WO2014054649A1 - Article absorbant - Google Patents

Article absorbant Download PDF

Info

Publication number
WO2014054649A1
WO2014054649A1 PCT/JP2013/076727 JP2013076727W WO2014054649A1 WO 2014054649 A1 WO2014054649 A1 WO 2014054649A1 JP 2013076727 W JP2013076727 W JP 2013076727W WO 2014054649 A1 WO2014054649 A1 WO 2014054649A1
Authority
WO
WIPO (PCT)
Prior art keywords
acid
chain hydrocarbon
fiber
hydrocarbon moiety
top sheet
Prior art date
Application number
PCT/JP2013/076727
Other languages
English (en)
Japanese (ja)
Inventor
匡志 宇田
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 CN201380062904.0A priority Critical patent/CN104822349B/zh
Publication of WO2014054649A1 publication Critical patent/WO2014054649A1/fr

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15804—Plant, e.g. involving several steps
    • 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
    • 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
    • A61F13/51113—Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control

Definitions

  • the present invention relates to an absorbent article.
  • Patent Documents 1 to 4 As a top sheet of an absorbent article, a non-woven fabric having an uneven surface and a method for producing the same are known (Patent Documents 1 to 4).
  • an object of this invention is to provide the absorbent article which has the improved menstrual blood transfer property from a top sheet to an absorber, and can reduce the menstrual blood remaining on a top sheet.
  • the present invention provides a liquid-permeable top sheet having a skin contact surface, a liquid-impermeable back sheet having a non-skin contact surface, the top sheet, and the back sheet.
  • An absorbent article comprising an absorbent body provided therebetween, wherein the top sheet intersects the first direction and the first direction at least in the excretory opening contact region of the skin contact surface.
  • the absorbent article is provided with a blood slipperiness imparting agent having a mass% and a weight average molecular weight of less than 1,000.
  • an absorbent article that has improved menstrual blood transfer from the top sheet to the absorbent body and can reduce menstrual blood remaining on the top sheet.
  • FIG. 1 is a partially broken plan view of a sanitary napkin according to an embodiment of the absorbent article of the present invention.
  • 2 is a cross-sectional view taken along line AA in FIG.
  • FIG. 3 is a partial perspective view of a top sheet provided in the sanitary napkin shown in FIG. 1.
  • 4A is a partially enlarged cross-sectional view of the top sheet shown in FIG. 3
  • FIG. 4B is a diagram showing fiber orientations at the top of the convex portion and the bottom of the concave portion shown in FIG. 4A.
  • FIG. 4C is a development view of the convex side wall and the concave side wall shown in FIG.
  • FIG. 5 is a diagram illustrating a manufacturing process of the top sheet shown in FIG. FIG.
  • FIG. 6 is a diagram for explaining a manufacturing process of the sanitary napkin shown in FIG.
  • FIG. 7 is an electron micrograph of the skin contact surface of the top sheet in a sanitary napkin in which the top sheet contains tri-C2L oil fatty acid glycerides.
  • FIG. 8 is a photomicrograph of menstrual blood with or without a blood slipping agent.
  • FIG. 9 is a diagram for explaining a method of measuring the surface tension.
  • An absorbent article according to the present invention is provided between a liquid-permeable top sheet having a skin contact surface, a liquid-impermeable back sheet having a non-skin contact surface, and the top sheet and the back sheet.
  • An absorbent article comprising the absorbent body, wherein the top sheet has a first direction and a second direction intersecting the first direction at least in the excretory opening contact region of the skin contact surface.
  • a plurality of concave portions each having a bottom portion and a concave portion side wall portion extending from the bottom portion, and the convex side wall portion extending from the top portion. Having a fiber orientation along the direction, and the recess side wall portion is a fiber along its extending direction. It has a tropism, wherein at least the convex portion of the excretory opening contact region, kinematic viscosity at 40 ° C. of 0.01 to 80 mm 2 / s, water holding percentage of 0.01 to 4.0 mass%,
  • the absorbent article is coated with a blood slipperiness-imparting agent having a weight average molecular weight of less than 1,000.
  • the absorbent article according to the present invention when menstrual blood excreted from the wearer reaches the excretory opening contact region, it slides down together with the blood slipperiness-imparting agent present in the convex portion, passes through the top sheet, and becomes an absorbent body. Transition. Therefore, the absorbent article according to the present invention has improved menstrual blood transfer from the top sheet to the absorbent body, and can reduce menstrual blood remaining on the top sheet. For this reason, the sticky feeling of the skin contact surface of the top sheet is prevented, and the smooth feeling is 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). .
  • the convex side wall portion extends from the top of the convex portion toward the bottom of the concave portion, and the concave side wall portion starts from the bottom of the concave portion at the top of the convex portion. It extends towards. Therefore, the convex side wall portion has a fiber orientation along the extending direction, that is, the direction from the top of the convex portion toward the bottom of the concave portion, and the concave side wall portion is in the extending direction, that is, the concave portion. It has fiber orientation along the direction from the bottom toward the top of the convex portion.
  • menstrual blood excreted from the wearer easily slides along the extending direction of the convex side wall portion and the concave side wall portion together with the blood slipperiness imparting agent.
  • menstrual blood excreted from the wearer does not spread in the surface direction of the top sheet, but easily moves in the thickness direction of the top sheet (that is, to the absorber).
  • the convex side wall portion and the concave side wall portion have fiber orientation along each extending direction, and therefore the fiber orientation in the thickness direction of the top sheet is large, resulting from this.
  • the top sheet has high compression deformation and compression recovery properties (cushioning properties). Therefore, even if the absorbent article is compressed, liquid return (rewetting back) from the absorbent body hardly occurs. Moreover, since the cushioning property of a top sheet is high, it gives a wearer good comfort.
  • the skin contact surface of the top sheet has an uneven shape, the contact area between the wearer's skin and the top sheet is small, and the surface direction of the top sheet through the space in the recess is reduced. Good air permeability. Therefore, it is difficult to give the wearer stuffiness and itching.
  • the fiber density at the top of the convex portion is lower than the fiber density at the bottom of the concave portion. Since the liquid is likely to move from the lower fiber density (the top of the convex portion in aspect 1) to the higher (the bottom of the concave part in aspect 1), the absorbent article according to aspect 1 has the effect of the blood slipperiness-imparting agent. In combination with the above, it has improved menstrual transfer from the top sheet to the absorbent body.
  • the fiber density at the top of the convex portion is higher than the fiber density at the bottom of the concave portion.
  • the liquid is less likely to move from the higher fiber density (the top of the convex part in aspect 2) to the lower (the bottom of the concave part in aspect 2), but the absorbent article according to aspect 2 has the effect of the blood slipperiness-imparting agent. Therefore, it has the improved menstrual blood transfer property from a top sheet to an absorber. Therefore, the effect of the blood slipperiness-imparting agent is significant in the absorbent article according to aspect 2.
  • the convex side wall part and / or the concave side wall part have portions having different fiber orientations.
  • Aspect 3 can be combined with Aspect 1 or Aspect 2.
  • the fiber orientation in the thickness direction at the bottom of the recess is smaller than the fiber orientation in the thickness direction at the sidewall of the recess.
  • menstrual blood is easy to transfer to a thickness direction (namely, to an absorber), without accumulating in a recessed part side wall part.
  • the fiber orientation in a recessed part changes to the direction perpendicular
  • Aspect 4 can be combined with one of Aspects 1 to 3, or two or more aspects that can be arranged side by side.
  • the number of fiber fusion points at the top of the convex portion is smaller than the number of fiber fusion points at the bottom of the concave portion.
  • the touch of a top sheet is favorable.
  • Aspect 5 can be combined with one of aspects 1 to 4 or two or more aspects that can be arranged side by side.
  • the constituent fibers of the top sheet are heat-sealed.
  • corrugated shape of a top sheet is maintained by the heat sealing
  • Aspect 6 can be combined with one of aspects 1 to 5 or two or more aspects that can be arranged side by side.
  • the top sheet contains heat-extensible heat-extensible fibers. Due to the thermal elongation of the heat-extensible fibers, effective uneven shaping is possible. Moreover, the heat
  • the IOB of the blood slipperiness imparting agent is an IOB of 0.00 to 0.60.
  • Aspect 8 can be combined with one of Aspects 1 to 7, or two or more aspects that can be juxtaposed.
  • the blood slipperiness imparting agent includes 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) ).
  • Aspect 9 can be combined with one of aspects 1 to 8 or two or more aspects that can be arranged side by side.
  • the blood slipperiness imparting agent includes 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.
  • Aspect 10 can be combined with one of Aspects 1-9 or two or more aspects that can be juxtaposed.
  • the blood slipperiness imparting agent includes 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
  • Aspect 11 can be combined with one of Aspects 1 to 10 or two or more aspects that can be juxtaposed.
  • the blood slipperiness imparting agent is (a 1 ) an ester of a chain hydrocarbon tetraol and at least one fatty acid, (a 2 ) a chain carbonization.
  • An ester of hydrogen triol and at least one fatty acid (a 3 ) an ester of a chain hydrocarbon diol and at least one fatty acid, and (b 1 ) a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol.
  • the blood slipperiness imparting agent has a vapor pressure of 0.00 to 0.01 Pa at 1 atm and 40 ° C.
  • Aspect 13 can be combined with one of Aspects 1-12 or two or more aspects that can be juxtaposed.
  • the kind 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 and panty liners, and these may be used for humans and non-human animals such as pets.
  • the liquid to be absorbed by the absorbent article is not particularly limited, but is mainly liquid excrement such as menstrual blood.
  • an embodiment of the absorbent article of the present invention will be described based on the drawings, taking a sanitary napkin as an example.
  • a sanitary napkin 1 according to an embodiment of the absorbent article of the present invention includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and a top sheet 2. And an absorbent body 4 provided between the back sheets 3.
  • the X-axis direction corresponds to the width direction of the sanitary napkin 1
  • the Y-axis direction corresponds to the longitudinal direction of the sanitary napkin 1
  • the plane direction extending in the X-axis Y-axis direction corresponds to the plane direction of the sanitary napkin 1.
  • the sanitary napkin 1 is worn for the purpose of absorbing liquid excretion such as menstrual blood.
  • 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.
