Fiber bundle for artificial hair and hair accessory product

Abstract

The problem addressed by the present invention is to provide a fiber bundle for artificial hair with which an appropriate degree of non-slipperiness and combability can both be achieved.　One embodiment of the present invention is a fiber bundle for artificial hair, the fiber bundle including at least two or more types of fibers for artificial hair in which different surface treatment compositions are attached to synthetic fibers. The coefficient of dynamic friction of the fiber bundle for artificial hair is 0.23-0.26.

Description

Artificial hair fiber bundles and hair accessories

[0001] The present invention relates to a fiber bundle for artificial hair and a hair accessory product.

[0002] Artificial hair is becoming increasingly important as an alternative to human hair in hair accessories such as wigs, hair accessories, hair bands, doll hair, etc. Materials for artificial hair fibers include acrylic resins, vinyl chloride resins, and polyester resins, and artificial hair fibers made from these resins are commercially available.

[0003] Patent Document 1 discloses a technology for treating base fibers with a specified fiber treatment agent, with the aim of providing fibers that have good luster and smoothness, do not creak, and have excellent volume, even when made of vinyl chloride resin.

[0004] Japanese Patent Application Laid-Open No. 2002-285470

[0005] From the viewpoint of preventing discomfort to the user, fiber bundles for artificial hair are required to have both moderate slipperiness and combability. Here, the slipperiness of a fiber bundle refers to the degree of slipperiness of the fibers when the fiber bundle is braided, etc. Also, the combability of a fiber bundle refers to the degree of ease with which fingers can be run through the fiber bundle when a hand comb is used.

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a fiber bundle for artificial hair that combines appropriate slip resistance and combability, and a hair accessory product including the fiber bundle for artificial hair.

[0007] As a result of intensive research, the inventors have found that the above-mentioned problems can be solved by having a dynamic friction coefficient within a specific range in an artificial hair fiber bundle containing two or more types of artificial hair fibers, and have completed the present invention.

[0008] The present invention provides the following: [1] An artificial hair fiber bundle comprising at least two or more types of artificial hair fibers having different surface treatment compositions adhered to synthetic fibers, the artificial hair fiber bundle having a dynamic friction coefficient of 0.23 to 0.26. [2] An artificial hair fiber bundle comprising at least two or more types of artificial hair fibers with different dynamic friction coefficients, the artificial hair fiber bundle including at least one type of artificial hair fiber having a dynamic friction coefficient of less than 0.25 and at least one type of artificial hair fiber having a dynamic friction coefficient of 0.25 or more. [3] The artificial hair fiber bundle according to [1], wherein each of the surface treatment compositions comprises at least one selected from the group consisting of a fatty acid skeleton-containing compound, a polyalkylene glycol, a silicone oil, a polyoxyalkylene alkyl ether, a mineral oil, a cationic surfactant, an alkyl alkylate, and a polyoxyethylene alkyl ether. [4] An artificial hair fiber bundle according to [1] or [3], wherein the amount of the surface treatment composition adhered to the artificial hair fiber is 0.05% by mass to 1.0% by mass based on the synthetic fiber. [5] An artificial hair fiber bundle according to any of [1] to [4], wherein the two or more types of artificial hair fibers are uniformly dispersed. [6] An artificial hair fiber bundle according to any of [1] to [5], wherein the standard deviation of the dynamic friction coefficient of the artificial hair fiber bundle when measured five times is 0.04 or less. [7] An artificial hair fiber bundle according to any of [1], [3], and [4], wherein the synthetic fiber comprises one or more selected from the group consisting of a vinyl chloride homopolymer, a vinyl chloride-acrylonitrile copolymer, polyethylene terephthalate, a polyamide resin, polypropylene, and an acrylonitrile-styrene copolymer. [8] A hair accessory product comprising the artificial hair fiber bundle according to any of [1] to [7]. [9] The hair accessory product according to [8], which includes a braid.

[0009] According to the present invention, it is possible to provide an artificial hair fiber bundle that combines appropriate slip resistance and combability, and a hair accessory product including the artificial hair fiber bundle.

[0010] The present invention will be described in detail below. However, the present invention is not limited to these descriptions. The features of the following embodiments can be combined with each other. Furthermore, each feature can be an invention independently.

[0011] <Explanation of Terms> In this specification, for example, the expression "X to Y" means that X or more and Y or less.

[0012] 1. Artificial Hair Fiber The artificial hair fiber according to this embodiment is preferably a synthetic fiber having a surface treatment composition adhered thereto.

