WO2018221348A1 - 人工毛髪用繊維 - Google Patents
人工毛髪用繊維 Download PDFInfo
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- WO2018221348A1 WO2018221348A1 PCT/JP2018/019835 JP2018019835W WO2018221348A1 WO 2018221348 A1 WO2018221348 A1 WO 2018221348A1 JP 2018019835 W JP2018019835 W JP 2018019835W WO 2018221348 A1 WO2018221348 A1 WO 2018221348A1
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- protrusion
- chloride resin
- polyvinyl chloride
- artificial hair
- fiber
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
- A41G3/00—Wigs
- A41G3/0083—Filaments for making wigs
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/16—Macromolecular materials obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/014—Stabilisers against oxidation, heat, light or ozone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/07—Addition of substances to the spinning solution or to the melt for making fire- or flame-proof filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/09—Addition of substances to the spinning solution or to the melt for making electroconductive or anti-static filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/48—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of halogenated hydrocarbons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/18—Materials or treatment for tissue regeneration for hair reconstruction
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/12—Applications used for fibers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
- D01F6/10—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons from polyvinyl chloride or polyvinylidene chloride
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2503/00—Domestic or personal
- D10B2503/08—Wigs
Definitions
- the present invention relates to a fiber for artificial hair using a polyvinyl chloride resin composition.
- Polyvinyl chloride fiber has excellent strength and elongation, and is often used as a fiber for artificial hair constituting hair ornaments.
- artificial hair fibers including polyvinyl chloride fibers are not yet satisfactory in terms of low glossiness, grip properties during braiding, and spinnability, and trial and error are repeated.
- Patent Document 1 a low-gloss is made by making a dent on each side of the cross section, but that alone is not sufficient.
- Patent Document 2 a cross-linked vinyl chloride resin is added to impart low gloss to a vinyl chloride resin, and a methacrylic acid alkyl ester is added to improve spinnability. It is insufficient.
- Patent Document 3 proposes a shape composed of a resin composition of a vinyl chloride resin and a cross-linked vinyl chloride resin that defines a viscosity average molecular weight, and the cross-sectional shape is a circle, a parabola, or an ellipse. There is a problem that the low glossiness is insufficient and the yarn slips when the yarn is knitted, making it difficult to knit.
- Patent Document 4 the bulkiness and the ease of weaving the yarn are imparted in the Y-shaped shape having projections in three directions.
- this Y-shaped shape and material design light is reflected by the straight Y portion. Therefore, the low glossiness is insufficient.
- this Y-shaped shape the contact area between the yarns is reduced, and the frictional resistance is reduced, so that it becomes easy to slip.
- An object of the present invention is to provide a polyvinyl chloride artificial hair fiber that is excellent in low glossiness, has a grip performance when braided, and can be stably spun.
- the inventors used a specific polyvinyl chloride resin composition, and the cross-sectional shape has protrusions in three directions, and the length and width of each protrusion satisfy a predetermined condition. It has been found that a polyvinyl chloride-based artificial hair fiber excellent in low glossiness, gripping property during braiding, and spinning property can be obtained. That is, the present invention employs the following means in order to solve the above problems.
- a fiber for artificial hair containing a polyvinyl chloride resin composition The polyvinyl chloride resin composition has a viscosity average degree of polymerization of 90 to 99 parts by weight of a polyvinyl chloride resin (A) having a viscosity average degree of polymerization of 450 to 1700, and a viscosity average degree of polymerization of a component dissolved in tetrahydrofuran of 1800 to 2300 cross-linked vinyl chloride resin (B) 10 parts by weight to 1 part by weight,
- the difference between the viscosity average polymerization degree of the polyvinyl chloride resin (A) and the viscosity average polymerization degree of the component dissolved in tetrahydrofuran of the crosslinked vinyl chloride resin (B) is 600 to 1850
- the cross-sectional shape of the fiber for artificial hair has a first protrusion, a second protrusion, and a third protrusion extending outward from the center C of the cross-sectional shape, and the
- the length L 1 of the first protrusion, the length L 2 of the second protrusion, and the length L 3 of the third protrusion are L 3 ⁇ L 2 , 0.8L 1 ⁇ L 2 ⁇ 0.95L 1 , and 0.8L 1 ⁇ L 3 ⁇ 0.95L 1 .
- An antistatic agent is contained in an amount of 0.01 to 1.0 part by mass with respect to a total of 100 parts by mass of the polyvinyl chloride resin (A) and the crosslinked vinyl chloride resin (B).
- the artificial hair fiber according to any one of [1] to [3], which contains 0 part by mass.
- a polyvinyl chloride-based artificial hair fiber that is excellent in low glossiness, has grip performance when braided, and can be stably spun.
- the fiber for artificial hair is formed using a polyvinyl chloride resin composition (hereinafter also simply referred to as “resin composition”) containing a polyvinyl chloride resin (A) and a crosslinked vinyl chloride resin (B). Fiber.
- resin composition a polyvinyl chloride resin composition
- A polyvinyl chloride resin
- B crosslinked vinyl chloride resin
- the polyvinyl chloride resin (A) is not particularly limited, and a conventionally known homopolymer resin that is a homopolymer of vinyl chloride or various conventionally known copolymer resins can be used.
- copolymer resins examples include vinyl chloride-vinyl acetate copolymer resins, vinyl chloride-vinyl propionate copolymer resins, and other vinyl chloride and vinyl ester resins; vinyl chloride-butyl acrylate copolymer resins, vinyl chloride-acrylic acid 2 Copolymer resins of vinyl chloride and acrylates such as ethylhexyl copolymer resin; copolymer resins of vinyl chloride and olefins such as vinyl chloride-ethylene copolymer resin, vinyl chloride-propylene copolymer resin; vinyl chloride-acrylonitrile copolymer resin, etc. Typically exemplified.
- Preferable polyvinyl chloride resins (A) include homopolymer resins that are homopolymers of vinyl chloride, vinyl chloride-ethylene copolymer resins, vinyl chloride-vinyl acetate copolymer resins, and the like.
- the content of the comonomer is not particularly limited, and can be determined according to the moldability of the fiber, the properties of the fiber, and the like.