  • Liquid excreta such as menstrual blood 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 portion 6 can be adjusted as appropriate within a range suitable for the wearer's body, underwear, etc. Examples of the shape of the main body portion 6 include a substantially rectangular shape, a substantially oval shape, and a generally saddle shape. .
  • the total length in the longitudinal direction of the main body 6 is usually 100 to 500 mm, preferably 150 to 350 mm.
  • the total length in the width direction 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 embossing, ultrasonic waves, hot-melt adhesives, and the like. In order to increase the bonding strength, two or more bonding modes may be combined (for example, embossing is performed after bonding with a hot-melt adhesive).
  • embossing for example, a method of embossing by passing the top sheet 2 and the back sheet 3 together between an embossing roll having a patterned convex portion and a flat roll (a method called a so-called round seal), etc. Is mentioned.
  • the emboss pattern include a lattice pattern, a staggered pattern, and a wavy pattern.
  • the hot melt adhesive for example, styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), or the like, or linear Pressure-sensitive adhesives or heat-sensitive adhesives mainly composed of olefins such as low density polyethylene; water-soluble polymers (for example, polyvinyl alcohol, carboxymethyl cellulose, gelatin, etc.) or water-swellable polymers (for example, polyvinyl acetate, poly And water sensitive adhesives such as sodium acrylate).
  • the method for applying the adhesive include spiral coating, coater coating, curtain coater coating, and summit gun coating.
  • 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 sheet through which liquid excretion such as menstrual blood can pass.
  • One surface (upper surface in FIG. 2) of the top sheet 2 is a skin contact surface with which the wearer's skin comes into contact, and the other surface (lower surface in FIG. 2) is an absorption on which the absorber 4 is disposed. It is a body placement surface.
  • the top sheet 2 examples include a non-woven fabric, a synthetic resin film in which liquid permeation holes are formed, and a laminate of a synthetic resin film and a non-woven fabric, and a non-woven fabric is preferable.
  • a nonwoven fabric an air through nonwoven fabric, a heat bond nonwoven fabric, a spun bond nonwoven fabric, a melt blown nonwoven fabric, a spunlace nonwoven fabric, a needle punch nonwoven fabric, etc. are mentioned, for example.
  • the top sheet 2 contains a heat-fusible fiber as a constituent fiber.
  • the constituent fibers of the top sheet 2 are heat-sealed by melting and solidifying the heat-fusible fibers, whereby the uneven shape of the top sheet 2 is maintained. Further, when the sanitary napkin 1 is used, it is difficult for fibers to fall out and fluff from the top sheet 2.
  • the heat-fusible fiber examples include a heat-fusible fiber made of a thermoplastic resin such as polyolefin, polyester, or polyamide.
  • a thermoplastic resin such as polyolefin, polyester, or polyamide.
  • the polyolefin 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), ethylene-propylene random copolymer (EP)), 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
  • Polyethylene particularly HDPE, is preferred because it has a relatively low softening point of around 100 ° C. and is excellent in heat workability, and has low rigidity and a supple feel.
  • the polyester 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. Since it has elastic resilience, it is possible to construct fibers and nonwoven fabrics having high cushioning properties, and PET is preferred from the economical point of being obtained industrially at a low cost.
  • the polyamide include 6-nylon and 6,6-nylon.
  • the fiber diameter of the heat-fusible fiber is usually 5 to 100 ⁇ m, preferably 10 to 40 ⁇ m, and the fineness of the heat-fusible fiber is usually 0.5 to 10 dtex, preferably 1 to 5 dtex.
  • the content of the conductive fiber is usually 10 to 100% by mass, preferably 50 to 100% by mass, based on the entire constituent fibers of the top sheet 2.
  • the top sheet 2 preferably contains a thermally stretchable fiber as a constituent fiber. Due to the thermal elongation of the heat-extensible fibers, effective uneven shaping is possible. Moreover, the heat
  • the heat-extensible fiber may be a fiber whose actual fiber length is elongated by heat treatment (for example, a fiber whose actual fiber length is elongated due to a change in the crystalline state of the resin). Fibers that do not elongate but have an apparent fiber length (for example, crimped fibers in which the apparent fiber length is elongated by releasing the crimps such as zigzag, ⁇ , and spiral) It may be.
  • the heat-extensible fibers include two types of resins having different melting points or softening points (resins having a relatively high melting point or softening point are called “high melting point resins”, and resins having a relatively low melting point are “low melting point resins”. And a two-component heat-extensible composite fiber in which a low melting point resin is continuously present in the length direction on at least a part of the fiber surface.
  • the high-melting point resin is a component that develops heat extensibility
  • the low melting point resin is a component that develops heat-fusibility
  • the heat-extensible composite fiber is heated at a temperature lower than the melting point of the high-melting point resin component. It is extensible.
  • the kind of the high melting point resin and the low melting point resin is not particularly limited as long as it has fiber forming ability.
  • the melting point difference or softening point difference between the high melting point resin and the low melting point resin is usually 20 ° C. or higher, preferably 25 ° C. or higher.
  • the melting point of the high melting point resin and the low melting point resin for example, the melting point measured by the following method is used. Using a differential scanning calorimeter (for example, DSC6200, manufactured by Seiko Instruments Inc.), a finely cut fiber sample (for example, 2 mg sample) was subjected to thermal analysis at a heating rate of 10 ° C./min to melt each resin. The peak temperature is measured and the measured melting peak temperature is defined as the melting point. When the melting point of the resin cannot be clearly measured by this method, the temperature at which the resin is fused to such an extent that the fiber fusing point strength can be measured as the temperature at which the molecular flow of the resin begins, is used as the softening point. Used for.
  • a differential scanning calorimeter for example, DSC6200, manufactured by Seiko Instruments Inc.
  • the orientation index of the high melting point resin and the low melting point resin can be appropriately adjusted depending on the type of the resin.
  • the orientation index is usually 60% or less, preferably 40% or less, and more preferably 25% or less.
  • polyester is used as the high melting point resin
  • the orientation index is usually 25% or less, preferably 20% or less, more preferably 10% or less.
  • the orientation index of the low melting point resin is usually 5% or more, preferably 15% or more, and more preferably 30% or more.
  • the orientation index of the high melting point resin and the low melting point resin is an index of the degree of orientation of the polymer chain of the resin constituting the fiber, and is calculated by the following formula.
  • Orientation index (%) X / Y ⁇ 100 [Wherein, X is the value of birefringence of the resin in the heat-extensible conjugate fiber, and Y is the value of intrinsic birefringence of the resin. ]
  • the birefringence (X in the above formula) of the resin in the heat-extensible composite fiber is measured, for example, with a polarizing plate attached to an interference microscope and polarized light in a direction parallel to and perpendicular to the fiber axis.
  • the immersion liquid for example, a standard refraction liquid manufactured by Cargille is used.
  • the refractive index of the immersion liquid is measured by, for example, an Abbe refractometer. From the interference fringe image of the composite fiber obtained by the interference microscope, a known method (for example, Journal of the Fiber Society, “Fiber structure formation in high-speed spinning of core-sheath type composite fiber”, Vol. 51, No. 9, No. 408). Page, 1995), the refractive index in the direction parallel and perpendicular to the fiber axis is obtained, and the birefringence which is the difference between the two is calculated.
  • the intrinsic birefringence of the resin (Y in the above formula) is the birefringence in a state where the polymer polymer chains are perfectly oriented, and the value is, for example, the first edition of “Plastic material in molding process”, and the attached surface molding process. It is described in typical plastic materials used (edited by the Japan Society for Plastic Processing), Sigma Publishing, published on February 10, 1998.
  • the thermal elongation rate of the heat-stretchable composite fiber at a temperature 10 ° C. higher than the melting point or softening point of the low-melting resin is preferably 0.5 to 20%, more preferably 3 to 20%, still more preferably 7.5 to 20%.
  • the thermal elongation rate for example, the thermal elongation rate measured by the following method is used.
  • a thermomechanical analyzer TMA-50 manufactured by Shimadzu Corp.
  • TMA-50 was mounted with parallel fibers arranged at a distance of 10 mm between chucks, and a constant load of 0.025 mN / tex was applied at a heating rate of 10 ° C./min. Raise the temperature.
  • the change in the elongation rate of the fiber at that time was measured, and the elongation rate at the melting point or softening point of the low melting point resin and the elongation rate at a temperature 10 ° C. higher than the melting point or softening point of the low melting point resin were read.
  • the thermal elongation rate for example, the thermal elongation rate measured by the following method is used.
  • a thermomechanical analyzer TMA-50 manufactured by Shimadzu Corp.
  • the reason why the thermal elongation rate is measured in the above temperature range is that, when the fiber intersection is heat-sealed, the temperature range is higher than the melting point or softening point of the low-melting resin and up to about 10 ° C. Is usually adopted.
  • the heat-extensible conjugate fiber can take the form of a core-sheath type (concentric type, eccentric type), a side-by-side type, or the like.
  • the sheath component and the core component can be composed of a low melting point resin and a high melting point resin, respectively.
  • the core component include polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and the like.
  • the sheath component when the core component is PP include polyethylene (PE) such as high density polyethylene (HDPE), low density polyethylene (LDPE), and linear low density polyethylene (LLDPE), and an ethylene propylene copolymer. , Polystyrene and the like.
  • the sheath component when the core component is PET, PBT, and the like include PP and copolymer polyester.
  • the ratio (weight ratio) of the low-melting point resin to the high-melting point resin in the heat-stretchable composite fiber can be appropriately adjusted in consideration of the heat-stretchability, heat-fusibility, mechanical properties, etc. of the fiber. 90 to 90:10, preferably 20:80 to 80:20, and more preferably 50:50 to 70:30.
  • the thickness of the heat-extensible composite fiber can be adjusted to, for example, 1.0 to 10 dtex (particularly 1.7 to 8.0 dtex).
  • the fiber length of the heat-extensible composite fiber is, for example, about 30 to 70 mm. Can be adjusted.
  • a heat-extensible conjugate fiber having a desired thermal elongation rate can be produced, for example, by subjecting a spun conjugate fiber to a heat treatment or a crimping treatment without performing a drawing treatment.
