Fiber for hair and hair accessory product

Abstract

To provide a fiber for hair having excellent combability, anti-stickiness property and softness after rinsing.SOLUTION: A fiber for hair has a base material fiber, an oil component, cationic surfactant, first nonionic surfactant, second nonionic surfactant, the oil component, cationic surfactant, first nonionic surfactant and second nonionic surfactant are present at least a part of the surface of the base material fiber, the oil component is at least one kind selected from the group consisting of triglyceride, fatty acid alkyl and aliphatic saturated hydrocarbon, the cationic surfactant has a carbon chain of carbon number 18 to 22, the first nonionic surfactant has a carbon chain of carbon number 10 to 20, an HLB value of the first nonionic surfactant is 14.0 to 19.0, the second nonionic surfactant has a carbon chain of carbon number 10 to 22, and an HLB value of the second nonionic surfactant is 6.0 or more and less than 14.0.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to hair fibers, hair accessories, and the like. [Background technology]

[0002] Hair fibers (fibers used for hair) can be used in hair accessories. Patent Document 1 below discloses a technique for treating base fibers with a fiber treating agent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-285470 A Summary of the Invention [Problem to be solved by the invention]

[0004] For hair fibers, in order to prevent users from feeling uncomfortable, it is required that the fiber bundle has excellent combability (ease of combing) and stickiness resistance (ease of reducing stickiness).In addition, since the softness of the fiber bundle may deteriorate when it is rinsed with water, it is also required that the hair fiber has excellent softness after rinsing with water.

[0005] An object of one aspect of the present invention is to provide a hair fiber that is excellent in combing property, stickiness resistance, and softness after rinsing with water.An object of another aspect of the present invention is to provide a hair accessory comprising such a hair fiber. [Means for solving the problem]

[0006] One aspect of the present invention is a fiber material comprising a base fiber, an oil, a cationic surfactant, a first nonionic surfactant, and a second nonionic surfactant, wherein the oil, the cationic surfactant, the first nonionic surfactant, and the second nonionic surfactant are present on at least a portion of a surface of the base fiber, the oil is at least one selected from the group consisting of triglycerides, fatty acid alkyls, and saturated aliphatic hydrocarbons, the cationic surfactant has a carbon chain having 18 to 22 carbon atoms, the first nonionic surfactant has a carbon chain having 10 to 20 carbon atoms, the first nonionic surfactant has an HLB value of 14.0 to 19.0, and the second nonionic surfactant has a carbon chain having 10 to 20 carbon atoms. the surfactant has a carbon chain having 10 to 22 carbon atoms; the second nonionic surfactant has an HLB value of 6.0 or more and less than 14.0; the oil content is 0.2 to 600 parts by mass relative to 100 parts by mass of the cationic surfactant; the oil content is 20 to 210 parts by mass relative to 100 parts by mass of the second nonionic surfactant; the cationic surfactant content is 3 to 20 parts by mass relative to 100 parts by mass of the first nonionic surfactant; and the total amount of the oil, the cationic surfactant, the first nonionic surfactant, and the second nonionic surfactant is 0.002 to 4% by mass based on the total amount of the hair fiber.

[0007] The hair fiber according to one aspect of the present invention is excellent in combability, resistance to stickiness, and softness after rinsing with water.

[0008] Another aspect of the present invention relates to a hair accessory comprising the above-mentioned hair fiber. Effect of the Invention

[0009] According to one aspect of the present invention, there is provided a hair fiber that is excellent in combability, resistance to stickiness, and softness after rinsing with water. According to another aspect of the present invention, there is provided a hair accessory including such a hair fiber. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail.

[0011] The term "A or more" in a numerical range means A and a range exceeding A. The term "A or less" in a numerical range means A and a range less than A. In the numerical ranges described in stages in this specification, the upper limit or lower limit of a numerical range in a certain stage can be arbitrarily combined with the upper limit or lower limit of a numerical range in another stage. In the numerical ranges described in this specification, the upper limit or lower limit of the numerical range may be replaced with a value shown in the examples. "A or B" may include either A or B, or may include both. Unless otherwise specified, the materials exemplified in this specification may be used alone or in combination of two or more. The content of each component in a composition means the total amount of the multiple substances present in the composition when multiple substances corresponding to each component are present in the composition, unless otherwise specified. The term "process" includes not only independent processes, but also processes that cannot be clearly distinguished from other processes as long as the intended effect of the process is achieved. "(Meth)acrylic acid" means at least one of acrylic acid and the corresponding methacrylic acid. The term "polyoxyalkylene group" and "oxyalkylene group" are collectively referred to as "(poly)oxyalkylene group." The same applies to other expressions containing "(poly)."

[0012] The hair fiber of this embodiment has a base fiber, oil, a cationic surfactant, a nonionic surfactant b1 (a first nonionic surfactant), and a nonionic surfactant b2 (a second nonionic surfactant), and the oil, the cationic surfactant, the nonionic surfactant b1, and the nonionic surfactant b2 are present on at least a portion of the surface of the base fiber.

[0013] The oil is at least one selected from the group consisting of triglycerides, fatty acid alkyls (fatty acid alkyl esters), and saturated aliphatic hydrocarbons, the cationic surfactant has a carbon chain with 18 to 22 carbon atoms, the nonionic surfactant b1 has a carbon chain with 10 to 20 carbon atoms, and the HLB value of the nonionic surfactant b1 is 14.0 to 19.0, the nonionic surfactant b2 has a carbon chain with 10 to 22 carbon atoms, and the HLB value of the nonionic surfactant b2 is 6.0 or more and less than 14.0. Hereinafter, the triglycerides, fatty acid alkyls, and saturated aliphatic hydrocarbons are collectively referred to as "oil S", and the cationic surfactant having a carbon chain with 18 to 22 carbon atoms is referred to as "cationic surfactant A".

[0014] The content of the oil S (total amount of triglyceride, fatty acid alkyl, and aliphatic saturated hydrocarbon; the same applies hereinafter) is 0.2 to 600 parts by mass relative to 100 parts by mass of the cationic surfactant A, the content of the oil S is 20 to 210 parts by mass relative to 100 parts by mass of the nonionic surfactant b2, the content of the cationic surfactant A is 3 to 20 parts by mass relative to 100 parts by mass of the nonionic surfactant b1, and the total amount of the oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2 is 0.002 to 4% by mass based on the total amount of the hair fiber.

[0015] The hair fiber according to the present embodiment is excellent in combability, stickiness resistance, and softness after rinsing with water. Regarding combability, the hair fiber according to the present embodiment can reduce the comb resistance to, for example, less than 265 gf (preferably, 260 gf or less, 200 gf or less, etc.) in the evaluation in the examples described later. One aspect of the hair fiber according to the present embodiment is also excellent in softness before rinsing with water.

[0016] The fiber treatment agent according to this embodiment is a fiber treatment agent for obtaining the hair fiber according to this embodiment, and contains oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2. According to the fiber treatment agent according to this embodiment, it is possible to obtain the hair fiber according to this embodiment, and it is possible to obtain a hair fiber excellent in combability, stickiness resistance, and softness after rinsing with water. One aspect of the fiber treatment agent according to this embodiment is excellent in dispersibility (dispersion stability), and in the evaluation in the examples described later, before mixing with water, solid components (mainly cationic surfactants) and liquid components that are not mixed with water are dispersed in a colloidal form overall (the fiber treatment agent is in a one-phase state).

[0017] The fiber for hair according to this embodiment can be used as hair (e.g., artificial hair) and can also be used to obtain hair (e.g., artificial hair). The fiber for hair according to this embodiment may be a fiber after drawing treatment or an undrawn fiber. The single fineness of the fiber for hair according to this embodiment may be 20 to 100 decitex after drawing treatment.

[0018] Examples of materials for the base fiber in the hair fiber according to this embodiment include vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, vinyl acetate resin (ethylene-vinyl acetate copolymer (EVA), etc.), acrylonitrile resin (excluding resins corresponding to vinyl chloride resin; acrylonitrile-butadiene rubber (NBR), acrylonitrile-butadiene-styrene resin (ABS), acrylonitrile-styrene copolymer (AS), etc.), thermoplastic polyurethane (TPU), polyester thermoplastic elastomer (TPEE), methyl methacrylate-butadiene-styrene resin (MBS), polymethyl methacrylate (PMMA), human hair material (keratin, etc.). The base fiber may contain at least one of these materials as a main component (main resin raw material). That is, the content of at least one of these materials may be 50% by mass or more, and may exceed 50% by mass, based on the total amount of the base fiber.

[0019] The vinyl chloride resin is a polymer having a structural unit derived from vinyl chloride, and is a polymer having vinyl chloride as a monomer unit. The vinyl chloride resin can be obtained by bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization, etc., and may be obtained by suspension polymerization from the viewpoint of excellent initial colorability of the fiber. The base fiber may contain a mixture of the vinyl chloride resin and a component capable of forming a polymer alloy with the vinyl chloride resin (e.g., an acrylonitrile-styrene copolymer).

[0020] Examples of vinyl chloride resins include homopolymers of vinyl chloride (homopolymers, polyvinyl chloride), copolymers of vinyl chloride and other monomers, and mixtures of these may be used. Examples of copolymers of vinyl chloride and other monomers include copolymers of vinyl chloride and vinyl esters (vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl propionate copolymer, etc.); copolymers of vinyl chloride and (meth)acrylic acid compounds ((meth)acrylic acid, (meth)acrylic acid esters, etc.) (vinyl chloride-butyl acrylate copolymer, vinyl chloride-2-ethylhexyl acrylate copolymer, etc.); copolymers of vinyl chloride and olefins (vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, etc.); vinyl chloride-acrylonitrile copolymer (modacrylic), etc. The vinyl chloride resin may not have a structural unit derived from a (meth)acrylic acid compound. In the copolymer, the content of a monomer other than vinyl chloride can be determined according to the required quality such as moldability, thread properties, etc. From the viewpoint of obtaining excellent combing properties, softness (before and after rinsing with water), and ease of weaving, the vinyl chloride resin may contain at least one selected from the group consisting of vinyl chloride homopolymers and vinyl chloride-acrylonitrile copolymers.

[0021] Examples of polyester resins include polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene-2,6-naphthalate, polymethylene terephthalate, and glycol-modified polyethylene terephthalate (PETG).

[0022] Examples of polyamide resins include nylon 6, nylon 66, nylon 11, nylon 12, nylon 6 / 10, and nylon 6 / 12.

[0023] Examples of polyolefin resins include polyethylene (PE) and polypropylene (PP).

[0024] From the viewpoint of obtaining excellent combability, stickiness resistance, softness (before and after rinsing with water), and ease of weaving, the base fiber may contain at least one selected from the group consisting of vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, acrylonitrile resin, and human hair material, may contain at least one selected from the group consisting of vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, acrylonitrile-styrene copolymer, and human hair material, may contain at least one selected from the group consisting of vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, and acrylonitrile-styrene copolymer, and may 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.

[0025] The base fiber may contain a material (hereinafter referred to as "artificial hair material") different from a human hair material (e.g., keratin). Incidentally, users of hair accessories having base fiber containing artificial hair material are looking for handleability (e.g., braiding ability) or texture (e.g., softness, combability) similar to human hair. However, even if base fiber containing artificial hair material is treated with ingredients contained in hair care products (e.g., hair conditioner, hair treatment, etc.) used to improve human hair, the handleability or texture may not be improved to be similar to human hair. Therefore, in order to improve base fiber containing artificial hair material, a method suitable for artificial hair material is required. In contrast, in one aspect of the hair fiber according to the present embodiment, even when an artificial hair material is used, excellent handleability (e.g., braiding ability) can be obtained while obtaining excellent texture.

[0026] The content of the artificial hair material or human hair material in the base fiber may be 50% by mass or more, more than 50% by mass, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, or 99% by mass or more based on the total mass of the base fiber. The base fiber may be composed only of an artificial hair material or a human hair material (substantially 100% by mass of the base fiber is an artificial hair material or a human hair material).

