CN112334112A - Absorbent article - Google Patents
Absorbent article Download PDFInfo
- Publication number
- CN112334112A CN112334112A CN201980043969.8A CN201980043969A CN112334112A CN 112334112 A CN112334112 A CN 112334112A CN 201980043969 A CN201980043969 A CN 201980043969A CN 112334112 A CN112334112 A CN 112334112A
- Authority
- CN
- China
- Prior art keywords
- surface side
- absorbent
- skin surface
- core
- absorbent core
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 230000002745 absorbent Effects 0.000 title claims abstract description 290
- 239000002250 absorbent Substances 0.000 title claims abstract description 290
- 239000006096 absorbing agent Substances 0.000 claims abstract description 48
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 18
- 238000005253 cladding Methods 0.000 claims abstract description 5
- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 210000002700 urine Anatomy 0.000 claims description 13
- 230000035807 sensation Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 64
- 230000014759 maintenance of location Effects 0.000 description 15
- 238000005259 measurement Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000004745 nonwoven fabric Substances 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 1
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 229920000247 superabsorbent polymer Polymers 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000012360 testing method Methods 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
- A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm
-
- 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
- A61F13/53—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 absorbing medium
-
- 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
- A61F13/53—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 absorbing medium
- A61F13/531—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 absorbing medium having a homogeneous composition through the thickness of the pad
- A61F13/532—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
- A61F13/533—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 absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having discontinuous areas of compression
-
- 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
- A61F13/53—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 absorbing medium
- A61F13/539—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 absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
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)
Abstract
Provided is an absorbent article which can suppress the deformation of an absorbent body by a compression section and can improve the tactile sensation of the skin. The absorbent article (10) has an absorber (40) and a compression section (80) that compresses the absorber (40). The absorber (40) has an absorbent core (40a) and a core cladding (40b) that covers the absorbent core (40 a). The compressed sections (80) are formed in a grid pattern on the absorber (40). In the absorptive article, in the area overlapping with the compression part (80) in a plan view, a joint part (36a) where the core wrap layer (40b) on the non-skin surface side of the absorptive core (40a) is joined to the absorptive core (40a) and a non-joint part (35b) where the core wrap layer (40b) on the skin surface side of the absorptive core (40a) is not joined to the absorptive core (40a) are provided.
Description
Technical Field
The present invention relates to an absorbent article including an absorbent body having a compressed portion.
Background
An absorbent article such as a disposable diaper has an absorbent body that absorbs liquid such as urine. In the absorbent article described in patent document 1, the absorbent body is provided with compressed grooves in a lattice shape. By forming the compressed grooves in the absorber, the flexural rigidity thereof is improved, and the shape retention of the absorber is maintained.
Prior art documents
Patent document
Patent document 1: japanese patent laid-open No. 2018-47189
Disclosure of Invention
The rigidity of the absorbent body is increased by the compressed portions (embossing). Therefore, when the absorbent body is formed with the compressed portions in a lattice shape, the shape retention of the absorbent body is easily maintained. However, the rigidity of the absorber is increased, and the skin feel may be reduced.
Therefore, an absorbent article that can suppress the deformation of the absorbent body by the compressed portion and improve the tactile sensation of the skin is desired.
An absorbent article according to one aspect includes an absorbent body and a compressed portion that compresses the absorbent body. The absorbent body has an absorbent core and a core cladding that covers the absorbent core. The compressed parts are formed in a lattice shape in the absorbent body. In the absorbent article, in a region overlapping the compressed portion in a plan view, a joint portion where the core wrap on the non-skin surface side of the absorbent core is joined to the absorbent core and a non-joint portion where the core wrap on the skin surface side of the absorbent core is not joined to the absorbent core are provided.
Drawings
Fig. 1 is a plan view of the absorbent article of the first embodiment as viewed from the skin surface side.
Fig. 2 is a plan view of the absorbent article of the first embodiment viewed from the non-skin surface side.
Fig. 3 is a plan view of the absorber of the first embodiment.
Fig. 4 is a schematic cross-sectional view of the absorbent article taken along line 4A-4A of fig. 1.
Fig. 5 is a diagram showing the pattern of compressed portions of the absorbent body of the second embodiment.
Fig. 6 is a diagram showing the pattern of compressed portions of the absorbent body of the third embodiment.
Detailed Description
(1) Brief description of the embodiments
At least the following matters will be made clear from the description of the present specification and the drawings.
An absorbent article according to one aspect includes an absorbent body having an absorbent core and a core covering layer covering the absorbent core, and a compressed portion formed by compressing the absorbent body, wherein the compressed portion is formed in a lattice shape in the absorbent body, and in the absorbent article, a bonded portion where the core covering layer on a non-skin surface side of the absorbent core is bonded to the absorbent core and a non-bonded portion where the core covering layer on the skin surface side of the absorbent core is not bonded to the absorbent core are provided in a region overlapping with the compressed portion in a plan view.
Since the absorbent body is provided with the compressed portions in a lattice shape, the absorbent body has improved flexural rigidity, and the shape retention of the absorbent body is easily maintained. In particular, a joint portion is provided in a region overlapping the compressed portion in a plan view, and at least a part of the core wrap on the non-skin surface side of the absorbent core is joined to the absorbent core. The lattice-shaped compressed parts facilitate the maintenance of shape retention of the absorbent body and suppress the deformation of the absorbent body.
