WO2024024183A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
- Publication number
- WO2024024183A1 WO2024024183A1 PCT/JP2023/015043 JP2023015043W WO2024024183A1 WO 2024024183 A1 WO2024024183 A1 WO 2024024183A1 JP 2023015043 W JP2023015043 W JP 2023015043W WO 2024024183 A1 WO2024024183 A1 WO 2024024183A1
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- WO
- WIPO (PCT)
- Prior art keywords
- low liquid
- absorbent core
- absorbent article
- absorbent
- skin side
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
-
- 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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/537—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/53708—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53717—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 an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the horizontal direction
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/535—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
- A61F13/536—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes 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
- A61F13/84—Accessories, not otherwise provided for, for absorbent pads
-
- 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
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
- A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
- A61F2013/15463—Absorbency
- A61F2013/15471—Total capacity
-
- 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
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
- A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
- A61F2013/15544—Permeability
- A61F2013/1556—Water permeability
-
- 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
- A61F2013/530802—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 characterized by the foam or sponge other than superabsorbent
- A61F2013/530846—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 characterized by the foam or sponge other than superabsorbent being hydrophobic
-
- 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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/535—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
- A61F2013/5355—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes with terraced core
-
- 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
- A61F13/84—Accessories, not otherwise provided for, for absorbent pads
- A61F2013/8473—Accessories, not otherwise provided for, for absorbent pads for diagnostic purposes
Definitions
- the present invention relates to absorbent articles.
- Patent Document 1 discloses an absorbent article having a low liquid permeation section.
- the low liquid permeability portion of Patent Document 1 is provided in the top sheet.
- the top sheet is made of a spunlace non-woven fabric made of 100% cotton fibers coated with a water repellent, and has a large number of holes extending in the longitudinal direction of the absorbent article, at least in the area corresponding to the excretion opening, penetrating the front and back sides. It is formed in a vertically elongated shape.
- the area to which the water repellent agent has been applied has a lower water absorption on the skin-contacting surface, and its ability to absorb body fluids is lower than that of the surrounding area.
- by guiding body fluids to the non-skin side through the holes it is possible to prevent fluids from remaining on the top sheet.
- the above-mentioned absorbent article had the following problems.
- the body fluids discharged onto the topsheet the body fluids guided to the non-skin side through the openings do not remain on the topsheet, thereby suppressing fluid residue on the topsheet.
- the body fluid on the area to which the water repellent agent has been applied is difficult to be drawn into the top sheet, and the body fluid is likely to accumulate on the top sheet. Therefore, there is a risk of skin trouble due to body fluids remaining on the top sheet.
- the absorbent core changes its rigidity and thickness as it absorbs body fluids.
- the absorbent core after absorbing body fluids may not be able to maintain its rigidity or thickness compared to the absorbent core before absorption, and may not be able to maintain the desired state until after use.
- the present invention was made in view of these problems, and aims to provide an absorbent article that can easily maintain the absorbent performance of the absorbent core while suppressing liquid residue on the top sheet.
- An absorbent article includes a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent core disposed between the topsheet and the backsheet.
- a low liquid permeation portion is provided on the non-skin side of the top sheet and on the skin side of the non-skin side of the absorbent core, in which body fluid transfers from the skin side to the non-skin side at a lower speed than the surrounding area. ing.
- the low liquid permeation portion is arranged in a central region located at the center in the width direction of the regions obtained by dividing the absorbent core into three equal parts in the width direction.
- An absorbent article includes a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent core disposed between the topsheet and the backsheet.
- a low liquid permeation portion is provided on the non-skin side of the top sheet and on the skin side of the non-skin side of the absorbent core, in which body fluid transfers from the skin side to the non-skin side at a lower speed than the surrounding area. ing.
- the low liquid permeation section is provided in the absorbent core.
- the amount of absorption per unit area of the absorbent core provided with the low liquid permeable portion is lower than the amount of absorption per unit area of the absorbent core surrounding the low liquid permeable portion.
- the region where the low liquid permeation portion is provided has a higher rigidity than the region surrounding the low liquid permeation portion.
- FIG. 1 is a plan view of an absorbent article according to an embodiment as seen from the skin side.
- FIG. 2 is a plan view of the absorbent article according to the embodiment as seen from the non-skin side.
- FIG. 3 is a cross-sectional view taken along line AA shown in FIG.
- FIG. 4 is a sectional view taken along line BB shown in FIG.
- FIG. 5 is a diagram showing an absorbent article according to a modified example.
- the invention according to aspect 1 is an absorbent article having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent core disposed between the topsheet and the backsheet.
- a low liquid permeation portion is provided on the non-skin side of the top sheet and on the skin side of the non-skin side of the absorbent core, in which body fluid transfers from the skin side to the non-skin side at a lower speed than the surrounding area.
- the low liquid permeation portion is arranged in a central region located at the center in the width direction of the regions obtained by dividing the absorbent core into three equal parts in the width direction.
- the low liquid permeation area has a lower transfer rate of body fluid to the non-skin side than the surrounding area, and it is difficult for body fluid to transfer to the non-skin side compared to the surrounding area.
- the low liquid permeability portion is located closer to the skin than the non-skin surface of the absorbent core.
- body fluids are not easily guided to the absorbent cores located on the non-skin side of the low liquid permeable portion, and the amount of body fluids absorbed is reduced.
- the absorbent core changes its rigidity and thickness as it absorbs body fluids.
- the absorbent core after absorbing body fluids may not be able to maintain its rigidity or thickness compared to the absorbent core before absorption, and may not be able to maintain the desired state until after use.
- the absorbent core can be provided with a portion that can suppress changes in the absorbent core before and after absorbing body fluids. Body fluids are easily drained from the central region of the absorbent core, and changes due to absorption of body fluids are large. By providing the low liquid permeation portion in the central region, it becomes easier to maintain the state before use even after use.
- the ability to draw body fluids can be ensured in the top sheet or the like disposed closer to the skin than the low liquid permeable portion, and liquid residue on the surface of the absorbent article can be suppressed. Therefore, skin troubles caused by body fluids remaining on the surface of the absorbent article can be suppressed.
- the invention according to aspect 2 may have the following features in the invention according to aspect 1.
- the region where the low liquid permeation portion is provided has a higher rigidity than the region surrounding the low liquid permeation portion. Since the region provided with the low liquid permeation portion has higher rigidity than the surrounding area, deformation due to pressure from the body during wear is reduced, making it easier to maintain the state before wear.
- the low liquid permeability portion is located on the non-skin side of the top sheet and is unlikely to come into direct contact with the wearer's skin. Because the rigidity of the top sheet is lower than that of the low liquid permeation area, even if the low liquid permeation area itself has increased rigidity, the softness of the top sheet makes it difficult for the wearer to feel the increased rigidity. , it is possible to suppress discomfort while wearing it.
- the invention according to aspect 3 is an absorbent article having a liquid-permeable topsheet, a liquid-impermeable backsheet, and an absorbent core disposed between the topsheet and the backsheet.
