the tensile stress in the width direction W of the rear waist region R11 is larger than the tensile stress in any region of the rear waist circumference region S2. That is, the relationship of tensile stress satisfies R11> R12, R11> R13, and R11> R14.
- the lower abdominal region F13 that abuts on the abdomen with the shortest girth dimension has the largest tensile stress
- the rear waist region R11 that abuts on the back that abuts on the shortest girth dimension has the largest tensile stress and the body has the shortest girth dimension.
- the region with the highest stress hits.
- the absorbent article 1 can be prevented from being displaced in the longitudinal direction L by fitting the absorbent article 1 to the shape of the body due to the contraction of the absorbent article 1. .. That is, by arranging a region having a large stress in the recess of the body, the shape of the body and the stress of the absorbent article 1 match, and the displacement of the absorbent article 1 can be suppressed.
- the rear waist region R11 which has a relatively large stress, fits in the vicinity of the dorsal waist where the body has a flat shape, it is difficult for the displacement of L in the longitudinal direction during fitting to occur, and it is suitable for the absorbent article 1. Easy to maintain position.
- the tensile stress in the width direction W of the upper back region R12 may be larger than the tensile stress in the width direction W of the lower back region R13. That is, the relationship of tensile stress may satisfy R12> R13.
- the tensile stress in the rear waist circumference region S2 gradually increases in the order of the lower back region R13, the upper back region R12, and the rear waist region R11.
- the lower back region R13 is a portion that covers the bulge of the wearer's buttocks.
- the waist circumference on the dorsal side gradually shortens from the bulge of the buttocks toward the upper side.
- the absorbent article 1 By increasing the stress of the absorbent article 1 as the waist circumference of the body becomes smaller, the absorbent article 1 can be aligned with the wearer's body shape and the deviation of the absorbent article 1 in the longitudinal direction L can be suppressed.
- the lower dorsal region R13 is arranged to face the discharged stool. If the tensile stress of the lower back region R13 is large, the stool may come into close contact with the body and the wearing feeling may be deteriorated. However, the lower back region R13 has a smaller stress than the rear waist region R11 and the upper back region R12, and does not come into close contact with the body.
- the discharged stool can be continuously accommodated without being in close contact with the body, and deterioration of the wearing feeling can be suppressed.
- the bulging portion of the buttocks covered by the lower back region R13 is a portion where the body can easily move during operation. Since the absorbent article 1 does not come into close contact with the portion where the body easily moves during the operation, the absorbent article 1 is less likely to swell due to the movement of the body, and the displacement can be suppressed.
- the tensile stress in the width direction W of the lower back region R13 may be larger than the tensile stress in the width direction W of the hind leg region R14. That is, the relationship of tensile stress may satisfy R13> R14 and R11> R12> R13> R14.
- the tensile stress in the rear waist circumference region S2 gradually increases in the order of the rear leg region R14, the lower back region R13, the upper back region R12, and the rear waist region R11. The waist circumference on the dorsal side becomes shorter from the bulge of the buttocks toward the inseam side.
- the waist circumference of the portion where the hind leg region R14 is arranged is shorter than the waist circumference of the portion where the lower back region R13 is arranged.
- the hind leg region R14 is a region in which the base of the foot is arranged and is easy to move following the movement of the foot. By making the tensile stress of the hind leg region R14 relatively small, it is possible to improve the wearing feeling without hindering the movement of the base of the foot.
- the tensile stress in the width direction W of the front waist region F11 may be smaller than the tensile stress in the width direction W of the upper abdominal region F12. That is, the relationship of tensile stress may satisfy F11 ⁇ F12.
- the waist circumference of the wearer's abdomen has the shortest dent at the lower end of the abdomen and becomes longer as it moves upward from the dent.
- the tensile stress in the anterior waist circumference region S1 gradually increases in the order of the lower abdominal region F13, the upper abdominal region F12, and the anterior waist region F11.
