WO2016157915A1 - 皮膚貼着用不織布およびその製造方法 - Google Patents
皮膚貼着用不織布およびその製造方法 Download PDFInfo
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- WO2016157915A1 WO2016157915A1 PCT/JP2016/001886 JP2016001886W WO2016157915A1 WO 2016157915 A1 WO2016157915 A1 WO 2016157915A1 JP 2016001886 W JP2016001886 W JP 2016001886W WO 2016157915 A1 WO2016157915 A1 WO 2016157915A1
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- Prior art keywords
- skin
- nonwoven fabric
- woven fabric
- skin application
- aqueous binder
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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
- A61F13/02—Adhesive bandages or dressings
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
- D04H1/645—Impregnation followed by a solidification process
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
Definitions
- the present invention relates to a non-woven fabric for skin application, and more particularly to a non-woven fabric for skin application used by absorbing liquids such as chemicals and lotions and attaching to skin such as the face, body, hands and feet, and a method for producing the same.
- Non-woven fabrics for skin use that absorb and absorb liquids such as chemicals and lotions are used for medical purposes and cosmetic purposes.
- Non-woven fabric for skin application for medical purposes includes, for example, a wound dressing and a drug sustained release patch.
- a face mask etc. in the nonwoven fabric for skin affixing for beauty purposes, for example.
- These non-woven fabrics for skin application absorb and retain an appropriate amount of liquid (retention property), follow the undulation of the applied site, adhere to the skin, and maintain it (stickiness), etc.
- Various qualities are required.
- hydrophilic fibers such as cellulosic fibers having higher hydrophilicity than synthetic fibers are preferably used as the main component of the non-woven fabric for skin application in order to obtain good liquid retention.
- Patent Document 1 discloses a fine cellulose fiber comprising specific fine cellulose fibers on one surface or both surfaces of a nonwoven fabric layer containing cellulosic fibers as a constitution for obtaining good stickiness in addition to liquid retention.
- a nonwoven fabric structure in which nonwoven fabric layers are laminated and integrated is disclosed.
- Patent Document 1 it is necessary to produce fine cellulose fibers made of specific fine cellulose, which increases the cost. Therefore, the configuration of Patent Document 1 is intended for high-end products and is not suitable for general-purpose products.
- the present invention aims to provide a non-woven fabric for skin application and a method for producing the same, which are different from Patent Document 1 but have good liquid retention and sticking properties.
- the non-woven fabric for skin application of the present invention and a method for producing the same for solving the above-described problems have the following aspects.
- the non-woven fabric for skin application is a dry non-woven fabric obtained by joining a plurality of fiber sheets formed by an airlaid method with an aqueous binder and then compressing them, [1] or [2 ] The nonwoven fabric for skin affixing of description.
- the non-woven fabric for skin application contains cellulosic fibers in an amount of 50% by mass or more based on the total mass of the non-woven fabric for skin application, from [1] to [4] The nonwoven fabric for skin affixation as described in any one.
- the skin-bonding nonwoven fabric contains the aqueous binder in an amount of 5% by mass to 30% by mass, according to any one of [1] to [5] Non-woven fabric for skin application.
- the step of forming a plurality of fiber sheets by the airlaid method and the formed plurality of fiber sheets are joined to each other with an aqueous binder having a glass transition point of 10 ° C. or less, and the basis weight is 20 g / m 2 or more and 80 g.
- the non-woven fabric for skin application of the present invention is a non-woven fabric for skin application provided for use by containing a liquid, and includes an aqueous binder having a glass transition point of 10 ° C. or less, and a basis weight of 20 g / m 2 or more and 80 g / m. m 2 or less, and the thickness before including the liquid is 1 mm or less.
- the nonwoven fabric for skin application of the present invention contains hydrophilic fibers as a main component.
- the hydrophilic fiber is preferably a cellulosic fiber.
- the non-woven fabric for skin application of the present invention can be preferably obtained by joining a plurality of fiber sheets formed by the airlaid method to each other with an aqueous binder and compressing them.
- the skin-bonding nonwoven fabric of the present invention has a laminated structure comprising a plurality of laminated fiber sheets and an aqueous binder distributed throughout the laminated plurality of fiber sheets.
- the aqueous binder is distributed substantially uniformly in the thickness direction of the laminated structure, and serves to bond adjacent fiber sheets to each other and to fix the internal fibers.
