WO2014196670A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2014196670A1
WO2014196670A1 PCT/JP2014/073686 JP2014073686W WO2014196670A1 WO 2014196670 A1 WO2014196670 A1 WO 2014196670A1 JP 2014073686 W JP2014073686 W JP 2014073686W WO 2014196670 A1 WO2014196670 A1 WO 2014196670A1
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WO
WIPO (PCT)
Prior art keywords
fiber density
low
top sheet
sheet
acid
Prior art date
Application number
PCT/JP2014/073686
Other languages
English (en)
Japanese (ja)
Inventor
央 橋野
あゆみ 盛岡
明乃 大槻
文彦 谷野
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to CN201480027336.5A priority Critical patent/CN105307611B/zh
Publication of WO2014196670A1 publication Critical patent/WO2014196670A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A61F13/51108—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections the top sheet having corrugations or embossments having one axis relatively longer than the other axis, e.g. forming channels or grooves in a longitudinal direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different 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
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A61F13/51305—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability having areas of different 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
    • 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
    • A61F13/534—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
    • A61F13/53713—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 vertical direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • A61F2013/51355—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability for improving fluid flow

Definitions

  • the present invention relates to an absorbent article.
  • Patent Documents 1 and 2 formation of a ridge and a groove on the top sheet.
  • the fiber density in the central region of the buttock is set to a substantially uniform fiber density lower than the average fiber density of the entire buttock, and the fiber density in the side edge region of the buttock is set to A substantially uniform fiber density that is higher than the overall average fiber density is used.
  • region of a buttocks to an absorber improves.
  • the contact area between the user's skin and the top sheet is reduced by the buttocks and the grooves, even if the menstrual blood once absorbed by the absorbent body returns to the top sheet, the reverted menstrual blood remains in the user's skin. It is hard to adhere to. Furthermore, even if force is applied to the buttocks, the center region is supported by the side edge region of the buttocks, so that the buttocks are not easily crushed.
  • Patent Document 3 formation of a compressed recess in the absorber.
  • the compression recessed part which consists of the high pressing recessed part which is scattered and the low pressing recessed part which connects the scattered high pressing recessed part is formed in an absorber.
  • the rigidity of an absorber improves and generation
  • a blood slipperiness imparting agent having a kinematic viscosity at 40 ° C. of 0.01 to 80 mm 2 / s, a water retention of 0.01 to 4.0% by mass and a weight average molecular weight of less than 1,000.
  • Patent Document 4 the menstrual blood transfer property from a top sheet to an absorber is improved with a blood slipperiness
  • An object of the present invention is to provide an absorbent article having improved liquid migration from a top sheet to an absorber.
  • the present invention has a transverse direction, a longitudinal direction and a thickness direction orthogonal to each other, a liquid-permeable top sheet, a liquid-impermeable back sheet, the top sheet,
  • An absorbent article comprising an absorbent body provided between back sheets, wherein the top sheet is a nonwoven fabric having a high fiber density region and a low fiber density region, and the absorbent body comprises absorbent fibers.
  • An absorptive core containing, a topsheet side covering sheet for covering the topsheet side surface of the absorbent core, a backsheet side covering sheet for covering the backsheet side surface of the absorbent core, and the backsheet side covering
  • a pressing recess formed by pressing the sheet toward the absorbent core, and the pressing recess is a low-pressure pressing formed in a mesh pattern And high pressing depressions formed so as to be scattered in the mesh pattern, and project the low fiber density region and the low pressing depression on a virtual plane perpendicular to the thickness direction. Then, the absorbent article is provided in which a projection region of the low fiber density region has an overlap with a projection region of the low-pressure depression.
  • an absorbent article having improved liquid migration from the top sheet to the absorber is provided.
  • FIG. 1 is a partially broken plan view of a sanitary napkin according to an embodiment of the absorbent article of the present invention.
  • FIG. 2 is an enlarged sectional view taken along line AA in FIG.
  • FIG. 3 is an enlarged sectional view taken along line BB in FIG.
  • FIG. 4 is an enlarged perspective view of a part of the top sheet included in the sanitary napkin shown in FIG. 1.
  • FIG. 5 is a plan view of the back sheet side surface of the absorbent body included in the sanitary napkin shown in FIG. 1.
  • FIG. 6 is an enlarged view of a portion indicated by C in FIG. FIG.
  • FIG. 7 is a projection area of a groove portion generated when the groove portion of the top sheet and the low-pressure depression of the absorbent body are projected on a virtual plane perpendicular to the thickness direction of the sanitary napkin in the sanitary napkin shown in FIG. It is a one part enlarged view of a virtual plane which shows the overlap with the projection area
  • the absorbent article of the present invention has a transverse direction, a longitudinal direction, and a thickness direction orthogonal to each other, and a liquid-permeable top sheet, a liquid-impermeable back sheet, and between the top sheet and the back sheet
  • the top sheet is a non-woven fabric having a high fiber density region and a low fiber density region, and the absorber contains an absorptive fiber.
  • a pressing recess formed by pressing in the direction of the sex core, and the pressing recess is a low pressing recess formed in a mesh pattern and the mesh High depressions formed so as to be scattered in the pattern, and when the low fiber density region and the low depressions are projected onto a virtual plane perpendicular to the thickness direction,
  • the projection area of a fiber density area is related with the absorptive article which has an overlap with the projection area of the low-pressure pressing crevice.
  • high fiber density and low fiber density mean the relative level of fiber density
  • high pressure and low pressure mean the relative level of compression. means.
  • the absorbent article of the present invention can exhibit the following effects.
  • the top sheet is partitioned into a high fiber density region and a low fiber density region in plan view.
  • the liquid is less liable to stay in the low fiber density region than in the high fiber density region, so that the liquid supplied to the top sheet easily moves to the absorbent body through the low fiber density region of the top sheet.
  • the low fiber density region of the top sheet and the low pressing depression of the absorbent body overlap each other so that the projection region of the low fiber density region overlaps with the projection region of the low pressing depression (that is, in the thickness direction of the absorbent article).
  • the liquid supplied to the top sheet moves to the absorbent body through the low fiber density region of the top sheet, the liquid tends to migrate to the low pressure depression of the absorbent body.
  • the absorbent article of the present invention can exhibit improved liquid migration from the top sheet to the absorbent body.
  • a preferable aspect (Aspect 1) of the absorbent article of the present invention 2% or more of the projected area of the low fiber density area overlaps with the projected area of the low-pressure depression. According to the aspect 1, the liquid transferability from the low fiber density region of the top sheet to the low pressure recessed portion of the absorber can be improved.
  • the fiber density of the low-pressure depression is greater than the fiber density of the low fiber density region.
  • the liquid transfer property from the low fiber density region of the top sheet to the low pressure recessed portion of the absorbent body is obtained by utilizing the property of the liquid that it is easy to transfer from the low fiber density part to the high fiber density part. Can be improved. Note that aspect 2 can be combined with aspect 1.
  • the fiber density of the high-pressure recessed portion is larger than the fiber density of the high fiber density region.
  • the liquid remaining in the low fiber density region and the high fiber density region of the top sheet is used to absorb the liquid remaining in the absorber using the characteristic of the liquid that easily shifts from the low fiber density portion to the high fiber density portion. It can be pulled into the high pressure depression.
  • Aspect 3 can be combined with Aspect 1 and / or Aspect 2.
  • the top sheet has a flange extending in the longitudinal direction and a groove extending in the longitudinal direction, and the flange Corresponds to the high fiber density region, and the groove corresponds to the low fiber density region.
  • the liquid supplied to the top sheet is likely to spread in the longitudinal direction of the absorbent article along the ridges and the grooves, so that the liquid supplied to the top sheet is reduced in the short direction of the absorbent article. Spreading and leakage from the absorbent article due to this can be prevented.
  • the aspect 4 can be combined with one of the aspects 1 to 3 or two or more aspects that can be arranged side by side.
  • the low-pressure depression has an extending portion extending in the longitudinal direction, and the groove and the low-pressure depression are formed with the thickness.
  • the projection area of the groove When projected onto a virtual plane perpendicular to the direction, the projection area of the groove has an overlap with the projection area of the extending portion.
  • the extending direction of the groove portion (the liquid spreading direction in the top sheet) and the extending direction of the extending portion of the low-pressure squeezing concave portion (the liquid diffusion direction in the absorber) coincide with each other, and Since the extension part of a recessed part overlaps in the thickness direction of an absorbent article, the liquid transferability from the groove part of a top sheet to the extension part of a low pressing recessed part can be improved.
  • Aspect 7 of the absorbent article according to Aspect 5 or Aspect 6, the overlap between the projection area of the groove and the projection area of the extending portion extends over the entire short direction of the projection area of the groove. Arise. According to the aspect 7, the liquid transferability from the groove portion of the top sheet to the extended portion of the low-pressure squeezed concave portion can be improved. Aspect 7 can be combined with Aspect 5 and / or Aspect 6.
  • the collar portion has a central portion located in the center in the lateral direction, and the short side relative to the central portion. Both side portions located on both sides in the direction, the central portion has a fiber density lower than the average fiber density of the entire collar portion, and the both side portions have an average fiber density of the entire collar portion. Has higher fiber density.
  • the aspect 8 since the fiber density of the both side parts of the collar part is higher than the fiber density of the center part of the collar part, the retention of the liquid in the center part of the collar part can be suppressed. The supplied liquid can be efficiently guided to the groove portion of the top sheet.
  • the aspect 8 can be combined with one of the aspects 4 to 7 or two or more aspects that can be arranged side by side.
  • the absorbent body has a central portion located at the center in the longitudinal direction, and both side portions located on both sides in the longitudinal direction with respect to the central portion.
  • the pressing recess is formed in the both side portions, but is not formed in the central portion.
  • the aspect 9 can be combined with one of the aspects 1 to 8 or two or more aspects that can be arranged side by side.
  • the high-pressure depression is formed in an intersecting region of the mesh pattern.
  • the high-pressure recessed portion is provided in the intersecting region of the mesh pattern in which force is easily applied when the absorbent article is used, the separation between the absorbent core and the backsheet-side covering sheet can be prevented. As a result, the mesh pattern of the low-pressure depressions can be maintained.
  • the aspect 10 can be combined with one of the aspects 1 to 9 or two or more aspects that can be arranged side by side.
  • the topsheet-side covering sheet is bonded to the topsheet-side surface of the absorbent core with an adhesive
  • the backsheet-side covering sheet is The absorbent core is bonded to the back sheet side surface with an adhesive.
  • the separation between the absorbent core and the top sheet side covering sheet and the back sheet side covering sheet and the deterioration of the liquid transferability due to the separation can be prevented.
  • the aspect 11 can be combined with one of the aspects 1 to 10 or two or more aspects that can be arranged side by side.
  • the top sheet has a kinematic viscosity at 40 ° C. of 0.01 to 80 mm 2 / s, a water retention of 0.01 to 4.0% by mass, A blood slipperiness imparting agent having a weight average molecular weight of less than 1,000 is applied.
  • Aspect 12 is particularly useful when the liquid supplied to the top sheet is blood (for example, menstrual blood excreted from the wearer). That is, the blood supplied to the top sheet can slide down to the low fiber density region of the top sheet together with the blood slipperiness imparting agent applied to the top sheet, and can be transferred to the absorber. Therefore, according to the aspect 11, the blood remaining on the top sheet can be reduced, thereby preventing the stickiness of the top sheet and maintaining the smooth feeling.
  • the aspect 12 can be combined with one of the aspects 1 to 11 or two or more aspects that can be arranged side by side.
  • the IOB of the blood slipperiness imparting agent is preferably 0.00 to 0.60.
  • the blood slipperiness imparting agent is preferably the following (i) to (iii): (I) hydrocarbons, (Ii) from (ii-1) a hydrocarbon moiety and (ii-2) a carbonyl group (—CO—) and an oxy group (—O—) inserted between the CC single bonds of the hydrocarbon moiety.
  • the hydrocarbon moiety A compound having one or a plurality of the same or different groups selected from the group consisting of a carboxyl group (—COOH) and a hydroxyl group (—OH), which replaces a hydrogen atom; Selected from the group consisting of any combination thereof (in the compound (ii) or (iii), when two or more oxy groups are inserted, each oxy group is not adjacent) ).
  • the blood slipperiness imparting agent is preferably the following (i ′) to (iii ′): (I ′) hydrocarbon, (Ii ′) (ii′-1) a hydrocarbon moiety and (ii′-2) a carbonyl bond (—CO—), an ester bond (—COO) inserted between the C—C single bonds of the hydrocarbon moiety.
  • the blood slipperiness imparting agent is preferably the following (A) to (F): (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups substituting hydrogen atoms in the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and the chain An ester with a compound having one carboxyl group for substituting a hydrogen atom in the hydrocarbon moiety, (B) (B1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups substituting for hydrogen atoms in the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and the chain An ether with a compound having one hydroxyl group replacing a hydrogen atom of the hydrocarbon moiety, (C) (C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid containing a chain hydrocarbon moiety and 2 to 4 carboxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety; C2) an ester of a chain
  • the blood slipperiness imparting agent is preferably (a 1 ) an ester of a chain hydrocarbon tetraol and at least one fatty acid, or (a 2 ) a chain hydrocarbon triol and at least one fatty acid.
  • the type and application of the absorbent article of the present invention are not particularly limited.
  • the absorbent article include sanitary products and sanitary products such as sanitary napkins, disposable diapers, panty liners, incontinence pads, sweat removing sheets, etc., and these may be used for humans and other than humans such as pets. Animals may be targeted.
  • the liquid which the absorbent article is to be absorbed is not particularly limited, and examples thereof include liquid excretion excreted from the wearer (for example, menstrual blood, urine, descending product, etc.).
  • a sanitary napkin 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, a top sheet 2 and a back sheet 3. And an absorber 4 provided between the two.
  • the sanitary napkin 1 has a transverse direction X, a longitudinal direction Y, and a thickness direction Z that are orthogonal to each other.
  • the top sheet 2, the absorber 4 and the back sheet 3 are sequentially laminated in the thickness direction Z, and the thickness direction Z coincides with the lamination direction of the top sheet 2, the absorber 4 and the back sheet 3.
