WO2015186377A1 - Absorbent article - Google Patents

Absorbent article Download PDF

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Publication number
WO2015186377A1
WO2015186377A1 PCT/JP2015/052956 JP2015052956W WO2015186377A1 WO 2015186377 A1 WO2015186377 A1 WO 2015186377A1 JP 2015052956 W JP2015052956 W JP 2015052956W WO 2015186377 A1 WO2015186377 A1 WO 2015186377A1
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WO
WIPO (PCT)
Prior art keywords
styrene
block copolymer
absorbent article
thermoplastic elastomer
gel
Prior art date
Application number
PCT/JP2015/052956
Other languages
French (fr)
Japanese (ja)
Inventor
和田 一郎
中下 将志
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 AU2015269953A priority Critical patent/AU2015269953B2/en
Priority to BR112016028487A priority patent/BR112016028487A2/en
Priority to KR1020167033619A priority patent/KR102117144B1/en
Priority to CN201580030129.XA priority patent/CN106456390B/en
Publication of WO2015186377A1 publication Critical patent/WO2015186377A1/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51113Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47Sanitary towels, incontinence pads or napkins
    • A61F13/472Sanitary towels, incontinence pads or napkins specially adapted for female use
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/225Mixtures of macromolecular compounds
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/34Oils, fats, waxes or natural resins
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F2013/51059Absorbent 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 being sprayed with chemicals
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51Absorbent 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
    • A61F13/511Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51113Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control
    • A61F2013/51117Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control the lotion having skin care properties

Definitions

  • the present invention relates to an absorbent article having a gel-like composition with a small tackiness on the surface while having an appropriate hardness, elongation and sustained release of active ingredients.
  • the present invention also relates to a non-woven fabric having a gel-like composition having a small tackiness on the surface while having an appropriate hardness, elongation and sustained release of active ingredients.
  • Absorbent articles such as sanitary napkins, panty liners, and diapers have improved their basic performance such as absorption performance through technological developments accumulated over many years, and absorb excrement such as menstrual blood and urine compared to before After that, leaks and the like are less likely to occur, and at present, there is a demand for further enhancement of functionality, for example, having a feeling of wearing close to underwear, excellent flexibility and cushioning.
  • Patent Document 1 discloses an absorbent article including an effective amount of a lotion coating on at least a part of the outer surface of a top sheet that is semisolid or solid at 20 ° C. and partially movable to the skin of the wearer. Is disclosed. Further, according to Patent Document 1, the lotion coating comprises (i) 10 to 95% having a plasticity or fluidity consistency at 20 ° C., a petroleum-based emollient, a fatty acid ester emollient, an alkyl ethoxylate.
  • a substantially moisture-free emollient comprising one selected from an emollient and mixtures thereof, (ii) 5 to 90% fix the emollient on the outer surface of the topsheet Immobilizing substance which has a melting point of at least 35 ° C., preferably at least 40 ° C., and is a polyhydroxy fatty acid ester, polyhydroxy fatty acid amide, C 14 -C 22 fatty alcohol, C 12 -C 22 fatty acid , C 12 -C 22 fatty alcohol ethoxylates, and in the immobilization material selected from mixtures thereof Lutosa has been.
  • Patent Document 2 discloses an absorbent article including a liquid-permeable top sheet, a liquid-impermeable or water-repellent back sheet, and an absorbent body disposed between the two sheets.
  • An absorbent article to which a larger amount of skin care agent than the high density part is applied is disclosed.
  • paragraph [0069] of Patent Document 2 discloses a skin care agent containing a diamide derivative as an active ingredient and stearyl alcohol at a mass ratio of 5: 5.
  • an immobilizing substance having a melting point of 35 ° C. or higher is crystallized in a lotion coating at room temperature (25 ° C.), thereby increasing the viscosity of the lotion coating, thereby immobilizing the lotion coating. It has the effect
  • a high-viscosity lotion coating or skin care agent is insufficient in flexibility and elongation as a material applied to the top sheet of the absorbent article (that is, a material that comes into direct contact with the skin). May be inferior.
  • Patent Document 3 discloses a gel-like composition exhibiting delayed elasticity with respect to gel hardness and elongation.
  • the composition comprises a high molecular weight triblock styrene thermoplastic elastomer having a number average molecular weight of 130,000 or more, a low molecular weight triblock styrene thermoplastic elastomer having a number average molecular weight of 100,000 or less, a softener, A gel elastomer comprising a high molecular weight triblock type styrene elastomer that absorbs and retains a large amount of a softening agent to ensure the flexibility of the composition and contains a low molecular weight triblock type styrene elastomer.
  • the tackiness and controlled release properties of the gel surface were still insufficient.
  • an object of the present invention is to provide an absorbent article having a gel composition with less tackiness on the surface while having appropriate hardness, elongation, and sustained release of active ingredients.
  • Another object of the present invention is to provide a non-woven fabric having a gel-like composition having a small tackiness on the surface while having an appropriate hardness, elongation and sustained release of active ingredients.
  • the present invention relates to an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and the absorbent body positioned between the top sheet and the back sheet, the top sheet comprising:
  • a gel-like composition is included on the surface of the skin surface side, and the gel-like composition has a weight average molecular weight of 100,000 or more and less than 180,000, and is composed of a block copolymer of triblock or more.
  • A1 and a styrene-based thermoplastic elastomer (A2) having a weight average molecular weight of 180,000 or more and 300,000 or less and comprising a block copolymer of triblock or more, (A1) / (A2) 95/5 To 100 parts by mass of the styrene-based thermoplastic elastomer mixture (A) having a mass ratio of ⁇ 50 / 50 and a molecular weight dispersity (Mw / Mn) of 1.25 to 1.60.
  • an absorbent article having a gel composition with less tackiness on the surface while having appropriate hardness, elongation and sustained release of active ingredients.
  • FIG. 1 is a plan view showing an absorbent article according to one embodiment of the present invention.
  • FIG. 2 is a plan view showing an absorbent article according to another embodiment of the present invention.
  • the absorbent article of the present invention includes at least a liquid-permeable top sheet positioned on the wearer's skin side and a liquid-impermeable sheet positioned on the clothes side (that is, the side opposite to the wearer's skin side). And a laminated structure having the top sheet and an absorber positioned between the back sheet, and the top sheet further includes a gel composition on the skin surface side.
  • the styrenic thermoplastic elastomer (A1, A2) used for the gel composition is a block copolymer of triblock or more containing a polystyrene hard segment and a soft segment, preferably a block component comprising a styrene hard segment.
  • A1 A2 used for the gel composition is a block copolymer of triblock or more containing a polystyrene hard segment and a soft segment, preferably a block component comprising a styrene hard segment.
  • a block copolymer having two or more in the molecular chain and more preferably a block copolymer in which the block components at both ends of the molecular chain are block components composed of the styrenic hard segment.
  • the polystyrene hard segment is not particularly limited, and examples thereof include polystyrene, poly ( ⁇ -methylstyrene), poly (o-methylstyrene), poly (m-methylstyrene), and poly (p-methylstyrene). Examples thereof include polystyrene polymers.
  • the soft segment is not particularly limited, and examples thereof include polyolefin polymers such as polyethylene, polypropylene, polybutylene, polybutadiene, and polyisoprene.
  • the copolymer used as the styrenic thermoplastic elastomer (A1, A2) is not particularly limited as long as it is a triblock or higher styrene block copolymer.
  • SBS styrene-butadiene-styrene block copolymer
  • SEBS Styrene-ethylene-butylene-styrene block copolymer
  • SIBS styrene-isoprene-butylene-styrene block copolymer
  • SIS styrene-isoprene-styrene block copolymer
  • SEPS styrene-ethylene-propylene -Styrene block copolymer
  • SEEPS styrene-ethylene-ethylene-propylene styrene block copolymer
  • SEBS styrene-ethylene-butylene-styrene block copolymer
  • SEPS styrene-ethylene-propylene-styrene block copolymer
  • SEEPS styrene-ethylene-propylene-styrene block copolymer
  • the styrenic thermoplastic elastomer has a network-like network structure formed by a plurality of aggregation domains formed by the interaction of the styrene hard segments and an olefinic soft segment connecting the plurality of aggregation domains. Therefore, it is considered that the function as an elastic body is expressed. Moreover, such a network-like network structure is considered to have a function of holding an oil agent (that is, a hydrocarbon oil (B) and a silicone oil (C)), which will be described later, while appropriately releasing it.
  • an oil agent that is, a hydrocarbon oil (B) and a silicone oil (C)
  • the block copolymer is preferably 10 to 50% by mass of a styrenic block component and about 50 to 90% by mass of an olefinic block component, more preferably 15 to 40% by mass of a styrenic block component and 60 to 85% by mass.
  • % Olefinic block component particularly preferably 18 to 35% by mass of styrenic block component and 65 to 82% by mass of olefinic block component.
  • the amount of the styrenic block component exceeds 50% by mass, the amount of the olefinic block component that holds the oil agent or the like decreases, so the amount of the oil agent or the like that can be held decreases, and the styrene hard segment Since the amount of the aggregation domain formed by this increases, the gel after being applied to the top sheet becomes hard, and there is a possibility that the feeling of wear may be inferior.
  • the styrene thermoplastic elastomer mixture (A) is composed of a mixture of two types of styrene thermoplastic elastomers (A1, A2) having different weight average molecular weights.
  • One of the two types of styrenic thermoplastic elastomers (A1, A2) (hereinafter referred to as “low molecular weight styrenic thermoplastic elastomer (A1)”).
  • the weight average molecular weight is in the range of 100,000 to less than 180,000, preferably in the range of 100,000 to 150,000. When the weight average molecular weight is less than 100,000, the hardness and elongation of the gel after being applied to the top sheet are lowered.
  • the other styrene thermoplastic elastomer (A2) (hereinafter sometimes referred to as “high molecular weight styrene thermoplastic elastomer (A2)”) has a weight average molecular weight in the range of 180,000 to 300,000. Preferably, it is in the range of 220,000 to 280,000. When this weight average molecular weight exceeds 300,000, tackiness tends to occur on the surface of the gel.
  • the styrenic thermoplastic elastomer mixture (A) has a dispersity (that is, a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw / Mn)) within a range of 1.25 to 1.60. Yes, preferably in the range of 1.35 to 1.55.
  • a dispersity that is, a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw / Mn)
  • Mw weight average molecular weight
  • Mn number average molecular weight
  • the gel after application to the top sheet becomes inhomogeneous due to the difference in cooling and solidifying time of the two types of styrene-based thermoplastic elastomers (A1, A2).
  • the physical properties such as elongation and brittleness are reduced.
  • the weight average molecular weight (Mw) of the two types of styrenic thermoplastic elastomers (A1, A2) and the styrenic thermoplastic elastomer mixture (A), and the degree of dispersion of the styrenic thermoplastic elastomer mixture (A) (Mw / Mn) can be determined by polystyrene conversion by GPC measurement under the following conditions using tetrahydrofuran (THF) as a mobile phase.
  • THF tetrahydrofuran
  • the gel composition contains a mixture of two types of styrenic thermoplastic elastomers (A1, A2) having different weight average molecular weights.
  • the blending ratio of the low molecular weight styrene-based thermoplastic elastomer (A1) exceeds 95 in the mass ratio, the hardness and elongation of the gel after application to the top sheet becomes insufficient, and the blending ratio is less than 50. Then, tackiness is likely to occur on the surface of the gel.
  • the gel composition further includes a hydrocarbon oil (B) having a kinematic viscosity at 37.8 ° C. of 5 to 50 mm 2 / s.
  • the hydrocarbon oil (B) is not particularly limited as long as it is a compound composed of carbon and hydrogen, and may have a linear, branched or cyclic structure, or may have a saturated or unsaturated bond.
  • Examples of the hydrocarbon oil (B) include olefinic hydrocarbons (alkenes containing one double bond), paraffinic hydrocarbons (alkanes containing neither a double bond nor a triple bond), or acetylene hydrocarbons (triple).
  • Alkyne having one bond hydrocarbons having two or more double bonds and / or triple bonds, and cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons. More specifically, hydrogenated polyisobutene, liquid paraffin, squalane, squalene and the like can be mentioned. Therefore, it can be preferably used.
  • the hydrocarbon oil (B) has a kinematic viscosity at 37.8 ° C. in the range of 5 to 50 mm 2 / s, preferably in the range of 10 to 30 mm 2 / s, and more preferably in the range of 10 to 20 mm 2 / s. Is within the range. If the kinematic viscosity is less than 5 mm 2 / s, the hydrocarbon oil (B) is likely to volatilize during the production of the gel composition, and there is a possibility that the physical properties of the gel after application to the top sheet may vary. .
  • kinematic viscosity exceeds 50 mm 2 / s, the gel after being applied to the top sheet becomes hard and tackiness is likely to occur.
  • the kinematic viscosity of the hydrocarbon oil (B) is measured at a test temperature of 37.8 ° C. using a Cannon Fenceke reverse flow viscometer according to “5. Kinematic viscosity test method” of JIS K 2283: 2000. Can be obtained.
  • the blending amount of the hydrocarbon oil (B) is in the range of 500 to 4800 parts by weight, preferably in the range of 800 to 3000 parts by weight, with respect to 100 parts by weight of the styrenic thermoplastic elastomer mixture (A). More preferably, it is in the range of 1000 to 1500 parts by mass.
  • this blending amount is less than 500 parts by mass, the gel after being applied to the top sheet becomes hard, and the elongation also decreases.
  • this compounding quantity exceeds 4800 mass parts, the said gel will become too soft and it will become difficult to maintain the shape of the said gel.
  • the gel composition further includes a silicone oil (C) having a kinematic viscosity at 25 ° C. of 50 to 200 mm 2 / s.
  • the silicone oil (C) is not particularly limited as long as it is a silicone oil, and any known silicone oil can be used.
  • the silicone oil (C) include diorganopolysiloxanes such as dimethylpolysiloxane and methylphenylpolysiloxane, and cyclic siloxanes such as cyclopentasiloxane.
  • dimethylpolysiloxane can be preferably used because it can impart appropriate sustained release properties such as oils to the gel composition.
  • the silicone oil (C) has a kinematic viscosity at 25 ° C. in the range of 50 to 200 mm 2 / s, preferably in the range of 70 to 150 mm 2 / s, more preferably in the range of 80 to 120 mm 2 / s. It is. If the kinematic viscosity is less than 50 mm 2 / s, the silicone oil (C) is likely to volatilize during the production of the gel composition, and there is a possibility that the physical properties of the gel after application to the top sheet may vary. On the other hand, when the kinematic viscosity exceeds 200 mm 2 / s, the sustained release amount of the oil agent or the like decreases, and tackiness tends to occur.
  • the kinematic viscosity of the silicone oil (C) is also measured at a test temperature of 25 ° C. using a Canon Fenceke reverse flow viscometer according to “5. Kinematic viscosity test method” of JIS K 2283: 2000. Obtainable.