  • the conditions of the heat treatment applied to the composite fiber after spinning can be appropriately adjusted according to the types of the high melting point resin and the low melting point resin constituting the composite fiber.
  • the heating temperature is usually 50 to 120 ° C., preferably 70 to 100 ° C.
  • the heating time is usually 10 ° C. It is ⁇ 500 seconds, preferably 20 to 200 seconds.
  • the heating medium include hot air and infrared rays.
  • Examples of the crimping treatment performed on the spun composite fiber include mechanical crimping.
  • the crimp may be in either a two-dimensional or three-dimensional manner, or a three-dimensional manifested crimp seen in an eccentric core-sheath composite fiber, side-by-side composite fiber, or the like. It may be.
  • the mechanical crimping involves heat, the heating process and the crimping process are performed simultaneously.
  • the fiber may be slightly stretched in the crimping process, but such stretching is not included in the stretching process.
  • the drawing treatment usually means a drawing operation with a draw ratio of about 2 to 6 times performed on an undrawn yarn.
  • the top sheet 2 may contain fibers other than heat-fusible fibers and heat-extensible fibers.
  • fibers other than the heat-fusible fiber and the heat-extensible fiber include natural fibers (wool, cotton, etc.), regenerated fibers (rayon, acetate, etc.), inorganic fibers (glass fiber, carbon fiber, etc.), and the like.
  • the content of the other fibers can be appropriately adjusted, but is usually 95% by weight or less, preferably 80% by weight or less of the top sheet 2.
  • the skin contact surface of the top sheet 2 has a large number of convex portions 8 and concave portions 9, and the skin contact surface of the top sheet 2 has an uneven shape. . Since the skin contact surface of the top sheet 2 is uneven, the contact area between the wearer's skin and the top sheet 2 is small, and the air permeability in the surface direction of the top sheet 2 through the space in the recess 9 is good. is there. Therefore, it is difficult to give the wearer stuffiness and itching.
  • the convex portion 8 and the concave portion 9 are formed on substantially the entire absorber arrangement region including the excretory opening abutting region 20 in the skin contact surface of the top sheet 2. 9 should just be formed in the excretion opening
  • FIG. The absorber arrangement region is a region where the absorber 4 overlaps the top sheet 2 when the absorber 4 is projected onto the top sheet 2.
  • the excretion opening contact area 20 is an area where the wearer's excretion opening (for example, small labia, large labia, etc.) abuts when the sanitary napkin 1 is worn.
  • the excretory opening contact region 20 is a region surrounded by a dotted line in FIG. 1, and is set at substantially the center of the absorber arrangement region. The position, area, and the like of the excretion opening contact region 20 can be adjusted as appropriate.
  • the excretory opening contact area 20 may be set as an area substantially the same as the area where the excretion opening actually contacts, or may be set as a larger area, but liquid excrement such as menstrual blood From the viewpoint of preventing leakage to the outside, it is preferably set as a region larger than the region where the excretion port actually contacts.
  • the excretion opening contact region 20 has a length of usually 50 to 200 mm, preferably 70 to 150 mm, and a width of usually 10 to 80 mm, preferably 20 to 50 mm.
  • the excretory opening contact area 20 is set as a virtual area, but may be set as a visually recognizable area.
  • Visual recognition includes, for example, coloring of the excretory opening contact region 20 and formation of a recess (for example, a recess formed by a heat embossing process) extending continuously or intermittently along the periphery of the excretion opening contact region 20. Etc. are possible.
  • substantially the entire excretory opening contact region 20 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, and a weight average molecular weight.
  • the blood slipperiness imparting agent which is less than 1,000 is applied. Refer to the separate item for details of the blood slipperiness-imparting agent.
  • the blood slipperiness imparting agent is applied to substantially the entire excretory opening contact region 20, but the blood slipperiness imparting agent is at least the convex portion 8 (particularly convex in the excretion port contact region 20. It only has to be applied to the top 81) of the part 8.
  • the blood slipperiness imparting agent is applied to at least the convex portion 8 in the excretory opening contact region 20, it is applied to a portion other than the convex portion 8 (for example, the concave portion 9).
  • it may be applied to a region other than the excretion opening contact area 20 (for example, a peripheral area of the excretion opening contact area 20) on the skin contact surface.
  • the blood slipperiness-imparting agent can be applied to substantially the entire skin contact surface or substantially the entire absorber arrangement region.
  • the blood slipperiness imparting agent When the blood slipperiness imparting agent is applied to at least the convex portion 8 (particularly, the top portion 81 of the convex portion 8) in the excretory opening contact region 20, the following effects are exhibited.
  • menstrual blood excreted from the wearer reaches the excretory opening contact region 20, it slides down into the concave portion 9 together with the blood slipperiness imparting agent present in the convex portion 8, passes through the top sheet 2, and shifts to the absorber 4. . Therefore, the sanitary napkin 1 has improved menstrual blood transfer from the top sheet 2 to the absorbent body 4, and can reduce menstrual blood remaining on the top sheet 2. For this reason, the sticky feeling of the skin contact surface of the top sheet 2 is prevented, and a smooth feeling is 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). .
  • the convex side wall 82 extends from the top 81 of the convex 8 toward the bottom 91 of the concave portion 9, and the concave side wall 92 starts from the bottom 91 of the concave 9.
  • the convex side wall 82 has a fiber orientation along the extending direction, that is, the direction from the top 81 of the convex 8 toward the bottom 91 of the concave 9, and the concave side 92 is extended. It has fiber orientation along the direction, that is, the direction from the bottom 91 of the concave portion 9 to the top 81 of the convex portion 8.
  • menstrual blood excreted from the wearer easily slides along the extending direction of the convex side wall portion 82 and the concave side wall portion 92 together with the blood slipperiness imparting agent.
  • menstrual blood excreted from the wearer does not spread in the surface direction of the top sheet 2 and easily moves in the thickness direction of the top sheet 2 (that is, to the absorber 4).
  • lubricity imparting agent exhibits effectively. Is done.
  • the effect of the blood slipperiness imparting agent can be enhanced by applying the blood slipperiness imparting agent to the concave portion 9 in addition to the convex portion 8.
  • 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, by the following method.
  • (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).
  • the basis weight BBS (g / m 2 ) of the blood slipperiness-imparting agent is calculated based on the following formula.
  • BBS (g / m 2 ) [SM 0 (g) ⁇ SM 1 (g)] / SA (m 2 )
  • 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 convex part 8 has protruded to the skin contact surface side (upper side in FIG. 2) of the top sheet 2, and the recessed part 9 has the absorber arrangement
  • the convex portions 8 and the concave portions 9 are alternately arranged in the first direction and the second direction intersecting with the first direction.
  • the first direction is an arbitrary direction in the skin contact surface of the top sheet 2
  • the second direction is a direction that intersects the first direction in the skin contact surface of the top sheet 2.
  • the first direction is the X direction
  • the second direction is the Y direction
  • the angle at which the first direction and the second direction intersect is 90 °.
  • the first direction, the second direction, and the angle at which the first direction and the second direction intersect are not limited to the present embodiment, and can be changed as appropriate.
  • the angle at which the first direction and the second direction intersect is preferably 30 to 90 °.
  • the convex portions 8 and the concave portions 9 are alternately arranged in the X direction and the Y direction to form a row, and adjacent convex portions in the rows in the X direction and the Y direction.
  • the recesses 9 are positioned between the eight recesses 8 (that is, four recesses 9 are positioned around one protrusion 8).
  • the convex portions 8 are arranged so as to be shifted by a half pitch, so that when the top sheet 2 is viewed in plan, the arrangement pattern of the convex portions 8 is a staggered pattern.
  • the concave portions 9 are arranged so as to be shifted by a half pitch, so that when the top sheet 2 is viewed in plan, the arrangement pattern of the concave portions 9 is a staggered pattern.
  • the arrangement pattern of the convex part 8 and the recessed part 9 is not limited to this embodiment, It can change suitably.
  • the number of concave portions 9 positioned around one convex portion 8 and the number of convex portions 8 positioned around one concave portion 9 can be appropriately selected.
  • the height of the convex portion 8 is usually 0.2 to 15 mm, preferably 0.5 to 5 mm, the width (X direction) is usually 1 to 20 mm, preferably 2 to 10 mm, and the length (Y direction). ) Is usually 1 to 20 mm, preferably 2 to 10 mm, and the interval between the convex portions 8 (width or length of the concave portion 9) is usually 1 to 20 mm, preferably 2 to 10 mm.
  • the convex part 8 has a top part 81 and a convex part side wall part 82 extending from the top part 81, and the concave part 9 is a bottom part 91 and a concave part side wall part 92 extending from the bottom part 91. And have.
  • the external shape of the convex portion 8 and the concave portion 9 is hemispherical, the cross-sectional view shape is arched, and the planar view shape is circular.
  • the external shape of the convex part 8 is a shape when the convex part 8 is seen from the skin contact surface of the top sheet 2
  • the external shape of the concave part 9 is the concave part 9 from the absorber arrangement surface of the top sheet 2. It is the shape when seen.
  • the shape of the convex part 8 and the recessed part 9 is not limited to this embodiment, It can change into another shape. Examples of other external shapes include cone shapes such as a cone, a truncated cone, a pyramid, a truncated pyramid, and an oblique cone. Examples of other planar shapes include an elliptical shape, a rectangular shape, and a polygonal shape. Can be mentioned.
  • the inside of the convex part 8 is hollow.
  • a ridge-shaped connecting portion may be formed between the adjacent convex portions 8 and between the adjacent concave portions 9.
  • the internal spaces of the adjacent convex portions 8 may or may not communicate with each other through this connecting portion.
  • the convex portion side wall portion 82 When the skin contact surface side of the top sheet 2 is set to the upper side and the absorber arrangement surface side is set to the lower side, the convex portion side wall portion 82 has a tapered shape whose diameter gradually increases downward. Has a tapered shape with a diameter gradually increasing upward.
  • the convex side wall portion 82 extends downward from the top portion 81, and the lower end portion thereof is continuous with the upper end portion of the concave side wall portion 92 extending upward from the bottom portion 91. That is, the convex side wall 82 extends in the direction from the top 81 to the bottom 91, and the concave side wall 92 extends in the direction from the bottom 91 to the top 81. Accordingly, the extending direction of the convex side wall 82 is a direction from the top 81 to the bottom 91, and the extending direction of the concave side wall 92 is a direction from the bottom 91 to the top 81.
