WO2017094290A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
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- WO2017094290A1 WO2017094290A1 PCT/JP2016/073784 JP2016073784W WO2017094290A1 WO 2017094290 A1 WO2017094290 A1 WO 2017094290A1 JP 2016073784 W JP2016073784 W JP 2016073784W WO 2017094290 A1 WO2017094290 A1 WO 2017094290A1
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- absorbent article
- gel
- composition
- mass
- thermoplastic elastomer
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—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
Definitions
- the present invention relates to an absorbent article having a gel-like composition on the surface on the skin side, which has an appropriate hardness and can exhibit an excellent emollient effect without causing stickiness. Moreover, this invention relates to the nonwoven fabric which has the above-mentioned gel-like composition on the surface.
- 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 that is semisolid or solid at 20 ° C. and partially movable to the wearer's skin on at least a part of the outer surface of the topsheet. 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 an emollient and one selected from these mixtures, (ii) 5 to 90% fix the emollient on the outer surface of the face sheet 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 the immobilized substance der selected mixtures thereof There is a.
- the viscosity of the lotion coating is increased in this way, the active ingredient that exhibits the emollient effect is trapped inside, and in particular, the load on the lotion coating is reduced. If it is small, a sufficient amount of the oil agent is not released, and a satisfactory emollient effect may not be obtained.
- such a high-viscosity lotion coating has a risk of being inferior in wearing feeling because it is hard as a material applied to the top sheet of the absorbent article (that is, a material that directly contacts the skin). .
- Patent Document 2 discloses a gel composition exhibiting delayed elasticity with respect to gel hardness, elongation, and the like.
- the composition disclosed in Patent Document 2 includes a high molecular weight triblock styrene thermoplastic elastomer having a number average molecular weight of 130,000 or more and a low molecular weight triblock styrene heat having a number average molecular weight of 100,000 or less. It is a gel elastomer composed of a plastic elastomer and a softening agent.
- the high molecular weight triblock styrene elastomer absorbs and retains a large amount of softening agent, while ensuring the flexibility of the composition, and the low molecular weight triblock type.
- retarded elasticity is imparted by containing a styrenic elastomer, such a composition is still insufficient in terms of stickiness of the gel surface and release of contained components. It was.
- the present invention includes a gel-like composition on the surface having an appropriate hardness and capable of exhibiting an excellent emollient effect without causing stickiness by the oil agent being easily released even under a light load.
- An object is to provide an absorbent article.
- Another object of the present invention is to provide a non-woven fabric having a gel-like composition on the surface that has an appropriate hardness and can exhibit an excellent emollient effect without causing stickiness.
- the absorbent article which concerns on 1 aspect (aspect 1) of this invention is an absorbent article which contains a gel-like composition in the surface contact
- the said gel-like composition has a weight average molecular weight.
- a styrene-based thermoplastic elastomer (A1) composed of a block copolymer of 100,000 or more and less than 180,000 and a triblock or more, and a block copolymer having a weight average molecular weight of 180,000 or more and 300,000 or less and a triblock or more.
- the absorbent article of this aspect 1 since the gel composition contained in the surface that comes into contact with the skin surface of the wearer is composed of the specific composition, it has an appropriate hardness and is oily even under a light load. By being easily released, an excellent emollient effect can be exhibited without causing stickiness. Therefore, the absorbent article of aspect 1 can obtain an excellent wearing feeling and emollient effect as an absorbent article.
- An absorbent article according to another aspect (aspect 2) of the present invention is the absorbent article according to aspect 1, wherein the block copolymer has two or more block components composed of styrenic hard segments in the molecular chain. It is.
- the block copolymer contained in the above-described gel-like composition has two or more block components composed of styrene-based hard segments in the molecular chain.
- a hard gel can be easily obtained, and the oil agent can be easily released.
- the absorbent article according to yet another aspect (Aspect 3) of the present invention is the absorbent article according to Aspect 2, wherein at least the block components at both ends of the molecular chain of the block copolymer are composed of the styrenic hard segment. Block component.
- the block copolymer contained in the gel composition is a block in which block components at least at both ends in the molecular chain of the block copolymer are the styrenic hard segments. Since it is a component, it is easy to obtain a gel with an appropriate hardness, and the oil agent release is further improved.
- the absorbent article according to still another aspect (Aspect 4) of the present invention is the absorbent article according to any one of Aspects 1 to 3, wherein the aliphatic hydrocarbon oil (B) is hydrogenated polyisobutene.
- the aliphatic hydrocarbon oil (B) contained in the gel composition described above is hydrogenated polyisobutene, so that stickiness due to the oil released from the gel hardly occurs. Emollient effect can be exhibited more effectively.
- the fatty acid triglyceride (C) contained in the gel composition is composed of a saturated fatty acid triglyceride (c1) having 8 to 12 carbon atoms and an unsaturated fatty acid triglyceride having 14 to 22 carbon atoms. Since (c2) is contained in a predetermined mass ratio, a gel with a more appropriate hardness can be obtained and a more excellent emollient effect can be exhibited.
- An absorbent article according to another aspect (aspect 6) of the present invention is the absorbent article according to any one of aspects 1 to 5, wherein the absorbent article includes a liquid-permeable surface sheet, a liquid-impermeable sheet.