  • width means the dimension in the short direction X
  • length means the dimension in the longitudinal direction Y
  • Thickness means the dimension in the thickness direction Z. means.
  • the sanitary napkin 1 has a skin-side surface located on the wearer's skin side and a clothing-side surface located on the wearer's clothing (underwear) side when worn.
  • the skin side surface of the sanitary napkin 1 is constituted by one surface (the upper surface in FIGS. 2 and 3) of the top sheet 2, and the clothing side surface of the sanitary napkin 1 is one surface of the back sheet 3 ( 2 and 3, the lower surface).
  • the sanitary napkin 1 is worn for the purpose of absorbing liquid excretion (particularly menstrual blood) excreted from the wearer.
  • the top sheet 2 is worn on the skin side of the wearer, and the back sheet 3 is worn on the clothes (underwear) side of the wearer.
  • the liquid excretion excreted from the wearer passes through the top sheet 2 to reach the absorber 4 and is absorbed and held by the absorber 4. Leakage of liquid excretion absorbed and held by the absorber 4 is prevented by the back sheet 3.
  • the top sheet 2 and the back sheet 3 are joined at their longitudinal ends by seal portions 11 a and 11 b to form a main body portion 6, and end portions in the width direction are sealed portions 12 a. , 12b and substantially rectangular wings 7a, 7b extending in the width direction from the main body 6 are formed.
  • the shape of the main body 6 can be appropriately changed within a range suitable for a female body, underwear, and the like, and may be, for example, a substantially rectangular shape, a substantially oval shape, a substantially saddle shape, or the like.
  • the length of the main body 6 is usually 100 to 500 mm, preferably 150 to 350 mm, and the width of the main body 6 is usually 30 to 200 mm, preferably 40 to 180 mm.
  • Examples of the bonding mode by the seal portions 11a, 11b, 12a, and 12b include bonding by heat embossing, bonding by ultrasonic embossing, and bonding by a hot melt adhesive. In order to increase the bonding strength, two or more bonding modes may be combined (for example, a combination of bonding with a hot-melt adhesive and embossing performed thereafter).
  • adhesive portions 13 a and 13 b are provided on the clothing side of the backsheet 3 that forms the wing portions 7 a and 7 b, and on the clothing side of the backsheet 3 that forms the main body portion 6, An adhesive portion 13c is provided.
  • the sanitary napkin 1 is obtained by attaching the adhesive part 13c to the crotch part of the underwear, bending the wing parts 7a and 7b to the outer surface side of the underwear, and attaching the adhesive parts 13a and 13b to the crotch part of the underwear. Stablely fixed to underwear.
  • Examples of the adhesive contained in the adhesive portions 13a, 13b, and 13c include styrene-ethylene-butylene-styrene block copolymers, styrene-butylene polymers, styrene-butylene-styrene block copolymers, and styrene-isobutylene- Styrene polymers such as styrene copolymers; tackifiers such as C5 petroleum resins, C9 petroleum resins, dicyclopentadiene petroleum resins, rosin petroleum resins, polyterpene resins, terpene phenol resins; trifresyl phosphate, phthalic acid Examples include monomer plasticizers such as dibutyl and dioctyl phthalate; polymer plasticizers such as vinyl polymer and polyester.
  • the top sheet 2 is a non-woven fabric through which liquid excretion excreted from the wearer can permeate.
  • the kind of nonwoven fabric used as the top sheet 2, thickness, basic weight, etc. are not specifically limited as long as the liquid excretion excreted from the wearer can permeate.
  • the fibers constituting the nonwoven fabric include natural fibers (for example, wool, cotton, etc.), regenerated fibers (for example, rayon, acetate, etc.), inorganic fibers (for example, glass fibers, carbon fibers, etc.), thermoplastic resin fibers (for example, polyolefins such as polyethylene, polypropylene, polybutylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ionomer resin; polyethylene terephthalate, polybutylene terephthalate, polytrimethylene And polyesters such as terephthalate and polylactic acid; polyamides such as nylon).
  • natural fibers for example, wool, cotton, etc.
  • regenerated fibers for example, rayon, acetate, etc.
  • inorganic fibers for example, glass fibers, carbon fibers, etc.
  • thermoplastic resin fibers for example, polyolefins such as poly
  • the fibers constituting the nonwoven fabric are: core-sheath fibers, side-by-side fibers, island / sea fibers, etc .; hollow fibers; flat fibers, Y-shaped fibers, C-shaped fibers, etc .; latent crimps Alternatively, it may be a three-dimensional crimped fiber of actual crimp; a split fiber that is split by a physical load such as water flow, heat, embossing, or the like.
  • Nonwoven fabric production methods include, for example, a method of forming a web (fleece) and physically and chemically bonding fibers.
  • web formation methods include a spunbond method and a dry method (car Bonding methods, melt blown methods, airlaid methods, etc.), wet methods, and the like.
  • bonding method include a thermal bond method, a chemical bond method, a needle punch method, a stitch bond method, and a spunlace method.
  • the nonwoven fabric used as the top sheet 2 examples include an air-through nonwoven fabric, a spunbond nonwoven fabric, a point bond nonwoven fabric, a spunlace nonwoven fabric, a needle punched nonwoven fabric, a melt blown nonwoven fabric, and combinations thereof (for example, a spunbond / meltblown / spunbond ( SMS) non-woven fabric etc.), etc., among which air-through non-woven fabric is preferred. Since the air-through nonwoven fabric has a relatively low fiber density, the use of the air-through nonwoven fabric as the top sheet 2 can reduce liquid excrement remaining on the top sheet 2.
  • the air-through nonwoven fabric can be produced, for example, by spraying hot air on a web containing thermoplastic resin fibers to thermally bond the thermoplastic resin fibers.
  • the top sheet 2 has a surface region 20 that receives supply of liquid excretion excreted from the wearer.
  • the surface region 20 is located substantially at the center of the absorber arrangement region, and the inner compressed groove 5a is intermittently formed at the periphery of the surface region 20.
  • region is an area
  • the position and size of the surface area 20 can be appropriately adjusted in consideration of the position and size of the excretory opening contact area where the wearer's excretion opening (eg, small labia, large labia, etc.) abuts.
  • the surface area 20 is preferably set as an area larger than the excretion opening contact area including the excretion opening contact area and the surrounding area from the viewpoint of preventing leakage of liquid excretion to the outside.
  • the length of the surface region 20 is usually 50 to 200 mm, preferably 70 to 150 mm, and the width of the surface region 20 is usually 10 to 80 mm, preferably 20 to 50 mm.
  • the nonwoven fabric used as the top sheet 2 may contain an inorganic filler such as titanium oxide, barium sulfate, or calcium carbonate.
  • an inorganic filler may be contained only in the core of the core-sheath-type conjugate fiber, or an inorganic filler may be contained only in the sheath of the core-sheath-type conjugate fiber.
  • the top sheet 2 is a non-woven fabric having a plurality of ridges 21 extending in the longitudinal direction Y and a plurality of grooves 22 extending in the longitudinal direction Y.
  • the top sheet 2 is partitioned into a high fiber density region and a low fiber density region in plan view (see FIG. 1), and the flange portion 21 corresponds to a high fiber density region having a fiber density higher than that of the groove portion 22.
  • the liquid excrement supplied to the top sheet 2 tends to spread in the longitudinal direction Y along the collar part 21 and the groove part 22, the liquid excrement supplied to the top sheet 2 spreads in the short direction X and Leakage from the sanitary napkin 1 can be prevented.
  • the ratio of the total area of the projection area of the groove 22 to the total area of the projection area of the flange 21 is usually 1: 1 to 1:20, preferably 1: 1 to 1:10, more preferably 1: 1 to 1: 8. It is.
  • “High fiber density” and “low fiber density” mean relative high and low fiber density. Since the liquid tends to shift from a portion having a low fiber density to a portion having a high fiber density, the high or low fiber density is a liquid that is colored with respect to the nonwoven fabric used as the top sheet 2 (for example, a liquid containing a pigment). It can be evaluated by the shade of the color after dropping. That is, the dark part can be evaluated as a part with a large liquid migration amount, that is, a part with a relatively high fiber density, and the light color part has a small liquid migration amount, that is, a fiber density. It can be evaluated as a relatively small portion.
  • the plurality of eaves portions 21 extending in the longitudinal direction Y are arranged in the short direction X at substantially equal intervals.
  • the plurality of flange portions 21 extending in the longitudinal direction Y are also arranged in the short direction X at substantially equal intervals.
  • the flange portions 21 and the groove portions 22 are alternately disposed in the lateral direction X, and one groove portion 22 is disposed between the two flange portions 21.
  • Such an arrangement pattern of the flange portion 21 (high fiber density region) and the groove portion 22 (low fiber density region) is an example of an arrangement pattern of the high fiber density region and the low fiber density region.
  • the arrangement pattern of the density region is not limited to this embodiment.
  • the high fiber density region and the low fiber density region may extend in the lateral direction X and be aligned in the longitudinal direction Y.
  • the high fiber density region and the low fiber density region may extend intermittently in the longitudinal direction Y.
  • the high fiber density region and the low fiber density region may extend in the longitudinal direction Y while changing the extending direction (for example, wavy lines).
  • two or more low fiber density regions extending in the longitudinal direction Y may be arranged between two high fiber density regions extending in the longitudinal direction Y.
  • a plurality of high fiber density regions or low fiber density regions extending in the longitudinal direction Y may be arranged in the short direction X at different intervals.
  • one of the high fiber density region and the low fiber density region may be scattered and surrounded by the other.
  • two or more types of changes that can be juxtaposed may be combined.
  • the surface of the flange 21 is a curved surface, and the cross-sectional shape of the flange 21 is a substantially inverted U shape toward the surface.
  • a shape of the collar portion 21 is an example of a shape of the collar portion, and the shape of the collar portion is not limited to the present embodiment.
  • the cross-sectional shape of the collar portion may be trapezoidal, triangular, ⁇ -shaped square, or the like.
  • the cross-sectional shape of the collar portion is preferably a shape whose width decreases from the bottom portion toward the top portion.
  • the flange portion 21 has a thickness T1
  • the groove portion 22 has a thickness T2.
  • the thickness T1 of the flange portion 21 is preferably 0.3 to 15 mm, more preferably 0.5 to 5 mm
  • the thickness T2 of the groove portion 22 is usually 90% or less, preferably 50% of the thickness T1 of the flange portion 21.
  • it is more preferably 20% or less.
  • the thickness T2 of the groove portion 22 is usually 1% or more, preferably 5% or more of the thickness T1 of the flange portion 21.
  • the thickness T1 of the flange portion 21 is measured as a distance from the lower surface of the topsheet 2 to the highest point of the flange portion 21 based on a cross-sectional photograph or a cross-sectional image of the topsheet 2 in a non-pressurized state. The same applies to the thickness T2 of the groove 22.
  • the flange portion 21 has a width W1
  • the groove portion 22 has a width W2.
  • the width W1 of the flange portion 21 is preferably 0.5 to 30 mm, more preferably 1.0 to 10 mm
  • the width W2 of the groove portion 22 is preferably 0.1 to 30 mm, more preferably 0.5 to 10 mm. It is.
  • the interval between the flange portions 21 is usually equal to the width W2 of the groove portion, and the interval between the groove portions 22 is usually equal to the width of the flange portion 21.
  • the width W1 of the flange portion 21 is measured as a distance between the boundary lines with the groove portion 22 located on both sides of the flange portion 21 based on a planar photograph or a plane image of the top sheet 2 in a non-pressurized state. .
  • the width W2 of the groove 22 is the same.
  • the thickness T1 and the width W1 of the flange 21 are substantially the same in any flange 21, but there may be flanges having different thicknesses and widths.
  • the thickness T2 and the width W2 of the groove portion 22 are substantially the same in any groove portion 22, but there may be groove portions having different thicknesses and widths.
  • the collar portion 21 includes a central portion 211 located in the center in the short direction X, and both side portions 212 a and 212 b located on both sides in the short direction X with respect to the central portion 211.
  • the central portion 211 is thicker than the side portions 212a and 212b, and has a fiber density lower than the average fiber density of the entire collar portion 21.
  • the fiber density of the center part 211 is substantially uniform.
  • Both side portions 212a and 212b are thinner than the central portion 211, and have a fiber density higher than the average fiber density of the entire collar portion 21.
  • the fiber density of both side parts 212a and 212b is substantially uniform.
  • the fiber density of the central portion 211 and the side portions 212a and 212b are both higher than the fiber density of the groove portion 22. Therefore, the groove part 22 is a low fiber density area
  • the fiber density of the central portion 211 of the collar portion 21 is preferably 0.005 to 0.20 g / cm 3 , more preferably 0.007 to 0.07 g / cm 3 .
  • the fiber density of the central portion 211 is less than 0.005 g / cm 3 , when force (for example, body pressure of the wearer) is applied to the sanitary napkin 1, the central portion 211 is easily crushed and the absorbent body 4 The absorbed liquid excretion is likely to return backward through the central portion 211.
  • force for example, body pressure of the wearer
  • liquid excreta tends to stay in the central portion 211.
  • the fiber density of both side portions 212a and 212b of the flange portion 21 is preferably 0.007 to 0.40 g / cm 3 , more preferably 0.01 to 0.20 g / cm 3 .
  • both side portions 212a and 212b are easily stretched by line tension.
  • the fiber density of both side portions 212a and 212b is larger than 0.40 g / cm 3 , liquid excrement tends to stay in both side portions 212a and 212b.
  • the average fiber density of the entire collar portion 21 is preferably 0.005 to 0.2 g / cm 3 , more preferably 0.007 to 0.07 g / cm 3 .
  • Fiber density of the groove 22 is preferably 0.002 ⁇ 0.18g / cm 3, more preferably 0.005 ⁇ 0.05g / cm 3.
  • the fiber density of the groove part 22 is smaller than 0.002 g / cm 3 , the groove part 22 of the top sheet 2 is easily damaged when the sanitary napkin 1 is used.
  • the fiber density of the groove part 22 is larger than 0.18 g / cm ⁇ 3 >, liquid excretion will stay in the groove part 22 easily.