  • the shape of the convex side wall portion 82 and the concave side wall portion 92 is not limited to the shape of the present embodiment, and can be changed to other shapes. Examples of other shapes include a cylindrical shape and a rectangular tube shape.
  • the convex side wall portion 82 has fiber orientation along the extending direction (that is, the direction from the top portion 81 to the bottom portion 91), and the concave side wall portion 92 is extended in the extending direction (that is, from the bottom portion 91 to the top portion). Fiber orientation along the direction toward 81).
  • the convex side wall portion 82 and the concave side wall portion 92 are developed, the convex side wall portion 82 has a fiber orientation OR along its extending direction D 82.
  • the recess side wall portion 92 has a fiber orientation OR 92 along the extending direction D 92 thereof.
  • the convex side wall 82 has a radial fiber orientation that converges toward the top 81
  • the concave side wall 92 is a radial fiber that converges toward the bottom 91.
  • the convex side wall portion 82 and the concave side wall portion 92 have fiber orientation along the respective extending directions, whereby the fiber orientation in the thickness direction of the top sheet 2 is increased.
  • the compression deformation property and compression recovery property (cushion property) of No. 2 are improved. Therefore, even if the sanitary napkin 1 is compressed, liquid return (rewetting back) from the absorbent body 4 hardly occurs. Moreover, since the cushioning property of the top sheet 2 is high, the wearer is given good comfort.
  • the convex side wall portion 82 and the concave side wall portion 92 have substantially the same fiber orientation throughout the circumferential direction, but have portions with different fiber orientations. It may be.
  • the convex part side wall part 82 and the concave part side wall part 92 may have a part in which the fiber orientation before uneven forming is maintained.
  • the fiber orientation before the uneven shaping is maintained even after the uneven shaping.
  • the portions having different fiber orientations have, for example, fiber orientations along a direction orthogonal to the extending direction of the convex side wall portions 82 or the concave side wall portions 92.
  • the fibers are usually heat-sealed in a state where the fibers are oriented in the MD direction, the fibers are formed on the convex side wall portions 82 and the concave side wall portions 92 in the MD direction cross section. Although oriented in the extending direction of the side wall 92, the fibers are oriented in the direction perpendicular to the extending directions of the convex side wall 82 and the concave side wall 92 in the cross section in the CD direction.
  • Fiber orientation is a concept consisting of the orientation angle and orientation strength of the fiber, and can be measured, for example, by the following method.
  • the sample is allowed to stand so that the skin contact surface of the top sheet is positioned on the upper side.
  • a microscope for example, a scanning electron microscope such as JCM-5100 manufactured by JEOL Ltd.
  • an enlarged image is taken from a direction perpendicular to the measurement surface of the sample, printed, and transparent PET property Trace the fiber on the sheet.
  • the enlarged image is an image enlarged to a magnification capable of measuring 10 or more fibers, and the enlargement magnification is, for example, 50 to 300 times.
  • the image is taken into a personal computer, and the image is binarized by using a NexusNewQube (stand-alone version) image processing software manufactured by Nexus Corporation.
  • the orientation angle is the angle at which the fibers are most oriented
  • the orientation strength is the strength at that orientation angle. It shows that the fiber is orientating in the extending direction of a convex part side wall part or a recessed part side wall part, so that an orientation angle is near 90 degrees. Moreover, it shows that the direction of a fiber has gathered, so that orientation strength is large.
  • the case where the orientation strength is 1.05 or more is assumed to be oriented. The measurement is repeated several times (for example, 3 to 5 times), and the average value is calculated.
  • the fiber orientation at the top 81 of the convex portion 8 is different from the fiber orientation at the bottom 91 of the concave portion 9. That is, the fiber orientation OR 81 at the top 81 of the convex portion 8 is along the thickness direction, but the fiber orientation OR 91 at the bottom 91 of the concave portion 9 is not along the thickness direction. Along the direction perpendicular to the thickness direction.
  • the orientation angle is preferably 50 ° to 130 °, and the orientation strength is preferably 1.05 or more.
  • the orientation angle is preferably 0 ° to 50 ° or 130 ° to 180 °, and the orientation strength is preferably less than 1.05.
  • the fiber orientation in the thickness direction at the bottom 91 of the recess 9 is preferably smaller than the fiber orientation in the thickness direction at the recess side wall 92. Thereby, menstrual blood easily moves in the thickness direction (that is, to the absorbent body 4) without accumulating in the recess side wall portion 92.
  • the fiber orientation in the recessed part 9 changes in a direction perpendicular to the thickness direction as the absorber 4 is approached, whereby a gradient occurs in the fiber orientation, and menstrual blood is easily transmitted and diffused.
  • the orientation angle of the recess side wall portion 92 is preferably 50 ° to 130 °, and the orientation strength is preferably 1.05 or more.
  • the orientation angle of the bottom 91 of the recess 9 is preferably 0 ° to less than 50 ° or 130 ° to 180 °, and the orientation strength is preferably less than 1.05.
  • the relationship between the fiber orientation OR 81 at the top 81 of the convex portion 8 and the fiber orientation OR 91 at the bottom 91 of the concave portion 9 is preferably OR 81 > OR 91 .
  • the top part 81 of the convex part 8 has the compressive deformation property and compression recovery property (flexibility) superior to the bottom part 91 of the concave part 9.
  • the fiber orientation in the skin contact surface side portion and the fiber orientation in the absorbent body placement surface side portion are substantially equal. That is, it is preferable that radial fiber orientation toward the bottom portion 91 of the recess 9 exists in both the skin contact surface side portion and the absorber arrangement surface side portion. Thereby, the compression deformability and the compression recovery property (flexibility) of the bottom 91 of the recess 9 are improved, and the bottom 91 of the recess 9 is not easily crushed.
  • the fiber density of the top part 81 of the convex part 8 may be smaller or larger than the fiber density of the bottom part 91 of the concave part 9. Since the liquid easily moves from the lower fiber density to the higher fiber density according to the density gradient, when the fiber density at the top 81 of the convex portion 8 is smaller than the fiber density at the bottom 91 of the concave portion 9, the sanitary napkin 1 is Combined with the action and effect of the blood slipperiness-imparting agent, it has improved menstrual blood transfer from the top sheet 2 to the absorber 4.
  • the liquid is less likely to move from the higher fiber density to the lower fiber density
  • the fiber density at the top 81 of the convex portion 8 is smaller than the fiber density at the bottom 91 of the concave portion 9
  • menstrual blood migration is less than the fiber density.
  • the sanitary napkin 1 has an improved menstrual transfer property from the top sheet 2 to the absorbent body 4 due to the action effect of the blood slipperiness imparting agent. Therefore, the effect of the blood slipperiness imparting agent is remarkable when the fiber density of the top portion 81 of the convex portion 8 is larger than the fiber density of the bottom portion 91 of the concave portion 9.
  • the fiber density of the top portion 81 of the convex portion 8 is larger than the fiber density of the bottom portion 91 of the concave portion 9, the followability of the uneven shape of the top sheet 2 to the wearer's skin becomes good, so the wearer Good comfort when rearranging and walking.
  • the fiber density can be measured, for example, by the following method.
  • the cut surface of the top sheet 2 is magnified and observed using a microscope (for example, a scanning electron microscope such as JCM-5100 manufactured by JEOL Ltd.).
  • the magnification is adjusted to a magnification (for example, 150 to 500 times) at which 30 to 60 fiber cross sections can be measured.
  • the fiber density (lines / mm 2 ) is calculated based on the number of fiber cross sections and the visual field area where the number of fiber cross sections is measured. Perform measurements at several locations (for example, 3 to 5 locations) and calculate the average value.
  • the fiber density of the top portion 81 of the convex portion 8 measured in this way is preferably 30 to 150 pieces / mm 2 , more preferably 60 to 100 pieces / mm 2 , and the fiber density of the bottom portion 91 of the concave portion 9 is The number is preferably 150 to 600 / mm 2 , more preferably 300 to 550 / mm 2 .
  • the fiber amount of the top part 81 of the convex part 8 and the fiber amount of the bottom part 91 of the recessed part 9 are substantially equal. Thereby, compression deformation property and compression recovery property improve. In addition, changes in feel and breakage due to fiber unevenness are less likely to occur.
  • the fiber amount can be measured, for example, by the following method. Using a microscope (for example, Keyence digital microscope VHX-1000), the measurement site is enlarged. The enlargement magnification is, for example, 10 to 100 times. The thickness of the top of the convex part (T 81 in FIG. 4A) and the thickness of the bottom of the concave part (T 91 in FIG.
  • the fiber density of the skin contact surface side portion of the top portion 81 of the convex portion 8 is smaller than the fiber density of the absorber arrangement surface side portion. Thereby, compression deformation property and compression recovery property improve.
  • the fiber density of the skin contact surface side portion of the top portion 81 of the convex portion 8 is preferably 10 to 50 fibers / mm 2 , more preferably 15 to 30 fibers / mm 2 , and the fiber density in the absorber arrangement surface side portion. Is preferably 20 to 100 / mm 2 , more preferably 45 to 70 / mm 2 .
  • the ratio of the fiber density of the absorber placement surface side portion to the fiber density of the skin contact surface side portion is preferably about 2 to 5 times. Thereby, compression deformation property and compression recovery property improve.
  • the number of fiber fusion points at the top portion 81 of the convex portion 8 is preferably smaller than the number of fiber fusion points at the bottom portion 91 of the concave portion 9. Thereby, the touch of the top sheet 2 becomes favorable.
  • the number of fiber fusion points is calculated by counting the number of fiber fusion points per unit area (1 mm 2 ).
  • the number of fiber fusion points at the top 81 of the convex portion 8 is preferably 30 to 130 pieces / mm 2 , more preferably 50 to 100 pieces / mm 2 .
  • the number of fiber fusion points at the bottom 91 of the recess 9 is preferably 250 to 500 / mm 2 , more preferably 300 to 450 / mm 2 .
  • the thickness T 81 of the top portion 81 of the convex portion 8 is usually 0.1 to 5 mm, preferably 0.3 to 2.5 mm
  • the thickness T 82 of the convex side wall portion 82 is usually 0.1 to 5 mm, preferably Is 0.3 to 2.5 mm
  • the thickness T 91 of the bottom 91 of the recess 9 is usually 0.1 to 5 mm, preferably 0.3 to 2.5 mm