[0013] 1.1 Synthetic Fibers As the synthetic fibers according to this embodiment, for example, resins such as vinyl chloride resins, polyester resins, polyamide resins, and polyolefin resins can be used. These resins may be used alone or in combination of two or more. Furthermore, if necessary, resin compositions containing additives may be added to these resins, and the resulting resin compositions may be spun to produce synthetic fibers.

[0014] 1.1.1 Vinyl chloride resin Examples of the vinyl chloride resin according to this embodiment include a vinyl chloride homopolymer, a chlorinated vinyl chloride homocopolymer, and a vinyl chloride copolymer. These vinyl chloride resins may be used alone or in combination of two or more.

[0015] Examples of vinyl chloride copolymers include copolymers of vinyl chloride and vinyl esters, such as vinyl chloride-vinyl acetate copolymer and vinyl chloride-vinyl propionate copolymer; copolymers of vinyl chloride and acrylic esters, such as vinyl chloride-butyl acrylate copolymer and vinyl chloride-2-ethylhexyl acrylate copolymer; copolymers of vinyl chloride and olefins, such as vinyl chloride-ethylene copolymer and vinyl chloride-propylene copolymer; and vinyl chloride-acrylonitrile copolymer.

[0016] The vinyl chloride resin according to this embodiment is preferably a vinyl chloride homopolymer or a vinyl chloride-acrylonitrile copolymer, which improves the processability of the synthetic fiber and also provides the artificial hair fiber bundle with a more suitable non-slip property and an improved feel.

[0017] 1.1.2 Polyester-Based Resin Examples of polyester-based resins according to this embodiment include aromatic polyester-based resins such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, and aliphatic polyester resins such as polylactic acid, polyhydroxybutyric acid, polycaprolactone, polybutylene succinate, polybutylene adipate, polyethylene succinate, polyglycolic acid, poly-3-hydroxypropionate, and poly-3-hydroxybutyrate. These polyester-based resins may be used alone or in combination of two or more.

[0018] The polyester resin according to this embodiment is preferably polyethylene terephthalate, as this resin improves the strength and heat resistance of the artificial hair fiber.

[0019] 1.1.3 Polyamide-Based Resin Examples of the polyamide-based resin according to this embodiment include nylon 6, nylon 66, nylon 11, nylon 12, nylon 6.10, nylon 6.12, and copolymers thereof. These polyamide-based resins may be used alone or in combination of two or more.

[0020] 1.1.4 Polyolefin Resin Examples of the polyolefin resin according to this embodiment include polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, and ethylene-propylene copolymer. These polyolefin resins may be used alone or in combination of two or more.

[0021] The polyolefin resin according to this embodiment is preferably polypropylene, since the specific gravity of the artificial hair fiber is low and the weight is light when used, resulting in an excellent feel when used.

[0022] 1.1.5 Other Resins Examples of other resins that may be used in this embodiment include copolymers of ethylene and vinyl alcohol, acrylonitrile-styrene copolymers, acrylonitrile-styrene-butadiene terpolymers, and ethylene-ethyl (meth)acrylate copolymers.

[0023] Among the above-mentioned resins, the resin according to the present embodiment preferably contains one or more selected from the group consisting of a vinyl chloride homopolymer, a vinyl chloride-acrylonitrile copolymer, polyethylene terephthalate, a polyamide resin, polypropylene, and an acrylonitrile-styrene copolymer. Such a resin improves the processability of the synthetic fiber, and furthermore, the fiber bundle for artificial hair has more appropriate slip resistance and an improved feel.

[0024] 1.2 Surface Treatment Composition The surface treatment composition according to this embodiment preferably contains, for example, a fatty acid skeleton-containing compound, a polyalkylene glycol, a surfactant, and other components.

[0025] The amount of the surface treatment composition deposited on the artificial hair fiber according to this embodiment is preferably 0.05 to 1.0% by mass, and more preferably 0.1 to 0.5% by mass, based on the synthetic fiber. The amount of the surface treatment composition deposited on the artificial hair fiber may be, for example, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or 1.0% by mass, based on the synthetic fiber, or may be within a range between any two of the values ​​exemplified here. When the lower limit of the amount of the surface treatment composition deposited on the artificial hair fiber is within this range, the artificial hair fiber bundle will have excellent combability. When the upper limit of the amount of the surface treatment composition deposited on the artificial hair fiber is within this range, the artificial hair fiber bundle will have more appropriate slip resistance.