[0027] The content of vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, or acrylonitrile resin in the base fiber may be 50% by mass or more, more than 50% by mass, 60% by mass or more, 70% by mass or more, 80% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, or 99% by mass or more based on the total mass of the base fiber. The base fiber may be made of only vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, or acrylonitrile resin (substantially 100% by mass of the base fiber is vinyl chloride resin, polyester resin, polyamide resin, polyolefin resin, or acrylonitrile resin). The content of keratin in the base fiber may be 50% by mass or more, more than 50% by mass, 60% by mass or more, 70% by mass or more, 80% by mass or more, or 90% by mass or more based on the total mass of the base fiber.

[0028] The average fineness of the base fiber may be 300 decitex or less, 200 decitex or less, or 100 decitex or less when unstretched, from the viewpoint of being able to reduce the stretch ratio in order to obtain finer hair fibers.

[0029] The hair fiber according to this embodiment has an oil S, a cationic surfactant A, a nonionic surfactant b1, and a nonionic surfactant b2 present on at least a portion of the surface of the base fiber.

[0030] The cationic surfactant A has a carbon chain having 18 to 22 carbon atoms (hereinafter referred to as "carbon chain A"); the nonionic surfactant b1 has a carbon chain having 10 to 20 carbon atoms (hereinafter referred to as "carbon chain b1"); and the nonionic surfactant b2 has a carbon chain having 10 to 22 carbon atoms (hereinafter referred to as "carbon chain b2"). The "carbon chain" is a molecular chain formed by successively bonding carbon atoms, for example, a "carbon chain having 18 to 22 carbon atoms" is a molecular chain formed by successively bonding 18 to 22 carbon atoms. The "carbon chain" may be linear, branched, or cyclic. The "carbon chain" may or may not have an unsaturated bond.

[0031] In the hair fiber and fiber treatment agent according to this embodiment, at least one cationic surfactant A having a carbon chain A, at least one nonionic surfactant b1 having a carbon chain b1, and at least one nonionic surfactant b2 having a carbon chain b2 are present. The oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2 may be present at the same location or different locations on the surface of the base fiber.

[0032] The oil S is at least one selected from the group consisting of triglycerides, fatty acid alkyls, and saturated aliphatic hydrocarbons. The oil S may be in an embodiment containing triglycerides, in an embodiment containing fatty acid alkyls, or in an embodiment containing saturated aliphatic hydrocarbons.

[0033] The oil S may contain an oil (triglyceride, fatty acid alkyl, or aliphatic saturated hydrocarbon) having an iodine value in the following ranges: From the viewpoint of easily obtaining excellent combability and odor resistance, the iodine value may be 200 or less, 190 or less, 180 or less, 170 or less, less than 170, 165 or less, 160 or less, 150 or less, 140 or less, 130 or less, 120 or less, 100 or less, 90 or less, 80 or less, 70 or less, 50 or less, 30 or less, 20 or less, 15 or less, 11 or less, 10 or less, 7 or less, 5 or less, or 4 or less. The iodine value may be more than 0, 0.1 or more, 4 or more, 5 or more, 7 or more, 10 or more, 11 or more, 15 or more, 20 or more, 30 or more, 50 or more, 70 or more, 80 or more, 90 or more, 100 or more, 120 or more, 130 or more, 140 or more, 150 or more, 160 or more, 165 or more, or 170 or more. From these viewpoints, the iodine value may be more than 0 and 200 or less, 5 to 200, 70 to 200, 100 to 200, more than 0 and 165 or less, 5 to 165, 70 to 165, 100 to 165, more than 0 and 100 or less, 5 to 100, 70 to 100, more than 0 and 70 or less, 5 to 70, or more than 0 and 5 or less. The iodine value can be measured in accordance with the Quasi-Drug Raw Materials Standards 2021 (External Item Standards 2021).

[0034] Triglycerides are compounds having a structure in which one molecule of glycerol is linked by an ester bond to three molecules of fatty acid. Triglycerides may include compounds having a structure derived from a fatty acid that does not have an unsaturated bond, and may include compounds having a structure derived from a fatty acid that has a carbon chain containing an unsaturated bond.

[0035] From the viewpoint of easily obtaining excellent combing ease and odor resistance, the number of unsaturated bonds in the carbon chain of a fatty acid having an unsaturated bond may be 5 or less, 4 or less, 3 or less, or 2 or less. The number of unsaturated bonds may be 1 or more, 2 or more, or 3 or more. From these viewpoints, the number of unsaturated bonds may be 1 to 5, 1 to 4, 1 to 3, 1 to 2, 2 to 5, 2 to 4, 2 to 3, 3 to 5, or 3 to 4.

[0036] The triglyceride may contain a compound having a structure derived from a fatty acid having a carbon number in the following range. From the viewpoint of easily obtaining excellent combability, the carbon number of the fatty acid may be 30 or less, 28 or less, 26 or less, 24 or less, 22 or less, 20 or less, 18 or less, 16 or less, 14 or less, 12 or less, 10 or less, or 8 or less. From the viewpoint of easily obtaining excellent softness (before and after rinsing with water), the carbon number of the fatty acid may be 1 or more, 2 or more, 4 or more, 6 or more, 8 or more, 10 or more, 12 or more, 14 or more, 16 or more, or 18 or more. From these viewpoints, the carbon number of the fatty acid may be 1 to 30, 8 to 30, 12 to 30, 18 to 30, 1 to 18, 8 to 18, 12 to 18, 1 to 12, 8 to 12, or 1 to 8.

[0037] Examples of triglycerides include coconut oil, olive oil (olive fruit oil), sunflower oil (sunflower seed oil), rosehip oil (canina rose fruit oil), rice oil, corn oil, canola oil, rice bran oil, soybean oil, soybean white refined oil, safflower oil, sesame oil, cottonseed oil, rapeseed oil, rapeseed white refined oil, peanut oil, grapeseed oil, perilla oil, evening primrose oil, jojoba oil, wheat germ oil, hemp seed oil, tea seed oil, palm oil, palm kernel oil, fish oil, whale oil, beef tallow, lard, etc. The triglyceride may contain at least one selected from the group consisting of coconut oil, olive oil, sunflower oil, and rosehip oil, from the viewpoint of easy obtaining excellent combability and softness (before and after rinsing with water).

[0038] The fatty acid alkyl group is a compound having a structure obtained by dehydration condensation of a fatty acid and an aliphatic alcohol. The fatty acid alkyl group may include at least one selected from the group consisting of saturated fatty acid alkyl groups and unsaturated fatty acid alkyl groups. The fatty acid alkyl group may include a compound having a structure derived from a monocarboxylic acid (fatty acid), or may include a compound having a structure derived from a dicarboxylic acid (fatty acid).

[0039] The fatty acid alkyl may include a compound having a structure derived from a fatty acid having a carbon number in the following range. From the viewpoint of easily obtaining excellent combability and softness (before and after rinsing with water), the carbon number of the fatty acid may be 6 or more, 8 or more, 10 or more, 12 or more, 14 or more, 16 or more, or 18 or more. From the viewpoint of easily obtaining excellent combability, the carbon number of the fatty acid may be 30 or less, 26 or less, 22 or less, 20 or less, 18 or less, 16 or less, or 14 or less. From these viewpoints, the carbon number of the fatty acid may be 6 to 30, 12 to 30, 14 to 30, 18 to 30, 6 to 20, 12 to 20, 14 to 20, 18 to 20, 6 to 18, 12 to 18, 14 to 18, 6 to 14, or 12 to 14.

[0040] The fatty acid alkyl group may include a compound having a structure derived from an aliphatic alcohol having a carbon number in the following range. From the viewpoint of easily obtaining excellent combability and softness (before and after rinsing with water), the carbon number of the aliphatic alcohol may be 1 or more, 2 or more, 3 or more, 4 or more, 5 or more, 6 or more, 7 or more, or 8 or more. From the viewpoint of easily obtaining excellent combability, the carbon number of the aliphatic alcohol may be 12 or less, 10 or less, 9 or less, 8 or less, 7 or less, 6 or less, 5 or less, 4 or less, or 3 or less. From these viewpoints, the carbon number of the aliphatic alcohol may be 1 to 12, 3 to 12, 8 to 12, 1 to 8, 3 to 8, or 1 to 3.

[0041] Examples of fatty acid alkyl groups include alkyl laurates such as methyl laurate, ethyl laurate, propyl laurate, isopropyl laurate, butyl laurate, hexyl laurate, heptyl laurate, octyl laurate, ethylhexyl laurate, decyl laurate, dodecyl laurate, myristyl laurate, cetyl laurate, hexyldecyl laurate, octyldodecyl laurate, and caprylyl laurate; methyl myristate, ethyl myristate, propyl myristate, and myristyl laurate. myristates such as isopropyl myristate, butyl myristate, hexyl myristate, octyl myristate, ethylhexyl myristate, dodecyl myristate, myristyl myristate, cetyl myristate, isocetyl myristate, hexyldecyl myristate, octyldodecyl myristate, and myristyl myristate; alkyl myristates such as methyl palmitate, ethyl palmitate, propyl palmitate, isopropyl palmitate, butyl palmitate, hexyl palmitate, and methyl palmitate. Alkyl palmitates such as heptyl, octyl palmitate, ethylhexyl palmitate, dodecyl palmitate, myristyl palmitate, cetyl palmitate, hexyldecyl palmitate, and octyldodecyl palmitate; methyl stearate, ethyl stearate, propyl stearate, isopropyl stearate, butyl stearate, hexyl stearate, octyl stearate, ethylhexyl stearate, dodecyl stearate, myristyl stearate, cetyl stearate, Examples of the alkyl stearates include hexyldecyl stearate, octyldodecyl stearate, decyl isostearate, and methylheptyl isostearate; and alkyl oleates such as methyl oleate, ethyl oleate, propyl oleate, isopropyl oleate, butyl oleate, hexyl oleate, octyl oleate, ethylhexyl oleate, dodecyl oleate, myristyl oleate, cetyl oleate, hexyldecyl oleate, and octyldodecyl oleate.The fatty acid alkyl may include at least one selected from the group consisting of alkyl laurate, alkyl myristate, alkyl palmitate, alkyl stearate, and alkyl oleate, from the viewpoint of easily obtaining excellent combability and softness (before and after rinsing with water), and may include at least one selected from the group consisting of alkyl myristate and alkyl oleate. The fatty acid alkyl may include alkyl myristate and isopropyl myristate, from the viewpoint of easily obtaining excellent combability. The fatty acid alkyl may include alkyl oleate and octyl oleate, from the viewpoint of easily obtaining excellent softness (before and after rinsing with water).

[0042] The carbon number of the carbon chain A in the cationic surfactant A is 18 to 22. When the carbon number of the carbon chain A is 18 or more, excellent softness (after rinsing with water) can be obtained. Although the reason is not limited, it is presumed that when the carbon number of the carbon chain A is 18 or more, the cationic surfactant A is less likely to be washed off when rinsing with water, thereby obtaining excellent softness (after rinsing with water). When the carbon number of the carbon chain A is 22 or less, excellent combability and anti-stickiness can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained.

[0043] From the viewpoint of easily obtaining excellent softness (before and after rinsing with water), the number of carbon atoms in the carbon chain A may be 19 or more, 20 or more, or 21 or more. From the viewpoint of easily obtaining excellent combing ease and stickiness resistance, the number of carbon atoms in the carbon chain A may be 21 or less, 20 or less, or 19 or less. From these viewpoints, the number of carbon atoms in the carbon chain A may be 18 to 20, or 20 to 22.

[0044] Cationic surfactant A is a surfactant having a cationic hydrophilic group, and is a surfactant having a hydrophilic group that dissociates into ions in water to become a cation. Examples of cationic surfactant A include quaternary ammonium salts, amine salts, pyridium salts, imidazolinium salts, etc. Examples of salts include halide salts, such as chloride salts, bromide salts, and iodide salts.