  • the average basis weight of the whole nonwoven fabric used as the top sheet 2 is preferably 10 to 200 g / m 2 , more preferably 20 to 100 g / m 2 . If the average basis weight is less than 10 g / m 2 , the top sheet 2 may be damaged when the sanitary napkin 1 is used. On the other hand, the average basis weight of greater than 200 g / m 2, the liquid excrement tends to stay in the top sheet 2.
  • the basis weight of the groove portion 22 is adjusted to be smaller than the basis weight of the flange portion 21 and smaller than the average basis weight of the entire nonwoven fabric.
  • the basis weight of the groove 22 is preferably 3 to 150 g / m 2 , more preferably 5 to 80 g / m 2 . If the basis weight of the groove 22 is less than 3 g / m 2 , the top sheet 2 may be damaged when the sanitary napkin 1 is used. On the other hand, when the basis weight of the groove part 22 is larger than 150 g / m 2 , liquid excrement tends to stay in the groove part 22.
  • the collar portion 21 is adjusted so that the average basis weight is higher than that of the groove portion 22.
  • the basis weight of the central portion 211 of the collar portion 21 is usually 15 to 250 g / m 2 , preferably 20 to 120 g / m 2 .
  • the central portion 211 is liable to be crushed and the liquid excretion absorbed by the absorbent body 4 is easily returned under pressure.
  • the basis weight of the central portion 211 is larger than 250 g / m 2 , liquid excreta tends to stay in the central portion 211.
  • the basis weight of both side portions 212a and 212b of the flange portion 21 is preferably 20 to 280 g / m 2 , more preferably 25 to 150 g / m 2 . If the basis weight of both side portions 212a and 212b is smaller than 20 g / m 2 , both side portions 212a and 212b are easily stretched by line tension. On the other hand, if the basis weights of both side portions 212a and 212b are larger than 280 g / m 2 , the transferability of liquid excreta is lowered and the liquid excrement tends to stay in both side portions 212a and 212b.
  • the average basis weight of the groove portion 22 is adjusted to be lower than the average basis weight of the entire flange portion 21.
  • the average basis weight of the groove portion 22 is usually 90% or less, preferably 3 to 90%, more preferably 3 to 70% of the average basis weight of the entire flange portion 21. If the average basis weight of the groove part 22 is larger than 90% of the average basis weight of the entire collar part 21, liquid excrement tends to stay in the groove part 22, and liquid excrement may overflow from the groove part 22. On the other hand, if the average basis weight of the entire groove portion 22 is smaller than 3% of the average basis weight of the entire collar portion 21, the top sheet 2 may be damaged when the sanitary napkin 1 is used.
  • the nonwoven fabric used as the top sheet 2 preferably contains thermoplastic resin fibers.
  • a nonwoven fabric contains a thermoplastic resin fiber
  • the morphology of the collar part 21 and the groove part 22 can be maintained by heat-seal
  • the thermoplastic resin constituting the thermoplastic resin fiber include polyolefin, polyester, polyamide, and the like.
  • polystyrene resin examples include, for example, linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), polypropylene, polybutylene, and copolymers based on these (for example, Ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ethylene-acrylic acid copolymer (EAA), ionomer resin) and the like.
  • LLDPE linear low density polyethylene
  • LDPE low density polyethylene
  • MDPE medium density polyethylene
  • HDPE high density polyethylene
  • EVA Ethylene-vinyl acetate copolymer
  • EAA ethylene-ethyl acrylate copolymer
  • EAA ethylene-acrylic acid copolymer
  • polyesters examples include linear or branched carbon atoms of up to 20 including polyethylene terephthalate (PET), polytrimethyl terephthalate (PTT), polybutylene terephthalate (PBT), polylactic acid, and polyglycolic acid. And polyesters such as polyhydroxyalkanoic acid, copolymers based on these, and copolymerized polyesters obtained by copolymerizing alkylene terephthalate as a main component with a small amount of other components.
  • polyamide examples include 6-nylon and 6,6-nylon.
  • the fineness of the thermoplastic resin fiber is usually 1.1 to 8.8 dtex, preferably 2.2 to 5.6 dtex, and the fiber length is usually 20 to 100 mm, preferably 35 to 65 mm.
  • the thermoplastic resin fiber may be hydrophilized.
  • the hydrophilic treatment of thermoplastic resin fibers include, for example, treatment using a surfactant, a hydrophilic agent, etc. (for example, kneading of a surfactant inside the fiber, application of a surfactant to the fiber surface, etc.), etc. Is mentioned.
  • a nonwoven fabric is formed by placing a fiber web on a breathable support member (for example, a net-like support member) and continuously blowing gas onto the upper surface of the fiber web while moving the breathable support member in a predetermined direction.
  • the flange portion 21 and the groove portion 22 are formed in the bottom.
  • the groove part 22 extended in the moving direction of a breathable support member is formed in the area
  • the fiber density of both side portions 212a and 212b of the flange portion 21 is increased.
  • the fiber density of the flange portion 21 and the groove portion 22 can be adjusted to a desired range by adjusting conditions such as the amount of gas blown and the tension of the fiber web.
  • the thickness and density of the nonwoven fabric can be measured as follows.
  • the thickness of the nonwoven fabric having a size of 100 mm ⁇ 100 mm is measured under no load, and the average value of the measured values for the ten nonwoven fabrics is defined as the thickness t 0 (cm) of the nonwoven fabric.
  • a mass w 0 (g / cm 2 ) per unit area is obtained from the mass of 10 nonwoven fabrics having a size of 100 mm ⁇ 100 mm, and the value of w 0 / t 0 is defined as a density under no load.
  • the sanitary napkin 1 may include a liquid permeable sheet other than the top sheet 2.
  • the liquid permeable sheet other than the top sheet 2 include a second sheet disposed between the top sheet 2 and the absorber 4.
  • the liquid permeable sheet used as the second sheet include a nonwoven fabric, a woven fabric, and a synthetic resin film in which liquid permeable holes are formed. Among these, a nonwoven fabric is preferable.
  • the specific example of the fiber which comprises a nonwoven fabric, and the specific example of the manufacturing method of a nonwoven fabric are the same as the specific example described regarding the top sheet 2. FIG.
  • the back sheet 3 is a liquid impervious sheet through which liquid excretion excreted from the wearer cannot permeate.
  • the backsheet 3 preferably has moisture permeability in addition to liquid impermeability in order to reduce stuffiness when worn.
  • the type, thickness, basis weight, etc. of the liquid impermeable sheet used as the back sheet 3 are not particularly limited as long as the liquid excretion excreted from the wearer cannot permeate.
  • the liquid-impermeable sheet used as the back sheet 3 include a waterproof nonwoven fabric, a synthetic resin (for example, polyethylene, polypropylene, polyethylene terephthalate, etc.) film, a composite sheet of a nonwoven fabric and a synthetic resin film (for example, a span).
  • an SMS nonwoven fabric in which a melt-blown nonwoven fabric having high water resistance is sandwiched between strong spunbond nonwoven fabrics, and the like.
  • the absorbent body 4 includes an absorbent core 41, a topsheet-side covering sheet 42 that covers the surface of the absorbent core 41 on the topsheet 2 side, and a backsheet side of the absorbent core 41. It has the back sheet side coating sheet 43 which coat
  • the top sheet side covering sheet 42 is bonded to the top sheet side surface of the absorbent core 41 with an adhesive (for example, hot melt adhesive), and the back sheet side covering sheet 43 is the back sheet side of the absorbent core 41. It is preferable to be bonded to the surface by an adhesive (for example, a hot melt adhesive).
  • an adhesive for example, a hot melt adhesive.
  • seat side coating sheet 43 and the fall of the transferability of the liquid excretion resulting therefrom can be prevented.
  • the adhesive is not applied to the entire interface between the top sheet side covering sheet 42 and the absorbent core 41 and the entire interface between the back sheet side covering sheet 43 and the absorbent core 41.
  • the coating is performed in a pattern such as a dot, a spiral, or a stripe.
  • the adhesive for example, styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS) or the like mainly composed of rubber or linear low density Pressure-sensitive adhesive or heat-sensitive adhesive mainly composed of olefin such as polyethylene; water-soluble polymer (for example, polyvinyl alcohol, carboxymethyl cellulose, gelatin, etc.) or water-swellable polymer (for example, polyvinyl acetate, polyacrylic acid) And water-sensitive adhesives such as sodium).
  • SEBS styrene-ethylene-butadiene-styrene
  • SBS styrene-butadiene-styrene
  • SIS styrene-isoprene
  • the coating amount (basis weight) of the adhesive is usually 0.1 to 200 g / m 2 , preferably 1 to 100 g / m 2 .
  • the length and width of the covering sheets 42 and 43 are larger than the length and width of the absorbent core 41, and the portion of the covering sheets 42 and 43 that extends from the absorbent core 41 is the covering sheet 42. , 43 are bonded by an adhesive applied to at least one of them (for example, a hot melt adhesive). Therefore, in the present embodiment, the entire absorbent core 41 is covered with the covering sheets 42 and 43.
  • such a covering form by the covering sheets 42 and 43 is an example of a covering form of the absorbent core by the top sheet side covering sheet and the back sheet side covering sheet, and by the top sheet side covering sheet and the back sheet side covering sheet.
  • the covering form of the absorbent core is not limited to this embodiment.
  • the length and width of the topsheet-side covering sheet may be substantially the same as or less than the length and width of the topsheet-side surface of the absorbent core.
  • the length and width of the backsheet-side cover sheet may be substantially the same as or less than the length and width of the backsheet-side surface of the absorbent core.
  • the absorbent core 41 contains absorbent fibers capable of absorbing and holding liquid excretion excreted from the wearer.
  • the kind of the absorbent fiber contained in the absorbent core 41 is not particularly limited as long as the liquid excretion excreted from the wearer can be absorbed and retained.
  • the absorbent core 41 may contain a superabsorbent material (for example, a superabsorbent resin, a superabsorbent fiber, etc.) in addition to the absorbent fiber.
  • the absorbent core 41 is made of an antioxidant, a light stabilizer, an ultraviolet absorber, a neutralizer, a nucleating agent, an epoxy stabilizer, a lubricant, an antibacterial agent, a flame retardant, an antistatic agent, a pigment, a plasticizer, and the like. You may contain an additive as needed.
  • the absorptive fibers include cellulosic fibers
  • examples of the cellulosic fibers include wood pulp obtained from softwood or hardwood as a raw material (for example, groundwood pulp, refiner ground pulp, thermomechanical pulp, chemithermomechanical).
  • Machine pulp such as pulp; chemical pulp such as kraft pulp, sulfide pulp and alkali pulp; semi-chemical pulp etc.); mercerized pulp or crosslinked pulp obtained by subjecting wood pulp to chemical treatment; bagasse, kenaf, bamboo, hemp, Non-wood pulp such as cotton (for example, cotton linter); regenerated cellulose such as rayon and fibril rayon; semi-synthetic cellulose such as acetate and triacetate.
  • the superabsorbent material examples include starch, cellulose, and synthetic polymer superabsorbent materials.
  • examples of the starch-based or cellulose-based superabsorbent material include starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked products of sodium carboxymethyl cellulose.
  • high-absorbency materials include polyacrylates, polysulfonates, maleic anhydrides, polyacrylamides, polyvinyl alcohols, polyethylene oxides, polyaspartates, polyglutamates , Polyalginate-based, starch-based, cellulose-based superabsorbent resins (Superabsorbent® Polymer: SAP), etc., among which polyacrylate-based (especially sodium polyacrylate-based) superabsorbent Resins are preferred.
  • the shape of the superabsorbent material include a particulate shape, a fibrous shape, and a scaly shape. In the case of the particulate shape, the particle size is preferably 50 to 1000 ⁇ m, more preferably 100 to 600 ⁇ m. .
  • the absorbent core 41 contains a superabsorbent material (for example, a superabsorbent resin, a superabsorbent fiber, etc.), the content of the superabsorbent material is usually 5 to 80% by mass of the absorbent core 41, preferably Is 10 to 60% by mass, more preferably 20 to 40% by mass.
  • a superabsorbent material for example, a superabsorbent resin, a superabsorbent fiber, etc.
  • the thickness, basis weight, and the like of the absorbent core 41 can be appropriately adjusted according to characteristics (for example, absorbency, strength, lightness, etc.) that the sanitary napkin 1 should have.
  • the thickness of the absorbent core 41 is usually 0.1 to 20 mm, preferably 1 to 15 mm, and the basis weight is usually 30 to 1500 g / m 2 , preferably 50 to 1000 g / m 2 .
  • the top sheet side covering sheet 42 and the back sheet side covering sheet 43 are liquid permeable sheets through which liquid excretion excreted from the wearer can permeate.
  • the kind, thickness, basis weight, etc. of the liquid permeable sheet used as the top sheet side covering sheet 42 and the back sheet side covering sheet 43 are not particularly limited as long as the liquid excretion excreted from the wearer can permeate.
  • Examples of the liquid permeable sheet used as the top sheet side covering sheet 42 and the back sheet side covering sheet 43 include a nonwoven fabric, a woven fabric, and a synthetic resin film in which liquid permeable holes are formed. Nonwoven fabric is preferred.
  • the specific example of the fiber which comprises a nonwoven fabric, and the specific example of the manufacturing method of a nonwoven fabric are the same as the specific example described regarding the top sheet 2.
  • nonwoven fabric used as the top sheet side coating sheet 42 and the back sheet side coating sheet 43 for example, an air-through nonwoven fabric, a spunbond nonwoven fabric, a point bond nonwoven fabric, a spunlace nonwoven fabric, a needle punch nonwoven fabric, a melt blown nonwoven fabric, and a combination thereof (for example, spunbond, meltblown, spunbond (SMS) non-woven fabric, etc.) are mentioned.
  • the non-woven fabric used as the topsheet-side covering sheet 42 is preferably an air-through non-woven fabric
  • the nonwoven fabric used as 43 is preferably an SMS nonwoven fabric or an airlaid nonwoven fabric.