- a low liquid permeation portion is provided on the non-skin side of the top sheet and on the skin side of the non-skin side of the absorbent core, in which body fluid transfers from the skin side to the non-skin side at a lower speed than the surrounding area. ing.
- the low liquid permeation section is provided in the absorbent core.
- the amount of absorption per unit area of the absorbent core provided with the low liquid permeable portion is lower than the amount of absorption per unit area of the absorbent core surrounding the low liquid permeable portion.
- the region where the low liquid permeation portion is provided has a higher rigidity than the region surrounding the low liquid permeation portion. Since the amount of absorption per unit area in the area where the low liquid permeation area is provided is low, by providing the low liquid permeation area, the area that can suppress changes in the absorbent core before and after absorbing body fluids is added to the absorbent core. can be provided. Furthermore, since the region provided with the low liquid permeability portion has higher rigidity than the surrounding area, deformation due to pressure from the body during wear is reduced, making it easier to maintain the state before wear. In addition, the low liquid permeability portion is located on the non-skin side of the top sheet and is unlikely to come into direct contact with the wearer's skin.
- the rigidity of the top sheet is lower than that of the low liquid permeation area, so the wearer can feel the increased rigidity due to the softness of the top sheet. This reduces discomfort while wearing it.
- the invention according to aspect 4 may have the following features in the invention according to any one of aspects 1 to 3.
- the low liquid permeability section is constituted by a liquid impermeable sheet placed closer to the skin than the absorbent core. According to this aspect, absorption of body fluid from the skin side is suppressed by the liquid-impermeable sheet, and the rigidity of the absorbent core in the region overlapping with the sheet can be ensured.
- the invention according to aspect 5 may have the following features in the invention according to any one of aspects 1 to 3.
- the low liquid permeation portion is constituted by a hydrophobic coating agent applied to at least one of the absorbent core, the top sheet, and a sheet disposed between the absorbent core and the top sheet. According to this aspect, absorption of body fluids from the skin side is suppressed by the hydrophobic coating agent, and the rigidity of the absorbent core in the region overlapping with the coating agent can be ensured.
- the invention according to aspect 6 may have the following features in the invention according to any one of aspects 1 to 3.
- the low liquid permeation section is configured by at least a compressed section that compresses the absorbent core in the thickness direction.
- the low liquid permeation section consisting of the compressed section has high rigidity and can ensure the rigidity of the absorbent core.
- the invention according to aspect 7 may have the following features in the invention according to any one of aspects 1 to 3.
- the low liquid permeation section is provided between the top sheet and the absorbent core. According to this aspect, it is possible to suppress the absorption of body fluids in the absorbent core at least in the area overlapping with the low liquid permeable part, and since the low liquid permeable part and the absorbent core are provided separately, the absorption performance of the absorbent core is ensured. Easy to do.
- the invention according to aspect 8 may have the following features in the invention according to any one of aspects 1 to 3.
- the low liquid permeation section is provided in the absorbent core. According to this aspect, the existence of the low liquid permeation portion makes it difficult for the absorbent core to absorb the liquid, and the rigidity of the absorbent core can be maintained.
- the invention according to aspect 9 may have the following features in the invention according to any one of aspects 1 to 3.
- the absorbent article has a second sheet disposed between the top sheet and the absorbent core.
- the low liquid permeation portion is provided between the top sheet and the second sheet.
- the low liquid permeability portion can be provided at a position away from the absorbent core, reducing the possibility that the absorbent core absorbs body fluids, and further reducing changes in the rigidity of the absorbent core before and after absorbing body fluids. can do.
- the invention according to aspect 10 may have the following features in the invention according to any one of aspects 1 to 9.
- the low liquid permeation portion straddles the center of the absorbent core in the width direction.
- the widthwise center of the absorbent core is the part where force tends to concentrate, such as when the absorbent core is pinched between legs.
- the widthwise center of the absorbent core is a region from which body fluids are likely to be drained.
- the invention according to aspect 11 may have the following features in the invention according to any one of aspects 1 to 10.
- the low liquid permeation portion extends in the front-rear direction.
- body fluid can be diffused in the front-back direction by the low-liquid permeability portion, and body fluid can be absorbed in a wide area in the front-back direction.
- the absorption range of body fluid it is possible to suppress the formation of a region that retains a large amount of body fluid locally, and it is easy to maintain the rigidity of the absorbent core.
- the invention according to aspect 12 may have the following features in the invention according to aspect 11.
- a plurality of the low liquid permeable portions are provided at intervals in the width direction.
- the low liquid permeable parts are arranged at intervals in the width direction, and there is a region between the low liquid permeable parts in which no low liquid permeable part is arranged. Even if the low liquid permeable part located on the outside in the width direction deforms when a force directed inward in the width direction is applied by a leg, etc., the low liquid permeable part located on the inside in the width direction does not deform.
- the performance of the low liquid permeation part can be maintained by any of the low liquid permeation parts.
- the invention according to aspect 13 may have the following features in the invention according to any one of aspects 1 to 10.
- a plurality of the low liquid permeable parts extend in the width direction and are arranged at intervals in the front-rear direction.
- the low liquid permeable parts are arranged at intervals in the front-rear direction, and there is a region between the low liquid permeable parts in which no low liquid permeable part is arranged. Even if the absorbent article is placed along the roundness of the body from the front to the back of the body, the low liquid permeable parts can demonstrate their performance without deforming, and any of the low liquid permeable parts can The performance of the low liquid permeation section can be maintained.
- the low liquid permeable part diffuses the body fluid in the width direction, so that the body fluid can be absorbed in a wide area in the width direction. Further, in a configuration in which the low liquid permeable portion has high rigidity, the low liquid permeable portion can counter forces from the legs and suppress excessive deformation of the absorbent core.
- the invention according to aspect 14 may have the following features in the invention according to any one of aspects 1 to 13.
- the length of the low liquid permeation portion in the width direction is 50% or less of the length of the absorbent core in the width direction. According to this aspect, since the length of the low liquid permeable portion in the width direction is 50% or less of the entire width of the absorbent core, the low liquid permeable portion is unlikely to come into contact with the wearer's feet or the like and will not be subjected to direct force. This makes it easier to maintain the shape of the low liquid permeation part.
- the length of the low liquid permeable part in the width direction is too long, the ratio of the low liquid permeable part will increase, the ability to draw body fluid into the absorbent core will decrease, and there is a risk of leakage such as transmission leakage. There is.
- the length of the low liquid permeable portion in the width direction is 50% or less of the entire widthwise area of the absorbent core, the ability to draw in body fluids in other regions can be ensured and leakage can be suppressed.
- the invention according to aspect 15 may have the following features in the invention according to any one of aspects 1 to 14.
- the low liquid permeation portion is provided in an excretion opening facing area that is arranged to face the wearer's excretion opening.
- the area facing the excretory opening is the part where body fluids are most easily guided and absorbed.
- the invention according to aspect 16 may have the following features in the invention according to any one of aspects 1 to 14.
- the low liquid permeation portion is provided so as not to straddle the center in the front-rear direction.