[0045] Examples of the quaternary ammonium salt include aliphatic quaternary ammonium salts, aromatic quaternary ammonium salts (excluding compounds corresponding to heterocyclic quaternary ammonium salts), heterocyclic quaternary ammonium salts, etc. Examples of the amine salt include aliphatic amine salts, etc., including monoalkylamine salts, dialkylamine salts, trialkylamine salts, etc.

[0046] From the viewpoint of easily achieving excellent combing properties, resistance to stickiness, and softness (before and after rinsing with water), the cationic surfactant A may contain a quaternary ammonium salt, and may contain a quaternary ammonium salt that is a chloride salt (a quaternary ammonium salt having a chloride ion as a counter anion).

[0047] From the viewpoint of easily achieving excellent combing properties, resistance to stickiness, and softness (before and after rinsing with water), the cationic surfactant A may contain a compound having a cation having a structure represented by the following general formula (1), or may contain a quaternary ammonium salt having a cation having a structure represented by the following general formula (1).

[0048] [ka] [In formula (1), R 11 represents a group containing a carbon chain having 18 to 22 carbon atoms, R 12 , R 13 and R 14 each independently represents a monovalent group.

[0049] R 11 Examples of R include alkyl groups having 18 to 22 carbon atoms. 12 , R 13 and R 14 Examples of the monovalent group include a hydrogen atom and a group containing a carbon atom (which may contain atoms other than carbon atoms). 12 , R 13 and R 14 may each independently be a group containing carbon atoms.

[0050] Examples of the group containing carbon atoms include an alkyl group, an aryl group, a carboxy group, a carboxylate group, and an alkoxy group. From the viewpoint of easily obtaining excellent combability, stickiness resistance, softness (before and after rinsing with water), and dispersibility of the fiber treatment agent, the number of carbon atoms of the alkyl group may be 1 to 10, 1 to 8, 1 to 6, 1 to 5, 1 to 4, 1 to 3, or 1 to 2. Examples of the aryl group include a benzyl group, a phenyl group, and a naphthyl group. From the viewpoint of easily obtaining excellent stickiness resistance and softness (before and after rinsing with water), the aryl group may be a benzyl group.

[0051] From the viewpoints of easily obtaining excellent combing properties, resistance to stickiness, softness (before and after rinsing with water), and dispersibility of the fiber treatment agent, the cationic surfactant A may satisfy at least one of the following: The cationic surfactant A is represented by the general formula (1) R 12 and R 13 In the general formula (1), R 12 , R 13 and R 14 At least one selected from the group consisting of: a quaternary ammonium salt in which the at least one group is an alkyl group or an aryl group. The cationic surfactant A is represented by the general formula (1) R 12 and R 13 In the general formula (1), R 12 , R 13 and R 14 At least one selected from the group consisting of: The cationic surfactant A is represented by the general formula (1) R 12 and R 13 may include a quaternary ammonium salt in which R in the general formula (1) is a methyl group. 12 , R 13 and R 14may include a quaternary ammonium salt in which R in the general formula (1) is a methyl group. 12 and R 13 is a methyl group and R 14 may include quaternary ammonium salts in which is a benzyl group.

[0052] From the viewpoint of easily obtaining excellent combing properties, resistance to stickiness, softness (before and after rinsing with water), and dispersibility of a fiber treatment agent, the cationic surfactant A may comprise at least one selected from the group consisting of stearyl trimethyl ammonium chloride, oleyl trimethyl ammonium chloride, nonadecyl trimethyl ammonium chloride, icosyl trimethyl ammonium chloride, henicosyl trimethyl ammonium chloride, behenyl trimethyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride, oleyl dimethyl benzyl ammonium chloride, nonadecyl dimethyl benzyl ammonium chloride, icosyl dimethyl benzyl ammonium chloride, henicosyl dimethyl benzyl ammonium chloride, and behenyl dimethyl benzyl ammonium chloride, and may comprise at least one selected from the group consisting of stearyl trimethyl ammonium chloride, stearyl dimethyl benzyl ammonium chloride, and behenyl trimethyl ammonium chloride.

[0053] The number of carbon atoms in the carbon chain b1 in the nonionic surfactant b1 is 10 to 20. When the number of carbon atoms in the carbon chain b1 is 10 or more, excellent combability, resistance to stickiness, and softness (after rinsing with water) can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained. When the number of carbon atoms in the carbon chain b1 is 20 or less, excellent combability and resistance to stickiness can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained.

[0054] From the viewpoints of easily obtaining excellent softness (before and after rinsing with water) and dispersibility of a fiber treatment agent, the number of carbon atoms in the carbon chain b1 may be 12 or more, 14 or more, 16 or more, or 18 or more. From the viewpoints of easily obtaining excellent combing ease, anti-stickiness, and dispersibility of a fiber treatment agent, the number of carbon atoms in the carbon chain b1 may be 18 or less, 16 or less, 14 or less, or 12 or less. From these viewpoints, the number of carbon atoms in the carbon chain b1 may be 10 to 18, 10 to 16, 10 to 14, 10 to 12, 12 to 20, 12 to 18, 12 to 16, 12 to 14, 16 to 20, 16 to 18, or 18 to 20.

[0055] The carbon number of the carbon chain b2 in the nonionic surfactant b2 is 10 to 22. When the carbon number of the carbon chain b2 is 10 or more, excellent stickiness resistance can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained. When the carbon number of the carbon chain b2 is 22 or less, excellent combability and stickiness resistance can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained.

[0056] From the viewpoints of easily obtaining excellent softness (before and after rinsing with water) and dispersibility of a fiber treatment agent, the number of carbon atoms in the carbon chain b2 may be 12 or more, 14 or more, 16 or more, 18 or more, or 20 or more. From the viewpoints of easily obtaining excellent combing ease, anti-stickiness, and dispersibility of a fiber treatment agent, the number of carbon atoms in the carbon chain b2 may be 20 or less, 18 or less, 16 or less, 14 or less, or 12 or less. From these viewpoints, the number of carbon atoms in the carbon chain b2 may be 10 to 20, 10 to 18, 10 to 16, 10 to 12, 12 to 22, 12 to 20, 12 to 18, 12 to 16, 16 to 22, 16 to 20, 16 to 18, 18 to 22, 18 to 20, or 20 to 22.

[0057] The nonionic surfactant b1 and the nonionic surfactant b2 are surfactants that do not have a group that dissociates into ions in water. At least one selected from the group consisting of the nonionic surfactant b1 and the nonionic surfactant b2 may satisfy at least one of the following from the viewpoint of easily obtaining excellent combability, anti-stickiness, softness (before and after rinsing with water), and dispersibility of the fiber treatment agent. At least one selected from the group consisting of nonionic surfactant b1 and nonionic surfactant b2 (for example, nonionic surfactant b1 and nonionic surfactant b2) may include at least one selected from the group consisting of polyoxyalkylene alkyl ethers, fatty acid monoalkanolamides, fatty acid dialkanolamides, polyoxyalkylene dialkylamines, dipolyoxyalkylene alkylamines, and polyoxyalkylene fatty acid esters, and may include polyoxyalkylene alkyl ethers. The nonionic surfactant b1 may contain a polyoxyalkylene alkyl ether, and may contain at least one selected from the group consisting of polyoxyethylene decyl ether, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, and polyoxyethylene stearyl ether. The nonionic surfactant b2 may contain a polyoxyalkylene alkyl ether, and may contain at least one selected from the group consisting of polyoxyethylene decyl ether, polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, and polyoxyethylene behenyl ether. At least one selected from the group consisting of nonionic surfactant b1 and nonionic surfactant b2 may include at least one selected from the group consisting of fatty acid monoalkanolamides and fatty acid dialkanolamides, and may include coconut oil fatty acid diethanolamide. At least one selected from the group consisting of nonionic surfactant b1 and nonionic surfactant b2 may include at least one selected from the group consisting of polyoxyalkylene dialkylamines and dipolyoxyalkylene alkylamines, and may include dipolyoxyethylene laurylamine. At least one selected from the group consisting of nonionic surfactant b1 and nonionic surfactant b2 may contain a polyoxyalkylene fatty acid ester, or may contain a polyoxyethylene laurate.

[0058] At least one selected from the group consisting of nonionic surfactant b1 and nonionic surfactant b2 (for example, nonionic surfactant b1 and nonionic surfactant b2) may comprise at least one selected from the group consisting of ether compounds, ester compounds, amide compounds, and amine compounds, from the viewpoint of easily obtaining excellent combing properties, resistance to stickiness, softness (before and after rinsing with water), and dispersibility of the fiber treatment agent, and may comprise at least one compound selected from the group consisting of a structure represented by the following general formula (2a), a structure represented by the following general formula (2b), a structure represented by the following general formula (2c), and a structure represented by the following general formula (2d).

[0059] [ka] [In the formula, R 21a , R 21b , R 21c and R 21d each independently represents a hydrophobic portion including a carbon chain having 10 to 20 carbon atoms (carbon chain b1) in the nonionic surfactant b1, represents a hydrophobic portion including a carbon chain having 10 to 22 carbon atoms (carbon chain b2) in the nonionic surfactant b2, R 22a , R 22b , R 22c , R 23c and R 22d Each independently represents a hydrophilic portion, and R 23d indicates a hydrophobic or hydrophilic portion.

[0060] The hydrophobic portion may be a hydrocarbon group such as an alkyl group, etc. The hydrocarbon group (such as an alkyl group) may be linear, branched, or cyclic.

[0061] The hydrophilic portion may be a group having a hydrophilic group or may be a hydrophilic group. Examples of the hydrophilic group include a (poly)oxyalkylene group, a hydroxy group, a carboxy group, a carboxylate group, a phosphoric acid group, a sulfonic acid group, and a sulfonate group. Examples of the (poly)oxyalkylene group include a (poly)oxyethylene group and a (poly)oxypropylene group.

[0062] From the viewpoint of easily obtaining excellent combability, stickiness resistance, softness (before and after rinsing with water), and dispersibility of a fiber treatment agent, the nonionic surfactant b1 may contain at least one selected from the group consisting of polyoxyethylene decyl ether, polyoxyethylene lauryl ether, polyoxyethylene laurate, dipolyoxyethylene laurylamine, polyoxyethylene cetyl ether, coconut oil fatty acid diethanolamide, and polyoxyethylene stearyl ether. From the viewpoint of easily obtaining excellent combability, stickiness resistance, softness (before and after rinsing with water), and dispersibility of a fiber treatment agent, the nonionic surfactant b2 may contain at least one selected from the group consisting of polyoxyethylene decyl ether, polyoxyethylene lauryl ether, polyoxyethylene laurate, dipolyoxyethylene laurylamine, polyoxyethylene cetyl ether, coconut oil fatty acid diethanolamide, polyoxyethylene stearyl ether, and polyoxyethylene behenyl ether.

[0063] The HLB value of the nonionic surfactant b1 is 14.0 to 19.0. That is, in the hair fiber and fiber treatment agent according to the present embodiment, at least one nonionic surfactant b1 having an HLB value of 14.0 to 19.0 is present. When the HLB value of the nonionic surfactant b1 is 14.0 or more, excellent stickiness resistance and softness (after rinsing with water) can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained. When the HLB value of the nonionic surfactant b1 is 19.0 or less, excellent combability and stickiness resistance can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained. In the hair fiber and fiber treatment agent according to the present embodiment, multiple nonionic surfactants b1 having different HLB values ​​may be present.

