WO2022163716A1 - 繊維用親水剤及び不織布 - Google Patents
繊維用親水剤及び不織布 Download PDFInfo
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- WO2022163716A1 WO2022163716A1 PCT/JP2022/002924 JP2022002924W WO2022163716A1 WO 2022163716 A1 WO2022163716 A1 WO 2022163716A1 JP 2022002924 W JP2022002924 W JP 2022002924W WO 2022163716 A1 WO2022163716 A1 WO 2022163716A1
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- WIPO (PCT)
- Prior art keywords
- acid
- nonwoven fabric
- fibers
- hydrophilic agent
- carbon atoms
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Classifications
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- A61F13/00—Bandages or dressings; Absorbent pads
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- A—HUMAN NECESSITIES
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- 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
- A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
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- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
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- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/165—Ethers
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
- D06M13/224—Esters of carboxylic acids; Esters of carbonic acid
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/244—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus
- D06M13/248—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing sulfur or phosphorus with compounds containing sulfur
- D06M13/256—Sulfonated compounds esters thereof, e.g. sultones
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/53—Polyethers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B43/00—Testing correct operation of photographic apparatus or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/416—Reflective
Definitions
- the present invention relates to a hydrophilic agent for fibers and a nonwoven fabric containing the hydrophilic agent for fibers.
- Hydrophilicity is essential for the non-woven fabrics used in the topsheets of disposable diapers and sanitary napkins. Hydrophobic nonwoven fabrics such as polyolefin and polyester are used as the nonwoven fabric used for the top sheet, and hydrophilicity is imparted by adding a hydrophilic agent such as a surfactant. It is important to make the hydrophilicity of the nonwoven fabric uniform in the width direction and the machine direction.
- Patent Documents 1 and 2 below propose to uniformly impart hydrophilicity by using a specific manufacturing method. It is however, there is no disclosure of a technique for reducing the time-dependent change in agent adhesion rate in continuous coating, regardless of the type of hydrophilic agent used.
- the problem to be solved by the present invention is to provide a hydrophilic agent for fibers that achieves both flexibility and hydrophilicity (liquid flowability and repeated hydrophilicity) and has a low change in adhesion rate, and the An object of the present invention is to provide a nonwoven fabric containing a hydrophilic agent for fibers.
- the present inventors have found that by using an ester compound in which an alcohol having 5 or more carbon atoms and a fatty acid are condensed together with an anionic surfactant, fibers can be obtained.
- the present inventors have unexpectedly found that the deposition rate of the hydrophilic agent during processing of the base material is stable, and that a textile product having sufficient hydrophilic performance and flexibility can be obtained, leading to the completion of the present invention.
- a hydrophilic agent for fibers comprising an ester compound obtained by condensing an alcohol having 5 or more carbon atoms and a fatty acid, and an anionic surfactant.
- the hydrophilic agent for fibers according to [1] above, wherein the alcohol having 5 or more carbon atoms is a polyhydric alcohol.
- the hydrophilic agent for fibers according to any one of [1] to [4], wherein the fatty acid has 6 or more carbon atoms.
- the ester compound is an alcohol selected from the group consisting of sorbitan, sorbitol and sucrose; Octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, cis-9-octadecenoic acid, eicosanoic acid, docosanoic acid, tetracosanoic acid, hexacosanoic acid, octacosanoic acid, 2-ethylhexyl acid , isostearic acid, coconut oil fatty acid, and fatty acid condensed with a fatty acid selected from the group consisting of beef tallow fatty acid, and
- the hydrophilic agent is
- the sulfonate-type surfactant contains a dialkylsulfosuccinate, and the dialkylsulfosuccinate is 1% by mass to 30% by mass when the hydrophilic agent for fibers is taken as 100% by mass.
- the present invention is a hydrophilic agent for fibers that achieves both flexibility and hydrophilicity (liquid flowability and repeated hydrophilicity) and has a low adhesion rate change, and a nonwoven fabric containing the hydrophilic agent for fibers. Since the hydrophilic nonwoven fabric obtained by treatment with the fiber hydrophilic agent of the present invention has excellent hydrophilicity, it can be suitably used as a top sheet or second sheet for sanitary materials such as sanitary napkins, incontinence pads, and disposable diapers. Furthermore, it can also be used for, for example, masks, body warmers, tape bases, patch bases, emergency bandages, packaging materials, wipes, medical gowns, bandages, clothing, skin care sheets, and the like.
- hydrophilic agent for fibers of the present embodiment is characterized by containing an ester compound in which an alcohol having 5 or more carbon atoms is condensed with a fatty acid.
- alcohols having 5 or more carbon atoms include sorbitan, sorbitol, polyglycerin, castor oil, pentaerythritol, sucrose, polyglucoside, xylose ester, neopentyl glycol, hexanediol, butanediol, decanediol, octanediol, and trimethylolpropane.
- the alcohol having 5 or more carbon atoms is preferably sorbitan, sorbitol or sucrose.
- the alcohol having 5 or more carbon atoms one having a cyclic structure is preferable.
- the cyclic structure include a sucrose structure, a sorbitan structure, a polyglucoside structure, and the like, but those having a sorbitan structure are preferable from the viewpoint of the hydrophilicity of the nonwoven fabric and the suppression of change over time.
- the fatty acid preferably has 6 or more carbon atoms.
- the carbon number of the fatty acid is 6 or more, the affinity with the nonwoven fabric is improved, and a nonwoven fabric having high durability and hydrophilicity can be obtained.
- Examples include saturated or unsaturated fatty acids having 6 to 22 carbon atoms, mixed fatty acids containing these as main components, and branched fatty acids having 8 to 36 carbon atoms.
- the fatty acid may partially contain a hydroxyl group.
- fatty acids include octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tetradecanoic acid, hexadecanoic acid, octadecanoic acid, cis-9-octadecenoic acid, eicosanoic acid, docosanoic acid, tetracosanoic acid, Examples include hexacosanoic acid, octacosanoic acid, 2-ethylhexylic acid, and isostearic acid, and naturally occurring mixed fatty acids such as coconut oil fatty acid and beef tallow fatty acid may also be used.
- the ester compound has an ester structure of the alcohol having 5 or more carbon atoms and the fatty acid, but may be a monoester and has an ester up to the same valence as the hydroxyl group of the alcohol. can be anything.
- the ester compound is preferably a monoester from the viewpoint of hydrophilic expression of the nonwoven fabric and suppression of change over time.
- ester compound examples include glycerin fatty acid ester, pentaerythritol fatty acid ester, sorbitol fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester. Fatty acid esters are preferred.
- the ester compound is preferably contained in an amount of 50% by mass or more and 95% by mass or less when the hydrophilic agent for fibers is taken as 100% by mass.