- the nonwoven fabric for skin application of the present invention can be obtained by bonding fiber sheets to each other with an aqueous binder and compressing them. Therefore, the non-woven fabric for skin application of the present invention is in the same state without being subjected to a compression step, in which the fibers are in a state where the distance between the fibers is reduced by compression in the stage before being used. The thickness is thinner than the non-woven fabric for skin application.
- the non-woven fabric for skin application according to the present invention is used for use by containing a liquid, water enters the internal voids, and the fibers themselves swell and the thickness is restored. be able to.
- the nonwoven fabric for skin application of the present invention can be obtained by compressing a dry nonwoven fabric produced by a dry method.
- dry methods a process of forming a fiber web by dry disaggregation of raw fibers (formation process), and a process of spraying an aqueous emulsion (aqueous binder) serving as a binder to the fiber web (binder spray)
- a so-called air laid method (sometimes referred to as an air laid method) is used.
- the airlaid method includes the Honshu paper manufacturing method, the Karl Croyer method, the Dunweb method, the J & J method, the KC method, the Scott method, etc.
- the Honshu paper manufacturing method is most preferably used.
- the produced dry nonwoven fabric is compressed under the condition that the thickness before the liquid is contained is 1 mm or less.
- any known means such as passing through a slit or a calendar nip can be used.
- the non-woven fabric for skin application according to the present invention is in a state where the thickness is thin at the stage before use in order to improve the property of sticking to the skin following the undulation of the applied site and its durability (sticking property) It is formed by being compressed. In use, the thickness of the non-woven fabric for skin application is gradually restored to the original thickness by including a liquid.
- the dry nonwoven fabric of the present invention has a thickness of not more than 1 mm, preferably not more than 0.8 mm, more preferably not more than 0.4 mm, in order to obtain a good sticking property. More preferably, it is 0.3 mm or less.
- the lower limit of the thickness before including the liquid is not particularly limited as long as the effect of the present invention is exerted, but there is a limit of the thickness (thinness) according to the basis weight or density, and the skin adhesive From the viewpoint of usability when used as a worn nonwoven fabric, it is usually 0.05 mm or more.
- the non-woven fabric for skin application of the present invention contains hydrophilic fibers as raw fibers.
- the hydrophilic fiber is preferably a cellulosic fiber.
- wood pulp conifers, hardwoods
- rug pulp rug pulp
- linter pulp linen pulp
- non-wood pulp such as straw, three bases, and husk pulp, waste paper pulp, and the like.
- wood pulp fibers are useful and preferred industrially.
- ground pulp GP
- refiner ground pulp RGP
- thermomechanical pulp TMP
- regenerated fibers such as rayon (cellulose fiber produced by the viscose method) and Tencel (registered trademark) (purified cellulose fiber by solvent spinning) can also be used.
- rayon cellulose fiber produced by the viscose method
- Tencel registered trademark
- One kind of the above-mentioned cellulosic fibers may be used, or two or more kinds may be used.
- softwood kraft pulp As a raw material of the cellulosic fiber used in the present invention, softwood kraft pulp (NKP) is particularly suitable from the viewpoint of supply amount, quality stability, cost and the like.
- the non-woven fabric for skin application of the present invention is mainly composed of hydrophilic fibers, and is preferably 50% by mass or more, more preferably 60% by mass or more, and still more preferably based on the total mass of the non-woven fabric for skin application.
- the hydrophilic fiber is contained in an amount of 70% by mass or more, particularly preferably 75% by mass or more.
- strength obtained by it Preferably it is 95 mass% or less.
- the non-woven fabric for skin application of the present invention may contain hydrophobic fibers of any material depending on the situation.
- hydrophobic fiber it is preferable that the compounding quantity is 0.01 mass% or more and 30 mass% or less on the basis of the total mass of the raw material fiber of the nonwoven fabric for skin sticking.
- hydrophobic fibers examples include polyolefin fibers such as polyethylene (PE) and polypropylene (PP), polyester (PET) fibers, and nylon fibers.
- the composite fiber formed by combining synthetic resins having different melting points can be used.
- PE / PP, PE / PET, PP / PET, low-melting point PET / PET, low-melting point PP / PP, nylon 6 / nylon 66, etc. as combinations of the composite fiber resins. It is.
- the composite fiber includes a side-by-side type composite fiber obtained by spinning different resins in parallel, a core-sheath type composite fiber obtained by spinning the low melting point resin as the outside and the high melting point resin as the inside, and any of them can be used.