On the other hand, a non-joint portion is provided in a region overlapping the compressed portion in a plan view, and at least a part of the core wrap on the skin surface side of the absorbent core is not joined to the absorbent core. Therefore, the core wrap layer on the skin surface side floats from the compressed portion, and the unevenness generated by the compressed portion on the skin surface side is less likely to be felt, so that the skin feel can be improved.
According to a preferred aspect, the compressed portions are formed on the skin surface side and the non-skin surface side of the absorbent body, and the depth of the compressed portions formed on the skin surface side of the absorbent body is larger than the depth of the compressed portions formed on the non-skin surface side of the absorbent body.
When the compressed portion is formed in the absorbent body, the core wrap layer on the skin surface side is extended deeply, and therefore, the force to return to the original state is more likely to act. This makes it easy for the core wrap layer on the skin surface side to be not joined to the absorbent core. Therefore, the core wrap layer on the skin surface side is easily returned to the topsheet side, and therefore, the core wrap layer on the skin surface side floats from the compressed portion, and the unevenness generated by the compressed portion on the skin surface side is less likely to be felt, and the skin feel can be further improved.
On the other hand, when the compressed portion is formed in the absorbent body, the core wrap layer on the non-skin surface side is not stretched so much, and therefore, the state of being joined to the absorbent core is easily maintained.
According to a preferred embodiment, the elongation of the core wrap layer on the skin surface side of the absorbent core is smaller than the elongation of the core wrap layer on the non-skin surface side of the absorbent core.
Since the elongation of the core wrap layer on the skin surface side is smaller than the elongation of the core wrap layer on the non-skin surface side of the absorbent core, the core wrap layer on the skin surface side is easily returned to the original state even if temporarily stretched. That is, when the compressed portion is formed in the absorbent body, the core wrap layer on the skin surface side is easily returned to the original state after the absorbent core and the core wrap layer are pressed in the thickness direction. Thus, the core wrap layer on the skin surface side is easily not bonded to the absorbent core, and the core wrap layer on the skin surface side is easily lifted from the compressed portion of the absorbent core. Therefore, the unevenness generated by the compressed portion on the skin surface side is less likely to be felt, and therefore the skin feel can be further improved.
On the other hand, since the core wrap layer on the non-skin surface side has a relatively high elongation, it deforms together with the absorbent core when the compressed portions are formed in the absorbent body, and the state of being joined to the absorbent core is easily maintained.
According to a preferred embodiment, an adhesive is provided between the absorbent core and the core wrap, and the weight per unit area of the adhesive on the skin surface side of the absorbent core is smaller than the weight per unit area of the adhesive on the non-skin surface side of the absorbent core.
Since the weight per unit area of the adhesive that can be attached to the core wrap layer on the skin surface side is small, the core wrap layer on the skin surface side is likely to be unbonded to the absorbent core, and the absorbent body is less likely to be hardened on the skin surface side. Therefore, the skin feel of the absorber can be further improved.
On the other hand, since the core wrap layer on the non-skin surface side and the absorbent core are firmly bonded with the adhesive having a large basis weight, the shape retention of the absorbent body can be easily maintained.
According to a preferred embodiment, in the cells surrounded by the lattice-like compressed parts of the absorbent body, the ratio of the maximum thickness of the absorbent core to the maximum length of the cells is 0.09 or more.
The greater the ratio of the maximum thickness of the absorbent core relative to the maximum length of the cells means the greater the protrusion of the absorbent core relative to the size of the cells. By setting this ratio to 0.09 or more, the lattice-like compressed portions are firmly formed, and the shape retention of the absorbent body is easily maintained.
According to a preferred embodiment, in the cells surrounded by the lattice-like compressed parts of the absorbent body, the ratio of the maximum thickness of the absorbent core to the maximum length of the cells is 0.16 or less.
By setting this ratio to 0.16 or less, the absorbent core of the unit does not excessively bulge out, and therefore, the core wrap layer on the non-skin surface side can be prevented from coming off from the absorbent core. This strongly bonds the core wrap layer on the non-skin surface side to the absorbent core, and therefore the effect of suppressing the deformation of the absorbent body is improved.
According to a preferred aspect, a non-joined region between the core wrap and the absorbent core on the skin surface side of the absorbent core is larger than a non-joined region between the core wrap and the absorbent core on the non-skin surface side of the absorbent core.
Since the area of the non-bonded region between the core wrap layer on the non-skin surface side of the absorbent core and the absorbent core is small, that is, the bonded region is large, the core wrap layer on the non-skin surface side and the absorbent core are firmly bonded. Therefore, the shape retention of the absorbent body can be easily maintained.
On the other hand, since the core wrap layer on the skin surface side of the absorbent core has a large non-joined region with the absorbent core, the core wrap layer and the surface sheet on the skin surface side thereof float from the compressed portion, and the unevenness due to the compressed portion on the skin surface side is less likely to be felt, so that the skin feel can be further improved.