- the viscosity average polymerization degree of the polyvinyl chloride resin (A) is in the range of 450 to 1700 in order to obtain sufficient strength and heat resistance as a fiber. If the viscosity average polymerization degree of the polyvinyl chloride resin (A) is less than 450, the resin is less entangled and the strength is weakened. On the other hand, if it exceeds 1700, gelation does not occur, the fibers are easily cut, and the productivity is lowered. When a polyvinyl chloride homopolymer resin is used, the viscosity average polymerization degree is preferably in the region of 650 to 1450 in order to achieve moldability and fiber characteristics.
- a copolymer When a copolymer is used, it preferably depends on the comonomer content, but preferably has a viscosity average degree of polymerization of 1000 to 1700.
- the viscosity average degree of polymerization was calculated according to JIS-K6721 by dissolving 200 mg of resin in 50 mL of nitrobenzene, measuring the specific viscosity of the polymer solution in a constant temperature bath at 30 ° C. using an Ubbelohde viscometer. .
- the content of the polyvinyl chloride resin (A) is 90 to 99 parts by mass with respect to 100 parts by mass in total of the polyvinyl chloride resin (A) and the crosslinked vinyl chloride resin (B) described later.
- the preferred range is 95 to 97 parts by mass. If it exceeds 99 parts by mass, the low glossiness and knitting property of the resulting fiber will be reduced, and if it is less than 90 parts by mass, the spinnability will be reduced.
- the content of the polyvinyl chloride resin (A) in the total resin composition is preferably 50% by mass or more, and more preferably 80% by mass or more from the viewpoint of spinnability.
- the polyvinyl chloride resin (A) can be produced by emulsion polymerization, bulk polymerization or suspension polymerization.
- a polymer produced by suspension polymerization is preferable in consideration of the initial colorability of the fiber.
- the cross-linked vinyl chloride resin (B) can be easily obtained by adding a polyfunctional monomer and polymerizing it in suspension polymerization, microsuspension polymerization or emulsion polymerization of vinyl chloride in an aqueous medium.
- the polyfunctional monomer used is particularly preferably a diacrylate compound such as polyethylene glycol diacrylate or bisphenol A-modified diacrylate.
- the cross-linked vinyl chloride resin (B) is a mixture of a gel component having a cross-linked structure and containing vinyl chloride insoluble in tetrahydrofuran as a main component and a polyvinyl chloride component soluble in tetrahydrofuran.
- the viscosity average polymerization degree of the component dissolved in tetrahydrofuran is 1800 to 2300, preferably 1900 to 2200 in consideration of the knitting property and spinnability of the yarn.
- the viscosity average polymerization degree of the component dissolved in tetrahydrofuran is less than 1800, the weaving property is not sufficient. Conversely, if it exceeds 2300, yarn breakage tends to occur during spinning.
- the viscosity average degree of polymerization of the component dissolved in tetrahydrofuran of the crosslinked vinyl chloride resin (B) is measured as follows. 1 g of the crosslinked vinyl chloride resin (B) is added to 60 mL of tetrahydrofuran and allowed to stand for about 24 hours. Thereafter, the resin is sufficiently dissolved using an ultrasonic cleaner. The insoluble matter in the tetrahydrofuran solution is separated using an ultracentrifuge (30,000 rpm ⁇ 1 hour), and the supernatant THF solvent is collected. Thereafter, the THF solvent is volatilized, and the viscosity average polymerization degree is measured by the same method as that for the polyvinyl chloride resin (A).
- the difference between the viscosity average polymerization degree of the polyvinyl chloride resin (A) and the polymerization degree of the component dissolved in tetrahydrofuran of the crosslinked vinyl chloride resin (B) is 600 to 1850 in order to obtain sufficient low gloss. Preferably, it is 800-1500. If it is less than 600, the low glossiness is not sufficient. Conversely, if it exceeds 1500, yarn breakage tends to occur during spinning.
- the content of the cross-linked vinyl chloride resin (B) is 10 parts by mass to 1 part by mass with respect to 90 parts by mass to 99 parts by mass of the polyvinyl chloride resin (A), and the polyvinyl chloride resin (A) It is preferable to add 5 to 3 parts by mass of the crosslinked vinyl chloride resin (B) with respect to 95 to 97 parts by mass.
- the amount of the crosslinked vinyl chloride resin (B) is less than 1 part by mass, the low glossiness and knitting property of the resulting fiber are deteriorated, and when it exceeds 10 parts by mass, the spinnability is unfavorably deteriorated.
- the resin composition can contain an antistatic agent, a heat stabilizer, and a lubricant as necessary.
- Antistatic agent nonionic (nonionic), cationic, anionic and amphoteric ones can be used, and the content thereof is preferably polyvinyl chloride resin (A) and crosslinked chloride.
- the amount is 0.01 parts by mass to 1 part by mass with respect to 100 parts by mass in total of the vinyl resin (B).
- Heat stabilizer A conventionally well-known thing can be used as a heat stabilizer. Among them, one or more selected from a Ca-Zn heat stabilizer, a hydrotalcite heat stabilizer, a tin heat stabilizer, a zeolite heat stabilizer, an epoxy heat stabilizer, and a ⁇ -diketone heat stabilizer It is desirable to use two or more.
- the thermal stabilizer is used to improve thermal decomposition during molding, long run property, and color tone of the filament, and is particularly preferably a Ca-Zn based thermal stabilizer that has an excellent balance of molding processability and yarn characteristics. The combined use of an agent and a hydrotalcite heat stabilizer is preferred.
- Examples of the Ca—Zn heat stabilizer include zinc stearate, calcium stearate, zinc 12-hydroxystearate, and calcium 12-hydroxystearate.
- Examples of the hydrotalcite-based heat stabilizer include Alkamizer manufactured by Kyowa Chemical Industry Co., Ltd.
- Examples of tin stabilizers include dimethyltin mercapto, dimethyltin mercaptoide, dibutyltin mercapto, dioctyltin mercapto, dioctyltin mercaptopolymer, mercaptotin thermal stabilizers such as dioctyltin mercaptoacetate, dimethyltin maleate, and dibutyltin maleate.
- Maleate tin thermal stabilizers such as dioctyl tin maleate and dioctyl tin maleate polymer, and laurate tin thermal stabilizers such as dimethyl tin laurate, dibutyl tin laurate and dioctyl tin laurate.
- Examples of the epoxy heat stabilizer include epoxidized soybean oil and epoxidized linseed oil.
- Examples of the ⁇ -diketone heat stabilizer include stearoylbenzoylmethane (SBM) and dibenzoylmethane (DBM).