  • the air-through nonwoven fabric has a relatively large interfiber distance
  • the use of the air-through nonwoven fabric as the top sheet-side covering sheet 42 can suppress the retention of liquid excrement in the top sheet-side covering sheet 42, thereby The transferability of liquid excretion from the sheet-side covering sheet 42 to the absorbent core 41 can be improved.
  • the SMS nonwoven fabric has high rigidity, by using the SMS nonwoven fabric as the backsheet-side covering sheet 43, deformation that may occur during use of the sanitary napkin 1 can be suppressed.
  • the backsheet-side covering sheet 43 by using an airlaid nonwoven fabric as the backsheet-side covering sheet 43, the liquid excrement transferred from the absorbent core 41 to the backsheet-side covering sheet 43 can diffuse in the surface direction of the backsheet-side covering sheet 43. Thereby, the absorptivity and the retainability of the liquid excrement of the absorber 4 can be improved.
  • the backsheet-side covering sheet 43 is an airlaid nonwoven fabric containing hydrophilic fibers, such an effect becomes more remarkable.
  • the air-through nonwoven fabric can be produced, for example, by spraying hot air on a web containing thermoplastic resin fibers to heat-seal the thermoplastic resin fibers, and the air-laid nonwoven fabric can be produced, for example, from a web containing hydrophilic fibers. After forming by the airlaid method, it can be produced by bonding the fibers constituting the web with a binder.
  • Specific examples of the hydrophilic fiber are the same as the specific examples of the absorbent fiber described for the
  • the nonwoven fabric used as the top sheet side covering sheet 42 and the back sheet side covering sheet 43 is a nonwoven fabric containing thermoplastic resin fibers. Thereby, the intensity
  • the thermoplastic resin fiber may be hydrophilized. Specific examples of the thermoplastic resin fibers and specific examples of the hydrophilic treatment of the thermoplastic resin fibers are the same as the specific examples described for the top sheet 2.
  • the pressing recess 45 formed by pressing the backsheet-side covering sheet 43 in the direction of the absorbent core 41 has a concave surface toward the topsheet 2.
  • a space is formed between the compressed recess 45 and the backsheet 3.
  • the absorber 4 has a central portion 40a located in the center in the longitudinal direction Y, and both side portions 40b and 40c located on both sides in the longitudinal direction Y with respect to the central portion 40a.
  • the pressing recess 45 is formed in the both side portions 40b and 40c, but is not formed in the central portion 40a.
  • liquid excrement having a relatively high flow rate immediately after being supplied to the top sheet 2 can be absorbed.
  • the liquid excrement having a relatively low flow velocity flowing through the surface of the top sheet 2 is absorbed by the absorbent body 4. Can be pulled into.
  • the pressing recess 45 includes a high-pressure pressing recess 451 and a low-pressure pressing recess 452.
  • “High-pressure expression” and “low-pressure expression” mean the relative height of the expression, and as shown in FIG. 3, the thickness of the high-pressure depression 451 formed by high-pressure expression is compared with the thickness of the low-pressure depression 452. Thus, the thickness of the low-pressure depression 452 formed by low-pressure squeezing is relatively larger than the thickness of the high-pressure depression 451.
  • the thickness of the high-pressure depression 451 is preferably 0.05 to 0.3 mm, more preferably 0.05 to 0.2 mm, and the thickness of the low-pressure depression 452 is preferably 0.3 to 0.8 mm, Preferably, it is 0.3 to 0.7 mm.
  • the fiber density of the high-pressure squeezed recess 451 formed by high-pressure squeezing is relatively large compared to the fiber density of the low-pressure squeezed concave 452, and the fiber density of the low-pressure squeezed concave 452 formed by low-pressure squeezing is The fiber density is relatively large.
  • the fiber density of the high-pressure depression 451 is preferably 0.15 to 0.30 g / cm 3 , more preferably 0.15 to 0.25 g / cm 3
  • the fiber density of the low-pressure depression 452 is preferably 0. 0.06 to 0.2 g / cm 3 , more preferably 0.08 to 0.15 g / cm 3 .
  • the fiber density of the low pressing recessed part 452 is smaller than the thickness of the area
  • the stiffness of 452 is higher than the stiffness of region 46.
  • the fiber density of the low pressure recessed part 452 is larger than the fiber density of the groove part 22. Therefore, the transferability of the liquid excretion from the groove part 22 to the low pressing recessed part 452 can be improved using the characteristic of the liquid that it is easy to transfer to a part with a high fiber density from a part with a low fiber density.
  • the fiber density of the high pressure recessed part 451 is larger than the fiber density of the collar part 21. Therefore, the liquid excretion remaining in the flange portion 21 and the groove portion 22 of the top sheet 2 is drawn into the high-pressure squeezed recess portion 451 by utilizing the characteristic of the liquid that it is easy to shift from the low fiber density portion to the high fiber density portion. be able to.
  • the low pressing recesses 452 are formed in a mesh pattern, and the high pressing recesses 451 are mesh-like. It is formed so as to be scattered in the pattern.
  • the high-pressure recessed portion 451 is formed in the intersecting region of the mesh pattern.
  • the high pressing recesses 451 are scattered in the short direction X and the long direction Y
  • the low pressing recesses 452 are formed so as to connect the high pressing recesses 451 in the short direction X and the long direction Y.
  • the mesh pattern of the low pressure depression 452 can be maintained.
  • each mesh in the mesh pattern of the low-pressure depression 452 is a regular hexagon, and the high-pressure depression 451 is arranged at the apex of the regular hexagon,
  • the low pressure recessed part 452 is arrange
  • one high pressing recessed part 451 is comprised by four component 451a, 451b, 451c, 451d which adjoins mutually, and component 451a, 451b, 451c, 451d are each formed in a rectangular shape in plan view.
  • the low pressing recessed part 452 is arrange
  • the low pressure depression 452 (the low pressure depression 452 extending from the high pressure depression 451 downward, upper left and right upward, respectively, a first low pressure depression 452p, a second low pressure depression 452q, and a third low pressure depression 452r, respectively.
  • the angle ⁇ 1 formed by the first low pressure depression 452p and the second low pressure depression 452q, the angle ⁇ 2 formed by the first low pressure depression 452p and the third low pressure depression 452r, and the second The angle ⁇ 3 formed by the low-pressure depression 452q and the third low-pressure depression 452r is 120 degrees. That is, in this embodiment, in the three low-pressure depressions 452 extending from one high-pressure depression 451, the first direction in which one arbitrarily selected low-pressure depression 452 extends and the remaining low-pressure depressions 452 are arbitrarily selected.
  • the plurality of low-pressure squeezing recesses 452 are arranged so that the second direction in which the single low-squeezing recess 452 extends is not 180 degrees (so as not to be linear).
  • Such an arrangement pattern of the high pressing depression 451 and the low pressing depression 452 is an example of an arrangement pattern of the high pressing depression and the low pressing depression, and the arrangement pattern of the high pressing depression and the low pressing depression is limited to the present embodiment. It is not something.
  • the pressing recess 45 is formed by heat embossing the absorbent body 4 from the cover sheet 43 side.
  • a predetermined portion of the surface of the backsheet-side covering sheet 43 is compressed in the direction of the absorbent core 41 until reaching the topsheet-side covering sheet 42 and heated, whereby the backsheet-side covering sheet 43 is heated.
  • a high-pressure recessed portion 451 for integrating the absorbent core 41 and the top sheet-side covering sheet 42 is formed.
  • the predetermined portion of the surface of the backsheet side covering sheet 43 is compressed in the direction of the absorbent core 41 until reaching the absorbent core 41 and heated, whereby the backsheet side covering sheet 43 and the absorption are obtained.
  • a low-pressure squeezed recess 452 that integrates the sex core 41 is formed.
  • the heat embossing treatment is performed, for example, between an embossing roll having convex portions provided on the outer peripheral surface and a flat roll having a smooth outer peripheral surface, the back sheet side covering sheet 43, the absorbent core 41, and the top sheet side covering sheet. It is carried out by passing the laminated body in which 42 is sequentially laminated and embossing from the back sheet side covering sheet 43 side. Under the present circumstances, the heating at the time of compression is possible by heating of an embossing roll and / or a flat roll.
  • the convex part of the embossing roll is provided so as to correspond to the shape, arrangement pattern, and the like of the high-pressure recessed part 451 and the low-pressure recessed part 452.
  • a method for forming the pressing recess 45 including the high-pressure pressing recess 451 and the low-pressure pressing recess 452 is described in detail in Japanese Patent Application Laid-Open No. 2013-78366.
  • the high pressing recessed portion 451 appears on the top sheet side surface of the top sheet side covering sheet 42 because the back sheet side covering sheet 43, the absorbent core 41 and the top sheet side covering sheet 42 are integrated.
  • the low-pressure recessed portion 452 does not appear on the top sheet side surface of the top sheet side covering sheet 42 because the back sheet side covering sheet 43 and the absorbent core 41 are integrated.
  • the high-pressure recessed portion 451 integrates the backsheet-side covering sheet 43, the absorbent core 41 and the topsheet-side covering sheet 42, but the backsheet-side covering sheet 43 and the absorbent core 41 are integrated. It may be converted.
  • the backsheet side covering sheet 43 and / or the absorbent core 41 is effectively integrated by integrating the backsheet side covering sheet 43 and the absorbent core 41 by thermal fusion of thermoplastic resin fibers. It is preferable to contain a thermoplastic resin fiber. In the heat embossing treatment, the back sheet side covering sheet 43, the absorbent core 41, and the top sheet side covering sheet 42 are effectively integrated by thermal fusion of thermoplastic resin fibers. It is preferable that one or two or more of the absorbent core 41 and the topsheet-side covering sheet 42 contain thermoplastic resin fibers.
  • the thermoplastic resin fiber may be hydrophilized. Specific examples of the thermoplastic resin fibers and specific examples of the hydrophilic treatment of the thermoplastic resin fibers are the same as the specific examples described for the top sheet 2.
  • the sanitary napkin 1 has an inner pressing groove 5a and an outer pressing groove 5b formed by pressing the top sheet 2 in the direction of the absorbent body 4.
  • the inner side pressing groove 5a is intermittently formed in the periphery of the surface area
  • the outer side pressing groove 5b is formed in the outer side of the inner side pressing groove 5b.
  • a pressing groove is not essential for the sanitary napkin 1, and the presence / absence of the inner pressing groove and the outer pressing groove, the formation pattern, and the like can be changed as appropriate.
  • the inner pressing groove 5a and the outer pressing groove 5b are recesses formed by heat embossing.
  • a predetermined part of the skin side surface of the top sheet 2 is compressed and heated in the direction of the absorbent body 4 until it reaches the absorbent core 41.
  • the inner side pressing groove 5a and the outer side pressing groove 5b which integrate the top sheet 2, the top sheet side coating sheet 42, and the absorptive core 41 are formed as a recessed part.
  • the top sheet 2 and the absorbent body 4 are passed between an embossing roll having convex portions provided on the outer peripheral surface and a flat roll having a smooth outer peripheral surface, and from the top sheet 2 side.
  • embossing Implemented by embossing.
  • the heating at the time of compression is possible by heating of an embossing roll and / or a flat roll.
  • the convex part of the embossing roll is provided so as to correspond to the shape, arrangement pattern, and the like of the inner pressing groove 5a and the outer pressing groove 5b.
  • the heating temperature is usually 80 to 180 ° C., preferably 120 to 160 ° C.
  • the pressure is 10 to 3000 N / mm, preferably 50 to 500 N / mm
  • the treatment time is usually 0.0001 to 5 seconds, preferably 0. 0.005 to 2 seconds.
  • the top sheet 2, the top sheet side covering sheet 42, and the absorbent core 41 are effectively integrated by thermal fusion of thermoplastic resin fibers. And it is preferable that 1 or 2 or more of the absorptive core 41 contains a thermoplastic resin fiber.
  • FIG. 7 shows a projection region of the groove portion 22 that is generated when the groove portion 22 of the top sheet 2 and the low-pressure depression 452 of the absorber 4 are projected onto a virtual plane P (see FIGS. 1 to 3) perpendicular to the thickness direction Z. It is a partial enlarged view of the virtual plane P which shows the overlap with the projection area
  • the projection region R1 of the groove 22 is shown on the back side of the drawing, and the projection region R2 of the low-pressure depression 452 is shown on the front side of the drawing.
  • the projection area R1 of the groove 22 has an overlap L with the projection area R2 of the low-pressure depression 452. That is, the groove part 22 and the low pressure recessed part 452 are arrange
  • the ratio of the portion overlapping the projection region R2 of the low-pressure depression 452 in the projection region R1 of the groove 22 is preferably 2% or more, more preferably 5% or more, and even more preferably 7% or more. Thereby, the transferability of the liquid excretion from the groove part 22 of the top sheet 2 to the low pressing recessed part 452 of the absorber 4 can be improved.
  • the ratio of the portion overlapping the projection region R2 of the low-pressure depression 452 in the projection region R1 of the groove 22 is usually 50% or less, preferably 30% or less.
  • region of the high pressing recessed part 451 is included in the projection area
  • the low-pressure recessed portion 452 has an extending portion (for example, the first low-pressure recessed portion 452 p) extending in the longitudinal direction Y, and the projection region R ⁇ b> 1 of the groove portion 22. However, it has the overlap L with the projection area
  • the proportion of the portion of the extended portion of the low-pressure depression 452 that overlaps with the projection region R21 is preferably 5% or more, more preferably 7% or more, and even more preferably 10% or more. .
  • region R1 of the groove part 22 is 50% or less normally, Preferably it is 30% or less.
  • the overlap L between the projection region R1 of the groove 22 and the projection region R21 of the extended portion of the low-pressure depression 452 extends over the entire short direction X of the projection region R1 of the groove 22. Arise. Thereby, the transferability of the liquid excretion from the groove part 22 of the top sheet 2 to the extension part of the low pressing recessed part 452 can be improved.
  • the width of the groove portion 22 is equal to or less than the width of the low-pressure recessed portion 452.
  • the overlap L between the projection region R1 of the groove 22 and the projection region R2 of the low-pressure squeezed recess 452 is the projection of the extended portion of the projection region R1 of the groove 22 and the low-squeeze dent 452. This coincides with the overlap L with the region R21.