[0026] 1.2.1 Fatty Acid Skeleton-Containing Compound Examples of the fatty acid skeleton-containing compound according to this embodiment include fatty acids, glycerides, and organic acid glycerides. The fatty acid skeleton-containing compound according to this embodiment preferably contains at least one of a glyceride and an organic acid glyceride. When such a fatty acid skeleton-containing compound is used, the artificial hair fiber bundle has more appropriate slip resistance and is easier to comb.

[0027] 1.2.1.1 Fatty Acids Examples of fatty acids according to this embodiment include saturated fatty acids such as stearic acid, palmitic acid, myristic acid, lauric acid, and capric acid, and unsaturated fatty acids such as oleic acid.

[0028] 1.2.1.2 Glycerides The glyceride according to this embodiment refers to a compound in which a fatty acid and one or more hydroxyl groups of glycerin are ester-bonded. Glycerides are also called monoglycerides, diglycerides, or triglycerides depending on the number of fatty acid bonds. Examples of glycerides according to this embodiment include monostearate glyceride, monopalmitate glyceride, monomyristate glyceride, monolaurate glyceride, monocaprate glyceride, and diglycerides and triglycerides thereof.

[0029] 1.2.1.3 Organic Acid Glycerides The organic acid glycerides according to this embodiment refer to compounds in which a fatty acid and an organic acid are ester-bonded to the hydroxyl group of glycerin. Examples of organic acids according to this embodiment include acetic acid, lactic acid, citric acid, succinic acid, and diacetyltartaric acid. Examples of organic acid glycerides according to this embodiment include citric acid monoglyceride, succinic acid monoglyceride, and lactic acid monoglyceride.

[0030] 1.2.2 Polyalkylene Glycol Examples of the polyalkylene glycol according to this embodiment include polyethylene glycol, polypropylene glycol, and polyethylene glycol-polypropylene glycol copolymer.

[0031] The average degree of polymerization of the polyalkylene glycol according to this embodiment is preferably 2 to 50, more preferably 3 to 40, even more preferably 4 to 30, and particularly preferably 4 to 20. The average degree of polymerization of the polyalkylene glycol may be, for example, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 35, 40, 45, or 50, or may be within a range between any two of the values ​​exemplified here. When the average degree of polymerization of the polyalkylene glycol is within this range, the fiber bundle for artificial hair has more appropriate slip resistance.

[0032] 1.2.3 Surfactant Examples of surfactants according to this embodiment include nonionic surfactants, cationic surfactants, and anionic surfactants. The surfactant according to this embodiment preferably includes at least one of a nonionic surfactant and a cationic surfactant. Use of such a surfactant provides the artificial hair fiber bundle with more appropriate slip resistance, improving combability, tactile feel, and stickiness resistance.

[0033] 1.2.3.1 Nonionic Surfactants Examples of nonionic surfactants according to this embodiment include polyoxyethylene fatty acid esters, polyoxyalkylene alkyl ethers, polyoxyethylene alkyl ethers, polyoxyethylene hydrogenated castor oil ethers, polyoxyethylene alkylphenyl ethers, sorbitan fatty acid esters, polyoxyethylene sorbitan fatty acid esters, sucrose fatty acid esters, glycerin fatty acid esters, polyoxyethylene polyoxypropylene block polymers, polyoxyethylene alkylamine ethers, and fatty acid alkanolamides.

[0034] The polyoxyethylene fatty acid ester according to the present embodiment is not particularly limited as long as it is a compound having a polyalkylene glycol skeleton and a fatty acid skeleton. Examples of the polyoxyethylene fatty acid ester according to the present embodiment include polyethylene glycol monostearate, polyethylene glycol distearate, polyethylene glycol monopalmitate, polyethylene glycol dipalmitate, polyethylene glycol monomyristate, polyethylene glycol monolaurate, and polyethylene glycol monocaprate.

[0035] The average degree of polymerization of the polyalkylene glycol skeleton in the polyoxyethylene fatty acid ester according to this embodiment is preferably 5 to 80, more preferably 10 to 70, even more preferably 15 to 60, and particularly preferably 20 to 50. The average degree of polymerization of the polyalkylene glycol skeleton may be, for example, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, or 80, or may be within a range between any two of the values ​​exemplified here. When the average degree of polymerization of the polyalkylene glycol skeleton is within this range, the fiber bundle for artificial hair has more appropriate slip resistance.