- a surface provided with a back sheet and an absorbent body positioned between the top sheet and the back sheet, and a surface in contact with the skin surface of the wearer is a skin side surface of the top sheet.
- the gel composition composed of the above specific composition is included in the surface on the skin surface side of the surface sheet that is most likely to come into contact with the skin surface of the wearer.
- the effect of the gel composition can be more reliably exhibited.
- the absorbent article according to still another aspect (Aspect 7) of the present invention is the absorbent article according to Aspect 6, wherein the gel composition is in the form of a bowl on the skin side surface of the top sheet in plan view. Alternatively, they are arranged in a dot shape.
- the gel-like composition described above has a hydrophobic property on the surface on the skin surface side of the topsheet, in which the above-described gel-like composition is arranged in a bowl shape or a dot shape in a plan view.
- the absorbent article of the present embodiment 6 can obtain not only the effects relating to the gel hardness and emollient effect described above, but also excellent liquid permeability and liquid repellency as an absorbent article.
- the absorbent article according to still another aspect (Aspect 8) of the present invention is the absorbent article according to any one of Aspects 1 to 7, wherein the absorbent article is a sanitary napkin, panty liner, diaper or urine absorbing pad. It is.
- the absorbent article is a sanitary napkin, panty liner, diaper, or urine absorbing pad, and is applied to the skin surface particularly sensitive to irritation.
- the effect exhibited by the gel composition can be more suitably enjoyed.
- Yet another embodiment (embodiment 9) of the present invention is a non-woven fabric having a gel composition on the surface, wherein the gel composition has 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;
- a mass ratio of (A1) / (A2) 95/5 to 50/50, the kinematic viscosity at 37.8 ° C.
- styrene-based thermoplastic elastomer mixture A
- the nonwoven fabric of this aspect 9 since the gel-like composition contained on the surface is composed of the above-mentioned specific composition, it has an appropriate hardness, and the oil agent is easily released even under a light load. An excellent emollient effect can be exerted without producing any. Therefore, the nonwoven fabric of aspect 8 can provide a comfortable feeling of use, a feeling of wear, and an emollient effect to the nonwoven fabric or a product using the nonwoven fabric.
- the gel composition having a suitable hardness and capable of exhibiting an excellent emollient effect without causing stickiness due to the oil agent being easily released even under a light load is included on the surface.
- An absorbent article and a non-woven fabric having the gel composition on the surface can be provided.
- FIG. 1 is a plan view showing a sanitary napkin 1 according to an embodiment of the present invention.
- FIG. 2 is a plan view showing a sanitary napkin 1 ′ according to another embodiment of the present invention.
- a target object for example, an absorbent article, a nonwoven fabric, etc. placed on a horizontal surface in an unfolded state from the upper side in the vertical direction is the thickness direction of the target object.
- "Looking at” is simply called “plan view”.
- width direction W refers to “a direction in which the length of a vertically long object in a plan view is short (short direction)
- long direction L refers to “a vertically long object in a plan view”
- Thinness direction refers to "perpendicular to an object placed on a horizontal plane in the unfolded state”
- FIG. 1 is a plan view showing a sanitary napkin 1 (absorbent article) according to an embodiment of the present invention.
- the sanitary napkin 1 according to the present embodiment has a vertically long shape whose overall outer shape is long in the longitudinal direction L in a plan view, and further, a center in the longitudinal direction L.
- the outer edge of the portion has a shape protruding in a substantially trapezoidal shape toward the outer side in the width direction W.
- the sanitary napkin 1 has side sheets 4 extending along the longitudinal direction L at both ends in the width direction, and extends in the longitudinal direction L at both ends in the width direction.
- an embossed portion 5 extending along the outer edge.
- the sanitary napkin 1 includes a liquid-permeable top sheet 2 positioned on the skin surface side, a liquid-impermeable back sheet (not shown) positioned on the non-skin surface side, and these in the thickness direction.
- An absorbent body 3 positioned between the sheets, and the top sheet 2 has a plurality of bowl-shaped gel-like compositions extending along the longitudinal direction L on the skin surface side. 6 is included.
- the gel composition composed of such a specific composition has an appropriate hardness and exhibits an excellent emollient effect without causing stickiness by the oil agent being easily released even under a light load. Therefore, when such a gel-like composition is contained in the surface which contact
- the styrenic thermoplastic elastomer (A1, A2) used in the gel composition is a block copolymer of a triblock or more containing a styrene hard segment and a soft segment.
- the terminal block component is a block copolymer which is a block component composed of the styrenic hard segment.
- the styrene hard segment is not particularly limited, and examples thereof include polystyrene, poly ( ⁇ -methylstyrene), poly (o-methylstyrene), poly (m-methylstyrene), and poly (p-methylstyrene).
- Styrenic polymer is mentioned.
- the soft segment is not particularly limited, and examples thereof include olefin polymers such as polyethylene, polypropylene, polybutylene, polybutadiene, and polyisoprene.
- a block component composed of a styrene hard segment may be referred to as a “styrene block component”, and a block component composed of an olefin soft segment may be referred to as an “olefin block component”.
- 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
- styrene-ethylene-butylene-styrene block copolymer SEBS
- styrene-ethylene-propylene-styrene block copolymer SEEPS
- 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.
- a network-like network structure is considered to have a function of retaining an oil agent (that is, an aliphatic hydrocarbon oil (B) and a fatty acid triglyceride (C)), which will be described later, while appropriately releasing it. It is done.