- the average fiber length of the raw fibers of the non-woven fabric for skin application is preferably 1 to 10 mm, more preferably 1 to 6 mm. It is also possible to use a mixture of fibers having different fiber lengths. When the average fiber length of the raw fibers is within this range, it is easy to form a web by the airlaid method, and it is easy to obtain a uniform dispersion state of the fibers.
- the average fiber diameter of the raw fiber of the non-woven fabric for skin application is preferably 3 ⁇ m or more, more preferably 3 to 100 ⁇ m, still more preferably 5 to 80 ⁇ m, and particularly preferably 10 to 60 ⁇ m.
- the average fiber length and average fiber diameter were each measured at five points with an optical microscope and calculated as the average value.
- the nonwoven fabric for skin application of the present invention contains an aqueous binder having a glass transition point (Tg) of 10 ° C. or lower.
- Tg glass transition point
- the aqueous binder is used for fixing the fibers together.
- aqueous binders examples include aqueous solutions such as casein, sodium alginate, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinyl alcohol (PVA), and sodium polyacrylate, each having a glass transition (Tg) of 10 ° C. or less.
- aqueous solutions such as casein, sodium alginate, hydroxyethylcellulose, sodium carboxymethylcellulose, polyvinyl alcohol (PVA), and sodium polyacrylate, each having a glass transition (Tg) of 10 ° C. or less.
- emulsions such as polyacrylic acid ester, acrylic / styrene copolymer, polyvinyl acetate, ethylene / vinyl acetate copolymer (EVA), acrylonitrile / butadiene copolymer, methyl methacrylate / butadiene copolymer,
- An emulsion type binder such as styrene / butadiene copolymer latex (SBR) can be used.
- SBR styrene / butadiene copolymer latex
- an emulsion type binder of ethylene / vinyl acetate copolymer (EVA) or styrene / butadiene copolymer latex (SBR) can be suitably used.
- the non-woven fabric for skin application of the present invention has a basis weight set in a predetermined range in order to secure a property (liquid retention) that absorbs and retains an appropriate amount of liquid.
- the non-woven fabric for skin application according to the present invention is in a stage before being used in order to improve the property of sticking to the skin following the undulations of the applied site and its durability (stickiness). It is formed by being compressed so that the thickness is thin. And by including a liquid in use, the thickness of the non-woven fabric for skin application is gradually restored to the original thickness.
- the non-woven fabric for skin application tends to feel somewhat hard or feel like a film in the stage immediately after application.
- Tg glass transition point
- the glass transition point (Tg) of the aqueous binder of the present invention is 10 ° C. or less, preferably 5 ° C. or less.
- the lower limit of the glass transition point (Tg) is not particularly limited as long as the effects of the present invention are exhibited.
- the glass transition point (Tg) is, for example, preferably ⁇ 100 ° C. or higher, more preferably ⁇ 50. ° C or higher, more preferably -30 ° C or higher.
- the applied amount of the aqueous binder in the skin-adhering nonwoven fabric of the present invention is 5 to 30% by mass based on the total mass of the skin-adhering nonwoven fabric from the viewpoint of the balance between the strength and liquid retention of the skin adhesive nonwoven fabric. 10 to 25% by mass is more preferable.
- a hydrophilizing agent for promoting water absorption and a pigment for coloring can be dispersed.
- hydrophilizing agents examples include nonionic surfactants such as polyoxyethylene alkyl ethers, sorbitan fatty acid esters, sucrose fatty acid esters, and polyglycerin fatty acid esters, amphoteric surfactants such as alkylamide betaines, and polyoxyethylene alkyl ether sulfates. And anionic surfactants such as sulfosuccinate and dioctylsulfosuccinate Na salt. In the present invention, not only one type but also two types or three or more types can be mixed and used.
- the addition amount of the hydrophilizing agent is not particularly limited. However, as the addition amount increases, the amount eluted from the non-woven fabric for skin application increases, so care must be taken. Preferably, the content is 0.01 to 3% based on the total mass of the non-woven fabric for skin application.
- the basis weight of the non-woven fabric for skin application of the present invention is in the range of 20 to 80 g / m 2 , preferably in the range of 30 to 50 g / m 2 .
- the basis weight is less than 20 g / m 2
- the amount of hydrophilic fibers contained per unit area is small, so that the water absorption amount of liquids such as chemicals and lotions becomes insufficient.
- rigidity is low and there exists a tendency for usability to worsen when using as a skin-bonding nonwoven fabric.