  • the thickness T 92 of the recess side wall 92 is The thickness is usually 0.1 to 5 mm, preferably 0.3 to 2.5 mm. It is preferable that the relationship between the thicknesses of the respective parts is T 81 > T 82 and T 92 > T 91 .
  • the thickness of the top sheet 2 under a load of 3 gf / cm 2 is usually 0.2 to 20 mm, preferably 0.5 to 10 mm.
  • the basis weight (average value of the entire sheet) of the top sheet 2 is usually 10 to 100 g / m 2 , preferably 20 to 50 g / m 2 .
  • the presence / absence and degree of the fiber density gradient of the top sheet 2 contains a colored liquid (for example, a pigment).
  • a colored liquid for example, a pigment
  • (Liquid) is dropped, and the color density after dropping can be evaluated. 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 top sheet 2 may be hydrophilized.
  • the hydrophilic treatment include coating of the surface of the top sheet 2 with a hydrophilic agent, addition of a hydrophilic agent to a component, corona treatment, plasma treatment, and the like.
  • the lipophilic region derived from the blood slipping agent and the hydrophilic region derived from the hydrophilic agent coexist sparsely in the top sheet 2, and menstrual blood is in the top sheet 2. It slips down from the convex part 8 of this, and it becomes easy to transfer to an absorber.
  • the back sheet 3 is a sheet through which liquid excretion such as menstrual blood cannot permeate, and can prevent leakage of liquid excretion absorbed by the absorber 4.
  • One surface (upper surface in FIG. 2) of the back sheet is an absorber arrangement surface on which the absorber 4 is arranged, and the other surface (lower surface in FIG. 2) is a non-skin contact surface (this embodiment). Then, the wearer's clothes (underwear) are in contact with each other).
  • the backsheet 3 preferably has moisture permeability in addition to liquid impermeability in order to reduce stuffiness when worn.
  • backsheet 3 examples include waterproof nonwoven fabric, synthetic resin (eg, polyethylene, polypropylene, polyethylene terephthalate, etc.) film, and composite sheet of nonwoven fabric and synthetic resin film (eg, nonwoven fabric such as spunbond and spunlace). And a composite film in which a breathable synthetic resin film is bonded), 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.
  • synthetic resin eg, polyethylene, polypropylene, polyethylene terephthalate, etc.
  • composite sheet of nonwoven fabric and synthetic resin film eg, nonwoven fabric such as spunbond and spunlace
  • 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 absorber 4 contains an absorbent material that absorbs liquid excreta such as menstrual blood.
  • the absorbent material contained in the absorber 4 is not particularly limited as long as it can absorb and retain liquid excretion such as menstrual blood.
  • Examples of the absorbent material include a water-absorbing fiber and a highly water-absorbing material (for example, a highly water-absorbing resin and a highly water-absorbing fiber).
  • the absorber 4 includes additives such as 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, and a plasticizer. You may contain as needed.
  • water-absorbing fibers include wood pulp obtained from softwood or hardwood (for example, mechanical pulp such as groundwood pulp, refiner ground pulp, thermomechanical pulp, chemithermomechanical pulp; kraft pulp, sulfide pulp, alkaline pulp, etc. Chemical pulp; semi-chemical pulp, etc.]; mercerized pulp or crosslinked pulp obtained by chemically treating wood pulp; non-wood pulp such as bagasse, kenaf, bamboo, hemp, cotton (eg cotton linter); rayon, fibril Examples include regenerated cellulose such as rayon; semi-synthetic cellulose such as acetate and triacetate, but pulverized pulp is preferred because it is low in cost and easy to mold.
  • wood pulp obtained from softwood or hardwood for example, mechanical pulp such as groundwood pulp, refiner ground pulp, thermomechanical pulp, chemithermomechanical pulp; kraft pulp, sulfide pulp, alkaline pulp, etc. Chemical pulp; semi-chemical pulp, etc.]; mercerized pulp or crosslinked pulp obtained by chemically treating wood pulp;
  • the superabsorbent material examples include starch, cellulose, and synthetic polymer superabsorbent materials.
  • starch-based or cellulose-based superabsorbent material examples include starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked products of sodium carboxymethyl cellulose.
  • Synthetic polymers examples include polyacrylates, polysulfonates, maleic anhydrides, polyacrylamides, polyvinyl alcohols, polyethylene oxides, polyaspartates, polyglutamates , Polyalginate-based, starch-based, and cellulose-based superabsorbent resins (Superabsorbent Polymer: SAP), and the like. Resins are preferred.
  • shape of the superabsorbent material include particulates, fibers, and scales. In the case of particulates, the particle size is preferably 50 to 1000 ⁇ m, more preferably 100 to 600 ⁇ m. .
  • the absorbent body 4 contains a highly water-absorbing material (for example, highly water-absorbing resin, highly water-absorbing fiber, etc.), the content of the highly water-absorbing material is usually 5 to 80% by mass, preferably 10%. It is ⁇ 60 mass%, more preferably 20 to 40 mass%.
  • a highly water-absorbing material for example, highly water-absorbing resin, highly water-absorbing fiber, etc.
  • the absorber 4 may contain silver, copper, zinc, silica, activated carbon, aluminosilicate compound, zeolite or the like. Thereby, functions, such as a deodorizing property, antibacterial property, and an endothermic effect, can be provided to an absorber.
  • the thickness, basis weight, etc. of the absorbent body 4 can be appropriately adjusted according to the characteristics (for example, absorbency, strength, lightness, etc.) that the sanitary napkin 1 should have.
  • the thickness of the absorber 4 is usually 0.1 to 15 mm, preferably 1 to 10 mm, more preferably 2 to 5 mm, and the basis weight is usually 20 to 1000 g / m 2 , preferably 50 to 800 g / m 2 , 100 to 500 g / m 2 is preferable.
  • the thickness, basis weight, etc. of the absorber 4 may be constant throughout the absorber 4 or may be partially different.
  • the absorbent body 4 is preferably in a form having a core containing an absorbent material and a core wrap covering the core.
  • the core wrap is not particularly limited as long as it has liquid permeability and absorber retention.
  • Examples of the core wrap include a nonwoven fabric, a woven fabric, a synthetic resin film in which liquid permeation holes are formed, and a net-like sheet having a mesh.
  • a wet method using pulverized pulp as a main material A tissue molded with is preferred.
  • the sanitary napkin 1 may include a second sheet disposed between the top sheet 2 and the absorbent body 4 in addition to the top sheet 2.
  • the blood slipperiness imparting agent may be applied to the second sheet.
  • the second sheet is not particularly limited as long as liquid excretion such as menstrual blood can permeate, and the thickness, basis weight, density, etc. of the second sheet are appropriately adjusted within a range where liquid excretion such as menstrual blood can permeate. can do.
  • Examples of the second sheet include a nonwoven fabric, a woven fabric, a synthetic resin film in which liquid permeation holes are formed, and a net-like sheet having a mesh.
  • Examples of the nonwoven fabric include air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, needle punched nonwoven fabric, melt blown nonwoven fabric, and combinations thereof (for example, SMS).
  • natural fibers wool, cotton, etc.
  • regenerated fibers rayon, acetate, etc.
  • inorganic fibers glass fibers, carbon fibers, etc.
  • synthetic resin fibers polyethylene, polypropylene, polybutylene, ethylene-vinyl acetate copolymer, Polyolefins such as ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ionomer resin; polyesters such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polylactic acid; De), and the like.
  • Nonwoven fabrics include core / sheath fibers, side-by-side fibers, island / sea fibers, etc .; hollow fibers; flat fibers, Y-shaped fibers, C-shaped fibers, etc .; latent crimps or manifestations Crimped three-dimensional crimped fibers; split fibers that are split by a physical load such as water flow, heat, and embossing may be mixed.
  • the manufacturing method which concerns on this embodiment cuts out the process (process 1) of laminating an absorber, the process of laminating a top sheet (process 2), the process of laminating a back sheet (process 3), and a sanitary napkin.
  • a manufacturing apparatus 200 shown in FIG. 6 is used, including a step (step 4) and a step (step 5) of applying a blood slipperiness-imparting agent to a sanitary napkin.
  • Step 1 On the peripheral surface of the suction drum 220 that rotates in the transport direction MD, recesses 224 are formed at a required pitch in the circumferential direction as a mold for filling the absorbent material 222.
  • the suction unit 226 acts on the recess 224, and the absorber material 222 supplied from the material supply unit 221 is sucked into the recess 224 by vacuum.
  • the material supply unit 221 is formed so as to cover the suction drum 220, and the material supply unit 221 supplies the absorber material 222 to the recess 224 by air conveyance, and the absorber 4 is formed in the recess 224.
  • the absorber 4 formed in the recess 224 is transferred onto the carrier sheet 210 that proceeds in the transport direction MD.
  • the top sheet 2 is laminated on the absorber 4 to form a laminate LB1.
  • the manufacturing method of the top sheet 2 is mentioned later.
  • a pressing groove is formed in the laminated body LB1 as necessary.
  • the compressed groove is formed by the embossing device 230.
  • the embossing device 230 includes an upper roll 231 having a convex portion (not shown) provided on the outer peripheral surface, and a lower roll 232 having a smooth outer peripheral surface.
  • the convex portion of the upper roll 231 is formed so as to correspond to the shape of the compressed groove, the arrangement pattern, and the like.
  • the laminated body LB1 passes between the upper roll 231 and the lower roll 232 of the embossing device 230, the laminated body LB1 is compressed in the thickness direction, and a compressed groove is formed in the laminated body LB1.
  • the compressed groove is formed, for example, in the periphery of the excretory opening contact area 20, the peripheral area of the peripheral area of the excretion opening contact area 20, or the like in the top sheet 2.
  • the top sheet 2 is integrated with the absorbent body 4 by forming the compressed grooves.
  • the pressing groove forming step by the embossing device 230 is omitted when it is not necessary.
  • Step 3 The back sheet 3 supplied from the back sheet roll 240 is laminated on the lower surface (opposite side of the top sheet 2) of the laminated body LB2 via an adhesive layer to form the laminated body LB3.
  • the laminated body LB2 and the laminated body LB3 are the same.
  • Step 4 The laminate LB3 is cut using the cutter 250, and a sanitary napkin is cut out.
  • the blood slipperiness imparting agent 261 is applied to the top sheet 2 of the sanitary napkin using the spray 260 to form a blood slipperiness imparting agent layer on the surface of the top sheet 2.
  • the blood slipperiness-imparting agent layer is formed at least in the excretion opening contact region 20 in the skin contact surface of the top sheet 2.
  • the blood slipperiness-imparting agent is applied after cutting out the sanitary napkin, but it may be applied at any stage before cutting out, or it may be applied in the top sheet manufacturing process. Good. In order to prevent the blood slipperiness-imparting agent applied during production from flowing down, it is preferable to apply the blood slipperiness-imparting agent immediately downstream of the manufacturing process, for example, immediately before packaging a sanitary napkin.
  • the manufacturing method of the sanitary napkin 1 can include, in addition to steps 1 to 5, a step of forming the seal portions 7a, 7b, 8a, 8b, a step of forming the adhesive portions 9a, 9b, 9c, and the like.