[0064] The HLB value of the nonionic surfactant b1 may be 14.5 or more, 15.0 or more, 15.5 or more, 15.6 or more, 16.0 or more, 16.5 or more, 16.6 or more, 16.7 or more, 17.0 or more, 17.2 or more, or 17.4 or more, from the viewpoint of obtaining excellent stickiness resistance, softness (before and after rinsing with water), and dispersibility of the fiber treatment agent. The HLB value of the nonionic surfactant b1 may be 17.5 or more, 18.0 or more, 18.3 or more, or 18.5 or more, from the viewpoint of obtaining excellent softness (before and after rinsing with water) and dispersibility of the fiber treatment agent. The HLB value of the nonionic surfactant b1 may be 18.5 or less, 18.3 or less, 18.0 or less, 17.5 or less, or 17.4 or less, from the viewpoint of easily obtaining excellent combability, stickiness resistance, and dispersibility of the fiber treatment agent. The HLB value of the nonionic surfactant b1 may be 17.2 or less, 17.0 or less, 16.7 or less, 16.6 or less, 16.5 or less, 16.0 or less, 15.6 or less, or 15.5 or less, from the viewpoint of easily obtaining excellent combability, stickiness resistance, and dispersibility of the fiber treatment agent. From these viewpoints, the HLB values ​​of the nonionic surfactant b1 are 14.0-18.5, 14.0-18.0, 14.0-17.5, 14.0-17.0, 15.0-19.0, 15.0-18.5, 15.0-18.0, 15.0-17.5, 15.0-17.0, 16.0-19.0, 16.0- It may be 18.5, 16.0 to 18.0, 16.0 to 17.5, 16.0 to 17.0, 16.5 to 19.0, 16.5 to 18.5, 16.5 to 18.0, 16.5 to 17.5, 16.5 to 17.0, 17.0 to 19.0, 17.0 to 18.5, 17.0 to 18.0, or 17.0 to 17.5.

[0065] The HLB value of the nonionic surfactant b2 is 6.0 or more and less than 14.0. That is, in the hair fiber and fiber treatment agent according to this embodiment, at least one nonionic surfactant b2 having an HLB value of 6.0 or more and less than 14.0 is present. When the HLB value of the nonionic surfactant b2 is 6.0 or more, excellent stickiness resistance can be obtained and excellent dispersibility of the fiber treatment agent can be easily obtained. When the HLB value of the nonionic surfactant b2 is less than 14.0, excellent stickiness resistance can be obtained and excellent dispersibility of the fiber treatment agent can be easily obtained. In the hair fiber and fiber treatment agent according to this embodiment, multiple nonionic surfactants b2 having different HLB values ​​may be present.

[0066] From the viewpoints of obtaining excellent softness (before and after rinsing with water) and easy dispersibility of the fiber treatment agent, the HLB value of the nonionic surfactant b2 may be 6.5 or more, 7.0 or more, 7.5 or more, 8.0 or more, 8.4 or more, 8.5 or more, 9.0 or more, 9.2 or more, 9.4 or more, 9.5 or more, 9.7 or more, 10.0 or more, 10.5 or more, 11.0 or more, 11.5 or more, 12.0 or more, or 12.5 or more. From the viewpoint of easily obtaining excellent combability, stickiness resistance, and dispersibility of the fiber treatment agent, the HLB value of the nonionic surfactant b2 may be 13.5 or less, 13.0 or less, 12.5 or less, 12.0 or less, 11.5 or less, 11.0 or less, 10.5 or less, 10.0 or less, 9.7 or less, 9.5 or less, 9.4 or less, 9.2 or less, 9.0 or less, 8.5 or less, or 8.4 or less. From these viewpoints, the HLB value of the nonionic surfactant b2 may be 6.0 to 13.0, 6.0 to 10.0, 6.0 to 9.5, 8.0 or more and less than 14.0, 8.0 to 13.0, 8.0 to 10.0, 8.0 to 9.5, 9.0 or more and less than 14.0, 9.0 to 13.0, 9.0 to 10.0, or 9.0 to 9.5.

[0067] The HLB value of a nonionic surfactant can be calculated based on the Griffin method using the formula weight of the hydrophilic part and the molecular weight of the nonionic surfactant, for example, by extracting the nonionic surfactant to be measured, measuring the molecular weight by GPC, identifying the structure by NMR, etc., and then calculating based on the Griffin method. The HLB value of a nonionic surfactant can be adjusted, for example, by the length of the hydrophilic part (e.g., a (poly)oxyalkylene group).

[0068] In the hair fiber and fiber treatment agent according to this embodiment, the content of the oil S is 0.2 to 600 parts by mass relative to 100 parts by mass of the cationic surfactant A. When the content of the oil S is 0.2 parts by mass or more, excellent combability can be obtained. When the content of the oil S is 600 parts by mass or less, excellent stickiness resistance can be obtained. In the hair fiber and fiber treatment agent according to this embodiment, the content of triglyceride, the content of fatty acid alkyl, or the content of aliphatic saturated hydrocarbon may be 0.2 to 600 parts by mass relative to 100 parts by mass of the cationic surfactant A.

[0069] As the content C1, the content of the oil S, the content of the triglyceride, the content of the fatty acid alkyl, or the content of the aliphatic saturated hydrocarbon may be in the following ranges relative to 100 parts by mass of the cationic surfactant A. From the viewpoint of easily obtaining excellent combability, the content C1 may be 0.3 parts by mass or more, 0.5 parts by mass or more, 0.6 parts by mass or more, 0.7 parts by mass or more, 1 part by mass or more, 5 parts by mass or more, 10 parts by mass or more, 50 parts by mass or more, 100 parts by mass or more, 150 parts by mass or more, 200 parts by mass or more, 250 parts by mass or more, 300 parts by mass or more, 350 parts by mass or more, 400 parts by mass or more, 450 parts by mass or more, 500 parts by mass or more, or 550 parts by mass or more. From the viewpoint of easily achieving excellent stickiness resistance and softness (before and after rinsing with water), the content C1 may be 550 parts by mass or less, 500 parts by mass or less, 450 parts by mass or less, 400 parts by mass or less, 350 parts by mass or less, 300 parts by mass or less, 250 parts by mass or less, 200 parts by mass or less, 150 parts by mass or less, 100 parts by mass or less, 50 parts by mass or less, 10 parts by mass or less, 5 parts by mass or less, 1 part by mass or less, or 0.7 parts by mass or less. From these viewpoints, the content C1 may be 0.2 to 500 parts by mass, 0.2 to 400 parts by mass, 0.2 to 300 parts by mass, 0.2 to 50 parts by mass, 50 to 600 parts by mass, 50 to 500 parts by mass, 50 to 400 parts by mass, 50 to 300 parts by mass, 200 to 600 parts by mass, 200 to 500 parts by mass, 200 to 400 parts by mass, 200 to 300 parts by mass, 300 to 600 parts by mass, 300 to 500 parts by mass, 300 to 400 parts by mass, or 400 to 600 parts by mass.

[0070] In the hair fiber and fiber treatment agent according to this embodiment, the content C2 of the oil S, triglyceride, fatty acid alkyl, or aliphatic saturated hydrocarbon may be in the following ranges relative to 100 parts by mass of the nonionic surfactant b1. From the viewpoint of easily obtaining excellent combability and softness (before and after rinsing with water), the content C2 may be 0.02 parts by mass or more, 0.05 parts by mass or more, 0.1 parts by mass or more, 0.5 parts by mass or more, 1 part by mass or more, 5 parts by mass or more, 10 parts by mass or more, 12 parts by mass or more, 15 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, 40 parts by mass or more, 50 parts by mass or more, or 55 parts by mass or more. From the viewpoint of obtaining excellent stickiness resistance and dispersibility of the fiber treatment agent, the content C2 may be 60 parts by mass or less, 55 parts by mass or less, 50 parts by mass or less, 40 parts by mass or less, 30 parts by mass or less, 20 parts by mass or less, 15 parts by mass or less, 12 parts by mass or less, 10 parts by mass or less, 5 parts by mass or less, 1 part by mass or less, 0.5 parts by mass or less, or 0.1 parts by mass or less. From these viewpoints, the content C2 may be 0.02 to 60 parts by mass, 0.02 to 50 parts by mass, 0.02 to 40 parts by mass, 0.02 to 30 parts by mass, 1 to 60 parts by mass, 1 to 50 parts by mass, 1 to 40 parts by mass, 1 to 30 parts by mass, 20 to 60 parts by mass, 20 to 50 parts by mass, 20 to 40 parts by mass, 20 to 30 parts by mass, 30 to 60 parts by mass, 30 to 50 parts by mass, or 30 to 40 parts by mass.

[0071] In the hair fiber and fiber treatment agent according to this embodiment, the content of the oil S is 20 to 210 parts by mass relative to 100 parts by mass of the nonionic surfactant b2. When the content of the oil S is 20 parts by mass or more, excellent combability can be obtained. When the content of the oil S is 210 parts by mass or less, excellent stickiness resistance can be obtained and excellent dispersibility of the fiber treatment agent can be easily obtained. In the hair fiber and fiber treatment agent according to this embodiment, the content of triglyceride, the content of fatty acid alkyl, or the content of aliphatic saturated hydrocarbon may be 20 to 210 parts by mass relative to 100 parts by mass of the nonionic surfactant b2.

[0072] As the content C3, the content of the oil S, the content of the triglyceride, the content of the fatty acid alkyl, or the content of the aliphatic saturated hydrocarbon may be in the following ranges relative to 100 parts by mass of the nonionic surfactant b2 from the viewpoint of adjusting excellent combability, stickiness resistance, and softness (before and after water rinsing). The content C3 may be 1 part by mass or more, 5 parts by mass or more, 10 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, 40 parts by mass or more, 50 parts by mass or more, or 60 parts by mass or more. The content C3 may be 200 parts by mass or less, 180 parts by mass or less, 150 parts by mass or less, 120 parts by mass or less, 100 parts by mass or less, 90 parts by mass or less, 80 parts by mass or less, 70 parts by mass or less, or 60 parts by mass or less from the viewpoint of adjusting the stickiness resistance and the dispersibility of the fiber treatment agent. From these viewpoints, the content C3 may be 1 to 200 parts by mass, 1 to 100 parts by mass, 1 to 80 parts by mass, 1 to 60 parts by mass, 30 to 200 parts by mass, 30 to 100 parts by mass, 30 to 80 parts by mass, 30 to 60 parts by mass, 60 to 200 parts by mass, 60 to 100 parts by mass, or 60 to 80 parts by mass.

[0073] In the hair fiber and fiber treatment agent according to the present embodiment, the content of the cationic surfactant A is 3 to 20 parts by mass relative to 100 parts by mass of the nonionic surfactant b1. When the content of the cationic surfactant A is 3 parts by mass or more, excellent softness (after rinsing with water) can be obtained. When the content of the cationic surfactant A is 20 parts by mass or less, excellent combability and resistance to stickiness can be obtained, and excellent dispersibility of the fiber treatment agent can be easily obtained.

[0074] The content of the cationic surfactant A may be in the following range relative to 100 parts by mass of the nonionic surfactant b1. The content of the cationic surfactant A may be 4 parts by mass or more, 5 parts by mass or more, 6 parts by mass or more, 8 parts by mass or more, 10 parts by mass or more, 12 parts by mass or more, 15 parts by mass or more, 16 parts by mass or more, 17 parts by mass or more, 18 parts by mass or more, or 19 parts by mass or more, from the viewpoint of easily obtaining excellent softness (before and after rinsing with water). The content of the cationic surfactant A may be 19 parts by mass or less, 18 parts by mass or less, 17 parts by mass or less, 16 parts by mass or less, 15 parts by mass or less, 12 parts by mass or less, 10 parts by mass or less, 8 parts by mass or less, 6 parts by mass or less, 5 parts by mass or less, or 4 parts by mass or less, from the viewpoint of easily obtaining excellent combability, stickiness resistance, and dispersibility of the fiber treatment agent. From these viewpoints, the content of the cationic surfactant A may be 3 to 19 parts by mass, 3 to 17 parts by mass, 3 to 15 parts by mass, 3 to 10 parts by mass, 4 to 20 parts by mass, 4 to 19 parts by mass, 4 to 17 parts by mass, 4 to 15 parts by mass, 4 to 10 parts by mass, 5 to 20 parts by mass, 5 to 19 parts by mass, 5 to 17 parts by mass, 5 to 15 parts by mass, 5 to 10 parts by mass, 8 to 20 parts by mass, 8 to 19 parts by mass, 8 to 17 parts by mass, 8 to 15 parts by mass, 8 to 10 parts by mass, 10 to 20 parts by mass, 10 to 19 parts by mass, 10 to 17 parts by mass, or 10 to 15 parts by mass.