According to a preferred embodiment, the compressed portion is formed on a skin surface side and a non-skin surface side of the absorbent body, and at least a part of a non-joined region where the core wrap and the absorbent core are not joined on the skin surface side with respect to the absorbent core is provided in a region of the compressed portion so as to face a joined region where the core wrap and the absorbent core are joined on the non-skin surface side with respect to the absorbent core.
Thus, since the compressed portion is firmly formed on the non-skin surface side of the absorbent body and the non-joined region where the core wrap and the absorbent core are not joined is formed on the skin surface side of the absorbent body, the top sheet floats from the compressed portion, and the unevenness due to the compressed portion on the skin surface side is less likely to be felt, so that the skin feel can be improved.
According to a preferred aspect, the compressed portions are formed on the skin surface side and the non-skin surface side of the absorbent body, the absorbent article has a back sheet positioned on the non-skin surface side of the absorbent body, and at least a portion of the back sheet on the non-skin surface side of the absorbent core is joined to the core wrap layer in a region of the compressed portions on the non-skin surface side.
The back sheet is joined to the core wrap layer in the region of the compressed portion on the non-skin surface side of the absorbent body, so that the lattice-shaped compressed portion is firmly formed on the non-skin surface side. This makes it easier to maintain the shape retention of the absorbent body and further suppress the deformation of the absorbent body.
According to a preferred embodiment, the compressed part is formed on the skin surface side and the non-skin surface side of the absorbent body, and the absorbent body has an indicator for determining whether or not urine adheres to the absorbent body on the non-skin surface side, and at least a part of the indicator is provided in close contact with the compressed part on the non-skin surface side.
The indicator can change color due to the attachment of urine, for example, to inform the user of the presence or absence of the attachment of urine. Here, since at least a part of the indicator is disposed in close contact with the compressed portion on the non-skin surface side, the indicator easily reacts with urine absorbed by the absorbent body. This makes it possible for the user to easily determine the absorption of urine into the absorbent body.
(2) First embodiment
Hereinafter, embodiments will be described with reference to the drawings. In the following drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic drawings, and the ratio of the respective dimensions and the like may be different from those in reality.
Fig. 1 is a plan view of the absorbent article of the first embodiment as viewed from the skin surface side. Fig. 2 is a plan view of the absorbent article of the first embodiment viewed from the non-skin surface side. Fig. 3 is a plan view of the absorber of the first embodiment. Fig. 4 is a schematic cross-sectional view of the absorbent article taken along line 4A-4A of fig. 1.
The absorbent article 10 may be an article such as a disposable diaper or a sanitary napkin. Hereinafter, the absorbent article 10 will be described in detail as an example.
The absorbent article 10 has a front region S1, a crotch region S2, and a rear region S3. The front side region S1 is a portion that contacts the front waistline (abdomen) of the wearer. The rear region S3 is a portion that comes into contact with the rear torso-surrounding portion (back) of the wearer. The crotch region S2 is located between the front region S1 and the rear region S3.
In the present embodiment, the direction from the front side region S1 toward the rear side region S3 is referred to as the front-rear direction L. A direction perpendicular to the front-rear direction L is referred to as a width direction W.
The absorbent article 10 may have a topsheet 50, an absorber 40, and a backsheet (60, 62). The surface sheet 50 may be composed of one or more sheets. The top sheet 50 may be formed of a liquid-permeable sheet such as a nonwoven fabric.
The back sheet (60, 62) may be constructed of one or more pieces. In the present embodiment, the back sheet may have a leakage-preventing sheet 62 positioned on the non-skin surface side of the absorber 40 and a non-skin surface sheet 60 positioned on the non-skin surface side of the leakage-preventing sheet 62. The leakage preventive sheet 62 may be formed of a liquid impermeable film, for example. The non-skin surface sheet 60 may be made of, for example, nonwoven fabric.
The absorbent article 10 may have side sheets 70 extending outward in the width direction W from both outer edges of the absorber 40 in the width direction W. The side sheet 70 may be provided at a position overlapping the absorber 40 and closer to the skin surface side than the absorber 40.
In the present embodiment, the absorbent article 10 includes a pair of fastening tapes 90. The fastening tape 90 is provided in the rear region S3. The fastening tape 90 fixes the front region S1 and the rear region S3. The fastening belt 90 holds the absorbent article 10 to the body of the wearer by fixing the front region S1 and the back region S3 to each other.
Instead of the above embodiment, the absorbent article 10 may not include the pair of fastening tapes 90. In this case, for example, the absorbent article may have a pants-type shape. The absorbent article may be of a type that is used by being attached to underwear.
The absorber 40 is disposed between the topsheet 50 and the leakage-preventing sheet 62. The absorber 40 may have an absorbent core 40a and a core wrap 40b that wraps the absorbent core 40 a.
The absorbent core 40a is provided at least in the crotch region S2, and preferably extends from the crotch region S2 to at least one of the front region S1 and the back region S3. The absorbent core 40a can be formed using a material such as ground pulp or a super absorbent polymer.
The core/clad layer 40b is made of a liquid-permeable sheet. The core/clad layer 40b may be made of thin paper or nonwoven fabric, for example. The core wrap layer 40b on the skin surface side of the absorbent core 40a and the core wrap layer 40b on the non-skin surface side of the absorbent core 40a may be formed of different sheets or the same sheet.