- the absorbent article 1 By increasing the stress of the absorbent article 1 as the waist circumference of the body becomes smaller, the absorbent article 1 can be aligned with the wearer's body shape, and the deviation of the absorbent article 1 in the longitudinal direction L can be suppressed. Further, the bulging portion of the abdomen covered by the front waist region F11 is a portion where the body can easily move during operation. Since the absorbent article 1 does not come into close contact with the portion where the body easily moves during the operation, the absorbent article 1 is less likely to swell due to the movement of the body, and the displacement can be suppressed.
- the tensile stress of the lower abdominal region F13 is equal to or less than the total value of the tensile stresses of the other regions of the front waist circumference region S1, the lower abdominal region F13 does not protrude too much with respect to the total pressure applied to the front waist circumference region S1. It is possible to suppress the slippage while suppressing it.
- the relationship of the tensile stress in the front waist circumference region S1 may satisfy F13> F12> F11> F14.
- the relationship of tensile stress can be arranged according to the circumference of the waist of the abdomen, the absorbent article 1 can be fitted to the lower abdomen region F13 having a relatively short circumference, and the trace of the elastic member of the suspension can be seen.
- the tensile stress in the width direction W of the rear waist region R11 is larger than the tensile stress in any other region. That is, the relationship of tensile stress satisfies R11> F11, R11> F12, R11> F13, and R11> F14.
- the tensile stress in the width direction W of the rear waist region R11 is larger than the tensile stress in any other region, the displacement can be suppressed by increasing the pressure applied to the back while suppressing the pressure applied to the abdomen. The feeling of pressure on the wearer's abdomen can be suppressed, and the feeling of wearing can be improved.
- the total value of the tensile stress in the width direction W of the four regions of the rear waist circumference region S2 may be larger than the total value of the tensile stress in the width direction W of the four regions of the front waist circumference region S1. That is, the relationship of tensile stress satisfies R11 + R12 + R13 + R14> F11 + F12 + F13 + F14.
- the wearer's body shape differs between the abdomen and the back, with the ventral side bulging more than the dorsal side.
- the total value of the tensile stresses in the multiple regions of the anterior girth region S1 is relatively small, it is not overtightened to the ventral side where the body has a lot of bulge, and the total values of the tensile stresses in the multiple regions of the rear girth region S2 are compared.
- the absorbent article 1 fits on the back side, which is large in size and has little bulge, and can improve the wearing feeling and suppress the displacement at the same time.
- the total value of the tensile stress in the width direction W of the front waist region F11 and the tensile stress in the width direction W of the rear waist region R11 is the tensile stress in the width direction W of the lower abdominal region F13 and the tensile stress in the width direction W of the lower back region R13. May be greater than the total value of. That is, the relationship of tensile stress may satisfy F11 + R11> F13 + R13.
- the front waist circumference area S1 and the rear waist circumference area S2 are connected to each other, and both cover the wearer's waist circumference in cooperation with each other.
- the size of the circumference of the waist of the wearer tends to be shorter in the vicinity of the waist opening than in the vicinity of the lower abdomen.
- the total value may be larger than the total value of the tensile stress in the width direction W of the upper abdominal region F12 and the tensile stress in the width direction W of the upper back region R12. That is, the relationship of tensile stress may satisfy F11 + R11> F12 + R12 and may satisfy F13 + R13> F12 + R12.
- the circumference of the waist is the shortest in the vicinity of the waist opening, and becomes longer from the waist opening toward the inseam side.
- the reason for the lengthening is due to the bulge of the abdomen and the inclination from the apex of the buttocks.
- the bulge of the abdomen and the inclination from the apex of the buttocks mainly correspond to the upper abdominal region F12 and the upper dorsal region R12. Since the total value of the tensile stress of the upper abdominal region F12 and the upper back region R12 is smaller than the total value of the tensile stress of the front waist region F11 and the tensile stress of the rear waist region R11, the bulge of the body is not tightened and the body is touched.
- the absorbent article 1 is arranged along the line.