[0036] 1.2.3.2 Cationic Surfactants Examples of cationic surfactants according to this embodiment include quaternary ammonium salts having an oxyalkylene group, quaternary ammonium salts having an alkyl group, such as alkyltrimethylammonium salts, dialkyldimethylammonium salts, and alkyldimethylethylammonium salts, ammonium salts having an ester bond, such as stearoxymethylpyridinium salts, fatty acid triethanolamines, and fatty acid triethanolamine formates, and amine derivatives having an alkyl chain, such as polyoxyethylene alkylamines, N-alkylpropyleneamines, and N-alkylpolyethylenepolyamines.

[0037] 1.2.4 Other Components The surface treatment composition according to this embodiment may contain other components as needed, provided that the effects of the present invention are not impaired. Examples of other components include alkyl alkylates, silicone oils (e.g., amino-modified silicones), and mineral oils.

[0038] 1.2.4.1 Alkyl Alkylate Examples of the alkyl alkylate according to this embodiment include myristyl myristate, isopropyl myristate, octyl oleate, stearyl stearate, isopropyl palmitate, and octyl palmitate.

[0039] 1.2.5 Combinations of Surface Treatment Compositions As will be described later, the artificial hair fiber bundle according to this embodiment preferably comprises at least two or more types of artificial hair fibers in which different surface treatment compositions are adhered to synthetic fibers. Examples of combinations of surface treatment compositions include a combination of a surface treatment composition containing a fatty acid skeleton-containing compound, polyalkylene glycol, and a surfactant with a surface treatment composition containing a surfactant and silicone oil, and a surface treatment composition containing surfactants (preferably two or more types), or a combination of a surface treatment composition containing a surfactant (preferably two or more types) with a surface treatment composition containing a surfactant, alkyl alkylate, and mineral oil.

[0040] 1.3 Manufacturing Method of Artificial Hair Fiber The manufacturing method of the artificial hair fiber according to this embodiment is not particularly limited as long as it can adhere the surface treatment composition to the synthetic fiber. The manufacturing method of the artificial hair fiber according to this embodiment preferably includes a spinning step of spinning a resin constituting the synthetic fiber or a resin composition containing a resin and an additive to obtain a synthetic fiber, and an adhesion step of adhering the surface treatment composition to the obtained synthetic fiber.

[0041] 1.3.1 Spinning Process 1.3.1.1 Spinning Step The spinning process according to this embodiment includes at least a spinning step. A known spinning method can be used for the spinning step according to this embodiment. For example, a resin or resin composition can be extruded from a heated cylinder through a nozzle to perform melt spinning. As the extruder, a conventionally known extruder can be used, such as a single-screw extruder, a counter-rotating twin-screw extruder, or a conical twin-screw extruder.

[0042] The melt spinning conditions can be appropriately set depending on the type of resin and resin composition. For example, the cylinder temperature can be set to 150 to 190°C, and the nozzle temperature can be set to 180±15°C. The cross-sectional shape of the nozzle used in this case can be appropriately set depending on the cross-sectional shape of the artificial hair fiber to be produced.

[0043] The undrawn yarn melt-spun from the nozzle is introduced into a heating cylinder (for example, a heating cylinder temperature of 250°C) and instantaneously heat-treated, and can be taken up by a take-up machine installed directly below the nozzle (for example, about 4.5 m). During winding, the take-up speed can be adjusted so that the undrawn yarn has a desired thickness.

[0044] 1.3.1.2 Drawing Step The spinning process according to this embodiment may further include a drawing step. In the drawing step, the undrawn synthetic fiber obtained in the spinning step described above is drawn in a drawing machine to obtain a drawn synthetic fiber. As an example, in the drawing step, the undrawn synthetic fiber can be drawn 2 to 5 times in an air atmosphere at 90 to 110°C.

[0045] In the present invention, the term "synthetic fiber" refers to a synthetic fiber after spinning, and includes a synthetic fiber before the surface treatment composition is applied.

[0046] 1.3.2 Adhesion Step Any adhesion method can be used in the adhesion step according to this embodiment. For example, the surface treatment composition may be adhered to the synthetic fiber by a roll transfer method, or the synthetic fiber may be immersed in the surface treatment composition. The amount of the surface treatment composition adhered to the synthetic fiber according to this embodiment can be adjusted by adjusting the amount charged or the concentration of each component of the surface treatment composition other than the solvent.