- the basis weight exceeds 80 g / m 2 , the water absorption per unit area is large and the liquid retention is good, but the sticking property is deteriorated.
- the nonwoven fabric for skin application of the present invention may include a surface fiber layer on one side or both sides for the purpose of modifying the surface such as changing the softness (texture) or texture.
- the surface fibrous layer in view of the surface modification effect by stiffness and laminated as a skin sticking nonwoven, preferably in the range of per side 0.5 ⁇ 20g / m 2, more preferably 0.5 ⁇ 10g / m 2 More preferably, it is 1.0 to 3.0 g / m 2 .
- Cellulose fibers such as rayon and cotton are desirable from the viewpoint of water absorption and softness as the fibers used for the surface fiber layer, but other fibers such as other natural fibers and synthetic fibers (for example, polyester) can be used. It is also possible to use a mixture.
- Example 1 A dry nonwoven fabric was manufactured as follows using an airlaid nonwoven fabric machine manufactured by Honshu Paper.
- Rayon fiber manufactured by Daiwabo Rayon Co., Ltd., 1.7 dtex (fiber diameter: 12 ⁇ m ⁇ fiber length: 29 mm) [fiber for surface fiber layer 1], commercially available softwood bleached kraft pulp (NBKP) on a traveling mesh conveyor Pulp fibers [fibers for intermediate fiber layer 1] obtained by defibrating pulp with a dry defibrating device and the same rayon fibers [fibers for surface fiber layer 2] used in the surface fiber layer 1 in this order
- the surface fiber layer 1 target basis weight 2.0 g / m 2
- the intermediate fiber layer 1 target basis weight 28.6 g / m 2
- the surface fiber layer 2 target basis weight 2.0 g / m 2
- aqueous binder liquid that is a mixed liquid of an aqueous binder and a hydrophilizing agent was sprayed onto the fiber web.
- the fiber web was passed through a hot air dryer (atmospheric temperature 170 ° C.) to bond the fibers.
- the fibrous web was inverted, and an aqueous binder liquid was sprayed from the side opposite to the surface where the binder liquid was first sprayed. At this time, an equal amount of an aqueous binder solution was sprayed on each of both surfaces so that the total binder solid content on both surfaces was 9.8 g / m 2 .
- the web was again passed through a hot air dryer (atmospheric temperature 170 ° C.) to obtain a dry nonwoven fabric having a basis weight of 42.5 g / m 2 (target basis weight 43.0 g / m 2 ).
- the obtained dry nonwoven fabric is compressed so that the thickness of the finally obtained nonwoven fabric for skin application is 0.23 mm, thereby having a thickness of 1 mm or less (0.23 mm).
- a non-woven fabric for skin application was obtained.
- the ethylene vinyl acetate copolymer (EVA) (glass transition point (Tg) ⁇ 17 ° C.) sold as product A is used as the aqueous binder, and the dioctylsulfosuccin is used as the hydrophilizing agent.
- Nate Na salt was used in an amount of 0.12% by mass with respect to the obtained non-woven fabric for skin application.
- the target basis weight of each fiber layer is defined as surface fiber layer 1 (2.0 g / m 2 ), intermediate fiber layer 1 (29.7 g / m 2 ), and surface fiber layer 2 (2.0 g / m 2 ),
- the aqueous binder the ethylene vinyl acetate copolymer (EVA) (Glass transition point (Tg) ⁇ 19 ° C.) of the sale item B is used, and the total binder solid content on both sides of the aqueous binder is 10.1 g / m 2.
- EVA Glass transition point
- a dry nonwoven fabric having a basis weight of 43.9 / m 2 was obtained in the same manner as in Example 1 except for the above. Next, the obtained dry nonwoven fabric is compressed so that the thickness of the finally obtained nonwoven fabric for skin application is 0.74 mm, thereby having a thickness of 1 mm or less (0.74 mm).
- a non-woven fabric for skin application was obtained.
- the target basis weight of each fiber layer is defined as surface fiber layer 1 (2.0 g / m 2 ), intermediate fiber layer 1 (27.9 g / m 2 ), and surface fiber layer 2 (2.0 g / m 2 ),
- an aqueous binder the ethylene vinyl acetate copolymer (EVA) (Glass transition point (Tg) 4 ° C.) of Sales C is used, and sucrose fatty acid ester is used as a hydrophilic agent, and the obtained non-woven fabric for skin application
- EVA Glass transition point
- sucrose fatty acid ester is used as a hydrophilic agent
- a dry nonwoven fabric of 1 g / m 2 was obtained. Next, the obtained dry nonwoven fabric is compressed so that the thickness of the finally obtained nonwoven fabric for skin application is 0.34 mm, thereby having a thickness of 1 mm or less (0.34 mm). A non-woven fabric for skin application was obtained.