- the low liquid permeation area is provided so as not to straddle the center of the absorbent article in the front-back direction, so it can absorb body fluids at the center of the absorbent article in the front-back direction where a relatively large amount of body fluid is discharged. It is possible to suppress a feeling of discomfort caused by a decrease in retractability.
- the low liquid permeable part is located in front of the center of the absorbent core in the longitudinal direction, the user is likely to notice the existence of the low liquid permeable part when operating or wearing the absorbent core.
- the invention according to aspect 17 may have the following features in the invention according to any one of aspects 1 to 16.
- a test member for testing the health condition of the wearer is disposed in a region that overlaps with the low liquid permeable part on the non-skin side of the low liquid permeable part.
- the test member by arranging the test member in a region that overlaps with the low liquid permeation portion, it is possible to avoid excessive body fluid coming into contact with the test member and suppress erroneous reactions.
- the low liquid permeation portion has a structure that does not easily twist, it is possible to avoid applying excessive pressure to the testing member, and it is possible to avoid the occurrence of creases in the testing member.
- the absorbent article 1 may be an absorbent article such as a sanitary napkin, a panty liner, an incontinence pad, a fecal pad, a disposable diaper, a shorts-type napkin, or the like.
- the absorbent article 1 may be an article that is used by being attached to a wearing article such as underwear, or may be an absorbent article that is used without being attached to a wearing article.
- the absorbent article 1 of the embodiment is a panty liner.
- the same or similar parts are given the same or similar symbols.
- the drawings are schematic and the ratio of each dimension may differ from the actual one. Therefore, specific dimensions etc. should be determined with reference to the following explanation.
- the drawings may include portions with different dimensional relationships and ratios. Further, in the cross-sectional view, each component is shown separated for convenience of explanation, but in an actual product, each component is in contact with each other.
- FIG. 1 is a plan view of the absorbent article 1 viewed from the skin side T1.
- FIG. 2 is a plan view of the absorbent article 1 viewed from the non-skin side T2.
- FIG. 3 is a cross-sectional view taken along line AA shown in FIG.
- FIG. 4 is a sectional view taken along line BB shown in FIG.
- the "skin side” corresponds to the side facing the wearer's skin during use.
- “Non-skin side” corresponds to the side that is turned away from the wearer's skin during use.
- the absorbent article 1 has a front-back direction L, a width direction W, and a thickness direction T that are orthogonal to each other. In the front-rear direction L of the absorbent article 1, the side that contacts the user's lower abdomen is referred to as the "front side", and the side that contacts the user's buttocks is referred to as the "rear side”.
- the absorbent article 1 has a front region S1, a rear region S2, and a crotch region S3.
- the crotch area S3 includes an excretory opening facing area S5 that is arranged to face the wearer's excretory opening, for example, the vaginal opening.
- the crotch region S3 is a region located under the crotch of the wearing article when the absorbent article 1 is attached to the wearing article, and between the wearer's legs.
- the front side region S1 is located in front of the crotch region S3.
- the front edge of the front side region S1 defines the front edge of the absorbent article 1.
- the rear region S2 is located further back than the crotch region S3.
- the rear edge of the rear region S2 defines the rear edge of the absorbent article 1.
- the crotch area S3 includes an excretion opening facing area S5 that comes into contact with the wearer's excretion opening.
- the crotch region S3 may be a region where the wings are provided, and in the case where the absorbent core has a constricted portion that is constricted inward in the width direction, the constricted portion may be a region provided with the wings. It may be a provided area.
- the crotch region S3 may be a region located in the center of a region obtained by dividing the absorbent article into three equal parts in the front-rear direction L.
- the excretory opening facing area S5 is an area facing the vaginal opening and the urinary opening as the excretory opening, and straddles the center of the absorbent core 31 in the width direction W.
- the excretion opening facing area S5 does not have to be arranged to actually face the excretion opening of the wearer, but may be a region arranged to face the excretion opening of the wearer due to design.
- the outer portion in the present invention 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 the outer edge in the width direction W.
- the outer edge of a component that occupies a certain range in the front-rear direction is an edge that connects points located on the outer side of the component in the width direction over the entire component.
- the inner part in the present invention is a part occupying a certain range in the width direction W including the inner edge in the width direction W, and the inner edge is the inner edge in the width direction W.
- the inner edge of a component that occupies a certain range in the front-rear direction is an edge that connects points located on the inner side of the component in the width direction over the entire component.
- the front end portion and the rear end portion in the present invention are portions occupying a certain range in the front-rear direction L including the edge in the front-rear direction L, and the front end edge and the rear end edge are edges in the front-rear direction L.
- the outer edge includes a front edge and a rear edge, and the outer edge includes a front edge and a rear edge.
- the inner side is a side that includes the inner edge and extends along the front-rear direction L.
- the outer side is a side that includes the outer edge and extends along the front-rear direction L.
- the term “along the front-back direction L” means a direction with an angle of less than 45 degrees with respect to the front-back direction L
- the term “along the width direction W” It means a direction having an angle of less than 45° with respect to the width direction W.
- the absorbent article 1 has at least an absorbent core 31, a top sheet 10, and a back sheet 20.
- the absorbent article 1 has a vertically long shape.
- the top sheet 10 is a liquid permeable sheet.
- the top sheet 10 may be configured to cover the entire skin surface of the absorbent article 1 with one sheet as in this embodiment, or may include a center sheet that covers the center of the absorbent core 31 in the width direction W; It may also include a side seat arranged on the outer side of the center seat in the width direction W.
- the top sheet 10 is made of any sheet-like material having a liquid-permeable structure, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, a mesh sheet, or the like.
- the back sheet 20 is arranged on the non-skin side T2 than the absorbent core 31, and is a liquid-impermeable sheet.
- the back sheet 20 is a liquid-impermeable sheet.
- the back sheet 20 may be a polyethylene sheet, a laminated nonwoven fabric mainly made of polypropylene, a breathable resin film, spunbond, or a sheet in which a breathable resin film is bonded to a nonwoven fabric such as spunlace.
- the absorbent core 31 constitutes an absorbent body.
- the absorbent core 31 may be constructed of an absorbent material that absorbs liquid.
- the absorbent material constituting the absorbent core 31 can be formed from, for example, hydrophilic fibers, pulp, and super absorbent polymers (SAP).
- SAP super absorbent polymers
- the absorbent body may have a core wrap sheet that covers the absorbent core 31, or may not have a core wrap sheet as in this embodiment.
- the absorbent core 31 has regions obtained by dividing the absorbent core 31 into three equal parts in the width direction W.
- the area divided into three equal parts may include a central area RC located at the center in the width direction W, and side areas RS located outside the central area RC in the width direction W.
- the absorbent article 1 may have an adhesive part 60 for fixing the absorbent article 1 to a wearing article such as underwear.
- the adhesive portion 60 is a region provided on the non-skin side T2 of the backsheet 20, and provided with a fastening means for fastening the absorbent article 1 to a wearable article.
- the adhesive portions 60 may extend in the width direction W, and may be provided in plural numbers at intervals in the front-rear direction L. Further, in a modification, a plurality of adhesive parts 60 may be provided extending in the front-rear direction L and spaced apart in the width direction W.