- the circumference of the waist is shortened by the dent of the lower abdomen toward the inseam side rather than the bulge of the abdomen and the inclination from the apex of the buttocks.
- the total value of the tensile stress of the lower abdominal region F13 and the tensile stress of the lower back region R13 is larger than the total value of the tensile stress of the upper abdominal region F12 and the upper back region R12, and fits the dent of the lower abdomen.
- the region from the vicinity of the waist opening to the lower end of the abdomen is arranged according to the circumference of the body, and it is possible to suppress the deviation of the entire absorbent article 1 while suppressing the deterioration of the wearing feeling due to local tightening.
- the total value of the tensile stress in the width direction W of the rear waist region R11 and the tensile stress in the width direction W of the upper back region R12 is the tensile stress in the width direction W of the lower abdominal region F13 and the tensile stress in the width direction W of the hind leg region R14. May be greater than the total value of. That is, the relationship of tensile stress may satisfy R11 + R12> R13 + R14.
- the shape of the body on the back is recessed on the upper side, and the rear waist region R11 and the upper back region R12 are regions that are relatively recessed on the back. By fitting the recessed portion of the back portion with a strong stress, the displacement of the absorbent article 1 is suppressed.
- the total value of the tensile stress in the width direction W of the rear waist region R11 and the tensile stress in the width direction W of the upper back region R12 is the tensile stress in the width direction W of the lower abdominal region F13 and the width direction W of the hind leg region R14. It may be larger than the total value of tensile stress. That is, the relationship of tensile stress may satisfy F11 + F12> F13 + F14.
- the shape of the body of the abdomen is recessed on the lower side, and the lower abdominal region F13 and the front leg region F14 are relatively recessed regions in the abdomen. By fitting the recessed portion of the abdomen with a strong stress, the displacement of the absorbent article 1 is suppressed.
- the relationship of tensile stress may satisfy R11 + R12> F13 + F14.
- the posterior waist region R11 and the upper back region R12 are regions that are relatively recessed in the back.
- the lower abdominal region F13 and the front leg region F14 are regions that are relatively recessed in the abdomen. It can be tightened tightly against the recessed areas in the abdomen and back to prevent slippage.
- the tensile stress in the width direction W of R11 in the rear waist region may be larger than the tensile stress in the width direction W of the lower abdominal region F13. That is, the relationship of tensile stress may satisfy R11> F13.
- the tensile stress in the lower abdominal region is the largest in the front waist circumference region S1
- the tensile stress in the rear waist region is the largest in the rear waist circumference region S2
- the lower abdominal region and the posterior waist region are pulled to each other in the mounted state.
- an obliquely upward force acts from the center of the abdomen toward the side of the body. Therefore, even if a force on the inseam region side acts during absorption of body fluid such as urine, the withdrawal of the absorbent article 1 can be suppressed.
- the tensile stress in the width direction W of R12 in the upper back region may be larger than the tensile stress in the width direction W of the lower abdominal region F13. That is, the relationship of tensile stress may satisfy R12> F13.
- the lower abdominal region F13 and the upper back region R12 pull each other.
- an obliquely upward force acts from the center of the abdomen toward the side of the body. Therefore, even if a force on the inseam region side acts during absorption of body fluid such as urine, the withdrawal of the absorbent article 1 can be suppressed.
- the tensile stress in the width direction W of the lower abdominal region F13 may be larger than the tensile stress in the width direction W of the lower back region R13. That is, the relationship of tensile stress may satisfy F13> R13.
- the lower abdominal region F13 and the lower back region R13 are pulled to each other via the side joint portion 16.
- the relationship of tensile stress satisfies F13> R13
- the lower abdominal region having a relatively large tensile stress pulls the dorsal side to the ventral side, and the fit to the lower end of the abdomen can be further improved.
- the tensile stress of the rear waist region R11 is relatively large in the back portion, an upward force is generated, and the displacement of the absorbent article 1 can be suppressed.
