US20130298924A1 - Fiber for artificial hair, and hair accessory formed from same - Google Patents

Fiber for artificial hair, and hair accessory formed from same Download PDF

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Publication number
US20130298924A1
US20130298924A1 US13/878,115 US201113878115A US2013298924A1 US 20130298924 A1 US20130298924 A1 US 20130298924A1 US 201113878115 A US201113878115 A US 201113878115A US 2013298924 A1 US2013298924 A1 US 2013298924A1
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Prior art keywords
fiber
based resin
polyvinyl chloride
resin
artificial hair
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US13/878,115
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Inventor
Tomomichi Hashimoto
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Kaneka Corp
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Kaneka Corp
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Publication of US20130298924A1 publication Critical patent/US20130298924A1/en
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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
    • A41G5/00—Hair pieces, inserts, rolls, pads, or the like; Toupées
    • A41G5/004—Hair pieces
    • 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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
    • A41G3/00—Wigs
    • A41G3/0083—Filaments for making wigs
    • 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
    • D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D01F6/32—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising halogenated hydrocarbons as the major constituent
    • 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
    • D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04D—TRIMMINGS; RIBBONS, TAPES OR BANDS, NOT OTHERWISE PROVIDED FOR
    • D04D7/00—Decorative or ornamental textile articles
    • 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 and a fiber bundle for artificial hair having an excellent styling property and a soft and smooth texture similar to those of human hair; a hair accessory and an artificial hair product formed therefrom; and a polyvinyl chloride-based resin fiber forming the fiber for artificial hair and the fiber bundle for artificial hair.
  • polyvinyl chloride-based resin fibers As a synthetic fiber for artificial hair which is commercially available, there are many materials such as polyvinyl chloride-based resin fibers, polyester-based resin fibers, and modacrylic resin fibers. These synthetic fibers each have superior properties derived from the material, and they have been used in a headdress product in a field in which they excel depending on the properties of each fiber. Recently, combined fibers are used to fabricate one headdress product, harmonizing and utilizing various excellent properties. The resulting commodities, which consequently have value relatively similar to those of human hair products, have been placed on the market. They show the following properties. For example, the polyvinyl chloride-based resin fiber has soft texture similar to that of human hair, can be easily processed into any style, and rarely gets tangled.
  • the polyester-based resin fiber has strong resilience, resulting in good feel of elasticity when a commodity is worn and moved, and has good use durability because of its high morphological stability.
  • the modacrylic resin fiber is light and has high voluminousness, and can impart a natural style utilizing roughness on its surface.
  • fibers formed from different materials are combined to be used, it is difficult to fully utilize the properties of each fiber, and thus so far the commercial value, which is comparable with that of human hair products, cannot be obtained in headdress products made of synthetic fibers.
  • the polyvinyl chloride-based resin has a low heat-resistance, and the quality is remarkably reduced with increase of a temperature, and thus a temperature at which a curl shape is imparted is limited to 80 to 90° C.
  • a temperature at which a curl shape is imparted is limited to 80 to 90° C.
  • a high heat-resistant fiber such as a polyester-based resin fiber
  • curls are imparted at a processing temperature lower than an optimum temperature of the polyester-based resin fiber, and thus strong curls, which are originally imparted from the polyester-based resin fiber, cannot be utilized.
  • original improvement effects of texture by the fiber-treating agent cannot be sufficiently exhibited.
  • the polyvinyl chloride-based resin fiber has very outstanding properties as a fiber for hair in soft and smooth texture similar to that of human hair, styling property of a curl shape, and a cost performance, and thus it is difficult to ignore the fiber in this field, and the conventional technique cannot reach a fully satisfactory level in an overall quality.
  • Patent Documents 1 and 2 describe examples in which a polyester-based resin fiber and a halogen-containing resin fiber, or a modacrylic resin fiber, and a polyvinyl chloride-based resin fiber are mixed, and curls are imparted by heating them at a temperature of 100° C. or higher. These techniques succeed at exhibition of the quality as a commodity superior to conventional produces by mixing different materials and utilizing the properties. However, because the properties of the polyvinyl chloride-based resin fiber are not sufficiently utilized, there are rooms to improve the texture, and the resulting products do not reach a level in which the quality as a commodity comparative with human hair products is imparted.
  • Patent Document 3 describes a method for calculating conditions to impart curls, but an effect of suppressing occurrence of fiber bending is insufficient only by simply decreasing a shrinkage percentage and the texture is not considered, for example, the fiber becomes hard in high-temperature conditions, and thus sufficient qualities cannot be obtained as a commodity for hair.
  • Patent Document 4 describes examples in which a chlorinated polyvinyl chloride resin having a high chlorine content is admixed in order to improve a heat-resistance of a polyvinyl chloride-based resin fiber, but sufficient texture as a commodity for hair cannot be obtained only by decreasing a shrinkage percentage.
  • the present invention aims at providing a fiber for artificial hair and an artificial hair product having an excellent styling property, and soft and smooth texture similar to that of human hair.
  • the present inventors have repeated painstaking studies. As a result, they have found when the polyvinyl chloride-based resin fiber is improved to reduce a shrinkage stress, mixed with a fiber having an excellent heat-resistance and an excellent rigidity as needed, and processed at a selected temperature at which a curl shape is imparted and shrinkage percentage and with a selected fiber-treating agent, then headdress products in which the above-mentioned problems are solved can be produced, and have achieved the present invention. Principles of the present invention will be explained below.
  • the fiber When the polyvinyl chloride-based resin fiber is processed at a temperature higher than a glass transition temperature of 90° C., the fiber is bent due to shrinkage, thus resulting in a bad texture of rough feel, because, as described above, the polyvinyl chloride-based resin, its main component, has a low softening temperature.
  • the bending of this fiber occurs by the following principle. First, in a step in which a curl shape is imparted, fiber bundles are wound spirally or concentrically around a cylindrical pipe, the resulting pipe is heated for a pre-determined time while that shape is maintained, whereby the fiber bundles memorize the wound shape, and then the fiber bundles are taken out from the pipe after cooling it to finish the step.
  • the polyvinyl chloride-based resin fiber easily cause a fiber bending with an angle of less than 170° to other fibers such as a modacrylic resin fiber or a polyester-based resin fiber, and furthermore softness is lost due to fusion between the fibers and thus the degree of deterioration of the texture is extremely large.
  • the effect of increasing the temperature at which the curl shape is imparted influences on the texture by a fiber-treating agent, and the compatibility with the fiber-treating agent on the fiber surface is improved by heating at a high temperature.
  • the present invention has the following gist.
  • One of characteristics of the present invention is a polyvinyl chloride-based resin fiber which has a shrinkage stress of 70 ⁇ N/dtex or less at 130° C.
  • Another characteristic of the present invention is a polyvinyl chloride-based resin fiber for artificial hair which has a shrinkage stress of 70 ⁇ N/dtex or less at 130° C.
  • Another characteristic of the present invention is a fiber bundle for artificial hair including 20 to 100% by weight of a polyvinyl chloride-based resin fiber having a shrinkage stress of 70 ⁇ N/dtex or less at 130° C. and 0 to 80% by weight of a thermoplastic resin fiber having a composition including no polyvinyl chloride-based resin.
  • Another characteristic of the present invention is a fiber bundle for artificial hair including 20 to 100% by weight of a polyvinyl chloride-based resin fiber having a shrinkage stress of 70 ⁇ N/dtex or less at 130° C. and 0 to 80% by weight of a thermoplastic resin fiber having a Young's modulus of 4 to 9 GPa, a shrinkage percentage of 10% or less at 130° C., and a composition including no polyvinyl chloride-based resin.