- the content of the ester compound is preferably 60% by mass or more, more preferably 70% by mass or more, from the viewpoint of repeated hydrophilicity. 90% by mass or less is preferable, and 85% by mass or less is more preferable.
- ester compounds used as fiber hydrophilizing agents have a high affinity with fiber materials such as non-woven fabrics that serve as base materials.
- the agent adheres excessively, and the stability of the agent during coating may not be ensured after the start and end of coating.
- a method such as a spray method or rotor dampening is used, it is possible to reduce the difference in adhesion rate of the hydrophilic agent before and after the start of coating such as kissing and gravure, but the dilution stability of the ester compound in water is poor.
- the hydrophilic performance will vary.
- the term "(fiber) base material” refers to a sheet-like fiber material before being coated with a fiber treatment agent, and the base material can be a woven fabric, a knitted fabric, or a non-woven fabric.
- an anionic surfactant was blended as an agent having low affinity with the base material to prepare a fiber hydrophilic agent. It was unexpectedly found that the adhesion state of the agent during coating was stabilized by constituting Examples of such anionic surfactants include carboxylate, sulfate, sulfonate, and phosphate ester types. Among them, sulfonate type surfactants can improve water hardness by adding them. It is preferable because the deposition rate of the ester compound during coating can be stabilized regardless of the .
- sulfonate-type surfactants include alkylbenzenesulfonates, alkanesulfonates, ⁇ -olefinsulfonates, dialkylsulfosuccinates, ⁇ -sulfofatty acid ester salts, N-methyl-N-alkyltaurate salts, and the like.
- dialkyl sulfosuccinate is preferred.
- the alkyl group of the dialkylsulfosuccinate may be linear or branched and preferably has 6 to 18 carbon atoms, more preferably 8 to 14 carbon atoms.
- sodium dioctylsulfosuccinate is particularly preferred.
- the blending ratio of the anionic surfactant (% by mass when the hydrophilic agent for fibers is 100% by mass) is preferably 0.5% by mass to 50% by mass or less from the viewpoint of stability of hydrophilicity and adhesion rate. , more preferably 1% by mass to 30% by mass, more preferably 1% by mass to 15% by mass.
- the blending ratio of the anionic surfactant is 0.5% by mass or more, the adhesion rate of the hydrophilic agent during coating is stabilized, and when the blending ratio is 50% by mass or less, durability tends to improve. be.
- the fiber hydrophilic agent of the present embodiment has the following general formula (1) in order to improve the touch feeling: HO-(AO) p -H (1) ⁇
- A is an alkylene group having 2 to 4 carbon atoms or a secondary alcohol having 2 to 4 carbon atoms, and p is an integer of 1 to 15. ⁇ can be further contained.
- the content of the compound of general formula (1) is preferably more than 0% by weight and 5% by weight or less relative to the hydrophilic agent.
- the hydrophilic agent of the present embodiment may include other components according to the desired purpose, as long as the desired effect is not impaired, in addition to the component represented by the general formula (1). It may contain a compound.
- various surfactants such as emulsifiers, softeners, smoothing agents, antistatic agents, and antifoaming agents can be appropriately contained.
- the adhesion amount (pure adhesion amount) of the hydrophilic agent of the present embodiment to the substrate varies depending on the purpose and application. 00% by weight, more preferably 0.25% to 1.50% by weight. If it is 0.20% by weight or more, it is easy to obtain a satisfactory hydrophilic performance even after long-term storage at high temperature, and if it is 2.00% by weight or less, there is little rewetting and the wearer feels wet. It is difficult to give a rash, and rashes and eczema on the skin are less likely to occur.
- a known method such as an immersion method, a spray method, or a coating method can be employed. may be dried using In addition, a treatment such as a corona discharge treatment, a normal pressure plasma discharge treatment, or the like may be employed as necessary before imparting the hydrophilic agent for fibers.
- the amount of the hydrophilic agent solution for fibers of the present embodiment applied to the base material is small.
- the coating amount to the substrate is preferably 65% by weight or less, more preferably 60% by weight or less, and even more preferably 50% by weight or less.
- a known method using convective heat transfer, conductive heat transfer, radiant heat transfer, etc. can be employed, and hot air circulation type, hot air penetration type, infrared heater type. , a method of blowing hot air on both sides of the substrate, a method of introducing the substrate into a heated gas, and various other drying methods can be used.
- a nonwoven fabric containing the fiber hydrophilic agent of the present embodiment is also an embodiment of the present invention.
- the nonwoven fabric of the present embodiment may be, for example, a long-fiber nonwoven fabric produced by a spunbond method using a thermoplastic resin as a raw material, or a short-fiber nonwoven fabric produced by a carding method, a wet papermaking method, or the like.
- a long-fiber nonwoven fabric produced by a spunbond method is preferable from the viewpoints of strength and productivity, ease of imparting characteristics to the nonwoven fabric surface structure, reduction of irritation to the skin, and the like.
- long fibers refer to fibers having a fiber length of 100 mm or more.
- the shape of the fibers constituting the nonwoven fabric of the present embodiment is not limited to general round shapes, but also special shapes such as fibers with irregular cross sections such as flat and Y-shaped cross sections, hollow fibers, crimped fibers, and multicomponent fibers. can be used, and is not particularly limited.
- the nonwoven fabric of this embodiment is composed of crimped yarns, it is preferably composed of fibers having 5 crimps/inch or more in order to obtain a bulky feel.
- the web constituting the nonwoven fabric of the present embodiment may be a single layer, but may be a laminate of a web (S) formed by a spunbond method and a web (M) melt-spun by a meltblown method.
- the lamination state may be SS, SSS, SSSS, or SM, SMS, SMMS, SMSMS.
- the fiber diameter and shape may be different for each layer.
- Bonding of these laminated webs includes a method of bonding using an adhesive, a method of bonding with low-melting-point fibers or composite fibers, a method of melting and bonding by sprinkling a hot-melt binder during web formation, needle punching, A method such as mechanical entangling such as entangling with a water flow or the like is possible.
- a bonding method using hot air is preferable from the viewpoint of obtaining a bulky nonwoven fabric and maintaining the texture.
- a method of joining by partial thermocompression bonding is preferable.
- thermocompression bonding for example, a web can be passed between heated embossing/flat rolls that can provide pinpoint-shaped, elliptical-shaped, diamond-shaped, rectangular-shaped joining points, or the like.
- the thermocompression bonding area ratio in partial thermocompression bonding is preferably 5 to 40%, more preferably 5 to 25%, from the viewpoint of strength retention and flexibility.
- thermoplastic resin examples include polyolefin resins such as polyethylene, polypropylene, and copolymerized polypropylene polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and copolymerized polyester.
- Polyamide resins such as polyester resins such as nylon-6, nylon-66, and copolymerized nylon
- biodegradable resins such as polylactic acid, polybutylene succinate, and polyethylene succinate, but are not particularly limited. .