The core-covering layer 40b on the skin surface side of the absorbent core 40a may be bonded to the absorbent core 40a with the adhesive 30 a. The core wrap 40b on the non-skin surface side of the absorbent core 40a may be bonded to the absorbent core 40a with the adhesive 30 b.
The absorbent article 10 may have an indicator 68 for determining whether urine has adhered. The indicator 68 may be provided on the non-skin-facing side of the absorber 40. For example, the indicator 68 is provided on the skin surface side of the leakproof sheet 62. In the present embodiment, the indicator 68 extends in the front-rear direction L at least in the crotch region S2. The indicator 68 may be constituted by a member that changes color due to attachment of urine, for example. The indicator 68 can change its color due to the attachment of urine to inform the user of the presence or absence of the attachment of urine.
Preferably, at least a part of the indicator 68 is provided in close contact with a non-skin-side compressed portion 80b described later. More preferably, the indicator 68 is bonded to the core wrap layer 40b at the non-skin-surface-side compressed portion 80b with an adhesive. Since at least a part of the indicator 68 is disposed in close contact with the non-skin surface side compressed portion 80b described later, the indicator 68 easily reacts with urine absorbed by the absorbent body 40. This makes it possible for the user to easily determine the absorption of urine into the absorbent body.
The absorbent article 10 has a compressed portion 80 formed by compressing the absorber 40. The compressed portions 80 are formed in the absorbent core 40a and the core wrap 40 b. The compressed portion 80 may include a skin-side compressed portion 80a formed on the skin side of the absorber 40 and a non-skin-side compressed portion 80b formed on the non-skin side of the absorber 40. The skin-side compressed portion 80a is a portion recessed in the thickness direction from the skin-side surface side of the absorber 40 to the non-skin-side surface side. The non-skin-side compressed portion 80b is a portion recessed from the non-skin side of the absorber 40 toward the skin surface side in the thickness direction. Here, the skin-side compressed portion 80a is provided at a position overlapping the non-skin-side compressed portion 80b in the thickness direction T of the absorber 40.
The compressed portions 80 are formed in a lattice shape in the absorber 40. That is, the absorber 40 may be divided into one or more cells 46 by the compressing portion 80. The shape of the lattice is not particularly limited. For example, the compressing unit 80 may form each cell 46 in a polygonal shape such as a substantially rhombic shape, a substantially rectangular shape, a substantially square shape, or a substantially triangular shape. Instead of the above shape, the compression portion 80 may be arranged to form one substantially square or substantially rectangular unit 46.
The compressing units 80 may be provided at least in the crotch region S2, and are preferably formed in a lattice shape over the entire absorbent body. Here, each cell 46 may not be completely separated from the other cells 46. For example, as shown in fig. 3, the cells 46 adjacent in the front-rear direction L may be connected to each other via a narrow uncompressed portion. Instead of the form shown in fig. 3, the cells 46 adjacent in the width direction W may be connected to each other via a narrow uncompressed portion. In this way, the compression portion 80 may be formed substantially in a lattice shape, and the cells 46 may not be completely separated from each other.
In the present embodiment, the plurality of compressing portions 80 extending in the front-rear direction L are arranged in the width direction W. Each compression portion 80 extends in the front-rear direction L while being bent in a wave-like manner. The phases of the waves of the compression portions 80 adjacent to each other are shifted by 180 °. Thereby, a plurality of cells 46 are formed between the mutually adjacent compressing portions 80.
In the region overlapping the compressed portion 80 in a plan view, a joint portion 35b where the core wrap 40b on the non-skin surface side of the absorbent core 40a is joined to the absorbent core 40a and a non-joint portion 36a where the core wrap 40b on the skin surface side of the absorbent core 40a is not joined to the absorbent core 40a are provided. The joint portion 35b and the non-joint portion 36a may be provided in at least a part of a region overlapping with the compression portion 80 in a plan view. That is, in the region overlapping the compressed portion 80 in a plan view, at least a part of the core wrap layer 40b on the non-skin surface side of the absorbent core 40a is joined to the absorbent core 40a, and in the region of the compressed portion 80, at least a part of the core wrap layer 40b on the skin surface side of the absorbent core 40a is not joined to the absorbent core 40 a. In the region of the compressed portion 80, at least a part of the non-joined portion 36a, which is not joined to the core wrap 40b on the skin surface side of the absorbent core 40a and the absorbent core 40a, is preferably provided so as to face the joined portion 35b, which is joined to the core wrap 40b on the non-skin surface side of the absorbent core 40a and the absorbent core 40 a.
Since the absorbent body 40 is provided with the lattice-shaped compressed portions 80, the bending rigidity of the absorbent body 40 is improved, and the shape retention of the absorbent body 40 is easily maintained. In particular, the joining portion 35b is provided in the region overlapping the compressed portion 80 in plan view, and at least a part of the core wrap layer 40b on the non-skin surface side of the absorbent core 40a is joined to the absorbent core 40 a. The lattice-shaped compressed portions 80 facilitate maintenance of shape retention of the absorber 40, and prevent deformation of the absorber 40. On the other hand, the non-joined portions 36a are provided in the regions overlapping the compressed portions 80 in plan view, and at least a part of the core wrap layer 40b on the skin surface side of the absorbent core 40a is not joined to the absorbent core 40 a. Therefore, the core wrap 40b and the skin-side surface sheet 50 thereof float from the compressed portion 80, and the irregularities caused by the skin-side compressed portion 80 are less likely to be felt, so that the skin feel can be improved.