- 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.
- the amount of the styrenic block component is less than 10% by mass, the amount of the styrenic block component that forms the aggregation domain decreases, and thus the styrenic thermoplastic elastomer does not easily form the above-described network network structure. .
- 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 topsheet becomes hard, and there is a possibility that the wearing feeling of the absorbent article is 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.
- the styrene-based thermoplastic elastomer (A1) having the lower weight average molecular weight (hereinafter referred to as “low-molecular-weight styrene-based 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 of the gel after being applied to the top sheet is reduced (that is, the gel becomes too soft).
- the styrene-based thermoplastic elastomer (A2) having the higher weight average molecular weight hereinafter referred to as “high-molecular-weight styrene-based thermoplastic elastomer (A2)”).
- the weight average molecular weight is 180,000 to 300,000, preferably 220,000 to 280,000. When this weight average molecular weight exceeds 300,000, the hardness of the gel may decrease (that is, the gel may become too soft) or stickiness may occur.
- 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. Preferably there is. When the degree of dispersion is within such a range, the gel is likely to have an appropriate hardness and the oil agent is easily released in an appropriate amount.
- the weight average molecular weights (Mw) of the two types of styrene-based thermoplastic elastomers (A1, A2) and the styrene-based thermoplastic elastomer mixture (A), and the dispersity (Mw) of the styrene-based thermoplastic elastomer mixture (A) / 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 styrenic thermoplastic elastomer (A1) exceeds 95 in the mass ratio, the gel hardness after application to the top sheet becomes insufficient, and the blending ratio is less than 50. The amount of oil released from the gel may be reduced.
- the gel composition further includes an aliphatic hydrocarbon oil (B) having a kinematic viscosity at 37.8 ° C. of 5 to 50 mm 2 / s.
- the aliphatic hydrocarbon oil (B) is not particularly limited as long as it is an aliphatic compound composed of carbon and hydrogen, and may be any of a saturated aliphatic hydrocarbon oil and an unsaturated aliphatic hydrocarbon oil.
- saturated aliphatic hydrocarbon oil examples include liquid paraffin, hydrogenated polyisobutene, ⁇ -olefin oligomer, squalane and the like.
- unsaturated aliphatic hydrocarbon oil examples include squalene and polybutene.
- hydrogenated polyisobutene is particularly preferably used as the aliphatic hydrocarbon oil (B) because stickiness due to the released oil agent hardly occurs and the above-mentioned emollient effect can be more effectively exhibited. it can.
- the aliphatic hydrocarbon oil (B) is in the range kinematic viscosity of 5 ⁇ 50mm 2 / s at 37.8 ° C., preferably in the range of 10 ⁇ 30mm 2 / s, more preferably 10 ⁇ 20 mm 2 Within the range of / s. If the kinematic viscosity is less than 5 mm 2 / s, the aliphatic hydrocarbon oil (B) is likely to volatilize during the production of the gel composition, and there is a risk that the physical properties of the gel after application to the topsheet will vary. There is.
- kinematic viscosity exceeds 50 mm 2 / s, the gel after being applied to the top sheet becomes hard, and the amount of oil released is reduced.
- the kinematic viscosity of the aliphatic hydrocarbon oil (B) is measured at a test temperature of 37.8 ° C. using a Canon Fenceke viscometer according to “5. Kinematic viscosity test method” of JIS K 2283: 2000. Can be obtained.
- the blending amount of the aliphatic hydrocarbon oil (B) is in the range of 500 to 4800 parts by weight, preferably 800 to 3000 parts by weight, with respect to 100 parts by weight of the styrenic thermoplastic elastomer mixture (A). Within the range, more preferably within 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. 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.
- the gel composition is liquid at 20 ° C. (that is, normal temperature) and further contains a fatty acid triglyceride (C) having 8 to 22 carbon atoms.
- the fatty acid triglyceride used in the present invention is, for example, a dehydration synthesis reaction of glycerin and one or more fatty acids in the absence of a catalyst, or a transesterification reaction between glycerin and one or more fatty acid alcohol esters. By doing so, it can be obtained.
- saturated fatty acid triglycerides (c1) having 8 to 12 carbon atoms using saturated fatty acids such as capric acid, caprylic acid, and lauric acid.
- Specific examples of commercially available products include Panacet (trade name) manufactured by NOF Corporation, Coconut (trade name) manufactured by Kao Corporation, ODO manufactured by Nisshin Oilio Co., Ltd., and the like.
- examples of fatty acid triglycerides that can be used in the present invention include unsaturated fatty acid triglycerides (c2) having 14 to 22 carbon atoms such as triglycerides of oleic acid.
- Specific examples of commercially available products include olive oil, soybean oil, cocoon oil, sunflower oil, rapeseed oil, sesame oil, corn oil, cottonseed oil, safflower oil, jojoba oil, sunflower oil, and the like.
- olive oil, coconut oil and sunflower oil containing oleic acid triglyceride in a proportion of 70% by mass or more are particularly preferable.
- the blending amount of the fatty acid triglyceride (C) is in the range of 60 to 1000 parts by weight, preferably in the range of 80 to 900, more preferably 100 parts by weight of the styrene thermoplastic elastomer mixture (A). Is in the range of 100 to 700 parts by weight. If the blending amount is less than 60 parts by mass, the amount of oil released will be reduced. On the other hand, if it exceeds 1000 parts by mass, the amount of oil released will increase so much that stickiness may occur.