  • the blending amount of the silicone oil (C) is in the range of 20 to 60 parts by mass, preferably in the range of 30 to 50 parts by mass with respect to 100 parts by mass of the styrenic thermoplastic elastomer mixture (A). .
  • the blending amount is less than 20 parts by mass, the sustained release amount of the oil agent or the like decreases.
  • the sustained release amount of the oil agent or the like is excessively increased, and the surface of the gel becomes oily.
  • the gel composition contains a stabilizer, an antioxidant (for example, BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), propyl gallate, etc.), Light stabilizer, colorant, pigment (for example, titanium oxide, zinc oxide, etc.), fragrance, inorganic powder (for example, alumina, talc, mica, calcium carbonate, clay, etc.), organic powder (for example, PE, PP, etc.) Any additive such as a silicone resin powder or the like or other components may be included within a range not impairing the object of the present invention.
  • an antioxidant for example, BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), propyl gallate, etc.
  • Light stabilizer for example, colorant, pigment (for example, titanium oxide, zinc oxide, etc.), fragrance, inorganic powder (for example, alumina, talc, mica, calcium carbonate, clay, etc.),
  • oils having skin care action for example, jojoba oil, camellia oil, etc.
  • vitamins various amino acids, peptides, zeolite, cholesterol, hyaluronic acid, lecithin, ceramide, skin astringent
  • examples include acne agents, anti-wrinkle agents, anti-cellulite agents, whitening agents, antibacterial agents, anti-fungal agents, anti-inflammatory ingredients, pH adjusters, and moisturizers.
  • the gel composition can be produced by mixing the above-described various blending components using any known mixing means.
  • the gel composition can be produced by supplying the above-mentioned various blending components simultaneously or in any order into a mixing apparatus and melt-mixing in the mixing apparatus.
  • the means for melting and mixing There is no particular limitation on the means for melting and mixing, and any known means can be adopted.
  • the means using is mentioned.
  • the gel composition has moderate hardness and elongation, and also has a sustained release property, it can be coated or molded while suppressing adhesion to various coating devices or molding devices. Furthermore, since the gel composition contains a larger amount of a low molecular weight styrene thermoplastic elastomer than a high molecular weight styrene thermoplastic elastomer, the gel composition exhibits appropriate fluidity even at a temperature of around 100 ° C. Therefore, lamination or integral molding by coating or the like can be easily performed on various base materials such as nonwoven fabric, paper, cloth, olefin resin, and PET resin.
  • FIG. 1 is a plan view showing an absorbent article (a sanitary napkin) according to one embodiment of the present invention.
  • a sanitary napkin 1 shown in FIG. 1 has a liquid-permeable top sheet 2 positioned on the skin surface side of the wearer and a liquid-impermeable surface positioned on the clothes side (that is, the side opposite to the skin surface side).
  • a back sheet (not shown) and a top sheet 2 and an absorbent body 3 positioned between the back sheets are provided.
  • the sanitary napkin 1 shown in FIG. 1 includes a side sheet 4 and an embossed portion 5.
  • the top sheet 2 includes a plurality of cocoon-shaped gel-like compositions 6 applied in parallel to each other along the longitudinal direction of the sanitary napkin 1 on the surface on the skin side.
  • the coating pattern of the gel composition is not limited to this.
  • FIG. 2 is a plan view showing an absorbent article (a sanitary napkin) according to another embodiment of the present invention.
  • the sanitary napkin 1 shown in FIG. 2 includes a plurality of dot-like gel-like compositions 6 applied in a zigzag pattern on the surface of the top sheet 2 on the skin surface side.
  • the gel composition is preferably applied at an area ratio of 1 to 50% of the region, and 3 to 40% of the region. It is more preferable that the coating is performed at an area ratio of 5 to 30% of the area.
  • the gel-like composition is applied at an area ratio of less than 1% of the region, the amount of the gel-like composition on the top sheet is small, and thus the effect exhibited by the gel-like composition is sufficient. It cannot be demonstrated.
  • the region on the top sheet to which the gel composition is applied does not absorb excrement, There is a possibility that the area where the excrement can be absorbed in the top sheet is reduced, and the absorbent performance of the absorbent article may be lowered.
  • the topsheet where the gel composition is applied the gel composition preferably is 1 ⁇ 30g / m 2, more preferably 2 ⁇ 20g / m 2, particularly preferably 3 ⁇ 10g / m 2 Including the content of
  • content of the said gel-like composition is calculated
  • the content of the gel composition is cut out from a plurality of absorbent articles so that the total area of the sample exceeds 100 cm 2, and the above ( 2) perform the measurement task to (6), employing the average value of the obtained content G BS from each measuring operation.
  • the coating method of the gel composition is not particularly limited, and any known coating method can be adopted.
  • the gel composition may be produced by using an extrusion apparatus equipped with a discharge nozzle; a non-contact type coater such as a spiral coater, curtain coater, spray coater or dip coater; a top sheet using a coating apparatus such as a contact type coater. Can be applied on top.
  • the gel composition may be applied when a top sheet material such as a nonwoven fabric is manufactured, or may be applied on the top sheet in an absorbent article manufacturing line.
  • the gel composition is preferably applied on the top sheet in an absorbent article production line, and in particular, from the viewpoint of suppressing contamination due to falling off of oil or the like. It is preferable to apply on the top sheet in a downstream process of the production line (for example, immediately before a process of individually packing products).
  • the liquid-permeable top sheet may be a sheet-like fiber structure such as a nonwoven fabric or a woven fabric.
  • the fibers constituting the nonwoven fabric or woven fabric include natural fibers, chemical fibers, and the like. More specifically, cellulose fibers such as pulverized pulp and cotton; rayon; And regenerated cellulose such as fibrillar rayon; semi-synthetic cellulose such as acetate and triacetate; thermoplastic hydrophobic chemical fiber; and thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment.
  • examples of the thermoplastic hydrophobic chemical fiber include single fibers made of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and the like, fibers made of PE and PP graft polymers, and the like.
  • nonwoven fabric examples include air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, needle punch nonwoven fabric, melt blown nonwoven fabric, and combinations thereof (for example, SMS).
  • the nonwoven fabric or the woven fabric is subjected to a hydrophilic treatment.
  • the hydrophilization treatment method is not particularly limited, but a method of coating the surface of the nonwoven fabric or woven fabric with a hydrophilizing agent, a method of coating the surface of fibers constituting the nonwoven fabric or woven fabric, a nonwoven fabric or Examples thereof include a method of adding a hydrophilizing agent to a synthetic resin that is a raw material for fibers constituting the woven fabric.
  • a film comprising PE, PP, etc., a resin film having air permeability, a laminate in which a resin film having air permeability is bonded to a nonwoven fabric such as spunbond or spunlace, SMS And the like, and the like.
  • a low density polyethylene (LDPE) film having a basis weight of about 15 to about 30 g / m 2 is preferable.
  • the absorbent article may include a second sheet between the liquid-permeable top sheet and the absorbent body.
  • the second sheet the same sheet as the liquid-permeable top sheet can be used.
  • the absorber is not particularly limited, and any absorber known in the art can be used.
  • any absorber known in the art can be used.
  • the absorbent core include hydrophilic fibers, and more specifically, cellulose such as pulverized pulp and cotton; regenerated cellulose such as rayon and fibril rayon; semisynthetic cellulose such as acetate and triacetate; Examples thereof include particulate polymer; fibrous polymer; thermoplastic hydrophobic chemical fiber; hydrophilized thermoplastic hydrophobic chemical fiber; and any combination thereof.
  • the core wrap is not particularly limited as long as the core wrap has liquid permeability that allows liquid such as body fluid discharged from the human body to permeate, and has barrier properties that do not allow permeation of the constituent components of the absorbent core included.
  • a sheet-like fiber structure such as a woven fabric or a non-woven fabric can be used.
  • examples of the woven fabric and non-woven fabric include natural fibers, chemical fibers, and tissues.
  • the absorbent include a substantially sheet-like structure formed from an absorbent sheet or a polymer sheet, and the thickness is preferably in the range of 0.3 to 5.0 mm.
  • the absorbent sheet or polymer sheet can be used without particular limitation as long as it is used for general absorbent articles such as sanitary napkins.
  • a preferred embodiment of the absorbent article of the present invention is not particularly limited as long as it is an article for absorbing excreta discharged from the human body, but for example, sanitary napkins, panty liners, diapers, urine collection pads, etc. Is mentioned.
  • the present invention also relates to a nonwoven fabric.
  • the nonwoven fabric of this invention has the above-mentioned gel-like composition in at least one part of the area
  • the composition of the gel composition used for the nonwoven fabric of the present invention is as described above. Since the nonwoven fabric of the present invention has a gel composition with less tackiness while having moderate hardness, elongation and sustained release of the active ingredient in at least a part of the region in contact with the user's skin, The active ingredient can be continuously released to the wearer's skin while having a good wearing feeling and easy handling.
  • the gel composition is disposed in at least a part of a region in contact with the user's skin, for example, in a hook shape or a dot shape.
  • the product containing the nonwoven fabric include a mask and a wet tissue.
  • Styrenic thermoplastic elastomer A1, A2
  • Low molecular weight styrenic thermoplastic elastomer A1
  • Clayton G1652 styrene-ethylene-butylene-styrene block copolymer (SEBS) having a Mw of 80,000, manufactured by Kraton Polymer Co., Ltd.
  • Septon 4033 styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS) with a Mw of 100,000, manufactured by Kuraray Co., Ltd.
  • Septon 8004 styrene-ethylene-butylene-styrene block copolymer (SEBS) with Mw of 110,000, manufactured by Kuraray Co., Ltd.
  • the absorbent articles of Examples 1 to 6 showed good results in comprehensive evaluation.
  • the gel composition No. used was used for the absorbent articles of Examples 1 to 4.
  • 1-1 to 1-4 were excellent in all of hardness, elongation and sustained release properties, and high evaluation results were obtained in the sensory evaluation of the absorbent article.
  • the absorbent article of Comparative Example 1 was the gel composition No. used. Since 2-1 contained only the low molecular weight styrene thermoplastic elastomer (A1) as the styrene thermoplastic elastomer, the gel became hard and brittleness was also observed.
  • A1 low molecular weight styrene thermoplastic elastomer
  • the absorbent article of Comparative Example 2 is the gel composition No. used. 2-2 contained only a high molecular weight styrene-based thermoplastic elastomer (A2) as a styrene-based thermoplastic elastomer, but although the gel elongation was excellent, the sustained release amount increased and the sensory evaluation of the absorbent article In the case, tackiness was confirmed.
  • A2 high molecular weight styrene-based thermoplastic elastomer
  • the absorbent article of Comparative Example 3 is the gel composition No. used. Since the blending amount of the hydrocarbon oil (B) in 2-3 was less than 500 parts by mass, the gel became hard, the sustained release amount was small, and the wettability was poor in the sensory evaluation of the absorbent article.
  • the absorbent article of Comparative Example 4 has the gel composition No. used. Since the kinematic viscosity at 37.8 ° C. of the hydrocarbon oil (B) 2-4 was larger than 50 mm 2 / s, the sustained release amount was small, and tackiness was confirmed in the sensory evaluation of the absorbent article.
  • the absorbent article of Comparative Example 5 is the gel composition No. used.
  • the absorbent article of Comparative Example 6 is the gel composition No. used. Since the dispersity of the styrene-based thermoplastic elastomer mixture (A) in 2-6 was greater than 1.60, the gel elongation deteriorated and brittleness was also observed.
  • the absorbent article of Comparative Example 7 was the gel composition No. used. Since the kinematic viscosity of the 2-7 silicone oil (C) at 25 ° C. was larger than 200 mm 2 / s, the sustained release amount was small, and tackiness was confirmed in the sensory evaluation of the absorbent article.
  • the absorbent article of Comparative Example 8 is the gel composition No. used. Since 2-8 did not contain silicone oil (C), the sustained release amount was extremely small, and the wettability was poor in the sensory evaluation of the absorbent article.
  • One aspect (aspect 1) of the present invention is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body positioned between the top sheet and the back sheet.
  • the top sheet includes a gel-like composition on the surface on the skin surface side, and the gel-like composition has a weight average molecular weight of 100,000 or more and less than 180,000 and a block co-polymer weight of triblock or more.
  • a styrene-based thermoplastic elastomer (A1) composed of a coalescence and a styrene-based thermoplastic elastomer (A2) composed of a block copolymer having a weight average molecular weight of 180,000 to 300,000 and having a triblock or more, (A1 ) / (A2) 95/5 to 50/50 and a molecular weight dispersity (Mw / Mn) of 1.25 to 1.60.
  • the block copolymer in the absorbent article according to aspect 1, has two or more block components composed of styrene hard segments in the molecular chain.
  • the block components at least at both ends in the molecular chain of the block copolymer are block components composed of the styrenic hard segment. .
  • the block copolymer is a styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene.
  • the hydrocarbon oil (B) is a group consisting of hydrogenated polyisobutene, liquid paraffin, squalane and squalene. Is at least one selected from
  • the silicone oil (C) is diorganopolysiloxane or cyclic siloxane.
  • the silicone oil (C) comprises dimethylpolysiloxane, methylphenylpolysiloxane, and cyclopentasiloxane. At least one selected from the group.
  • the gel composition in the absorbent article according to any one of Aspects 1 to 7, is formed on the skin surface side surface of the top sheet in a plan view. It is coated in a bowl or dot shape.
  • the absorbent article in the absorbent article according to any one of Aspects 1 to 8, is a sanitary napkin, a panty liner, a diaper, or a urine absorbing pad.
  • Yet another embodiment (embodiment 10) of the present invention is a non-woven fabric having a gel composition on the surface, the gel composition having a weight average molecular weight of 100,000 or more and less than 180,000, and triblock or more.

Abstract

The purpose of the present invention is to provide an absorbent article that includes in the surface thereof a gel composition that has moderate hardness, that spreads, that releases an active component in a controlled manner, and that is not sticky. An absorbent article (1) according to the present invention includes a gel composition in a skin-side surface of a top sheet (2), the gel composition including a low molecular weight styrene thermoplastic elastomer (A1) and a high molecular weight styrene thermoplastic elastomer (A2) in a mass ratio of (A1)/(A2) = 95/5-50/50, the degree of dispersion (Mw/Mn) of molecular weight being 1.25-1.60. For 100 parts by mass of styrene thermoplastic elastomer (A), the gel composition contains 500-4800 parts by mass of a hydrocarbon oil (B) that has a kinetic viscosity of 5-50 mm2/s at 37.8℃ and 20-60 parts by mass of a silicone oil (C) that has a kinetic viscosity of 50-200 mm2/s at 25℃.