  • the projection area of the groove portion has an overlap with the projection area of the portion other than the extension portion of the low-pressure depression in addition to the overlap with the projection area of the extension portion of the low-pressure depression. May be changed. Such a change can be realized by changing the number of grooves and / or the interval. For example, in FIG.
  • the groove projection area overlaps with the projection area of the extension portion of the low-pressure depression, It will have an overlap with the projection area
  • the projection region of the groove portion is the same as the projection region of the extension portion of the low-pressure depression.
  • the projection region of the portion other than the extended portion of the low-pressure recessed portion there will be an overlap with the projection region of the portion other than the extended portion of the low-pressure recessed portion. Two or more kinds of these changes may be combined.
  • the top sheet 2 is a non-woven fabric having a ridge portion 21 corresponding to a high fiber density region and a groove portion 22 corresponding to a low fiber density region
  • the absorbent body 4 includes an absorbent core 41 containing absorbent fibers and an absorbent.
  • the top sheet side covering sheet 42 that covers the top sheet side surface of the absorbent core 41, the back sheet side covering sheet 43 that covers the back sheet side surface of the absorbent core 41, and the back sheet side covering sheet 43 Squeezing recesses 45 formed by squeezing in the direction of squeezing, and the pressing recesses 45 are formed so as to be scattered in the squeezed recesses 452 formed in a mesh pattern and in the mesh pattern.
  • the projection area of the groove 22 is low-pressure squeezed.
  • the sanitary napkin 1 can exhibit the following advantages.
  • the groove 22 (low fiber density region) of the top sheet 2 is less liable to retain liquid excrement than the collar portion 21 (high fiber density region), so the liquid excrement supplied to the top sheet 2 It is easy to move to the absorber 4 through the groove 22.
  • the groove portion 22 of the top sheet 2 and the low pressure depression 452 of the absorbent body 4 are arranged such that the projection region R1 of the groove portion 22 has an overlap L with the projection region R2 of the low pressure depression 452 (that is, the thickness of the sanitary napkin 1 Since the liquid excrement supplied to the top sheet 2 moves to the absorbent body 4 through the groove portion 22 of the top sheet, the liquid excrement is compressed into the depression 4 of the absorbent body 4. It is easy to move to 452. Since the low pressure depression 452 of the absorbent body 4 is formed in a mesh pattern, the liquid excretion transferred to the low pressure depression 452 of the absorbent body 4 may diffuse throughout the absorbent body 4 along the mesh pattern. it can. Therefore, the sanitary napkin 1 can exhibit improved transferability of liquid excreta from the top sheet 2 to the absorber 4.
  • the top sheet 2 When the liquid excreta supplied to the top sheet 2 is menstrual blood, the top sheet 2 has a kinematic viscosity of 0.01 to 80 mm 2 / s at 40 ° C. and a water retention of 0.01 to 4.0% by mass. It is preferable that a blood slipperiness imparting agent having a weight average molecular weight of less than 1,000 is applied.
  • the blood slipperiness-imparting agent is applied to, for example, the surface region 20 of the topsheet 2 or a region including the surface region 20 (for example, substantially the entire skin-side surface of the topsheet 2 or substantially the entire absorber arrangement region). Can do.
  • the blood slipperiness imparting agent When the blood slipperiness imparting agent is coated on the top sheet 2, the following effects are exhibited.
  • the menstrual blood supplied to the top sheet 2 can slide into the groove 22 (low fiber density region) together with the blood slipperiness imparting agent present in the top sheet 2 and can migrate to the absorbent body 4. Therefore, menstrual blood remaining in the top sheet 2 can be reduced, the sticky feeling of the top sheet 2 can be prevented, and the smooth feeling can be maintained.
  • the effect of such a blood slipperiness-imparting agent is exerted irrespective of changes in menstrual blood discharge (that is, whether menstrual blood discharged at a time is large or small). .
  • lubricity imparting agent acts also as a lubrication agent and reduces the friction between fibers, the suppleness of the whole top sheet 2 can be improved.
  • the sanitary napkin 1 is different from known absorbent articles including skin care compositions, lotion compositions, etc., and does not require components such as emollients and immobilizing agents. It can be applied to the sheet 2.
  • the basis weight of the blood slipperiness imparting agent is usually about 1 to 30 g / m 2 , preferably about 2 to 20 g / m 2 , more preferably about 3 to 10 g / m 2 .
  • the basis weight of the blood slipperiness-imparting agent is less than about 1 g / m 2 , menstrual blood tends to remain in the top sheet 2, while when the basis weight of the blood slipperiness-imparting agent exceeds about 30 g / m 2 , The sticky feeling during wearing tends to increase.
  • the basis weight of the blood slipperiness-imparting agent can be measured, for example, as follows. (1) The range to be measured of the top sheet is cut out with a sharp blade, for example, a cutter blade, so as not to change its thickness as much as possible, and a sample is obtained. (2) The area of the sample: SA (m 2 ) and the mass: SM 0 (g) are measured. (3) The sample is stirred for at least 3 minutes in a solvent capable of dissolving the blood lubricity-imparting agent, such as ethanol, acetone, etc., and the blood lubricity-imparting agent is dissolved in the solvent.
  • a solvent capable of dissolving the blood lubricity-imparting agent such as ethanol, acetone, etc.
  • the sample is filtered on the filter paper whose mass has been measured, and the sample is thoroughly washed with a solvent on the filter paper.
  • the sample on the filter paper is dried in an oven at 60 ° C.
  • the mass of the filter paper and the sample is measured, and the mass of the filter paper is subtracted therefrom to calculate the mass of the sample after drying: SM 1 (g).
  • BBS (g / m 2 ) [SM 0 (g) ⁇ SM 1 (g)] / SA (m 2 ) Calculated by In order to reduce the error, a plurality of samples are collected from a plurality of absorbent articles so that the total area of the samples exceeds 100 cm 2 , the experiment is repeated a plurality of times, and an average value thereof is adopted.
  • the blood slipperiness-imparting agent is preferably applied so as not to block the gaps between the fibers of the topsheet 2.
  • the blood slipperiness imparting agent adheres to the surface of the fiber of the top sheet 2 in the form of droplets or particles, or covers the surface of the fiber.
  • the blood slipperiness-imparting agent is preferably coated so that its surface area becomes large. Thereby, the contact area of a blood slipperiness
  • the surface area can be increased by reducing the particle size.
  • Examples of the method for applying the blood slipperiness-imparting agent include a method using a coating apparatus (for example, a non-contact type coater such as a spiral coater, curtain coater, spray coater, dip coater, contact type coater, etc.).
  • a coating apparatus for example, a non-contact type coater such as a spiral coater, curtain coater, spray coater, dip coater, contact type coater, etc.
  • a preferred coating apparatus is a non-contact type coater.
  • the blood slipperiness imparting agent can be applied as a coating liquid containing a volatile solvent, for example, an alcohol solvent, an ester solvent, an aromatic solvent, or the like, if desired.
  • a volatile solvent for example, an alcohol solvent, an ester solvent, an aromatic solvent, or the like.
  • the blood slipperiness-imparting agent is, for example, a control seam HMA (Hot Melt Adhesive) as it is in the case of a liquid at room temperature or heated to lower the viscosity and heated to be liquefied in the case of a solid at room temperature. ) Can be applied by gun. By increasing the air pressure of the control seam HMA gun, it is possible to apply a particulate blood slipping agent. In addition, the application quantity of a blood slipperiness
  • a control seam HMA Hot Melt Adhesive
  • the blood slipperiness-imparting agent may be applied when the top sheet 2 is produced, or may be applied on the production line of the sanitary napkin 1. From the viewpoint of suppressing capital investment, it is preferable to apply a blood slipperiness-imparting agent in the production line of the sanitary napkin 1, and further suppress the blood slipperiness-imparting agent from dropping and contaminating the line. Therefore, it is preferable to apply the blood slipperiness imparting agent immediately downstream of the production line, specifically, immediately before the product is enclosed in the individual package.
  • the blood slipperiness imparting agent has a kinematic viscosity at 40 ° C. of about 0.01 to about 80 mm 2 / s, a water retention of about 0.05 to about 4.0% by mass, and a weight average molecular weight of about 1 Less than 1,000.
  • the kinematic viscosity at 40 ° C. of the blood slipperiness-imparting agent can be appropriately adjusted in the range of about 0.01 to about 80 mm 2 / s, preferably about 1 to about 70 mm 2 / s, more preferably about 3 From about 60 mm 2 / s, even more preferably from about 5 to about 50 mm 2 / s, and even more preferably from about 7 to about 45 mm 2 / s.
  • the kinematic viscosity at 40 ° C. may be simply referred to as “kinematic viscosity”.
  • the kinematic viscosity is as follows: a) as the molecular weight of the blood slipping agent increases, b) polar groups such as carbonyl bond (—CO—), ether bond (—O—), carboxyl group (—COOH), hydroxyl group ( There is a tendency that the higher the ratio of —OH) and the like, and c) the higher the IOB, the higher the ratio.
  • the melting point of the blood slipperiness imparting agent is preferably 45 ° C. or less. This is because when the blood slipperiness-imparting agent contains crystals at 40 ° C., the kinematic viscosity tends to increase.
  • kinematic viscosity in the blood slipperiness-imparting agent will be described later.
  • the kinematic viscosity exceeds about 80 mm 2 / s, the blood slipperiness-imparting agent is too viscous to reach the skin contact surface of the top sheet. At the same time, it tends to be difficult to slide from the convex portion to the concave portion and then to move into the absorber.
  • the kinematic viscosity can be measured at a test temperature of 40 ° C. using a Cannon Fenceke reverse flow viscometer according to “5. Kinematic viscosity test method” of JIS K 2283: 2000.
  • the water retention rate of the blood slipperiness-imparting agent can be appropriately adjusted within the range of about 0.01 to about 4.0% by mass, preferably about 0.02 to about 3.5% by mass, more preferably About 0.03 to about 3.0% by weight, even more preferably about 0.04 to about 2.5% by weight, even more preferably about 0.05 to about 2.0% by weight.
  • the “water retention” means the ratio (mass) of water that a substance can hold, and can be measured as follows. (1) Place a 20 mL test tube, a rubber stopper, a substance to be measured, and deionized water in a constant temperature room at 40 ° C. overnight. (2) In a constant temperature room, 5.0 g of a substance to be measured and 5.0 g of deionized water are put into a test tube. (3) In a temperature-controlled room, put a rubber stopper on the mouth of the test tube, rotate the test tube once and let it stand for 5 minutes.
  • the affinity between the blood slipperiness-imparting agent and menstrual blood decreases and reaches the skin contact surface of the top sheet.
  • the affinity with menstrual blood becomes very high like a surfactant, and the absorbed blood remains on the skin contact surface of the top sheet, and the skin contact of the top sheet The surface tends to be red and easily colored.
  • the water retention rate is as follows: a) the smaller the molecular weight of the blood slipperiness agent, and b) polar groups such as carbonyl bond (—CO—), ether bond (—O—), carboxyl group (—COOH), hydroxyl
  • polar groups such as carbonyl bond (—CO—), ether bond (—O—), carboxyl group (—COOH), hydroxyl
  • the ratio of the group (—OH) or the like is higher, the value tends to increase. This is because the blood slipperiness imparting agent is more hydrophilic.
  • the water retention rate tends to increase as the IOB increases, that is, as the inorganic value increases and as the organic value decreases. This is because the blood slipperiness-imparting agent is more hydrophilic.
  • menstrual blood excreted from the wearer When menstrual blood excreted from the wearer reaches the excretory opening contact region, it contacts the blood slipperiness imparting agent present in the convex part, slides into the concave part together with this, passes through the top sheet, and moves to the absorber. .
  • a blood slipperiness-imparting agent having a kinematic viscosity of about 0.01 to about 80 mm 2 / s at 40 ° C. has a very low viscosity around the body temperature of the wearer and has a certain affinity with menstrual blood Therefore, it is considered that menstrual blood can slide from the convex part to the concave part together with menstrual blood, and can pass through the top sheet and quickly migrate to the absorbent body using the momentum at the time of the sliding.
  • the blood slipperiness-imparting agent present on the convex part has a water retention of about 0.01 to about 4.0% by mass, and therefore has an affinity for mainly hydrophilic components (such as plasma) in menstrual blood. Therefore, it is considered that menstrual blood hardly remains on the top sheet.
  • menstrual blood If there is a large amount of menstrual blood discharged from the wearer, even if the kinetic energy of menstrual blood itself is large and the kinematic viscosity value of the blood slipperiness-imparting agent is relatively high, it is difficult to slip with menstrual blood. Even if the water retention value is relatively high and the affinity with the hydrophilic component of menstrual blood is high, the weight molecular weight value is relatively high and difficult to slide with menstrual blood, and the top sheet Even when there is no uneven structure on the skin contact surface, it is considered that menstrual blood easily migrates to the absorber.
  • the blood slipperiness-imparting agent slides down from the convex part to the concave part together with menstrual blood, and draws menstrual blood into the top sheet, and then draws it into the absorber, thereby rapidly transferring menstrual blood to the absorber.
  • the blood lubricity-imparting agent has a weight average molecular weight of less than about 1,000, and preferably has a weight average molecular weight of less than about 900. This is because if the weight average molecular weight is about 1,000 or more, the blood slipperiness-imparting agent itself has tackiness and tends to give the wearer discomfort. In addition, since the viscosity of the blood slipperiness-imparting agent tends to increase as the weight average molecular weight increases, it becomes difficult to lower the viscosity of the blood slipperiness-imparting agent to a viscosity suitable for coating by heating, As a result, the blood slipping agent may have to be diluted with a solvent.
  • the blood slipperiness-imparting agent preferably has a weight average molecular weight of about 100 or more, and more preferably has a weight average molecular weight of about 200 or more. This is because when the weight average molecular weight is small, the vapor pressure of the blood slipperiness imparting agent becomes high and vaporizes during storage, causing problems such as a decrease in the amount and odor when worn.
  • weight average molecular weight refers to a polydispersed compound (for example, a compound produced by sequential polymerization, a plurality of fatty acids, and an ester produced from a plurality of aliphatic monohydric alcohols).