- fatty acid triglyceride (C) it is preferable to use a mixture of the above-mentioned two types of fatty acid triglycerides (c1, c2) having different carbon numbers.
- These specific blending amounts include a saturated fatty acid triglyceride (c1) having 8 to 12 carbon atoms and an unsaturated fatty acid triglyceride (c2) having 14 to 28 carbon atoms from the viewpoint of improving gel hardness and emollient effect.
- c1 saturated fatty acid triglyceride
- c2 unsaturated fatty acid triglyceride
- Are preferably contained in a mass ratio within the range of (c1) / (c2) 95/5 to 50/50.
- the fatty acid triglyceride (C) contains a saturated fatty acid triglyceride (c1) having 8 to 12 carbon atoms and an unsaturated fatty acid triglyceride (c2) having 14 to 22 carbon atoms in a mass ratio within the above range.
- a gel having a more appropriate hardness can be obtained, and a more excellent emollient effect can be exhibited.
- the gel composition is added to the styrenic thermoplastic elastomer mixture (A), the aliphatic hydrocarbon oil (B) and the fatty acid triglyceride (C) in order to further improve the effects of the present invention.
- silicone oil (D) may further be contained.
- the blending amount of the silicone oil (D) is preferably in the range of 5 to 60 parts by mass with respect to 100 parts by mass of the styrene thermoplastic elastomer mixture (A).
- the said gel-like composition may contain the other additive used for general cosmetics, a lotion, etc. in the range which does not impair the effect of this invention.
- additives include antioxidants, light stabilizers, colorants, pigments, and fragrances.
- the gel composition used in the present invention can be produced by adding the above-mentioned various components simultaneously or in any order and melt-mixing them.
- the melt mixing means is not particularly limited, and any known means can be adopted. Examples of such means include means using a mixing device such as a single screw extruder, a twin screw extruder, a roll, a Banbury mixer, various kneaders, and a compounding pot.
- the gel composition used in the present invention is excellent in hardness and elongation, and has an appropriate release property (sustained release property) of the oil, so that it can be applied while suppressing adhesion to various coating devices or molding devices. Or arbitrary shaping
- molding for example, extrusion molding, injection molding, dipping molding, etc.
- 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, it is possible to easily stack and integrate various substrates such as nonwoven fabric, paper, fabric, olefin resin, and PET resin by coating or molding.
- the gel-like composition comprised by the above specific compositions is arrange
- the surface in contact with the skin surface of the wearer is not only the surface that actually contacts the skin surface of the wearer when the wearer wears the absorbent article of the present invention, It includes a surface that can abut when subjected to body pressure.
- a surface in addition to the surface on the skin side of the above surface sheet, for example, a skin surface such as a side sheet (see the side sheet 4 of the sanitary napkin 1 according to the above embodiment) or a three-dimensional gather sheet. The surface of the side etc. are mentioned.
- the said gel-like composition 6 is arrange
- the said gel-like composition 6 is along the longitudinal direction L of the said sanitary napkin 1 by planar view in the surface by the side of the skin surface of the surface sheet 2.
- FIG. Are arranged in the form of a plurality of bowls that extend continuously and are arranged at predetermined intervals in the width direction W (see FIG. 1).
- the arrangement form of the gel-like composition is not limited to this.
- the gel-like composition is spread over the entire area in the longitudinal direction L of the absorbent article (that is, the longitudinal direction). (Over both ends of L), may be discontinuously (intermittently) disposed, or is disposed continuously or discontinuously in a partial region in the longitudinal direction L of the absorbent article. Also good.
- FIG. 2 is a plan view showing a sanitary napkin 1 ′ (absorbent article) according to another embodiment of the present invention.
- the same members as the sanitary napkin 1 shown in FIG. 1 for example, the surface sheet 2 and the absorbent body 3) are denoted by the same reference numerals.
- the gel-like composition 6 ′ is arranged in a plurality of dot-like forms arranged in a staggered manner in a plan view on the surface of the surface sheet 2 on the skin surface side. ing.
- the gel-like composition when the gel-like composition is arranged in a bowl-like or dot-like shape in plan view, the gel-like composition having hydrophobicity on the surface on the skin side of the topsheet And a non-arrangement region of the gel composition are formed, so that the gel has an exclusive action on water (liquid excrement such as urine) due to hydrophobicity in the arrangement region of the gel composition, and the gel
- the liquid excrement such as urine supplied on the skin side surface of the surface sheet by the synergistic action with the water absorption action due to the hydrophilicity inside the surface sheet in the non-arranged region of the surface composition is the gel composition Through this non-arranged region, it is possible to form a state of being easily drawn into the top sheet.
- the gel composition is disposed in a region where the surface sheet and the absorber overlap in plan view (that is, a region overlapping in the thickness direction) at an area ratio of 1 to 50% of the region.
- the area ratio is more preferably 3 to 40% of the area, and the area ratio of 5 to 30% of the area is particularly preferable.
- the gel-like composition when the gel-like composition is arranged at an area ratio exceeding 50% of the area, the area on the top sheet where the gel-like composition is arranged does not absorb liquid excreta, There is a possibility that the area where the liquid excretion can be absorbed in the sheet becomes too small, and the absorbent performance of the absorbent article is lowered.