  • Another characteristic of the present invention is a fiber bundle for artificial hair wherein the polyvinyl chloride-based resin fiber has a shrinkage percentage at 130° C. which is not lower than a shrinkage percentage of the thermoplastic resin fiber at 130° C., and a difference between the shrinkage percentage at 130° C. of the polyvinyl chloride-based resin fiber and the shrinkage percentage at 130° C. of the thermoplastic resin fiber is 6% or less.
  • Another characteristic of the present invention is a fiber bundle for artificial hair wherein the polyvinyl chloride-based resin fiber and the thermoplastic resin fiber includes an amino-modified silicone compound.
  • polyvinyl chloride-based resin fiber includes a polyalkylene oxide-based compound having a weight average molecular weight of 2000 to 25000 in a content of 0.07 to 0.5 omf %.
  • Another characteristic of the present invention is a fiber bundle for artificial hair wherein the polyvinyl chloride-based resin fiber includes a silicone-based compound in a content of 0 to 0.5 omf %.
  • Another characteristic of the present invention is an artificial hair product obtained by processing a fiber bundle for artificial hair including 20 to 100% by weight of a polyvinyl chloride-based resin fiber having a shrinkage stress of 70 ⁇ N/dtex or less at 130° C. and 0 to 80% by weight of a thermoplastic resin fiber having a composition including no polyvinyl chloride-based resin.
  • a fiber for artificial hair and an artificial hair product having an excellent styling property and a soft and smooth texture similar to that of human hair can be obtained.
  • FIG. 1 is a diagram showing measurement results of a shrinkage stress of polyvinyl chloride-based resin fibers described in Preparation Examples 1-4 of the present invention wherein PVC-1 is a conventional product, and PVC-2 to PVC-4 are improved products of the present invention.
  • the fiber bundle for artificial hair of the present invention is characterized by including 20 to 100% by weight of a polyvinyl chloride-based resin fiber having a shrinkage stress of 70 ⁇ N/dtex or less at 130° C., and 0 to 80% by weight of a thermoplastic resin fiber having a Young's modulus of 4 to 9 GPa, a shrinkage percentage of 10% or less at 130° C., and a composition including no polyvinyl chloride-based resin.
  • the fiber bundle in the present invention refers to a bulk material of two or more monofilaments with each size being 20 to 100 dtex, which may be fixed in order not to break the bulk material of monofilaments or may not be fixed.
  • Synthetic fibers for artificial hair are usually produced as bundles of continuous fiber having a length of several hundreds of meters, and the bundles are cut into an arbitrary length and they are made into a product by mixing the fibers and imparting a curl shape when they are processed into a commodity.
  • the term “fiber bundle” in the present invention is not particularly limited, and it shows, for example, a bundle of continuous fiber in the production, a cut fiber bundle in the commodity process, a fiber bundle in a product for hair, and the like, unless otherwise specified.
  • the polyvinyl chloride-based resin fiber used in the present invention is a fiber including as a main component a polyvinyl chloride-based resin, and is characterized by having a small shrinkage stress.
  • the shrinkage stress has a tendency to become higher when the shrinkage percentage is high. Even if there is a potential shrinkage stress, however, it is possible to reduce a stress caused during shrinkage, whereby the occurrence of fiber bending can be suppressed.
  • a method in which a mild heat treatment is performed at a high temperature, for example, of 110° C. or higher for a long period of time in a fiber production is effective, and the shrinkage stress can be reduced even if the same shrinkage percentage is maintained.
  • the method for reducing the shrinkage stress is not limited to this, but any method can be used.
  • the polyvinyl chloride-based resin fiber generally has a shrinkage stress with a peak at about 130° C. as shown in FIG. 1 , and in the present invention a preferable value of the shrinkage stress is specifically 70 ⁇ N/dtex or less, preferably 50 ⁇ N/dtex or less, more preferably 40 ⁇ N/dtex at 130° C.
  • the shrinkage stress is more than 70 ⁇ N/dtex, the effect by the thermoplastic resin fiber, which supports the polyvinyl chloride-based resin fiber and suppresses the shrinkage, is insufficient. This causes deflection and fiber bending in the polyvinyl chloride-based resin fiber, thus resulting in deteriorated texture.
  • the polyvinyl chloride-based resin fiber used in the present invention can be preferably used as a polyvinyl chloride-based resin fiber for artificial hair.
  • the polyvinyl chloride-based resin fiber used in the present invention has a component percentage of 20 to 100% by weight, preferably 30 to 75% by weight, more preferably 40 to 60% by weight in the fiber bundle for artificial hair.
  • the component percentage is less than 20% by weight in the fiber bundles for artificial hair, the soft texture and the styling property, which are provided by the polyvinyl chloride-based resin fiber, are insufficient, and the satisfactory quality as a commodity cannot be obtained, i.e., the quality as a commodity tends to be deteriorated.
  • the polyvinyl chloride-based resin fiber used in the present invention can be preferably used in the state of a fiber bundle before processing into a commodity.
  • the phrase “supported on a fiber surface” refers to a state in which a specific compound bonds to a surface layer of the fiber, and components which penetrate inside the fiber and cannot be removed therefrom are excluded.
  • the conventional polyvinyl chloride-based resin fiber for hair has a problem in which fusion occurs between the fibers, and thus the soft texture similar to that of human hair, which is provided by the starting material, cannot be obtained. This is caused by an insufficient performance of an oil solution usually used in a step in order to suppress fusion.
  • a mixed emulsion including a nonionic surfactant, a cationic surfactant, an oil component such as an ester oil, and the like has been used as the oil solution in a step, but these oil solutions are all low molecular weight components having a weight average molecular weight of less than 1500. This is because the use of a component having a high molecular weight leads to a sticky texture and to difficulty in sufficiently washing out the oil solution when another oil solution is used in processing the commodity instead of the oil solution which has been used, causing a problem of insufficient texture in a final commodity.
  • a polyalkylene oxide compound in which an alkylene oxide including ethylene oxide is addition polymerized to an organic compound having two active hydrogen groups can be preferably used.
  • the organic compound including two active hydrogen groups may include, for example, ethylene glycol, propylene glycol, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, 1,6-hexanediol, aniline, and the like. At least one compound selected from these compounds can be preferably used.
  • the alkylene oxide including ethylene oxide is ethylene oxide or an alkylene oxide having 3 to 30 carbon atoms, and for example, propylene oxide, butylene oxide, styrene oxide, ⁇ -olefin epoxide, or glycidyl ethers can be used. At least one compound selected from these compounds can be preferably used. Of these, compounds whose number of carbon atoms is small are preferable in terms of the texture, but because it is necessary to have fluidity at room temperature for obtaining the effect of suppressing fusion, a copolymer of ethylene oxide and propylene oxide is preferable.
  • the addition polymerization of the alkylene oxide can be performed according to a known method, and either a random type or a block type may be performed.
  • the weight average molecular weight is enough from 2000 to 25000, preferably from 5000 to 20000, more preferably from 10000 to 18000.
  • the weight average molecular weight is less than 2000, the compound is penetrated inside the fiber on heating to reduce the effect of suppressing fusion, thus resulting in hard texture of the fiber; whereas when it is more than 25000, the deteriorated texture with sticky feel is obtained even if the adhering amount is controlled.
  • the polyalkylene oxide compounds having different weight average molecular weights within the range described above may be mixed.
  • An amount of the polyalkylene oxide-based compound used in the present invention supported on the fiber is enough from 0.07 to 0.5 omf %, preferably from 0.07 to 0.3 omf %, more preferably from 0.1 to 0.2 omf %.
  • the amount of the compound supported on the fiber is less than 0.07, the fiber becomes hard because of insufficient effect of suppressing fusion, and the comb-passing property or the effect of suppressing static electricity becomes insufficient.