- the absorbent article 1 of this embodiment is configured to easily maintain the absorbent performance of the absorbent core 31 while suppressing liquid residue on the top sheet 10.
- the structure for making it easier to maintain the absorption performance of the absorbent core 31 while suppressing the liquid remaining on the top sheet 10 can be roughly divided into a first form and a second form.
- the absorbent article 1 of the first form and the second form both have a low liquid permeation section 100.
- the low liquid permeability section 100 is configured to prevent bodily fluids from flowing from the skin side T1 to the non-skin side T2 rather than the surrounding area at a non-skin side T2 of the top sheet 10 and a skin side T1 of the absorbent core 31 from the non-skin side. This is a part configured to have a low transition speed.
- the low liquid permeability portion 100 is a portion where the transfer rate of body fluid from the skin side T1 to the non-skin side T2 is lower than the surrounding areas (the area adjacent to the width direction W and the area adjacent to the front-rear direction L) in plan view. It is.
- the low liquid permeability section 100 has a configuration in which the body fluid absorption rate is low by having a low body fluid drawing ability, and a body fluid absorption rate is low by making it difficult for the drawn body fluid to transfer to the non-skin side T2. It can be broadly divided into composition and composition. Therefore, for identifying the low liquid permeation portion 100, for example, the following first identifying method and second identifying method can be used.
- the first identification method is a method of identifying a low liquid permeation section 100 that has a low ability to draw in body fluids.
- the low liquid permeability section 100 is provided between the non-skin surface of the top sheet 10 and the non-skin surface of the absorbent core 31.
- identifying the low liquid permeation section 100 first remove the top sheet 10 from the absorbent article 1, and remove the member (in this embodiment, the back sheet 20) on the non-skin side T2 from the non-skin surface of the absorbent core 31. remove.
- a member hereinafter referred to as a target member
- the target member is disassembled into each material as much as possible.
- examples of the materials include the absorbent core 31, core wrap sheet, second sheet, sheets other than these (eg, resin film), adhesives, and water repellents.
- the materials are joined together, they are cooled or heated during disassembly to release the bonded state of the adhesive, etc., and then disassembled. Furthermore, since materials coated with adhesives, water repellents, etc. cannot be taken out individually, they must be made into some kind of material.
- Each material taken out from the target member is placed on a flat surface, and one drop of the pseudo body fluid is dropped onto the skin side T1 surface of each material. If the time the simulated body fluid remains in a bead shape on the material is 60 seconds or more, the material is determined to be a low liquid permeation section 100 because it is difficult for the material to draw in the body fluid.
- the simulated body fluid is drawn into the material in less than 60 seconds, if it remains on the material for more than 60 seconds but loses its bead shape in less than 60 seconds, the material is in a low liquid permeation area. It is determined that it is not 100.
- the second identification method identifies the low liquid permeability portion 100 in which the drawn body fluid is difficult to transfer to the non-skin side T2.
- a target member is taken out.
- the second identification method identifies the target member in its state without disassembling the target member into each material. Whether or not it is difficult to move to the non-skin side T2 depends on whether the speed is low relative to the surroundings, so the target member is divided into regions.
- a line is drawn on the non-skin surface of the target member using an ink that does not smear with body fluids (for example, oil-based ink), and a region of 50 mm x 50 mm is divided.
- the target member is placed in a floating state so that the non-skin surface of the target member can be visually recognized.
- a plurality of string-like members for example, a plurality of resin threads
- the target member is placed on the string-like members.
- 5 ml of the pseudo body fluid is dropped onto the skin-side T1 surface of the material. Observe from the non-skin side T2 of the target member. If the arrival time of bodily fluids to an arbitrary section is slower than that of the surrounding sections, it is determined that the low fluid permeation section 100 is provided in the arbitrary section because the arrival speed is slow relative to the surroundings.
- the low liquid permeation section 100 is provided in the section with a long time, but preferably, the arrival time of the first section and the second section are When compared with the arrival time of the first section, if the arrival time is 1.2 times or more than the short time, it may be determined that the low liquid permeation section 100 is provided in the long time section, or the first When comparing the arrival time of the compartment and the arrival time of the second compartment, if the difference from the short time is 5 seconds or more, it is determined that the low liquid permeation section 100 is provided in the long time compartment. Good too.
- artificial menstrual blood can be used as the simulated body fluid.
- Artificial menstrual blood was prepared by mixing appropriate amounts of ionized water, glycerin, sodium carbomethylcellulose, sodium chloride, sodium bicarbonate, dye red No. 102, dye red No. 2, and dye yellow No. 5 (each dye was manufactured by Marubeni Shokai Co., Ltd.). can use things.
- the viscosity of the simulated body fluid may be about 22 to 26 mPa ⁇ s. The viscosity can be measured using a viscosity meter (Vismetron model VGA-4 manufactured by Shibaura System Co., Ltd.).
- the absorbent article 1 of this embodiment includes, from the skin side T1 toward the non-skin side T2, a top sheet 10, an HMA (hot melt) adhesive 71, a resin film 50, HMA type adhesive 71, absorbent core 31, HMA type adhesive 71, back sheet 20, and adhesive part 60 are arranged. Therefore, the target member includes at least the resin film 50, the HMA adhesive 71, and the absorbent core 31, although this depends on the arrangement of the HMA adhesive in contact with the top sheet 10 and the back sheet 20 at the time of disassembly.
- the second identification method By implementing the second identification method in the state of the target member, it is found that the arrival speed of the section where the resin film 50 is arranged is slow, and the low liquid permeation section 100 is provided in the area where the resin film 50 is arranged. It can be determined that Alternatively, by implementing the first identifying method, it can be determined that the resin film 50 has a low body fluid drawing ability and that the resin film 50 constitutes the low liquid permeation section 100.
- the first embodiment is characterized in that the low liquid permeability section 100 is arranged in the central region RC.
- the low liquid permeability portion 100 has a lower transfer rate of body fluid to the non-skin side T2 than the surrounding area, and is more difficult to transfer body fluid to the non-skin side T2 than the surrounding area.
- the low liquid permeability portion 100 is located closer to the skin side T1 than the non-skin surface of the absorbent core 31.
- the absorbent cores 31 located on the non-skin side T2 with respect to the low liquid permeable portion 100 are less likely to be guided by body fluids, and the amount of absorbed body fluids is reduced.
- the low liquid permeability section 100 when the low liquid permeability section 100 is provided on the non-skin surface of the absorbent core, absorption of body fluids can be suppressed within a certain range from the non-skin surface of the absorbent core 31 toward the skin side T1.
- the absorbent core 31 changes its rigidity and thickness as it absorbs body fluids.
- the absorbent core 31 after absorbing body fluids may not be able to maintain its rigidity or thickness compared to the absorbent core 31 before absorption, and may not be able to maintain the desired state until after use.
- a portion can be provided in the absorbent core 31 that can suppress changes in the absorbent core 31 before and after absorbing body fluid.