- the topsheet is preferably a gel composition of the above 1 ⁇ 30g / m 2, more preferably 2 ⁇ 20g / m 2, particularly preferably at a content of 3 ⁇ 10g / m 2 .
- content of the said gel-like composition can be calculated
- Method for measuring content of gel composition contained in surface sheet (1) A predetermined range to be measured on the surface sheet on which the gel-like composition is arranged is cut out using a sharp blade such as a cutter blade so as not to change its thickness, and the content measurement is performed. Get a sample for. (2) The area: SA (m 2 ) and mass: SM 0 (g) of the cut sample are measured.
- 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 method of disposing the above-described gel composition on the surface of the absorbent article is not particularly limited, and any known coating method is adopted. be able to.
- the gel composition is absorbed 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 coating apparatus such as a contact type coater. It can be applied to the surface of a functional article.
- the gel composition may be applied when producing a material for a surface sheet such as a nonwoven fabric, or may be applied on the surface sheet in an absorbent article production line. From the viewpoint of suppressing the gel composition, the gel composition is preferably applied on the surface sheet in the production line of the absorbent article. In the downstream process (for example, immediately before the process of individually packing the products, etc.), it is preferable to apply on the surface sheet.
- a sheet-like fiber structure such as a nonwoven fabric or a woven fabric
- the fibers constituting the nonwoven fabric or the woven fabric include natural fibers and chemical fibers, and more specifically, cellulose fibers such as pulverized pulp and cotton.
- Regenerated cellulose such as rayon and fibril rayon; semi-synthetic cellulose such as acetate and triacetate; thermoplastic hydrophobic chemical fiber; and thermoplastic hydrophobic chemical fiber subjected to hydrophilization treatment.
- thermoplastic hydrophobic chemical fiber examples include fibers made of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and the like, fibers made of a graft polymer of PE and PP, 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 hydrophilic agent, a method of coating the surface of the 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.
- the liquid-impermeable back sheet is a film containing PE, PP, etc., a resin film having air permeability, and a non-woven fabric such as spunbond or spunlace bonded with a resin film having air permeability.
- Laminated bodies, multilayer nonwoven fabrics such as SMS, and the like can be used.
- a low density polyethylene (LDPE) film having a basis weight of about 15 to about 30 g / m 2 is preferable.
- the absorbent article is an intermediate sheet having liquid diffusibility in the surface direction (particularly, the longitudinal direction L) between the top sheet and the absorber and / or between the back sheet and the absorber.
- an intermediate sheet a sheet similar to the sheet-like fiber structure constituting the above-described surface sheet can be used.
- the absorber is not particularly limited, and any absorber known in the art can be used.
- the absorbent body that can be used in the absorbent article of the present invention include those in which an absorbent core made of an absorbent material is covered with a hydrophilic core wrap sheet.
- the absorbent material constituting the absorbent core include hydrophilic fibers and superabsorbent polymers.
- cellulose such as pulverized pulp and cotton; regenerated cellulose such as rayon and fibrillar rayon; Semi-synthetic cellulose such as acetate and triacetate; Hydrophobized thermoplastic hydrophobic chemical fiber; Granules made of superabsorbent polymer such as sodium acrylate copolymer; and any combination of two or more of these.
- the core wrap sheet has liquid permeability that allows liquid excretion such as body fluid discharged from the human body to permeate, and does not allow the absorbent core contained in the sheet to permeate.
- liquid permeability that allows liquid excretion such as body fluid discharged from the human body to permeate, and does not allow the absorbent core contained in the sheet to permeate.
- sheet-like fiber structures such as a tissue, a nonwoven fabric, and a woven fabric, are mentioned.
- an absorptive sheet if it is used for common absorptive articles, such as a sanitary napkin, it can be especially used without a restriction.
- the present invention can be applied to various absorbent articles such as panty liners, diapers, and (light) incontinence pads in addition to the sanitary napkin of the above-described embodiment.
- absorbent articles such as sanitary napkins, panty liners, diapers, or urine-absorbing pads are applied to the skin surface particularly sensitive to irritation. The effect to be enjoyed can be enjoyed more suitably.
- this invention is applicable also to a nonwoven fabric other than the above-mentioned absorbent article.
- the nonwoven fabric in this invention has the gel-like composition comprised by the said specific composition in at least one part of the area
- the gel composition composed of the above-mentioned specific composition has an appropriate hardness and can exhibit an excellent emollient effect without causing stickiness due to the oil agent being easily released even under a light load. Therefore, the nonwoven fabric of the present invention having such a gel composition on the surface can provide a comfortable feeling of use, a feeling of wearing, and an emollient effect to the nonwoven fabric or a product using the nonwoven fabric.
- the above-described gel-like composition has a form similar to the above-described sanitary napkin embodiment (that is, a cocoon or dot) in at least a part of the region that can be in direct contact with the user's skin. Shape).
- a mask, wet tissue, etc. are mentioned, for example.
- Styrenic thermoplastic elastomer (A1, A2) a) Low molecular weight styrenic thermoplastic elastomer (A1) ⁇ Septon 8004 (styrene-ethylene-butylene-styrene block copolymer (SEBS) with Mw of 110,000, manufactured by Kuraray Co., Ltd.) b) 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.)