  • the amount of the compound supported on the fiber is more than 0.5 omf %, deteriorated texture with sticky feel is obtained, and the fibers converge excessively to deteriorate the voluminousness.
  • a silicone-based compound may be supported on the polyvinyl chloride-based resin fiber used in the present invention, in addition to the polyalkylene oxide-based compound.
  • a silicone-based compound having a specific viscosity does not penetrate inside the fiber, similar to the polyalkylene oxide-based compound, and a high effect of suppressing fusion can be obtained therefrom. Further, when an amino-modified silicone-based compound is used as the silicone-based compound, the good texture can be obtained by performing the heat treatment at a high temperature, as described above.
  • the fiber bending is not caused, and thus the heating can be performed at a temperature higher than a temperature at which a curl shape is imparted, whereby a higher effect of improving the texture can be obtained.
  • the silicone-based compound cannot be used alone as the oil solution because of its large charging effect, it is necessary to use it together with the polyalkylene oxide-based compound.
  • silicone-based compound used in the present invention linear polydimethyl siloxanes which are in a liquid state at 23° C., or compounds generally called “silicone oils” in which an amino group, an epoxy group, a carboxyl group, a polyether group, or a thiol group is introduced into a side chain of the polydimethylsiloxane, and which have a methyl group or a hydroxyl group at the molecular ends can be preferably used.
  • multiple silicone compounds may be mixed for the surface of the fiber, and a silsesquioxane having the functional group described above may be mixed within a range in which stability of an emulsion can be maintained.
  • polydimethylsiloxane, amino group-modified dimethylsiloxane, and epoxy-modified dimethylsiloxane are preferable, and amino-modified dimethylsiloxane and dimethylsiloxane are more preferable.
  • the amino-modified dimethylsiloxane can be compatible with the surface of the fiber at a temperature relatively lower than that used in other silicone compounds, and thus the better texture can be obtained. When dimethylsiloxane is added in an arbitrary amount thereto, smoother texture can be obtained.
  • a molecular weight of the silicone oil among the silicone compounds is generally often defined as a kinematic viscosity, and in the present invention, the kinematic viscosity thereof is preferably from 500 to 20000 mm 2 /s, more preferably from 1000 to 10000 mm 2 /s at 25° C.
  • the kinematic viscosity is less than 500 mm 2 /s, the amount penetrating inside the fiber is increased, and thus the effect of suppressing fusion becomes insufficient, thus the fiber becomes hard.
  • it is more than 20000 mm 2 /s it is difficult to uniformly attach it on the surface of the fiber, and thus the sufficient effect of suppressing fusion and improving the texture cannot be obtained.
  • An amount of the silicone compound used in the present invention supported on the fiber is enough from 0 to 0.5 omf %, preferably from 0.02 to 0.3 omf %, more preferably from 0.05 to 0.2 omf %.
  • the amount supported on the fiber is more than 0.5 omf %, static electricity is caused because of a large charging effect, and a problem in which monofilaments get tangled arises during processing the fiber.
  • an anti-static agent and a smoothing agent in addition to the polyalkylene oxide-based compound and the silicone-based compound.
  • an amount of oil components such as a mineral oil which penetrates into the fiber to exhibit a plasticizing effect and an ester oil is preferably small.
  • the adhering amount of the oil component is preferably 0.15 omf % or less, more preferably 0.07 omf % or less.
  • a method for mixing or producing the polyvinyl chloride-based resin fiber used in the present invention is not particularly limited, and it can be produced in a conventionally known production method. In order to obtain a fineness or a cross-sectional shape of the fiber suitable for the fiber for hair, it is preferable to use production methods in that field. One example thereof will be explained below.
  • the polyvinyl chloride-based resin fiber used in the present invention is the fiber including as a main component the polyvinyl chloride-based resin, and a known compounding agent used in a vinyl chloride composition may be added thereto according to its purpose, so long as the quality of the fiber such as transparency or spinning stability is not impaired.
  • a heat-resistance improver such as a chlorinated vinyl chloride resin or an AS resin, a metal soap-based heat stabilizer, a stabilizing aid such as a ⁇ -diketone, phosphite, or polyol, a plasticizer, a ultra-violet absorber, an antioxidant, an anti-static agent, a filler, a flame retardant, a pigment, or the like, may be used.
  • a specific compounding agent such as a foaming agent, a cross-linking agent, a tackifier, an agent of providing conductivity, and a perfume may be used.
  • the polyvinyl chloride-based resin used in the polyvinyl chloride-based resin fiber used in the present invention may be a conventionally known homopolymer resin of vinyl chloride, conventionally known various copolymer resins thereof, or the like, which is not particularly limited.
  • the copolymer resin may typically include copolymer resins of vinyl chloride and a vinyl ester such as a vinyl chloride-vinyl acetate copolymer resin and a vinyl chloride-vinyl propionate copolymer resin; copolymer resins of vinyl chloride and an acrylic ester such as a vinyl chloride-butyl acrylate copolymer resin and a vinyl chloride-2-ethylhexyl acrylate copolymer resin; copolymer resins of vinyl chloride and an olefin such as a vinyl chloride-ethylene copolymer resin and a vinyl chloride-propylene copolymer resin; vinyl chloride-acrylonitrile copolymer resins, and the like.
  • a vinyl ester such as a vinyl chloride-vinyl acetate copolymer resin and a vinyl chloride-vinyl propionate copolymer resin
  • copolymer resins of vinyl chloride and an acrylic ester such as a vinyl
  • Preferable vinyl chloride resin may include the homopolymer resin of vinyl chloride.
  • a content of the comonomer is not particularly limited, and it can be decided depending on the molding processability into fiber, and the property of the fiber.
  • the copolymer resin has a low softening temperature, however, it is preferable to use it together with the homopolymer resin of vinyl chloride, because it results in reduced heat-resistance.
  • the vinyl chloride resin used in the polyvinyl chloride-based resin fiber used in the present invention has a viscosity-average polymerization degree of preferably 450 or more, in order to obtain sufficient strength and heat-resistance as the fiber.
  • the polymerization degree is preferably 1800 or less.
  • its viscosity-average polymerization degree is particularly preferably within a range of 650 to 1450.
  • the copolymer When the copolymer is used, its viscosity-average polymerization degree is particularly preferably within a range of 1000 to 1700, though it also depends on the content of the comonomer.
  • the viscosity-average polymerization degree is obtained by solving 200 mg of a resin in 50 ml of a nitrobenzene, measuring a specific viscosity of the resulting polymer solution in a thermostatic chamber having a temperature of 30° C. using a Ubbelohde viscometer, and performing calculation in accordance with JIS-K-6721.
  • the vinyl chloride resin used in the polyvinyl chloride-based resin fiber used in the present invention can be produced by an emulsion polymerization, a bulk polymerization, a dispersion polymerization, or the like.
  • a polymer produced by the dispersion polymerization is preferable, in consideration of an initial colorability of the fiber, and the like.
  • a chlorinated vinyl chloride resin can also be used as the vinyl chloride resin in the polyvinyl chloride-based resin fiber used in the present invention.
  • the chlorinated vinyl chloride resin a polymer obtained by reacting chlorine with a vinyl chloride resin used as a starting material to increase its chlorine content to 58 to 72% is used.
  • the chlorinated vinyl chloride resin preferably has a viscosity-average polymerization degree (a viscosity-average polymerization degree of the vinyl chloride resin which is the starting material) of 300 to 1100.
  • the resulting fiber has a slightly high shrinkage percentage, because the effect of lowering a heat shrinkage percentage of the fiber is reduced.
  • the viscosity-average polymerization degree is more than 1100, a melt viscosity becomes high and a nozzle pressure becomes high on spinning, and thus it tends to be difficult to perform a safety operation.