- the thermoplastic resin may be petroleum-derived or biomass-derived, and may be, for example, polyolefin-based resins such as bio-polyethylene and bio-polypropylene, and polyester-based resins such as bio-polyethylene terephthalate. Polyolefin-based resins are preferred from the viewpoint of texture of the nonwoven fabric, versatility in disposable material applications, and convenience of collection.
- the thermoplastic resin fiber may be composed of one type of resin, or may be a combination of two or more types of resin such as side-by-side or sheath-core, and is not particularly limited.
- the average fiber diameter of the fibers constituting the nonwoven fabric of the present embodiment is preferably 8.0 to 40.0 ⁇ m, more preferably 9.0 to 33.5 ⁇ m, still more preferably 11.0 ⁇ m to 26.5. be.
- the average fiber diameter is preferably 8 ⁇ m or more from the viewpoint of spinning stability, and preferably 40 ⁇ m or less from the viewpoint of the texture of the nonwoven fabric for sanitary material applications.
- the basis weight of the nonwoven fabric of the present embodiment is preferably 8 g/m 2 to 80 g/m 2 , more preferably 10 g/m 2 to 40 g/m 2 or less, still more preferably 10 g/m 2 to 30 g/m 2 .
- strength is satisfied when the basis weight is 8 g/m 2 or more, and texture is satisfied when it is 80 g/m 2 or less, and there is a tendency that it is difficult to give an impression of thick appearance.
- the nonwoven fabric of this embodiment maintain a certain level of hydrophilic performance when stored in a place with high temperature.
- the hydrophilic agent for fibers penetrates into the inside of the fibers, and the concentration of the hydrophilic agent for fibers on the surface of the fibers decreases, which may reduce the hydrophilicity.
- the reduction rate of the hydrophilic agent after storage at 70° C. for one week is preferably 30% or less, more preferably 25% or less, compared to the adhesion rate before storage.
- the present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited only to the following examples.
- the evaluation method of each characteristic as follows was used. Unless otherwise specified, evaluations are made at room temperature. The physical properties obtained are shown in Tables 1-4 below.
- the machine direction in the production of nonwoven fabric is called the MD direction
- the width direction perpendicular to that direction is called the CD direction.
- Average fiber diameter ( ⁇ m) The nonwoven fabric was divided into 5 equal parts in the CD direction, and 1 cm square test pieces were taken, and the diameter of each fiber was measured at 20 points with a microscope VHX-700F manufactured by Keyence Corporation, and the average value was obtained.
- Fabric weight of nonwoven fabric (g/m 2 ) According to JIS-L1906, 5 test pieces of 20 cm in the MD direction ⁇ 5 cm in the CD direction are collected so that the collection positions are even in the CD direction of the nonwoven fabric, the mass is measured, and the average value is the weight per unit area. It was calculated as a basis weight (g/m 2 ) by conversion.
- Change rate of adhesion rate (change rate of hydrophilic agent adhesion rate inside and outside nonwoven fabric roll)
- the roll thickness is the distance obtained by subtracting the paper tube radius from the non-woven fabric roll radius
- the 10% roll thickness on the paper tube side is the inner layer ( Inner layer)
- 10% of the outermost layer thickness of the nonwoven fabric roll is taken as an outer layer (outer layer).
- the middle of the winding is the position of 45% to 55% of the total winding length from the winding start to the winding end.
- Hydrophilic agent adhesion rate (wt%) The adhesion rate of the hydrophilic agent to the fiber surface was measured by a rapid extraction method using a rapid residual fat extractor (OC-1 type) manufactured by Intec Co., Ltd., and the average value was taken as the adhesion rate.
- the details of the method for measuring the adhesion rate are as follows. (1) A nonwoven fabric treated with a hydrophilic agent is sampled at 2 g ⁇ 0.5 g, and the weight (A) is measured. (2) Weigh the weight (B) of the aluminum pan for receiving the extract and set it on the heater set at 150° C. of the extractor. (3) The sampled nonwoven fabric is filled in a metal cylinder.
- hydrophilic nonwoven fabric was collected from the outside of the roll so as to weigh 2 g ⁇ 0.5 g, and placed in a hot air oven set at 70°C. Place the bag on a shelf plate in the hot air oven when putting it in, and hold down 5 cm from both ends with a weight so that the hydrophilic nonwoven fabric is not blown away by the hot air.
- the hydrophilic nonwoven fabric may be folded into a suitable size so as not to protrude from the shelf board of the oven.
- MFR melt flow rate
- a filament group was extruded by a spunbond method at a spinning temperature of 220° C. and extruded toward a moving collection surface using a high-speed air jet pulling device to prepare a filament web having an average fiber diameter of 17 ⁇ m. Then, the obtained filament web was flat-rolled and embossed-rolled at a top and bottom temperature of 135° C.
- r-PP ethylene/propylene random copolymer resin having an ethylene component content of 4.3 mol% and an MFR of 24 was spun-bonded at a discharge rate of 0.84 g/min.hole at a spinning temperature. Extrusion was carried out at 230° C., and this filament group was extruded toward a moving collecting surface using a high-speed pulling device with an air jet to produce a filament web having an average fiber diameter of 17 ⁇ m.
- the fibers of the obtained filament web were partially pressed against each other using the same flat roll/embossing roll as used in the production of the nonwoven fabric (1) under the conditions of a vertical temperature of 135°C and a pressure of 60 kg/cm 2 . , the line speed was adjusted so that the target basis weight was 18 g/m 2 to obtain a long fiber nonwoven fabric (2).
- a polypropylene (PP) resin having an MFR of 55 g/10 min (according to JIS-K7210, measured at a temperature of 230° C. and a load of 2.16 kg) is used as the first component, and an MFR of 26 g/10 min (according to JIS-K7210, (measured at a temperature of 190° C. and a load of 2.16 kg) was used as the second component.
- the filament was extruded at a spinning temperature of 220°C by a spunbond method so that the total discharge amount was 0.8 g/min.hole at 4 g/min.hole and the ratio of the first component to the second component was 1/1.
- a group was extruded toward a moving collecting surface using a high-speed airflow drawing device with an air jet to prepare an eccentric sheath-core type composite filament web having an average fiber diameter of 18 ⁇ m.
- the obtained eccentric sheath-core type composite long fiber nonwoven web was rolled at 100° C. with a flat roll and an embossed roll (pattern specifications: circle diameter 1.00 mm, staggered arrangement, horizontal pitch 4.4 mm, vertical pitch 4.4 mm, The fibers are temporarily bonded together by passing them through a crimping area ratio of 7.9%), then the fibers are bonded together by hot air with a hot air temperature of 140 ° C. and a hot air velocity of 1.0 m / s, and the basis weight is 18 g / m 2
- a composite long fiber nonwoven fabric (3) with a shrinkage number of 17 pieces/inch was obtained.