- the hydrotalcite-based heat stabilizer is specifically a hydrotalcite compound, such as a complex salt compound composed of magnesium and / or alkali metal and aluminum or zinc, or a complex salt compound composed of magnesium and aluminum. . Further, water obtained by dehydrating crystal water may be used.
- the hydrotalcite compound may be a natural product or a synthetic product, and the synthetic method of the synthetic product may be a conventionally known method.
- the content of the heat stabilizer is preferably 0.1 to 5.0 parts by mass with respect to 100 parts by mass in total of the polyvinyl chloride resin (A) and the crosslinked vinyl chloride resin (B). .
- the content of the heat stabilizer is preferably 0.1 to 5.0 parts by mass with respect to 100 parts by mass in total of the polyvinyl chloride resin (A) and the crosslinked vinyl chloride resin (B). .
- it can prevent that a resin composition heat-degrades and yellows.
- it can be economically advantageous by setting it as 5.0 mass parts or less.
- lubricant As the lubricant, conventionally known ones can be used, and at least one selected from the group consisting of metal soap lubricants, polyethylene lubricants, higher fatty acid lubricants, ester lubricants and higher alcohol lubricants is particularly preferable. .
- the lubricant can reduce the friction with the metal surface of the processing machine and the friction between the resins, improve the fluidity, and improve the workability.
- metal soap lubricant examples include metal soaps such as stearates such as Na, Mg, Al, Ca and Ba, laurates, palmitates and oleates.
- higher fatty acid lubricant examples include saturated fatty acids such as stearic acid, palmitic acid, myristic acid, lauric acid and capric acid, unsaturated fatty acids such as oleic acid, and mixtures thereof.
- higher alcohol lubricants include stearyl alcohol, palmityl alcohol, myristyl alcohol, lauryl alcohol, oleyl alcohol, and the like.
- ester lubricants include ester lubricants composed of alcohol and fatty acids, pentaerythritol lubricants such as monoesters, diesters, triesters, tetraesters, or mixtures of pentaerythritol or dipentaerythritol and higher fatty acids, and montanic acid.
- ester lubricants include ester lubricants composed of alcohol and fatty acids, pentaerythritol lubricants such as monoesters, diesters, triesters, tetraesters, or mixtures of pentaerythritol or dipentaerythritol and higher fatty acids, and montanic acid.
- montanic acid wax-based lubricants of esters of stearyl alcohol, palmityl alcohol, myristyl alcohol, lauryl alcohol, oleyl alcohol, and other higher alcohols.
- the content of the lubricant is preferably 0.2 to 5.0 parts by mass with respect to 100 parts by mass in total of the polyvinyl chloride resin (A) and the crosslinked vinyl chloride resin (B).
- the content of the lubricant is preferably 0.2 to 5.0 parts by mass with respect to 100 parts by mass in total of the polyvinyl chloride resin (A) and the crosslinked vinyl chloride resin (B).
- compounding agents used for the polyvinyl chloride resin composition can be added as long as the effects of the present invention are not impaired.
- the compounding agents include processing aids, plasticizers, reinforcing agents, ultraviolet absorbers, antioxidants, fillers, flame retardants, pigments, initial color improvers, conductivity imparting agents, and fragrances.
- the fiber for artificial hair has a substantially uniform cross-sectional shape over the length direction.
- FIG. 1 sectional drawing orthogonal to the longitudinal direction of the fiber 10 for artificial hair is shown.
- the cross-sectional shape of the artificial hair fiber 10 has a first protrusion 1, a second protrusion 2, and a third protrusion 3 (hereinafter simply referred to as “ Protrusion 1 ”,“ protrusion 2 ”, and“ protrusion 3 ”).
- the protrusions 1 to 3 are spaced apart from each other, and the cross-sectional shape of the artificial hair fiber 10 is Y-shaped.
- the protrusions 1 to 3 may be arranged at equiangular intervals.
- the center C refers to the center of the maximum inscribed circle in the central portion of the cross-sectional shape of the artificial hair fiber 10.
- the shape of the first protrusion, the second protrusion, and the third protrusion is such that the length of the first protrusion from the center C is L 1 , the length of the second protrusion is L 2 , and the length of the third protrusion hereinafter length when the L 3 (2), satisfies the (3).
- W 1 (0.15) / W 1 (0.9) ) is 1.2 to 2.5.
- W 1 (0.15) / W 1 (0.9) When the ratio (W 1 (0.15) / W 1 (0.9) ) of the width W 1 (0.15) to the width W 1 (0.9) of the first protrusion is less than 1.2 When the yarns are gathered, gaps are easily formed, and since there is little contact between the yarns, the frictional force is lowered and the gripping property is deteriorated. Conversely, if it exceeds 2.5, the spinnability deteriorates. W 1 (0.15) / W 1 (0.9) is more preferably in the range of 1.5 to 2.3.
- Ratio (W 2 (0.15) / W 2 (0.9) ) of width W 2 (0.15) and width W 2 (0.9) of the second protrusion, and width of the third protrusion If the ratio of W 3 (0.15) to width W 3 (0.9) (W 3 (0.15) / W 3 (0.9) ) is less than 1.8, When they are put together, voids are easily formed, and since there is little contact between the yarns, the frictional force is reduced and the grip properties are deteriorated. Conversely, if it exceeds 2.5, the spinnability deteriorates. More preferably, W 2 (0.15) / W 2 (0.9) and / or W 3 (0.15) / W 3 (0.9) is in the range of 1.7 to 2.1. It is.
- the length L 1 of the first protrusion, the length L 2 of the second protrusion, and the length L 3 of the third protrusion may all be the same or different, but will be described later ( It is preferable to further satisfy 1).
- the length L 1 of the first protrusion, the length L 2 of the second protrusion, and the length L 3 of the third protrusion are preferably 50 ⁇ m to 90 ⁇ m from the viewpoint of spinnability.
- the lengths L 1 , L 2 , and L 3 of the first protrusion, the second protrusion, and the third protrusion are measured using the center of the maximum inscribed circle at the center of the Y-shaped cross section as the center C, From there, measure the positions of the apexes (projection ends) of the three projections at 10 points, and set the average value of them.
- the widths W 1 (0.15) , W 2 (0.15) , and W 3 (0.15) are 0.15 L 1 , 0.15 L 2 , 0 from the center C to the respective vertices, respectively. .15L 3 is the width of the protrusions 1 to 3 at the advanced point.
- the widths W 1 (0.9) , W 2 (0.9) , and W 3 (0.9) are 0.9L 1 , 0.9L 2 , 0. 9L 3 is the width of the advanced point.