Description

吸収性物品Absorbent articles
 本発明は、適度な硬さ、伸び及び有効成分の徐放性を有しつつ、タック性の少ないゲル状組成物を表面に含む吸収性物品に関する。また、本発明は、適度な硬さ、伸び及び有効成分の徐放性を有しつつ、タック性の少ないゲル状組成物を表面に有する不織布に関する。 The present invention relates to an absorbent article having a gel-like composition with a small tackiness on the surface while having an appropriate hardness, elongation and sustained release of active ingredients. The present invention also relates to a non-woven fabric having a gel-like composition having a small tackiness on the surface while having an appropriate hardness, elongation and sustained release of active ingredients.
 生理用ナプキン、パンティーライナー、おむつ等の吸収性物品では、長年積み重ねられてきた技術開発により吸収性能等の基本的性能が向上し、以前と比較して、経血や尿などの***物を吸収した後に、漏れ等が生じることが少なくなってきており、現在は、更なる高機能化、例えば、肌着に近い着用感を有すること、柔軟性及びクッション性に優れることなどが求められている。 Absorbent articles such as sanitary napkins, panty liners, and diapers have improved their basic performance such as absorption performance through technological developments accumulated over many years, and absorb excrement such as menstrual blood and urine compared to before After that, leaks and the like are less likely to occur, and at present, there is a demand for further enhancement of functionality, for example, having a feeling of wearing close to underwear, excellent flexibility and cushioning.
 例えば、特許文献1には、トップシートの外表面の少なくとも一部に、20℃で半固体又は固体であり部分的に着用者の肌へ移動可能である有効量のローションコーティングを含む吸収性物品が開示されている。さらに、特許文献1によれば、前記ローションコーティングは、(i)10~95%が、20℃で可塑性又は流動性コンシステンシーを有し、石油ベースのエモリエント剤、脂肪酸エステルエモリエント剤、アルキルエトキシレートエモリエント剤、及びこれらの混合物から選択された1つを含む、実質的に水分を含まないエモリエント剤であり、(ii)5~90%が、エモリエント剤をトップシートの外表面上に固定することを可能とする固定化物質であって、少なくとも35℃、好ましくは少なくとも40℃の融点を有し、ポリヒドロキシ脂肪酸エステル、ポリヒドロキシ脂肪酸アミド、C14-C22脂肪アルコール、C12-C22脂肪酸、C12-C22脂肪アルコールエトキシレート、及びそれらの混合物から選ばれる前記固定化物質であるとされている。 For example, Patent Document 1 discloses an absorbent article including an effective amount of a lotion coating on at least a part of the outer surface of a top sheet that is semisolid or solid at 20 ° C. and partially movable to the skin of the wearer. Is disclosed. Further, according to Patent Document 1, the lotion coating comprises (i) 10 to 95% having a plasticity or fluidity consistency at 20 ° C., a petroleum-based emollient, a fatty acid ester emollient, an alkyl ethoxylate. A substantially moisture-free emollient comprising one selected from an emollient and mixtures thereof, (ii) 5 to 90% fix the emollient on the outer surface of the topsheet Immobilizing substance which has a melting point of at least 35 ° C., preferably at least 40 ° C., and is a polyhydroxy fatty acid ester, polyhydroxy fatty acid amide, C 14 -C 22 fatty alcohol, C 12 -C 22 fatty acid , C 12 -C 22 fatty alcohol ethoxylates, and in the immobilization material selected from mixtures thereof Lutosa has been.
 また、特許文献2には、液透過性の表面シート、液不透過性又は撥水性の裏面シート及びこれら両シート間に配置された吸収体を備えた吸収性物品であって、前記表面シートは、相互に密度が異なる高密度部と低密度部とを有する不織布製シートからなり、前記高密度部及び前記低密度部が前記表面シートの平面方向に分布しており、前記低密度部に、前記高密度部より多い量のスキンケア剤が適用された吸収性物品が開示されている。さらに、特許文献2の段落[0069]には、有効成分のジアミド誘導体と、ステアリルアルコールとを5:5の質量比で含むスキンケア剤が開示されている。 Patent Document 2 discloses an absorbent article including a liquid-permeable top sheet, a liquid-impermeable or water-repellent back sheet, and an absorbent body disposed between the two sheets. A non-woven sheet having a high-density part and a low-density part having different densities from each other, the high-density part and the low-density part are distributed in the plane direction of the top sheet, and the low-density part, An absorbent article to which a larger amount of skin care agent than the high density part is applied is disclosed. Furthermore, paragraph [0069] of Patent Document 2 discloses a skin care agent containing a diamide derivative as an active ingredient and stearyl alcohol at a mass ratio of 5: 5.
 特許文献1の吸収性物品は、35℃以上の融点を有する固定化物質が、ローションコーティング内において室温(25℃)で結晶化し、前記ローションコーティングの粘度を増大させることにより、前記ローションコーティングを不動化させる作用を有するものである。また、特許文献2の吸収性物品は、添加されるステアリルアルコールが58℃の融点を有するため、特許文献1の吸収性物品と同様に、スキンケア剤を不動化させる作用を有すると推察される。 In the absorbent article of Patent Document 1, an immobilizing substance having a melting point of 35 ° C. or higher is crystallized in a lotion coating at room temperature (25 ° C.), thereby increasing the viscosity of the lotion coating, thereby immobilizing the lotion coating. It has the effect | action which makes it. Moreover, since the stearyl alcohol added has the melting point of 58 degreeC, the absorbent article of patent document 2 is guessed to have the effect | action which immobilizes a skin care agent similarly to the absorbent article of patent document 1.
 このようにローションコーティング又はスキンケア剤を高粘度化すると、有効成分がその内部に閉じ込められてしまい、該有効成分の放出が必要以上に抑制されてしまうため、有効成分の徐放性という点で満足のいくものが得られなくなる。また、高粘度のローションコーティング又はスキンケア剤は、吸収性物品の表面シートに適用される材料(すなわち、肌に直接接触する材料)としては、柔軟性や伸びが不十分であるため、着用感にも劣る虞がある。 When the viscosity of the lotion coating or skin care agent is increased in this way, the active ingredient is confined in the inside, and the release of the active ingredient is suppressed more than necessary, which is satisfactory in terms of sustained release of the active ingredient. You can't get anything. In addition, a high-viscosity lotion coating or skin care agent is insufficient in flexibility and elongation as a material applied to the top sheet of the absorbent article (that is, a material that comes into direct contact with the skin). May be inferior.
 一方、特許文献3には、ゲルの硬さや伸びなどに関して遅延弾性を示すゲル状組成物が開示されている。この組成物は、数平均分子量が13万以上の高分子量のトリブロック型スチレン系熱可塑性エラストマーと、数平均分子量が10万以下の低分子量のトリブロック型スチレン系熱可塑性エラストマーと、軟化剤とからなるゲルエラストマーであり、高分子量のトリブロック型スチレン系エラストマーが多量の軟化剤を吸収保持することにより組成物の柔軟性が確保されつつ、低分子量のトリブロック型スチレン系エラストマーを含有することにより遅延弾性が付与されているものであるが、このような組成物においても、ゲル表面のタック性や除放性に関しては、未だ不十分なものであった。 On the other hand, Patent Document 3 discloses a gel-like composition exhibiting delayed elasticity with respect to gel hardness and elongation. The composition comprises a high molecular weight triblock styrene thermoplastic elastomer having a number average molecular weight of 130,000 or more, a low molecular weight triblock styrene thermoplastic elastomer having a number average molecular weight of 100,000 or less, a softener, A gel elastomer comprising a high molecular weight triblock type styrene elastomer that absorbs and retains a large amount of a softening agent to ensure the flexibility of the composition and contains a low molecular weight triblock type styrene elastomer. However, even in such a composition, the tackiness and controlled release properties of the gel surface were still insufficient.
特表平10-509896号公報Japanese National Patent Publication No. 10-509896 特開2011-131044号公報JP 2011-131044 A 特開2001-151980号公報JP 2001-151980 A
 そこで、本発明は、適度な硬さ、伸び及び有効成分の徐放性を有しつつ、タック性の少ないゲル状組成物を表面に含む吸収性物品を提供することを目的とする。また、本発明は、適度な硬さ、伸び及び有効成分の徐放性を有しつつ、タック性の少ないゲル状組成物を表面に有する不織布を提供することも目的とする。 Therefore, an object of the present invention is to provide an absorbent article having a gel composition with less tackiness on the surface while having appropriate hardness, elongation, and sustained release of active ingredients. Another object of the present invention is to provide a non-woven fabric having a gel-like composition having a small tackiness on the surface while having an appropriate hardness, elongation and sustained release of active ingredients.
 本発明は、液透過性のトップシートと、液不透過性のバックシートと、前記トップシート及び前記バックシートの間に位置する吸収体と、を有する吸収性物品に関し、前記トップシートは、その肌面側の表面にゲル状組成物を含み、前記ゲル状組成物は、重量平均分子量が10万以上18万未満であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A1)と、重量平均分子量が18万以上30万以下であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A2)とを、(A1)/(A2)=95/5~50/50の質量比で含み、且つ分子量の分散度(Mw/Mn)が1.25~1.60である、スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を500~4800質量部と、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を20~60質量部とを含有するものである。 The present invention relates to an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and the absorbent body positioned between the top sheet and the back sheet, the top sheet comprising: A gel-like composition is included on the surface of the skin surface side, and the gel-like composition has a weight average molecular weight of 100,000 or more and less than 180,000, and is composed of a block copolymer of triblock or more. A1) and a styrene-based thermoplastic elastomer (A2) having a weight average molecular weight of 180,000 or more and 300,000 or less and comprising a block copolymer of triblock or more, (A1) / (A2) = 95/5 To 100 parts by mass of the styrene-based thermoplastic elastomer mixture (A) having a mass ratio of ˜50 / 50 and a molecular weight dispersity (Mw / Mn) of 1.25 to 1.60. And, a 500 to 4800 parts by kinematic viscosity 5 ~ 50mm 2 / s a hydrocarbon oil (B) at 37.8 ° C., silicone oil is a kinematic viscosity of 50 ~ 200mm 2 / s at 25 ° C. (C ) In an amount of 20 to 60 parts by mass.
 本発明によれば、適度な硬さ、伸び及び有効成分の徐放性を有しつつ、タック性の少ないゲル状組成物を表面に含む吸収性物品が提供される。 According to the present invention, there is provided an absorbent article having a gel composition with less tackiness on the surface while having appropriate hardness, elongation and sustained release of active ingredients.
図1は、本発明の実施形態の1つに従う吸収性物品を示す平面図である。FIG. 1 is a plan view showing an absorbent article according to one embodiment of the present invention. 図2は、本発明の別の実施形態に従う吸収性物品を示す平面図である。FIG. 2 is a plan view showing an absorbent article according to another embodiment of the present invention.
 本発明の吸収性物品について、以下に詳細に説明する。 The absorbent article of the present invention will be described in detail below.
 本発明の吸収性物品は、少なくとも、着用者の肌面側に位置する液透過性のトップシートと、衣服側(すなわち、着用者の肌面側とは反対側)に位置する液不透過性のバックシートと、前記トップシート及び前記バックシートの間に位置する吸収体とを有する積層構造体を含み、さらに、前記トップシートは、その肌面側の表面にゲル状組成物を含む。 The absorbent article of the present invention includes at least a liquid-permeable top sheet positioned on the wearer's skin side and a liquid-impermeable sheet positioned on the clothes side (that is, the side opposite to the wearer's skin side). And a laminated structure having the top sheet and an absorber positioned between the back sheet, and the top sheet further includes a gel composition on the skin surface side.
[ゲル状組成物]
 本発明において、前記ゲル状組成物は、重量平均分子量が10万以上18万未満であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A1)と、重量平均分子量が18万以上30万以下であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A2)とを、(A1)/(A2)=95/5~50/50の質量比で含み、且つ分子量の分散度(Mw/Mn)が1.25~1.60である、スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を500~4800質量部と、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を20~60質量部とを含有するものである。
[Gel composition]
In the present invention, the gel composition has a weight average molecular weight of 100,000 or more and less than 180,000, and a styrene-based thermoplastic elastomer (A1) made of a block copolymer of triblock or more, and a weight average molecular weight of 18 Styrene-based thermoplastic elastomer (A2) composed of a block copolymer of triblock or more and not less than 30,000 and not more than 300,000 in a mass ratio of (A1) / (A2) = 95/5 to 50/50 and the molecular weight dispersity (Mw / Mn) of 1.25 to 1.60 styrenic thermoplastic elastomer mixture (a) relative to 100 parts by weight, 37.8 kinematic viscosity at ℃ is 5 ~ 50 mm 2 / s hydrocarbon oil (B) and 500 to 4800 parts by weight is, the silicone oil (C) 20 ~ 60 parts by weight the kinematic viscosity of 50 ~ 200 mm 2 / s at 25 ° C. Those having.
 前記ゲル状組成物に用いるスチレン系熱可塑性エラストマー(A1,A2)は、ポリスチレン系ハードセグメントとソフトセグメントとを含むトリブロック以上のブロック共重合体であり、好ましくはスチレン系ハードセグメントからなるブロック成分を分子鎖中に2つ以上有するブロック共重合体であり、更に好ましくは分子鎖における少なくとも両末端のブロック成分が、前記スチレン系ハードセグメントからなるブロック成分であるブロック共重合体である。前記ポリスチレン系ハードセグメントとしては、特に制限されないが、例えば、ポリスチレン、ポリ(α-メチルスチレン)、ポリ(o-メチルスチレン)、ポリ(m-メチルスチレン)、ポリ(p-メチルスチレン)などのポリスチレン系ポリマーが挙げられる。また、前記ソフトセグメントとしては、特に制限されないが、例えば、ポリエチレン、ポリプロピレン、ポリブチレン、ポリブタジエン、ポリイソプレンなどのポリオレフィン系ポリマーが挙げられる。 The styrenic thermoplastic elastomer (A1, A2) used for the gel composition is a block copolymer of triblock or more containing a polystyrene hard segment and a soft segment, preferably a block component comprising a styrene hard segment. Is a block copolymer having two or more in the molecular chain, and more preferably a block copolymer in which the block components at both ends of the molecular chain are block components composed of the styrenic hard segment. The polystyrene hard segment is not particularly limited, and examples thereof include polystyrene, poly (α-methylstyrene), poly (o-methylstyrene), poly (m-methylstyrene), and poly (p-methylstyrene). Examples thereof include polystyrene polymers. The soft segment is not particularly limited, and examples thereof include polyolefin polymers such as polyethylene, polypropylene, polybutylene, polybutadiene, and polyisoprene.