  • a weight average molecular weight means the value of polystyrene conversion calculated
  • GPC measurement conditions include the following. Model: Hitachi High-Technologies Corporation High-Performance Liquid Chromatogram Lachrom Elite Column: SHODEX KF-801, KF-803 and KF-804 manufactured by Showa Denko K.K. Eluent: THF Flow rate: 1.0 mL / min Driving amount: 100 ⁇ L Detection: RI (differential refractometer)
  • the weight average molecular weight described in the Example of this specification is measured on the said conditions.
  • the blood slipperiness agent can have an IOB of about 0.00 to about 0.60.
  • IOB Inorganic Organic Balance
  • IOB is an index indicating a balance between hydrophilicity and lipophilicity.
  • Oda et al. IOB value calculated by inorganic value / organic value.
  • the IOB is preferably about 0.00 to about 0.60, more preferably about 0.00 to about 0.50, and about 0.00 to about 0.40. And more preferably from about 0.00 to about 0.30. This is because when the IOB is in the above range, the water holding power and kinematic viscosity easily satisfy the above requirements.
  • the blood slipperiness-imparting agent preferably has a melting point of 45 ° C. or lower, more preferably 40 ° C. or lower. This is because when the blood slipperiness-imparting agent has a melting point of 45 ° C. or less, the blood slipperiness-imparting agent tends to have a kinematic viscosity in the above range.
  • melting point means a peak top temperature of an endothermic peak when changing from a solid state to a liquid state when measured with a differential scanning calorimeter at a heating rate of 10 ° C./min.
  • the melting point can be measured using, for example, a DSC-60 type DSC measuring apparatus manufactured by Shimadzu Corporation.
  • the blood lubricity-imparting agent may be liquid at room temperature (about 25 ° C.) or solid as long as it has a melting point of about 45 ° C. or lower, ie, a melting point of about 25 ° C. or higher, or It may be less than about 25 ° C. and may have a melting point of, for example, about ⁇ 5 ° C., about ⁇ 20 ° C.
  • the blood slipping agent does not have a lower limit for its melting point, but preferably has a low vapor pressure.
  • the vapor pressure of the blood slipperiness imparting agent is preferably about 0 to about 200 Pa at 25 ° C. (1 atm), more preferably about 0 to about 100 Pa, and further preferably about 0 to about 10 Pa. Preferably, it is about 0 to about 1 Pa, and even more preferably about 0.0 to about 0.1 Pa.
  • the vapor pressure is preferably about 0 to about 700 Pa at 40 ° C. (1 atm), and is about 0 to about 100 Pa. Is more preferably about 0 to about 10 Pa, still more preferably about 0 to about 1 Pa, and still more preferably about 0.0 to about 0.1 Pa. This is because if the vapor pressure of the blood slipperiness imparting agent is high, it may vaporize during storage, and problems such as reduction in the amount and odor during wearing may occur.
  • the melting point of the blood slipperiness-imparting agent can be selected according to the climate, the length of wearing time, and the like. For example, in an area where the average temperature is about 10 ° C. or less, by adopting a blood slipperiness imparting agent having a melting point of about 10 ° C. or less, menstrual blood is excreted and then cooled by the ambient temperature. However, it is considered that the blood slipperiness-imparting agent is easy to function.
  • the melting point of the blood slipperiness imparting agent is preferably higher in the range of about 45 ° C. or less. This is because the blood slipperiness-imparting agent is not easily biased even when worn for a long time, and is not easily affected by sweat, friction at the time of wearing.
  • the skin contact surface of the top sheet is coated with a surfactant for the purpose of changing the surface tension of menstrual blood and the like and quickly absorbing menstrual blood.
  • the top sheet coated with a surfactant has a high affinity with hydrophilic components (such as plasma) in menstrual blood, and tends to attract them and rather cause menstrual blood to remain on the top sheet.
  • the blood slipperiness imparting agent has a low affinity for menstrual blood, and can pass the menstrual blood to the absorbent body quickly without remaining on the top sheet.
  • the blood slipperiness imparting agent is preferably the following (i) to (iii): (I) hydrocarbons, (Ii) consisting of a (ii-1) hydrocarbon moiety and (ii-2) a carbonyl group (—CO—) and an oxy group (—O—) inserted between the CC single bonds of the hydrocarbon moiety.
  • One or more of the same or different groups selected from the group consisting of a carbonyl group (—CO—) and an oxy group (—O—), and (iii-3) a hydrogen atom of the hydrocarbon moiety A compound having one or a plurality of identical or different groups selected from the group consisting of a carboxyl group (—COOH) and a hydroxyl group (—OH) to be substituted; As well as any combination thereof.
  • hydrocarbon means a compound composed of carbon and hydrogen, and a chain hydrocarbon, for example, a paraffinic hydrocarbon (also referred to as an alkane, which does not include a double bond and a triple bond).
  • a paraffinic hydrocarbon also referred to as an alkane, which does not include a double bond and a triple bond.
  • Olefinic hydrocarbons including one double bond, also referred to as alkene
  • acetylenic hydrocarbons including one triple bond, also referred to as alkyne
  • hydrocarbons containing two or more bonds selected from the above and cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons.
  • the hydrocarbon is preferably a chain hydrocarbon and an alicyclic hydrocarbon, more preferably a chain hydrocarbon, paraffinic hydrocarbon, olefinic hydrocarbon, and two or more double bonds. More preferably, it is a hydrocarbon that does not contain a triple bond, and more preferably it is a paraffinic hydrocarbon.
  • the chain hydrocarbon includes a straight chain hydrocarbon and a branched chain hydrocarbon.
  • each oxy group (—O—) is not adjacent. Therefore, the compounds (ii) and (iii) do not include compounds having a continuous oxy group (so-called peroxides).
  • At least one hydrogen atom in the hydrocarbon moiety is more hydroxyl group (—OH) than in the compound in which at least one hydrogen atom in the hydrocarbon moiety is substituted with a carboxyl group (—COOH).
  • a carboxyl group —COOH
  • IOB is preferred. This is because the carboxyl group binds to a metal or the like in menstrual blood, increases the water retention rate of the blood slipperiness imparting agent, and may exceed a predetermined range. This is the same from the viewpoint of IOB. As shown in Table 1, the carboxyl group binds to menstrual metals and the like, and the inorganic value increases significantly from 150 to 400 or more. Sometimes the value of IOB can be greater than about 0.60.
  • the blood slipperiness imparting agent is more preferably the following (i ′) to (iii ′): (I ′) hydrocarbon, (Ii ′) (ii′-1) a hydrocarbon moiety and (ii′-2) a carbonyl bond (—CO—) or an ester bond (—COO— inserted between the C—C single bonds of the hydrocarbon moiety.
  • the blood slipperiness imparting agent is more preferably about 1.8 or less carbonyl bonds (—CO—) and 2 or less ester bonds (—COO—) per 10 carbon atoms in the hydrocarbon moiety. About 1.5 or less bonds (—OCOO—), about 6 or less ether bonds (—O—), about 0.8 or less carboxyl groups (—COOH), and / or hydroxyl groups (—OH) About 1.2 or less.
  • the blood slipperiness imparting agent is more preferably the following (A) to (F), (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and a chain carbon An ester with a compound having one carboxyl group replacing a hydrogen atom of the hydrogen moiety, (B) (B1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and a chain hydrocarbon An ether with a compound having one hydroxyl group replacing a hydrogen atom of the hydrogen moiety, (C) (C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid containing a chain hydrocarbon moiety and 2 to 4 carboxyl groups that replace the hydrogen atom of the chain hydrocarbon moiety, and (C2 ) An ester of a
  • (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups substituting for hydrogen atoms in the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, Esters with compounds having one carboxyl group replacing a hydrogen atom in the hydrocarbon moiety]
  • (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety;
  • Esters (hereinafter sometimes referred to as “compound (A)”) with a compound having one carboxyl group that substitutes a hydrogen atom of the hydrogen moiety have the above kinematic viscosity, water retention and weight average molecular weight. As long as it has, all the hydroxyl groups do not need to be esterified.
  • (A1) As a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety (hereinafter sometimes referred to as “compound (A1)”), for example, chain hydrocarbon tetraols such as alkane tetraols such as pentaerythritol, chain hydrocarbon triols such as alkane triols such as glycerin, and chain hydrocarbon diols such as alkane diols such as glycol Is mentioned.
  • chain hydrocarbon tetraols such as alkane tetraols such as pentaerythritol
  • chain hydrocarbon triols such as alkane triols such as glycerin
  • chain hydrocarbon diols such as alkane diols such as glycol Is mentioned.
  • Examples of the compound having a chain hydrocarbon moiety and one carboxyl group that replaces a hydrogen atom in the chain hydrocarbon moiety include, for example, one hydrogen atom on a hydrocarbon having one carboxyl group ( -COOH) substituted compounds, for example fatty acids.
  • Examples of the compound (A) include (a 1 ) an ester of a chain hydrocarbon tetraol and at least one fatty acid, (a 2 ) an ester of a chain hydrocarbon triol and at least one fatty acid, and (a 3 ) Esters of chain hydrocarbon diols with at least one fatty acid.
  • ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid examples include the following formula (1): Tetraesters of pentaerythritol and fatty acids of the following formula (2): Triesters of pentaerythritol and fatty acids of the following formula (3): Diester of pentaerythritol and fatty acid of the following formula (4): And monoesters of pentaerythritol and fatty acids. (Wherein R 1 to R 4 are each a chain hydrocarbon)
  • esters of pentaerythritol and fatty acids As fatty acids (R 1 COOH, R 2 COOH, R 3 COOH, and R 4 COOH) constituting esters of pentaerythritol and fatty acids, esters of pentaerythritol and fatty acids have kinematic viscosity, water retention and weight average.
  • a saturated fatty acid for example, a C 2 to C 30 saturated fatty acid, for example, acetic acid (C 2 ) (C 2 represents the number of carbon atoms, R 1 C, R 2 C, R 3 C or R 4 C, the same applies hereinafter), propanoic acid (C 3 ), butanoic acid (C 4 ) and isomers thereof such as 2-methylpropanoic acid ( C 4 ), pentanoic acid (C 5 ) and isomers thereof such as 2-methylbutanoic acid (C 5 ), 2,2-dimethylpropanoic acid (C 5 ), hexanoic acid (C 6 ), heptanoic acid (C 7 ), octanoic acid (C 8) Beauty isomers thereof, e.g., 2-ethylhexanoic acid (C 8), nonanoic acid (C 9), decanoic acid
  • the fatty acid can also be an unsaturated fatty acid.
  • unsaturated fatty acids include C 3 to C 20 unsaturated fatty acids such as monounsaturated fatty acids such as crotonic acid (C 4 ), myristoleic acid (C 14 ), palmitoleic acid (C 16 ), and olein.
  • diunsaturated fatty acids such as linoleic acid (C 18
  • Tetraunsaturated fatty acids such as stear Don acid (C 20), arachidonic acid (C 20), eicosatetraenoic acid (C 20), etc., penta unsaturated fatty acids, for example, bosseopentaenoic acid (C 18), such as eicosapentaenoic acid (C 20), as well as their Of the partial hydrogen adduct.
  • the ester of pentaerythritol and a fatty acid is preferably an ester of pentaerythritol and a fatty acid derived from a saturated fatty acid, that is, an ester of pentaerythritol and a saturated fatty acid, considering the possibility of modification by oxidation or the like.
  • the ester of pentaerythritol and fatty acid is preferably a diester, triester or tetraester, more preferably a triester or tetraester, and more preferably a tetraester from the viewpoint of reducing the water retention value. More preferably, it is an ester.
  • the total number of carbon atoms of the fatty acid constituting the tetraester of pentaerythritol and fatty acid that is, the above formula In (1), the total number of carbon atoms of the R 1 C, R 2 C, R 3 C, and R 4 C moieties is preferably about 15 (when the total number of carbon atoms is 15, the IOB is 0.1. 60).
  • Examples of tetraesters of pentaerythritol and fatty acids include pentaerythritol, hexanoic acid (C 6 ), heptanoic acid (C 7 ), octanoic acid (C 8 ), such as 2-ethylhexanoic acid (C 8 ), nonane
  • Examples include tetraesters with acid (C 9 ), decanoic acid (C 10 ) and / or dodecanoic acid (C 12 ).
  • the triester of pentaerythritol and fatty acid is the total number of carbon atoms of the fatty acid constituting the triester of pentaerythritol and fatty acid, that is, the above formula In (2), the total number of carbon atoms in the R 1 C, R 2 C and R 3 C moieties is preferably about 19 or more (when the total number of carbon atoms is 19, IOB is 0.58). ).
  • the total number of carbon atoms of the fatty acid constituting the diester of pentaerythritol and fatty acid that is, the above formula (3 )
  • the total number of carbon atoms in the R 1 C and R 2 C moieties is preferably about 22 or more (when the total number of carbon atoms is 22, IOB is 0.59).
  • the carbon number of the fatty acid constituting the monoester of pentaerythritol and fatty acid that is, the above formula (4 )
  • the number of carbon atoms in the R 1 C moiety is preferably about 25 or more (when the number of carbon atoms is 25, IOB is 0.60).
  • the influence of double bond, triple bond, iso branch, and tert branch is not considered (the same applies hereinafter).
  • esters of pentaerythritol and fatty acids examples include Unistar H-408BRS, H-2408BRS-22 (mixed product), etc. (above, manufactured by NOF Corporation).
  • ester of (a 2 ) chain hydrocarbon triol and at least one fatty acid examples include the following formula (5): Triester of glycerin and fatty acid of the following formula (6): Diesters of glycerin and fatty acids and the following formula (7): (Wherein R 5 to R 7 are each a chain hydrocarbon) And monoesters of glycerin and fatty acids.
  • esters of glycerin and fatty acids satisfy the requirements of kinematic viscosity, water retention and weight average molecular weight. If there is, there is no particular limitation, for example, fatty acids listed in “esters of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid”, that is, saturated fatty acids and unsaturated fatty acids, oxidation, etc. In view of the possibility of modification by the above, it is preferably an ester of glycerin and a fatty acid derived from a saturated fatty acid, that is, an ester of glycerin and a saturated fatty acid.