- the tensile stress in the width direction W of the upper back region R12 may be larger than the tensile stress in the width direction W of the upper abdominal region F12. That is, the relationship of tensile stress may satisfy R12> F12. Further, preferably, the tensile stress in the width direction W of the upper back region R12 may be twice or more the tensile stress in the width direction W of the upper abdominal region F12.
- the shape of the body is recessed above the apex of the buttocks where the upper back region R12 is located, and the portion above the lower end of the abdomen where the upper abdomen region F12 is arranged is bulged.
- the difference in the circumference of the waistline between the region at the beginning of the dent with respect to the apex of the buttocks and the region at the beginning of the bulge with respect to the lower end of the abdomen tends to be large.
- the relationship of tensile stress by satisfying R12> F12, the stress arrangement can be made more suitable for the shape of the body, and the slippage of the absorbent article 1 can be suppressed.
- the total value of the tensile stress in the width direction W of the rear waist region R11 and the tensile stress in the width direction W of the upper back region R12 is the tensile stress in the width direction W of the front waist region F11 and the tensile stress in the width direction W of the upper abdominal region F12. It may be greater than or equal to the total value of stress. According to this aspect, by tightening the dorsal side more strongly than the ventral side to the vicinity of the recessed portion in the shape of the body, a force opposite to the direction in which the ventral side shifts downward can be applied. It is possible to suppress the slippage of the.
- the configuration of the absorbent body may be changed. More specifically, the low basis weight portion LR may be arranged in a region overlapping the lower abdominal region F13.
- the absorption core 31 is easily deformed by the low basis weight portion LR, the lower abdominal region F13 fits the dent at the lower end of the abdomen more, and the deviation of the front waist circumference region S1 can be further suppressed.
- the absorbent article of the present embodiment is designed to have a tensile stress and a shrinkage length suitable for each stress. Areas with high tensile stress are in close contact with the wearer. As a result, the area fits the body and the pressure is increased. On the other hand, the region where the tensile stress is low does not come into close contact with the body too much. Therefore, the space between the body and the absorbent article is appropriately secured to secure the storage space for excrement, the deterioration of the wearing feeling due to tightening is suppressed, and the displacement of the absorbent article due to excessive follow-up of the body movement is prevented. Can be suppressed.
- the length in the width direction W is unlikely to be shortened when worn, and it is easy to be arranged along the bulge of the body. Further, in the region where the contraction length is short, the difference between the length in the extended state and the length in the natural state is small. Since the shrinkable length in the region is small, it is difficult for the position to shift. On the other hand, in the region where the contraction length is long, the length in the width direction W becomes short when worn, and it is easy to be arranged along the dent of the body.
- a configuration for increasing the stress in each region can be realized by, for example, the following. Increase the elongation ratio of the waist elastic member arranged on the exterior body. Alternatively, the number of thread-shaped or string-shaped waist elastic members 55 is increased. Alternatively, the count of the thread-shaped waist elastic member arranged on the exterior body is increased. Further, as the configuration for reducing the stress in each region, the reverse configuration of the configuration for increasing the stress may be adopted. Further, a configuration for increasing the contraction length of each region can be realized by, for example, the following. Increase the elongation ratio of the waist elastic member arranged on the exterior body. Alternatively, the number of thread-shaped or string-shaped waist elastic members 55 is increased.
- the count of the thread-shaped waist elastic member arranged on the exterior body is increased.
- the count of the elastic member has a relatively large effect on the tensile stress and a relatively small effect on the shrinkage length.
- reduce the basis weight of the absorbent material of the absorbent core By reducing the amount of materials and adhesives, not arranging the absorbent core, and lowering the basis weight of the absorbent material, the rigidity becomes low and the shrinkage becomes easy.
- the reverse configuration of the configuration for increasing the contraction length may be adopted.
- the shrinkage length is the natural length of each region in the entire absorbent article 1 with respect to the stretched state
- the tensile stress is the tensile stress of each region in the exterior body 50.