 前記スチレン系熱可塑性エラストマー(A1,A2)として用いる共重合体は、トリブロック以上のスチレン系ブロック共重合体であれば、特に制限されないが、例えば、スチレン-ブタジエン-スチレンブロック共重合体(SBS)、スチレン-エチレン-ブチレン-スチレンブロック共重合体(SEBS)、スチレン-イソプレン-ブチレン-スチレンブロック共重合体(SIBS)、スチレン-イソプレン-スチレンブロック共重合体(SIS)、スチレン-エチレン-プロピレン-スチレンブロック共重合体(SEPS)、スチレン-エチレン-エチレン-プロピレンスチレンブロック共重合体(SEEPS)、及びこれら2種以上の組み合せなどが挙げられる。これらの中でも、トップシートに適用した後のゲルの硬さや伸び等の点から、スチレン-エチレン-ブチレン-スチレンブロック共重合体(SEBS)、スチレン-エチレン-プロピレン-スチレンブロック共重合体(SEPS)及びスチレン-エチレン/エチレン-プロピレン-スチレンブロック共重合体(SEEPS)が好ましい。前記スチレン系熱可塑性エラストマー(A1,A2)としてジブロック共重合体を用いた場合は、スチレン系ハードセグメントの相互作用(π-πスタッキング)が弱くなるため、前記ゲルの硬さや伸びが十分に得られない虞がある。なお、前記スチレン系熱可塑性エラストマーは、前記スチレン系ハードセグメントの相互作用により形成される複数の凝集ドメインと、該複数の凝集ドメインを連結するオレフィン系ソフトセグメントとによって網目状のネットワーク構造が形成されるため、弾性体としての機能を発現するものと考えられる。また、このような網目状のネットワーク構造は、後述する油剤(すなわち、炭化水素油(B)及びシリコーンオイル(C))等を、適度に徐放させつつ保持する機能を有するものと考えられる。 The copolymer used as the styrenic thermoplastic elastomer (A1, A2) is not particularly limited as long as it is a triblock or higher styrene block copolymer. For example, styrene-butadiene-styrene block copolymer (SBS) ), Styrene-ethylene-butylene-styrene block copolymer (SEBS), styrene-isoprene-butylene-styrene block copolymer (SIBS), styrene-isoprene-styrene block copolymer (SIS), styrene-ethylene-propylene -Styrene block copolymer (SEPS), styrene-ethylene-ethylene-propylene styrene block copolymer (SEEPS), and combinations of two or more thereof. Among these, styrene-ethylene-butylene-styrene block copolymer (SEBS) and styrene-ethylene-propylene-styrene block copolymer (SEPS) from the viewpoint of gel hardness and elongation after application to the top sheet Styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS) is preferred. When a diblock copolymer is used as the styrenic thermoplastic elastomer (A1, A2), the styrenic hard segment interaction (π-π stacking) is weakened, so that the gel has sufficient hardness and elongation. There is a possibility that it cannot be obtained. The styrenic thermoplastic elastomer has a network-like network structure formed by a plurality of aggregation domains formed by the interaction of the styrene hard segments and an olefinic soft segment connecting the plurality of aggregation domains. Therefore, it is considered that the function as an elastic body is expressed. Moreover, such a network-like network structure is considered to have a function of holding an oil agent (that is, a hydrocarbon oil (B) and a silicone oil (C)), which will be described later, while appropriately releasing it.
 前記ブロック共重合体は、好ましくは10~50質量%のスチレン系ブロック成分と約50~90質量%のオレフィン系ブロック成分、更に好ましくは15~40質量%のスチレン系ブロック成分と60~85質量%のオレフィン系ブロック成分、特に好ましくは18~35質量%のスチレン系ブロック成分と65~82質量%のオレフィン系ブロック成分を含む。スチレン系ブロック成分の量が10質量%を下回ると、前記凝集ドメインを形成するスチレン系ブロック成分の量が少なくなるので、前記スチレン系熱可塑性エラストマーが上述の網目状のネットワーク構造を形成し難くなる。一方、スチレン系ブロック成分の量が50質量%を超えると、前記油剤等を保持するオレフィン系ブロック成分の量が少なくなるので、保持できる油剤等の量が少なくなり、また、前記スチレン系ハードセグメントにより形成される凝集ドメインの量が多くなるので、トップシートに適用した後のゲルが硬くなり、着用感が劣る虞がある。 The block copolymer is preferably 10 to 50% by mass of a styrenic block component and about 50 to 90% by mass of an olefinic block component, more preferably 15 to 40% by mass of a styrenic block component and 60 to 85% by mass. % Olefinic block component, particularly preferably 18 to 35% by mass of styrenic block component and 65 to 82% by mass of olefinic block component. When the amount of the styrenic block component is less than 10% by mass, the amount of the styrenic block component that forms the agglomeration domain decreases, so that the styrenic thermoplastic elastomer is difficult to form the network network structure described above. . On the other hand, when the amount of the styrenic block component exceeds 50% by mass, the amount of the olefinic block component that holds the oil agent or the like decreases, so the amount of the oil agent or the like that can be held decreases, and the styrene hard segment Since the amount of the aggregation domain formed by this increases, the gel after being applied to the top sheet becomes hard, and there is a possibility that the feeling of wear may be inferior.
 本発明において、スチレン系熱可塑性エラストマー混合物(A)は、重量平均分子量の異なる2種類のスチレン系熱可塑性エラストマー(A1,A2)の混合物からなる。 In the present invention, the styrene thermoplastic elastomer mixture (A) is composed of a mixture of two types of styrene thermoplastic elastomers (A1, A2) having different weight average molecular weights.
 前記2種類のスチレン系熱可塑性エラストマー(A1,A2)のうちの一方のスチレン系熱可塑性エラストマー(A1)(以下、「低分子量のスチレン系熱可塑性エラストマー(A1)」と記すことがある。)は、重量平均分子量が10万以上18万未満の範囲内であり、好ましくは10万~15万の範囲内である。この重量平均分子量が10万未満であると、トップシートに適用した後のゲルの硬さ及び伸びが低くなる。また、他方のスチレン系熱可塑性エラストマー(A2)(以下、「高分子量のスチレン系熱可塑性エラストマー(A2)」と記すことがある。)は、重量平均分子量が18万以上30万以下の範囲内であり、好ましくは22万~28万の範囲内である。この重量平均分子量が30万を超えると、前記ゲルの表面にタック性が生じ易くなる。 One of the two types of styrenic thermoplastic elastomers (A1, A2) (hereinafter referred to as “low molecular weight styrenic thermoplastic elastomer (A1)”). The weight average molecular weight is in the range of 100,000 to less than 180,000, preferably in the range of 100,000 to 150,000. When the weight average molecular weight is less than 100,000, the hardness and elongation of the gel after being applied to the top sheet are lowered. The other styrene thermoplastic elastomer (A2) (hereinafter sometimes referred to as “high molecular weight styrene thermoplastic elastomer (A2)”) has a weight average molecular weight in the range of 180,000 to 300,000. Preferably, it is in the range of 220,000 to 280,000. When this weight average molecular weight exceeds 300,000, tackiness tends to occur on the surface of the gel.
 前記スチレン系熱可塑性エラストマー混合物(A)は、分散度(すなわち、重量平均分子量(Mw)と数平均分子量(Mn)の比(Mw/Mn))が1.25~1.60の範囲内であり、好ましくは1.35~1.55の範囲内である。分散度が1.25未満であると、ゲル状組成物の物性が単一のスチレン系熱可塑性エラストマーを用いた場合と変わらないため、トップシートに適用した後のゲルの伸びが不十分となる。一方、分散度が1.60を超えると、前記2種類のスチレン系熱可塑性エラストマー(A1,A2)の冷却固化時間の差によって、トップシートに適用した後のゲルが不均質になるため、ゲルの伸びや脆さなどの物性が低下する。 The styrenic thermoplastic elastomer mixture (A) has a dispersity (that is, a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw / Mn)) within a range of 1.25 to 1.60. Yes, preferably in the range of 1.35 to 1.55. When the dispersity is less than 1.25, the physical properties of the gel composition are the same as when a single styrenic thermoplastic elastomer is used, and the gel elongation after application to the top sheet becomes insufficient. . On the other hand, if the degree of dispersion exceeds 1.60, the gel after application to the top sheet becomes inhomogeneous due to the difference in cooling and solidifying time of the two types of styrene-based thermoplastic elastomers (A1, A2). The physical properties such as elongation and brittleness are reduced.
 前記2種類のスチレン系熱可塑性エラストマー(A1,A2)及び前記スチレン系熱可塑性エラストマー混合物(A)の重量平均分子量(Mw)と、前記スチレン系熱可塑性エラストマー混合物(A)の分散度(Mw/Mn)は、テトラヒドロフラン(THF)を移動相として、以下の条件でGPC測定を行い、ポリスチレン換算により求めることができる。 The weight average molecular weight (Mw) of the two types of styrenic thermoplastic elastomers (A1, A2) and the styrenic thermoplastic elastomer mixture (A), and the degree of dispersion of the styrenic thermoplastic elastomer mixture (A) (Mw / Mn) can be determined by polystyrene conversion by GPC measurement under the following conditions using tetrahydrofuran (THF) as a mobile phase.
 [GPC測定条件]
 装置  :GPC-8220 (東ソー(株)製)
 カラム :SHODEX KF-804 (昭和電工(株)製)
 温度  :40℃
 溶媒  :THF
 流量  :1.0mL/分
 試料濃度:0.05~0.6質量%
 注入量 :0.1mL
 検出  :RI(示差屈折計)
[GPC measurement conditions]
Equipment: GPC-8220 (manufactured by Tosoh Corporation)
Column: SHODEX KF-804 (manufactured by Showa Denko KK)
Temperature: 40 ° C
Solvent: THF
Flow rate: 1.0 mL / min Sample concentration: 0.05 to 0.6% by mass
Injection volume: 0.1 mL
Detection: RI (differential refractometer)
 上述したように、本発明において、前記ゲル状組成物は、重量平均分子量の異なる2種類のスチレン系熱可塑性エラストマー(A1,A2)の混合物を含有するが、その配合量は、低分子量のスチレン系熱可塑性エラストマー(A1)と高分子量のスチレン系熱可塑性エラストマー(A2)の質量比で、(A1)/(A2)=95/5~50/50の範囲内であり、好ましくは90/10~60/40、更に好ましくは80/20~70/30である。前記質量比において、低分子量のスチレン系熱可塑性エラストマー(A1)の配合比率が95を超えると、トップシートに適用した後のゲルの硬さと伸びが不十分となり、該配合比率が50未満であると、前記ゲルの表面にタック性が生じ易くなる。 As described above, in the present invention, the gel composition contains a mixture of two types of styrenic thermoplastic elastomers (A1, A2) having different weight average molecular weights. The mass ratio of the thermoplastic elastomer (A1) to the high molecular weight styrene thermoplastic elastomer (A2) is in the range of (A1) / (A2) = 95/5 to 50/50, preferably 90/10 60/40, more preferably 80/20 to 70/30. When the blending ratio of the low molecular weight styrene-based thermoplastic elastomer (A1) exceeds 95 in the mass ratio, the hardness and elongation of the gel after application to the top sheet becomes insufficient, and the blending ratio is less than 50. Then, tackiness is likely to occur on the surface of the gel.
 本発明において、前記ゲル状組成物は、37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を更に含む。前記炭化水素油(B)は、炭素と水素からなる化合物であれば特に制限されず、直鎖、分岐又は環状の構造を有していても、飽和又は不飽和結合を有していてもよい。前記炭化水素油(B)としては、例えば、オレフィン系炭化水素(二重結合を1つ含むアルケン)、パラフィン系炭化水素(二重結合も三重結合も含まないアルカン)、アセチレン系炭化水素(三重結合を1つ含むアルキン)、二重結合及び/又は三重結合を2つ以上含む炭化水素、並びに芳香族炭化水素、脂環式炭化水素等の環状炭化水素などが挙げられる。更に具体的には、水添ポリイソブテン、流動パラフィン、スクワラン、スクワレン等が挙げられ、特に、水添ポリイソブテンは、トップシートに適用した後のゲルにタック性が生じず、徐放された油剤によるベタツキも生じないため、好ましく用いることができる。 In the present invention, the gel composition further includes a hydrocarbon oil (B) having a kinematic viscosity at 37.8 ° C. of 5 to 50 mm 2 / s. The hydrocarbon oil (B) is not particularly limited as long as it is a compound composed of carbon and hydrogen, and may have a linear, branched or cyclic structure, or may have a saturated or unsaturated bond. . Examples of the hydrocarbon oil (B) include olefinic hydrocarbons (alkenes containing one double bond), paraffinic hydrocarbons (alkanes containing neither a double bond nor a triple bond), or acetylene hydrocarbons (triple). Alkyne having one bond), hydrocarbons having two or more double bonds and / or triple bonds, and cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons. More specifically, hydrogenated polyisobutene, liquid paraffin, squalane, squalene and the like can be mentioned. Therefore, it can be preferably used.
 前記炭化水素油(B)は、37.8℃における動粘度が5~50mm2/sの範囲内であり、好ましくは10~30mm2/sの範囲内、更に好ましくは10~20mm2/sの範囲内である。この動粘度が5mm2/s未満であると、炭化水素油(B)がゲル状組成物の製造時に揮発し易くなるため、トップシートに適用した後のゲルの物性にバラツキが生じる虞がある。一方、この動粘度が50mm2/sを超えると、トップシートに適用した後のゲルが硬くなり、タック性も生じ易くなる。なお、炭化水素油(B)の動粘度は、JIS K 2283:2000の「5.動粘度試験方法」に従って、キャノンフェンスケ逆流形粘度計を用いて、37.8℃の試験温度で測定することにより得ることができる。 The hydrocarbon oil (B) has a kinematic viscosity at 37.8 ° C. in the range of 5 to 50 mm 2 / s, preferably in the range of 10 to 30 mm 2 / s, and more preferably in the range of 10 to 20 mm 2 / s. Is within the range. If the kinematic viscosity is less than 5 mm 2 / s, the hydrocarbon oil (B) is likely to volatilize during the production of the gel composition, and there is a possibility that the physical properties of the gel after application to the top sheet may vary. . On the other hand, when the kinematic viscosity exceeds 50 mm 2 / s, the gel after being applied to the top sheet becomes hard and tackiness is likely to occur. The kinematic viscosity of the hydrocarbon oil (B) is measured at a test temperature of 37.8 ° C. using a Cannon Fenceke reverse flow viscometer according to “5. Kinematic viscosity test method” of JIS K 2283: 2000. Can be obtained.