  • the chlorinated vinyl chloride resins having a viscosity-average polymerization degree of 500 to 900 are particularly preferable.
  • the chlorinated vinyl chloride resin is preferably used as it is mixed with a vinyl chloride resin rather than used alone, in terms of yarn breakage on the spinning and coloration of the yarn due to heat. It is preferable to mix the chlorinated vinyl chloride resin in a content of 0 to 40% by weight based on 100 to 60% by weight of the vinyl chloride resin, and more preferably the chlorinated vinyl chloride resin is mixed in a content of 10 to 30% by weight based on 90 to 70% by weight of the vinyl chloride resin. When the content of the chlorinated vinyl chloride resin is more than 40% by weight, yarn breakage easily occurs on the spinning.
  • a stabilizer used for the polyvinyl chloride-based resin fiber used in the present invention known stabilizers may be used, and of these at lease one heat stabilizer selected from tin-based heat stabilizers, Ca—Zn-based heat stabilizers, hydrotalcite-based heat stabilizers, epoxy-based heat stabilizers, and ⁇ -diketone-based heat stabilizers are preferable. It is preferable to use the heat stabilizer in an amount of 0.2 to 5 parts by weight, more preferably 1 to 3 parts by weight. When the amount is less than 0.2 part by weight, effects as the heat stabilizer are poor. When it is more than 5 parts by weight, the heat stability cannot be greatly improved, and thus it is economically disadvantageous.
  • the long-run spinning property refers to a property in which a continuous operation can be stably performed over several days without stopping the spinning step and fibers can be produced.
  • the tin-based stabilizer may include mercaptotin-based heat stabilizers such as dimethyl tin mercapto, dimethyl tin mercaptide, dibutyl tin mercapto, dioctyl tin mercapto, dioctyl tin mercaptopolymers, and dioctyl tin mercaptoacetate; tin maleate-based heat stabilizers such as dimethyl tin maleate, dibutyl tin maleate, dioctyl tin maleate, and dioctyl tin maleate polymers; and tin laurate-based heat stabilizers such as dimethyl tin laurate, dibutyl tin laurate, and dioctyl tin laurate.
  • mercaptotin-based heat stabilizers such as dimethyl tin mercapto, dimethyl tin mercaptide, dibutyl
  • the Ca—Zn-based heat stabilizer may include zinc stearate, calcium stearate, zinc 12-hydroxystearate, calcium 12-hydroxystearate, and the like.
  • the hydrotalcite-based heat stabilizer may include ALCAMIZER manufactured by Kyowa Chemical Industry Co., Ltd.
  • the epoxy-based heat stabilizer may include, for example, epoxidized soybean oil and epoxidized linseed oil.
  • the ⁇ -diketone-based heat stabilizer may include, for example, stearoylbenzoylmethane (SBM), dibenzoylmethane (DBM), and the like.
  • a lubricant used for the polyvinyl chloride-based resin fiber used in the present invention conventionally known lubricants can be used.
  • at least one lubricant selected from the group consisting of metal soap-based lubricants, polyethylene-based lubricants, higher fatty acid-based lubricants, ester-based lubricants, and higher alcohol-based lubricants is preferable.
  • the lubricant is effective for controlling a molten state of the composition, and a bonded state of the composition and a metal face of screws, cylinders, or dies in an extruder.
  • the lubricant is preferably used in an amount of 0.2 to 5 parts by weight based on 100 parts by weight of the vinyl chloride resin.
  • the lubricant is more preferably used in an amount of 1 to 4 parts by weight.
  • the amount is less than 0.2 part by weight, the productivity is reduced because a die pressure is increased and an ejection amount is reduced on spinning. Moreover, the yarn breakage and the increase of the nozzle pressure tend to happen more easily, thus resulting in difficulty in stable production.
  • it is more than 5 parts by weight, the ejection amount is reduced and the yarn breakage frequently occurs, and thus it is difficult to perform stable production as in the case in which the amount is less than 0.2 part by weight, and the fiber tends not to be clear, so that such an amount is not preferable.
  • the metal soap-based lubricant may include, for example, metal soaps such as stearate, laurate, palmitate, and oleate of Na, Mg, Al, Ca, and Ba.
  • the higher fatty acid-based lubricant may include, for example, saturated fatty acids such as stearic acid, palmitic acid, myristic acid, lauric acid, and capric acid; unsaturated fatty acids such as oleic acid; and their mixtures.
  • the higher alcohol-based lubricant may include stearyl alcohol, palmityl alcohol, myristyl alcohol, lauryl alcohol, oleyl alcohol, and the like.
  • the ester-based lubricant may include ester-based lubricants including an alcohol and a fatty acid; pentaerythritol-based lubricants such as monoester, diesters, triesters, tetraesters, or mixtures thereof of a higher fatty acid with pentaerythritol or dipentaerythritol; montanoic acid wax-based lubricants such as esters of montanoic acid with a higher alcohol including a stearyl alcohol, palmityl alcohol, myristyl alcohol, lauryl alcohol, or oleyl alcohol.
  • ester-based lubricants including an alcohol and a fatty acid
  • pentaerythritol-based lubricants such as monoester, diesters, triesters, tetraesters, or mixtures thereof of a higher fatty acid with pentaerythritol or dipentaerythritol
  • a processing aid for example, a matting agent, a filler, a plasticizer, an ultraviolet absorber, an anti-oxidant, an anti-static agent, a flame retardant, and a pigment may be used according to the purpose.
  • EVA ethylene-vinyl acetate
  • PES-250 manufactured by Nippon Unicar Company Limited
  • acrylic resin for example, PA-20 manufactured by KANEKA CORPORATION, and the like, for further improving extrusion processability.
  • the polyvinyl chloride-based resin fiber used in the present invention can be produced by a known melt-spinning method in a fiber formation step.
  • the vinyl chloride-based resin, the chlorinated vinyl chloride-based resin, the heat stabilizer, and the lubricant are mixed in a pre-determined ratio; the mixture is stirred in a Henschel mixer, or the like; the resulting mixture is filled in an extruder; the resin is extruded under conditions providing good spinning properties at a cylinder temperature of 150 to 190° C. and a nozzle temperature of 180 ⁇ 15° C., thereby performing melt-spinning to obtain unstretched yarns.
  • a conventionally known extruder can be used for spinning the unstretched yarns.
  • a single screw extruder a counter-rotating twin screw extruder, or a conical twin screw extruder. It is particularly preferable to use a single screw extruder with an aperture size of about 35 to 85 mm ⁇ , or a conical extruder with an aperture size of about 35 to 50 mm ⁇ .
  • a hole shape of the nozzle used then is made to be similar to a final cross-sectional shape, while considering and controlling the shape and size, which are slightly changed depending on the die swell and the stretching on spinning.
  • the shape of the nozzle hole is not particularly limited, and can be selected from round-shape, flat oval-shape, eye-glass-shape, cocoon-shape, star-shape, C-shape, H-shape, T-shape, Y-shape, cross-shape, pentagon-shape, hexagon-shape, and octagon-shape. It is desirable not to remarkably increase the rigidity, and of these the flat oval-shape, the eye-glass-shape, and the cocoon-shape are preferable, and the eye-glass-shape and the cocoon-shape are more preferable.
  • the extruded filaments are subjected to heat-treatment for about 0.5 to 1.5 seconds in a heat-spinning tube (at a 200 to 300° C. atmosphere, and under conditions providing good spinning property) provided directly under the nozzle, and then the resulting unstretched yarns are sent through a take-in roll to a stretching process.
  • the unstretched yarns are stretched about two to four times between the take-in roll and a stretching roll through a hot-air circulation chamber in which the temperature has been adjusted to 100 to 130° C.