- the length and width can be measured using, for example, a digital microscope, VHX-5000 manufactured by Keyence Corporation.
- the shapes of the first protrusion, the second protrusion, and the third protrusion preferably satisfy the following (1) to (3).
- the lengths L 1 , L 2 and L 3 from the center C are L 3 ⁇ L 2 , 0.8L 1 ⁇ L 2 ⁇ 0.95 L 1 , 0.8L 1 ⁇ L 3 ⁇ 0.95L 1 It is.
- W 1 (0.15) / W 1 (0.9) ) is 1.2 to 2.5.
- the lengths L 1 , L 2 and L 3 from the center C satisfy the relationship of L 3 ⁇ L 2 , 0.8L 1 ⁇ L 2 ⁇ 0.95L 1 , 0.8L 1 ⁇ L 3 ⁇ 0.95L 1 By satisfying all of them, the grip property can be further improved and the melt spinning can be performed more stably.
- the length L 1 of the first protrusion is preferably 50 ⁇ m to 90 ⁇ m from the viewpoint of spinnability.
- the artificial hair fiber is preferably produced by known melt spinning after all raw materials are mixed and once made into a pellet compound.
- the polyvinyl chloride resin (A) and the cross-linked vinyl chloride resin (B) are appropriately mixed with an antistatic agent, a heat stabilizer and a lubricant, and other compounding agents at a predetermined ratio, and a conventionally known mixer is used. After stirring and mixing, it is made into a pellet compound (pellet-shaped resin composition) with an extruder.
- a conventionally known mixer a powder compound (powdered resin composition) obtained by mixing using a Henschel mixer, a super mixer, a ribbon blender or the like is melt-mixed to obtain a pellet compound.
- the method for producing the powder compound may be hot blend or cold blend, and normal conditions can be used as production conditions.
- a hot blend in which the cut temperature during blending is increased to 105 ° C. to 155 ° C. may be used.
- the production of the pellet compound can be the same method as the production method of a normal vinyl chloride-based pellet compound.
- pellet compounding using a kneader such as a single screw extruder, a different direction twin screw extruder, a conical twin screw extruder, a same direction twin screw extruder, a kneader, a planetary gear extruder, or a roll kneader. It can be.
- the conditions for producing the pellet compound are not particularly limited, but it is preferable to set the resin temperature to be 185 ° C. or lower in order to prevent thermal deterioration of the polyvinyl chloride resin composition.
- a mesh can be installed near the tip of the screw to remove the metal pieces of the screw and the fibers attached to the protective gloves that can be mixed in the pellet compound.
- the cold cut method can be adopted for the production of pellets. It is possible to employ a means for removing swarf (fine powder generated at the time of pellet production) that can be mixed during cold cutting. In addition, if the cutter is used for a long time, the cutter spills and chips are likely to be generated.
- the pellets obtained as described above are extruded by using a nozzle with protrusions on three sides and extruding the resin under conditions of good spinnability at a cylinder temperature of 150 ° C to 190 ° C and a nozzle temperature of 180 ⁇ 15 ° C. Spin.
- the cross-sectional shape of the nozzle is set so that the cross-sectional shape of the resulting artificial hair fiber satisfies the conditions described below.
- the unstretched yarn (fibers of the polyvinyl chloride resin composition) melt-spun from the nozzle is introduced into a heated cylinder (heating cylinder temperature 250 ° C.) and instantaneously heat-treated, at a position of about 4.5 m immediately below the nozzle. It is wound up by the take-up machine installed in The strand remains an undrawn yarn. At the time of winding, the take-up speed is adjusted so that the fineness of the undrawn yarn is 175 to 185 denier.
- a conventionally well-known extruder can be used.
- a single-screw extruder, a different-direction twin-screw extruder, a conical twin-screw extruder, etc. can be used.
- Particularly preferred is a single-screw extruder having a diameter of about 35 to 85 mm or a conical extrusion having a diameter of about 35 to 50 mm ⁇ . It is better to use the machine. If the diameter is excessive, the amount of extrusion increases, the nozzle pressure becomes excessive, the temperature of the resin increases, and the resin tends to deteriorate.
- the undrawn yarn is drawn 3 times with a drawing machine (105 ° C. in an air atmosphere) and then heat-treated at 0.75 times using a heat treatment machine (110 ° C. under an air atmosphere) Heat shrink until it shrinks to 75% of the length) to a fineness of 58-62 denier to produce artificial hair fibers.
- the artificial hair fiber may be geared as necessary.
- Gear processing is a method of crimping by passing a fiber bundle between two meshing high-temperature gears, and the material of the gear used, the shape of the gear wave, the fraction of the gear, etc. are not particularly limited.
- the crimp wave shape can change depending on the fiber material, fineness, pressure condition between gears, etc., but in this embodiment, the crimp wave shape is controlled by the gear wave groove depth, gear surface temperature, and processing speed. it can.
- processing conditions are not particularly limited, but preferably the depth of the groove of the gear corrugation is 0.2 mm to 6 mm, more preferably 0.5 mm to 5 mm, and the gear surface temperature is 30 to 100 ° C., more preferably The processing speed is 40 to 80 ° C., and the processing speed is 0.5 to 10 m / min, more preferably 1.0 to 8.0 m / min.
- the total fineness of the fiber bundle during gear processing is not particularly limited, but is 100,000 to 2 million dtex, more preferably 500,000 to 1.5 million dtex. If the total fineness of the fiber bundle is less than 100,000 decitex, the productivity of gear processing is deteriorated, and further thread breakage may occur during gear-crimping. On the other hand, if the total fineness of the fiber bundle exceeds 2 million dtex, it may be difficult to obtain a uniform wave shape.
- the polyvinyl chloride artificial hair fiber of the present embodiment obtained as described above has the characteristics of low gloss, high grip when knitting, and good spinnability.
- the reason why low gloss was imparted even with the Y-shaped cross-sectional shape was that the amount of the cross-linked vinyl chloride resin (B) was appropriately adjusted, the viscosity average polymerization degree of the polyvinyl chloride resin (A) and the cross-linked vinyl chloride resin This is because the difference in viscosity average degree of polymerization of the component (B) dissolved in tetrahydrofuran was controlled.