 前記炭化水素油(B)の配合量は、前記スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、500~4800質量部の範囲内であり、好ましくは800~3000質量部の範囲内、更に好ましくは1000~1500質量部の範囲内である。この配合量が500質量部未満であると、トップシートに適用した後のゲルが硬くなり、伸びも低下する。一方、この配合量が4800質量部を超えると、前記ゲルが柔らかくなり過ぎて、前記ゲルの形状を維持することが難しくなる。 The blending amount of the hydrocarbon oil (B) is in the range of 500 to 4800 parts by weight, preferably in the range of 800 to 3000 parts by weight, with respect to 100 parts by weight of the styrenic thermoplastic elastomer mixture (A). More preferably, it is in the range of 1000 to 1500 parts by mass. When this blending amount is less than 500 parts by mass, the gel after being applied to the top sheet becomes hard, and the elongation also decreases. On the other hand, when this compounding quantity exceeds 4800 mass parts, the said gel will become too soft and it will become difficult to maintain the shape of the said gel.
 本発明において、前記ゲル状組成物は、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を更に含む。前記シリコーンオイル(C)は、シリコーンオイルであれば特に制限されず、任意の公知のシリコーンオイルを用いることができる。前記シリコーンオイル(C)としては、例えば、ジメチルポリシロキサン、メチルフェニルポリシロキサン等のジオルガノポリシロキサン、シクロペンタシロキサン等の環状シロキサンなどが挙げられる。特に、ジメチルポリシロキサンは、ゲル状組成物に油剤等の適度な徐放性を付与することができるため、好ましく用いることができる。 In the present invention, the gel composition further includes a silicone oil (C) having a kinematic viscosity at 25 ° C. of 50 to 200 mm 2 / s. The silicone oil (C) is not particularly limited as long as it is a silicone oil, and any known silicone oil can be used. Examples of the silicone oil (C) include diorganopolysiloxanes such as dimethylpolysiloxane and methylphenylpolysiloxane, and cyclic siloxanes such as cyclopentasiloxane. In particular, dimethylpolysiloxane can be preferably used because it can impart appropriate sustained release properties such as oils to the gel composition.
 前記シリコーンオイル(C)は、25℃における動粘度が50~200mm2/sの範囲内であり、好ましくは70~150mm2/sの範囲内、更に好ましくは80~120mm2/sの範囲内である。この動粘度が50mm2/s未満であると、シリコーンオイル(C)がゲル状組成物の製造時に揮発し易くなるため、トップシートに適用した後のゲルの物性にバラツキが生じる虞がある。一方、この動粘度が200mm2/sを超えると、油剤等の徐放量が少なくなり、タック性も生じ易くなる。なお、シリコーンオイル(C)の動粘度についても、JIS K 2283:2000の「5.動粘度試験方法」に従って、キャノンフェンスケ逆流形粘度計を用いて、25℃の試験温度で測定することにより得ることができる。 The silicone oil (C) has a kinematic viscosity at 25 ° C. in the range of 50 to 200 mm 2 / s, preferably in the range of 70 to 150 mm 2 / s, more preferably in the range of 80 to 120 mm 2 / s. It is. If the kinematic viscosity is less than 50 mm 2 / s, the silicone oil (C) is likely to volatilize during the production of the gel composition, and there is a possibility that the physical properties of the gel after application to the top sheet may vary. On the other hand, when the kinematic viscosity exceeds 200 mm 2 / s, the sustained release amount of the oil agent or the like decreases, and tackiness tends to occur. The kinematic viscosity of the silicone oil (C) is also measured at a test temperature of 25 ° C. using a Canon Fenceke reverse flow viscometer according to “5. Kinematic viscosity test method” of JIS K 2283: 2000. Obtainable.
 前記シリコーンオイル(C)の配合量は、前記スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、20~60質量部の範囲内であり、好ましくは30~50質量部の範囲内である。この配合量が20質量部未満であると、油剤等の徐放量が少なくなる。一方、この配合量が60質量部を超えると、油剤等の徐放量が多くなり過ぎて、ゲルの表面が油っぽくなる。 The blending amount of the silicone oil (C) is in the range of 20 to 60 parts by mass, preferably in the range of 30 to 50 parts by mass with respect to 100 parts by mass of the styrenic thermoplastic elastomer mixture (A). . When the blending amount is less than 20 parts by mass, the sustained release amount of the oil agent or the like decreases. On the other hand, when the blending amount exceeds 60 parts by mass, the sustained release amount of the oil agent or the like is excessively increased, and the surface of the gel becomes oily.
 本発明において、ゲル状組成物は、安定剤、酸化防止剤(例えば、BHT(2,6-ジ-t-ブチル-p-クレゾール)、BHA(ブチル化ヒドロキシアニソール)、没食子酸プロピル等)、光安定剤、着色剤、顔料(例えば、酸化チタン、酸化亜鉛等)、香料、無機粉体(例えば、アルミナ、タルク、マイカ、炭酸カルシウム、クレー等)、有機粉体(例えば、PE、PP、シリコーン樹脂のパウダー等)などの任意の添加剤又は他の成分を少なくとも1種、本発明の目的を損なわない範囲で含むことができる。 In the present invention, the gel composition contains a stabilizer, an antioxidant (for example, BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), propyl gallate, etc.), Light stabilizer, colorant, pigment (for example, titanium oxide, zinc oxide, etc.), fragrance, inorganic powder (for example, alumina, talc, mica, calcium carbonate, clay, etc.), organic powder (for example, PE, PP, etc.) Any additive such as a silicone resin powder or the like or other components may be included within a range not impairing the object of the present invention.
 前記他の成分としては、例えば、スキンケア作用を有するオイル類(例えば、ホホバオイル、ツバキオイル等)、ビタミン類、各種アミノ酸、ペプチド、ゼオライト、コレステロール、ヒアルロン酸、レシチン、セラミド、皮膚収斂剤、抗ニキビ剤、抗シワ剤、抗セルライト剤、美白剤、抗菌剤、抗カビ剤、抗炎症成分、pH調整剤、保湿剤などが挙げられる。 Examples of the other components include oils having skin care action (for example, jojoba oil, camellia oil, etc.), vitamins, various amino acids, peptides, zeolite, cholesterol, hyaluronic acid, lecithin, ceramide, skin astringent, Examples include acne agents, anti-wrinkle agents, anti-cellulite agents, whitening agents, antibacterial agents, anti-fungal agents, anti-inflammatory ingredients, pH adjusters, and moisturizers.
 前記ゲル状組成物は、上述した各種配合成分を、任意の公知の混合手段を用いて混合することにより製造することができる。例えば、前記ゲル状組成物は、上述の各種配合成分を、同時に或いは任意の順に混合装置内へ供給し、該混合装置内で溶融混合することにより製造することができる。この溶融混合の手段についても特に制限はなく、任意の公知の手段を採用することができ、例えば、単軸押出機、二軸押出機、ロール、バンバリーミキサー、各種ニーダー、配合釜などの混合装置を用いた手段が挙げられる。 The gel composition can be produced by mixing the above-described various blending components using any known mixing means. For example, the gel composition can be produced by supplying the above-mentioned various blending components simultaneously or in any order into a mixing apparatus and melt-mixing in the mixing apparatus. There is no particular limitation on the means for melting and mixing, and any known means can be adopted. For example, a single-screw extruder, a twin-screw extruder, a roll, a Banbury mixer, various kneaders, a mixing kettle, etc. The means using is mentioned.
 前記ゲル状組成物は、適度な硬さと伸びを有することに加え、徐放性も有するため、各種塗工装置又は成形装置への付着を抑制しつつ塗工ないし成形することができる。さらに、前記ゲル状組成物は、高分子量のスチレン系熱可塑性エラストマーよりも、低分子量のスチレン系熱可塑性エラストマーを多く配合しているため、100℃前後の温度条件においても適度な流動性を呈することから、不織布や紙、布、オレフィン系樹脂、PET樹脂などの各種基材に対して、塗布等による積層や一体化成形などを容易に行うことができる。 Since the gel composition has moderate hardness and elongation, and also has a sustained release property, it can be coated or molded while suppressing adhesion to various coating devices or molding devices. Furthermore, since the gel composition contains a larger amount of a low molecular weight styrene thermoplastic elastomer than a high molecular weight styrene thermoplastic elastomer, the gel composition exhibits appropriate fluidity even at a temperature of around 100 ° C. Therefore, lamination or integral molding by coating or the like can be easily performed on various base materials such as nonwoven fabric, paper, cloth, olefin resin, and PET resin.
 図1は、本発明の実施形態の1つに従う吸収性物品(生理用ナプキン)を示す平面図である。図1に示す生理用ナプキン1は、着用者の肌面側に位置する液透過性のトップシート2と、衣服側(すなわち、前記肌面側とは反対側)に位置する液不透過性のバックシート(図示せず)と、トップシート2及びバックシートの間に位置する吸収体3とを備える。さらに、図1に示す生理用ナプキン1においては、サイドシート4と、エンボス部5とを備える。 FIG. 1 is a plan view showing an absorbent article (a sanitary napkin) according to one embodiment of the present invention. A sanitary napkin 1 shown in FIG. 1 has a liquid-permeable top sheet 2 positioned on the skin surface side of the wearer and a liquid-impermeable surface positioned on the clothes side (that is, the side opposite to the skin surface side). A back sheet (not shown) and a top sheet 2 and an absorbent body 3 positioned between the back sheets are provided. Furthermore, the sanitary napkin 1 shown in FIG. 1 includes a side sheet 4 and an embossed portion 5.
 トップシート2は、その肌面側の表面に、前記生理用ナプキン1の長手方向に沿って、互いに平行に塗工された複数の畝状のゲル状組成物6を含む。なお、本発明の吸収性物品においては、ゲル状組成物の塗工パターンはこれに限定されない。 The top sheet 2 includes a plurality of cocoon-shaped gel-like compositions 6 applied in parallel to each other along the longitudinal direction of the sanitary napkin 1 on the surface on the skin side. In the absorbent article of the present invention, the coating pattern of the gel composition is not limited to this.
 図2は、本発明の別の実施形態に従う吸収性物品(生理用ナプキン)を示す平面図である。図2に示す生理用ナプキン1においては、前記トップシート2の肌面側の表面に千鳥状に塗工された複数のドット状のゲル状組成物6を含む。 FIG. 2 is a plan view showing an absorbent article (a sanitary napkin) according to another embodiment of the present invention. The sanitary napkin 1 shown in FIG. 2 includes a plurality of dot-like gel-like compositions 6 applied in a zigzag pattern on the surface of the top sheet 2 on the skin surface side.
 前記ゲル状組成物は、トップシートと吸収体とが平面視にて重複する領域において、該領域の1~50%の面積率で塗工されていることが好ましく、該領域の3~40%の面積率で塗工されていることが更に好ましく、該領域の5~30%の面積率で塗工されていることが特に好ましい。前記ゲル状組成物が、前記領域の1%未満の面積率で塗工されていると、トップシート上におけるゲル状組成物の量が少ないため、当該ゲル状組成物によって奏される効果が十分に発揮できない。一方、前記ゲル状組成物が、前記領域の50%を超える面積率で塗工されていると、当該ゲル状組成物が塗工されているトップシート上の領域は***物を吸収しないため、トップシートにおいて***物を吸収することのできる領域が少なくなり、吸収性物品の吸収性能が低下する虞がある。 In the region where the top sheet and the absorbent body overlap in plan view, the gel composition is preferably applied at an area ratio of 1 to 50% of the region, and 3 to 40% of the region. It is more preferable that the coating is performed at an area ratio of 5 to 30% of the area. When the gel-like composition is applied at an area ratio of less than 1% of the region, the amount of the gel-like composition on the top sheet is small, and thus the effect exhibited by the gel-like composition is sufficient. It cannot be demonstrated. On the other hand, when the gel composition is applied at an area ratio exceeding 50% of the region, the region on the top sheet to which the gel composition is applied does not absorb excrement, There is a possibility that the area where the excrement can be absorbed in the top sheet is reduced, and the absorbent performance of the absorbent article may be lowered.
 また、前記ゲル状組成物が塗工されたトップシートは、前記ゲル状組成物を好ましくは1~30g/m2、更に好ましくは2~20g/m2、特に好ましくは3~10g/m2の含有量で含む。なお、本明細書において、前記ゲル状組成物の含有量は次のようにして求める。
(1)ゲル状組成物が塗工されたトップシートの測定対象となる所定範囲を、例えば、カッターの替え刃等の鋭利な刃物を用いて、その厚さを変化させないように切り出し、含有量測定用のサンプルを得る。
(2)切り出したサンプルの面積:SA(m2)及び質量:SM0(g)を測定する。
(3)測定後のサンプルを、芳香族系溶媒(例えば、キシレン等)などのゲル状組成物が可溶な溶媒中に浸し、少なくとも3分間攪拌して、前記ゲル状組成物を溶媒中に溶出させる。
(4)予め質量を測定したろ紙を用いて前記溶媒中のサンプルをろ過した後、そのままろ紙上において、サンプルを溶媒で十分に洗浄する。洗浄後のサンプルをろ紙ごと100℃のオーブン内で十分に乾燥させる。
(5)乾燥後のろ紙及びサンプルの質量を測定し、その値から予め測定したろ紙の質量を差し引くことにより、乾燥後のサンプルの質量:SM1(g)を算出する。
(6)ゲル状組成物の含有量GBS(g/m2)を、次式(1)により算出する。
Figure JPOXMLDOC01-appb-M000001
Further, the topsheet where the gel composition is applied, the gel composition preferably is 1 ~ 30g / m 2, more preferably 2 ~ 20g / m 2, particularly preferably 3 ~ 10g / m 2 Including the content of In addition, in this specification, content of the said gel-like composition is calculated | required as follows.
(1) A predetermined range to be measured on the top sheet coated with the gel-like composition is cut out using, for example, a sharp blade such as a cutter blade so as not to change the thickness thereof. Obtain a sample for measurement.
(2) The area: SA (m 2 ) and mass: SM 0 (g) of the cut sample are measured.
(3) The sample after measurement is immersed in a solvent in which a gel composition such as an aromatic solvent (eg, xylene) is soluble, and stirred for at least 3 minutes, and the gel composition is placed in the solvent. Elute.
(4) After filtering the sample in the said solvent using the filter paper which measured mass beforehand, a sample is fully wash | cleaned with a solvent on a filter paper as it is. The sample after washing is thoroughly dried in a 100 ° C. oven together with the filter paper.
(5) The mass of the filter paper and the sample after drying is measured, and the mass of the sample after drying: SM 1 (g) is calculated by subtracting the mass of the filter paper measured in advance from the measured value.
(6) The content GBS (g / m 2 ) of the gel composition is calculated by the following formula (1).
Figure JPOXMLDOC01-appb-M000001
 なお、前記ゲル状組成物の含有量は、測定誤差を少なくするために、サンプルの総面積が100cm2を超えるように複数の吸収性物品から複数のサンプルを切り出して、それぞれのサンプルについて上記(2)~(6)の測定作業を行い、それぞれの測定作業から得られた含有量GBSの平均値を採用する。 In addition, in order to reduce the measurement error, the content of the gel composition is cut out from a plurality of absorbent articles so that the total area of the sample exceeds 100 cm 2, and the above ( 2) perform the measurement task to (6), employing the average value of the obtained content G BS from each measuring operation.