  • a relaxation treatment is continuously performed at about 20 to 50%, and multifilaments are wound, whereby the fiber of the present invention is produced.
  • a high heat-treatment temperature is desirable to reduce the shrinkage stress, it is preferably from 120 to 145° C., more preferably from 130 to 140° C.
  • the shrinkage stress cannot be sufficiently reduced at 130° C., thus resulting in occurrence of fiber bending to deteriorate the quality as a commodity; whereas when it is higher than 150° C., the fusion between the fibers cannot be suppressed even if the polyalkylene oxide compound is supported, and thus the texture becomes hard.
  • the relaxation speed In order to reduce a strain in the molecule, it is desirable to set the relaxation speed as slow as possible, and it is preferable to set it at a relaxation rate of 10%/minute or less, more preferably at a relaxation rate of 8%/minute or less.
  • the time for the mild heat treatment is preferably from 2 to 60 minutes, more preferably from 4 to 20 minutes.
  • the fiber may be further stretched within a range of 0.1 to 4%, after the mild heat treatment. Furthermore, in order to melt the slight fusion between the fibers, nip rolls and bended parts may be introduced into the step after the mild heat treatment.
  • the monofilament forming the fiber for artificial hair of the present invention has a fineness of preferably 20 to 100 dtex, similar to usual fiber for artificial hair, and more preferably 40 to 90 dtex.
  • the fineness is thinner than 20 dtex, the curls become too weak after the commodity process, and thus the styling property is remarkably deteriorated.
  • it is thicker than 100 dtex, the rigidity of the fiber becomes high, and thus the texture becomes hard.
  • thermoplastic resin fiber used in the present invention is characterized by having a Young's modulus of 4 to 9 GPa, a shrinkage percentage of 10% or less at 130° C., and a composition including no polyvinyl chloride-based resin, and characterized in that it is included in a component percentage of 0 to 80% by weight in the fiber bundle for artificial hair.
  • the thermoplastic resin fiber has a role to suppress the shrinkage of the polyvinyl chloride-based resin fiber, thereby preventing the deterioration of the texture, and thus it is necessary to have rigidity to absorb the shrinkage stress.
  • the rigidity can be shown using the Young's modulus as an indicator.
  • the Young's modulus When the Young's modulus is less than 4 GPa, the effect of suppressing the shrinkage of the polyvinyl chloride-based resin fiber cannot be sufficiently obtained, and the texture is deteriorated due to the occurrence of the fiber bending. When the Young's modulus is more than 9 GPa, the texture and the styling property are deteriorated because of too strong resilience as the fiber for hair.
  • thermoplastic resin fiber it is necessary for the thermoplastic resin fiber not to be softened and deformed at a temperature at which the curl shape is imparted, and the shrinkage percentage at 130° C. can be used as its indicator.
  • the shrinkage percentage is measured in the present invention, a fiber bundle having a total fineness of 15000 to 25000 dtex obtained by combining monofilaments is used, the measurement is performed 20 times, and an average thereof is used. At this time, a large fluctuation range in the shrinkage percentage even in the same fibers results in the fiber bending.
  • fibers having a difference in shrinkage percentage of 2% or more from the average shrinkage percentage are included in a content of 30% or more in the same fibers, it is preferable not to use such fibers, because the good texture may not be maintained.
  • thermoplastic resin fiber used in the present invention it is necessary for the thermoplastic resin fiber used in the present invention to have a shrinkage percentage of 10% or less at 130° C., and it is preferably 4% or less, more preferably 1% or less.
  • shrinkage percentage is more than 10% at 130° C., the effect of suppressing the shrinkage of the polyvinyl chloride-based resin fiber cannot be sufficiently obtained, and the fiber bending occurs to deteriorate the texture.
  • thermoplastic resin fiber used in the present invention is included in a component percentage of 0 to 80% by weight, preferably 25 to 70% by weight, more preferably 40 to 60% by weight, in the fiber bundle for artificial hair.
  • component percentage in the fiber bundle for artificial hair is more than 80% by weight, the soft texture and styling property, which is provided by the polyvinyl chloride-based resin fiber, cannot be sufficiently obtained, and thus the quality as a commodity is deteriorated.
  • the ingredients of the thermoplastic resin fiber used in the present invention are not particularly limited so long as they are thermoplastic resins excluding polyvinyl chloride-based resins.
  • the polyvinyl chloride-based resin fiber it is possible to increase the rigidity by adding, for example, an inorganic substance thereto, but there is a property in which the fiber bending becomes sharp if deflection occurs, and thus it is difficult to prevent the deterioration of the texture, as described above.
  • the ingredient for the thermoplastic resin fiber may specifically include, for example, acrylonitrile-based resins, modacrylic resins, polyolefin-based resins, polyester-based resins, polyamide-based resins, polyimide-based resins, polyether-imide-based resins, polyamide-imide-based resins, polyoxymethylene-based resins, polyether-ketone-based resins, polycarbonate-based resins, polysulfone-based resins, polyether-sulfone-based resins, polyphenylene-ether-based resins, polyphenylene-sulfide-based fibers, Teflon® resins, and the like.
  • the acrylonitrile resins, the modacrylic resins, the polyester-based resins, the polyamide-based resins, the polycarbonate-based resins, the polyether-sulfone-based resins, and the polyphenylene-sulfide-based resins are preferably used, because they can be naturally mixed as the fiber for hair, and the modacrylic resin and the polyester-based resins are more preferably used.
  • these ingredients may be mixed, and further a composite fiber having a multi-layer structure such as a core-sheath structure may be used.
  • the thermoplastic resin fiber used in the present invention has an LOI value of preferably 25 or more.
  • the product for hair is required to have flame retardance in terms of its intended purpose, and a certain level of the flame retardance can be obtained by mixing a large amount of a polyvinyl chloride-based resin fiber having a fire extinguishing performance.
  • the present invention is characterized by providing the fiber bundle for artificial hair, which is suitable for supporting the flammable amino-modified silicone compound on the fiber bundle, and it is desirable that the fiber bundle for artificial hair has high-level of flame retardance. For this reason, it is desirable that the thermoplastic resin fiber itself has also flame retardance, and the LOI value is used as its indicator.
  • the thermoplastic resin fiber used in the present invention has an LOI value of preferably 25 or more, more preferably 27 or more.
  • the LOI value is less than 25, the fiber bundle cannot have sufficient flame retardance, and thus has a possibility of ignition and the spread of the fire.
  • An LOI value of 25 or more may be obtained by a method in which a flame retardant resin such as a modacrylic resin or a polyphenylene sulfide-based resin is used, and a method in which various flame retardants are added to the resin.
  • the flame retardants which can be used for the thermoplastic resin fiber in the present invention, are not particularly limited as far as they do not impair the gloss and the hue, and specifically, for example, phosphorus-based flame retardants, bromine-containing polymers, and chlorine-containing polymers can be used. If necessary, a flame retardant promoter such as an antimony compound may be suitably used.
  • thermoplastic resin fiber used in the present invention multiple different kinds of fibers may be mixed, as long as they have the Young's modulus, the shrinkage percentage, and the LOI value which satisfy the conditions described above.
  • a fiber having a small specific gravity or a fiber whose surface is uneven such as an acrylic synthetic fiber described in WO 2005/082184, may be used.
  • the curl shape when the fiber bundles obtained by mixing the polyvinyl chloride-based resin fiber with the thermoplastic resin fiber are processed into a commodity for hair, the curl shape can be imparted at 95 to 130° C. by supporting the amino-modified silicone compound on the surface of the fiber bundle.
  • the amino-modified silicone compound used in the present invention has a role to exhibit the smooth moisturizing feel similar to that of human hair.