[0047] 1.3.3 Heat Treatment Step The method for producing artificial hair fibers according to this embodiment may further include a heat treatment step. In the heat treatment step, the synthetic fibers before the application of the surface treatment composition or the artificial hair fibers after the application step may be heat-treated using a heat treatment machine. Therefore, the heat treatment step according to this embodiment may be carried out before or after the application step. As an example, in the heat treatment step, the synthetic fibers before the application of the surface treatment composition or the artificial hair fibers after the application of the surface treatment composition are heat-treated in an air atmosphere at 90 to 110°C so as to shrink by 0.5 to 0.99 times their original size, thereby thermally shrinking the entire length of the fibers and obtaining heat-treated synthetic fibers or heat-treated artificial hair fibers with the desired fineness.

[0048] 1.3.4 Gear Processing Step The method for producing artificial hair fibers according to this embodiment may further include a gear processing step. In this gear processing step, crimping can be achieved by passing the fiber bundle between two meshing, high-temperature gears. The material of the gears used in the gear processing step, the shape of the gear waves, and the number of gear fractions are not particularly limited. In the gear processing step, the shape of the resulting artificial hair fiber can be controlled by appropriately adjusting the depth of the gear wave grooves, the gear surface temperature, the processing speed, and the pressure conditions between the gears, taking into consideration the fiber material and fineness. These processing conditions are not particularly limited, but as an example, the depth of the gear wave grooves (gear pitch) can be 0.2 to 6 mm, preferably 0.5 to 5 mm, the gear surface temperature can be 30 to 100°C, preferably 40 to 80°C, and the processing speed can be 0.5 to 10 m / min, preferably 1.0 to 8.0 m / min.

[0049] In the present invention, "artificial hair fibers" refers to synthetic fibers after the surface treatment composition has been applied, and includes artificial hair fibers after application, artificial hair fibers after heat treatment, and artificial hair fibers after gear processing.

[0050] 2. Artificial Hair Fiber Bundle The artificial hair fiber bundle according to this embodiment contains at least two or more types of artificial hair fibers. Therefore, the artificial hair fiber bundle according to this embodiment can be obtained by a mixing step of mixing artificial hair fibers. Any mixing method can be used for the mixing step according to this embodiment. For example, two or more types of artificial hair fibers can be mixed by hackling. In this embodiment, the mixing step is preferably performed after the gear processing step.

[0051] The artificial hair fiber bundle according to this embodiment preferably contains at least two or more types of artificial hair fibers with different dynamic friction coefficients. The artificial hair fiber bundle according to this embodiment may contain three or more types of artificial hair fibers with different dynamic friction coefficients. The artificial hair fiber bundle according to this embodiment may contain, for example, two, three, four, or five (or two to five) types of artificial hair fibers with different dynamic friction coefficients. The dynamic friction coefficient of the artificial hair fiber can be adjusted by the components contained in the surface treatment composition and their amounts. Therefore, the artificial hair fiber bundle according to this embodiment preferably contains at least two or more types of artificial hair fibers with different surface treatment compositions adhered to the synthetic fibers. The artificial hair fiber bundle according to this embodiment may contain three or more types of artificial hair fibers with different surface treatment compositions adhered to the synthetic fibers. The artificial hair fiber bundle according to this embodiment may contain, for example, two, three, four, or five (or two to five) types of artificial hair fibers with different surface treatment compositions adhered to the synthetic fibers. In the following, preferred properties of the artificial hair fiber bundle according to this embodiment will be described, but for each measurement, it is preferable to use an artificial hair fiber bundle mixed with artificial hair fibers after gear processing.

[0052] 2.1 Dynamic Friction Coefficient The dynamic friction coefficient of the artificial hair fiber bundle according to this embodiment is preferably 0.23 to 0.26. The dynamic friction coefficient of the artificial hair fiber bundle may be, for example, 0.23, 0.24, 0.25, or 0.26, or may be within a range between any two of the values ​​exemplified here. The dynamic friction coefficient of the artificial hair fiber bundle can be, for example, the average value of the friction coefficients after sliding when a urethane terminal is moved from a position 100 mm from one end of an artificial hair fiber bundle having a length of 300 mm and a mass of 10 g toward the other end at a moving speed of 10 mm / sec, a moving distance of 45 mm, and a load of 200 g. The dynamic friction coefficient of the artificial hair fiber bundle can be adjusted by the components and their amounts contained in the surface treatment composition, or by mixing artificial hair fibers with different dynamic friction coefficients in appropriate proportions. When the dynamic friction coefficient of the artificial hair fiber bundle is within this range, the artificial hair fiber bundle can achieve both an appropriate level of slipperiness and combability.