  • the conveyor belt 110 rotates in the conveying direction MD while being supported by the upper rollers 111a and 111b and the lower rollers 111c and 111d.
  • a plurality of protrusions 112 are formed on the web conveyance surface of the conveyor belt 110, and the web conveyance surface is uneven. Further, a plurality of vent holes (not shown) are formed on the web conveyance surface of the conveyor belt 110.
  • the protrusion 112 has a tapered shape whose diameter gradually decreases toward the tip, and the tip has a rounded shape.
  • the height of the protrusion 112 is, for example, 0.5 to 20 mm. If the height of the projection 112 is too low, the uneven shaping on the fiber web 50 may be insufficient, while if too high, the projection 112 may penetrate the fiber web 50 when hot air is blown. . From this viewpoint, the height of the protrusion 112 is preferably 1 to 10 mm.
  • the pitch of the protrusions 112 in the MD direction is 1 to 20 mm, and the pitch in the direction perpendicular to the MD direction (CD direction) is 1 to 20 mm.
  • the CD direction coincides with the width direction of the fiber web 50.
  • the opening ratio (total area of the air holes / surface area of the conveyor belt 110) of the air holes (not shown) is preferably 20 to 45%, more preferably 25 to 40%. If the opening ratio is too low, the uneven shaping on the fiber web 50 may be insufficient, while if it is too high, the fiber web 50 will enter the vent hole when hot air is blown, and it will be difficult to peel off from the conveyor belt 110.
  • the conveyor belt 110 which is supported by the rollers 111a to 111d and rotates, supports the fiber web 50 by the protrusions 112 formed on the conveying surface thereof and conveys it in the MD direction.
  • a pair of drive rolls 151 and 152 are provided on the upstream side of the conveyor belt 110.
  • the drive rolls 151 and 152 supply the fiber web 50 manufactured by the card machine to the conveyor belt 110.
  • a tension detector (not shown) and the peripheral speed V1 of the driving rolls 151 and 152 are controlled based on the magnitude of the tension detected by the tension detector.
  • a control unit (not shown). The controller adjusts the peripheral speed V1 of the drive rolls 151 and 152 relative to the peripheral speed V2 of the conveyor belt 110 based on the detection output of the tension detector. Thereby, the tension of the fiber web 50 supplied to the first nozzle 120 is adjusted to a desired tension.
  • the control unit increases the circumferential speed V1 of the drive rolls 151 and 152 to the first nozzle 120 than the circumferential speed V2 of the conveyor belt.
  • the tension of the fiber web 50 is reduced.
  • the control unit makes the peripheral speed V1 of the drive rolls 151 and 152 smaller than the peripheral speed V2 of the conveyor belt 110, and causes the first nozzle 120 to The tension of the supplied fiber web 50 is increased.
  • the peripheral speed V1 of the drive rolls 151 and 152 which is relatively adjusted, is the speed of the roll surface, and the peripheral speed V2 of the conveyor belt 110 is the speed of the web conveyance surface.
  • the manufacturing apparatus 100 sprays the 1st nozzle 120 which performs the 1st air through process by spraying the 1st heating fluid H1 in order toward MD direction, and the 2nd heating fluid H2.
  • a second nozzle 130 that performs the second air-through process and a third nozzle 140 that sprays the third heating fluid H3 and performs the third air-through process are provided.
  • the manufacturing apparatus 100 includes a cooling unit 160 that is disposed between the second nozzle 130 and the third nozzle 140 and that cools the fiber web 50.
  • the first nozzle 120 and the second nozzle 130 perform an uneven shape forming process for the fiber web 50, and the third nozzle 140 performs a fuzz reduction process. If it is not necessary to reduce fuzz, the processing by the third nozzle 140 may be omitted.
  • the first air-through process is a process in which the first heating fluid H1 is sprayed by the first nozzle 120 onto the fiber web 50 that is supported and conveyed by the protrusion 112 of the conveyor belt 110.
  • the fiber web 50 is shaped into a concavo-convex shape along the shape of the projection 112 of the conveyor belt 110, and the constituent fibers of the fiber web 50 are melted by heat-fusible fibers.
  • the uneven shape is maintained by heat fusion by solidification.
  • the first nozzle 120 ejects the first heated fluid H1 from its ejection hole (not shown) and sprays it almost perpendicularly to the fiber web 50 on the conveyor belt 110.
  • the first heating fluid H1 air, water vapor or the like heated to a predetermined temperature by a first heater (not shown) provided in the first nozzle 120 is used.
  • the first heating fluid H1 is heated by the first heater up to a temperature at which the uneven shape of the fiber web 50 applied by spraying the first heating fluid H1 is maintained by thermal fusion of the constituent fibers of the fiber web 50. Heated.
  • the fiber web 50 contains a core-sheath type composite fiber in which the sheath component (low melting point component) is polyethylene (PE) and the core component (high melting point component) is polyethylene terephthalate (PET)
  • the first The temperature of the heating fluid H1 is preferably 80 to 155 ° C., more preferably 130 to 135 ° C.
  • the uneven shaping of the fiber web 50 becomes insufficient, while if it is too high than the melting point of the low melting point component, Since the constituent fibers of the fiber web 50 are rapidly fused and the degree of freedom of the fibers is reduced, the uneven shaping of the fiber web 50 becomes insufficient.
  • the wind speed of the first heating fluid H1 is preferably 20 to 120 m / sec, more preferably 40 to 80 m / sec.
  • the fiber web 50 will not fully follow the projection part 112, and the uneven
  • the fiber web 50 constituent fibers are selected by the protrusion 112, and the uneven shaping of the fiber web 50 becomes insufficient.
  • the spraying time of the first heating fluid H1 is preferably 0.01 to 0.5 seconds, more preferably 0.04 to 0.08 seconds.
  • the spraying time is too short, the unevenness shaping of the fiber web 50 becomes insufficient.
  • the spraying time is too long, the constituent fibers of the fiber web 50 are selected by the protrusions 112, and the unevenness shaping of the fiber web 50 is performed. It becomes insufficient.
  • the desired speed is adjusted by adjusting the peripheral speed V1 of the drive rolls 151 and 152.
  • the convex part side wall part and concave part side wall part which have the fiber density and fiber amount (basis weight) are formed.
  • the fiber web 50 is processed by the first nozzle 120 by setting the peripheral speed V1 of the drive rolls 151 and 152 to be higher than the peripheral speed V2 of the conveyor belt 110, the fiber web 50 is over-fed and uneven. A decrease in fiber density and fiber amount (basis weight) of the convex side wall and the concave side wall that may occur during shaping is prevented.
  • the circumferential speed V1 of the drive rolls 151, 152 is preferably 1 to 2 times, more preferably 1 to 1.5 times the circumferential speed V2 of the conveyor belt 110.
  • the 1st heating fluid H1 which passed the fiber web 50 is discharged
  • the fiber web 50 that has undergone the first air-through process is conveyed to the position of the second nozzle 130 while being placed on the conveyor belt 110.
  • a 2nd air through process is a process of spraying the 2nd heating fluid H2 with the 2nd nozzle 130 with respect to the fiber web 50 which passed the 1st air through process.
  • the constituent fibers of the fiber web 50 are heat-sealed by melting and solidifying the heat-fusible fibers, and the uneven shape of the fiber web 50 applied in the first air-through process is fixed. The In this way, the fibrous web 50 is formed with unevenness through the first and second air-through processes.
  • the second nozzle 130 ejects the second heated fluid H2 from its ejection hole (not shown) and blows it almost perpendicularly to the fiber web 50 on the conveyor belt 110.
  • the second heating fluid H2 air, water vapor or the like heated to a predetermined temperature by a second heater (not shown) provided in the second nozzle 130 is used.
  • the second heating fluid H ⁇ b> 2 is heated by the second heater to a temperature at which the constituent fibers of the fiber web 50 are heat-sealed while the uneven shape of the fiber web 50 is maintained.
  • the fiber web 50 is a composite fiber having a low-melting-point component and a high-melting-point component having a higher melting point than the low-melting-point component
  • the second heating fluid H2 has a temperature from the melting point of the low-melting-point component to the melting point of the high-melting-point component. Be controlled.
  • the temperature of the second heating fluid H2 is: The temperature is preferably 130 to 155 ° C, more preferably 135 to 150 ° C. If the temperature of the second heating fluid H2 is too low, the thermal fusion between the constituent fibers becomes insufficient, and the unevenness of the fiber web 50 is insufficiently fixed, while the temperature of the second heating fluid H2 is high. If it is too much, the texture of the nonwoven fabric becomes worse and it becomes difficult to produce bulk.
  • the wind speed of the second heating fluid H2 is preferably 1 to 10 m / second, more preferably 2 to 8 m / second. If the wind speed of the second heating fluid H2 is too slow, the amount of heat will be insufficient, and the strength of the nonwoven fabric will be insufficient. The thickness is reduced due to heat fusion.
  • the spraying time of the second heating fluid H2 is preferably 0.03 to 5 seconds, more preferably 0.1 to 1 second.
  • the spraying time is too short, the constituent fibers of the fiber web 50 are not sufficiently fused to each other, and the unevenness of the fiber web 50 is insufficiently fixed.
  • the spraying time is too long, the constituent fibers of the fiber web 50 are formed. The heat fusion between the two proceeds excessively.
  • the cooling process is a process in which the cooling unit 160 cools the fiber web 50 that has been unevenly shaped through the first and second air-through processes. Cooling strengthens the thermal fusion point of the constituent fibers of the fiber web 50.
  • the cooling unit 160 is a space arranged between the second nozzle 130 and the third nozzle 140. This space naturally cools the fiber web 50 after the second air-through process.
  • the cooling unit 160 may be provided with a cooling device that forcibly cools the fiber web 50. Examples of the forced cooling method include spraying of a cooling fluid from a cooling nozzle and contact with a cooling roller.
  • the cooling temperature is preferably a temperature lower than the melting point of the heat-fusible fiber contained in the fiber web 50. When the thermoplastic fiber is a core-sheath type composite fiber, it is preferably lower than the melting point of the low-melting point component. Is also a low temperature.
  • the cooling temperature is, for example, 100 ° C. or less.
  • a 3rd air through process is a process of spraying the 3rd heating fluid H3 with the 3rd nozzle 140 with respect to the fiber web 50 which passed through the cooling process.
  • the fluffed fibers and the non-fluffed fibers are thermally fused at a new fusion point, and a shaped nonwoven fabric without fluff is produced.
  • the third nozzle 140 ejects the third heating fluid H3 from its ejection hole (not shown) and sprays it almost perpendicularly to the fiber web 50 on the conveyor belt 110.
  • the third heating fluid H3 air, water vapor or the like heated to a predetermined temperature by a third heater (not shown) provided in the third nozzle 140 is used.
  • the third heating fluid H3 is heated by the third heater to a temperature at which the fuzzy fibers of the fiber web 50 and other constituent fibers are heat-sealed while the uneven shape of the fiber web 50 is maintained.