  • ester of glycerin and fatty acid is preferably a diester or triester, more preferably a triester, from the viewpoint of reducing the water retention value.
  • Triesters of glycerin and fatty acids are also called triglycerides, for example, triesters of glycerin and octanoic acid (C 8 ), triesters of glycerin and decanoic acid (C 10 ), glycerin and dodecanoic acid (C 12 ). And triesters of glycerin with 2 or 3 fatty acids, and mixtures thereof.
  • Examples of triesters of glycerin and two or more fatty acids include triesters of glycerin and octanoic acid (C 8 ) and decanoic acid (C 10 ), glycerin, octanoic acid (C 8 ), and decanoic acid.
  • the triester of glycerin and a fatty acid is the total number of carbon atoms of the fatty acid constituting the triester of glycerin and a fatty acid, that is, in formula (5), R 5 C , R 6 C and R 7 C moieties preferably have a total carbon number of about 40 or less.
  • the triester of glycerin and fatty acid is the total number of carbon atoms of the fatty acid constituting the triester of glycerin and fatty acid, that is, the formula (5)
  • the total number of carbon atoms of the R 5 C, R 6 C and R 7 C moieties is preferably about 12 or more (when the total number of carbon atoms is 12, IOB is 0.60).
  • a triester of glycerin and a fatty acid is a so-called fat and is a component that can constitute a human body, and thus is preferable from the viewpoint of safety.
  • triesters of glycerin and fatty acid include tricoconut oil fatty acid glyceride, NA36, panacet 800, panacet 800B and panacet 810S, and tri-C2L oil fatty acid glyceride and tri-CL oil fatty acid glyceride (manufactured by NOF Corporation). Etc.
  • Diesters of glycerin and fatty acids are also called diglycerides, for example, diesters of glycerin and decanoic acid (C 10 ), diesters of glycerin and dodecanoic acid (C 12 ), diesters of glycerin and hexadecanoic acid (C 16 ). And diesters of glycerin and two fatty acids, and mixtures thereof.
  • the total number of carbon atoms of the fatty acid constituting the diester of glycerin and fatty acid that is, in the formula (6), the total number of carbon atoms in the R 5 C and R 6 C moieties is preferably about 16 or more (when the total number of carbon atoms is 16, IOB is 0.58).
  • Monoesters of glycerin and fatty acids are also referred to as monoglycerides, and examples include glycerin octadecanoic acid (C 18 ) monoester, glycerin docosanoic acid (C 22 ) monoester, and the like.
  • the number of carbon atoms of the fatty acid constituting the monoester of glycerin and fatty acid that is, in the formula (7), the number of carbon atoms in the R 5 C moiety is preferably about 19 or more (when the number of carbon atoms is 19, IOB is 0.59).
  • esters of chain hydrocarbon diols with at least one fatty acid include C 2 to C 6 chain hydrocarbon diols such as C 2 to C 6 glycols such as ethylene glycol, propylene glycol, and butylene glycol. , Monoester or diester of pentylene glycol or hexylene glycol and a fatty acid.
  • R 8 COOC k H 2k OCOR 9 (Wherein k is an integer from 2 to 6 and R 8 and R 9 are each a chain hydrocarbon)
  • R 8 COOC k H 2k OH (9) (Wherein k is an integer from 2 to 6 and R 8 is a chain hydrocarbon)
  • monoesters of C 2 -C 6 glycols and fatty acids for example, the following formula (8): R 8 COOC k H 2k OCOR 9 (8) (Wherein k is an integer from 2 to 6 and R 8 and R 9 are each a chain hydrocarbon)
  • R 8 COOC k H 2k OH (Wherein k is an integer from 2 to 6 and R 8 is a chain hydrocarbon)
  • monoesters of C 2 -C 6 glycols and fatty acids for example, the following formula (8): R 8 COOC k H 2k OCOR 9 (8) (Wherein k is an integer from 2 to 6 and R 8 and R 9 are each a chain hydrocarbon)
  • the fatty acid to be esterified is C 2 -C 6 glycol and
  • the ester with a fatty acid is not particularly limited as long as it satisfies the requirements of kinematic viscosity, water retention and weight average molecular weight.
  • “(a 1 ) a chain hydrocarbon tetraol and at least one fatty acid
  • the carbon number of the R 8 C and R 9 C moieties Is preferably about 6 or more (when the total number of carbon atoms is 6, IOB is 0.60).
  • the carbon number of the R 8 C moiety is about It is preferably 12 or more (when the carbon number is 12, IOB is 0.57).
  • esters of C 2 ⁇ C 6 glycols and fatty acid in view of the potential for degradation by oxidation and the like, derived from saturated fatty acids, esters of C 2 ⁇ C 6 glycols and fatty acid, Nachi Suwa, C 2 ⁇ An ester of C 6 glycol and a saturated fatty acid is preferred.
  • an ester of C 2 -C 6 glycol and a fatty acid from the viewpoint of reducing the water retention value, an ester of glycol and a fatty acid derived from a glycol having a large number of carbon atoms, such as butylene glycol and pentylene.
  • An ester of glycol and fatty acid derived from glycol or hexylene glycol is preferable.
  • the ester of C 2 -C 6 glycol and a fatty acid is preferably a diester from the viewpoint of reducing the water retention value.
  • Examples of commercially available esters of C 2 -C 6 glycol and fatty acid include Compol BL and Compol BS (manufactured by NOF Corporation).
  • compound (B1) As a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety (hereinafter sometimes referred to as “compound (B1)”), What is enumerated as a compound (A1) in "Compound (A)", for example, a pentaerythritol, glycerol, and glycol are mentioned.
  • Examples of the compound (B2) having a chain hydrocarbon moiety and one hydroxyl group substituting a hydrogen atom of the chain hydrocarbon moiety include: A compound in which one hydrogen atom of a hydrocarbon is substituted with one hydroxyl group (—OH), for example, an aliphatic monohydric alcohol, for example, a saturated aliphatic monohydric alcohol and an unsaturated aliphatic monohydric alcohol Can be mentioned.
  • —OH hydroxyl group
  • saturated aliphatic monohydric alcohol examples include C 1 to C 20 saturated aliphatic monohydric alcohols such as methyl alcohol (C 1 ) (C 1 represents the number of carbon atoms, the same shall apply hereinafter), ethyl alcohol (C 2 ), propyl alcohol (C 3 ) and isomers thereof such as isopropyl alcohol (C 3 ), butyl alcohol (C 4 ) and isomers thereof such as sec-butyl alcohol (C 4 ) and tert-butyl alcohol ( C 4 ), pentyl alcohol (C 5 ), hexyl alcohol (C 6 ), heptyl alcohol (C 7 ), octyl alcohol (C 8 ) and isomers thereof such as 2-ethylhexyl alcohol (C 8 ), nonyl alcohol ( C 9), decyl alcohol (C 10), dodecyl alcohol (C 12), tetradecyl alcohol (C 14), hexyl Decyl alcohol (C 16),
  • Examples of the unsaturated aliphatic monohydric alcohol include those obtained by substituting one of the C—C single bonds of the saturated aliphatic monohydric alcohol with a C ⁇ C double bond, such as oleyl alcohol. It is commercially available from Rika Co., Ltd. under the names of the Jamaica Coal series and the Angelo All series.
  • Examples of the compound (B) include (b 1 ) ethers of chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol, such as monoether, diether, triether and tetraether, preferably diether, triether.
  • Ethers and tetraethers more preferably triethers and tetraethers, and even more preferably tetraethers, ethers of (b 2 ) chain hydrocarbon triols and at least one aliphatic monohydric alcohol, such as monoethers, diethers and Triethers, preferably diethers and triethers, and more preferably triethers, and (b 3 ) ethers of chain hydrocarbon diols with at least one aliphatic monohydric alcohol, such as monoethers and diethers, and preferably Diether It is below.
  • ethers of chain hydrocarbon tetraols and at least one aliphatic monohydric alcohol include, for example, the following formulas (10) to (13): (In the formula, R 10 to R 13 are each a chain hydrocarbon.) And tetraethers, triethers, diethers and monoethers of pentaerythritol and aliphatic monohydric alcohols.
  • ethers of chain hydrocarbon triols and at least one aliphatic monohydric alcohol include, for example, the following formulas (14) to (16): (Wherein R 14 to R 16 are each a chain hydrocarbon.) And triether, diether and monoether of glycerin and aliphatic monohydric alcohol.
  • R 17 OC n H 2n OR 18 (Wherein n is an integer from 2 to 6 and R 17 and R 18 are each a chain hydrocarbon)
  • R 17 OC n H 2n OH (18)
  • n is an integer from 2 to 6 and R 17 is a chain hydrocarbon
  • monoethers of C 2 -C 6 glycols and aliphatic monohydric alcohols
  • the tetraether of pentaerythritol and aliphatic monohydric alcohol is aliphatic 1 constituting the tetraether of pentaerythritol and aliphatic monohydric alcohol.
  • the total number of carbon atoms of the hydric alcohol that is, in the above formula (10), the total number of carbon atoms of the R 10 , R 11 , R 12 and R 13 moieties is preferably about 4 or more (the total number of carbon atoms is In the case of 4, the IOB is 0.44).
  • the triether of pentaerythritol and aliphatic monohydric alcohol is aliphatic 1 constituting the triether of pentaerythritol and aliphatic monohydric alcohol.
  • the total number of carbon atoms of the monohydric alcohol that is, in the above formula (11), the total number of carbon atoms of the R 10 , R 11 and R 12 portions is preferably about 9 or more (when the total number of carbon atoms is 9 IOB becomes 0.57).
  • the diether of pentaerythritol and an aliphatic monohydric alcohol is an aliphatic monohydric alcohol constituting a diether of pentaerythritol and an aliphatic monohydric alcohol. That is, in the above formula (12), the total number of carbon atoms in the R 10 and R 11 moieties is preferably about 15 or more (when the total number of carbon atoms is 15, the IOB is 0). .60).
  • the monoether of pentaerythritol and aliphatic monohydric alcohol is aliphatic 1 constituting the monoether of pentaerythritol and aliphatic monohydric alcohol.
  • the number of carbon atoms of the polyhydric alcohol, i.e., in formula (13), the number of carbon atoms of R 10 moiety is preferably about 22 or more (when the number of carbon atoms is 22, IOB is 0.59).
  • the triether of glycerin and aliphatic monohydric alcohol is aliphatic 1 constituting the triether of glycerin and aliphatic monohydric alcohol.
  • the total number of carbon atoms of the R 14 , R 15 and R 16 moieties is preferably about 3 or more (when the total number of carbon atoms is 3). , IOB becomes 0.50).
  • diether of glycerol and aliphatic monohydric alcohol is carbon of aliphatic monohydric alcohol constituting diether of glycerin and aliphatic monohydric alcohol.
  • the total number of carbon atoms in the R 14 and R 15 moieties is preferably about 9 or more (when the total number of carbon atoms is 9, the IOB is 0.58). Clearly).
  • the monoether of glycerin and an aliphatic monohydric alcohol is an aliphatic monohydric alcohol constituting a monoether of glycerin and an aliphatic monohydric alcohol.
  • the carbon number of the R 14 moiety is preferably about 16 or more (when the carbon number is 16, IOB is 0.58).
  • R 17 and R 18 moieties
  • the total number of carbons is preferably about 2 or more (when the total number of carbons is 2, IOB is 0.33).
  • the R 17 moieties The number of carbon atoms is preferably about 8 or more (when the number of carbon atoms is 8, IOB is 0.60).
  • Compound (B) can be produced by dehydrating condensation of compound (B1) and compound (B2) in the presence of an acid catalyst.
  • (C1) Carboxylic acid, hydroxy acid, alkoxy acid or oxo acid (hereinafter referred to as “compound (C1) containing a chain hydrocarbon moiety and 2 to 4 carboxyl groups that replace the hydrogen atom of the chain hydrocarbon moiety”
  • a chain hydrocarbon carboxylic acid having 2 to 4 carboxyl groups such as a chain hydrocarbon dicarboxylic acid such as an alkanedicarboxylic acid such as ethanedioic acid, Propanedioic acid, butanedioic acid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, nonanedioic acid and decanedioic acid, chain hydrocarbon tricarboxylic acid such as alkanetricarboxylic acid such as propanetriacid , Butanetriacid, pentanetriacid, hexane
  • the compound (C1) includes a chain hydrocarbon hydroxy acid having 2 to 4 carboxyl groups, for example, a chain chain having 2 to 4 carboxyl groups such as malic acid, tartaric acid, citric acid, isocitric acid and the like. Hydrocarbon alkoxy acids such as O-acetylcitric acid and chain hydrocarbon oxoacids having 2 to 4 carboxyl groups are included.
  • C2 Examples of the compound having a chain hydrocarbon moiety and one hydroxyl group substituting a hydrogen atom of the chain hydrocarbon moiety include those listed in the section of “Compound (B)”, for example, fat Group monohydric alcohols.
  • compound (D) includes (d 1 ) aliphatic 1 And ethers of monohydric alcohols and aliphatic monohydric alcohols, (d 2 ) dialkyl ketones, (d 3 ) esters of fatty acids and aliphatic monohydric alcohols, and (d 4 ) dialkyl carbonates.
  • the ether As the aliphatic monohydric alcohol constituting the ether (corresponding to R 19 OH and R 20 OH in the formula (19)), the ether satisfies the above-mentioned requirements for kinematic viscosity, water retention and weight average molecular weight. If it is, it will not restrict
  • dialkylketone As the dialkyl ketone, the following formula (20): R 21 COR 22 (20) (Wherein R 21 and R 22 are each an alkyl group) The compound which has is mentioned.
  • the dialkyl ketone can be obtained by a known method, for example, by oxidizing a secondary alcohol with chromic acid or the like.
  • ester of a fatty acid and an aliphatic monohydric alcohol examples include the following formula (21): R 23 COOR 24 (21) (Wherein R 23 and R 24 are each a chain hydrocarbon) The compound which has is mentioned.
  • Examples of the fatty acid constituting the ester include, for example, the fatty acids listed in “(a 1 ) ester of chain hydrocarbon tetraol and fatty acid”, that is, Saturated fatty acids or unsaturated fatty acids are exemplified, and saturated fatty acids are preferred in consideration of the possibility of modification by oxidation or the like.
