WO2015186377A1 - Absorbent article - Google Patents
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- 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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- WIPO (PCT)
- Prior art keywords
- styrene
- block copolymer
- absorbent article
- thermoplastic elastomer
- gel
- Prior art date
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/51113—Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/47—Sanitary towels, incontinence pads or napkins
- A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/225—Mixtures of macromolecular compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
- A61L15/34—Oils, fats, waxes or natural resins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F2013/51059—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers being sprayed with chemicals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
- A61F13/51113—Topsheet, i.e. the permeable cover or layer facing the skin comprising an additive, e.g. lotion or odour control
- A61F2013/51117—Topsheet, 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
Description
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.
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)
(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。
(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).
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.
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.)
・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.)
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.)
・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.)
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.
(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
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
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
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。
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.
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.
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.
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
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
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
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
Claims (10)
- 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. - 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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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