[0053] The artificial hair fibers contained in the artificial hair fiber bundle according to this embodiment preferably contain at least two types of artificial hair fibers with different dynamic friction coefficients, and preferably contain one or more types of artificial hair fibers with a dynamic friction coefficient of less than 0.25 and one or more types of artificial hair fibers with a dynamic friction coefficient of 0.25 or more. The artificial hair fiber bundle according to this embodiment preferably contains, for example, one or more types of artificial hair fibers with a dynamic friction coefficient of 0.15 or more but less than 0.25 and one or more types of artificial hair fibers with a dynamic friction coefficient of 0.25 or more but 0.35. The ratio of the artificial hair fibers with a dynamic friction coefficient of less than 0.25 to the artificial hair fibers with a dynamic friction coefficient of 0.25 or more in the artificial hair fiber bundle according to this embodiment is, for example, 10:90 to 90:10, and preferably 30:70 to 70:30. The coefficient of dynamic friction of the artificial hair fiber can be measured in the same manner as above, for example, by bundling the same type of artificial hair fiber into an artificial hair fiber bundle having a length of 300 mm and a mass of 10 g. When the artificial hair fiber bundle has such a configuration, the artificial hair fiber bundle can achieve both an appropriate level of slipperiness and combability.

[0054] 2.2 Coefficient of Static Friction The coefficient of static friction of the artificial hair fiber bundle according to this embodiment is preferably 0.20 to 0.35. The coefficient of static friction of the artificial hair fiber bundle may be, for example, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, or 0.35, or may be within a range between any two of the values ​​exemplified here. The coefficient of static friction of the artificial hair fiber bundle can be, for example, the coefficient of friction at the start of sliding when measured using the same method as described above. When the coefficient of static friction of the artificial hair fiber bundle is in this range, the artificial hair fiber bundle can achieve both appropriate slip resistance and combability.

[0055] 2.3 Uniformity As described above, the artificial hair fiber bundle according to this embodiment contains at least two or more types of artificial hair fibers, and it is preferable that the two or more types of artificial hair fibers are uniformly dispersed. "Uniformly dispersed" refers to a state in which the various types of artificial hair fibers are well mixed in the artificial hair fiber bundle, and more specifically, a state in which the standard deviation value is low when the dynamic friction coefficient of the artificial hair fiber bundle is measured multiple times at different locations. When the dynamic friction coefficient of the artificial hair fiber bundle according to this embodiment is measured five times, the standard deviation is preferably 0.04 or less. When the dynamic friction coefficient of the artificial hair fiber bundle is measured five times, the standard deviation may be, for example, 0.04, 0.03, 0.02, 0.01, or 0, or may be within a range between any two of the values ​​exemplified here.

[0056] 2.4 Non-Slipperiness The artificial hair fiber bundle according to this embodiment preferably has a moderate non-slipperiness. The non-slipperiness of the artificial hair fiber bundle can be evaluated by the degree of non-slipperiness felt by a hair fiber processing technician (with at least 5 years of work experience) when braiding an artificial hair fiber bundle having a length of 600 mm and a mass of 120 g.

[0057] 2.5 Combability The artificial hair fiber bundle according to this embodiment preferably has excellent combability. The combability of the artificial hair fiber bundle can be evaluated, for example, by the degree of ease with which a hair fiber processing technician (with at least 5 years of work experience) feels when combing a 600 mm long, 120 g mass artificial hair fiber bundle with his or her fingers.

[0058] 3. Hair Accessory Product The hair accessory product according to this embodiment comprises the above-described artificial hair fiber bundle.

[0059] The artificial hair fiber bundle according to this embodiment can be used in hair accessory products, such as wigs, hair pieces, braids, hair extensions, doll hair, hair wigs, false hair, and hair bands. Hair accessory products obtained from the artificial hair fiber bundle according to this embodiment have suitable slip resistance and excellent combability.

[0060] The hair accessory product according to this embodiment can be applied to various styles, but is particularly suitable for braids including braids and twists.

[0061] The present invention will be described in more detail below with reference to examples. Note that the examples described below are representative examples of the present invention and should not be construed as narrowing the scope of the present invention.