 本発明において、前記ゲル状組成物の塗工方法は、特に限定されず、任意の公知の塗工方法を採用することができる。例えば、前記ゲル状組成物は、吐出ノズルを備えた押出装置;スパイラルコーター、カーテンコーター、スプレーコーター、ディップコーター等の非接触式のコーター;接触式のコーターなどの塗布装置を用いて、トップシート上に塗布することができる。 In the present invention, the coating method of the gel composition is not particularly limited, and any known coating method can be adopted. For example, the gel composition may be produced by using an extrusion apparatus equipped with a discharge nozzle; a non-contact type coater such as a spiral coater, curtain coater, spray coater or dip coater; a top sheet using a coating apparatus such as a contact type coater. Can be applied on top.
 また、前記ゲル状組成物は、不織布などのトップシートの素材を製造する際に塗工しても、或いは吸収性物品の製造ラインにおいて前記トップシート上に塗工してもよい。前記ゲル状組成物は、設備投資を抑制する観点から、吸収性物品の製造ラインにおいて前記トップシート上に塗工することが好ましく、特に、油剤等の脱落による汚染を抑制するという点から、前記製造ラインの下流工程(例えば、製品を個別に梱包する工程の直前など)において前記トップシート上に塗工することが好ましい。 Further, the gel composition may be applied when a top sheet material such as a nonwoven fabric is manufactured, or may be applied on the top sheet in an absorbent article manufacturing line. From the viewpoint of suppressing capital investment, the gel composition is preferably applied on the top sheet in an absorbent article production line, and in particular, from the viewpoint of suppressing contamination due to falling off of oil or the like. It is preferable to apply on the top sheet in a downstream process of the production line (for example, immediately before a process of individually packing products).
 本発明の吸収性物品において、液透過性のトップシートは、例えば、不織布、織布などのシート状の繊維構造体を用いることができる。前記トップシートとして不織布又は織布を用いる場合、該不織布又は織布を構成する繊維としては、天然繊維、化学繊維等が挙げられ、更に具体的には、粉砕パルプ、コットン等のセルロース繊維;レーヨン、フィブリルレーヨン等の再生セルロース;アセテート、トリアセテート等の半合成セルロース;熱可塑性疎水性化学繊維;親水化処理を施した熱可塑性疎水性化学繊維などが挙げられる。さらに、前記熱可塑性疎水性化学繊維としては、例えば、ポリエチレン(PE)、ポリプロピレン(PP)、ポリエチレンテレフタレート(PET)等からなる単繊維、PE及びPPのグラフト重合体からなる繊維などが挙げられる。 In the absorbent article of the present invention, the liquid-permeable top sheet may be a sheet-like fiber structure such as a nonwoven fabric or a woven fabric. When a nonwoven fabric or woven fabric is used as the top sheet, the fibers constituting the nonwoven fabric or woven fabric include natural fibers, chemical fibers, and the like. More specifically, cellulose fibers such as pulverized pulp and cotton; rayon; And regenerated cellulose such as fibrillar rayon; semi-synthetic cellulose such as acetate and triacetate; thermoplastic hydrophobic chemical fiber; and thermoplastic hydrophobic chemical fiber subjected to hydrophilic treatment. Furthermore, examples of the thermoplastic hydrophobic chemical fiber include single fibers made of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and the like, fibers made of PE and PP graft polymers, and the like.
 前記不織布の例としては、例えば、エアスルー不織布、スパンボンド不織布、ポイントボンド不織布、スパンレース不織布、ニードルパンチ不織布、メルトブローン不織布、及びこれらの組み合わせ(例えば、SMS等)等が挙げられる。 Examples of the nonwoven fabric include air-through nonwoven fabric, spunbond nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, needle punch nonwoven fabric, melt blown nonwoven fabric, and combinations thereof (for example, SMS).
 また、前記不織布又は織布は、親水化処理されていることが好ましい。この親水化処理の方法としては、特に制限されないが、不織布又は織布の表面に親水化剤をコーティングする方法、不織布又は織布を構成する繊維の表面に親水化剤をコーティングする方法、不織布又は織布を構成する繊維の原料である合成樹脂に親水化剤を含有させる方法などが挙げられる。 Moreover, it is preferable that the nonwoven fabric or the woven fabric is subjected to a hydrophilic treatment. The hydrophilization treatment method is not particularly limited, but a method of coating the surface of the nonwoven fabric or woven fabric with a hydrophilizing agent, a method of coating the surface of fibers constituting the nonwoven fabric or woven fabric, a nonwoven fabric or Examples thereof include a method of adding a hydrophilizing agent to a synthetic resin that is a raw material for fibers constituting the woven fabric.
 一方、液不透過性のバックシートとしては、PE、PP等を含むフィルム、通気性を有する樹脂フィルム、スパンボンド又はスパンレース等の不織布に通気性を有する樹脂フィルムを貼り合わせた積層体、SMS等の複層不織布などが挙げられる。吸収性物品の柔軟性等を考慮すると、例えば、坪量が約15~約30g/m2の低密度ポリエチレン(LDPE)フィルムが好ましい。 On the other hand, as a liquid-impermeable back sheet, a film comprising PE, PP, etc., a resin film having air permeability, a laminate in which a resin film having air permeability is bonded to a nonwoven fabric such as spunbond or spunlace, SMS And the like, and the like. Considering the flexibility of the absorbent article, for example, a low density polyethylene (LDPE) film having a basis weight of about 15 to about 30 g / m 2 is preferable.
 本発明の一実施形態においては、吸収性物品が、液透過性のトップシートと吸収体との間に、セカンドシートを含むことができる。該セカンドシートとしては、液透過性のトップシートと同様のものを用いることができる。 In one embodiment of the present invention, the absorbent article may include a second sheet between the liquid-permeable top sheet and the absorbent body. As the second sheet, the same sheet as the liquid-permeable top sheet can be used.
 本発明の吸収性物品において、吸収体は、特に制限されず、当分野において公知の任意の吸収体を用いることができる。前記吸収体の一例としては、吸収コアをコアラップで覆ったものが挙げられる。前記吸収コアの構成要素としては、例えば、親水性繊維が挙げられ、更に具体的には、粉砕パルプ、コットン等のセルロース;レーヨン、フィブリルレーヨン等の再生セルロース;アセテート、トリアセテート等の半合成セルロース;粒子状ポリマー;繊維状ポリマー;熱可塑性疎水性化学繊維;親水化処理された熱可塑性疎水性化学繊維;及びこれらの任意の組み合わせなどが挙げられる。また、前記吸収コアの構成要素として、例えば、アクリル酸ナトリウムコポリマー等の高吸収性ポリマーからなる粒状物を用いてもよい。 In the absorbent article of the present invention, the absorber is not particularly limited, and any absorber known in the art can be used. As an example of the said absorber, what covered the absorption core with the core wrap is mentioned. Examples of components of the absorbent core include hydrophilic fibers, and more specifically, cellulose such as pulverized pulp and cotton; regenerated cellulose such as rayon and fibril rayon; semisynthetic cellulose such as acetate and triacetate; Examples thereof include particulate polymer; fibrous polymer; thermoplastic hydrophobic chemical fiber; hydrophilized thermoplastic hydrophobic chemical fiber; and any combination thereof. Moreover, you may use the granular material which consists of superabsorbent polymers, such as a sodium acrylate copolymer, for example as a component of the said absorption core.
 前記コアラップとしては、人体から排出される体液等の液体が透過できる程度の液透過性を有し、且つ内包する吸収コアの構成要素が透過しない程度のバリアー性を有するものであれば、特に制限されないが、例えば、織布、不織布などのシート状の繊維構造体が挙げられる。さらに、前記織布及び不織布としては、天然繊維、化学繊維、ティッシュなどが挙げられる。 The core wrap is not particularly limited as long as the core wrap has liquid permeability that allows liquid such as body fluid discharged from the human body to permeate, and has barrier properties that do not allow permeation of the constituent components of the absorbent core included. However, for example, a sheet-like fiber structure such as a woven fabric or a non-woven fabric can be used. Furthermore, examples of the woven fabric and non-woven fabric include natural fibers, chemical fibers, and tissues.
 前記吸収体の他の例としては、吸収シート又はポリマーシートから形成された略シート状の構造体などが挙げられ、その厚さは、0.3~5.0mmの範囲内であることが好ましい。前記吸収シート又はポリマーシートとしては、生理用ナプキン等の一般的な吸収性物品に用いられるものであれば、特に制限なく用いることができる。 Other examples of the absorbent include a substantially sheet-like structure formed from an absorbent sheet or a polymer sheet, and the thickness is preferably in the range of 0.3 to 5.0 mm. . The absorbent sheet or polymer sheet can be used without particular limitation as long as it is used for general absorbent articles such as sanitary napkins.
 本発明の吸収性物品における好ましい実施形態としては、人体から排出される***物等を吸収するための物品であれば特に限定されないが、例えば、生理用ナプキン、パンティーライナー、おむつ、尿取りパッド等が挙げられる。 A preferred embodiment of the absorbent article of the present invention is not particularly limited as long as it is an article for absorbing excreta discharged from the human body, but for example, sanitary napkins, panty liners, diapers, urine collection pads, etc. Is mentioned.
 また、本発明は、不織布に関する。本発明の不織布は、使用者の肌と接する領域の少なくとも一部に、上述のゲル状組成物を有する。本発明の不織布に用いられるゲル状組成物の組成等は、上述のとおりである。
 本発明の不織布は、使用者の肌と接する領域の少なくとも一部に、適度な硬さ、伸び及び有効成分の徐放性を有しつつ、タック性の少ないゲル状組成物を有するため、優れた着用感や取扱い易さを有しつつ、有効成分を着用者の肌に継続的に放出することができる。
The present invention also relates to a nonwoven fabric. The nonwoven fabric of this invention has the above-mentioned gel-like composition in at least one part of the area | region which contacts a user's skin. The composition of the gel composition used for the nonwoven fabric of the present invention is as described above.
Since the nonwoven fabric of the present invention has a gel composition with less tackiness while having moderate hardness, elongation and sustained release of the active ingredient in at least a part of the region in contact with the user's skin, The active ingredient can be continuously released to the wearer's skin while having a good wearing feeling and easy handling.
 本発明の不織布においても、上記ゲル状組成物は、使用者の肌と接する領域の少なくとも一部に、例えば、畝状又はドット状に配置される。前記不織布を含む製品としては、マスク、ウェットティッシュ等が挙げられる。 Also in the nonwoven fabric of the present invention, the gel composition is disposed in at least a part of a region in contact with the user's skin, for example, in a hook shape or a dot shape. Examples of the product containing the nonwoven fabric include a mask and a wet tissue.
 以下、実施例及び比較例を例示して本発明を更に具体的に説明するが、本発明は実施例のみに限定されるものではない。 Hereinafter, the present invention will be described more specifically by way of examples and comparative examples. However, the present invention is not limited only to the examples.
 本発明の実施例及び比較例の吸収性物品におけるゲル状組成物を製造するにあたっては、各種配合成分として、それぞれ以下の市販品を用いた。 In manufacturing the gel compositions in the absorbent articles of Examples and Comparative Examples of the present invention, the following commercially available products were used as various blending components.
1)スチレン系熱可塑性エラストマー(A1,A2) 
a)低分子量のスチレン系熱可塑性エラストマー(A1)
 ・クレイトンG1652(Mwが8万のスチレン-エチレン-ブチレン-スチレンブロック共重合体(SEBS)、クレイトンポリマー社製)
 ・セプトン4033(Mwが10万のスチレン-エチレン/エチレン-プロピレン-スチレンブロック共重合体(SEEPS)、クラレ(株)製)
 ・セプトン8004(Mwが11万のスチレン-エチレン-ブチレン-スチレンブロック共重合体(SEBS)、クラレ(株)製)
1) Styrenic thermoplastic elastomer (A1, A2)
a) Low molecular weight styrenic thermoplastic elastomer (A1)
・ Clayton G1652 (styrene-ethylene-butylene-styrene block copolymer (SEBS) having a Mw of 80,000, manufactured by Kraton Polymer Co., Ltd.)
Septon 4033 (styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS) with a Mw of 100,000, manufactured by Kuraray Co., Ltd.)
・ Septon 8004 (styrene-ethylene-butylene-styrene block copolymer (SEBS) with Mw of 110,000, manufactured by Kuraray Co., Ltd.)
b)高分子量のスチレン系熱可塑性エラストマー(A2)
 ・クレイトンG1654(Mwが20万のスチレン-エチレン-ブチレン-スチレンブロック共重合体(SEBS)、クレイトンポリマー社製)
 ・セプトン4055(Mwが25万のスチレン-エチレン/エチレン-プロピレン-スチレンブロック共重合体(SEEPS)、クラレ(株)製)
 ・セプトン2005(Mwが26万のスチレン-エチレン-プロピレン-スチレンブロック共重合体(SEPS)、クラレ(株)製)
 ・セプトン2006(Mwが28万のスチレン-エチレン-プロピレン-スチレンブロック共重合体(SEPS)、クラレ(株)製)
b) High molecular weight styrenic thermoplastic elastomer (A2)
・ Clayton G1654 (styrene-ethylene-butylene-styrene block copolymer (SEBS) having a Mw of 200,000, manufactured by Kraton Polymer Co., Ltd.)
Septon 4055 (styrene-ethylene / ethylene-propylene-styrene block copolymer (SEEPS) with Mw of 250,000, manufactured by Kuraray Co., Ltd.)
Septon 2005 (styrene-ethylene-propylene-styrene block copolymer (SEPS) with Mw of 260,000, manufactured by Kuraray Co., Ltd.)
Septon 2006 (Styrene-ethylene-propylene-styrene block copolymer (SEPS) with a Mw of 280,000, manufactured by Kuraray Co., Ltd.)
2)油剤 
a)炭化水素油(B)
 ・パールリームEX(37.8℃における動粘度が10mm2/sの水添ポリイソブテン、日油(株)製)
 ・パールリーム6(37.8℃における動粘度が20mm2/sの水添ポリイソブテン、日油(株)製)
 ・スーパースクワラン(37.8℃における動粘度が18mm2/sのスクワラン、スクアテック(株)製)
 ・モレスコホワイトP-200(37.8℃における動粘度が44mm2/sの流動パラフィン、(株)MORESCO製)
 ・流動パラフィン(37.8℃における動粘度が75mm2/sの流動パラフィン、キシダ化学(株)製)
2) Oil
a) Hydrocarbon oil (B)
Pearl Ream EX (hydrogenated polyisobutene with a kinematic viscosity at 37.8 ° C. of 10 mm 2 / s, manufactured by NOF Corporation)
・ Pearl Ream 6 (hydrogenated polyisobutene having a kinematic viscosity at 37.8 ° C. of 20 mm 2 / s, manufactured by NOF Corporation)
・ Super Squalane (Squalane with a kinematic viscosity of 18 mm 2 / s at 37.8 ° C, manufactured by SQUATECH Co., Ltd.)