[0075] In the hair fiber and fiber treatment agent according to this embodiment, the content of the cationic surfactant A may be in the following range relative to 100 parts by mass of the nonionic surfactant b2. The content of the cationic surfactant A may be 10 parts by mass or more, 15 parts by mass or more, 20 parts by mass or more, 30 parts by mass or more, 50 parts by mass or more, 70 parts by mass or more, 100 parts by mass or more, 500 parts by mass or more, 1000 parts by mass or more, or 5000 parts by mass or more, from the viewpoint of easily obtaining excellent softness (before and after rinsing with water). The content of the cationic surfactant A may be 10000 parts by mass or less, 5000 parts by mass or less, 1000 parts by mass or less, 500 parts by mass or less, 100 parts by mass or less, 70 parts by mass or less, 50 parts by mass or less, 30 parts by mass or less, 20 parts by mass or less, or 15 parts by mass or less, from the viewpoint of easily obtaining excellent combability, stickiness resistance, and dispersibility of the fiber treatment agent. From these viewpoints, the content of the cationic surfactant A may be 10 to 10,000 parts by mass, 10 to 1,000 parts by mass, 10 to 100 parts by mass, 10 to 30 parts by mass, 10 to 20 parts by mass, 15 to 10,000 parts by mass, 15 to 1,000 parts by mass, 15 to 100 parts by mass, 15 to 30 parts by mass, 15 to 20 parts by mass, 20 to 10,000 parts by mass, 20 to 1000 parts by mass, 20 to 1000 parts by mass, or 20 to 30 parts by mass.

[0076] In the hair fiber and fiber treatment agent according to this embodiment, the content of nonionic surfactant b1 may be in the following ranges relative to 100 parts by mass of nonionic surfactant b2. From the viewpoint of easily obtaining excellent softness (before and after rinsing with water), the content of nonionic surfactant b1 may be 10 parts by mass or more, 50 parts by mass or more, 80 parts by mass or more, 100 parts by mass or more, 120 parts by mass or more, 150 parts by mass or more, 180 parts by mass or more, 200 parts by mass or more, 250 parts by mass or more, 300 parts by mass or more, 350 parts by mass or more, or 400 parts by mass or more. From the viewpoint of easily achieving excellent combability and resistance to stickiness, the content of the nonionic surfactant b1 may be 1,000 parts by mass or less, 800 parts by mass or less, 600 parts by mass or less, 500 parts by mass or less, 400 parts by mass or less, 350 parts by mass or less, 300 parts by mass or less, 250 parts by mass or less, 200 parts by mass or less, 180 parts by mass or less, 150 parts by mass or less, or 120 parts by mass or less. From these viewpoints, the content of the nonionic surfactant b1 may be 10 to 1000 parts by mass, 10 to 500 parts by mass, 10 to 300 parts by mass, 10 to 200 parts by mass, 10 to 150 parts by mass, 100 to 1000 parts by mass, 100 to 500 parts by mass, 100 to 300 parts by mass, 100 to 200 parts by mass, 100 to 150 parts by mass, 150 to 1000 parts by mass, 150 to 500 parts by mass, 150 to 300 parts by mass, 150 to 200 parts by mass, 200 to 1000 parts by mass, 200 to 500 parts by mass, 200 to 300 parts by mass, 300 to 1000 parts by mass, or 300 to 500 parts by mass.

[0077] In the hair fiber according to this embodiment, the total amount of the oil S, the cationic surfactant A, the nonionic surfactant b1, and the nonionic surfactant b2 is 0.002 to 4 mass% (0.002 to 4.0 mass%) based on the total amount of the hair fiber. When the total amount is 0.002 mass% or more, excellent softness (after rinsing with water) can be obtained, and excellent softness (before rinsing with water) can be easily obtained. When the total amount is 4 mass% or less, excellent combability and stickiness resistance can be obtained.

[0078] In the hair fiber according to this embodiment, the total amount of the oil S, the cationic surfactant A, the nonionic surfactant b1, and the nonionic surfactant b2 may be in the following range based on the total amount of the hair fiber. From the viewpoint of easy to obtain excellent combability and softness (before and after rinsing with water), the total amount may be 0.004% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.02% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.3% by mass or more, 0.5% by mass or more, 0.8% by mass or more, or 1% by mass or more. From the viewpoint of easy to obtain excellent softness (before and after rinsing with water), the total amount may be 1.2% by mass or more, 1.4% by mass or more, 1.5% by mass or more, 1.6% by mass or more, 1.8% by mass or more, 2% by mass or more, 2.5% by mass or more, 3% by mass or more, or 3.5% by mass or more. From the viewpoint of easily obtaining excellent combability and stickiness resistance, the total amount may be 3.5% by mass or less, 3% by mass or less, 2.5% by mass or less, 2% by mass or less, 1.8% by mass or less, 1.6% by mass or less, 1.5% by mass or less, 1.4% by mass or less, 1.2% by mass or less, or 1% by mass or less. From the viewpoint of easily obtaining excellent stickiness resistance, the total amount may be 0.8% by mass or less, 0.5% by mass or less, 0.3% by mass or less, 0.1% by mass or less, 0.05% by mass or less, 0.02% by mass or less, 0.01% by mass or less, or 0.005% by mass or less. From these viewpoints, the total amount may be 0.005 to 4 mass%, 0.01 to 4 mass%, 0.1 to 4 mass%, 1 to 4 mass%, 0.002 to 2 mass%, 0.005 to 2 mass%, 0.01 to 2 mass%, 0.1 to 2 mass%, 1 to 2 mass%, 0.002 to 1 mass%, 0.005 to 1 mass%, 0.01 to 1 mass%, or 0.1 to 1 mass%.

[0079] In the fiber for hair according to the present embodiment, the content C4 of the oil S content, the triglyceride content, the fatty acid alkyl content, or the aliphatic saturated hydrocarbon content exceeds 0% by mass based on the total amount of the fiber for hair, and may be in the following ranges: From the viewpoint of easily obtaining excellent combability, the content C4 may be 0.0005% by mass or more, 0.001% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.12% by mass or more, 0.15% by mass or more, 0.16% by mass or more, 0.18% by mass or more, 0.2% by mass or more, 0.3% by mass or more, or 0.5% by mass or more. From the viewpoint of obtaining excellent stickiness resistance and softness (before and after rinsing with water), the content C4 may be 5% by mass or less, 3% by mass or less, 1% by mass or less, 0.5% by mass or less, 0.3% by mass or less, 0.2% by mass or less, 0.18% by mass or less, 0.16% by mass or less, 0.15% by mass or less, 0.12% by mass or less, or 0.1% by mass or less. From these viewpoints, the content C4 may be more than 0% by mass and 5% by mass or less, more than 0% by mass and 1% by mass or less, more than 0% by mass and 0.5% by mass or less, more than 0% by mass and 0.2% by mass or less, 0.05 to 5% by mass, 0.05 to 1% by mass, 0.05 to 0.5% by mass, 0.05 to 0.2% by mass, 0.1 to 5% by mass, 0.1 to 1% by mass, 0.1 to 0.5% by mass, or 0.1 to 0.2% by mass.

[0080] In the hair fiber according to the present embodiment, the content of the cationic surfactant A exceeds 0% by mass based on the total amount of the hair fiber, and may be in the following range: From the viewpoint of easily obtaining excellent softness (before and after rinsing with water), the content of the cationic surfactant A may be 0.0001% by mass or more, 0.0002% by mass or more, 0.0003% by mass or more, 0.0005% by mass or more, 0.0008% by mass or more, 0.001% by mass or more, 0.002% by mass or more, 0.003% by mass or more, 0.005% by mass or more, 0.008% by mass or more, 0.01% by mass or more, 0.02% by mass or more, 0.03% by mass or more, 0.05% by mass or more, 0.07% by mass or more, 0.09% by mass or more, 0.1% by mass or more, 0.15% by mass or more, or 0.2% by mass or more. From the viewpoint of easily achieving excellent combing ease and resistance to stickiness, the content of cationic surfactant A may be 1 mass% or less, 0.5 mass% or less, 0.45 mass% or less, 0.4 mass% or less, 0.35 mass% or less, 0.3 mass% or less, 0.25 mass% or less, 0.2 mass% or less, 0.15 mass% or less, 0.1 mass% or less, 0.09 mass% or less, 0.07 mass% or less, 0.05 mass% or less, or 0.03 mass% or less. From these viewpoints, the content of cationic surfactant A may be more than 0% by mass and 1% by mass or less, more than 0% by mass and 0.1% by mass or less, more than 0% by mass and 0.07% by mass or less, more than 0% by mass and 0.05% by mass or less, 0.01 to 1% by mass, 0.01 to 0.1% by mass, 0.01 to 0.07% by mass, 0.01 to 0.05% by mass, 0.03 to 1% by mass, 0.03 to 0.1% by mass, 0.03 to 0.07% by mass, 0.03 to 0.05% by mass, 0.05 to 1% by mass, 0.05 to 0.1% by mass, or 0.05 to 0.07% by mass.

[0081] In the hair fiber according to this embodiment, the content of the nonionic surfactant b1 is greater than 0% by mass based on the total amount of the hair fiber, and may be in the following range: The content of the nonionic surfactant b1 may be 0.0001% by mass or more, 0.0005% by mass or more, 0.001% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, 0.4% by mass or more, 0.5% by mass or more, 0.6% by mass or more, 0.7% by mass or more, 0.9% by mass or more, 1% by mass or more, 1.5% by mass or more, or 2% by mass or more, from the viewpoint of obtaining excellent softness (before and after rinsing with water) and easy dispersibility of the fiber treatment agent. From the viewpoint of easily achieving excellent combability and resistance to stickiness, the content of the nonionic surfactant b1 may be 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, 1.5% by mass or less, 1% by mass or less, 0.9% by mass or less, 0.7% by mass or less, 0.6% by mass or less, 0.5% by mass or less, 0.4% by mass or less, 0.3% by mass or less, 0.2% by mass or less, 0.1% by mass or less, 0.05% by mass or less, 0.01% by mass or less, or 0.005% by mass or less. From these viewpoints, the content of the nonionic surfactant b1 may be more than 0 mass% and not more than 5 mass%, more than 0 mass% and not more than 3 mass%, more than 0 mass% and not more than 2 mass%, more than 0 mass% and not more than 0.7 mass%, 0.1 to 5 mass%, 0.1 to 3 mass%, 0.1 to 2 mass%, 0.1 to 0.7 mass%, 0.3 to 5 mass%, 0.3 to 3 mass%, 0.3 to 2 mass%, or 0.3 to 0.7 mass%.