[0062] <Preparation of synthetic fibers> The following synthetic fibers were prepared. Synthetic fiber A-1: ​​A fiber obtained by spinning from a nozzle by melt spinning using 70% by mass of polyvinyl chloride ("TH-700" manufactured by Taiyo Vinyl Corporation) and 30% by mass of acrylonitrile-styrene copolymer ("GR-AT-6S" manufactured by Denka Company Limited) as raw materials. Synthetic fiber A-2: A fiber obtained by spinning from a nozzle by melt spinning using polyvinyl chloride ("TH-700" manufactured by Taiyo Vinyl Corporation) as raw material. Synthetic fiber A-3: A fiber obtained by spinning from a nozzle by melt spinning using acrylonitrile-styrene copolymer ("GR-AT-6S" manufactured by Denka Company Limited) as raw material. Synthetic fiber A-4: A fiber obtained by spinning from a nozzle by melt spinning using polyethylene terephthalate ("J125S" manufactured by Mitsui Chemicals, Inc.) as raw material. Synthetic fiber A-5: A fiber obtained by spinning polypropylene (Sumitomo Noblen (registered trademark) S131 manufactured by Sumitomo Chemical Co., Ltd.) from a nozzle using a melt spinning method.

[0063] <Preparation of Surface Treatment Composition> Each surface treatment composition was obtained by mixing the components according to the formulation shown in Table 1. The components used to obtain the surface treatment compositions are as follows. Surface treatment composition B-6 was prepared by mixing surface treatment composition B-1 and surface treatment composition B-3 in a mass ratio of 1:1. (Fatty acid skeleton-containing compound) Glycerides: Monostearate glyceride: "EMALEX (registered trademark) GMS-B" manufactured by Nippon Emulsion Co., Ltd.

[0064] (Polyalkylene glycol) Polyalkylene glycol: Polyethylene glycol: "PEG-200" manufactured by Aoki Oil & Fat Co., Ltd., average degree of polymerization 4

[0065] (Surfactants) Nonionic surfactants: Polyethylene glycol monostearate: "EMALEX (registered trademark) 840" manufactured by Nippon Emulsion Co., Ltd. Polyoxyalkylene alkyl ether: "UNILUBE (registered trademark) 50MB-26" manufactured by NOF Corporation Polyoxyethylene alkyl ether 1: "Poly(oxyethylene) oleyl ether" manufactured by Nikko Chemicals Co., Ltd. Polyoxyethylene alkyl ether 2: "Brawnon (registered trademark) CH-330L" manufactured by Aoki Oil & Fat Industries Co., Ltd. Cationic surfactants: Quaternary ammonium salt type cationic surfactant: "F-20" manufactured by Yoshimura Oil Chemical Co., Ltd. Alkyltrimethylammonium chloride: "Catinal (registered trademark) DC-80" manufactured by Toho Chemical Industry Co., Ltd.

[0066] (Other components) Alkyl alkylate: Alkyl alkylate: Octyl palmitate manufactured by BOC Science Silicone oil: Amino-modified silicone: TCS382 manufactured by Yoshimura Oil Chemical Co., Ltd. Mineral oil: Mineral oil: Mineral oil manufactured by DKSH Japan Co., Ltd.

[0067]

[0068] <Preparation of Artificial Hair Fibers> After each synthetic fiber was stretched at 100°C, each surface treatment composition was applied to each synthetic fiber by roll transfer. The roll transfer conditions were a roll radius of 125 mm, the roll was immersed in the surface treatment composition up to a height of 20 mm from the bottom end of the roll, and the roll rotation speed was 0.2 to 8 m / min. A heat treatment step was then carried out at 110°C, and post-heat treatment artificial hair fibers with a single fineness of 20 to 100 dtex were obtained.

[0069] Using a gear machine ("NEW YAKI BRAID CRIMPING M / C-2.5mm" manufactured by SUNG JIN INDUSTRIAL CO., LTD.), gear processing was performed on the artificial hair fiber after each heat treatment under the conditions of a gear pitch of 2.5 mm, preheating at 90°C, a gear roll temperature of 90°C, and a gear roll rotation speed of 1 m / min, to obtain a gear-processed artificial hair fiber.

[0070] <Preparation of Artificial Hair Fiber Bundles> Artificial hair fiber bundles were obtained by thoroughly mixing the respective gear-processed artificial hair fibers in the proportions shown in Table 2 or Table 3. Furthermore, for Comparative Examples 1 to 5 and 8, artificial hair fiber bundles were obtained consisting of only one type of gear-processed artificial hair fiber. The artificial hair fiber bundles thus prepared were subjected to the tests and evaluations described below, and the results are shown in Tables 2 and 3.