-Moresco White P-200 (liquid paraffin with a kinematic viscosity of 44 mm 2 / s at 37.8 ° C, manufactured by MORESCO)
Liquid paraffin (liquid paraffin with a kinematic viscosity at 37.8 ° C. of 75 mm 2 / s, manufactured by Kishida Chemical Co., Ltd.)
 b)シリコーンオイル(C)
 ・SH200-100cs(25℃における動粘度が100mm2/sのジメチルポリシロキサン、東レ・ダウコーニング(株)製)
 ・SH200-500cs(25℃における動粘度が500mm2/sのジメチルポリシロキサン、東レ・ダウコーニング(株)製)
b) Silicone oil (C)
・ SH200-100cs (dimethylpolysiloxane with kinematic viscosity at 25 ° C of 100 mm 2 / s, manufactured by Toray Dow Corning Co., Ltd.)
-SH200-500cs (dimethylpolysiloxane having a kinematic viscosity at 25 ° C of 500 mm 2 / s, manufactured by Toray Dow Corning Co., Ltd.)
1.ゲル状組成物の製造 
 上記した各種配合成分を、下記の表1に示す各組成でセパラブルフラスコに仕込み、内容物を撹拌しながら140℃で5時間溶融混合した後、冷却して、ゲル状組成物No.1-1~1-6及び2-1~2-8を得た。得られた各ゲル状組成物の特性を、以下の各種試験方法(1)~(4)により評価した。各種試験及び評価の結果を表1に示す。
1. Production of gel composition
The above-described various blending components were charged into separable flasks with the respective compositions shown in Table 1 below, and the contents were melted and mixed at 140 ° C. for 5 hours with stirring, then cooled, and the gel composition No. 1-1 to 1-6 and 2-1 to 2-8 were obtained. The properties of each obtained gel composition were evaluated by the following various test methods (1) to (4). Table 1 shows the results of various tests and evaluations.
2.ゲル状組成物の評価 
(1)硬さ
 上記のようにして得られたゲル状組成物を用いて、直径40mm、厚さ8mmの円柱状ゲルからなる試験片を作製した。この試験片を、直径120mmのステンレス製圧縮治具が取り付けられた小型卓上試験機EzTest(島津製作所製)にセットし、前記試験片を速度5mm/分で4mm圧縮したときの試験力(N)を測定した。測定した値を次の基準により評価した。
  2点: 6N以上、41N未満
  1点: 41N以上、101N未満
  0点: 6N未満又は101N以上
2. Evaluation of gel composition
(1) Hardness Using the gel composition obtained as described above, a test piece made of a columnar gel having a diameter of 40 mm and a thickness of 8 mm was produced. This test piece is set on a small desktop tester EzTest (manufactured by Shimadzu Corporation) equipped with a stainless steel compression jig having a diameter of 120 mm, and the test force when the test piece is compressed 4 mm at a speed of 5 mm / min (N) Was measured. The measured value was evaluated according to the following criteria.
2 points: 6N or more, less than 41N 1 point: 41N or more, less than 101N 0 point: less than 6N or 101N or more
(2)脆さ
 上記の硬さ評価を行った後の試験片を目視にて観察し、当該試験片の状態を次の基準により評価した。
  2点: 割れていない
  1点: やや割れている
  0点: 割れている
(2) Brittleness The test piece after the above hardness evaluation was visually observed, and the state of the test piece was evaluated according to the following criteria.
2 points: not cracked 1 point: slightly cracked 0 point: cracked
(3)伸び
 上記のようにして得られたゲル状組成物を、120℃、圧力10kg/cm2の条件で熱プレスして、60mm×60mm×1mm厚のゲルシートを作製した後、該ゲルシートをカットして、20mm×60mmの短冊状の試験片を作製した。この試験片の長手方向における両端部を、両手を使ってそれぞれ親指と人差し指で摘み、該両端部を相反する方向(すなわち、両端部が互いに離れる方向)に引っ張り、前記試験片を引っ張る前の元の長さから5cm、7cm及び10cm引き伸ばしたときの破断の有無を観察した。なお、試験片が手元で破断した場合は、再度やり直した。上記のようにして観察した結果を次の基準により評価した。
  2点: +10cm引き伸ばしたときに切れた
  1点: +7cm引き伸ばしたときに切れた
  0点: +5cm引き伸ばしたときに切れた
(3) Elongation After the gel-like composition obtained as described above is hot-pressed under the conditions of 120 ° C. and a pressure of 10 kg / cm 2 to prepare a gel sheet of 60 mm × 60 mm × 1 mm thickness, It cut and produced the test piece of a strip shape of 20 mm x 60 mm. Both ends of the test piece in the longitudinal direction are picked with both thumbs and index fingers using both hands, and the both ends are pulled in opposite directions (that is, both ends are separated from each other). The presence or absence of breakage when 5 cm, 7 cm, and 10 cm were stretched from the length of was observed. In addition, when the test piece broke at hand, it started again. The results observed as described above were evaluated according to the following criteria.
2 points: cut when +10 cm stretched 1 point: cut when +7 cm stretched 0 point: cut when stretched +5 cm
(4)徐放性
 上記のようにして得られたゲル状組成物を用いて、直径40mm、厚さ8mmの円柱状ゲルからなる試験片を作製した。この試験片の上面に、予め質量を測定しておいた市販のティッシュペーパー(2枚1組)を載せて、該ティッシュペーパーの上から100gの荷重をかけて室温(23℃)で24時間放置した後、前記ティッシュペーパーを取り外して、その質量を測定した。そして、予め測定しておいた質量(W1)と、24時間放置した後に測定した質量(W2)とから、下式(2)に基づいてティッシュペーパーの質量増加率を算出し、該質量増加率を徐放量として、以下の基準により評価した。
Figure JPOXMLDOC01-appb-M000002
  2点: 質量増加率(徐放量)が1.5%以上、9.1%未満
  1点: 質量増加率(徐放量)が9.1%以上
  0点: 質量増加率(徐放量)が1.5%未満
(4) Sustained release property Using the gel composition obtained as described above, a test piece made of a columnar gel having a diameter of 40 mm and a thickness of 8 mm was prepared. A commercially available tissue paper (a set of two sheets) whose mass was measured in advance was placed on the upper surface of the test piece, and a load of 100 g was applied from above the tissue paper and left at room temperature (23 ° C.) for 24 hours. Then, the tissue paper was removed and its mass was measured. Then, the mass increase rate of the tissue paper is calculated based on the following formula (2) from the mass (W 1 ) measured in advance and the mass (W 2 ) measured after being left for 24 hours. The increase rate was evaluated as the sustained release amount according to the following criteria.
Figure JPOXMLDOC01-appb-M000002
2 points: Mass increase rate (sustained release amount) is 1.5% or more and less than 9.1% 1 point: Mass increase rate (sustained release amount) is 9.1% or more 0 point: Mass increase rate (sustained release amount) is 1 Less than 5%
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
3.吸収性物品の製造 
 上記のようにして得られたゲル状組成物No.1-1~1-6及び2-1~2-8を、市販の生理用ナプキンのトップシート上に畝状に塗工して、実施例1~6及び比較例1~8の吸収性物品(生理用ナプキン)を得た。
3. Production of absorbent articles
The gel composition No. obtained as described above. Absorbent articles of Examples 1 to 6 and Comparative Examples 1 to 8 were prepared by coating 1-1 to 1-6 and 2-1 to 2-8 on a top sheet of a commercially available sanitary napkin. (Sanitary napkin) was obtained.
4.吸収性物品の評価 
 上記のようにして得られた実施例1~6及び比較例1~8の吸収性物品を用いて、各トップシート上に塗工されたゲル状組成物の表面を指で左右に10往復させたときの触感を、「柔らかさ」と「濡れ性及びタック性」の観点から評価した。この官能評価においては、10人の被験者に、前記トップシート上に塗工して23℃で一晩放置した後のゲル状組成物を触ってもらい、以下の評価基準によるアンケートを実施した。なお、アンケートの結果は、10人の平均点とした。
4). Evaluation of absorbent articles
Using the absorbent articles of Examples 1 to 6 and Comparative Examples 1 to 8 obtained as described above, the surface of the gel composition coated on each top sheet was reciprocated 10 times left and right with a finger. The tactile sensation was evaluated from the viewpoints of “softness” and “wetting and tackiness”. In this sensory evaluation, 10 subjects were asked to touch the gel-like composition after being coated on the top sheet and allowed to stand at 23 ° C. overnight, and a questionnaire was conducted according to the following evaluation criteria. In addition, the result of the questionnaire was an average score of 10 people.
 [柔らかさ]
  2点: 弾力があり且つ柔らかい
  1点: 弾力はないが柔らかい、又は弾力はあるが硬い
  0点: 弾力がなく且つ硬い
[soft]
2 points: elastic and soft 1 point: no elasticity but soft or elastic but hard 0 points: no elasticity and hard
 [濡れ性及びタック性]
  3点: 指が濡れ、タック性がない
  2点: 指が濡れ、タック性をやや有する
  1点: 指が濡れ、タック性がない
  0点: タック性の有無に関わらず、指が濡れない
[Wettability and tackiness]
3 points: fingers wet, no tackiness 2 points: fingers wet, some tackiness 1 point: fingers wet, no tackiness 0 points: finger does not get wet regardless of tackiness
 <総合評価>
 上記したゲル状組成物の(1)~(4)の物性評価と、上記吸収性物品の官能評価の合計点に基づいて、実施例1~6及び比較例1~8の吸収性物品を以下の基準により総合的に評価した。吸収性物品の官能評価及び総合評価の結果を下記の表2に示す。
  ○: 合計点が11.0点以上であって、官能評価で0点をつけた人がいない
  △: 合計点が11.0点以上であって、官能評価で0点をつけた人がいる
  ×: 合計点が11.0点未満である
<Comprehensive evaluation>
Based on the total points of the physical property evaluations (1) to (4) of the gel composition and the sensory evaluation of the absorbent article, the absorbent articles of Examples 1 to 6 and Comparative Examples 1 to 8 are as follows. Overall evaluation was made according to the criteria of The results of sensory evaluation and comprehensive evaluation of the absorbent article are shown in Table 2 below.
○: No one has a total score of 11.0 or more and scored 0 in sensory evaluation. △: Some have a total score of 11.0 or more and score 0 in sensory evaluation. X: The total score is less than 11.0 points
Figure JPOXMLDOC01-appb-T000004
Figure JPOXMLDOC01-appb-T000004
 表2に示すように実施例1~6の吸収性物品は、総合評価において良好な結果を示した。特に、実施例1~4の吸収性物品については、用いたゲル状組成物No.1-1~1-4が、硬さ、伸び及び徐放性のすべてにおいて優れており、吸収性物品の官能評価においても高い評価結果が得られた。 As shown in Table 2, the absorbent articles of Examples 1 to 6 showed good results in comprehensive evaluation. In particular, for the absorbent articles of Examples 1 to 4, the gel composition No. used was used. 1-1 to 1-4 were excellent in all of hardness, elongation and sustained release properties, and high evaluation results were obtained in the sensory evaluation of the absorbent article.
 一方、比較例1の吸収性物品は、用いたゲル状組成物No.2-1がスチレン系熱可塑性エラストマーとして低分子量のスチレン系熱可塑性エラストマー(A1)のみを含んでいたため、ゲルが硬くなり、脆さも見られた。 On the other hand, the absorbent article of Comparative Example 1 was the gel composition No. used. Since 2-1 contained only the low molecular weight styrene thermoplastic elastomer (A1) as the styrene thermoplastic elastomer, the gel became hard and brittleness was also observed.
 比較例2の吸収性物品は、用いたゲル状組成物No.2-2が、スチレン系熱可塑性エラストマーとして高分子量のスチレン系熱可塑性エラストマー(A2)のみを含んでいたため、ゲルの伸びは優れていたものの、徐放量が大きくなり、吸収性物品の官能評価においてはタック性が確認された。 The absorbent article of Comparative Example 2 is the gel composition No. used. 2-2 contained only a high molecular weight styrene-based thermoplastic elastomer (A2) as a styrene-based thermoplastic elastomer, but although the gel elongation was excellent, the sustained release amount increased and the sensory evaluation of the absorbent article In the case, tackiness was confirmed.
 比較例3の吸収性物品は、用いたゲル状組成物No.2-3における炭化水素油(B)の配合量が500質量部よりも少なかったため、ゲルが硬くなり、徐放量も小さく、また、吸収性物品の官能評価においては濡れ性が悪かった。 The absorbent article of Comparative Example 3 is the gel composition No. used. Since the blending amount of the hydrocarbon oil (B) in 2-3 was less than 500 parts by mass, the gel became hard, the sustained release amount was small, and the wettability was poor in the sensory evaluation of the absorbent article.
 比較例4の吸収性物品は、用いたゲル状組成物No.2-4の炭化水素油(B)の37.8℃における動粘度が50mm2/sよりも大きかったため、徐放量が小さくなり、吸収性物品の官能評価においてはタック性が確認された。 The absorbent article of Comparative Example 4 has the gel composition No. used. Since the kinematic viscosity at 37.8 ° C. of the hydrocarbon oil (B) 2-4 was larger than 50 mm 2 / s, the sustained release amount was small, and tackiness was confirmed in the sensory evaluation of the absorbent article.
 比較例5の吸収性物品は、用いたゲル状組成物No.2-5における低分子量のスチレン系熱可塑性エラストマー(A1)と高分子量のスチレン系熱可塑性エラストマー(A2)との質量比が(A1)/(A2)=95/5~50/50の範囲外であったため、徐放量が大きくなり、吸収性物品の官能評価においてはタック性が確認された。 The absorbent article of Comparative Example 5 is the gel composition No. used. The mass ratio of the low molecular weight styrenic thermoplastic elastomer (A1) to the high molecular weight styrenic thermoplastic elastomer (A2) in 2-5 is outside the range of (A1) / (A2) = 95/5 to 50/50 Therefore, the sustained release amount was increased, and tackiness was confirmed in the sensory evaluation of the absorbent article.
 比較例6の吸収性物品は、用いたゲル状組成物No.2-6におけるスチレン系熱可塑性エラストマー混合物(A)の分散度が1.60よりも大きかったため、ゲルの伸びが悪くなり、脆さも見られた。 The absorbent article of Comparative Example 6 is the gel composition No. used. Since the dispersity of the styrene-based thermoplastic elastomer mixture (A) in 2-6 was greater than 1.60, the gel elongation deteriorated and brittleness was also observed.