- each fiber layer is defined as surface fiber layer 1 (2.0 g / m 2 ), intermediate fiber layer 1 (27.6 g / m 2 ), and surface fiber layer 2 (2.0 g / m 2 ), Styrene / butadiene copolymer (SBR) (Glass transition point (Tg) -19 ° C) of Sales D is used as an aqueous binder, and sucrose fatty acid ester is used as a hydrophilizing agent.
- SBR Glass transition point (Tg) -19 ° C) of Sales D
- sucrose fatty acid ester is used as a hydrophilizing agent.
- a basis weight of 42 was obtained in the same manner as in Example 3 except that the amount used was 0.56% by mass with respect to the nonwoven fabric, and the total solid content of the aqueous binder was 10.5 g / m 2.
- a dry nonwoven fabric of 0.7 / m 2 was obtained.
- the obtained dry nonwoven fabric is compressed so that the thickness of the finally obtained nonwoven fabric for skin application is 0.35 mm, thereby having a thickness of 1 mm or less (0.35 mm).
- a non-woven fabric for skin application was obtained.
- each fiber layer is defined as surface fiber layer 1 (2.0 g / m 2 ), intermediate fiber layer 1 (27.2 g / m 2 ), and surface fiber layer 2 (2.0 g / m 2 ),
- aqueous binder ethylene vinyl acetate copolymer (EVA) (Glass transition point (Tg) 14 ° C.) of sale product E is used, and sucrose fatty acid ester is obtained as a hydrophilic agent.
- EVA Glass transition point
- sucrose fatty acid ester is obtained as a hydrophilic agent.
- the basis weight was 42.7.
- a dry nonwoven fabric of / m 2 was obtained.
- the obtained dry nonwoven fabric is compressed so that the thickness of the finally obtained nonwoven fabric for skin application is 0.78 mm, thereby having a thickness of 1 mm or less (0.78 mm).
- a non-woven fabric for skin application was obtained.
- the target basis weight of each fiber layer is defined as surface fiber layer 1 (2.0 g / m 2 ), intermediate fiber layer 1 (27.6 g / m 2 ), and surface fiber layer 2 (2.0 g / m 2 ),
- ethylene vinyl acetate copolymer (EVA) Glass transition point (Tg) 20 ° C.
- EVA Glass transition point (Tg) 20 ° C.
- sucrose fatty acid ester is obtained as the hydrophilic agent
- the basis weight was 39.5 in the same manner as in Example 3 except that the total solid content of both surfaces of the aqueous binder was 7.5 g / m 2.
- a dry nonwoven fabric of / m 2 was obtained. Next, the obtained dry nonwoven fabric is compressed so that the thickness of the finally obtained nonwoven fabric for skin application is 0.33 mm, thereby having a thickness of 1 mm or less (0.33 mm). A non-woven fabric for skin application was obtained.
- a dry nonwoven fabric having a basis weight of 44.2 g / m 2 was obtained by the same method as described in Example 1.
- the obtained dry nonwoven fabric is compressed so that the finally obtained nonwoven fabric for skin application has a thickness of 1.02 mm, thereby having a thickness exceeding 1 mm (1.02 mm).
- a non-woven fabric for skin application was obtained.
- Basis weight Basis weight was measured according to Japanese Industrial Standards JIS P8124 “Paper and paperboard—Method of measuring basis weight”.
- Thickness The thickness was measured in accordance with Japanese Industrial Standard JIS P8118 “Paper and paperboard—Test method for thickness and density”.
- the non-woven fabric for skin application is used with a chemical solution or lotion, it has wet tensile strength as one of the required qualities related to the application.
- the wet tensile strength is preferably as large as possible so long as the sticking property is not adversely affected.
- the wet tensile strength specification was set to 12.0 N / 100 mm or more, and a sample satisfying this specification was subjected to an evaluation test. The wet tensile strength was ensured by adjusting the amount of aqueous binder sprayed.
- Stiffness (Rigidity) Stiffness was measured in accordance with the handle ohmmeter method of Japanese Industrial Standard JIS L1096 “Textile and Textile Fabric Testing Method”. It shows that rigidity is so high that rigidity is large.