- the reason why the grip property at the time of weaving could be imparted is that the amount of the component of the crosslinked vinyl chloride resin (B) having a high viscosity average polymerization degree that is dissolved in tetrahydrofuran was blended in an appropriate amount, and the shape of the projections on three sides was controlled. It is. Finally, the reason why the spinnability is good is that the blending amount of the cross-linked vinyl chloride resin (B) is made appropriate and the sizes of the three-side protrusions are controlled.
- A-1 Vinyl chloride homopolymer, viscosity average polymerization degree 500 (manufactured by Taiyo PVC Co., Ltd., TH-500)
- A-2 Vinyl chloride homopolymer, viscosity average polymerization degree 1100 (manufactured by Taiyo PVC Co., Ltd., TH-1000)
- A-3 Vinyl chloride homopolymer, viscosity average polymerization degree 1350 (manufactured by Taiyo PVC Co., Ltd., TH-1400)
- A-4 Vinyl chloride homopolymer, viscosity average polymerization degree 2000 (manufactured by Taiyo PVC Co., Ltd., TH-2800)
- the viscosity average degree of polymerization was calculated according to JIS-K6721 by dissolving 200 mg of resin in 50 mL of nitrobenzene, measuring the specific viscosity of this polymer solution in a thermostatic bath at 30 ° C. using an Ubbelohde viscometer.
- the viscosity average polymerization degree of the tetrahydrofuran (THF) soluble component was measured as follows. 1 g of resin was added to 60 mL of tetrahydrofuran and allowed to stand for about 24 hours. Thereafter, the resin was sufficiently dissolved using an ultrasonic cleaner. The insoluble matter in the THF solution was separated using an ultracentrifuge (30,000 rpm ⁇ 1 hour), and the supernatant THF solvent was collected. Thereafter, the THF solvent was volatilized, and the viscosity average polymerization degree was measured by the same method as that for the polyvinyl chloride resin (A).
- Example 1 90 parts by mass of polyvinyl chloride resin (A-1) (manufactured by Taiyo PVC Co., Ltd., TH-500), 10 parts by mass of crosslinked vinyl chloride resin (B-2) (manufactured by Shin-Etsu Chemical Co., Ltd., GR-2500S), 0.5 parts by mass of an antistatic agent (manufactured by NOF Corporation, New Elegan ASK), 3 parts by mass of a hydrotalcite composite heat stabilizer (manufactured by Nissan Chemical Industries, Ltd., CP-410A), epoxidized soybean oil (Asahi) Denki Kogyo Co., Ltd.
- the pellet has holes with projections on three sides, and a nozzle with 120 holes, a cylinder temperature of 140 ° C. to 190 ° C., a nozzle temperature of 180 ⁇ 15 ° C., and an extrusion rate of 10 kg / hour and a diameter of 30 mm. And melt spinning.
- the cross-sectional shape of the obtained fiber for artificial hair was measured by the above measurement method using a digital microscope, VHX-500, manufactured by Keyence Corporation.
- the length L 2 of the portion and the length L 3 of the third protrusion are L 1 : 78 ⁇ m, L 2 : 70 ⁇ m (0.9 ⁇ L 1 ), and L 3 : 70 ⁇ m (0.9L 1 ), respectively.
- Example 1 is the same as Example 1 except that the length L 1 of the first protrusion, the length L 2 of the second protrusion, and the length L 3 of the third protrusion are all 78 ⁇ m or 75 ⁇ m. 20, 21 fibers for artificial hair were obtained.
- Thread breakage is 10 to 15 times / 1 hour 2: Thread breakage is 7 to 9 times / 1 hour 3: Thread breakage is 4 to 6 times / 1 hour 4: Thread breakage is 2 to 3 times / 1 hour 5: Thread breakage is less than once / hour
- the polyvinyl chloride resin (A) is more than 99 parts by mass and the cross-linked vinyl chloride resin (B) is less than 1 part by mass.
- the grip performance was greatly reduced.
- the amount of the polyvinyl chloride resin (A) is less than 90 parts by mass and the amount of the cross-linked vinyl chloride resin (B) is more than 10 parts by mass, so that the incompatible component is increased and the spinnability is greatly reduced. .
- Comparative Example 3 is a case where the viscosity average polymerization degree of the component dissolved in tetrahydrofuran of the crosslinked vinyl chloride resin (B) is less than 1800, and the unevenness on the surface of the yarn is reduced, so that the low glossiness and grip properties are deteriorated. did.
- Comparative Example 4 the difference in viscosity average polymerization degree between the components of the polyvinyl chloride resin (A) and the cross-linked vinyl chloride resin (B) dissolved in tetrahydrofuran was 20, which was smaller than 600, so that the low glossiness was lowered.
- Comparative Example 5 the projection length of the second protrusion L 2 is shorter than 0.8 L 1, spinnability, grip is deteriorated.
- the fiber has low glossiness and can impart grip. Moreover, since the fiber of the present invention can be stably produced by melt spinning, it is industrially advantageous.