 比較例7の吸収性物品は、用いたゲル状組成物No.2-7のシリコーンオイル(C)の25℃における動粘度が200mm2/sよりも大きかったため、徐放量が小さくなり、吸収性物品の官能評価においてはタック性が確認された。 The absorbent article of Comparative Example 7 was the gel composition No. used. Since the kinematic viscosity of the 2-7 silicone oil (C) at 25 ° C. was larger than 200 mm 2 / s, the sustained release amount was small, and tackiness was confirmed in the sensory evaluation of the absorbent article.
 比較例8の吸収性物品は、用いたゲル状組成物No.2-8がシリコーンオイル(C)を含んでいなかったため、徐放量が極めて小さくなり、吸収性物品の官能評価においては濡れ性が悪かった。 The absorbent article of Comparative Example 8 is the gel composition No. used. Since 2-8 did not contain silicone oil (C), the sustained release amount was extremely small, and the wettability was poor in the sensory evaluation of the absorbent article.
  以下に、想定される本発明の態様について例示する。 The following is an example of an assumed aspect of the present invention.
 本発明の一態様(態様1)は、液透過性のトップシートと、液不透過性のバックシートと、前記トップシート及び前記バックシートの間に位置する吸収体と、を有する吸収性物品であって、前記トップシートは、その肌面側の表面にゲル状組成物を含み、前記ゲル状組成物は、重量平均分子量が10万以上18万未満であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A1)と、重量平均分子量が18万以上30万以下であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A2)とを、(A1)/(A2)=95/5~50/50の質量比で含み、且つ分子量の分散度(Mw/Mn)が1.25~1.60である、スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を500~4800質量部と、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を20~60質量部とを含有する、吸収性物品である。 One aspect (aspect 1) of the present invention is an absorbent article having a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body positioned between the top sheet and the back sheet. The top sheet includes a gel-like composition on the surface on the skin surface side, and the gel-like composition has a weight average molecular weight of 100,000 or more and less than 180,000 and a block co-polymer weight of triblock or more. A styrene-based thermoplastic elastomer (A1) composed of a coalescence and a styrene-based thermoplastic elastomer (A2) composed of a block copolymer having a weight average molecular weight of 180,000 to 300,000 and having a triblock or more, (A1 ) / (A2) = 95/5 to 50/50 and a molecular weight dispersity (Mw / Mn) of 1.25 to 1.60. A) 100 parts by mass with respect to, and from 500 to 4800 parts by weight hydrocarbon oil kinematic viscosity of 5 ~ 50mm 2 / s and (B) at 37.8 ° C., a kinematic viscosity at 25 ° C. is 50 ~ 200mm 2 / s An absorbent article containing 20 to 60 parts by mass of the silicone oil (C).
 本発明の別の態様(態様2)では、上記態様1の吸収性物品において、前記ブロック共重合体が、分子鎖中にスチレン系ハードセグメントからなるブロック成分を2つ以上有する。 In another aspect (aspect 2) of the present invention, in the absorbent article according to aspect 1, the block copolymer has two or more block components composed of styrene hard segments in the molecular chain.
 本発明の更に別の態様(態様3)では、上記態様2の吸収性物品において、前記ブロック共重合体の分子鎖における少なくとも両末端のブロック成分が、前記スチレン系ハードセグメントからなるブロック成分である。 In yet another aspect (Aspect 3) of the present invention, in the absorbent article according to Aspect 2, the block components at least at both ends in the molecular chain of the block copolymer are block components composed of the styrenic hard segment. .
 本発明の更に別の態様(態様4)では、上記態様1~3のいずれか一つの吸収性物品において、前記ブロック共重合体が、スチレン-ブタジエン-スチレンブロック共重合体、スチレン-エチレン-ブチレン-スチレンブロック共重合体、スチレン-イソプレン-ブチレン-スチレンブロック共重合体、スチレン-イソプレン-スチレンブロック共重合体、スチレン-エチレン-プロピレン-スチレンブロック共重合体及びスチレン-エチレン-エチレン-プロピレンスチレンブロック共重合体からなる群から選択される少なくとも1種である。 In still another aspect (Aspect 4) of the present invention, in the absorbent article according to any one of Aspects 1 to 3, the block copolymer is a styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene. -Styrene block copolymer, styrene-isoprene-butylene-styrene block copolymer, styrene-isoprene-styrene block copolymer, styrene-ethylene-propylene-styrene block copolymer and styrene-ethylene-ethylene-propylene styrene block It is at least one selected from the group consisting of copolymers.
 本発明の更に別の態様(態様5)では、上記態様1~4のいずれか一つの吸収性物品において、前記炭化水素油(B)が、水添ポリイソブテン、流動パラフィン、スクワラン及びスクワレンからなる群から選択される少なくとも1種である。 In still another aspect (Aspect 5) of the present invention, in the absorbent article according to any one of Aspects 1 to 4, the hydrocarbon oil (B) is a group consisting of hydrogenated polyisobutene, liquid paraffin, squalane and squalene. Is at least one selected from
 本発明の更に別の態様(態様6)では、上記態様1~5のいずれか一つの吸収性物品において、前記シリコーンオイル(C)が、ジオルガノポリシロキサン又は環状シロキサンである。 In still another aspect (Aspect 6) of the present invention, in the absorbent article according to any one of Aspects 1 to 5, the silicone oil (C) is diorganopolysiloxane or cyclic siloxane.
 本発明の更に別の態様(態様7)では、上記態様1~6のいずれか一つの吸収性物品において、前記シリコーンオイル(C)が、ジメチルポリシロキサン、メチルフェニルポリシロキサン、シクロペンタシロキサンからなる群から選択される少なくとも1種である。 In still another aspect (Aspect 7) of the present invention, in the absorbent article according to any one of Aspects 1 to 6, the silicone oil (C) comprises dimethylpolysiloxane, methylphenylpolysiloxane, and cyclopentasiloxane. At least one selected from the group.
 本発明の更に別の態様(態様8)では、上記態様1~7のいずれか一つの吸収性物品において、前記ゲル状組成物は、前記トップシートの肌面側の表面に、平面視にて畝状又はドット状に塗工されたものである。 In still another aspect (Aspect 8) of the present invention, in the absorbent article according to any one of Aspects 1 to 7, the gel composition is formed on the skin surface side surface of the top sheet in a plan view. It is coated in a bowl or dot shape.
 本発明の更に別の態様(態様9)では、上記態様1~8のいずれか一つの吸収性物品において、前記吸収性物品が、生理用ナプキン、パンティーライナー、おむつ又は尿取りパッドである。 In still another aspect (Aspect 9) of the present invention, in the absorbent article according to any one of Aspects 1 to 8, the absorbent article is a sanitary napkin, a panty liner, a diaper, or a urine absorbing pad.
 本発明の更に別の態様(態様10)は、表面にゲル状組成物を有する不織布であって、前記ゲル状組成物は、重量平均分子量が10万以上18万未満であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A1)と、重量平均分子量が18万以上30万以下であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A2)とを、(A1)/(A2)=95/5~50/50の質量比で含み、且つ分子量の分散度(Mw/Mn)が1.25~1.60である、スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を500~4800質量部と、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を20~60質量部とを含有する、不織布である。 Yet another embodiment (embodiment 10) of the present invention is a non-woven fabric having a gel composition on the surface, the gel composition having a weight average molecular weight of 100,000 or more and less than 180,000, and triblock or more. A styrenic thermoplastic elastomer (A1) comprising a block copolymer of styrene, a styrene thermoplastic elastomer (A2) comprising a block copolymer having a weight average molecular weight of 180,000 to 300,000 and having a triblock or more; Styrene-based thermoplastic elastomer mixture in which (A1) / (A2) = 95/5 to 50/50 and the molecular weight dispersity (Mw / Mn) is 1.25 to 1.60 (A) 500 to 4800 parts by mass of a hydrocarbon oil (B) having a kinematic viscosity of 5 to 50 mm 2 / s at 37.8 ° C. with respect to 100 parts by mass and a kinematic viscosity at 25 ° C. of 50 to 20 A nonwoven fabric containing 20 to 60 parts by mass of silicone oil (C) at 0 mm 2 / s.
 1  吸収性物品
 2  トップシート
 3  吸収体
 4  サイドシート
 5  エンボス部
 6  ゲル状組成物
DESCRIPTION OF SYMBOLS 1 Absorbent article 2 Top sheet 3 Absorber 4 Side sheet 5 Embossed part 6 Gel-like composition

Claims (10)

  1.  液透過性のトップシートと、液不透過性のバックシートと、前記トップシート及び前記バックシートの間に位置する吸収体と、を有する吸収性物品であって、
     前記トップシートは、その肌面側の表面にゲル状組成物を含み、
     前記ゲル状組成物は、重量平均分子量が10万以上18万未満であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A1)と、重量平均分子量が18万以上30万以下であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A2)とを、(A1)/(A2)=95/5~50/50の質量比で含み、且つ分子量の分散度(Mw/Mn)が1.25~1.60である、スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、
     37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を500~4800質量部と、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を20~60質量部とを含有する、前記吸収性物品。
    An absorbent article comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber positioned between the top sheet and the back sheet,
    The top sheet includes a gel-like composition on the surface on the skin surface side,
    The gel composition has a weight average molecular weight of 100,000 or more and less than 180,000, and a styrenic thermoplastic elastomer (A1) composed of a block copolymer of triblock or more, and a weight average molecular weight of 180,000 or more and 300,000. And a styrene-based thermoplastic elastomer (A2) composed of a block copolymer of triblock or higher in a mass ratio of (A1) / (A2) = 95/5 to 50/50 and having a molecular weight of With respect to 100 parts by mass of the styrene-based thermoplastic elastomer mixture (A) having a dispersity (Mw / Mn) of 1.25 to 1.60,
    37.8 and 500 to 4800 parts by weight hydrocarbon oil kinematic viscosity of 5 ~ 50mm 2 / s and (B) at ° C., silicone oils kinematic viscosity at 25 ° C. is 50 ~ 200mm 2 / s and (C) The absorbent article comprising 20 to 60 parts by mass.
  2.  前記ブロック共重合体が、分子鎖中にスチレン系ハードセグメントからなるブロック成分を2つ以上有する、請求項1に記載の吸収性物品。 The absorptive article according to claim 1 in which said block copolymer has two or more block components which consist of a styrene system hard segment in a molecular chain.
  3.  前記ブロック共重合体の分子鎖における少なくとも両末端のブロック成分が、前記スチレン系ハードセグメントからなるブロック成分である、請求項2に記載の吸収性物品。 The absorbent article according to claim 2, wherein at least the block components at both ends of the molecular chain of the block copolymer are block components composed of the styrene hard segment.
  4.  前記ブロック共重合体が、スチレン-ブタジエン-スチレンブロック共重合体、スチレン-エチレン-ブチレン-スチレンブロック共重合体、スチレン-イソプレン-ブチレン-スチレンブロック共重合体、スチレン-イソプレン-スチレンブロック共重合体、スチレン-エチレン-プロピレン-スチレンブロック共重合体及びスチレン-エチレン-エチレン-プロピレンスチレンブロック共重合体からなる群から選択される少なくとも1種である、請求項1~3のいずれか一項に記載の吸収性物品。 The block copolymer is styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-isoprene-butylene-styrene block copolymer, styrene-isoprene-styrene block copolymer. The styrene-ethylene-propylene-styrene block copolymer and at least one selected from the group consisting of a styrene-ethylene-ethylene-propylene styrene block copolymer. Absorbent articles.
  5.  前記炭化水素油(B)が、水添ポリイソブテン、流動パラフィン、スクワラン及びスクワレンからなる群から選択される少なくとも1種である、請求項1~4のいずれか一項に記載の吸収性物品。 The absorbent article according to any one of claims 1 to 4, wherein the hydrocarbon oil (B) is at least one selected from the group consisting of hydrogenated polyisobutene, liquid paraffin, squalane and squalene.
  6.  前記シリコーンオイル(C)が、ジオルガノポリシロキサン又は環状シロキサンである、請求項1~5のいずれか一項に記載の吸収性物品。 The absorbent article according to any one of claims 1 to 5, wherein the silicone oil (C) is diorganopolysiloxane or cyclic siloxane.
  7.  前記シリコーンオイル(C)が、ジメチルポリシロキサン、メチルフェニルポリシロキサン、シクロペンタシロキサンからなる群から選択される少なくとも1種である、請求項1~6のいずれか一項に記載の吸収性物品。 The absorbent article according to any one of claims 1 to 6, wherein the silicone oil (C) is at least one selected from the group consisting of dimethylpolysiloxane, methylphenylpolysiloxane, and cyclopentasiloxane.
  8.  前記ゲル状組成物は、前記トップシートの肌面側の表面に、平面視にて畝状又はドット状に塗工されたものである、請求項1~7のいずれか一項に記載の吸収性物品。 The absorption according to any one of claims 1 to 7, wherein the gel-like composition is applied to the surface on the skin side of the top sheet in the form of a bowl or a dot in plan view. Sex goods.
  9.  前記吸収性物品が、生理用ナプキン、パンティーライナー、おむつ又は尿取りパッドである、請求項1~8のいずれか一項に記載の吸収性物品。 The absorbent article according to any one of claims 1 to 8, wherein the absorbent article is a sanitary napkin, a panty liner, a diaper or a urine removing pad.
  10.  表面にゲル状組成物を有する不織布であって、
     前記ゲル状組成物は、重量平均分子量が10万以上18万未満であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A1)と、重量平均分子量が18万以上30万以下であり、且つトリブロック以上のブロック共重合体からなるスチレン系熱可塑性エラストマー(A2)とを、(A1)/(A2)=95/5~50/50の質量比で含み、且つ分子量の分散度(Mw/Mn)が1.25~1.60である、スチレン系熱可塑性エラストマー混合物(A)100質量部に対し、
     37.8℃における動粘度が5~50mm2/sである炭化水素油(B)を500~4800質量部と、25℃における動粘度が50~200mm2/sであるシリコーンオイル(C)を20~60質量部とを含有する、前記不織布。
    A non-woven fabric having a gel composition on the surface,
    The gel composition has a weight average molecular weight of 100,000 or more and less than 180,000, and a styrenic thermoplastic elastomer (A1) composed of a block copolymer of triblock or more, and a weight average molecular weight of 180,000 or more and 300,000. And a styrene-based thermoplastic elastomer (A2) composed of a block copolymer of triblock or higher in a mass ratio of (A1) / (A2) = 95/5 to 50/50 and having a molecular weight of With respect to 100 parts by mass of the styrene-based thermoplastic elastomer mixture (A) having a dispersity (Mw / Mn) of 1.25 to 1.60,
    37.8 and 500 to 4800 parts by weight hydrocarbon oil kinematic viscosity of 5 ~ 50mm 2 / s and (B) at ° C., silicone oils kinematic viscosity at 25 ° C. is 50 ~ 200mm 2 / s and (C) The nonwoven fabric comprising 20 to 60 parts by mass.
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