- Body fluid is more easily discharged from the central region RC of the absorbent core 31 than from the side regions RS, and changes due to absorption of body fluid are large.
- the low liquid permeation portion 100 in the central region RC, it becomes easier to maintain the state before use even after use. Further, the ability to draw body fluids is ensured in the top sheet 10 and the like disposed closer to the skin T1 than the low liquid permeable portion 100, and liquid residue on the surface of the absorbent article 1 can be suppressed. Therefore, skin troubles caused by body fluids remaining on the surface of the absorbent article 1 can be suppressed.
- the absorbent article 1 of this embodiment has the configuration of the first embodiment, and the resin film 50 constituting the low liquid permeation section 100 is provided in the central region RC.
- the low liquid permeation section 100 only needs to be provided in at least a part of the central region RC, and may be provided in a part of the central region RC in the width direction W. It may be provided over the entire width direction W of the RC. Furthermore, the low liquid permeation section 100 may be provided in both the central region RC and the side regions RS.
- the low liquid permeable portion 100 is provided in the absorbent core 31, and the absorption amount per unit area of the area where the low liquid permeable portion 100 is provided is the unit of the area around the low liquid permeable portion 100. It is characterized in that the absorption amount per area is lower than that, and the rigidity of the region where the low liquid permeation section 100 is provided is higher than the rigidity of the region around the low liquid permeation section 100. Since the absorption amount per unit area of the area in which the low liquid permeable part 100 is provided is low, the area where the low liquid permeable part 100 is provided can suppress changes in the absorbent core 31 before and after absorbing body fluid. It can be provided in the core 31.
- the low liquid permeable portion 100 is provided in the region where the low liquid permeable portion 100 is provided is higher than the surrounding area, deformation due to pressure from the body when worn is reduced, making it easier to maintain the state before wearing. Furthermore, the low liquid permeability section 100 is located on the non-skin side T2 of the top sheet 10, and is unlikely to come into direct contact with the wearer's skin. Since the rigidity of the top sheet 10 is lower than that of the low liquid permeable part 100, even if the low liquid permeable part 100 itself has a high rigidity, the softness of the top sheet 10 makes it possible to wear the part with increased rigidity. This makes it difficult for the wearer to feel the wearer's skin, thereby suppressing discomfort and skin problems while wearing the wearer.
- the absorption capacity per unit area can be measured by the following method. First, the absorbent core 31 is taken out, sectioned into 10 mm x 10 mm areas, and cut into each section to create a test piece. Measure the weight and plan view dimensions of each test piece. Immerse each specimen entirely in simulated body fluid. The same simulated body fluid as described above can be used. After 60 seconds have elapsed, each test piece is taken out and left for 1 minute on a wire mesh or the like. The weight of the test piece is then measured. The absorption amount per unit area is determined by this method. In addition, if the basis weight of the water-absorbing fibers of the test piece is not uniform, the absorption capacity, which can be calculated by (weight after absorption - weight before absorption) / (weight before absorption), may be compared as the absorption amount.
- the stiffness may be Gurley stiffness, and can be measured, for example, by the following method.
- the equipment used is from Yasuda Seiki Ltd. Gurley's Stiffness Tester manufactured by , Inc. is used.
- set the sample in the instrument so that the upper end of the sample is located at the upper end of the chuck. In this case, the pendulum will hang at the bottom of the sample. Attach the auxiliary weight so that the memory is between 3 and 6. Press the switch and read the scale at the moment the pendulum's rotating rod leaves the sample. Measure the LEFT and RIGHT of the device.
- the calculation method is to calculate the average values of LEFT and RIGHT in the vertical and horizontal directions, respectively. In this embodiment, calculation was performed using the following formula. In addition. The positions of the weights are i at the 1st inch, ii at the 2nd inch, and iii at the 4th inch.
- a low basis weight part (including slits) is formed in the absorbent core 31, and another material (resin film) is arranged in an area overlapping with the low basis weight part, or the low basis weight part
- another material resin film
- a high-rigidity part is formed by embossing or the like on a material in an area that overlaps with the part.
- the low basis weight part and a different material, or the low basis weight part and the high rigidity part constitute a low liquid permeation part 100. Therefore, the low liquid permeability section 100 of the second embodiment of the absorbent article only needs to be provided at least partially on the absorbent core 31, and may have a portion that is not provided on the absorbent core 31.
- FIG. 5 shows an absorbent article according to a modified example.
- the absorbent article according to the modified example may be a modified example that is applicable to both the first form and the second form.
- the stiffness of the region where the low liquid permeable section 100 is provided may be higher than the rigidity of the region surrounding the low liquid permeable section 100. .
- the softness of the top sheet 10 makes it difficult for the wearer to feel the increased rigidity, thereby suppressing discomfort while wearing the top sheet.
- the low liquid permeable portion 100 may be arranged in the central region RC, similarly to the absorbent article of the first form.
- the low liquid permeation section 100 may straddle the center 1CW of the absorbent core 31 in the width direction W.
- the center of the absorbent core 31 in the width direction W is a part where force tends to concentrate, such as when the absorbent core 31 is pinched between legs.
- the center of the absorbent core 31 in the width direction W is a region from which bodily fluids are likely to be drained.
- the low liquid permeation portion 100 may be provided without straddling the center 1CW of the absorbent core 31 in the width direction W.
- Body fluid can be absorbed at the center in the width direction W of the absorbent article 1 where a relatively large amount of body fluid is discharged, and discomfort caused by a decrease in fluid drawing ability can be suppressed.
- the low liquid permeation section 100 may extend in the front-rear direction L. That is, the low liquid permeation section 100 may be vertically long.
- the low liquid permeability portion 100 can diffuse body fluid in the front-back direction L, and absorb the body fluid in a wide area in the front-back direction L. By widening the absorption range of body fluid, it is possible to suppress the formation of a region that retains a large amount of body fluid locally, and it becomes easier to maintain the rigidity of the absorbent core 31 even after absorption of body fluid.
- a plurality of low liquid permeable portions 100 of the absorbent article 1A may be provided extending in the front-rear direction L and spaced apart in the width direction W.
- the low liquid permeable parts 100 are arranged at intervals in the width direction W, and there are regions between the low liquid permeable parts 100 where no low liquid permeable parts 100 are arranged. Even if the low liquid permeation portion 100 located on the outside in the width direction W is deformed when receiving a force directed inward in the width direction W by a leg or the like, the low liquid permeation portion 100 located on the inside in the width direction W is deformed.
- the parts 100 can exhibit their performance without being deformed, and the performance of the low liquid permeable part 100 can be maintained by any one of the low liquid permeable parts 100.
- the low liquid permeable part 100 diffuses the body fluid in the front-rear direction L, and the body fluid can be absorbed in a wide area in the front-rear direction L.
- the low liquid permeable portion 100 of the absorbent article 1B may be continuously provided over the entire area of the absorbent core 31 in the front-rear direction L. According to this configuration, a region where the state of the absorbent core 31 before use can be maintained can be continuously provided over the entire area of the absorbent core 31 in the front-rear direction L.