- Sorbitan monolaurate (“Rheodol SP-L10” manufactured by Kao Corporation, the same shall apply hereinafter) and sodium dioctyl sulfosuccinate (manufactured by Tokyo Kasei Kogyo Co., Ltd.; the same shall apply hereinafter) are uniformly mixed at 25° C. in the ratio shown in Table 1 below.
- a hydrophilic agent an aqueous solution of the hydrophilic agent adjusted to 5 wt % was applied to the long fiber nonwoven fabric (1) at a liquid temperature of 25 ° C. with a kiss coater so that the coating amount was 10 wt %. Coated while adjusting the angle.
- Example 2 Sorbitan monocaprate (“Sorbon S-10E” manufactured by Toho Chemical Industry Co., Ltd., the same shall apply hereinafter) and sodium dioctyl sulfosuccinate are uniformly mixed at 25° C. in the ratio shown in Table 1 below, and the mixture is made into a long-fiber nonwoven fabric (1). , was coated in the same manner as in Example 1, and 10,000 m of rewound roll was obtained as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 1 below.
- Example 3 Sorbitan monolaurate and sodium dioctyl sulfosuccinate were uniformly mixed at a ratio shown in Table 1 below, and a 5% by weight aqueous solution of the mixture was applied to the long fiber nonwoven fabric (1) so that the coating amount was 10% by weight. was applied by a rotor dampening (RD) method, passed through an air-through dryer at 125° C. to dry, and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- RD rotor dampening
- the diameter of the rotors of the rotor dampening apparatus used was 80 mm, and the rotors were arranged at intervals of 115 mm in the CD direction so that the distance between the center of the rotor and the nonwoven fabric to be applied was 180 mm.
- the rotor rotation speed was adjusted so that the spray particle size of the sprayed fiber processing agent was 35 ⁇ m.
- Table 1 Various measurement results of the obtained nonwoven fabric are shown in Table 1 below.
- Example 4 Polyethylene glycol having a molecular weight of 400 (manufactured by Kanto Kagaku, hereinafter the same), sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at a ratio shown in Table 1 below at 25°C. Adjust the liquid temperature to 20° C., apply the solution to the long fiber nonwoven fabric (1) using a gravure roll with a diagonal pattern of 120 mesh and a cell volume of 22 cm 3 /m 2 so that the application amount is 30% by weight, and then, It was passed through a cylinder drier at 120° C. to dry and wound up with a roll length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 1 below.
- Example 5 Polyethylene glycol with a molecular weight of 300 (manufactured by Kanto Kagaku, hereinafter the same), sorbitan monolaurate, and alkylbenzene sulfonate (“Lipon LS-250” manufactured by Lion) were uniformly mixed at 25° C. in the ratios shown in Table 1 below.
- the resulting product was coated on a long fiber nonwoven fabric (1) in the same manner as in Example 1 and wound up with a winding length of 10010 m.
- the obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 1 Various measurement results of the obtained nonwoven fabric are shown in Table 1 below.
- Example 6 Polyethylene glycol with a molecular weight of 300, sorbitan monolaurate, and ⁇ -olefin sulfonate ("K Liporan PJ-400CJ" manufactured by Lion) were uniformly mixed at 25 ° C. in the ratios shown in Table 1 below, and long fibers were prepared.
- the nonwoven fabric (1) was coated in the same manner as in Example 1 and wound up with a winding length of 10,010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 1 Various measurement results of the obtained nonwoven fabric are shown in Table 1 below.
- Example 8 Sorbitan monooleate (“Rheodol SP-P10V” manufactured by Kao Corporation) and dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratio shown in Table 2 below, and the mixture was applied to the long fiber nonwoven fabric (1) in Example 1. It was coated in the same manner as , and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 9 Sorbitan monolaurate and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 2 below. A length of 10010 m was taken up. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 10 Polyethylene glycol having a molecular weight of 300, sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 2 below, and applied to the long fiber nonwoven fabric (1) in the same manner as in Example 1. and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 11 Polyethylene glycol having a molecular weight of 300, sorbitan monocaprate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 2 below, and the mixture was applied to the long-fiber nonwoven fabric (1) in the same manner as in Example 1. It was machined and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 12 Polyethylene glycol having a molecular weight of 400, sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 2 below, and the mixture was applied to the long-fiber nonwoven fabric (1) in the same manner as in Example 4. It was coated and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 13 Polyethylene glycol having a molecular weight of 400, sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 2 below. A sample was obtained in the same manner as in Example 6, except that the concentration of the water-permeable agent was adjusted so as to be 1%. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 14 Sorbitan monolaurate and dioctylsulfosuccinic acid were uniformly mixed at 25° C. in the ratios shown in Table 2 below, and the mixture was applied to the long fiber nonwoven fabric (1) in the same manner as in Example 1, and the winding length was 10010 m. rolled up. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 2 below.
- Example 15 Sorbitan monolaurate and dioctylsulfosuccinic acid were uniformly mixed at 25° C. in the ratios shown in Table 3 below, and the mixture was applied to the long fiber nonwoven fabric (1) in the same manner as in Example 1, and the winding length was 10010 m. rolled up. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 16 Propylene glycol (manufactured by Kanto Kagaku, Shika 1st grade), sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 3 below, and a long-fiber nonwoven fabric (1) was prepared in Examples. It was coated in the same manner as in 4 and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 17 Glycerin (manufactured by Kanto Kagaku, Shika 1st grade), sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 3 below, and a long fiber nonwoven fabric (1) was prepared in Example 1. It was coated in the same manner as , and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 18 Polyethylene glycol having a molecular weight of 400, sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 3 below, and the mixture was applied to the long-fiber nonwoven fabric (2) in the same manner as in Example 1. It was coated and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 19 Polyethylene glycol having a molecular weight of 300, sorbitan monolaurate, and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 3 below, and applied to the composite long fiber nonwoven fabric (3) in the same manner as in Example 1. and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 20 Polyethylene glycol with a molecular weight of 300, polyoxyethylene sorbitan monooleate (“Rheodol TW-O106V” manufactured by Kao Corporation) and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 3 below to form filaments.
- the nonwoven fabric (2) was coated in the same manner as in Example 1 and wound up with a winding length of 10,010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 3 Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 21 Polyethylene glycol with a molecular weight of 300, polyoxyethylene sorbitan monostearate (“Rheodol TW-S106V” manufactured by Kao Corporation), and sodium dioctyl sulfosuccinate are uniformly mixed at 25° C. in the ratios shown in Table 3 below to form filaments.