  • a conventional oil solution including no silicone compound is used for the polyvinyl chloride-based resin fiber, the resulting one has the problem in which fusion between the fibers occurs if heated at 95° C. or higher, thus resulting in hard texture of the product for hair.
  • the amino-modified silicone compound has a role to suppress the fusion.
  • the amino-modified silicone compound used in the present invention is an oily compound in which imino group or amino group are at side chains of a linear polydimethyl siloxane, which is liquid at 23° C.
  • the compound bonds to the fiber in the state of a monomolecular film more effectively than dimethyl silicone compounds usually used due to the adsorption of the amino groups to the fiber surface, and it reduces a surface energy of the fiber to reduce a frictional resistance, thus resulting in the acquisition of the good moisture texture with the smooth moisturizing feel, which is preferred in human hair.
  • An appropriate amine equivalent of the amino-modified silicone compound in the present invention is from 1000 to 20000 g/mol, preferably from 1250 to 10000 g/mol, more preferably from 1500 to 5000 g/mol.
  • the texture and the use durability are deteriorated because of too many amino groups; whereas when the amine equivalent is more than 20000 g/mol, the adsorption amount to the fiber is reduced, and thus the texture is also deteriorated.
  • Any of a methyl group, a hydroxyl group, and an amino group is attached to the molecular ends of the amino-modified silicone compound without problems, and an amino-modified silsesquioxane may be added within a range in which the mixture can keep a liquid state.
  • the curl shape can be imparted at 95 to 130° C. by the combination of the polyvinyl chloride-based resin fiber with the thermoplastic resin fiber, and the adsorption of the amino-modified silicone compound into the surface of the fiber can be optimized by heating it at such a high temperature. This can further improve the smoothness and the resistance of omission from the fiber surface, compared to a conventional case in which heating is performed at 90° C., thus resulting in the improved texture and use durability.
  • the amino-modified silicone having a low molecular weight penetrates inside the fiber, and thus the original improvement effect is reduced. It is necessary, accordingly, to select an optimum molecular weight.
  • the molecular weight of the silicone oil among the silicone compounds is often defined in a kinematic viscosity.
  • the amino-modified silicone compound in the present invention has a kinematic viscosity of preferably 500 to 20000 mm 2 /s, more preferably 1000 to 10000 mm 2 /s at 25° C.
  • the kinematic viscosity is less than 500 mm 2 /s, the penetration amount into the inside of the fiber is too much, and thus the effect of improving the texture becomes insufficient; whereas when it is more than 10000 mm 2 /s, it is difficult to perform the uniform adhesion on the surface of the fiber, and thus the effect of improving the texture is deteriorated.
  • a method for supporting the amino-modified silicone compound used in the present invention on the fiber is not particularly limited, and there is, for example, a method in which an emulsion thereof using water as a vehicle is prepared, the fiber is immersed in the emulsion, and the amount thereof remaining on the fiber is controlled by centrifugal dehydration to support it on the surface of the fiber, or the like.
  • a solid concentration is controlled to 5 to 25% by using a surfactant, and the like, and the resulting emulsion is used after neutralization with acetic acid, or the like, as needed.
  • an anti-static agent or a smoothing agent may be used together.
  • a preferable component used together may include nonionic surfactants having a smoothing effect or an antistatic effect and functioning also as a surfactant in the emulsification.
  • the fiber Before the fiber is immersed in the emulsion of the amino-modified silicone compound, the fiber may be washed with a surfactant, in order to remove the extra fiber-treating agent adhering to the surfaces of the polyvinyl chloride-based resin fiber and the thermoplastic resin fiber therefrom.
  • the amount of the amino-modified silicone compound used in the present invention supported on the fiber is enough from 0.05 to 0.8 omf %, preferably from 0.1 to 0.6 omf %, and more preferably from 0.2 to 0.4 omf %.
  • the support amount on the fiber is less than 0.05 omf %, the effect of improving the texture is small; whereas when it is more than 0.8 omf %, the fibers converge excessively to deteriorate the voluminousness, thus resulting in the deteriorated quality as a commodity.
  • the fiber bundle for artificial hair of the present invention is characterized by imparting the curl shape at 95 to 130° C.; by the relationship in which the shrinkage percentage of the polyvinyl chloride-based resin fiber is not lower than the shrinkage percentage of the thermoplastic resin fiber at that temperature; and by a difference in the shrinkage percentage between the polyvinyl chloride-based resin fiber and the thermoplastic resin fiber of 6% or less.
  • a method of imparting the cure shape is not particularly limited and, for example, a method in which fiber bundles are wound spirally or concentrically around a cylindrical pipe, the resulting pipe is heated at a pre-determined temperature for a pre-determined time while that shape is maintained, whereby the fiber bundles memorize the wound shape, and then the fiber bundles are removed from the pipe after cooling it can be employed.
  • a bore diameter of the pipe used in this step can be arbitrarily selected depending on the style of the commodity.
  • the thermoplastic resin fiber bonds to the polyvinyl chloride-based resin fiber to form multiple fulcrums, and it supports the polyvinyl chloride-based resin fiber at the fulcrums to exhibit the effect of suppressing the shrinkage.
  • the temperature at which the curl shape is imparted is set at a high temperature, the effect of improving the styling property and the effect of improving the texture of the amino-modified silicone are increased, but when the temperature is too high, the polyvinyl chloride-based resin fiber is molten by heat, thus resulting in the hard texture. For this reason, it is necessary to set the temperature within a range of 95 to 130° C., considering the balance between both, and the temperature is preferably from 100° C. to 120° C., more preferably from 105° C. to 115° C.
  • the temperature at which the curl shape is imparted is lower than 95° C.
  • the effect of improving the texture is not sufficient, and the styling property may be sometimes further deteriorated, compared to a case of using the polyvinyl chloride-based resin fiber alone, because the temperature is lower than the lowest temperature at which the thermoplastic resin fiber is processed.
  • the temperature at which the curl shape is imparted is higher than 130° C.
  • the difference in the shrinkage between the polyvinyl chloride-based resin fiber and the thermoplastic resin fiber is large even in the temperature range described above, the deflection is caused in the thermoplastic resin fiber to reduce the adhesion power between the fibers, thereby causing the fiber bending on the polyvinyl chloride-based resin fiber, thus resulting in the deteriorated texture.
  • the difference in the shrinkage percentage between the polyvinyl chloride-based resin fiber and the thermoplastic resin fiber is preferably 4% or less, more preferably 3% or less.
  • thermoplastic resin fiber When the difference in the shrinkage between the polyvinyl chloride-based resin fiber and the thermoplastic resin fiber is more than 6%, the deflection is caused in the thermoplastic resin fiber to reduce the adhesion power between the fibers, thereby causing the fiber bending on the polyvinyl chloride-based resin fiber, thus resulting in the deteriorated texture.
  • the thermoplastic resin fiber may be formed from multiple fibers having multiple compositions, but it is necessary that the fiber having any composition satisfies the relationship in the shrinkage percentage described above.
  • a fiber bundle having a total fineness of 18000 ⁇ 3000 dtex was formed by selecting monofilaments of one material from fiber bundles before or after mixing fibers and combining them.
  • the resulting fiber bundle was cut into a length of 40 cm, marks were put at positions of 5 cm from both ends, heating was performed in a drying condition at a pre-determined temperature for 30 minutes while the one end was fixed, and cooling was performed at room temperature. After cooling, a length between the marks on the fiber bundle was measured, and a shrinkage percentage was obtained as a percentage thereof based on the original length of 30 cm. The measurement was repeated total of 20 times, and an average value thereof was defined as a shrinkage percentage of a sample.
  • the length between the marks can be shortened depending on the length which can be sampled, because a sample may sometimes have a length of shorter than 40 cm in an actual product for hair.