  • the fiber web 50 is a composite fiber having a low melting point component and a high melting point component having a higher melting point than the low melting point component
  • the third heating fluid H3 has a temperature ranging from the melting point of the low melting point component to the melting point of the high melting point component. Be controlled.
  • the temperature of the third heating fluid H3 is preferably 130 to 155 ° C., more preferably 130-145 ° C. If the temperature of the third heating fluid H3 is too low, heat fusion between the fibers will be insufficient, and the reduction of fuzz will be insufficient. On the other hand, if the temperature of the third heating fluid H3 is too high, other than the fuzzy fibers These fibers are also fused, and the liquid permeability is lowered.
  • the wind speed of the third heating fluid H3 is preferably 0.5 to 5 m / second, more preferably 2 to 8 m / second. If the wind speed of the third heating fluid H3 is too slow, the fluffy fibers cannot be laid down, and the reduction of the fuzz becomes insufficient. Since heat fusion occurs between the fibers, the thickness is reduced, and the feel and liquid permeability are insufficient.
  • the spraying time of the third heating fluid H3 is preferably 0.3 to 10 seconds, more preferably 2 to 6 seconds. If the spraying time is too short, the fuzzy fiber and other fibers cannot be sufficiently heat-sealed, and it becomes difficult to reduce the fuzz. On the other hand, if the spraying time is too long, fibers other than the fluffy fibers of the fiber web 50 are too fused together, the thickness becomes small, and the texture and liquid permeability are difficult to obtain.
  • 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 to about 80 mm 2 / s, preferably about 1 to about 70 mm 2 / s, more preferably about 3 to 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) Put a rubber stopper on the mouth of the test tube in a thermostatic chamber, 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 referred to as diglycerides.
  • diesters of glycerin and decanoic acid C 10
  • diesters of glycerin and dodecanoic acid C 12
  • diesters of glycerin and hexadecanoic acid C 16
  • 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.
  • Pearl Ream 6 (NOF Corporation) can be mentioned.
  • 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 since it is the same as that of the 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.
  • Tri-C2L oil fatty acid glyceride manufactured by NOF Corporation C 8 fatty acid: C 10 fatty acid: C 12 fatty acid containing approximately 37: 7: 56 weight ratio, glycerol and fatty acid triester, Weight average molecular weight: about 570
  • fatty acids manufactured by NOF Corporation C 8 fatty to C 10 are contained in approximately 85:15 weight ratio of triesters of glycerol with fatty acids, the weight average molecular weight: about 480 ⁇ Panasate 800, manufactured by NOF Corporation All fatty acids are octanoic acid (C 8 ), triester of glycerin and fatty acid, weight average molecular weight: about 470
  • Panaceate 800B manufactured by NOF Corporation All fatty acids are 2-ethylhexanoic acid (C 8 ), triester of glycerin and fatty acid, weight average molecular weight: about 470 ⁇ NA36, manufactured by NOF Corporation C 16 fatty acid: fatty acid C 18: (including both saturated and unsaturated fatty acids) fatty acids to C 20 is approximately 5: contained in a weight ratio of 3: 92 Triester of glycerin and fatty acid, weight average molecular weight: about 880
  • C 8 fatty C 10: fatty acid
  • C 12 fatty acid
  • C 14 (including both saturated and unsaturated fatty acids)
  • C 16 is approximately 4 : Triester of glycerin and fatty acid, contained in a weight ratio of 8: 60: 25: 3, weight average molecular weight: 670 -Caprylic acid diglyceride, manufactured by NOF Corporation
  • Fatty acid is octanoic acid, diester of glycerin and fatty acid, weight average molecular weight: 340
  • [Other materials] -NA50 manufactured by NOF Corporation Hydrogen added to NA36 to reduce the ratio of double bonds derived from the unsaturated fatty acid as a raw material Triester of glycerin and fatty acid, weight average molecular weight: about 880
  • PEG 1500 manufactured by NOF Corporation, polyethylene glycol, weight average molecular weight: about 1,500 to about 1,600 -Wilbright cp9, manufactured by NOF Co., Ltd.
  • Nonionic S-6 polyoxyethylene monostearate manufactured by NOF Corporation, about 7 repeating units, weight average molecular weight: about 880 ⁇ Unilube 5TP-300KB Polyoxyethylene polyoxypropylene pentaerythritol ether produced by adding 5 mol of ethylene oxide and 65 mol of propylene oxide to 1 mol of pentaerythritol, weight average molecular weight: 4,130
  • Top sheet formed from air-through nonwoven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g / m 2 ) treated with a hydrophilic agent, and air-through nonwoven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 30 g) / M 2 ), a pulp (basis weight: 150 to 450 g / m 2 , more in the center), an acrylic superabsorbent polymer (basis weight: 15 g / m 2 ), and a tissue as a core wrap.
  • An absorbent body, a side sheet treated with a water repellent, and a back sheet made of a polyethylene film were prepared.
  • the top sheet is a top sheet having a ridge groove structure manufactured according to the method described in Japanese Patent Application Laid-Open No. 2008-2034.
  • the ridge portion has a thickness of about 1.5 mm and the groove portion has a thickness of about 0.00 mm.
  • the pitch of the ridge groove structure was about 4 mm, and an opening portion having an opening ratio of about 15% was formed in the groove portion.
  • Unistar H-408BRS (manufactured by NOF Corporation, tetraester of pentaerythritol and fatty acid) is selected as a blood slipperiness-imparting agent, and the skin contact surface ( ⁇ ⁇ ⁇ ) of the top sheet from a control seam HMA gun at room temperature.
  • the groove surface was coated with a basis weight of 5.0 g / m 2 .
  • H-408BRS was in the form of fine particles and adhered to the fiber surface.
  • the back sheet, the absorbent body, the second sheet, and the top sheet were sequentially laminated with the groove surface facing up, whereby a sanitary napkin no. 1-1 was formed.
  • the blood slipperiness-imparting agent was changed from Unistar H-408BRS to that shown in Table 2, and sanitary napkin no. 1-2 to No. 1-49 was produced.
  • the blood slipperiness-imparting agent is a liquid at room temperature
  • the blood slipperiness-imparting agent is a solid at room temperature
  • it is heated to the melting point + 20 ° C., and then a control seam HMA gun is used.
  • the blood slipperiness imparting agent was atomized and applied to the skin contact surface of the top sheet so that the basis weight was approximately 5 g / m 2 .
  • lubricity imparting agent was applied to the substantially whole surface of the skin contact surface of a top sheet, and to both a collar part and a groove part.
  • Mass of top sheet After measuring W 2 (g) (mass of top sheet before test), an acrylic plate having a hole in the center of the absorbent article in the longitudinal direction and width direction and on the top sheet ( Place 200mm x 100mm, 125g, 40mm x 10mm hole in the center, and from the hole, 37 ⁇ 1 ° C equine EDTA blood (ethylenediaminetetraacetic acid (hereinafter referred to as equine blood to prevent coagulation) 4.0 g) was added dropwise with a pipette.
  • W 2 (g) mass of top sheet before test
  • tackiness of the skin contact surface of the top sheet was measured at 35 ° C. according to the following criteria. ⁇ : No tackiness ⁇ : Some tackiness is present ⁇ : There is tackiness
  • FIG. 7 shows an electron micrograph of the skin contact surface of the top sheet in a sanitary napkin where the top sheet contains tri-C2L oil fatty acid glycerides.
  • Sanitary napkin No. which does not have a blood slipperiness imparting agent.
  • the surface residual rate A was 7.5% by mass, but the kinematic viscosity and water retention rate were within the predetermined ranges. 1-1-No. In 1-21, the surface residual ratio A was 2.5 mass% or less.
  • sanitary napkins no. 1-1-No. 1-21 suggests that when a large amount of menstrual blood reaches the top sheet at a time, menstrual blood can be rapidly transferred from the top sheet to the absorber.
  • the top sheet is a top sheet having a ridge groove structure manufactured according to the method described in Japanese Patent Application Laid-Open No. 2008-2034.
  • the ridge portion has a thickness of about 1.5 mm and the groove portion has a thickness of about 0.00 mm.
  • the pitch of the ridge groove structure was about 4 mm, and an opening portion having an opening ratio of about 15% was formed in the groove portion.
  • Unistar H-408BRS (manufactured by NOF Corporation, tetraester of pentaerythritol and fatty acid) is selected as a blood slipperiness-imparting agent, and the skin contact surface ( ⁇ ⁇ ⁇ ) of the top sheet from a control seam HMA gun at room temperature.
  • the groove surface was coated with a basis weight of 5.0 g / m 2 .
  • H-408BRS was in the form of fine particles and adhered to the fiber surface.
  • the back sheet, the absorbent body, the second sheet, and the top sheet were sequentially laminated with the groove surface facing up, whereby a sanitary napkin no. 2-1 (i) was formed.
  • a top sheet made of a flat, air-through nonwoven fabric composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g / m 2
  • flat hydrophilic agent
  • the blood slipperiness-imparting agent was changed from Unistar H-408BRS to that shown in Table 3, and sanitary napkin no. 2-2 (i) -No. 2-11 (i) and No. 2-11. 2-2 (ii) -No. 2-11 (ii) was prepared.
  • the blood slipperiness-imparting agent is a liquid at room temperature
  • the blood slipperiness-imparting agent is a solid at room temperature
  • it is heated to the melting point + 20 ° C., and then a control seam HMA gun is used.
  • the blood slipperiness imparting agent was atomized and applied to the skin contact surface of the top sheet so that the basis weight was approximately 5 g / m 2 .
  • lubricity imparting agent was apply
  • Weight of top sheet W 4 (g) (mass of top sheet before test) was measured, and then the horse EDTA blood at 37 ⁇ 1 ° C. was placed on the center top sheet in the longitudinal direction and width direction of the absorbent article. About 0.25 g (2 drops) was dropped from the pipette. In the top sheet having the groin, equine EDTA blood was dropped on the top of the buttock.
  • the viscosity of equine defibrinated blood containing 2% by mass of panacet 810s was 5.9 mPa ⁇ s, while the viscosity of equine defibrinated blood not containing a blood slipperiness agent was 50.4 mPa ⁇ s. Therefore, it can be seen that equine defibrinated blood containing 2% by mass of panacet 810s decreases the viscosity by about 90% compared to the case where no blood slipperiness-imparting agent is contained.
  • blood contains components such as blood cells and has thixotropic properties, but the blood slipperiness imparting agent of the present disclosure has an action of lowering the viscosity of blood such as menstrual blood in a low viscosity region. It is thought to have. By reducing the viscosity of blood, it is considered that absorbed menstrual blood is easily transferred from the top sheet to the absorber.
  • red blood cells form aggregates such as remuneration, but in menstrual blood that includes panacet 810s, red blood cells are each stably dispersed. I understand that. Therefore, it is suggested that the blood slipperiness imparting agent also has a function of stabilizing red blood cells in blood.
  • the density ⁇ is defined in 5. of “Density Test Method and Density / Mass / Capacity Conversion Table” of JIS K 2249-1995. Based on the vibration density test method, the temperature was measured as shown in Table 4 below. For measurement, DA-505 of Kyoto Electronics Industry Co., Ltd. was used. The results are shown in Table 4 below.
  • the blood slipperiness-imparting agent also has an action of lowering the surface tension of blood.
  • the absorbed blood can be quickly transferred to the absorbent body without being held between the fibers of the top sheet.