- the nonwoven fabric (2) was coated in the same manner as in Example 3 and wound up with a winding length of 10,010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 3 Various measurement results of the obtained nonwoven fabric are shown in Table 3 below.
- Example 22 Polyethylene glycol having a molecular weight of 400, polyoxyethylene sorbitan tristearate (“Rheodol TW-S320V” manufactured by Kao Corporation), and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 4 below to form a composite length.
- the fibrous nonwoven fabric (3) was coated in the same manner as in Example 1 and wound up with a winding length of 10,010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 4 Various measurement results of the obtained nonwoven fabric are shown in Table 4 below.
- Example 23 Polyethylene glycol with a molecular weight of 400, sucrose stearate (“Lyoto Sugar Ester S-570” manufactured by Mitsubishi Chemical Foods) and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 4 below.
- the long-fiber nonwoven fabric (1) was coated in the same manner as in Example 3 and wound up with a winding length of 10,010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 4 Various measurement results of the obtained nonwoven fabric are shown in Table 4 below.
- Example 24 Polyethylene glycol with a molecular weight of 300, sucrose stearate (“Lyoto Sugar Ester S-770” manufactured by Mitsubishi Chemical Foods) and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 4 below.
- the long fiber nonwoven fabric (1) was coated in the same manner as in Example 1 and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 4 Various measurement results of the obtained nonwoven fabric are shown in Table 4 below.
- Example 25 Polyethylene glycol with a molecular weight of 300, sucrose stearate (“Lyoto Sugar Ester S-970” manufactured by Mitsubishi Chemical Foods) and sodium dioctyl sulfosuccinate were uniformly mixed at 25° C. in the ratios shown in Table 4 below.
- the long fiber nonwoven fabric (1) was coated in the same manner as in Example 1 and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll.
- Table 4 Various measurement results of the obtained nonwoven fabric are shown in Table 4 below.
- Example 1 A hydrophilizing agent solution containing only sorbitan monolaurate was applied to the long fiber nonwoven fabric (1) in the same manner as in Example 1, and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. The results obtained are shown in Table 4 below.
- Example 2 A long fiber nonwoven fabric (1) was coated with a hydrophilizing agent solution containing only sorbitan monolaurate in the same manner as in Example 3, and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. The results obtained are shown in Table 4 below.
- Example 3 A hydrophilic agent solution containing only sodium dioctyl sulfosuccinate was coated on the long fiber nonwoven fabric (1) in the same manner as in Example 1, and wound up with a winding length of 10010 m. The obtained roll was rewound, and 10,000 m from the outside was used as a product roll. The results obtained are shown in Table 4 below.
- the hydrophilic nonwoven fabric obtained by treatment with the fiber hydrophilic agent of the present invention has excellent hydrophilicity, it can be suitably used as a top sheet or second sheet for sanitary materials such as sanitary napkins, incontinence pads, and disposable diapers. Furthermore, it can also be used for, for example, masks, body warmers, tape bases, patch bases, emergency bandages, packaging materials, wipes, medical gowns, bandages, clothing, skin care sheets, and the like.
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Abstract
Description
[1]炭素数5以上のアルコールと脂肪酸とが縮合したエステル化合物と、アニオン系界面活性剤とを含有することを特徴とする、繊維用親水剤。
[2]前記炭素数5以上のアルコールが多価アルコールである、前記[1]に記載の繊維用親水剤。
[3]前記炭素数5以上のアルコールが環状構造を有する、前記[1]又は[2]に記載の繊維用親水剤。
[4]前記炭素数5以上のアルコールが、ソルビタン構造又はショ糖構造を有する、前記[1]~[3]のいずれかに記載の繊維用親水剤。
[5]前記脂肪酸の炭素数が6以上である、前記[1]~[4]のいずれかに記載の繊維用親水剤。