  • the mixed solvent was then vaporized by being heated at 120° C., and a weight of the residue of compounds, which were not vaporized, was measured.
  • a heat shrinkage stress of a fiber was measured. Ten monofilaments having a length of 10 mm were taken, a load of 336.2 mN was applied to the filaments, and a shrinkage stress was measured at a rate of temperature rise of 5° C./minute at a range of 30 to 240° C. A shrinkage stress value at 130° C. was divided by the number of the monofilaments of the sample, 10, to obtain a shrinkage stress per monofilament, and the obtained value was divided by a fineness of the monofilament to obtain a shrinkage stress ( ⁇ N/dtex) per unit fineness.
  • a monofilament was pulled out and left at rest on a horizontal plate under no-load, and its shape was captured as a digital image.
  • the number of fiber bendings having an angel of less than 170° was counted in 8 fibers having a length of 20 cm per sample, and the number of fiber bendings per m was obtained.
  • the number of fiber bendings of each material was counted, and the number obtained was multiplied by a component percentage to obtain the number of fiber bendings as a fiber bundle.
  • the fiber smoothness was evaluated according to the following five-grade evaluation based on evaluations by general technicians who engaged in evaluations of beauty product such as a wig, and the sample with 3 points or more was evaluated as acceptable.
  • a five-grade appearance evaluation was performed based on repeatability of the soft texture similar to that of human hair by general technicians who engaged in evaluations of beauty product such as a wig, and the sample with 3 points or more was evaluated as acceptable.
  • 5 point soft and good texture almost the same as human hair. 4 point: soft texture similar to that of human hair. 3 point: texture relatively similar to that of human hair, though the sample has a little hard feel. 2 point: texture of hard feel peculiar to a synthetic fiber. 1 point: texture which is apparently different from human hair with the sample having fusion between fibers in part.
  • a five-grade appearance evaluation was performed based on whether or not the sample had the moisture feel or moisturizing feel similar to that of human hair by general technicians who engaged in evaluations of beauty product such as a wig, and the sample with 3 points or more was evaluated as acceptable.
  • 5 point Good state in which curls bound with pulsing feel and without uncomfortable feeling and the curl shape is hardly disheveled when the sample is moved.
  • 4 point State in which curls bound without uncomfortable feeling and the curl shape is not largely disheveled when the sample is moved.
  • 3 point State in which curls weekly bound and the curl shape is slightly disheveled when the sample is moved.
  • 2 point A state in which curls hang down and the curl shape is largely disheveled when the sample is moved.
  • 1 point State in which curls are elongated and largely disheveled after the sample is retained for 60 hours and before moved.
  • the fiber bundle for artificial hair As for the fiber bundle for artificial hair, a five-grade voluminousness evaluation was performed based on the appearance of the fiber bundle sample and the resiliency thereof when it was grasped tightly by general technicians who engaged in evaluations of beauty product such as a wig, and the sample with 3 points or more was evaluated as acceptable.
  • 5 point The sample has excellent bulkiness as well as excellent appearance and resiliency when it has the same weight with reference to a sample with 3 point.
  • 4 point The sample has slightly high bulkiness when it has the same weight with reference to a sample with 3 point.
  • 3 point Standard level 2 point: The sample has relatively inferior bulkiness with reference to a sample with 3 point.
  • 1 point The sample has apparently inferior bulkiness with reference to a sample with 3 point.
  • the points of the five items, the smoothness, the softness, the moisture feel/moisturizing feel, the feel of elasticity/curl shape stability and the voluminousness, are added up.
  • the sample with the total points of 21 or more is excellent; the sample with the total points of from 20 to 17 is good; the sample with the total points of from 16 to 14 is ordinary; and the sample with the total points of 13 or less is inferior, and when the sample is excellent or good, it was evaluated as acceptable.
  • a polyvinyl chloride resin S 1001 (manufactured by Kaneka Corporation) were added 10 parts by weight of a chlorinated polyvinyl chloride resin H 438 (manufactured by Kaneka Corporation), 1 part by weight of a stabilizer, ALCAMIZER 1, which is a hydrotalcite heat stabilizer manufactured by Kyowa Chemical Industrial Co., Ltd., 0.5 part by weight of an ester-based lubricant, EW-100, manufactured by RIKEN VITAMIN Co., Ltd., 0.5 part by weight of a polyethylene wax-based luburicant, HW 400 P manufactured by Mitsui Chemicals, Inc., 0.4 part by weight of a ⁇ -diketone, 0.4 part by weight of a calcium soap-zinc soap, and 2 parts by weight of an epoxidized soybean oil, and the mixture was mixed and stirred in a Henschel mixer to produce a compound.
  • ALCAMIZER 1 which is a hydrotalcite heat stabilizer manufactured by Ky
  • a black pigment was added for controlling color.
  • a nozzle with 120 holes each having a cross-sectional area of 0.1 mm 2 was attached to a 40 mm ⁇ extruder. The holes were cocoon-shaped.
  • the compound was extruded and melt-spun at a cylinder temperature of 140 to 190° C. and a nozzle temperature of 180 ⁇ 15° C. under conditions providing good spinning property.
  • the extruded filaments were subjected to heat-treatment for about 0.5 to 1.5 seconds in a heating spinning tube (at 200 to 400° C. atmosphere and conditions providing good spinning property), which was provided directly under the nozzle, and they were subjected to spinning through first taking-up rolls.
  • an oil solution including a nonionic surfactant (a polyethylene oxide/polypropylene oxide copolymer with a molecular weight of about 800) and a cationic surfactant (an ammonium sulfite-based compound with a molecular weight of about 800), and an ester oil (oleyl oleate with a molecular weight of about 500) was added to the fiber in an amount of 0.5 omf %.
  • a nonionic surfactant a polyethylene oxide/polypropylene oxide copolymer with a molecular weight of about 800
  • a cationic surfactant an ammonium sulfite-based compound with a molecular weight of about 800
  • an ester oil oleyl oleate with a molecular weight of about 500
  • the yarns were stretched between two pairs of conical rolls provided in a chamber in which the temperature is controlled at 110° C., whereby about 35% of the mild heat treatment was performed for 2 minutes, and the multifilaments were taken up so that the monofilament therein had a fineness of about 77 to 81 dtex to produce a polyvinyl chloride-based resin fiber PVC-1.
  • a polyvinyl chloride-based fiber PVC-2 was produced in the same manner as in Preparation Example 1 except that the components of the oil solution were changed to a polyethylene oxide/polypropylene oxide copolymer having a molecular weight of 10000, the addition amount of the oil solution was changed to 0.2 omf %, the temperature of the mild heat treatment was changed to 130° C., and the relaxation speed was controlled so that it took 4 minutes to perform a 35% relaxation.
  • a polyvinyl chloride-based fiber PVC-3 was produced in the same manner as in Preparation Example 2 except that the relaxation speed was controlled so that it took 6 minutes to perform a 37% relaxation.
  • a polyvinyl chloride-based fiber PVC-4 was produced in the same manner as in Preparation Example 2 except that the relaxation speed was controlled so that it took 8 minutes to perform a 39% relaxation.
  • a polyvinyl chloride-based fiber PVC-5 was produced in the same manner as in Preparation Example 3 except that the components of the oil solution were changed to a nonionic surfactant (polyethylene oxide/polypropylene oxide copolymer with a molecular weight of 800), a cationic surfactant (ammonium sulfate-based compound with a molecular weight of about 800), and an ester oil (oleyl oleate with a molecular weight of about 500), and the addition amount of the oil solution was changed to 0.5 omf %.