Abstract

La présente invention a pour objectif de fournir un article absorbant qui présente des propriétés améliorées pour déplacer des menstruations d'une feuille supérieure vers un corps absorbant, et diminue les menstruations résiduelles sur la feuille supérieure. La présente invention concerne une serviette hygiénique (1) contenant une feuille supérieure (2) perméable au liquide, une feuille arrière (3) imperméable au liquide, et un corps absorbant (4) situé entre la feuille supérieure (2) et la feuille arrière (3). Un agent de fluidification du sang qui est déposé sur des saillies (8) formées dans une zone de contact de la feuille supérieure (2) avec un orifice excrétoire a une viscosité cinétique de 0,01 à 80 mm2/s à 40 °C, un taux de rétention d'eau de 0,01 à 4,0 % en masse, et un poids moléculaire moyen en poids inférieur à 1 000.
PCT/JP2013/076727 2012-10-03 2013-10-01 Article absorbant WO2014054649A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380062904.0A CN104822349B (zh) 2012-10-03 2013-10-01 吸收性物品

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012221737A JP6004878B2 (ja) 2012-10-03 2012-10-03 吸収性物品
JP2012-221737 2012-10-03

Publications (1)

Publication Number Publication Date
WO2014054649A1 true WO2014054649A1 (fr) 2014-04-10

Family

ID=50434974

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/076727 WO2014054649A1 (fr) 2012-10-03 2013-10-01 Article absorbant

Country Status (3)

Country Link
JP (1) JP6004878B2 (fr)
CN (1) CN104822349B (fr)
WO (1) WO2014054649A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016060212A1 (fr) * 2014-10-17 2016-04-21 花王株式会社 Produit absorbant
JP2016077888A (ja) * 2014-10-17 2016-05-16 花王株式会社 吸収性物品
CN107072831A (zh) * 2014-10-17 2017-08-18 花王株式会社 吸收性物品
US10667961B2 (en) 2014-06-30 2020-06-02 Unicharm Corporation Absorbent article and wearable article including absorbent article
US11154431B1 (en) 2020-11-06 2021-10-26 Mast Industries (Far East) Limited Absorbent garment and method of manufacture thereof
TWI763882B (zh) * 2017-10-11 2022-05-11 日商優你 嬌美股份有限公司 吸收性物品的透液性薄片用不織布及不織布卷

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6467242B2 (ja) * 2015-02-18 2019-02-06 花王株式会社 吸収性物品
JP6629542B2 (ja) * 2015-08-04 2020-01-15 花王株式会社 吸収性物品
JP6351648B2 (ja) 2016-03-23 2018-07-04 ユニ・チャーム株式会社 吸収性物品
JP6087462B1 (ja) * 2016-05-13 2017-03-01 ユニ・チャーム株式会社 吸収性物品
JP7212985B2 (ja) * 2018-09-13 2023-01-26 大王製紙株式会社 連結式使い捨て着用物品
CN111150559B (zh) * 2018-11-08 2022-08-19 尤妮佳股份有限公司 吸收性物品

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010518918A (ja) * 2007-02-16 2010-06-03 ザ プロクター アンド ギャンブル カンパニー ポリプロピレングリコール材料を含むローションを備える吸収性物品
JP2011510801A (ja) * 2008-02-15 2011-04-07 ザ プロクター アンド ギャンブル カンパニー ポリプロピレングリコール材料を含むローションを備える吸収性物品
JP2012136791A (ja) * 2010-12-24 2012-07-19 Kao Corp 不織布及びこれを用いた吸収性物品
JP2012236001A (ja) * 2011-04-28 2012-12-06 Unicharm Corp 吸収性物品
WO2013129236A1 (fr) * 2012-02-29 2013-09-06 ユニ・チャーム株式会社 Article absorbant

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5643588A (en) * 1994-11-28 1997-07-01 The Procter & Gamble Company Diaper having a lotioned topsheet
JP2003192563A (ja) * 2001-12-26 2003-07-09 Lion Corp 含浸用組成物、皮膚保護用含浸体
JP4514630B2 (ja) * 2005-03-16 2010-07-28 花王株式会社 吸収性物品の表面シート
EP2258408A1 (fr) * 2006-04-05 2010-12-08 The Procter & Gamble Company Articles absorbant avec un système de contrôle des odeurs.
WO2012086730A1 (fr) * 2010-12-24 2012-06-28 花王株式会社 Tissu non tissé et article absorbant utilisant ledit tissu

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010518918A (ja) * 2007-02-16 2010-06-03 ザ プロクター アンド ギャンブル カンパニー ポリプロピレングリコール材料を含むローションを備える吸収性物品
JP2011510801A (ja) * 2008-02-15 2011-04-07 ザ プロクター アンド ギャンブル カンパニー ポリプロピレングリコール材料を含むローションを備える吸収性物品
JP2012136791A (ja) * 2010-12-24 2012-07-19 Kao Corp 不織布及びこれを用いた吸収性物品
JP2012236001A (ja) * 2011-04-28 2012-12-06 Unicharm Corp 吸収性物品
WO2013129236A1 (fr) * 2012-02-29 2013-09-06 ユニ・チャーム株式会社 Article absorbant

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10667961B2 (en) 2014-06-30 2020-06-02 Unicharm Corporation Absorbent article and wearable article including absorbent article
WO2016060212A1 (fr) * 2014-10-17 2016-04-21 花王株式会社 Produit absorbant
JP2016077888A (ja) * 2014-10-17 2016-05-16 花王株式会社 吸収性物品
CN107072831A (zh) * 2014-10-17 2017-08-18 花王株式会社 吸收性物品
TWI683655B (zh) * 2014-10-17 2020-02-01 日商花王股份有限公司 吸收性物品
TWI763882B (zh) * 2017-10-11 2022-05-11 日商優你 嬌美股份有限公司 吸收性物品的透液性薄片用不織布及不織布卷
US11154431B1 (en) 2020-11-06 2021-10-26 Mast Industries (Far East) Limited Absorbent garment and method of manufacture thereof
US11957552B2 (en) 2020-11-06 2024-04-16 Mast Industries (Far East) Limited Absorbent garment and method of manufacture thereof

Also Published As

Publication number Publication date
JP6004878B2 (ja) 2016-10-12
CN104822349B (zh) 2019-08-23
CN104822349A (zh) 2015-08-05
JP2014073213A (ja) 2014-04-24

Similar Documents

Publication Publication Date Title
JP6062199B2 (ja) 吸収性物品
JP6004878B2 (ja) 吸収性物品
JP6184721B2 (ja) 吸収性物品
JP6112816B2 (ja) 吸収性物品
JP6021566B2 (ja) 吸収性物品
JP6021565B2 (ja) 吸収性物品
JP6195770B2 (ja) 吸収性物品
WO2014050767A1 (fr) Article absorbant
JP5745487B2 (ja) 吸収性物品
WO2013154072A1 (fr) Article absorbant
JP2014068934A (ja) 吸収性物品
JP6202967B2 (ja) 吸収性物品
JPWO2013146711A1 (ja) 吸収体及びこれを備えた吸収性物品
JP6041473B2 (ja) 吸収性物品
JP6073101B2 (ja) 吸収性物品
JP5988811B2 (ja) 吸収性物品
JP3211401U (ja) 吸収体及びこれを備えた吸収性物品
JP5885633B2 (ja) 吸収性物品
JP3211431U (ja) 吸収性物品

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13843260

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: IDP00201502499

Country of ref document: ID

122 Ep: pct application non-entry in european phase

Ref document number: 13843260

Country of ref document: EP

Kind code of ref document: A1