In the region overlapping the compressed portion 80 in a plan view, a second non-joined portion may be provided in which the core wrap layer 40b on the non-skin surface side of the absorbent core 40a is not joined to the absorbent core 40 a. Preferably, the area of the absorbent core 40a not joined to the core wrap 40b on the skin surface side of the absorbent core 40a is larger than the area of the absorbent core 40a not joined to the core wrap 40b on the skin surface side of the absorbent core 40 a. The non-joined region of the core-covering layer 40b and the absorbent core 40a on the skin surface side of the absorbent core 40a is a region where the non-joined portion 36a of the core-covering layer 40b and the absorbent core 40a on the skin surface side of the absorbent core 40a is arranged. The non-joined region between the core wrap 40b on the non-skin surface side of the absorbent core 40a and the absorbent core 40a is a region where a second non-joined portion, which does not join the core wrap 40b to the absorbent core 40a, is arranged on the non-skin surface side of the absorbent core 40 a. Since the area of the non-bonded region between the core wrap 40b and the absorbent core 40a on the non-skin surface side of the absorbent core 40a is small, that is, the area of the bonded region between the core wrap 40b and the absorbent core 40a on the non-skin surface side of the absorbent core 40a is large, the core wrap 40b and the absorbent core 40a on the non-skin surface side are firmly bonded. Therefore, the shape retention of the absorbent body can be easily maintained. On the other hand, since the non-joined region between the core wrap 40b and the absorbent core 40a on the skin surface side of the absorbent core 40a is large, the core wrap 40b and the skin surface side topsheet 50 thereof easily rise from the compressed portion 80, and the irregularities caused by the skin surface side compressed portion 80 are hard to feel, so that the skin feel can be further improved. In addition, in the region overlapping the compressed portion 80 in a plan view, the second non-joined portion, which does not join the core wrap layer 40b on the non-skin surface side of the absorbent core 40a to the absorbent core 40a, may not be provided.
Preferably, the depth of the skin-side compressed portion 80a is greater than the depth of the non-skin-side compressed portion 80 b. When the compressed portion 80 is formed in the absorber 40, the core wrap layer 40b on the skin surface side is extended deeply, and therefore, a force to return to the original state is more likely to act. This makes it easy for the core wrap 40b on the skin surface side to be not joined to the absorbent core 40 a. Therefore, the core wrap layer 40b on the skin surface side easily returns to the topsheet 50 side, and therefore easily floats from the compressed portion 80, and the unevenness generated by the compressed portion 80 on the skin surface side is less likely to be felt. On the other hand, when the compressed portion 80 is formed in the absorber 40, the core wrap layer 40b on the non-skin surface side is not stretched so much, and therefore, the state of being joined to the absorbent core 40a is easily maintained.
More preferably, the elongation of the core wrap layer 40b on the skin surface side of the absorbent core 40a is smaller than the elongation of the core wrap layer 40b on the non-skin surface side of the absorbent core 40 a. Since the elongation of the core wrap layer 40b on the skin surface side is smaller than the elongation of the core wrap layer 40b on the non-skin surface side of the absorbent core 40a, the core wrap layer 40b on the skin surface side is easily returned to the original state even if temporarily elongated. That is, when the compressed portion 80 is formed in the absorber 40, the core wrap layer 40b on the skin surface side is easily returned to the original state after the absorbent core 40a and the core wrap layer 40b are pressed in the thickness direction. This makes it easy for the core wrap 40b on the skin surface side to be not joined to the absorbent core 40 a. Further, since the core wrap layer 40b on the skin surface side is easily returned to the topsheet 50 side, it is more easily lifted from the compressed portion 80, and it is difficult to feel irregularities caused by the compressed portion 80 on the skin surface side. On the other hand, since the core wrap layer 40b on the non-skin surface side has a relatively high elongation, it deforms together with the absorbent core 40a when the compressed portions 80 are formed in the absorbent body 40, and the state of bonding to the absorbent core 40a is easily maintained.
Here, the elongation of the core/clad layer 40b can be measured by the following method. First, the core wrap 40b is cut out from the absorbent article 10 as a measurement sample. The measurement sample may be a long test piece having a length of 150mm × a width of 25 mm. For the measurement samples, tensile elongation was measured under the conditions of an inter-chuck distance of 100mm and a tensile speed of 100 mm/min for three measurement samples using a tensile testing machine (model AGS-1kNG, manufactured by shimadzu corporation) equipped with a load cell having a maximum load capacity of 50N. The tensile elongation was determined as the average of the tensile elongations of the three measurement samples.