  • Examples of the aliphatic monohydric alcohol constituting the ester include the aliphatic monohydric alcohols listed in the section “Compound (B)”.
  • esters of fatty acids and aliphatic monohydric alcohols include, for example, dodecanoic acid (C 12 ), dodecyl alcohol (C 12 ) ester, tetradecanoic acid (C 14 ), dodecyl alcohol (C 12 ) and Examples of commercially available esters of fatty acids and aliphatic monohydric alcohols include Electol WE20 and Electol WE40 (manufactured by NOF Corporation).
  • the dialkyl carbonate is commercially available, and can be synthesized by a reaction of phosgene with an alcohol, a reaction of a formic chloride ester with an alcohol or an alcoholate, and a reaction of silver carbonate with an alkyl iodide.
  • (d 1 ) an ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol, (d 2 ) a dialkyl ketone, (d 3 ) a fatty acid and an aliphatic monohydric alcohol And (d 4 ) dialkyl carbonates preferably have a weight average molecular weight of about 100 or more, and more preferably about 200 or more.
  • dialkyl ketone when the total number of carbon atoms is about 8, for example, for 5-nonanone, the melting point is about ⁇ 50 ° C., and the vapor pressure is about 230 Pa at 20 ° C.
  • (E) Polyoxy C 3 -C 6 alkylene glycol, or alkyl ester or alkyl ether thereof includes (e 1 ) polyoxy C 3 -C 6 alkylene glycol, (e 2 ) Esters of polyoxy C 3 -C 6 alkylene glycol and at least one fatty acid, (e 3 ) Ethers of polyoxy C 3 -C 6 alkylene glycol and at least one aliphatic monohydric alcohol. This will be described below.
  • the polyoxy C 3 -C 6 alkylene glycol has the following formula (23): HO- (C m H 2m O) n -H (23) (Where m is an integer from 3 to 6) Is represented by
  • Examples of commercially available poly C 3 -C 6 alkylene glycols include Uniol (trademark) PB-500 and PB-700 (manufactured by NOF Corporation).
  • ester of polyoxy C 3 -C 6 alkylene glycol and at least one fatty acid examples include the OH terminal of the polyoxy C 3 -C 6 alkylene glycol described in the section “(e 1 ) Polyoxy C 3 -C 6 alkylene glycol”.
  • One or both are esterified with fatty acids, ie monoesters and diesters.
  • fatty acid to be esterified in the ester of polyoxy C 3 -C 6 alkylene glycol and at least one fatty acid are listed in “Ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid”.
  • Fatty acid that is, saturated fatty acid or unsaturated fatty acid, and saturated fatty acid is preferable in consideration of possibility of modification by oxidation or the like.
  • Examples of the aliphatic monohydric alcohol to be etherified in the ether of polyoxy C 3 -C 6 alkylene glycol and at least one aliphatic monohydric alcohol include, for example, the aliphatic enumerated in the section of “Compound (B)”. A monohydric alcohol is mentioned.
  • chain hydrocarbon examples include (f 1 ) chain alkanes such as straight chain alkanes and branched chain alkanes.
  • the linear alkane has a carbon number of about 22 or less when the melting point is about 45 ° C. or less, and about 13 or less when the vapor pressure is about 0.01 Pa or less at 1 atm and 25 ° C. That's it.
  • Branched-chain alkanes tend to have lower melting points at the same carbon number than straight-chain alkanes. Therefore, the branched chain alkane can include those having 22 or more carbon atoms even when the melting point is about 45 ° C. or lower.
  • the blood slipperiness-imparting agent may be applied alone to at least the convex portion 8 in the excretory opening contact region 20, or the blood slipperiness-imparting agent and at least one other component are contained.
  • a blood slipping agent-containing composition may be applied.
  • the blood slipping agent-containing composition will be described.
  • lubricity imparting agent about application of a blood slipperiness
  • the composition for containing a blood slipperiness agent contains the above-described blood slipperiness imparting agent and at least one other component.
  • the other components are not particularly limited as long as they do not inhibit the effect of the blood slipperiness-imparting agent, and those conventionally used in absorbent articles, particularly top sheets, can be used in the industry. .
  • Examples of other components include silicone oil, silicone, silicone resin, and the like.
  • antioxidants such as BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), propyl gallate and the like.
  • vitamins such as natural vitamins and synthetic vitamins.
  • vitamins include water-soluble vitamins such as vitamin B groups, such as vitamin B 1 , vitamin B 2 , vitamin B 3 , vitamin B 5 , vitamin B 6 , vitamin B 7 , vitamin B 9 , vitamin B 12, etc.
  • vitamin C examples include water-soluble vitamins such as vitamin B groups, such as vitamin B 1 , vitamin B 2 , vitamin B 3 , vitamin B 5 , vitamin B 6 , vitamin B 7 , vitamin B 9 , vitamin B 12, etc.
  • vitamin C such as water-soluble vitamins such as vitamin B groups, such as vitamin B 1 , vitamin B 2 , vitamin B 3 , vitamin B 5 , vitamin B 6 , vitamin B 7 , vitamin B 9 , vitamin B 12, etc.
  • vitamins examples include fat-soluble vitamins such as vitamin A group, vitamin D group, vitamin E group, and vitamin K group. Vitamins also include their derivatives.
  • Examples of other components include amino acids such as alanine, arginine, lysine, histidine, proline, hydroxyproline, and peptides.
  • zeolites such as natural zeolites such as zeolitic, chabazite, pyroxenite, natrolite, zeolitic and somosonite, and synthetic zeolite.
  • Examples of other components include cholesterol, hyaluronic acid, lecithin, ceramide and the like.
  • Other components include, for example, drugs such as skin astringents, anti-acne agents, anti-wrinkle agents, anti-cellulite agents, whitening agents, antibacterial agents, anti-fungal agents and the like.
  • Examples of the skin astringent include oil-soluble skin astringents such as zinc oxide, aluminum sulfate, and tannic acid, such as oil-soluble polyphenols.
  • oil-soluble polyphenols include natural oil-soluble polyphenols, such as buckwheat extract, hypericum extract, nettle extract, chamomile extract, burdock extract, salvia extract, linden extract, scallop extract, birch extract, cedar extract, sage extract, salvia extract, Examples include teuchigurumi extract, hibiscus extract, loquat leaf extract, bodaiju extract, hop extract, marronnier extract, and yokuinin extract.
  • anti-acne agent examples include salicylic acid, benzoyl peroxide, resorcinol, sulfur, erythromycin, and zinc.
  • anti-wrinkle agent examples include lactic acid, salicylic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid, and lysophosphatide acid.
  • anti-cellulite agent examples include xanthine compounds such as aminophylline, caffeine, theophylline, theobromine and the like.
  • whitening agents include niacinamide, kojic acid, arbutin, glucosamine and derivatives, phytosterol derivatives, ascorbic acid and derivatives thereof, and mulberry extract and placenta extract.
  • Examples of other components include anti-inflammatory components, pH adjusters, antibacterial agents, moisturizers, fragrances, pigments, dyes, pigments, plant extracts and the like.
  • Anti-inflammatory components include, for example, naturally-occurring anti-inflammatory agents such as buttons, ogon, hypericum, chamomile, licorice, momonoha, mugwort, perilla extract, synthetic anti-inflammatory agents such as allantoin, dipotassium glycyrrhizinate, etc. .
  • Examples of the pH adjuster include those for keeping the skin weakly acidic, such as malic acid, succinic acid, citric acid, tartaric acid, and lactic acid.
  • Examples of the pigment include titanium oxide.
  • the blood slipping agent-containing composition preferably contains about 50 to about 99% by weight and about 1 to about 50% by weight, more preferably about 60%, of the blood slipping agent and at least one other component, respectively. To about 99% and about 1 to about 40%, more preferably about 70 to about 99% and about 1 to about 30%, even more preferably about 80 to about 99% and about 1 to about 20%. % By weight, even more preferably from about 90 to 99% by weight and from about 1 to about 10% by weight, even more preferably from about 95 to 99% by weight and from about 1 to about 5% by weight. This is from the viewpoint of the effect of the blood slipperiness-imparting agent and other components.
  • the blood slipping agent-containing composition preferably contains a surfactant in an amount equal to or less than the amount derived from the hydrophilic treatment of the top sheet or the second sheet. More specifically, the composition containing a blood slipperiness agent preferably contains a surfactant, preferably about 0.0 to about 1.0 g / m 2 , more preferably about 0.0 to about 0.8 g / m 2. 2 , more preferably from about 0.1 to about 0.5 g / m 2 , and even more preferably from about 0.1 to about 0.3 g / m 2 in the basis weight range.
  • a surfactant preferably about 0.0 to about 1.0 g / m 2 , more preferably about 0.0 to about 0.8 g / m 2. 2 , more preferably from about 0.1 to about 0.5 g / m 2 , and even more preferably from about 0.1 to about 0.3 g / m 2 in the basis weight range.
  • the blood slipping agent-containing composition preferably contains water in an amount of about 0.0 to about 1.0 g / m 2 , more preferably about 0.0 to about 0.8 g / m 2 , and even more preferably about 0.0. It is included in the basis weight range of 1 to about 0.5 g / m 2 , even more preferably about 0.1 to about 0.3 g / m 2 . Since water reduces the absorption performance of an absorbent article, it is preferable that water is small.
  • the blood slipping agent-containing composition like the blood slipping agent, preferably has a kinematic viscosity at 40 ° C. of about 0 to about 80 mm 2 / s, and about 1 to about 70 mm 2. More preferably, it has a kinematic viscosity of about 3 to about 60 mm 2 / s, even more preferably about 5 to about 50 mm 2 / s, and even more preferably about Even more preferably, it has a kinematic viscosity of from 7 to about 45 mm 2 / s.
  • the kinematic viscosity of the composition containing a blood slipperiness agent exceeds about 80 mm 2 / s, the viscosity is high, and the blood slipperiness imparting composition is an absorbent article together with menstrual blood that has reached the skin contact surface of the top sheet. This is because it tends to be difficult to slide down inside.
  • the other component preferably has a weight average molecular weight of less than about 1,000. More preferably having a weight average molecular weight of less than about 900. This is because when the weight average molecular weight is about 1,000 or more, the blood slipperiness-imparting agent-containing composition itself is tacky and tends to give the wearer discomfort. Moreover, since the viscosity of the composition containing a blood slipperiness-imparting agent tends to increase as the weight average molecular weight increases, the viscosity of the blood slipperiness-enhancing agent composition is lowered to a viscosity suitable for application by heating. As a result, the blood slipping agent may have to be diluted with a solvent.
  • the composition containing a blood slipperiness imparting agent has a water content of about 0.01 to about 4.0% by mass and a water content of about 0.02 to about 3.5% by mass as the composition. Preferably about 0.03 to about 3.0% by weight, more preferably about 0.04 to about 2.5% by weight, and more preferably about 0.03 to about 3.0% by weight. More preferably, it has a water retention of 0.05 to about 2.0% by weight.
  • the affinity between the blood slipperiness-imparting agent composition and menstrual blood is reduced, and menstrual blood that has reached the skin contact surface of the top sheet is less likely to slide into the absorbent article.
  • lubricity imparting agent containing composition contains a solid substance, it is preferable to remove them by filtration in the measurement of kinematic viscosity and a water retention.

Abstract

　La présente invention concerne un article absorbant à mouvement amélioré du liquide d'une feuille supérieure vers un élément absorbant.　Dans un article absorbant (1) selon la présente invention, une feuille supérieure (2) se présente sous forme de tissu non-tissé comprenant des zones à haute densité de fibres (21) et des zones à faible densité de fibres (22). Un élément absorbant (4) comprend un noyau absorbant (41), une feuille de couverture (42) située du côté de la feuille supérieure, une feuille de couverture (43) située du côté de la feuille arrière, et des évidements de compression (45) obtenus par compression de la feuille de couverture (43) située du côté de la feuille arrière dans la direction de la partie centrale absorbante (41). Les évidements de compression (45) comportent des évidements (452) obtenus par faible compression formés selon un motif maillé, et des évidements (451) obtenus par forte compression formés de manière à être dispersés dans le motif maillé. Lorsque les zones à faible densité de fibres (22) et les évidements (452) obtenus par faible compression sont projetés dans un plan imaginaire (P) perpendiculaire à la direction de l'épaisseur (Z), des zones de projection (R1) des zones à faible densité de fibres (22) présentent respectivement un chevauchement (L) avec des zones de projection (R2) des évidements (452) obtenus par faible compression.
PCT/JP2014/073686 2013-09-30 2014-09-08 Article absorbant WO2014196670A1 (fr)

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JP2013-205986 2013-09-30
JP2013205986A JP6195770B2 (ja) 2013-09-30 2013-09-30 吸収性物品

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WO2014196670A1 true WO2014196670A1 (fr) 2014-12-11

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EP3417840A4 (fr) * 2016-03-29 2019-04-17 Unicharm Corporation Article absorbant
US10583050B2 (en) * 2014-11-06 2020-03-10 The Procter & Gamble Company Patterned apertured webs and methods for making the same

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CN106176059B (zh) * 2016-08-05 2020-03-17 黄山富田精工制造有限公司 一种复合芯体及其制造方法
JP6760038B2 (ja) * 2016-12-16 2020-09-23 王子ホールディングス株式会社 吸収性物品及び吸収性物品の製造方法
JP6819271B2 (ja) * 2016-12-16 2021-01-27 王子ホールディングス株式会社 吸収性物品及び吸収性物品の製造方法
JP6473492B2 (ja) * 2016-12-27 2019-02-20 花王株式会社 吸収性物品
JP7315375B2 (ja) * 2019-05-22 2023-07-26 花王株式会社 吸収性物品
JP6942771B2 (ja) * 2019-09-27 2021-09-29 大王製紙株式会社 吸収性物品
WO2021107059A1 (fr) * 2019-11-26 2021-06-03 ユニ・チャーム株式会社 Article absorbant
CN114099145B (zh) * 2020-08-31 2022-09-16 王子控股株式会社 吸收性物品的制造方法及吸收性物品的制造装置

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