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Abstract
Description
[1]ポリ塩化ビニル系樹脂組成物を含有する人工毛髪用繊維であって、
前記ポリ塩化ビニル系樹脂組成物が、粘度平均重合度が450~1700であるポリ塩化ビニル系樹脂(A)90質量部~99質量部と、テトラヒドロフランに溶解する成分の粘度平均重合度が1800~2300である架橋塩化ビニル系樹脂(B)10質量部~1質量部とを含み、
前記ポリ塩化ビニル系樹脂(A)の粘度平均重合度と、前記架橋塩化ビニル系樹脂(B)のテトラヒドロフランに溶解する成分の粘度平均重合度との差が、600~1850であり、
前記人工毛髪用繊維の断面形状が、該断面形状の中心Cから外方へ延びる第1突起部、第2突起部、及び第3突起部を有し、前記各突起部の形状が、前記中心Cからの前記第1突起部の長さをL1、前記第2突起部の長さをL2、及び前記第3突起部の長さをL3とした場合に以下の(2),(3)を満たす、人工毛髪用繊維。
(2)前記中心Cから0.15L1の距離における前記第1突起部の幅W1(0.15)と、前記中心Cから0.9L1の距離における前記第1突起部の幅W1(0.9)との比(W1(0.15)/W1(0.9))が、1.2~2.5である。
(3)前記中心Cから0.15L2の距離における前記第2突起部の幅W2(0.15)と、前記中心Cから0.9L2の距離における前記第2突起部の幅W2(0.9)との比(W2(0.15)/W2(0.9))、及び、前記中心Cから0.15L3の距離における前記第3突起部の幅W3(0.15)と、前記中心Cから0.9L3の距離における前記第3突起部の幅W3(0.9)との比(W3(0.15)/W3(0.9))の、少なくとも一方が、1.8~2.5である。
[2]さらに以下の(1)を満たす、[1]に記載の人工毛髪用繊維。
(1)前記中心Cからの、前記第1突起部の長さL1、前記第2突起部の長さL2、及び前記第3突起部の長さL3が、L3≦L2、0.8L1≦L2≦0.95L1、及び、0.8L1≦L3≦0.95L1である。
[3]帯電防止剤を、前記ポリ塩化ビニル系樹脂(A)及び前記架橋塩化ビニル系樹脂(B)の総計100質量部に対して、0.01質量部~1.0質量部含有する、[1]又は[2]に記載の人工毛髪用繊維
[4]錫系熱安定剤、Ca-Zn系熱安定剤、ハイドロタルサイト系熱安定剤、エポキシ系熱安定剤及びβ-ジケトン系熱安定剤から選択される少なくとも一種の熱安定剤を、前記ポリ塩化ビニル系樹脂(A)及び前記架橋塩化ビニル系樹脂(B)の総計100質量部に対して、0.1質量部~5.0質量部含有する、[1]から[3]のいずれかに記載の人工毛髪用繊維。
人工毛髪用繊維は、ポリ塩化ビニル系樹脂(A)及び架橋塩化ビニル系樹脂(B)を含有するポリ塩化ビニル系樹脂組成物(以下、単に「樹脂組成物」ともいう。)を用いて形成された繊維である。
ポリ塩化ビニル系樹脂(A)は、特に限定されず、従来公知の塩化ビニルの単独重合物であるホモポリマー樹脂、または従来公知の各種のコポリマー樹脂を用いることができる。該コポリマー樹脂としては、塩化ビニル-酢酸ビニルコポリマー樹脂、塩化ビニル-プロピオン酸ビニルコポリマー樹脂などの塩化ビニルとビニルエステル類とのコポリマー樹脂;塩化ビニル-アクリル酸ブチルコポリマー樹脂、塩化ビニル-アクリル酸2エチルヘキシルコポリマー樹脂などの塩化ビニルとアクリル酸エステル類とのコポリマー樹脂;塩化ビニル-エチレンコポリマー樹脂、塩化ビニル-プロピレンコポリマー樹脂などの塩化ビニルとオレフィン類とのコポリマー樹脂;塩化ビニル-アクリロニトリルコポリマー樹脂などが代表的に例示される。好ましいポリ塩化ビニル系樹脂(A)は、塩化ビニルの単独重合物であるホモポリマー樹脂、塩化ビニル-エチレンコポリマー樹脂、塩化ビニル-酢酸ビニルコポリマー樹脂などが挙げられる。該コポリマー樹脂において、コモノマーの含有量は特に限定されず、繊維への成型加工性、繊維の特性などに応じて決めることができる。
また、ポリ塩化ビニル系樹脂(A)の全樹脂組成物中の含有量は、紡糸性の点で、50質量%以上であることが好ましく、80質量%以上であることがより好ましい。
架橋塩化ビニル系樹脂(B)は、水性媒体中で塩化ビニルを懸濁重合、ミクロ懸濁重合あるいは乳化重合する際に多官能性モノマーを添加して重合することにより容易に得られる。この際、使用される多官能性モノマーとしては、ポリエチレングリコールジアクリレート、ビスフェノールA変性ジアクリレートなどのジアクリレート化合物が特に好ましい。架橋塩化ビニル系樹脂(B)は、架橋構造を有し、テトラヒドロフランに不溶な塩化ビニルを主成分とするゲル分とテトラヒドロフランに可溶なポリ塩化ビニル成分との混合物である。
樹脂組成物は、必要に応じて、帯電防止剤、熱安定剤、滑剤を含有することができる。
(帯電防止剤)
帯電防止剤としては、非イオン性(ノニオン系)、カチオン系、アニオン系、両性系のものを使用することができ、その含有量は、好ましくは、ポリ塩化ビニル系樹脂(A)及び架橋塩化ビニル系樹脂(B)の総計100質量部に対して、0.01質量部~1質量部である。0.01質量部以上とすることで、静電気の発生を防ぐことができる。その結果、静電気の発生により生じ易くなる、糸が纏まり難くなり、巻き取られる過程で絡まりやすくなって糸切れが発生するという問題を防ぐことができる。また、帯電防止剤の含有量を1質量部以下にすることで、経済的に有利にすることができる。
熱安定剤としては、従来公知のものが使用できる。中でも、Ca-Zn系熱安定剤、ハイドロタルサイト系熱安定剤、錫系熱安定剤、ゼオライト系熱安定剤、エポキシ系熱安定剤及びβ-ジケトン系熱安定剤から選択される1種又は2種以上を使用するのが望ましい。熱安定剤は、成形時の熱分解、ロングラン性、フィラメントの色調を改良するために使用するもので、特に好ましくは、成形加工性、糸特性のバランスが優れている、Ca-Zn系熱安定剤とハイドロタルサイト系熱安定剤との併用が好ましい。
滑剤としては、従来公知のものを用いることができるが、特に金属石鹸系滑剤、ポリエチレン系滑剤、高級脂肪酸系滑剤、エステル系滑剤、高級アルコール系滑剤からなる群から選択される少なくとも1種が好ましい。滑剤は、加工機の金属面との摩擦や樹脂間の摩擦を減少させ、流動性を良くし、加工性を改良させることが出来る。