Preferably, the weight per unit area of the adhesive 30a on the skin surface side of the absorbent core 40a is smaller than the weight per unit area of the adhesive 30b on the non-skin surface side of the absorbent core 40 a. Since the weight per unit area of the adhesive that can be attached to the skin-side core wrap 40b is small, the skin-side core wrap 40b is likely to be unbonded to the absorbent core 40a, and the absorbent core 40 is less likely to be hardened on the skin-side surface. Therefore, the skin feel of the absorber 40 can be further improved. On the other hand, the core wrap layer 40b on the non-skin surface side and the absorbent core 40a are firmly bonded with the adhesive 30b having a large weight per unit area, and therefore, the shape retention of the absorbent body 40 is easily maintained. The weight per unit area of the adhesive is calculated by dividing the amount (mass) of the adhesive applied to a predetermined area of the absorbent core 40a or the core wrap 40b by the predetermined area. For example, the weight per unit area of the adhesive can be defined by a value obtained by dividing the total weight of the adhesive applied to the entire absorbent core 40a or core wrap 40b by the area of the absorbent core 40a or core wrap 40 b.
Preferably, at least a part of the back sheets 60 and 62 on the non-skin surface side of the absorbent core 40a is joined to the core wrap 40b in the region of the non-skin surface side compressed portion 80 b. In the present embodiment, at least a part of the leakage-preventing sheet 62 as the back sheet is joined to the core wrap 40b in the region of the non-skin-side compressed portion 80 b. Since the back sheets 60 and 62 are joined to the core wrap layer 40b in the region of the compressed portions 80 on the non-skin surface side of the absorber 40, the compressed portions 80 in a lattice shape are firmly formed on the non-skin surface side. This makes it easier to maintain the shape retention of the absorber 40, and further suppresses the deformation of the absorber 40.
More preferably, at least a part of the leakage-preventing sheet 62 is joined to the core wrap 40b in the region of the non-skin-surface-side compressed portion 80 b. The leakage-preventing sheet 62 may be formed of a sheet having higher rigidity than the nonwoven fabric, such as a liquid-impermeable film. In this case, the shape of the non-skin-side compressed portion 80b is firmly maintained on the non-skin-side of the absorber 40. This makes it easier to maintain the shape retention of the absorber 40.
The surface sheet 50 may not be joined to the core/clad layer 40b at least in the region of the compressed portion 80. In this case, since the top sheet 50 is easily lifted from the absorbent core 40a, it is difficult to feel irregularities due to the compressed portion 80 on the skin surface side, and therefore the skin feel can be further improved.
Preferably, in the cells 46 surrounded by the lattice-like compressed parts 80 of the absorbent body 40, the ratio of the maximum thickness of the absorbent core 40a to the maximum length of the cells 46 is 0.09 or more. A larger ratio of the maximum thickness of the absorbent core 40a relative to the maximum length of the cells 46 means a larger protrusion of the absorbent core 40a relative to the size of the cells 46. By setting this ratio to 0.09 or more, the lattice-shaped compressed portions 80 are firmly formed, and the shape retention of the absorber 40 is easily maintained. The thickness of the absorbent core 40a can be measured by cutting the absorbent body with a cutting machine in a state where the absorbent body is hardened with liquid nitrogen, and observing the cut cross section of the absorbent body with an electron microscope, for example.
Preferably, in the cells surrounded by the lattice-like compressed parts 80 of the absorbent body 40, the ratio of the maximum thickness of the absorbent core 40a to the maximum length of the cells 46 is 0.16 or less. The ratio of the maximum thickness of the absorbent core 40a to the maximum length of the cells 46 in the width direction W is preferably 0.16 or less, more preferably 0.15 or less. By setting this ratio to 0.16 or less, the absorbent core 40a of the cell 46 does not protrude excessively, and therefore, the core wrap layer 40b on the non-skin surface side can be prevented from coming off from the absorbent core 40 a. This firmly bonds the core wrap layer 40b on the non-skin surface side and the absorbent core 40a, and therefore the effect of suppressing the deformation of the absorber 40 is improved.
Table 1 below shows the measurement results of the sizes of the cells 46 defined by the compressed portions 80 and the bondability between the core wrap layer 40b and the absorbent core 40a at the non-skin-surface-side compressed portion 80 b. In examples 1 to 5 shown in table 1, the cells 46 formed by the compression part 80 were different in size and thickness. In examples 1 to 5, table 1 shows the maximum length W1 in the width direction of the cell 46 and the maximum thickness T1 of the cell 46.
In the non-skin surface side compressed portion 80b, the bondability of the core wrap layer 40b and the absorbent core 40a on the non-skin surface side was confirmed by an electron microscope. When the core layer 40b on the non-skin surface side was joined to the absorbent core 40a, the evaluation of the adhesiveness was indicated by "∘". On the other hand, when the bondability of the core wrap 40b and the absorbent core 40a on the non-skin surface side is decreased, that is, when a non-bonded region is observed, the evaluation of the bondability is indicated by "x".
[ Table 1]
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| T1 | 1.3 | 1.46 | 1.5 | 1.8 | 2 |
| W1 | 17 | 14.45 | 13.6 | 12.75 | 11.05 |
| T1/W1 | 0.0765 | 0.101 | 0.1103 | 0.1412 | 0.181 |
| Bonding property | ○ | ○ | ○ | ○ | × |
| Identifiability | × | ○ | ○ | ○ | ○ |
As shown in table 1 above, it can be seen that: the smaller the ratio of the maximum thickness T1 of the absorbent core to the maximum length W1 in the width direction W of the cells 46, the more firmly the core wrap 40b and the absorbent core 40a on the non-skin-surface side are joined. Specifically, the ratio of the maximum thickness T1 of the absorbent core to the maximum length W1 in the width direction W of the cells 46 may be preferably 0.16 or less, more preferably 0.15 or less, and still more preferably 0.14 or less.