[6]前記エステル化合物は、ソルビタン、ソルビトール及びショ糖からなる群から選ばれるアルコールと、
オクタン酸、ノナン酸、デカン酸、ウンデカン酸、ドデカン酸、テトラデカン酸、ヘキサデカン酸、オクタデカン酸、cis-9-オクタデセン酸、エイコサン酸、ドコサン酸、テトラコサン酸、ヘキサコサン酸、オクタコサン酸、2-エチルヘキシル酸、イソステアリン酸、ヤシ油脂肪酸、及び牛脂脂肪酸からなる群から選ばれる脂肪酸とが縮合したエステル化合物であり、かつ、
該エステル化合物は、前記繊維用親水剤を100質量%としたとき、50質量%~95質量%で含有される、前記[1]~[5]のいずれかに記載の繊維用親水剤。
[7]前記アニオン系界面活性剤が、スルフォン酸塩型界面活性剤である、前記[1]~[6]のいずれかに記載の繊維用親水剤。
[8]前記スルフォン酸塩型界面活性剤が、ジアルキルスルホコハク酸塩を含み、かつ、該ジアルキルスルホコハク酸塩は、前記繊維用親水剤を100質量%としたとき、1質量%~30質量%で含有される、前記[7]に記載の繊維用親水剤。
[9]下記一般式(1):
HO-(AO)p-H (1)
{式中、Aは、炭素数2~4のアルキレン基又は炭素数2~4の第2級アルコールであり、そしてpは、1~15の整数である。}で表される化合物をさらに含有する、前記[1]~[8]のいずれかに記載の繊維用親水剤。
[10]前記[1]~[9]のいずれかに記載の繊維用親水剤を含む、不織布。
[11]不織布重量に対する前記繊維用親水剤の付着率が0.1~2.0重量%である、前記[10]に記載の不織布。
[12]5個/インチ以上の捲縮を有する繊維によって構成される、前記[10]又は[11]に記載の不織布。
[13]70℃で1週間保管した時の前記繊維用親水剤の減少率が30%以下である、前記[10]~[12]のいずれか記載の不織布。
本実施形態の繊維用親水剤(以下、単に「親水剤」ともいう。)は、炭素数5以上のアルコールと脂肪酸とが縮合したエステル化合物を含有することを特徴とする。
前記炭素数5以上のアルコールとしては、ソルビタン、ソルビトール、ポリグリセリン、ひまし油、ペンタエリスリトール、ショ糖、ポリグルコシド、キシロースエステル、ネオペンチルグリコール、ヘキサンジオール、ブタンジオール、デカンジオール、オクタンジオール、トリメチロールプロパンなどが挙げられる。前記炭素数5以上のアルコールとしては、液流れ性の観点から、ソルビタン、ソルビトール又はショ糖であることが好ましい。
前記炭素数5以上のアルコールとしては、環状構造を持つものが好ましい。環状構造としては、ショ糖構造、ソルビタン構造、ポリグルコシド構造等が挙げられるが、不織布の親水性発現、経時変化抑制の観点から、ソルビタン構造をもつものが好ましい。
前記エステル化合物は、前記繊維用親水剤を100質量%としたとき、50質量%以上95質量%以下で含有されることが好ましい。前記エステル化合物の含有量は、繰返し親水性の観点から、60質量%以上であることが好ましく、70%質量以上であることが更に好ましく、また、親水剤の付着率の安定性の観点から、90質量%以下が好ましく、85質量%以下が更に好ましい。
尚、本明細書において「(繊維)基材」とは繊維用処理剤が塗工される前のシート状繊維素材を指し、該基材は織物や編物、不織布であることができる。
ジアルキルスルホコハク酸塩のアルキル基は直鎖でも分岐であってもよく、炭素数6~18が好ましく、8~14がより好ましい。ジアルキルスルホコハク酸において、ジオクチルスルホコハク酸ナトリウムが特に好ましい。
HO-(AO)p-H (1)
{式中、Aは、炭素数2~4のアルキレン基又は炭素数2~4の第2級アルコールであり、そしてpは、1~15の整数である。}で表される化合物をさらに含有することもできる。
親水性能と風合いの両立の観点から、一般式(1)の化合物の含有率は、親水剤に対して、0重量%超5重量%以下が好ましい。
本実施形態の繊維用親水剤の塗工後の乾燥には、対流伝熱、伝導伝熱、放射伝熱等を利用した公知の方法が採用でき、熱風循環型、熱風貫通型、赤外線ヒーター型、基材の両面に熱風を吹き付ける方法、加熱気体中に導入する方法等、各種の乾燥方法を用いることができる。
本実施形態の不織布は、例えば、熱可塑性樹脂を原料としたスパンボンド法により製造された長繊維不織布であっても、カード法、湿式抄造法などで製造された短繊維不織布であってもよい。強度、生産性の観点や、不織布表面構造に特徴を持たせやすいこと、肌への刺激低減などの観点から、スパンボンド法により製造された長繊維不織布が好ましい。本願明細書中、長繊維とは、繊維長が100mm以上のものという。また、本実施形態の不織布を構成する繊維の形態は、一般的な丸形のみでなく断面が扁平やY型などの異型断面繊維、中空糸や捲縮糸、多成分糸などの特殊な形態のものを用いることができ、特に限定されるものではない。本実施形態の不織布が捲縮糸で構成される場合、嵩高な触感を得るため、5個/インチ以上の捲縮を有する繊維によって構成されることが好ましい。
不織布のCD方向に5等分して1cm角の試験片を採取し、キーエンス社製マイクロスコープVHX-700Fで繊維の直径を各20点ずつ測定し、その平均値を求めた。
JIS-L1906に準じ、MD方向20cm×CD方向5cmの試験片を不織布のCD方向に採取位置が均等になるように5枚採取して質量を測定し、その平均値を単位面積あたりの重量に換算して目付(g/m2)として求めた。
繊維用親水剤を連続塗工した後に紙管に巻き取り製造した不織布ロールにおいて、不織布ロール半径から紙管半径を差し引いた距離を巻厚とした時、紙管側10%の巻厚を内層(巻内)とし、不織布ロール最外側10%の巻厚を外層(巻外)とする。尚、巻中は巻始めから巻き終わりまでの全巻長の45%~55%の位置とする。不織布ロールを切り開き、上記各々範囲内の位置において下記記載の親水剤付着率の測定を行ない、下記の計算式:
(付着率の変化率(R/X))={(巻内、巻中、巻外から選ばれる最大付着率)-(巻内、巻中、巻外から選ばれる最小付着率)}/(巻内、巻中、巻外の平均付着率)×100により付着率の変化率を求めた。
繊維表面への親水剤の付着率は、インテック社 迅速残脂抽出装置(OC-1型)を用い、迅速抽出法によりN=3で測定し、平均値を付着率とした。付着率の測定方法の詳細は以下の通りである。
(1)親水剤で処理された不織布を2g±0.5gとなる様にサンプリングし、重量(A)を測定する。
(2)抽出液を受けるアルミニウム皿の重量(B)を量り、抽出機の150℃に設定されたヒーターの上にセットする。
(3)サンプリングした不織布を金属製の筒に充填する。
(4)金属製の筒内にメタノールを10cc添加し、不織布を濡らす。
(5)筒の上部に蓋をし、3分間静置する。これを抽出時間とする。
(6)3分経過後、付属のハンドルを用いて筒内のメタノールを含有させた不織布から、メタノールを搾り取り、アルミトレイ内に滴下する。
(7)アルミトレイ内に滴下されたメタノールが蒸発したことを目視で確認後、(2)~(7)の操作をもう一度行う。
(8)メタノールが完全に蒸発したことを目視で確認後、ヒーターからアルミニウム皿を取り外し、2分間空冷する。
(9)アルミニウム皿の重量(C)を測定する。
(10)不織布に付着している処理剤の量を下記式:
親水剤付着率[wt%]={(アルミ皿の重量C)-(アルミ皿の重量B)}/不織布重量(A)×100
から算出する。
ロールの巻外から2g±0.5gとなる様に親水不織布を採取し、70℃に設定した熱風オーブンに投入する。投入の際は熱風オーブン中の棚板の上に乗せ、親水不織布が熱風で飛ばない様に両端5cmを、錘で抑える。尚、オーブンの棚板からはみ出さない様に親水不織布を適当なサイズに折りたたんでも構わない。1週間経過した後、オーブンから親水不織布を取り出し、錘を乗せていた布の両端5cmを鋏で切断し取り除いた後、親水剤付着率を測定した。
オーブン保管前後での付着率から、下記式:
(繊維用親水剤の減少率)={(70℃保管前の親水剤付着率)-(70℃保管後の親水剤付着率)}/(70℃保管前の親水剤付着率)×100
以下繊維用親水剤の減少率(%)を算出した。
45度に傾斜した板上に吸収体としてトイレットペーパー(イトマン株式会社製ハードシングル1R55m)を10枚重ねて、その上に試験布(20cm角)を置いてセットし、布の上方10mmの高さから0.05gの生理食塩水を滴下した。滴下位置から吸収終了までの生理食塩水が流れ落ちた距離を読み取った。この測定を試験布内で任意に20点行い、その平均値を液流れ性(mm)とした。液流れ性の値は小さいほど好ましい。
吸収体としてトイレットペーパー(イトマン株式会社製ハードシングル1R55m)を10枚重ねて、その上に試験布(20cm×30cm)を置く。さらにその上に直径1.5cmの穴を等間隔に10ヶ所開けたステンレス製の板を置き、それぞれの穴に位置する布の上方10mmの高さから生理食塩水0.05gを滴下し、3分経過後、再度同様に滴下する。3回目の滴下後、10秒以内に吸収される穴の数を数える。4回目と5回目も同様に行い、これらを繰り返し親水性とした。