人工毛髪用繊維は、長さ方向にわたってほぼ一様な断面形状を有していることが好ましい。図1に、人工毛髪用繊維10の長手方向に直角な断面図を示す。図1に示すように、人工毛髪用繊維10の断面形状は、該断面形状の中心Cから外方へ延びる第1突起部1、第2突起部2及び第3突起部3(以下、単に「突起部1」、「突起部2」、「突起部3」ともいう。)を有している。突起部1~3は、互いに間隔をおいて配置されており、これにより、人工毛髪用繊維10の断面形状はY字状となっている。突起部1~3は、それぞれ等角間隔をおいて配置されていてもよい。なお、中心Cは、人工毛髪用繊維10の断面形状の中心部分における最大の内接円の中心をいう。
(2)中心Cから0.15L1の距離における第1突起部の幅W1(0.15)と、中心Cから0.9L1の距離における第1突起部の幅W1(0.9)との比(W1(0.15)/W1(0.9))が、1.2~2.5である。
(3)中心Cから0.15L2の距離における第2突起部の幅W2(0.15)と、中心Cから0.9L2の距離における第2突起部の幅W2(0.9)との比(W2(0.15)/W2(0.9))、又は、
中心Cから0.15L3の距離における第3突起部の幅W3(0.15)と、中心Cから0.9L3の距離における第3突起部の幅W3(0.9)との比(W3(0.15)/W3(0.9))の、
少なくとも一方が、1.8~2.5である。
(1)中心Cからの長さL1、L2及びL3が、L3≦L2、0.8L1≦L2≦0.95L1、0.8L1≦L3≦0.95L1である。
(2)中心Cから0.15L1の距離における第1突起部の幅W1(0.15)と、中心Cから0.9L1の距離における第1突起部の幅W1(0.9)との比(W1(0.15)/W1(0.9))が、1.2~2.5である。
(3)中心Cから0.15L2の距離における第2突起部の幅W2(0.15)と、中心Cから0.9L2の距離における第2突起部の幅W2(0.9)との比(W2(0.15)/W2(0.9))、又は、
中心Cから0.15L3の距離における第3突起部の幅W3(0.15)と、中心Cから0.9L3の距離における第3突起部の幅W3(0.9)との比(W3(0.15)/W3(0.9))の、
少なくとも一方が、1.8~2.5である。
人工毛髪用繊維は、好ましくは全ての原料を混ぜ、一度ペレットコンパウンドにしてから公知の溶融紡糸により製造される。
ポリ塩化ビニル系樹脂(A)、架橋塩化ビニル系樹脂(B)に、適宜、帯電防止剤、熱安定剤及び滑剤、並びに他の配合剤を所定の割合で混合し、従来公知の混合機で攪拌混合した後、押出機でペレットコンパウンド(ペレット状の樹脂組成物)にする。例えば、従来公知の混合機として、ヘンシェルミキサー、スーパーミキサー、リボンブレンダーなどを使用して混合して得られるパウダーコンパウンド(粉状の樹脂組成物)を溶融混合してペレットコンパウンドを得る。
上記のようにして得られたペレットを、三方に突起のあるノズルを用いて、シリンダー温度150℃~190℃、ノズル温度180±15℃の範囲で、紡糸性の良い条件で樹脂を押出し、溶融紡糸する。ノズルの断面形状は、得られる人工毛髪用繊維の断面形状が、後述する条件を満たすように設定される。
次に、該未延伸糸を延伸機(空気雰囲気下105℃)で3倍に延伸後、熱処理機(空気雰囲気下110℃)を用いて0.75倍で熱処理を施し(繊維全長が処理前の75%の長さに収縮するまで熱収縮させて)、繊度が58~62デニールになるようにし、人工毛髪用繊維を作製する。
人工毛髪用繊維は、必要に応じて、ギア加工されていてもよい。ギア加工とは、2つの噛み合う高温のギアの間に繊維束を通すことによって捲縮を施す方法であり、使用するギアの材質、ギアの波の形、ギアの端数などは特に限定されない。繊維材質、繊度、ギア間の圧力条件等によってクリンプの波形状は変化しうるが、本実施形態においては、ギア波形の溝の深さ、ギアの表面温度、加工速度によってクリンプの波形状をコントロールできる。これらの加工条件に特に制限はないが、好ましくは、ギア波形の溝の深さは0.2mm~6mm、より好ましくは0.5mm~5mm、ギアの表面温度は30~100℃、より好ましくは40~80℃、加工速度は0.5~10m/分、より好ましくは1.0~8.0m/分である。
上記のようにして得られる本実施形態のポリ塩化ビニル系人工毛髪用繊維は、低光沢で、編み込み時のグリップ性が高い特性があり、紡糸性も良好に製造することが可能である。Y型の断面形状でも低光沢性を付与できた理由は、架橋塩化ビニル系樹脂(B)の配合量を適切にし、ポリ塩化ビニル系樹脂(A)の粘度平均重合度と架橋塩化ビニル系樹脂(B)のテトラヒドロフランに溶解する成分の粘度平均重合度の差をコントロールしたためである。また、編み込み時のグリップ性が付与できた理由は、架橋塩化ビニル系樹脂(B)のテトラヒドロフランに溶解する成分の粘度平均重合度が高いものを適切量配合し、三方の突起の形状を制御したためである。最後に、紡糸性が良好な理由は、架橋塩化ビニル系樹脂(B)の配合量を適切にし、三方の突起の大きさを制御したためである。
(ポリ塩化ビニル系樹脂(A))
A-1:塩化ビニルの単独重合物、粘度平均重合度500(大洋塩ビ株式会社製、TH-500)
A-2:塩化ビニルの単独重合物、粘度平均重合度1100(大洋塩ビ株式会社製、TH-1000)
A-3:塩化ビニルの単独重合物、粘度平均重合度1350(大洋塩ビ株式会社製、TH-1400)
A-4:塩化ビニルの単独重合物、粘度平均重合度2000(大洋塩ビ株式会社製、TH-2800)
B-1:部分架橋塩化ビニル樹脂、THF可溶分粘度平均重合度1600(信越化学株式会社製、GR-1300T)
B-2:部分架橋塩化ビニル樹脂、THF可溶分粘度平均重合度2020(信越化学株式会社製、GR-2500S)
B-3:部分架橋塩化ビニル樹脂、THF可溶分粘度平均重合度2280(カネカ株式会社製、K25S)
ポリ塩化ビニル系樹脂(A-1)(大洋塩ビ株式会社製、TH-500)90質量部、架橋塩化ビニル系樹脂(B-2)(信越化学株式会社製、GR-2500S)10質量部、帯電防止剤(日油株式会社製、ニューエレガンASK)0.5質量部、ハイドロタルサイト系複合熱安定剤(日産化学工業株式会社製、CP-410A)3質量部、エポキシ化大豆油(旭電化工業株式会社O-130P)0.5質量部、エステル系滑剤(理研ビタミン社製EW-100)0.8質量部を配合したポリ塩化ビニル系樹脂組成物をリボンブレンダーで混合し、シリンダー温度130℃~170℃の範囲において、直径40mmの押出機を使用し、溶融混練を行い、ペレットを作製した。