- the low liquid permeation section 100 of the present embodiment is not provided over the entire area of the absorbent core 31, but is provided within a certain range from the center 1CL of the absorbent article 1 in the front-rear direction L.
- the front edge 100F of the low liquid permeation part 100 is located on the rear side of the front edge 31F of the absorbent core 31, and the rear edge 100R of the low liquid permeation part 100 is located behind the absorbent core 31. It is located on the front side of the edge 31R. According to this configuration, body fluid can be drawn in and absorbed in a region outside the low liquid permeable portion 100 in the front-rear direction L.
- the low liquid permeation part 100 can be The body fluid can be diffused to the outside and retained in a wide range of the absorbent core 31. Therefore, the absorbent core 31 does not absorb body fluid locally, but can absorb the body fluid over the entire absorbent core 31, and can suppress deformation and twisting of the entire absorbent core 31 after absorbing the body fluid. Furthermore, the low liquid permeability section 100 may be arranged across the plurality of adhesive sections 60.
- a region where the low liquid permeable part 100 and the adhesive part 60 overlap in the thickness direction T, a region where the adhesive part 60 is not arranged and the low liquid permeable part 100 is arranged, and a region where the adhesive part 60 is arranged and the low liquid permeable part 100 may be provided.
- the adhesive portion 60 may be placed across the outer edge of the low liquid permeable portion 100. If the low liquid permeable portion 100 has a high rigidity, there is a risk that the outer edge (boundary) of the low liquid permeable portion 100 may come into contact with the skin, causing a sense of discomfort. However, since the adhesive part is arranged across the outer edge (boundary) of the low liquid permeable part 100, the outer edge of the low liquid permeable part 100 is fixed to the wearable article by the adhesive part, and the wearable article becomes low. By being in close contact with the outer edge of the liquid permeable portion 100, discomfort on the skin can be suppressed.
- the adhesive portion 60 may straddle the outer edge of the low liquid permeable portion 100 in the width direction, and may straddle the outer edge of the low liquid permeable portion 100 in the front-rear direction. A feeling of discomfort can be suppressed at the entire outer edge of the low liquid permeation section 100. Note that the structure of straddling the outer edge of the low liquid permeation section 100 does not need to straddle the entire outer edge, but only needs to straddle at least part of it.
- the low liquid permeable portion 100 of the absorbent article 1C may extend along the width direction W. That is, the low liquid permeation section 100 may be horizontally long. According to this configuration, body fluid can be diffused in the width direction W by the low liquid permeation portion 100, and the body fluid can be absorbed in a wide area in the width direction W. By widening the absorption range of body fluid, it is possible to suppress the formation of a region that retains a large amount of body fluid locally, and it is easy to maintain the rigidity of the absorbent core 31 after absorption of body fluid. As shown in FIG.
- the low liquid permeable portion 100 of the absorbent article 1C extends in the width direction W and is continuously provided over the entire width direction W of the absorbent core 31. Good too. According to this configuration, a region in which the state of the absorbent core 31 before use can be maintained can be continuously provided over the entire width direction W of the absorbent core 31. As shown in FIG. 5(D), in the modified example, the low liquid permeable portion 100 of the absorbent article 1D may extend in the width direction W and be disposed in a part of the width direction W of the absorbent core 31. good.
- the low liquid permeable part 100 By providing the low liquid permeable part 100 in a region where a relatively large amount of body fluid is discharged, and not providing the low liquid permeable part 100 on the outside in the width direction W, the low liquid permeable part 100 is provided outside in the width direction W through the low liquid permeable part 100.
- the body fluid can be diffused and retained in a wide range of the absorbent core 31.
- a plurality of low liquid permeable portions 100 of the absorbent article 1D may extend in the width direction W and be provided at intervals in the front-rear direction L.
- the low liquid permeable parts 100 are arranged at intervals in the front-rear direction L, and there are regions between the low liquid permeable parts 100 in which no low liquid permeable parts 100 are arranged.
- the low liquid permeable part 100 diffuses the body fluid in the width direction W, and the body fluid can be absorbed in a wide area in the width direction W.
- the low liquid permeable part 100 has a high rigidity, deformation of the low liquid permeable part 100 when pinched between legs can be suppressed, and the shape of the absorbent core 31 can be maintained in the state before use.
- the pitch of the low liquid permeable portion 100 in the front-rear direction L may be different from the pitch of the adhesive portion 60 in the front-rear direction L.
- a region where the low liquid permeable part 100 and the adhesive part 60 overlap in the thickness direction T, a region where the adhesive part 60 is not arranged and the low liquid permeable part 100 is arranged, and a region where the adhesive part 60 is arranged and the low liquid permeable part 100 may be provided.
- the low liquid permeable portions 100 of the absorbent article 1E may be arranged in a grid pattern.
- the region where the low liquid permeable portion 100 is provided and the region where the low liquid permeable portion 100 is not provided extend in the front-rear direction L and the width direction W, respectively.
- the body fluid can be diffused over a wide range in the direction W, and the ability to draw in the body fluid can be ensured in the region where the low liquid permeability section 100 is not provided.
- the low liquid permeability section 100 may be provided in the excretion port facing area S5, which is arranged to face the wearer's excretion port.
- the absorbent article 1 is excreted at the center in the front-rear direction L.
- a mouth facing area S5 is arranged. That is, the low liquid permeation section 100 may straddle the center 1CL of the absorbent article 1 in the front-back direction L.
- the excretory opening facing area S5 is a part where body fluids are most easily guided and are easily absorbed.
- the rigidity in the area where body fluids are most easily absorbed and deformed can be maintained in a state close to that before use, and twisting when worn can be effectively suppressed. can.
- the low liquid permeable portion 100 of the absorbent article 1F may be arranged so as not to straddle the center in the front-rear direction L. According to this configuration, body fluid can be absorbed at the center 1CL in the front-rear direction L of the absorbent article 1 where a relatively large amount of body fluid is discharged, and it is possible to suppress the discomfort caused by the decrease in the ability to draw in the fluid. Further, as shown in FIG. 5(F), if the low liquid permeability section 100 of the absorbent article 1F is located in front of the center of the absorbent core 31 in the front-rear direction, the user can perform the wearing operation. The presence of the low liquid permeable portion 100 becomes easier to notice when worn.
- the length of the low liquid permeable portion 100 in the front-rear direction L may be 50% or less of the length of the absorbent article 1 in the front-rear direction L.
- the low liquid permeation portion 100 is 50% or less of the length of the absorbent article 1 in the front-rear direction L, and occupies a low proportion of the entire length of the absorbent core 31 in the front-rear direction.
- the cross-sectional shape of the absorbent article 1 along the front-back direction L becomes a curved shape that follows the shape of the body.
- the length of the low liquid permeable part 100 in the front-rear direction L may be 40% or less of the length of the absorbent article 1 in the front-rear direction L, more preferably 30% or less. It's fine.