- the non-woven fabric to be applied to the skin is used after being applied with a chemical solution or a lotion, and is used by being applied to the skin, and therefore has an appropriate rigidity as one of the required qualities related to the application.
- the stiffness was evaluated to be better as it was smaller (lower) from the viewpoint of the ability to follow the undulation of the pasted site.
- a sample having a size of 100 ⁇ 100 mm was folded in eight, and 10 g of a commercially available cosmetic liquid was added to infiltrate uniformly.
- the sample that had been folded after penetration was affixed to the skin at the base of the arm, and the degree of adhesion was judged from the skin sensation and appearance (fitness). It evaluated that sticking property was so favorable that the adhesion degree was large.
- the average score of 5 users was calculated with 5 being the best and 1 being the worst, and the rating was expressed as an integer from 5 to 1.
- Example 1 As a sample in which the glass transition temperature (Tg) and basis weight of the aqueous binder are the same and the thickness before including the liquid is different, Example 1 (0.23 mm), Example 2 (0.74 mm), and comparison Example 3 (1.02 mm) was compared. Comparative Example 3 having a thickness exceeding 1 mm had high rigidity and poor sticking property. In Example 1 and Example 2, as the thickness before including the liquid was smaller, the stiffness was smaller and the sticking property was better. *
- Example 3 Tg 4 ° C.
- Comparative Example 2 Tg 20 ° C.
- Example 2 (Tg-19 ° C.) and Comparative Example 1 (Tg 14 ° C.) Compared.
- Example 2 was less rigid than Comparative Example 1 and had good stickiness by sensory evaluation (Comparative Example 1 was evaluated 3 whereas Example 2 was better than that) Evaluation 4).
- the non-woven fabric for skin application of the present invention has both good liquid retention and sticking properties, and is suitably used for medical purposes, cosmetic purposes, etc. for absorbing and adhering liquids such as chemicals and lotions. be able to.
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Abstract
Description
本発明の皮膚貼着用不織布は、液体を含ませて使用に供される皮膚貼着用不織布であって、ガラス転移点が10℃以下の水性バインダーを含み、坪量が20g/m2以上80g/m2以下であり、液体を含ませる前の厚さが1mm以下であることを特徴とする。
本発明の皮膚貼着用不織布は、主成分として親水性繊維を含む。親水性繊維は、好ましくは、セルロース系繊維である。本発明の皮膚貼着用不織布は、好ましくは、エアレイド法において形成される複数の繊維シートを水性バインダーにより相互に接合し、これを圧縮することにより得ることができる。