[0082] In the hair fiber according to this embodiment, the content of the nonionic surfactant b2 exceeds 0% by mass based on the total amount of the hair fiber, and may be in the following range: From the viewpoint of easily obtaining excellent dispersibility of the fiber treatment agent, the content of the nonionic surfactant b2 may be 0.0005% by mass or more, 0.001% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, 0.4% by mass or more, 0.5% by mass or more, 0.7% by mass or more, or 1% by mass or more. From the viewpoint of easily obtaining excellent resistance to stickiness and softness (before and after rinsing with water), the content of the nonionic surfactant b2 may be 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, 1.5% by mass or less, 1% by mass or less, 0.7% by mass or less, 0.5% by mass or less, 0.4% by mass or less, 0.3% by mass or less, 0.2% by mass or less, 0.1% by mass or less, 0.05% by mass or less, 0.01% by mass or less, or 0.005% by mass or less. From these viewpoints, the content of the nonionic surfactant b2 may be more than 0 mass% and not more than 5 mass%, more than 0 mass% and not more than 2 mass%, more than 0 mass% and not more than 1 mass%, more than 0 mass% and not more than 0.5 mass%, 0.1 to 5 mass%, 0.1 to 2 mass%, 0.1 to 1 mass%, 0.1 to 0.5 mass%, 0.2 to 5 mass%, 0.2 to 2 mass%, 0.2 to 1 mass%, or 0.2 to 0.5 mass%.

[0083] The contents of the oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2 can be measured using NMR, GC-MS, HPLC, FT-IR, hot water extraction, solvent extraction, etc. The relative amounts of the oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2 in hair fibers tend to be similar to the relative amounts in the fiber treatment agent.

[0084] In the fiber treatment agent according to this embodiment, the total amount of the oil S, the cationic surfactant A, the nonionic surfactant b1, and the nonionic surfactant b2 may be in the following range based on the total amount of the fiber treatment agent. From the viewpoint of easily obtaining excellent combability and softness (before and after rinsing with water), the total amount may be 0.02% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.2% by mass or more, 0.5% by mass or more, 1% by mass or more, 3% by mass or more, 5% by mass or more, 8% by mass or more, or 10% by mass or more. From the viewpoint of easily obtaining excellent stickiness resistance, the total amount may be 40% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 20% by mass or less, 18% by mass or less, 16% by mass or less, 15% by mass or less, 14% by mass or less, 12% by mass or less, 10% by mass or less, 8% by mass or less, 5% by mass or less, 3% by mass or less, 1% by mass or less, 0.5% by mass or less, 0.2% by mass or less, 0.1% by mass or less, or 0.05% by mass or less. From these viewpoints, the total amount may be 0.02 to 40 mass%, 0.05 to 40 mass%, 0.1 to 40 mass%, 1 to 40 mass%, 10 to 40 mass%, 0.02 to 20 mass%, 0.05 to 20 mass%, 0.1 to 20 mass%, 1 to 20 mass%, 10 to 20 mass%, 0.02 to 10 mass%, 0.05 to 10 mass%, 0.1 to 10 mass%, or 1 to 10 mass%.

[0085] In the fiber treatment agent according to the present embodiment, the content C5 of the oil S, triglyceride, fatty acid alkyl, or aliphatic saturated hydrocarbon exceeds 0% by mass based on the total amount of the fiber treatment agent, and may be in the following ranges. From the viewpoint of easily obtaining excellent combability, the content C5 may be 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, 1.2% by mass or more, or 1.5% by mass or more. From the viewpoint of easily obtaining excellent stickiness resistance and dispersibility of the fiber treatment agent, the content C5 may be 50% by mass or less, 30% by mass or less, 10% by mass or less, 5% by mass or less, 3% by mass or less, or 2% by mass or less. From these viewpoints, the content C5 may be more than 0 mass% and not more than 50 mass%, more than 0 mass% and not more than 10 mass%, more than 0 mass% and not more than 5 mass%, more than 0 mass% and not more than 2 mass%, 0.5 to 50 mass%, 0.5 to 10 mass%, 0.5 to 5 mass%, 0.5 to 2 mass%, 1 to 50 mass%, 1 to 10 mass%, 1 to 5 mass%, or 1 to 2 mass%.

[0086] In the fiber treatment agent according to the present embodiment, the content of the cationic surfactant A exceeds 0% by mass based on the total amount of the fiber treatment agent, and may be in the following range: From the viewpoint of easily obtaining excellent softness (before and after rinsing with water), the content of the cationic surfactant A may be 0.001% by mass or more, 0.002% by mass or more, 0.003% by mass or more, 0.005% by mass or more, 0.008% by mass or more, 0.01% by mass or more, 0.02% by mass or more, 0.03% by mass or more, 0.05% by mass or more, 0.08% by mass or more, 0.1% by mass or more, 0.2% by mass or more, 0.3% by mass or more, or 0.5% by mass or more. From the viewpoint of easily obtaining excellent combing ability, resistance to stickiness, and dispersibility of the fiber treatment agent, the content of the cationic surfactant A may be 10% by mass or less, 5% by mass or less, 4.5% by mass or less, 4% by mass or less, 3.5% by mass or less, 3% by mass or less, 2.5% by mass or less, 2% by mass or less, 1.5% by mass or less, 1% by mass or less, 0.9% by mass or less, 0.7% by mass or less, or 0.6% by mass or less. From these viewpoints, the content of cationic surfactant A may be more than 0 mass% and not more than 10 mass%, more than 0 mass% and not more than 1 mass%, more than 0 mass% and not more than 0.7 mass%, more than 0 mass% and not more than 0.6 mass%, 0.1 to 10 mass%, 0.1 to 1 mass%, 0.1 to 0.7 mass%, 0.1 to 0.6 mass%, 0.3 to 10 mass%, 0.3 to 1 mass%, 0.3 to 0.7 mass%, 0.3 to 0.6 mass%, 0.5 to 10 mass%, 0.5 to 1 mass%, or 0.5 to 0.6 mass%.

[0087] In the fiber treatment agent according to the present embodiment, the content of the nonionic surfactant b1 exceeds 0% by mass based on the total amount of the fiber treatment agent, and may be in the following range. The content of the nonionic surfactant b1 may be 0.001% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, 3% by mass or more, 4% by mass or more, or 5% by mass or more, from the viewpoint of easily obtaining excellent softness (before and after rinsing with water) and dispersibility of the fiber treatment agent. The content of the nonionic surfactant b1 may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, 10% by mass or less, 9% by mass or less, 7% by mass or less, or 6% by mass or less, from the viewpoint of easily obtaining excellent combability and stickiness resistance. From these viewpoints, the content of the nonionic surfactant b1 may be more than 0 mass% and not more than 50 mass%, more than 0 mass% and not more than 30 mass%, more than 0 mass% and not more than 20 mass%, more than 0 mass% and not more than 7 mass%, 1 to 50 mass%, 1 to 30 mass%, 1 to 20 mass%, 1 to 7 mass%, 3 to 50 mass%, 3 to 30 mass%, 3 to 20 mass%, or 3 to 7 mass%.

[0088] In the fiber treatment agent according to the present embodiment, the content of the nonionic surfactant b2 exceeds 0% by mass based on the total amount of the fiber treatment agent, and may be in the following range. The content of the nonionic surfactant b2 may be 0.005% by mass or more, 0.01% by mass or more, 0.05% by mass or more, 0.1% by mass or more, 0.5% by mass or more, 1% by mass or more, 2% by mass or more, or 2.5% by mass or more, from the viewpoint of easily obtaining excellent dispersibility of the fiber treatment agent. The content of the nonionic surfactant b2 may be 50% by mass or less, 40% by mass or less, 30% by mass or less, 20% by mass or less, 15% by mass or less, 10% by mass or less, 7% by mass or less, 5% by mass or less, 4% by mass or less, or 3% by mass or less, from the viewpoint of easily obtaining excellent stickiness resistance, softness (before and after rinsing with water), and dispersibility of the fiber treatment agent. From these viewpoints, the content of the nonionic surfactant b2 may be more than 0 mass% and not more than 50 mass%, more than 0 mass% and not more than 20 mass%, more than 0 mass% and not more than 10 mass%, more than 0 mass% and not more than 5 mass%, 1 to 50 mass%, 1 to 20 mass%, 1 to 10 mass%, 1 to 5 mass%, 2 to 50 mass%, 2 to 20 mass%, 2 to 10 mass%, or 2 to 5 mass%.

[0089] The fiber treatment agent according to the present embodiment may contain water. In the fiber treatment agent according to the present embodiment, the water content may be in the following range based on the total amount of the fiber treatment agent. The water content may be 60% by mass or more, 62% by mass or more, 65% by mass or more, 70% by mass or more, 75% by mass or more, 80% by mass or more, 85% by mass or more, or 90% by mass or more from the viewpoint of easily obtaining excellent stickiness resistance and dispersibility of the fiber treatment agent. The water content may be 99.9% by mass or less, 99.5% by mass or less, 99% by mass or less, 97% by mass or less, 95% by mass or less, 94% by mass or less, 93.5% by mass or less, 93% by mass or less, 92% by mass or less, or 90% by mass or less from the viewpoint of easily obtaining excellent combability and softness (before and after rinsing with water). From these viewpoints, the water content may be 60 to 99.9 mass%, 62 to 99 mass%, 70 to 99 mass%, 85 to 99 mass%, 62 to 95 mass%, 62 to 92 mass%, 70 to 95 mass%, or 85 to 95 mass%.

[0090] The hair fiber according to this embodiment may have other additives (components other than oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2) present on at least a portion of the surface of the base fiber, and the fiber treatment agent according to this embodiment may have other additives (components other than oil S, cationic surfactant A, nonionic surfactant b1, and nonionic surfactant b2). Examples of such additives include oils other than oil S (e.g., higher alcohols), cationic surfactants other than cationic surfactant A, nonionic surfactants other than nonionic surfactant b1 and nonionic surfactant b2, antibacterial agents, deodorizing agents, antifungal agents, UV cut agents, fabric softeners, SR agents, aromatic agents, flame retardants, antifoaming agents, fragrances, and the like. In the fiber for hair according to this embodiment, at least one selected from the group consisting of zeolite and zirconium carbide may not be present on the surface of the base fiber, and the base fiber may not contain at least one selected from the group consisting of zeolite and zirconium carbide. In the fiber for hair according to this embodiment, an alcohol consisting of only carbon, hydrogen and oxygen atoms may not be present on the surface of the base fiber, and the fiber treatment agent according to this embodiment may not contain an alcohol consisting of only carbon, hydrogen and oxygen atoms.

[0091] In the hair fiber and fiber treatment agent according to this embodiment, the content of oil S, the content of triglyceride, the content of fatty acid alkyl, or the content of aliphatic saturated hydrocarbons may be 50% by mass or more, more than 50% by mass, 70% by mass or more, 90% by mass or more, 95% by mass or more, 98% by mass or more, 99% by mass or more, or substantially 100% by mass, based on the total amount of oil present in the hair fiber or fiber treatment agent (the total amount of oil S and oils not corresponding to oil S).

[0092] In the hair fiber and fiber treatment agent according to this embodiment, the content of cationic surfactant A may be 50 mass% or more, more than 50 mass%, 70 mass% or more, 90 mass% or more, 95 mass% or more, 98 mass% or more, 99 mass% or more, or substantially 100 mass% based on the total amount of cationic surfactants present in the hair fiber or fiber treatment agent (the total amount of cationic surfactants A and cationic surfactants not corresponding to cationic surfactant A).

[0093] In the hair fiber and fiber treatment agent according to this embodiment, the total amount of nonionic surfactant b1 and nonionic surfactant b2 may be 50 mass% or more, more than 50 mass%, 70 mass% or more, 90 mass% or more, 95 mass% or more, 98 mass% or more, 99 mass% or more, or substantially 100 mass% based on the total amount of nonionic surfactants present in the hair fiber or fiber treatment agent (the total amount of nonionic surfactants b1, nonionic surfactant b2, and nonionic surfactants not corresponding to nonionic surfactant b1 and nonionic surfactant b2).

[0094] In the method for producing hair fiber according to the present embodiment, the fiber treatment agent according to the present embodiment is brought into contact with the surface of the base fiber. That is, the method for producing hair fiber according to the present embodiment includes a fiber treatment step in which the fiber treatment agent according to the present embodiment is brought into contact with the surface of the base fiber. In the fiber treatment step, the fiber treatment agent in a one-phase state can be brought into contact with the surface of the base fiber.