- the length of the low liquid permeable portion 100 in the front-rear direction L may be 90 mm or less, preferably 80 mm or less, in order to facilitate placement along the curve of the body. Further, in order to suppress front leakage and rear leakage of body fluids, the distance between the outer edge of the low liquid permeability section 100 and the outer edge of the absorbent core 31 may be 20 mm or more, preferably 30 mm or more. The length may be more preferably 40 mm or more. Further, in order to ensure the ability of the low liquid permeable part 100 to maintain the shape of the absorbent core 31, the length of the low liquid permeable part 100 in the front-rear direction L may be 30 mm or more, preferably 40 mm or more. The length may be more preferably 50 mm or more.
- the length of the low liquid permeable portion 100 in the width direction W may be 50% or less of the length of the absorbent core 31 in the width direction W. Since the length of the low liquid permeable portion 100 in the width direction W is 50% or less of the entire area of the absorbent core 31 in the width direction W, the low liquid permeable portion 100 is difficult to touch the wearer's feet, etc., and is not subjected to direct force. Since this can be avoided, the low liquid permeation portion 100 can be maintained and the twisting of the absorbent core 31 can be reduced.
- the length of the low liquid permeable portion 100 in the width direction W is too long, the ratio of the low liquid permeable portion 100 will increase, the ability to draw body fluid into the absorbent core 31 will decrease, and leakage such as transmission leakage will occur. There is a possibility that this may occur.
- the length of the low liquid permeable portion 100 in the width direction W is 50% or less of the entire area of the absorbent core 31 in the width direction W, the ability to draw body fluids in other regions can be ensured and leakage can be suppressed.
- the length in the width direction W of the low liquid permeation section 100 may be 40% or less of the length in the width direction W of the absorbent core 31, and more preferably, the length in the width direction W of the absorbent core 31. It may be 30% or less of the length of W.
- the length of the low liquid permeable portion 100 in the width direction W may be 40 mm or less, preferably 30 mm or less, and more preferably 20 mm or less, in order to suppress discomfort with the excretion port.
- the length in the width direction W of the low liquid permeable portion 100 may be 60 mm or less, preferably 40 mm or less, and more preferably 30 mm or less, in order to suppress discomfort on the legs. It's fine.
- the distance between the outer edge of the low liquid permeability section 100 and the outer edge of the absorbent article may be 20 mm or more, preferably 30 mm or more, and more preferably 30 mm or more.
- the length may be 40 mm or more.
- the distance between the outer edge of the low liquid permeability section 100 and the outer edge of the absorbent core 31 may be 20 mm or more, preferably 30 mm or more, More preferably, it may be 40 mm or more.
- the length of the low liquid permeable part 100 in the width direction W may be 5 mm or more, preferably 10 mm or more. The length may be more preferably 15 mm or more.
- the low liquid permeability section 100 may be made of at least one material placed on the target member.
- the low liquid permeability portion 100 may be provided on one material, or may be provided on multiple materials.
- the low liquid permeable portion 100 may be provided between the non-skin surface of the top sheet 10 and the non-skin surface of the absorbent core 31, and its position in the thickness direction T within this range is not limited.
- the low liquid permeability portion 100 may be provided continuously in the thickness direction T between the non-skin surface of the top sheet 10 and the non-skin surface of the absorbent core 31, or may be provided in a part of the thickness direction T. You can.
- the low liquid permeation section 100 may be provided between the top sheet 10 and the absorbent core 31. According to this configuration, absorption of body fluid by the absorbent core 31 at least in the area overlapping with the low liquid permeable portion 100 can be suppressed, and since the low liquid permeable portion 100 and the absorbent core 31 are provided separately, the absorbent core 31 Easy to ensure absorption performance.
- the low liquid permeation portion 100 provided between the top sheet 10 and the absorbent core 31 can be made of, for example, a second sheet, a core wrap sheet, the resin film of this embodiment, an adhesive, and a water repellent. .
- a nonwoven fabric having hydrophilic fibers coated with a water repellent, or a part of a nonwoven fabric having hydrophilic fibers formed into a film by welding or the like may be used as the low liquid permeation section 100.
- the low liquid permeable portion 100 of the absorbent article 1G may be provided in the absorbent core 31.
- the absorbent core 31 when part of the absorbent core 31 is the low liquid permeable portion 100, it becomes difficult for the absorbent core 31 to absorb bodily fluids, so that the rigidity of the absorbent core 31 can be maintained. Further, the ability to draw body fluids is ensured in the top sheet 10 and the like disposed closer to the skin T1 than the low liquid permeable portion 100, and liquid residue on the surface of the absorbent article 1 can be suppressed. Therefore, skin troubles caused by body fluids remaining on the surface of the absorbent article 1 can be suppressed.
- the low liquid permeability portion 100 can be provided at a position away from the absorbent core 31, reducing the possibility that the absorbent core 31 absorbs body fluids, and reducing the rigidity of the absorbent core 31 before and after absorbing body fluids. Changes can be further reduced.
- the low liquid permeability section 100 may be constituted by a liquid-impermeable sheet disposed closer to the skin T1 than the absorbent core 31, as in the present embodiment.
- An example of the liquid-impermeable sheet is the resin film 50 of this embodiment, and another example is cellophane. According to this configuration, absorption of body fluid from the skin side is suppressed by the liquid-impermeable sheet, and the rigidity of the absorbent core 31 in the region overlapping with the sheet can be ensured.
- the low liquid permeation section 100 may be configured by a hydrophobic coating agent applied to at least one of the absorbent core 31, the top sheet 10, and a sheet disposed between the absorbent core 31 and the top sheet 10. .
- a hydrophobic coating agent applied to at least one of the absorbent core 31, the top sheet 10, and a sheet disposed between the absorbent core 31 and the top sheet 10.
- the hydrophobic coating agent include an adhesive (HMA type adhesive) and a water repellent (silicon).
- the low liquid permeation portion 100 is configured with a coating agent, in which the area where the coating agent is applied is thicker than the surrounding area (so as to impregnate the inside of the material), and the area ratio of the coating agent per unit area is higher than that of the surrounding area. (the surrounding area is coated intermittently, such as a spiral, and the area corresponding to the low liquid permeation area 100 is coated non-intermittently), and the low liquid permeation area 100 is configured without applying a coating agent around the area.
- An example is a configuration in which the coating is applied only to the area where the coating is applied.
- the low liquid permeation section 100 of the absorbent article 1G may be constituted by a compressed section 35 that compresses at least the absorbent core 31 in the thickness direction.
- the compressing section 35 may compress only the absorbent core 31, or may compress both the absorbent core 31 and other sheets (for example, core wrap sheet, second sheet, etc.).
- the low liquid permeation section 100 consisting of the compressed section 35 has high rigidity and can further ensure the rigidity of the absorbent core 31. More preferably, when forming the compressed portion 35, silicone may be applied to the location where the compressed portion 35 is to be provided, and the silicon may be transferred to the compressed portion.
- the transfer speed of body fluid in the low liquid permeation section 100 can be further reduced.
- the material (absorbent core 31 etc.) which forms the compression part 35 contains a thermoplastic resin, you may melt
- an inspection member 200 for testing the health condition of the wearer is disposed in a region overlapping with the low liquid permeable portion 100 on the non-skin side T2 of the low liquid permeable portion 100. good.