Table 1 also shows the results of evaluating the visibility of the grid-like compressed parts 80 in each example. The identifiability is measured by sensory evaluation of a plurality of users. ". smallcircle" in table 1 indicates a case where the compression line EL of the absorber 40 can be recognized through the surface sheet 50 when the whole of the plurality of users is viewed from the skin surface side, and indicates a result of determining that the visibility is high. The "x" in table 1 indicates a case where the compressed line EL of the absorber 40 cannot be recognized through the top sheet 50 when some of the plurality of users are viewed from the skin surface side, and indicates a result of determining that the visibility is low. According to table 1, the ratio of the maximum thickness T1 of the absorbent core 40a to the maximum length W1 in the width direction of the cells 46 is preferably 0.09 or more, and more preferably 0.10 or more.
(3) Second embodiment
Next, an absorbent article according to a second embodiment will be described. Hereinafter, the same structure as that of the first embodiment may be omitted from description. In the second embodiment, the pattern of the compressed portions 80 formed in the absorber 40 is different from that of the first embodiment.
Fig. 5 is a diagram showing the pattern of compressed portions of the absorbent body of the second embodiment. Several of the plurality of compressed portions 80 are inclined in a grid-like manner with respect to the other compressed portions in the plurality of compressed lines. In the present embodiment, the intermittent portions 86 intermittently form the respective compression portions 80. In this way, the compression portion 80 may intermittently extend in a manner depicting a dotted line.
Instead of the above structure, the compression portion 80 may extend continuously in one direction. In this case, the compressing portions 80 are formed to divide the absorber into a plurality of sections of a substantially square shape.
(4) Third embodiment
Next, an absorbent article according to a third embodiment will be described. Hereinafter, the same structure as that of the first embodiment may be omitted from description. In the third embodiment, the pattern of the compressed portions 80 formed in the absorber 40 is different from that of the first embodiment.
Fig. 6 is a diagram showing the pattern of compressed portions of the absorbent body of the third embodiment. Several of the plurality of compressing parts 80 are inclined with respect to the other compressing parts of the plurality of compressing parts 80 in a lattice-forming manner. Each compression portion 80 extends in one direction while being bent in a wave shape.
As described in the first to third embodiments, it should be noted that the pattern of the compression portion 80 can be variously modified.
As described above, the contents of the present invention are disclosed by the embodiments, but the description and the drawings constituting a part of the disclosure should not be construed as limiting the present invention. Various alternative embodiments, examples, and operational techniques will be apparent to those skilled in the art from this disclosure. Therefore, the technical scope of the present invention is determined only by the specific matters of the invention according to the claims described above.
Further, the entire contents of japanese patent application No. 2018-125569, filed on 29.6.2018, are incorporated by reference into the present specification.
Industrial applicability
According to the above aspect, an absorbent article can be provided that can suppress the deformation of the absorbent body by the compression section and improve the tactile sensation of the skin.
Description of reference numerals
10 absorbent article
40 absorbent body
40a absorbent core
40b core cladding
50 surface sheet
60 leakproof sheet
62 non-skin surface sheet
80 compression part
80a skin surface side compressed part
80b non-skin surface side compressed part
Claims (10)
1. An absorbent article having:
an absorbent body; and
a compressed part formed by compressing the absorbent body,
the absorbent body has an absorbent core and a core cladding covering the absorbent core,
the compressed parts are formed in a lattice shape in the absorbent body, wherein,
in the absorbent article, in a region overlapping the compressed portion in a plan view, a joint portion where the core wrap on the non-skin surface side of the absorbent core is joined to the absorbent core and a non-joint portion where the core wrap on the skin surface side of the absorbent core is not joined to the absorbent core are provided.
2. The absorbent article of claim 1,
the compressed parts are formed on the skin surface side and the non-skin surface side of the absorber,
the depth of the compressed portion formed on the skin surface side of the absorbent body is larger than the depth of the compressed portion formed on the non-skin surface side of the absorbent body.
3. The absorbent article according to claim 1 or 2, wherein,
the core wrap layer on the skin surface side of the absorbent core has a lower elongation than the core wrap layer on the non-skin surface side of the absorbent core.
4. The absorbent article according to any one of claims 1 to 3, wherein,
an adhesive is disposed between the absorbent core and the core cladding,
the weight per unit area of the adhesive on the skin surface side of the absorbent core is smaller than the weight per unit area of the adhesive on the non-skin surface side of the absorbent core.
5. The absorbent article according to any one of claims 1 to 4, wherein,
in the cells surrounded by the lattice-shaped compressed parts of the absorbent body, the ratio of the maximum thickness of the absorbent core to the maximum length of the cells is 0.09 or more.