評価者10名が不織布の両面を、手でなぞって触ったときの滑らかさに基づき、以下の評価基準で判定した。
◎:非常に良い
〇:良い(基準:エルタスP03018 旭化成(株)製を使用)
×:悪い。
メルトフローレート(MFR)が55g/10分(JIS-K7210に準じ、温度230℃、荷重2.16kgで測定)のポリプロピレン(PP)樹脂を、吐出量0.88g/分・hоleとなるようにスパンボンド法で、紡糸温度220℃で押出し、このフィラメント群をエアジェットによる高速牽引装置を使用して、移動捕集面に向けて押出し、平均繊維径17μmの長繊維ウェブを調製した。
次いで、得られた長繊維ウェブを上下温度135℃、圧力60kg/cm2でのフラットロールとエンボスロール(パターン仕様:直径0.425mm円形、千鳥配列、横ピッチ2.1mm、縦ピッチ1.1mm、圧着面積率6.3%)の間に通して繊維同士を部分圧着して、目的とする目付が13g/m2となるようにライン速度を調整し、長繊維不織布(1)を得た。
エチレン成分含有量が4.3モル%、MFRが24のエチレン・プロピレンランダム共重合体樹脂(r-PP)を、吐出量0.84g/分・hоleとなるようにスパンボンド法で、紡糸温度230℃で押出し、このフィラメント群をエアジェットによる高速牽引装置を使用して、移動捕集面に向けて押出し、平均繊維径17μmの長繊維ウェブを作製した。次いで、得られた長繊維ウェブを不織布の製造(1)で使用したものと同じフラットロール/エンボスロールを用いて上下温度135℃、圧力60kg/cm2の条件で、繊維同士を部分圧着して、目的とする目付が18g/m2となるようにライン速度を調整し、長繊維不織布(2)を得た。
MFRが55g/10分(JIS-K7210に準じ、温度230℃、荷重2.16kgで測定)のポリプロピレン(PP)樹脂を、第1成分とし、MFRが26g/10分(JIS-K7210に準じ、温度190℃、荷重2.16kgで測定)の高密度ポリエチレン(HDPE)樹脂を、第2成分とし、第1成分の吐出量が0.4g/分・hоle、第2成分の吐出量が0.4g/分・hоleで全吐出量が0.8g/分・hоleであり、第1成分と第2成分の比が1/1となるようにスパンボンド法により紡糸温度220℃で押出し、このフィラメント群をエアジェットによる高速気流牽引装置を使用して、移動捕集面に向けて押出し平均繊維径18μの偏芯鞘芯型複合長繊維ウェブを調製した。
次いで、得られた偏芯鞘芯型複合長繊維不織ウェブを100℃のフラットロールとエンボスロール(パターン仕様:直径1.00mm円形、千鳥配列、横ピッチ4.4mm、縦ピッチ4.4mm、圧着面積率7.9%)の間に通して繊維同士を仮接着し、次いで、熱風温度140℃、熱風風速1.0m/sの熱風により繊維同士を接着し、目付18g/m2、捲縮数17個/インチの複合長繊維不織布(3)を得た。
ソルビタンモノラウレート(花王製「レオドールSP-L10」、以下同様)とジオクチルスルホコハク酸ナトリウム(東京化成工業製、以下同様)を、以下の表1に示す比率で、25℃で均一に混合したもの親水剤とし、長繊維不織布(1)に、5wt%に調整した該親水剤の水溶液を液温25℃でキスコーターにて、塗工量が10wt%となるように、ステンレス製アプリケーターロールへの抱角を調整しながら塗工した。次いで、120℃のシリンダードライヤーに通して乾燥させ、巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表1に示す。
ソルビタンモノカプレート(東邦化学工業製「ソルボンS-10E」、以下同様)とジオクチルスルホコハク酸ナトリウムを、以下の表1に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に、実施例1と同様の方式で塗工し、巻き返した10000m分を製品ロールとして得た。得られた不織布の各種測定結果を以下の表1に示す。
ソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表1に示す比率で、25℃で均一に混合したものの5重量%水溶液を、長繊維不織布(1)に塗布量が10重量%になるようにローターダンプニング(RD)方式にて塗布し、125℃のエアスルードライヤーに通して乾燥させ、巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。使用したローターダンプニング装置のローターの直径は80mmであり、各ローターは、CD方向に115mm間隔、塗布する不織布とのローター中心の距離を180mmとなるように配置した。また、ローター回転数を調整し、噴霧される繊維加工剤の噴霧粒子径が35μmとなるようにした。得られた不織布の各種測定結果を以下の表1に示す。
分子量400のポリエチレングリコール(関東化学製、以下同様)とソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表1に示す比率で、25℃で均一に混合したものの1.66重量%水溶液を、液温20℃に調整し、塗布量が30重量%となるように、斜線柄120メッシュ、セル容積22cm3/m2のグラビアロールを用いて、長繊維不織布(1)に塗布し、次いで、120℃のシリンダードライヤーに通して乾燥させ巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表1に示す。
分子量300のポリエチレングリコール(関東化学製、以下同様)とソルビタンモノラウレートとアルキルベンゼンスルホン酸塩(ライオン製「ライポンLS-250」)を、以下の表1に示す比率で、25℃で均一に混合したものを、長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表1に示す。
分子量300のポリエチレングリコールとソルビタンモノラウレートとαオレフィンスルホン酸塩(ライオン製「KリポランPJ-400CJ」)を、以下の表1に示す比率で、25℃で均一に混合したものを、長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表1に示す。
ソルビタンモノパルミテート(花王製「レオドールSP-P10」)とジオクチルスルホコハク酸塩を、以下の表1に示す比率で、25℃で均一に混合したものを、長繊維不織布(1)に実施例4と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表1に示す。
ソルビタンモノオレエート(花王製「レオドールSP-P10V」)とジオクチルスルホコハク酸塩を、以下の表2に示す比率で、25℃で均一に混合したものを、長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表2に示す。
ソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表2に記載の比率で、25℃で均一に混合したものを、長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表2に示す。
分子量300のポリエチレングリコールとソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表2に示す比率で、25℃で均一に混合したものを、長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表2に示す。
分子量300のポリエチレングリコールとソルビタンモノカプレートとジオクチルスルホコハク酸ナトリウムを、以下の表2に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表2に示す。
分子量400のポリエチレングリコールとソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表2に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例4と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表2に示す。
分子量400のポリエチレングリコールとソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表2に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に純分付着率が0.84wt%となる様に透水剤濃度を調整し塗工した以外は、実施例6と同様の方法でサンプルを得た。得られた不織布の各種測定結果を以下の表2に示す。
ソルビタンモノラウレートとジオクチルスルホコハク酸を、以下の表2に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表2に示す。
ソルビタンモノラウレートとジオクチルスルホコハク酸を、以下の表3に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