  • a nonionic surfactant polyethylene oxide/polypropylene oxide copolymer with a molecular weight of 800
  • a cationic surfactant ammonium sulfate-based compound with a molecular weight of about 800
  • an ester oil oleyl oleate with a molecular weight of about 500
  • a polyvinyl chloride-based fiber PVC-6 was produced in the same manner as in Preparation Example 3 except that the components of the oil solution were changed to 75% by weight of a polyethylene oxide/polypropylene oxide copolymer with a molecular weight of 10000 and 25% by weight of amino-modified silicone oil with a kinematic viscosity of 1000 mm 2 /s, and the addition amount of the oil solution was changed to 0.2 omf %.
  • the resulting mixture was put in a twin-screw extruder, melt-kneaded at 280° C., and formed into pellets, which were dried to a moisture content of 100 ppm or less. Then, the molten polymer was discharged through spinning mouthpieces in a melt-spinning machine at 280° C. using an eye-glass-shaped nozzle. The resulting yarns were cooled in a water bath having a water temperature of 50° C., provided at a position of 30 mm below the mouthpieces, and they are wound at a speed of 100 m/minute to obtain unstretched yarns.
  • the obtained unstretched yarns were stretched 4 times in a warm water bath having a temperature of 80° C., and they were wound at a speed of 100 m/minute using heat rolls heated to 200° C.
  • the heat treatment was performed to obtain a polyester fiber (multifilament) having a monofilament fineness of about 65 dtex.
  • the physical properties of the fibers obtained in Preparation Examples 1 to 8 were shown in Table 1.
  • the polyvinyl chloride-based fibers (PVC-1 to PVC-6) and the thermoplastic resin fibers (TPR-1 and TPR-2) produced in Preparation Examples 1 to 8 were mixed in ratio shown in Table 2, which were subjected to hackling, thereby obtaining fiber bundles for artificial hair.
  • An amino-modified silicone oil (BY 16203 manufactured by Dow Corning Toray Co., Ltd., with a kinematic viscosity of 2000 mm 2 /s and a functional group equivalent of 1900 g/mol), a poly ethylene oxide/polypropylene oxide copolymer with a molecular weight of 10000, and pure water were mixed in a weight ratio of 0.5:0.5:9, and the mixture was stirred in a homogenizer to obtain an emulsion. After that, the emulsion was neutralized by added with acetic acid thereto, thereby producing a fiber-treating agent.
  • the fiber bundles from each of Examples 1 to 5 and 7 to 13, and Comparative Examples 2, 4, and 6 were immersed in this fiber-treating agent for 5 minutes, and then an excess amount of the fiber treating agent was removed therefrom by using an centrifugal dehydrator so that an amount of the agent supported on the fiber surface is 0.4 omf %. Then, the fiber bundles were separated into two fiber bundles, each bundle having a fineness of 1200,000 dtex. The fiber bundles, on which the fiber-treating agent was not supported, were also separated into two fiber bundles, each bundle having a fineness of 1200,000 dtex.
  • one of the fiber bundles were cut into a length of 35 cm, both ends thereof were tied with a string at a place of 5 cm from the end, and the bundle was heated at a temperature shown in Table 2 for one hour. The number of fiber bendings in the shrunk fiber bundle was counted. The remaining fiber bundle was then sewn using a sawing machine for wig to produce a hair extension having a length of 25 cm. This was wound around a pipe having a diameter of 35 mm, and heat-set was performed in a convecting dryer at a temperature described in Table 2 for one hour to impart a curl shape.
  • the hair extensions imparted with the curl shape were sewn on a net with 10 tiers at an interval of 1 cm to produce a commodity sample, and the quality as a commodity (the smoothness, the softness, the moisture feel/moisturizing feel, the feel of elasticity/curl shape stability, and the voluminousness) thereof was evaluated.
  • the results are shown in Table 2.
  • the fibers for artificial hair of the present invention had excellent texture and styling property, and in particular, when they were combined with a fiber having a high rigidity, applied with a silicone oil solution, or imparted with curls at a high temperature, they had qualities which were considerably beyond those of conventional products.
  • Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Mixed ratio PVC-1 of fibers (%) PVC-2 50 PVC-3 100 50 50 50 PVC-4 100 PVC-5 50 PVC-6 TPR-1 50 TPR-2 50 50 50 50 50 50 Fiber-treating agent Treated Treated Treated Treated Not Treated Treated Amino-modified silicone (C) treated Temperature at which curls 100 100 100 100 100 100 90 100 are imparted (° C.) Quality as Smoothness 3 5 5 4 5 5 5 5 5 commodity (Number of fiber (24) (7) (3) (14) 0 0 0 (3) bendings) Softness 4 4 4 4 3 5 3 Moisture 4 4 3 4 4 3 3 3 3 feel/moisturizing feel Feel of 4 4 3 3 4 4 3 4 elasticity/curl shape stability Voluminousness 4 4 5 4 4 4 4 4 General 19 21 20 19 21 19 20 19 evaluation Good Excellent Good Good Good Good Good Good Good Good Good Good Good Good Good Good Good Good Good Good Good Good Example Example Example Example Example Example Example Example Example Example 9 10 11 12 13

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US13/878,115 2010-10-06 2011-10-05 Fiber for artificial hair, and hair accessory formed from same Abandoned US20130298924A1 (en)

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US20210171754A1 (en) * 2018-06-07 2021-06-10 Denka Company Limited Fiber for artificial hair and hair decorating product
US20220018041A1 (en) * 2018-11-29 2022-01-20 Denka Company Limited Fiber for artificial hair and head accessory product

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CN104672490B (zh) * 2015-02-13 2018-03-20 杭州海一高分子材料有限公司 一种热稳定剂
JP2017122291A (ja) * 2016-01-06 2017-07-13 株式会社カネカ 人工毛髪用ポリエステル系繊維及びそれを含む頭飾製品
KR102079366B1 (ko) * 2018-11-30 2020-02-20 한국생산기술연구원 수퍼엔지니어링 플라스틱 수지 기반 난연성 가발사 및 이의 제조방법
CN109537099A (zh) * 2018-12-04 2019-03-29 宿迁广和新材料有限公司 一种多组分聚合物共混阻燃原丝及其制备方法
KR102222428B1 (ko) * 2019-10-31 2021-03-04 한국생산기술연구원 수퍼엔지니어링 플라스틱 수지 기반 난연성 흑색 가발사 및 이의 제조방법
WO2023127456A1 (ja) * 2021-12-28 2023-07-06 デンカ株式会社 毛髪用繊維及びその製造方法、繊維処理剤、並びに、頭髪装飾品
WO2023167056A1 (ja) * 2022-03-01 2023-09-07 デンカ株式会社 人工毛髪用繊維、繊維処理剤、及び人工毛髪用繊維の製造方法
WO2023195314A1 (ja) * 2022-04-06 2023-10-12 デンカ株式会社 人工毛髪用繊維及び頭髪装飾品
WO2023199690A1 (ja) * 2022-04-13 2023-10-19 デンカ株式会社 毛髪用繊維及び頭髪装飾品

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US20210171754A1 (en) * 2018-06-07 2021-06-10 Denka Company Limited Fiber for artificial hair and hair decorating product
US11807747B2 (en) * 2018-06-07 2023-11-07 Denka Company Limited Fiber for artificial hair and hair decorating product
US20220018041A1 (en) * 2018-11-29 2022-01-20 Denka Company Limited Fiber for artificial hair and head accessory product

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CN103124812A (zh) 2013-05-29
JP5700048B2 (ja) 2015-04-15
KR101743497B1 (ko) 2017-06-05
WO2012046748A1 (ja) 2012-04-12
KR20130138223A (ko) 2013-12-18
SG189286A1 (en) 2013-05-31
CN103124812B (zh) 2015-02-11
ZA201302535B (en) 2016-08-31
EP2626452A4 (en) 2014-03-19
JPWO2012046748A1 (ja) 2014-02-24

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