本発明の皮膚貼着用不織布は、乾式法により製造される乾式不織布を圧縮することにより得ることができる。乾式法の中でも、原料繊維を乾式離解して繊維ウェブを形成する工程(フォーメーション工程)と、前記繊維ウェブに対してバインダーとなる水性エマルジョン(水性バインダー)を繊維ウェブにスプレー散布する工程(バインダースプレー工程)と、前記繊維ウェブの繊維相互間を前記水性バインダーによって結合する乾燥加熱工程(乾燥工程)とからなる、いわゆるエアレイド法(エアレイ法と呼ばれることもある)が用いられる。エアレイド法には、本州製紙法、カールクロイヤー法、ダンウェブ法、J&J法、KC法、スコット法等が存在するが、この中でも本州製紙法が最も好適に用いられる。製造された乾式不織布は、液体を含ませる前の厚さが1mm以下となるような条件で圧縮される。圧縮には、例えば、スリットやカレンダーニップに通すなど、知られている任意の手段を用いることができる。
本発明の皮膚貼着用不織布は、貼着部位の起伏に追従して皮膚に密着する性質およびその持続性(貼り付き性)を向上させるために、使用される前の段階において厚さが薄い状態であるように圧縮されて形成されている。使用の際には、液体を含ませることによって、皮膚貼着用不織布の厚さは、元の厚さに徐々に復元されていく。
本発明の皮膚貼着用不織布は、原料繊維として親水性繊維を含む。親水性繊維は、好ましくは、セルロース系繊維である。
本発明の皮膚貼着用不織布は、ガラス転移点(Tg)が10℃以下である水性バインダーを含む。本発明において、水性バインダーは、繊維同士を固着させるために用いられる。
本発明の皮膚貼着用不織布は、その片面もしくは両面に、柔らかさ(肌触り)や風合いを変更するなど表面を改質する目的で、表面繊維層を含んでいてもよい。
本州製紙法のエアレイ法不織布マシンにより以下の通り乾式不織布を製造した。
各繊維層の目標坪量を、表面繊維層1(2.0g/m2)、中間繊維層1(29.7g/m2)、および表面繊維層2(2.0g/m2)とし、 水性バインダーとして、販売品Bのエチレン酢酸ビニル共重合体(EVA)(ガラス転移点(Tg)-19℃)を使用し、水性バインダーの両面合計のバインダー固形分が10.1g/m2となるようにした以外は実施例1と同様にして、坪量43.9/m2の乾式不織布を得た。次いで、得られた乾式不織布に対して、最終的に得られる皮膚貼着用不織布の厚さが0.74mmとなるように圧縮処理を行うことにより、1mm以下(0.74mm)の厚さを有する皮膚貼着用不織布を得た。
各繊維層の目標坪量を、表面繊維層1(2.0g/m2)、中間繊維層1(27.9g/m2)、および表面繊維層2(2.0g/m2)とし、水性バインダーとして、販売品Cのエチレン酢酸ビニル共重合体(EVA)(ガラス転移点(Tg)4℃)を使用し、親水化剤としては、ショ糖脂肪酸エステルを、得られた皮膚貼着用不織布に対して0.44質量%となる量で使用し、水性バインダーの両面合計の固形分が7.7g/m2となるようにした以外は、実施例1と同様にして、坪量40.1g/m2の乾式不織布を得た。次いで、得られた乾式不織布に対して、最終的に得られる皮膚貼着用不織布の厚さが0.34mmとなるように圧縮処理を行うことにより、1mm以下(0.34mm)の厚さを有する皮膚貼着用不織布を得た。
各繊維層の目標坪量を、表面繊維層1(2.0g/m2)、中間繊維層1(27.6g/m2)、および表面繊維層2(2.0g/m2)とし、水性バインダーとして、販売品Dのスチレン・ブタジエン共重合体(SBR)(ガラス転移点(Tg)-19℃)を使用し、親水化剤としては、ショ糖脂肪酸エステルを、得られた皮膚貼着用不織布に対して0.56質量%となる量で使用し、水性バインダーの両面合計の固形分が10.5g/m2となるようにした以外は、実施例3と同様にして、坪量42.7/m2の乾式不織布を得た。次いで、得られた乾式不織布に対して、最終的に得られる皮膚貼着用不織布の厚さが0.35mmとなるように圧縮処理を行うことにより、1mm以下(0.35mm)の厚さを有する皮膚貼着用不織布を得た。
各繊維層の目標坪量を、表面繊維層1(2.0g/m2)、中間繊維層1(27.2g/m2)、および表面繊維層2(2.0g/m2)とし、水性バインダーとして、販売品Eのエチレン酢酸ビニル共重合体(EVA)(ガラス転移点(Tg)14℃)を使用し、親水化剤としては、ショ糖脂肪酸エステルを、得られた皮膚貼着用不織布に対して0.40質量%となる量で使用し、水性バインダーの両面合計の固形分が11.1g/m2となるようにした以外は実施例3と同様にして、坪量42.7/m2の乾式不織布を得た。次いで、得られた乾式不織布に対して、最終的に得られる皮膚貼着用不織布の厚さが0.78mmとなるように圧縮処理を行うことにより、1mm以下(0.78mm)の厚さを有する皮膚貼着用不織布を得た。
各繊維層の目標坪量を、表面繊維層1(2.0g/m2)、中間繊維層1(27.6g/m2)、および表面繊維層2(2.0g/m2)とし、水性バインダーとして、販売品Fのエチレン酢酸ビニル共重合体(EVA)(ガラス転移点(Tg)20℃)を使用し、親水化剤としては、ショ糖脂肪酸エステルを、得られた皮膚貼着用不織布に対して0.43質量%となる量で使用し、水性バインダーの両面合計の固形分が7.5g/m2となるようにした以外は実施例3と同様にして、坪量39.5/m2の乾式不織布を得た。次いで、得られた乾式不織布に対して、最終的に得られる皮膚貼着用不織布の厚さが0.33mmとなるように圧縮処理を行うことにより、1mm以下(0.33mm)の厚さを有する皮膚貼着用不織布を得た。