- the contraction length and the tensile stress have different definitions, and their magnitude relations are also different. More specifically, when the contraction length of any first region is longer than the contraction length of any second region (the first region contracts more), the tensile stress of the first region is second. It is not always greater than the tensile stress in the region, and the tensile stress in the first region may be smaller than the tensile stress in the second region.
- the tensile stress in the width direction of the rear waist region R11 is higher than the tensile stress in the upper back region R12, and the contraction length in the width direction of the upper back region R12 is longer than the contraction length in the width direction of the rear waist region R11.
- the relationship of tensile stress may satisfy R11> R12
- the relationship of shrinkage length may satisfy R12> R11.
- the posterior waist region has a higher tensile stress and tends to have a higher pressure on the body than the upper back region.
- the rear waist region R11 has a shorter contraction length, a smaller contraction amount, and is easier to keep a position with respect to the body as compared with the upper back region R12. Since the rear waist region R11 has a small deviation and the wearing pressure is high, it is possible to suppress the formation of a gap between the back waist opening and the wearer during the wearer's movement.
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Abstract
Description
本明細書及び添付図面の記載により、少なくとも以下の事項が明らかとなる。
一態様に係る吸収性物品は、互いに直交する長手方向及び幅方向と、前胴回り域、後胴回り域、及び前記前胴回り域及び前記後胴回り域との間に配置された股下域と、少なくとも股下域に配置された吸収コアと、を有する。前記前胴回り域及び前記後胴回り域には、前記前胴回り域及び前記後胴回り域を長手方向に分割した複数の領域が設けられている。前記複数の領域は、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する0~25%後方に位置する前ウエスト領域と、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する25~50%後方に位置する上腹領域と、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する50~75%後方に位置する下腹領域と、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する75~100%後方に位置する前脚領域と、を有する。前記下腹領域の前記幅方向の収縮長さは、前記前脚領域の前記幅方向の収縮長さよりも長い。着用者の体形は、吸収性物品の長手方向において胴回り寸法が変化する。出願人が鋭意研究したところ、着用者の腹部の胴回り寸法は、腹部の下端の凹み付近の胴回り寸法が短く、下端の凹みから股下側に向かって徐々に長くなる。吸収性物品において収縮長さが長い領域は、伸長状態から自然状態に変化する過程で、収縮する長さが長く、収縮による変化が大きい。腹部において胴回り寸法が短い部分(凹み)に当接する下腹領域の収縮長さが長く、凹みよりも膨らむ部分に当接する前脚領域の収縮長さが比較的短いため、吸収性物品自体が身体の凹凸に沿う形状に変形する。身体の凹みに吸収性物品の寸法が短い部分が配置されることで、当該凹みに吸収性物品が引っ掛かり、吸収性物品のずれを抑制できる。