[0095] In the fiber treatment process, the fiber treatment agent can be applied to at least a part of the surface of the base fiber. In this case, a conventionally known means for applying a liquid to a fiber can be used. For example, a means for applying the fiber treatment agent to the base fiber using a roll having a surface on which the fiber treatment agent is attached (roll transfer method); a means for immersing the base fiber in a liquid tank containing the fiber treatment agent (dipping method); a means for spraying the fiber treatment agent onto the base fiber; a means for attaching the fiber treatment agent to the base fiber using a coating tool such as a brush or paint brush, etc. can be mentioned. For example, in the dipping method, the amount of the fiber treatment agent applied can be adjusted by adjusting the number of applications, the content of the active ingredient in the fiber treatment agent, etc.

[0096] The method for producing a hair fiber according to this embodiment may include a spinning step, prior to the fiber treatment step, of obtaining a base fiber by spinning a composition containing a material for the base fiber. In the spinning step, the composition containing the material for the base fiber can be melt spun (melt deformed).

[0097] The method for producing hair fibers according to this embodiment may include a kneading step of melt-kneading a composition containing the material of the base fiber before the spinning step. As an apparatus for melt-kneading, various general kneaders can be used. Examples of the kneader include a single-screw extruder, a twin-screw extruder, a roll, a Banbury mixer, and a kneader.

[0098] The method for producing the fiber for hair according to this embodiment may include a drawing step of drawing the yarn (undrawn yarn) obtained in the spinning step, prior to the fiber treatment step.

[0099] The draw ratio in the drawing step may be 1.5 times or more, or 2.0 times or more, from the viewpoint of facilitating the development of fiber strength. The draw ratio may be 5.0 times or less, or 4.0 times or less, from the viewpoint of preventing yarn breakage during drawing. From these viewpoints, the draw ratio may be 1.5 to 5.0 times, or 2.0 to 4.0 times.

[0100] The drawing process may be performed by a two-step method in which the undrawn yarn is once wound around a bobbin and then drawn in a step not subsequent to the spinning step, or by a direct spinning drawing method in which the undrawn yarn is drawn in a step subsequent to the spinning step without being wound around a bobbin. The drawing process may be performed by a one-stage drawing method in which the yarn is drawn to the desired draw ratio in one go, or by a multi-stage drawing method in which the yarn is drawn to the desired draw ratio by two or more goes.

[0101] The temperature of the stretching treatment may be 80 to 120° C. When the temperature is 80° C. or higher, the strength of the fiber can be sufficiently ensured and thread breakage is unlikely to occur. When the temperature is 120° C. or lower, a suitable touch of the fiber can be easily obtained.

[0102] The method for producing a hair fiber according to the present embodiment may include a heat treatment step of heat treating (annealing) the yarn (drawn yarn) obtained in the drawing step after the drawing step. By carrying out the heat treatment step, the thermal shrinkage rate of the drawn yarn can be reduced. The heat treatment step can be carried out before the fiber treatment step.

[0103] The heat treatment temperature may be 100° C. or higher, or 120° C. or higher. The heat treatment temperature may be 200° C. or lower, or 150° C. or lower. The heat treatment may be performed continuously after the stretching treatment, or may be performed after a period of time has elapsed after the film is taken up.

[0104] The method for producing the hair fiber according to the present embodiment may include a processing step of processing the yarn (drawn yarn) after the heat treatment step. In the processing step, for example, the yarn may be subjected to a shaping process. The heat treatment step may be performed before or after the fiber treatment step.

[0105] The hair accessory according to this embodiment comprises the hair fiber according to this embodiment. The hair accessory according to this embodiment is an article that can be attached to and detached from the head, and may be in a form consisting of the hair fiber according to this embodiment (for example, a fiber bundle of the hair fiber). Examples of hair accessories include wigs, hair toupees, hair pieces, braids, hair extensions, false hair, etc. EXAMPLES

[0106] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples.

[0107] <Preparation of base fiber> The following fibers were prepared as base fibers. Base fiber A: A fiber using a mixture of polyvinyl chloride (Taiyo PVC Co., Ltd., product name "TH-700") and acrylonitrile-styrene copolymer (Denka Co., Ltd., product name "GR-AT-6S"), polyvinyl chloride content: 50 mass% or more, acrylonitrile-styrene copolymer content: 30 mass%, and moment of inertia of weak axis is 10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the solution spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber B: Polyvinyl chloride (Taiyo PVC Co., Ltd., product name "TH-700") fiber, with a weak axis second moment of area of ​​10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the solution spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber C: A fiber made of acrylonitrile-styrene copolymer (Denka Co., Ltd., product name "GR-AT-6S"), with a weak axis second moment of area of ​​10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the solution spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber D: Fiber made of PET (Mitsui Chemicals, Inc., product name "J125S"), with a weak axis second moment of area of ​​10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the melt spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber E: A fiber made of polyamide resin (Asahi Kasei Chemicals Corporation, product name "Leona 1500"), with a weak axis second moment of area of ​​10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the solution spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber F: A fiber made of polypropylene (Sumitomo Chemical Co., Ltd., product name "Sumitomo Noblen S131"), with a weak axis second moment of area of ​​10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the melt spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber G: A fiber made of vinyl chloride-acrylonitrile copolymer (copolymerization ratio 50:50, weight average molecular weight 80,000 to 130,000). The moment of inertia of the weak axis is 10 × 10 -4 mm 4 Fibers spun from a nozzle having an outlet cross section of 40 to 70 decitex (fibers produced by the solution spinning method), with an average fineness of 40 to 70 decitex (average fineness of 100 fibers) Base fiber H: Human hair, Sun Taiyang's product name "VELVET REMI" used after washing with 40°C water

[0108] <Preparation of fiber treatment agent> Fiber treatment agents were prepared by mixing water with the oils and surfactants shown in Tables 1 to 9. The oil content, the total amount of all surfactants (cationic surfactant, nonionic surfactant 1, and nonionic surfactant 2) in the fiber treatment agent, and the water content are based on the total amount of the fiber treatment agent.

[0109] In each of the Examples and Comparative Examples, the oils and surfactants marked with "○" in the table were used. The following reagents were used as the oils and surfactants. In Example 11, stearyl trimethyl ammonium chloride and behenyl trimethyl ammonium chloride were used as the cationic surfactants (mass ratio: 1:1). In Example 17, polyoxyethylene lauryl ether (carbon chain carbon number: 12, HLB 17.4) and polyoxyethylene stearyl ether (carbon chain carbon number: 18, HLB 16.6) were used as the nonionic surfactants 1 (mass ratio: 1:1). In Comparative Example 10, polyoxyethylene lauryl ether (carbon chain carbon number: 12, HLB 13.1) and polyoxyethylene cetyl ether (carbon chain carbon number: 16, HLB 9.4) were used as the nonionic surfactants 2 (mass ratio: 1:1). In Comparative Example 14, polyoxyethylene cetyl ether (carbon chain length: 16, HLB 14.3) and polyoxyethylene cetyl ether (carbon chain length: 16, HLB 16.7) were used as nonionic surfactant 1 (mass ratio: 1:1).

[0110] (Oil content) Isopropyl myristate: Nikko Chemicals Co., Ltd., product name "NIKKOL IPM-100", iodine value 0.5 or less Octyl oleate: In-house preparation, iodine value 80-90 Liquid paraffin: Sonneborn, trade name "KLEAROL", iodine value 0.5 or less Triglyceride 1: Medium-chain triglyceride, triglyceride with octanoic acid (carbon number 8) as the main component, iodine value 4 or less, Kao Corporation, product name "Coconard RK" Triglyceride 2: Triglyceride with coconut oil and lauric acid (12 carbon atoms) as the main component, iodine value 7-11, Nikko Chemicals Co., Ltd., product name "NIKKOL TRIFAT C-24" Triglyceride 3: Olive fruit oil, triglyceride mainly composed of oleic acid (18 carbon atoms, abbreviated 18:1), iodine value 79-88, Nikko Chemicals Co., Ltd., product name "NIKKOL Olive Oil" Triglyceride 4: Sunflower seed oil, a triglyceride mainly composed of linoleic acid (carbon number 18, abbreviated 18:2) and oleic acid (carbon number 18, abbreviated 18:1), iodine value 120-139, Nikko Chemicals Co., Ltd., product name "NIKKOL Sunflower Oil" Triglyceride 5: Rosehip oil (Rosa canina fruit oil), a triglyceride mainly composed of linoleic acid (carbon number 18, abbreviated 18:2) and linolenic acid (carbon number 18, abbreviated 18:3), iodine value 170-190, Nikko Chemicals Co., Ltd., product name "NIKKOL Rosehip Oil"

[0111] (cationic surfactant) Cetyltrimethylammonium chloride aqueous solution: Carbon chain carbon number 16, Nikko Chemicals Co., Ltd., product name "CA-2330", active ingredient content approximately 29% Mixture of stearyl trimethylammonium chloride, isopropyl alcohol and water: Carbon chain length 18, Toho Chemical Co., Ltd., product name "Katinal STC-25W", active ingredient content approx. 25% Mixture of stearyl dimethyl benzyl ammonium chloride and isopropyl alcohol: Carbon chain with 18 carbon atoms, Sanyo Chemical Industries, Ltd., product name "Cation S", active ingredient content approximately 91% Mixture of behenyltrimethylammonium chloride and isopropyl alcohol: Toho Chemical Co., Ltd., product name "Catinal DC-80", carbon chain carbon number 22, active ingredient amount approx. 80% Tetracosyltrimethylammonium chloride: 24 carbon chain, in-house preparation

[0112] (Nonionic surfactants 1) Polyoxyethylene octyl ether: Carbon chain carbon number 8, HLB 17.0, in-house preparation Polyoxyethylene decyl ether: Carbon chain carbon number 10, HLB 17.0, in-house preparation Polyoxyethylene lauryl ether: Carbon chain carbon number 12, HLB 15.6, in-house preparation Polyoxyethylene lauryl ether: Carbon chain carbon number 12, HLB 17.4, Aoki Oil Industries Co., Ltd., product name "Brownon EL-1530" Polyoxyethylene lauryl ether: Carbon chain length 12, HLB 18.5, in-house preparation Polyoxyethylene lauryl ether: Carbon chain carbon number 12, HLB 19.5, in-house preparation Polyoxyethylene laurate: Carbon chain carbon number 12, HLB 17.0, in-house preparation Dipolyoxyethylene laurylamine: Carbon chain carbon number 12, HLB 17.0, in-house preparation Polyoxyethylene cetyl ether: carbon chain carbon number 16, HLB 14.3, Aoki Oil Industries Co., Ltd., product name "Brownon CH-315L" Polyoxyethylene cetyl ether: carbon chain carbon number 16, HLB 15.5, Aoki Oil Industries Co., Ltd., product name "Brownon CH-320L" Polyoxyethylene cetyl ether: carbon chain carbon number 16, HLB 16.7, Aoki Oil Industries Co., Ltd., product name "Brownon CH-330L" Polyoxyethylene cetyl ether: Carbon chain length 16, HLB 18.3, in-house preparation Coconut oil fatty acid diethanolamide: carbon chain length 12-18, HLB approx. 17.0, in-house preparation Polyoxyethylene stearyl ether: Carbon chain carbon number 18, HLB 16.6, Aoki Oil Industries Co., Ltd., product name "Brownon SR-730" Polyoxyethylene behenyl ether: Carbon chain carbon number 22, HLB 17.0, in-house preparation Polyoxyethylene tetracosanoic acid ester: Carbon chain carbon number 24, HLB 17.0, in-house preparation