- C Fatty acid triglycerides
- Panasate 810S Capric acid, fatty acid triglyceride of caprylic acid, manufactured by NOF Corporation
- Olive oil refined Oil, manufactured by DSP Gokyo & Food Chemical Co., Ltd.
- Rapeseed birch oil Rapeseed oil, Showa Sangyo Co., Ltd.
- a test piece made of a columnar gel having a diameter of 40 mm and a thickness of 8 mm was produced using the obtained gel composition.
- a commercially available tissue paper (a set of two sheets) whose mass (W 1 ) has been measured in advance is placed on the upper surface of the prepared test piece, and a load of 10 g is applied from above the tissue paper to room temperature (23 ° C.). Then, the tissue paper was removed and its mass (W 2 ) was measured. Then, based on the following formula (2), the mass increase of the tissue paper is calculated from the mass (W 1 ) of the tissue paper measured in advance and the mass (W 2 ) of the tissue paper measured after being left for 24 hours.
- Mass increase rate (release amount) is 2% or more and 10% or less
- Mass increase rate (release amount) is less than 2% or exceeds 10%
- the emollient effect means to the subject that “the action of softening the skin by suppressing the transpiration of moisture from the skin by the action of the oily film”. I explained in advance.
- the absorbent articles of Examples 1 to 9 are gel composition Nos. Used. Good results were shown in all evaluations of physical properties tests and sensory tests of 1-1 to 1-9.
- the gel composition No. used was used for the absorbent article of Example 8. 1-8 was excellent in oil agent release, and high evaluation results were obtained for the emollient effect in sensory evaluation of absorbent articles.
- the gel composition No. used was used for the absorbent article of Example 9. In spite of the small amount of fatty acid triglyceride (C) in 1-9, the oil agent was excellent in releasability, and a high evaluation result was obtained for the emollient effect in the sensory evaluation of the absorbent article.
- the absorbent article of Comparative Example 1 has the gel composition No. used. Since 2-1 contained only a low molecular weight styrene thermoplastic elastomer (A1) as a styrene thermoplastic elastomer, the gel was hard and the softness and emollient effect were also evaluated in the sensory evaluation of absorbent articles. Insufficient evaluation results were obtained.
- the absorbent article of Comparative Example 2 is the gel composition No. used.
- the gel becomes hard and the oil agent As a result, the amount released was too small, and in the sensory evaluation of the absorbent article, the gel was hard and the emollient effect was not felt.
- the absorbent article of Comparative Example 3 has the gel composition No. used.
- the absorbent article of Comparative Example 4 has the gel composition No. used. Since the weight average molecular weight of the low molecular weight styrenic thermoplastic elastomer mixture (A1 ′) in 2-4 was outside the range of 100,000 to less than 180,000, the gel hardness was too soft and the amount of oil released As a result, too much was found, and stickiness was also felt in the sensory evaluation of the absorbent article.
- the absorbent article of Comparative Example 5 has the gel composition No. used.
- the absorbent article of Comparative Example 6 was obtained by using the gel composition No. used. 2-6 did not contain fatty acid triglyceride (C) (that is, it contained no components other than the styrenic thermoplastic elastomer mixture (A) and the aliphatic hydrocarbon oil (B)), and release of the oil agent The emollient effect was not felt in the sensory evaluation of the absorbent article.
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Abstract