以下、図面を参照して、実施形態に係る吸収性物品について説明する。なお、以下の図面の記載において、同一又は類似の部分には、同一又は類似の符号を付している。ただし、図面は模式的なものであり、各寸法の比率等は現実のものとは異なることに留意すべきである。したがって、具体的な寸法等は、以下の説明を参酌して判断すべきである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれ得る。図1は、本実施形態に係る吸収性物品の模式正面図である。図2は、本実施形態に係る吸収性物品の展開状態の模式平面図である。図2は、後述するサイド接合部の接合を解除した状態において吸収性物品1を皺が形成されない状態まで伸長させた伸長状態を示している。図3は、図2におけるF3-F3線に沿った吸収性物品の模式断面図である。なお、説明の便宜上、図示が省略されている部材がある。また、説明の便宜上、各部材が厚さ方向において離間していたとしても、実際の製品では厚さ方向に接していることがある。
(式1) 収縮長さ=伸長状態の長さ―自然状態の長さ(単位:mm)
Claims (14)
- 互いに直交する長手方向及び幅方向と、
前胴回り域、後胴回り域、及び前記前胴回り域及び前記後胴回り域との間に配置された股下域と、
少なくとも前記股下域に配置された吸収コアと、を有する吸収性物品であって、
前記前胴回り域及び前記後胴回り域には、前記前胴回り域及び前記後胴回り域を前記長手方向に分割した複数の領域が設けられており、
前記複数の領域は、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する0~25%後方に位置する前ウエスト領域と、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する25~50%後方に位置する上腹領域と、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する50~75%後方に位置する下腹領域と、前記前胴回り域の前端縁から前記前胴回り域の前記長手方向の全長に対する75~100%後方に位置する前脚領域と、を有し、
前記下腹領域の前記幅方向の収縮長さは、前記前脚領域の前記幅方向の収縮長さよりも長い、吸収性物品。 - 前記下腹領域の前記幅方向の収縮長さは、前記上腹領域の前記幅方向の収縮長さよりも長い、請求項1に記載の吸収性物品。
- 前記上腹領域の前記幅方向の収縮長さは、前記前ウエスト領域の前記幅方向の収縮長さよりも長い、請求項2に記載の吸収性物品。
- 前記前ウエスト領域の前記幅方向の前記収縮長さと前記上腹領域の前記幅方向の前記収縮長さの差は、前記上腹領域の前記幅方向の前記収縮長さと前記下腹領域の前記幅方向の前記収縮長さの差よりも小さい、請求項3に記載の吸収性物品。
- 前記上腹領域の前記幅方向の収縮長さは、前記前脚領域の前記幅方向の収縮長さよりも長い、請求項1から請求項4のいずれか1項に記載の吸収性物品。
- 前記下腹領域の前記幅方向の収縮長さは、前記前胴回り域のいずれの領域の前記幅方向の収縮長さよりも長い、請求項1から請求項5のいずれか1項に記載の吸収性物品。
- 前記複数の領域は、前記後胴回り域の後端縁から前記後胴回り域の前記長手方向の全長に対する0~25%前方に位置する後ウエスト領域と、前記後胴回り域の後端縁から前記後胴回り域の前記長手方向の全長に対する25~50%前方に位置する上背領域と、前記後胴回り域の後端縁から前記後胴回り域の前記長手方向の全長に対する50~75%前方に位置する下背領域と、前記後胴回り域の後端縁から前記後胴回り域の前記長手方向の全長に対する75~100%前方に位置する後脚領域と、を有し、
前記上背領域の前記幅方向の収縮長さは、前記後ウエスト領域の前記幅方向の収縮長さよりも長い、請求項1から請求項6のいずれか1項に記載の吸収性物品。 - 前記上背領域の前記幅方向の収縮長さは、前記下背領域の前記幅方向の収縮長さよりも長い、請求項7に記載の吸収性物品。
- 前記後脚領域の前記幅方向の収縮長さは、前記下背領域の前記幅方向の収縮長さよも短い、請求項7又は請求項8に記載の吸収性物品。
- 前記上背領域の前記幅方向の前記収縮長さと前記下背領域の前記幅方向の前記収縮長さの差は、前記上背領域の前記幅方向の前記収縮長さと前記後ウエスト領域の前記幅方向の前記収縮長さの差よりも大きい、請求項9に記載の吸収性物品。
- 前記後ウエスト領域の前記幅方向の収縮長さは、前記下背領域の前記幅方向の収縮長さよりも長い、請求項7から請求項10のいずれか1項に記載の吸収性物品。
- 前記上背領域の前記幅方向の収縮長さは、前記後胴回り域のいずれの領域の収縮長さよりも長い、請求項7から請求項11のいずれか1項に記載の吸収性物品。
- 前記後胴回り域において最も長い収縮長さと最も短い収縮長さの差は、前記前胴回り域において最も長い収縮長さと最も短い収縮長さの差よりも大きい、請求項7から請求項12のいずれか1項に記載の吸収性物品。
- 前記後ウエスト領域の前記幅方向の引張り応力は、前記上背領域の前記幅方向の前記引張り応力よりも高い、請求項7から請求項13のいずれか1項に記載の吸収性物品。
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