プロピレングリコール(関東化学製、鹿1級)とソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表3に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例4と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
グリセリン(関東化学製、鹿1級)とソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表3に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
分子量400のポリエチレングリコールとソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表3に示す比率で、25℃で均一に混合したものを長繊維不織布(2)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
分子量300のポリエチレングリコールとソルビタンモノラウレートとジオクチルスルホコハク酸ナトリウムを、以下の表3に示す比率で、25℃で均一に混合したものを複合長繊維不織布(3)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
分子量300のポリエチレングリコールとポリオキシエチレンソルビタンモノオレエート(花王製「レオドールTW-O106V」)とジオクチルスルホコハク酸ナトリウムを、以下の表3に示す比率で、25℃で均一に混合したものを長繊維不織布(2)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
分子量300のポリエチレングリコールとポリオキシエチレンソルビタンモノステアレート(花王製「レオドールTW-S106V」)とジオクチルスルホコハク酸ナトリウムを、以下の表3に示す比率で、25℃で均一に混合したものを長繊維不織布(2)に実施例3と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表3に示す。
分子量400のポリエチレングリコールとポリオキシエチレンソルビタントリステアレート(花王製「レオドールTW-S320V」)とジオクチルスルホコハク酸ナトリウムを、以下の表4に示す比率で、25℃で均一に混合したものを複合長繊維不織布(3)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表4に示す。
分子量400のポリエチレングリコールとショ糖ステアリン酸エステル(三菱ケミカルフーズ製「リョート シュガーエステルS-570」)とジオクチルスルホコハク酸ナトリウムを、以下の表4に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例3と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表4に示す。
分子量300のポリエチレングリコールとショ糖ステアリン酸エステル(三菱ケミカルフーズ製「リョート シュガーエステルS-770」)とジオクチルスルホコハク酸ナトリウムを、以下の表4に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表4に示す。
分子量300のポリエチレングリコールとショ糖ステアリン酸エステル(三菱ケミカルフーズ製「リョート シュガーエステルS-970」)とジオクチルスルホコハク酸ナトリウムを、以下の表4に示す比率で、25℃で均一に混合したものを長繊維不織布(1)に実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた不織布の各種測定結果を以下の表4に示す。
長繊維不織布(1)に、ソルビタンモノラウレートのみを含有する親水剤溶液を実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた結果を以下の表4に示す。
長繊維不織布(1)、ソルビタンモノラウレートのみを含有する親水剤溶液を実施例3と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた結果を以下の表4に示す。
長繊維不織布(1)に、ジオクチルスルホコハク酸ナトリウムのみを含有する親水剤溶液を実施例1と同様の方式で塗工し巻長10010mで巻き取った。得られたロールは巻き返し、巻外から10000m分を製品ロールとした。得られた結果を以下の表4に示す。
Claims (13)
- 炭素数5以上のアルコールと脂肪酸とが縮合したエステル化合物と、アニオン系界面活性剤とを含有することを特徴とする、繊維用親水剤。
- 前記炭素数5以上のアルコールが多価アルコールである、請求項1に記載の繊維用親水剤。
- 前記炭素数5以上のアルコールが環状構造を有する、請求項1又は2に記載の繊維用親水剤。
- 前記炭素数5以上のアルコールが、ソルビタン構造又はショ糖構造を有する、請求項1~3のいずれか1項に記載の繊維用親水剤。
- 前記脂肪酸の炭素数が6以上である、請求項1~4のいずれか1項に記載の繊維用親水剤。
- 前記エステル化合物は、ソルビタン、ソルビトール及びショ糖からなる群から選ばれるアルコールと、
オクタン酸、ノナン酸、デカン酸、ウンデカン酸、ドデカン酸、テトラデカン酸、ヘキサデカン酸、オクタデカン酸、cis-9-オクタデセン酸、エイコサン酸、ドコサン酸、テトラコサン酸、ヘキサコサン酸、オクタコサン酸、2-エチルヘキシル酸、イソステアリン酸、ヤシ油脂肪酸、及び牛脂脂肪酸からなる群から選ばれる脂肪酸とが縮合したエステル化合物であり、かつ、
該エステル化合物は、前記繊維用親水剤を100質量%としたとき、50質量%~95質量%で含有される、請求項1~5のいずれか1項に記載の繊維用親水剤。 - 前記アニオン系界面活性剤が、スルフォン酸塩型界面活性剤である、請求項1~6のいずれか1項に記載の繊維用親水剤。
- 前記スルフォン酸塩型界面活性剤が、ジアルキルスルホコハク酸塩を含み、かつ、該ジアルキルスルホコハク酸塩は、前記繊維用親水剤を100質量%としたとき、1質量%~30質量%で含有される、請求項7に記載の繊維用親水剤。
- 下記一般式(1):
HO-(AO)p-H (1)
{式中、Aは、炭素数2~4のアルキレン基又は炭素数2~4の第2級アルコールであり、そしてpは、1~15の整数である。}で表される化合物をさらに含有する、請求項1~8のいずれか1項に記載の繊維用親水剤。 - 請求項1~9のいずれか1項に記載の繊維用親水剤を含む、不織布。
- 不織布重量に対する前記繊維用親水剤の付着率が0.1~2.0重量%である、請求項10に記載の不織布。
- 5個/インチ以上の捲縮を有する繊維によって構成される、請求項10又は11に記載の不織布。
- 70℃で1週間保管した時の前記繊維用親水剤の減少率が30%以下である、請求項10~12のいずれか1項に記載の不織布。
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JP2010261115A (ja) * | 2009-04-30 | 2010-11-18 | Es Fibervisions Co Ltd | 抗ウイルス性を有する硫酸化セルロースを担持させた繊維集合体 |
JP2012153736A (ja) * | 2012-05-25 | 2012-08-16 | Asahi Kasei Chemicals Corp | 湿潤ワイパー |
WO2017179405A1 (ja) * | 2016-04-12 | 2017-10-19 | 松本油脂製薬株式会社 | 不織布製造用処理剤及びその利用 |
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JP2010261115A (ja) * | 2009-04-30 | 2010-11-18 | Es Fibervisions Co Ltd | 抗ウイルス性を有する硫酸化セルロースを担持させた繊維集合体 |
JP2012153736A (ja) * | 2012-05-25 | 2012-08-16 | Asahi Kasei Chemicals Corp | 湿潤ワイパー |
WO2017179405A1 (ja) * | 2016-04-12 | 2017-10-19 | 松本油脂製薬株式会社 | 不織布製造用処理剤及びその利用 |
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JP2020143411A (ja) * | 2019-03-08 | 2020-09-10 | 三井化学株式会社 | 不織布、積層体、被覆シート、及び不織布の製造方法 |
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