Description
本明細書において、「幅方向W」は、「平面視における縦長の対象物の長さの短い方向(短手方向)」を指し、「長手方向L」は、「平面視における縦長の対象物の長さの長い方向」を指し、「厚さ方向」は、「展開した状態で水平面上に置いた対象物に対して垂直方向」を指し、これらの幅方向W、長手方向L及び厚さ方向は、それぞれ互いに直交する関係にある。さらに、本明細書では、「縦長の対象物(例えば、吸収性物品、不織布等)の幅方向Wにおいて、長手方向Lに延びる幅方向中央軸線に対して相対的に近位側」を「幅方向の内方側」といい、「前記縦長の対象物の幅方向Wにおいて、前記幅方向中央軸線に対して相対的に遠位側」を「幅方向の外方側」という。
また、本明細書では、特に断りのない限り、吸収性物品の厚さ方向において、「吸収性物品の着用時に、着用者の肌面に対して相対的に近位側」を「肌面側」といい、「吸収性物品の着用時に、着用者の肌面に対して相対的に遠位側」を「非肌面側」という。
また、生理用ナプキン1は、厚さ方向において、肌面側に位置する液透過性の表面シート2と、非肌面側に位置する液不透過性の裏面シート(図示せず)と、これら各シートの間に位置する吸収体3と、を備えていて、さらに、前記表面シート2は、その肌面側の表面において、長手方向Lに沿って延びる複数本の畝状のゲル状組成物6を含んでいる。
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である脂肪族炭化水素油(B)を500~4800質量部と、20℃で液体である炭素数8~22の脂肪酸トリグリセリド(C)を60~1000質量部とを含有するものである。このような特定の組成で構成されたゲル状組成物は、適度な硬さを有するとともに、軽い負荷でも油剤が容易に放出されることにより、べたつきを生じることなく優れたエモリエント効果を発揮することができるため、このようなゲル状組成物が、吸収性物品の着用者の肌面と当接する表面に含まれていると、吸収性物品として優れた着用感及びエモリエント効果を得ることができる。
装置 :GPC-8220 (東ソー(株)製)
カラム :Shodex LF-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)
さらに、本発明に用い得る脂肪酸トリグリセリドとしては、オレイン酸のトリグリセリド等の炭素数14~22の不飽和脂肪酸トリグリセリド(c2)が挙げられる。具体的な市販品の例としては、例えば、オリーブ油、大豆油、椿油、ヒマワリ油、菜種油、ゴマ油、コーン油、綿実油、紅花油、ホホバ油、ヒマワリ油などが挙げられる。これらの中でも、オレイン酸トリグリセリドを70質量%以上の割合で含有している、オリーブ油、椿油及びヒマワリ油が特に好ましい。
本発明の一実施形態に係る生理用ナプキン1では、前記ゲル状組成物6は、表面シート2の肌面側の表面に配置されている。このように前記ゲル状組成物が着用者の肌面に最も接触しやすい表面シートの肌面側の表面に配置されていると、上述のゲル状組成物による効果を、より確実に発揮することができる。
[表面シートに含まれるゲル状組成物の含有量の測定方法]
(1)ゲル状組成物が配置された表面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。
本発明の吸収性物品において、液透過性の表面シートは、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。前記表面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、例えば、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。
本発明の吸収性物品において、液不透過性の裏面シートは、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を用いることができる。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)フィルムなどが好ましい。
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。本発明の吸収性物品に用い得る吸収体の例としては、吸収性材料によって構成される吸収コアを、親水性を有するコアラップシートで覆ったものなどが挙げられる。前記吸収コアを構成する吸収性材料としては、例えば、親水性繊維や高吸収性ポリマーなどが挙げられ、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;親水化処理された熱可塑性疎水性化学繊維;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、及びこれら2種以上の任意の組み合わせなどが挙げられる。
上記特定の組成で構成されたゲル状組成物は、適度な硬さを有するとともに、軽い負荷でも油剤が容易に放出されることにより、べたつきを生じることなく優れたエモリエント効果を発揮することができるものであるため、このようなゲル状組成物を表面に有する本発明の不織布は、当該不織布又は当該不織布を用いた製品に、快適な使用感や着用感、エモリエント効果を提供することができる。
a)低分子量のスチレン系熱可塑性エラストマー(A1)
・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)
b)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)
・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)
a)脂肪族炭化水素油(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)
b)脂肪族炭化水素油(B’)
・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、(株)MORESCO製)
・パナセート810S(カプリン酸、カプリル酸の脂肪酸トリグリセリド、日油(株)製)
・オリーブ油リファインド(オリーブ油、DSP五協&フードケミカル(株)製)
・菜種白鮫油(菜種油、昭和産業(株)製)
・サラスコ816T(2-エチルヘキサン酸セチル、日清オイリオグループ(株)製)
・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)
上記の各種配合成分を、下記の表1に示す各配合量でセパラブルフラスコに仕込み、内容物を撹拌しながら130℃で5時間溶融混合した後、冷却して、ゲル状組成物No.1-1~1-9及び2-1~2-6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により評価した。なお、各ゲル状組成物の組成及び物性(重量平均分子量及び分散度)については表1に示し、各種試験方法による評価結果については表2に示す。
[物性試験]
(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((株)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。なお、測定結果及び評価結果は、以下の表2に示す。
○: 10N以上、40N以下
×: 10N未満又は40Nを超える
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。作製した試験片の上面に、予め質量(W1)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、該ティッシュペーパーの上から10g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(W2)を測定した。そして、予め測定しておいたティッシュペーパーの質量(W1)と、24時間放置した後に測定したティッシュペーパーの質量(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、さらに、該質量増加率(%)を放出量として、以下の基準により評価した。なお、測定結果及び評価結果は、以下の表2に示す。
×: 質量増加率(放出量)が2%未満又は10%を超える
上記のようにして得られたゲル状組成物No.1-1~1-9及び2-1~2-6を、市販の生理用ナプキンの表面シートの肌面側の表面に、長手方向に延びる複数本の畝状に塗工することにより、実施例1~9及び比較例1~6の吸収性物品(生理用ナプキン)を得た。