- a resin film 50 constituting the low liquid permeation section 100 is arranged on the skin side T1 of the inspection member 200.
- the low liquid permeation section 100 is configured to be difficult to twist, it is possible to avoid applying excessive pressure to the inspection member 200, and the generation of creases on the inspection member 200 can be avoided.
- the test member may be, for example, a member that displays (color indicating) the wearer's health condition using an indicator, and, for example, the test member described in Japanese Patent Application Laid-Open No. 2020-022585 can be applied.
- the low liquid permeable portion 100 only needs to cover at least a portion of the test member 200, and preferably, the low liquid permeable portion 100 may cover the entire test member 200.
- an absorbent article that can easily maintain the absorbent performance of the absorbent core while suppressing liquid residue on the top sheet.
- Absorbent article 10 Top sheet 20 : Back sheet 31 : Absorbent core 35 : Compressed part 50 : Resin film (liquid-impermeable sheet) 60 : Adhesive part 100 : Low liquid permeation part 200 : Inspection member L : Anteroposterior direction RC : Central region S5 : Excretory opening facing region T : Thickness direction T1 : Skin side T2: Non-skin side W: Width direction
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Abstract
Description
トップシート上に排出された体液のうち、開孔を介して非肌側に導かれた体液は、トップシート上に残らず、トップシートの液残りを抑制できる。しかし、撥水剤が付された領域上の体液は、トップシート内に引き込まれ難く、トップシート上に体液が液のこりし易い。よって、トップシートに残った体液による肌トラブルのおそれがある。
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。
態様1に係る発明は、液透過性のトップシート、液不透過性のバックシート、及び前記トップシートと前記バックシートの間に配置された吸収コアを有する吸収性物品である。前記トップシートの非肌面よりも非肌側かつ前記吸収コアの非肌面よりも肌側において、周囲よりも肌側から非肌側への体液の移行速度が低い低液透過部が設けられている。前記低液透過部は、前記吸収コアを前記幅方向に三等分した領域のうち、前記幅方向の中央に位置する中央領域に配置されている。低液透過部は、周囲より非肌側に体液の移行速度が低く、周囲と比較して体液を移行させ難い。低液透過部は、吸収コアの非肌面よりも肌側に位置している。吸収コアのうち、当該低液透過部よりも非肌側に位置する吸収コアは、体液が導かれ難く、体液の吸収量が少なくなる。通常、吸収コアは、体液を吸収することで、その剛性や厚みが変化する。体液を吸収した後の吸収コアは、吸収前の吸収コアと比較して、剛性や厚みを維持できず、使用後まで、狙いの状態を維持できないことがある。しかし、低液透過部を設けることで、体液を吸収した前と後で吸収コアの変化を抑制できる部分を、吸収コアに設けることができる。吸収コアの中央領域は、体液が排出され易く、体液の吸収による変化が大きい。当該中央領域に低液透過部を設けることで、使用前の状態を使用後でも維持し易くなる。また、低液透過部よりも肌側に配置されたトップシート等において体液の引き込み性を確保し、吸収性物品の表面の液残りを抑制できる。よって、吸収性物品の表面に残った体液による肌トラブルを抑制できる。
以下、図面を参照して、実施形態に係る吸収性物品1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。吸収性物品1は、生理用ナプキン、パンティライナー、失禁パッド、糞便パッド、使い捨ておむつ、ショーツ型ナプキン等の吸収性物品であってよい。吸収性物品1は、下着のような着用物品に装着されて使用される物品であってもよいし、着用物品に装着されずに使用される吸収性物品であってもよい。実施形態の吸収性物品1は、パンティライナーである。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場合があ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る場合がある。また、断面図においては、説明の便宜上、各構成部材を離間して示しているが、実際の製品においては、各構成部材は当接している。
10 :トップシート
20 :バックシート
31 :吸収コア
35 :圧搾部
50 :樹脂フィルム(液不透過性のシート)
60 :粘着部
100 :低液透過部
200 :検査部材
L :前後方向
RC :中央領域
S5 :排泄口対向域
T :厚み方向
T1 :肌側
T2 :非肌側
W :幅方向
Claims (17)
- 液透過性のトップシート、液不透過性のバックシート、及び前記トップシートと前記バックシートの間に配置された吸収コアを有する吸収性物品であって、
前記トップシートの非肌面よりも非肌側かつ前記吸収コアの非肌面よりも肌側において、周囲よりも肌側から非肌側への体液の移行速度が低い低液透過部が設けられており、
前記低液透過部は、前記吸収コアを幅方向に三等分した領域のうち、前記幅方向の中央に位置する中央領域に配置されている、吸収性物品。 - 前記低液透過部が設けられた領域の剛性は、前記低液透過部の周囲の領域の剛性よりも高い、請求項1に記載の吸収性物品。
- 液透過性のトップシート、液不透過性のバックシート、及び前記トップシートと前記バックシートの間に配置された吸収コアを有する吸収性物品であって、
前記トップシートの非肌面よりも非肌側かつ前記吸収コアの非肌面よりも肌側において、周囲よりも肌側から非肌側への体液の移行速度が低い低液透過部が設けられており、
前記低液透過部は、吸収コアに設けられており、
前記低液透過部が設けられた吸収コアの単位面積あたりの吸収量は、前記低液透過部の周囲の吸収コアの単位面積あたりの吸収量よりも低く、
前記低液透過部が設けられた領域の剛性は、前記低液透過部の周囲の領域の剛性よりも高い、吸収性物品。 - 前記低液透過部は、前記吸収コアよりも肌側に配置された液不透過性のシートによって構成されている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、前記吸収コア、前記トップシート、及び前記吸収コアと前記トップシートの間に配置されたシートの少なくともいずれかに付された疎水性の塗布剤によって構成されている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、少なくとも前記吸収コアを厚み方向に圧縮した圧搾部によって構成されている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、前記トップシートと前記吸収コアの間に設けられている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、前記吸収コアに設けられている、請求項1又は請求項2に記載の吸収性物品。
- 前記トップシートと前記吸収コアの間に配置されたセカンドシートを有し、
前記低液透過部は、前記トップシートと前記セカンドシートの間に設けられている、請求項1から請求項3のいずれか1項に記載の吸収性物品。 - 前記低液透過部は、前記吸収コアの幅方向の中心を跨いでいる、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、前後方向に延びている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、幅方向に間隔を空けて複数設けられている、請求項11に記載の吸収性物品。
- 前記低液透過部は、幅方向に延び、かつ前後方向に間隔を空けて複数配置されている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部の前記幅方向の長さは、前記吸収コアの幅方向の長さに対する50%以下である、請求項13に記載の吸収性物品。
- 前記低液透過部は、着用者の排泄口と対向して配置される排泄口対向域に設けられている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部は、前後方向の中心を跨がないように設けられている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
- 前記低液透過部よりも非肌側において前記低液透過部と重なる領域には、着用者の健康状態を検査するための検査部材が配置されている、請求項1から請求項3のいずれか1項に記載の吸収性物品。
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