まず、実施例1に記載された方法と同様の方法により、坪量44.2g/m2の乾式不織布を得た。次いで、得られた乾式不織布に対して、最終的に得られる皮膚貼着用不織布の厚さが1.02mmとなるように圧縮処理を行うことにより、1mm超え(1.02mm)の厚さを有する皮膚貼着用不織布を得た。
I.坪量
日本工業規格JIS P8124「紙及び板紙-坪量の測定方法」に準拠して坪量を測定した。
日本工業規格JIS P8118「紙及び板紙-厚さ及び密度の試験方法」に準拠して厚さを測定した。
日本工業規格JIS P8135「紙及び板紙-湿潤引張強さ試験方法」に準拠して縦方向(MD)の湿潤引張強度を測定した。
日本工業規格JIS L1096「織物及び織物の生地試験方法」のハンドルオメーター法に準拠して剛度を測定した。剛度が大きいほど、剛性が高いことを示す。
厚生労働省「医療ガーゼ・医療脱脂綿基準」(平成17年6月30日付け薬食機発第0630001号の別紙参照)の項目6(1)カに示される沈降速度の測定法に準拠して、試料を入れたかごを水の中に落として水面下に沈むまでの時間を測定し、これを吸水時間とした。吸水時間5秒以下を、皮膚貼着用不織布の用途に関連した要求品質とした。吸水時間が短いほど、吸水性が高く、保液性が良好であると評価した。
皮膚貼着用不織布の貼り付き性として、皮膚貼着用不織布を貼り付けた際の肌の感覚および外観(フィット感)を、5人のユーザーによる官能試験にて5段階評価した。
実施例および比較例において、吸水時間はいずれも5秒以下で略横並びであり、設定した要求品質を満たしていた。一方、貼り付き性については、比較例が評価3または評価2であったのに対し、全ての実施例で、それよりも良好な評価4または評価5が得られた。
Claims (7)
- 液体を含ませて使用に供される皮膚貼着用不織布であって、ガラス転移点が10℃以下の水性バインダーを含み、坪量が20g/m2以上80g/m2以下であり、液体を含ませる前の厚さが1mm以下であることを特徴とする皮膚貼着用不織布。
- 前記水性バインダーは、エチレン酢酸ビニル共重合体であることを特徴とする請求項1に記載の皮膚貼着用不織布。
- 前記皮膚貼着用不織布は、エアレイド法によって形成された複数の繊維シートを水性バインダーで接合し、次いで圧縮して得られた乾式不織布であることを特徴とする請求項1または2に記載の皮膚貼着用不織布。
- 前記皮膚貼着用不織布は、セルロース系繊維を主成分とすることを特徴とする請求項1から3のいずれか一項に記載の皮膚貼着用不織布。
- 前記皮膚貼着用不織布は、セルロース系繊維を、皮膚貼着用不織布の全質量を基準として50質量%以上の量で含有していることを特徴とする請求項1から4のいずれか一項に記載の皮膚貼着用不織布。
- 前記皮膚貼着用不織布は、前記水性バインダーを、5質量%以上30質量%以下の量で含有していることを特徴とする請求項1から5のいずれか一項に記載の皮膚貼着用不織布。
- エアレイド法によって複数の繊維シートを形成する工程と、形成された複数の繊維シートをガラス転移点が10℃以下の水性バインダーで相互に接合して、坪量が20g/m2以上80g/m2以下の乾式不織布を得る工程と、得られた乾式不織布を紙厚が1mm以下となるように圧縮する工程と、を含むことを特徴とする、皮膚貼着用不織布の製造方法。
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- 2016-04-01 JP JP2017509304A patent/JP6579192B2/ja active Active
- 2016-04-01 KR KR1020177023671A patent/KR101999628B1/ko active Active
- 2016-04-01 WO PCT/JP2016/001886 patent/WO2016157915A1/ja not_active Ceased
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| JP2023051889A (ja) * | 2021-09-30 | 2023-04-11 | 大和紡績株式会社 | 積層不織布およびその製造方法、液体含浸皮膚被覆シート、ならびにフェイスマスク |
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| KR20170104620A (ko) | 2017-09-15 |
| CN107407026A (zh) | 2017-11-28 |
| TWI637089B (zh) | 2018-10-01 |
| CN107407026B (zh) | 2019-10-25 |
| JPWO2016157915A1 (ja) | 2017-11-24 |
| JP6579192B2 (ja) | 2019-09-25 |
| TW201641769A (zh) | 2016-12-01 |
| KR101999628B1 (ko) | 2019-07-12 |
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