[官能試験]
上記のようにして得られた実施例1~9及び比較例1~6の吸収性物品を23℃で一晩放置した後、前記吸収性物品における表面シートの肌面側の表面を指で左右に10往復させたときの触感について、「柔らかさ」及び「べたつき」の観点から評価した。また、前記表面シートの肌面側の表面(すなわち、ゲル状組成物が塗工された表面)を手の甲に付着させて15分間放置した後、肌の状態を確認し、「エモリエント効果」を評価した。これらの評価は、10人の被験者に実施してもらい、以下の各評価基準に従ってアンケートを行った。このアンケートの結果は、10人の合計点により評価した。
なお、上述のエモリエント効果の評価にあたっては、被験者に対して、エモリエント効果が、「油性の膜の働きで肌からの水分の蒸散が抑えられることにより、皮膚を柔らかくする作用」を意味することを事前に説明した。
3点: 弾力があり、柔らかい
2点: 弾力があるが、硬い
1点: 弾力がなく硬い、又は弾力がなく柔らかい
3点: 油剤で指がべたつかない
2点: 油剤で指がべたつく
1点: 指が濡れない
3点: エモリエント効果が感じられる
2点: エモリエント効果があまり感じられない
1点: エモリエント効果がまったく感じられない
<合計点の評価>
◎: 合計点が26点以上
○: 合計点が21点以上、26点未満
△: 合計点が15点以上、21点未満
×: 合計点が15点未満
また、比較例2の吸収性物品は、用いたゲル状組成物No.2-2において、脂肪族炭化水素油(B)の粘度が5~50mm2/sの範囲外であり、脂肪酸トリグリセリド(C)を含有していなかったため、ゲルの硬さが硬くなり、油剤の放出量も少なくなり過ぎる結果となり、吸収性物品の官能評価においても、ゲルの硬さが硬く、エモリエント効果も感じられなかった。
比較例3の吸収性物品は、用いたゲル状組成物No.2-3において、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、ゲルの硬さが柔らか過ぎる結果となり、吸収性物品の官能評価においても、柔らかさ、べたつき及びエモリエント効果のすべてについて不十分な評価結果が得られた。
比較例4の吸収性物品は、用いたゲル状組成物No.2-4における低分子量のスチレン系熱可塑性エラストマー混合物(A1’)の重量平均分子量が10万以上18万未満の範囲外であったため、ゲルの硬さが柔らかくなり過ぎ、また、油剤の放出量も多くなり過ぎる結果となり、吸収性物品の官能評価においても、べたつきが感じられた。
比較例5の吸収性物品は、用いたゲル状組成物No.2-5が脂肪酸トリグリセリド(C)の代わりにエステル油を含有していたため、油剤の放出性が悪く、吸収性物品の官能評価においても、エモリエント効果が感じられなかった。
さらに、比較例6の吸収性物品は、用いたゲル状組成物No.2-6が脂肪酸トリグリセリド(C)を含んでいなかったため(すなわち、スチレン系熱可塑性エラストマー混合物(A)及び脂肪族炭化水素油(B)以外の成分は含有していなかったため)、油剤の放出性が見られず、吸収性物品の官能評価においても、エモリエント効果が感じられなかった。
2 表面シート
3 吸収体
4 サイドシート
5 エンボス部
6 ゲル状組成物
Claims (9)
- 着用者の肌面と当接する表面にゲル状組成物を含む吸収性物品であって、
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の質量比で含む、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である脂肪族炭化水素油(B)を500~4800質量部と、20℃で液体である炭素数8~22の脂肪酸トリグリセリド(C)を60~1000質量部とを含有する、前記吸収性物品。 - 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。
- 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。
- 前記脂肪族炭化水素油(B)が、水添ポリイソブテンである、請求項1~3のいずれか一項に記載の吸収性物品。
- 前記脂肪酸トリグリセリド(C)が、炭素数8~12の飽和脂肪酸トリグリセリド(c1)と、炭素数14~22の不飽和脂肪酸トリグリセリド(c2)とを、(c1)/(c2)=95/5~50/50の質量比で含有する、請求項1~4のいずれか一項に記載の吸収性物品。
- 前記吸収性物品は、液透過性の表面シートと、液不透過性の裏面シートと、前記表面シート及び前記裏面シートの間に位置する吸収体と、を備え、
前記着用者の肌面と当接する表面が、前記表面シートの肌面側の表面である、請求項1~5のいずれか一項に記載の吸収性物品。 - 前記ゲル状組成物が、前記表面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配置されている、請求項6に記載の吸収性物品。
- 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1~7のいずれか一項に記載の吸収性物品。
- 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の質量比で含む、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である脂肪族炭化水素油(B)を500~4800質量部と、20℃で液体である炭素数8~22の脂肪酸トリグリセリド(C)を60~1000質量部とを含有する、前記不織布。
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AU2016364173A AU2016364173B9 (en) | 2015-12-04 | 2016-08-12 | Absorbent article |
CN201680062122.0A CN108348364B (zh) | 2015-12-04 | 2016-08-12 | 吸收性物品 |
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Cited By (4)
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JP2017214683A (ja) * | 2016-05-31 | 2017-12-07 | 花王株式会社 | 不織布 |
WO2021132618A1 (ja) * | 2019-12-27 | 2021-07-01 | ユニ・チャーム株式会社 | 吸収性物品 |
JP2021106709A (ja) * | 2019-12-27 | 2021-07-29 | ユニ・チャーム株式会社 | 吸収性物品 |
JP2021106706A (ja) * | 2019-12-27 | 2021-07-29 | ユニ・チャーム株式会社 | 吸収性物品 |
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2016
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- 2016-08-12 WO PCT/JP2016/073784 patent/WO2017094290A1/ja active Application Filing
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WO2021132618A1 (ja) * | 2019-12-27 | 2021-07-01 | ユニ・チャーム株式会社 | 吸収性物品 |
JP2021106709A (ja) * | 2019-12-27 | 2021-07-29 | ユニ・チャーム株式会社 | 吸収性物品 |
JP2021106706A (ja) * | 2019-12-27 | 2021-07-29 | ユニ・チャーム株式会社 | 吸収性物品 |
JP7281398B2 (ja) | 2019-12-27 | 2023-05-25 | ユニ・チャーム株式会社 | 吸収性物品 |
JP7286533B2 (ja) | 2019-12-27 | 2023-06-05 | ユニ・チャーム株式会社 | 吸収性物品 |
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