6. The absorbent article according to any one of claims 1 to 5, wherein,
in the cells surrounded by the lattice-shaped compressed parts of the absorbent body, the ratio of the maximum thickness of the absorbent core to the maximum length of the cells is 0.16 or less.
7. The absorbent article according to any one of claims 1 to 6, wherein,
the non-joined region between the core wrap and the absorbent core on the skin surface side of the absorbent core is larger than the non-joined region between the core wrap and the absorbent core on the non-skin surface side of the absorbent core.
8. The absorbent article according to any one of claims 1 to 7, wherein,
the compressed parts are formed on the skin surface side and the non-skin surface side of the absorber,
in the region of the compressed portion, at least a part of a non-joined portion where the core wrap and the absorbent core are not joined on the skin surface side with respect to the absorbent core is provided so as to face a joined portion where the core wrap and the absorbent core are joined on the skin surface side with respect to the absorbent core.
9. The absorbent article according to any one of claims 1 to 8, wherein,
the compressed parts are formed on the skin surface side and the non-skin surface side of the absorber,
the absorbent article has a back sheet positioned on the non-skin side of the absorbent body,
in the region of the compressed portion on the non-skin surface side, at least a portion of the back sheet on the non-skin surface side of the absorbent core is joined to the core wrap.
10. The absorbent article according to any one of claims 1 to 9, wherein,
the compressed parts are formed on the skin surface side and the non-skin surface side of the absorber,
an indicator for discriminating the presence or absence of urine adhering to the absorbent body is provided on the non-skin surface side of the absorbent body,
at least a part of the indicator is disposed in close contact with the compression portion on the non-skin surface side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-125569 | 2018-06-29 | ||
| JP2018125569A JP6952016B2 (en) | 2018-06-29 | 2018-06-29 | Absorbent article |
| PCT/JP2019/025324 WO2020004446A1 (en) | 2018-06-29 | 2019-06-26 | Absorbent article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112334112A true CN112334112A (en) | 2021-02-05 |
| CN112334112B CN112334112B (en) | 2022-04-29 |
Family
ID=68984874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980043969.8A Expired - Fee Related CN112334112B (en) | 2018-06-29 | 2019-06-26 | Absorbent article |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6952016B2 (en) |
| CN (1) | CN112334112B (en) |
| BR (1) | BR112020026514A2 (en) |
| SA (1) | SA520420911B1 (en) |
| WO (1) | WO2020004446A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7532203B2 (en) | 2020-10-22 | 2024-08-13 | 花王株式会社 | Absorbent articles |
| JP2023085129A (en) * | 2021-12-08 | 2023-06-20 | ユニ・チャーム株式会社 | Absorbent article and indicator composition |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003275240A (en) * | 2002-03-25 | 2003-09-30 | Daio Paper Corp | Absorptive article |
| CN103561702A (en) * | 2011-05-20 | 2014-02-05 | 尤妮佳股份有限公司 | Absorbent article |
| CN205163406U (en) * | 2014-10-27 | 2016-04-20 | 花王株式会社 | Absorbent product |
| US20160346136A1 (en) * | 2015-05-29 | 2016-12-01 | The Procter & Gamble Company | Absorbent articles having channels and wetness indicator |
| WO2017002492A1 (en) * | 2015-06-29 | 2017-01-05 | ユニ・チャーム株式会社 | Absorbent article |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6117408B1 (en) * | 2016-06-03 | 2017-04-19 | ユニ・チャーム株式会社 | Urine pad |
| JP2017217078A (en) * | 2016-06-03 | 2017-12-14 | 花王株式会社 | Absorbent article |
| JP6838950B2 (en) * | 2016-12-02 | 2021-03-03 | 花王株式会社 | Sheet folding device and manufacturing method of absorber using it |
-
2018
- 2018-06-29 JP JP2018125569A patent/JP6952016B2/en active Active
-
2019
- 2019-06-26 BR BR112020026514-4A patent/BR112020026514A2/en not_active Application Discontinuation
- 2019-06-26 WO PCT/JP2019/025324 patent/WO2020004446A1/en active Application Filing
- 2019-06-26 CN CN201980043969.8A patent/CN112334112B/en not_active Expired - Fee Related
-
2020
- 2020-12-28 SA SA520420911A patent/SA520420911B1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003275240A (en) * | 2002-03-25 | 2003-09-30 | Daio Paper Corp | Absorptive article |
| CN103561702A (en) * | 2011-05-20 | 2014-02-05 | 尤妮佳股份有限公司 | Absorbent article |
| CN205163406U (en) * | 2014-10-27 | 2016-04-20 | 花王株式会社 | Absorbent product |
| US20160346136A1 (en) * | 2015-05-29 | 2016-12-01 | The Procter & Gamble Company | Absorbent articles having channels and wetness indicator |
| WO2017002492A1 (en) * | 2015-06-29 | 2017-01-05 | ユニ・チャーム株式会社 | Absorbent article |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112334112B (en) | 2022-04-29 |
| BR112020026514A2 (en) | 2021-03-23 |
| WO2020004446A1 (en) | 2020-01-02 |
| JP6952016B2 (en) | 2021-10-20 |
| JP2020000747A (en) | 2020-01-09 |
| SA520420911B1 (en) | 2023-11-19 |
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