[0071]

[0072]

[0073] (Dynamic friction coefficient) Of the above-mentioned artificial hair fiber bundles, for an evaluation artificial hair fiber bundle having a length of 300 mm and a mass of 10 g, a urethane terminal (tactile contact, finger model, manufactured by TRINITY-LAB) was moved from a position 100 mm from one end toward the other end at a moving speed of 10 mm / sec, a moving distance of 45 mm, and a load of 200 g, and the coefficient of friction after sliding was measured using a static and dynamic friction measuring device ("TL201Tt" manufactured by TRINITY-LAB). Five measurements were taken at different positions on each evaluation artificial hair fiber bundle, and the average value was used as the dynamic friction coefficient of each artificial hair fiber bundle.

[0074] (Static Friction Coefficient) When the above-mentioned measurements were carried out, the average value of the friction coefficients at the start of sliding was taken as the static friction coefficient of each artificial hair fiber bundle.

[0075] (Uniformity) The standard deviation of the dynamic friction coefficient when the above measurement was carried out was taken as the uniformity of each artificial hair fiber bundle.

[0076] (Non-slipperiness) Of the above-mentioned artificial hair fiber bundles, ten hair fiber processing technicians (with five or more years of work experience) braided an evaluation artificial hair fiber bundle having a length of 600 mm and a mass of 120 g, and evaluated the degree of non-slipperiness of the fibers as felt by the technicians using two ranks, "non-slip" or "slippery," according to the following criteria: 5: 10 technicians rated it as non-slip 4: 7 to 9 technicians rated it as non-slip 3: 5 to 6 technicians rated it as non-slip 2: 2 to 4 technicians rated it as non-slip 1: 1 technician or less rated it as non-slip

[0077] (Combability) Of the above-mentioned artificial hair fiber bundles, the artificial hair fiber bundles for evaluation, each 600 mm long and 120 g in mass, were evaluated by 10 hair fiber processing technicians (with at least 5 years of work experience) who evaluated the ease of combing their fingers through the bundle when combing it with their hands, using two ranks: "easy to comb" or "difficult to comb", and were evaluated according to the following criteria: 5: 10 people rated it as easy to comb 4: 7 to 9 people rated it as easy to comb 3: 5 to 6 people rated it as easy to comb 2: 2 to 4 people rated it as easy to comb 1: 1 person or less rated it as easy to comb

[0078] (Overall Evaluation) Based on the evaluation results of the slipperiness and combability described above, an overall evaluation was made according to the following criteria.

[0079]

Claims

1. A fiber bundle for artificial hair, comprising at least two or more types of fibers for artificial hair, each having a different surface treatment composition adhered to a synthetic fiber, and the dynamic friction coefficient of the fiber bundle for artificial hair is 0.23 to 0.

26.

2. A fiber bundle for artificial hair, comprising at least two types of fibers for artificial hair having different dynamic friction coefficients, the fiber bundle comprising at least one type of fiber for artificial hair having a dynamic friction coefficient of less than 0.25 and at least one type of fiber for artificial hair having a dynamic friction coefficient of 0.25 or more.

3. The fiber bundle for artificial hair according to claim 1, wherein the surface treatment composition contains at least one selected from the group consisting of a fatty acid skeleton-containing compound, a polyalkylene glycol, a silicone oil, a polyoxyalkylene alkyl ether, a mineral oil, a cationic surfactant, an alkyl alkylate, and a polyoxyethylene alkyl ether.

4. A fiber bundle for artificial hair according to claim 1 or claim 3, wherein the amount of the surface treatment composition adhered to the fiber for artificial hair is 0.05% by mass to 1.0% by mass based on the synthetic fiber.

5. The fiber bundle for artificial hair according to claim 1 or 2, wherein the two or more types of fibers for artificial hair are uniformly dispersed.

6. The fiber bundle for artificial hair according to claim 5, wherein when the dynamic friction coefficient of the fiber bundle for artificial hair is measured five times, the standard deviation is 0.04 or less.

7. The fiber bundle for artificial hair according to claim 1 or 3, wherein the synthetic fibers contain at least one selected from the group consisting of vinyl chloride homopolymer, vinyl chloride-acrylonitrile copolymer, polyethylene terephthalate, polyamide resin, polypropylene, and acrylonitrile-styrene copolymer.

8. A hair accessory product comprising the artificial hair fiber bundle according to claim 1 or 2.

9. A hair accessory product according to claim 8, comprising a braid.

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