ポリ塩化ビニル系樹脂組成物の配合、及び溶融紡糸して得られる繊維の断面形状を、表1~3に示すように変更した以外は、実施例1と同様にして、実施例2~19、比較例1~10の人工毛髪用繊維を得た。
第1突起部の長さL1、第2突起部の長さL2、及び第3突起部の長さL3をすべて78μm又は75μmにした以外は、実施例1と同様にして、実施例20,21の人工毛髪用繊維を得た。
実施例及び比較例の人工毛髪用繊維について、以下の評価方法及び基準に従って、紡糸性、低光沢性、編み込み時のグリップ性についての評価を行った。結果を表1~4に示した。
溶融紡糸し、未延伸糸ができる間で、糸切れの発生状況を目視観察し、次のように5段階評価した。
1:糸切れが10~15回/1時間
2:糸切れが7~9回/1時間
3:糸切れが4~6回/1時間
4:糸切れが2~3回/1時間
5:糸切れが1回以下/1時間
繊維の毛束を観察し、次のように5段階評価した。低光沢性の判定の際、デンカ社製の塩化ビニル系繊維M-TYPEをランク1(光沢が非常にある)とした。
1:光沢が非常にある。
2:光沢がある。
3:光沢が僅かにある
4:艶が消えている。
5:非常に艶が消えている。
実施例及び比較例の人工毛髪用繊維にギア加工を施した30cm×0.5gの繊維の毛束を3セット作製し、それら上部2cmを固定し、三つ網加工後の長さが20~25cmの範囲になるように編み込み、5段階評価を行なった。この際、デンカ社製の塩化ビニル系繊維M-TYPEをランク1(非常に滑る)とした。
1:非常に滑る。
2:滑る。
3:僅かに滑る。
4:滑らない。
5:非常に滑らない。
比較例2は、ポリ塩化ビニル系樹脂(A)が90質量部より少なく、架橋塩化ビニル系樹脂(B)が10質量部より多いため、非相溶成分が大きくなり、紡糸性が大きく低下した。
比較例3は、架橋塩化ビニル系樹脂(B)のテトラヒドロフランに溶解する成分の粘度平均重合度が1800未満の場合であり、糸の表面の凹凸が少なくなるため、低光沢性、グリップ性が悪化した。
比較例4は、ポリ塩化ビニル系樹脂(A)と架橋塩化ビニル系樹脂(B)のテトラヒドロフランに溶解する成分の粘度平均重合度の差が20となり、600より小さいため低光沢性が低下した。
比較例5は、第2突起部の突起長さL2が0.8L1より短いため、紡糸性、グリップ性が悪化した。
比較例6は、第1突起部の断面中心側と突起端側との幅の比W1(0.15)/W1(0.9)が1.2より小さいためグリップ性が低下した。
比較例7は、第1突起部の断面中心側と突起端側との幅の比W1(0.15)/W1(0.9)が2.5より大きいため紡糸性が著しく悪化した。
比較例8は、第2突起部の断面中心側と突起端側との幅の比W2(0.15)/W2(0.9)、及び第3突起部の断面中心側と突起端側との幅の比W3(0.15)/W3(0.9)のいずれも1.8よりも小さいため、糸同士の摩擦が低下し、グリップ性が悪化した。
比較例9は、W2(0.15)/W2(0.9)、及びW3(0.15)/W3(0.9)のいずれも2.5より大きいため、紡糸時にノズル孔からポリ塩化ビニル系樹脂組成物が安定的に出ず、紡糸性が悪化した。
比較例10は、丸型の形状のためグリップ性が悪化した。
2 第2突起部
3 第3突起部
10 人工毛髪用繊維
C 断面形状の中心
Claims (4)
- ポリ塩化ビニル系樹脂組成物を用いた人工毛髪用繊維であって、
前記ポリ塩化ビニル系樹脂組成物が、粘度平均重合度が450~1700であるポリ塩化ビニル系樹脂(A)90質量部~99質量部と、テトラヒドロフランに溶解する成分の粘度平均重合度が1800~2300である架橋塩化ビニル系樹脂(B)10質量部~1質量部とを含み、
前記ポリ塩化ビニル系樹脂(A)の粘度平均重合度と、前記架橋塩化ビニル系樹脂(B)のテトラヒドロフランに溶解する成分の粘度平均重合度との差が、600~1850であり、
前記人工毛髪用繊維の断面形状が、該断面形状の中心Cから外方へ延びる第1突起部、第2突起部、及び第3突起部を有し、前記各突起部の形状が、前記中心Cからの前記第1突起部の長さをL1、前記第2突起部の長さをL2、及び前記第3突起部の長さをL3とした場合に以下の(2),(3)を満たす、人工毛髪用繊維。
(2)前記中心Cから0.15L1の距離における前記第1突起部の幅W1(0.15)と、前記中心Cから0.9L1の距離における前記第1突起部の幅W1(0.9)との比(W1(0.15)/W1(0.9))が、1.2~2.5である。
(3)前記中心Cから0.15L2の距離における前記第2突起部の幅W2(0.15)と、前記中心Cから0.9L2の距離における前記第2突起部の幅W2(0.9)との比(W2(0.15)/W2(0.9))、及び、前記中心Cから0.15L3の距離における前記第3突起部の幅W3(0.15)と、前記中心Cから0.9L3の距離における前記第3突起部の幅W3(0.9)との比(W3(0.15)/W3(0.9))の、少なくとも一方が、1.8~2.5である。 - さらに以下の(1)を満たす、請求項1に記載の人工毛髪用繊維。
(1)前記中心Cからの、前記第1突起部の長さL1、前記第2突起部の長さL2、及び前記第3突起部の長さL3が、L3≦L2、0.8L1≦L2≦0.95L1、及び、0.8L1≦L3≦0.95L1である。 - 帯電防止剤を、前記ポリ塩化ビニル系樹脂(A)及び前記架橋塩化ビニル系樹脂(B)の総計100質量部に対して、0.01質量部~1.0質量部含有する、請求項1又は2に記載の人工毛髪用繊維。
- 錫系熱安定剤、Ca-Zn系熱安定剤、ハイドロタルサイト系熱安定剤、エポキシ系熱安定剤及びβ-ジケトン系熱安定剤から選択される少なくとも一種の熱安定剤を、前記ポリ塩化ビニル系樹脂(A)及び前記架橋塩化ビニル系樹脂(B)の総計100質量部に対して、0.1質量部~5.0質量部含有する、請求項1から3のいずれか一項に記載の人工毛髪用繊維。
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