[0113] (Nonionic surfactants 2) Polyoxyethylene octyl ether: Carbon chain carbon number 8, HLB 10.1, in-house preparation Polyoxyethylene decyl ether: Carbon chain carbon number 10, HLB 9.0, Aoki Oil Industries Co., Ltd., product name "Finesurf D-1303" Polyoxyethylene lauryl ether: Carbon chain carbon number 12, HLB 9.7, Kao Corporation, product name "Emulgen 104P" Polyoxyethylene lauryl ether: Carbon chain carbon number 12, HLB 13.1, Aoki Oil Industries Co., Ltd., product name "Brownon EL-1509P" Polyoxyethylene laurate: Carbon chain length 12, HLB 9.7, in-house preparation Dipolyoxyethylene laurylamine: Carbon chain length 12, HLB 9.7, in-house preparation Polyoxyethylene cetyl ether: carbon chain carbon number 16, HLB 5.7, Aoki Oil Industries Co., Ltd., product name "Brownon CH-302L" Polyoxyethylene cetyl ether: Carbon chain length 16, HLB 8.4, in-house preparation Polyoxyethylene cetyl ether: Carbon chain carbon number 16, HLB 9.4, Aoki Oil Industries Co., Ltd., product name "Brownon CH-305" Polyoxyethylene cetyl ether: carbon chain carbon number 16, HLB 12.9, Aoki Oil Industries Co., Ltd., product name "Brownon CH-310L" Coconut oil fatty acid diethanolamide: carbon chain length 12-18, HLB approx. 9.5, in-house preparation Polyoxyethylene stearyl ether: Carbon chain carbon number 18, HLB 9.2, Aoki Oil Industries Co., Ltd., product name "Brownon SR-705" Polyoxyethylene behenyl ether: Carbon chain carbon number 22, HLB 9.7, in-house preparation Polyoxyethylene tetracosanoic acid ester: Carbon chain carbon number 24, HLB 9.3, in-house preparation

[0114] (Evaluation of Dispersibility of Fiber Treatment Agents) Dispersibility was evaluated for fiber treatment agents having the same composition as the fiber treatment agents used in the examples and comparative examples. First, nonionic surfactant 2 was added to water at 70°C, and then pre-stirred at 70°C and 300 rpm for about 120 minutes. Next, oil was added, and then emulsification was performed by processing for about 7 minutes at room temperature and 6500 rpm using a homogenizer (homogenizer MARKII / TOKUSYU KIKA). Thereafter, nonionic surfactant 1 and cationic surfactant dissolved in water were added, and then the fiber treatment agent was prepared by stirring for about 30 minutes at room temperature and 300 rpm. The fiber treatment agent was left to stand, and the state was visually observed. When the solid component and the liquid component that is not mixed with water were dispersed in a colloidal state overall without separating into two phases before mixing with water, it was evaluated as "A", and when these components were not dispersed in a colloidal state overall (including the case where they were separated into two phases) it was evaluated as "B". The results are shown in each table. For the comparative examples not using the oil, cationic surfactant, nonionic surfactant 1 or nonionic surfactant 2, the same operation was carried out without using the corresponding components.

[0115] <Preparation of fibers for evaluation> (Examples 1 to 58 and Comparative Examples 1 to 22) The above-mentioned base fiber was stretched at 100°C, and then annealed at 110°C to obtain a fiber with a single fineness of 20 to 100 decitex. The stretch ratio was 3.25 times, and the relaxation rate during annealing was 25%. The relaxation rate during annealing is a value calculated by "(circumference of the part closest to the exit of the roller of the annealing furnace) / (circumference of the part closest to the entrance of the roller of the annealing furnace)". Then, using a gear machine (NEW YAKI BRAID CRIMPING M / C-2.5mm / SUNG JIN INDUSTRIAL CO.,LTD.), shaping processing was performed under the conditions of gear pitch 2.5mm, preheating 90°C, gear roll temperature 90°C, and gear roll rotation speed 1m / m. After preparing a fiber bundle of 1200mm and 120g from the processed fiber, the fiber bundle was immersed in the above-mentioned fiber treatment agent to apply the fiber treatment agent to the fiber bundle. After thoroughly removing excess fiber treatment agent from the fiber bundle, the fiber bundle was dried in an oven at 40°C for 6 hours. The fiber bundle was combed to loosen and arrange it to obtain a fiber for evaluation. The total amount of the active ingredient in the fiber for evaluation after drying was adjusted by the number of immersion treatments, etc.

[0116] The amounts of oil and surfactant attached to the surface of the evaluation fiber (unit: mass%) are shown in each table as the content of the active ingredient in the evaluation fiber. The relative amounts of the oil, cationic surfactant, nonionic surfactant 1, and nonionic surfactant 2 in the evaluation fiber tend to be the same as the relative amounts in the fiber treatment agent, so the attached amounts were calculated from the solids extracted from the evaluation fiber by the solvent extraction method using the following formula. In the fiber treatment agent and the evaluation fiber, the ratio of oil to 100 parts by mass of cationic surfactant, the ratio of oil to 100 parts by mass of nonionic surfactant 2, and the ratio of cationic surfactant to 100 parts by mass of nonionic surfactant 1 were as shown in each table. Amount of adhesion [mass%] = (mass of extracted solids [g] / mass of evaluation fiber before extraction [g]) × (amount of active ingredient of evaluation item in fiber treatment agent [mass%] / amount of active ingredients of all ingredients in fiber treatment agent [mass%]) × 100

[0117] In the above-mentioned solvent extraction method, first, 2 g of the fiber for evaluation was weighed into a 300 mL beaker, and then 100 mL of a solvent in which n-hexane and ethanol were mixed in a ratio of 1:1 was added. Next, the mixture was stirred at 1200 rpm for 10 minutes using a magnetic stirrer, and then treated with an ultrasonic cleaner (USC-55Z38S / Ultrasonic Industrial Co., Ltd.) for 10 minutes to obtain an evaluation sample. Then, the evaluation sample was filtered using No. 5A filter paper, and the beaker, evaluation sample, and filter paper were washed with 20 mL of a solvent in which n-hexane and ethanol were mixed in a ratio of 1:1. The volatile matter in the obtained filtrate, including the solvent, moisture, etc., was dried and solidified at 80 ° C. The mass of the dried matter after the moisture was completely removed was obtained as the mass of the extracted solid matter.

[0118] (Example 59) Without stretching the base fiber, the base fiber was shaped in the same manner as described above using a gear machine (NEW YAKI BRAID CRIMPING M / C-2.5mm / SUNG JIN INDUSTRIAL CO.,LTD.) under the conditions of gear pitch 2.5mm, preheating 90°C, gear roll temperature 90°C, and gear roll rotation speed 1m / m. After preparing a fiber bundle of 1200 mm and 120 g from the processed fiber, the fiber bundle was immersed in the above-mentioned fiber treatment agent to apply the fiber treatment agent to the fiber bundle. After thoroughly removing the fiber treatment agent that had adhered to the fiber bundle in excess, the fiber bundle was dried in an oven at 40°C for 6 hours. The fiber bundle was combed to loosen and arrange it to obtain a fiber for evaluation.

[0119] <Evaluation of the fibers used for evaluation> The fibers for evaluation were evaluated for combability, softness, stickiness resistance, odor resistance, and weaving ability. The results are shown in the tables.

[0120] (Combability) The above-mentioned evaluation fibers were unraveled and then bundled again to obtain a fiber bundle of 300 mm in length and 10 g in mass. The fiber bundle was then combed from a position 90 mm from the tip toward the tip at a moving speed of 10 mm / sec and a moving distance of 100 mm, and the maximum resistance force [unit: gf] was measured using a static and dynamic friction measuring device (manufactured by TRINITY-LAB, product name "TL201Tt"). It was determined that the smaller the resistance force, the better the combability.

[0121] (Softness) The above-mentioned evaluation fiber was folded in the middle to obtain a fiber bundle with a length of 600 mm and a mass of 120 g. Ten hair fiber processing technicians (with more than 5 years of practical experience) judged the fiber bundle to be "soft" or "hard" by touch (the softness felt when touching the fiber bundle as if compressing it with the palm) and then judged the softness (before rinsing with water) according to the following criteria. In addition, the fiber bundle was rinsed by immersing it in water and then kneading and squeezing it three times, and then the softness (after rinsing with water) was judged in the same manner. For reference, a fiber bundle was obtained in the same manner using the above-mentioned base fiber (after shaping processing) before applying the fiber treatment agent, and the softness (without rinsing with water) was judged in the same manner. A: 9 or more people rated it as soft B: 5 to 8 people rated it as soft C: 1 to 4 people rated it as soft D: 0 people rated it as soft

[0122] (Anti-stickiness) The above-mentioned evaluation fiber was folded in the middle to obtain a fiber bundle with a length of 600 mm and a mass of 120 g. Ten hair fiber processing technicians (with more than 5 years of practical experience) judged the fiber bundle by touch (degree of stickiness felt when the fiber bundle was pressed with the palm of the hand) into two ranks, "not sticky" and "sticky," and then evaluated the stickiness resistance according to the following criteria. A: 9 or more people rated it as not sticky B: 5 to 8 people rated it as not sticky C: 1 to 4 people rated it as not sticky D: 0 people rated it as not sticky

[0123] (odor resistance) The above-mentioned evaluation fiber was folded in the middle to obtain a fiber bundle with a length of 600 mm and a mass of 120 g, which was then stored at 30°C and 80% RH for 14 days. Ten hair fiber treatment technicians (with 5 years or more of work experience) smelled the evaluation fiber to determine whether or not it gave off a bad odor, and then evaluated the odor resistance according to the following criteria. A: 5 or more people rated it as having a bad odor B: 4 or fewer people rated it as having a bad odor

[0124] (Knitted) After unraveling the above-mentioned evaluation fibers, a fiber bundle (length: 500 mm, mass: 5 g) that becomes thinner toward the tip was obtained using 35% of the fibers with lengths of 100 mm or more and less than 300 mm, 9% of the fibers with lengths of 300 mm or more and less than 350 mm, 28% of the fibers with lengths of 350 mm or more and less than 425 mm, and 28% of the fibers with lengths of 425 mm or more and less than 500 mm. The fiber bundle was then braided, and it was determined whether the tip of the fiber bundle would unravel when the bundle was released. A: The ends will not come undone even if you let go of the braid. B: When you let go of the braid, the ends come undone.

[0125] [Table 1]

[0126] [Table 2]

[0127] [Table 3]

[0128] [Table 4]

[0129] [Table 5]

[0130]

Table 6

[0131]

Table 7

[0132]

Table 8

[0133]

Table 9

Claims

1. The present invention relates to a textile fabric comprising a base fiber, an oil component, a cationic surfactant, a first nonionic surfactant, and a second nonionic surfactant, the oil, the cationic surfactant, the first nonionic surfactant, and the second nonionic surfactant are present on at least a portion of a surface of the base fiber; The oil is at least one selected from the group consisting of triglycerides, fatty acid alkyls, and saturated aliphatic hydrocarbons; The cationic surfactant has a carbon chain having 18 to 22 carbon atoms, the first nonionic surfactant has a carbon chain having 10 to 20 carbon atoms; the first nonionic surfactant has an HLB value of 14.0 to 19.0; the second nonionic surfactant has a carbon chain having 10 to 22 carbon atoms; the second nonionic surfactant has an HLB value of 6.0 or more and less than 14.0; The content of the oil is 0.2 to 600 parts by mass per 100 parts by mass of the cationic surfactant, The content of the oil is 20 to 210 parts by mass per 100 parts by mass of the second nonionic surfactant, the content of the cationic surfactant is 3 to 20 parts by mass relative to 100 parts by mass of the first nonionic surfactant; The total amount of the oil, the cationic surfactant, the first nonionic surfactant, and the second nonionic surfactant is 0.002 to 4 mass% based on the total amount of the hair fiber.

2. 2. The fiber for hair according to claim 1, wherein the base fiber comprises at least one selected from the group consisting of a homopolymer of vinyl chloride, a vinyl chloride-acrylonitrile copolymer, polyethylene terephthalate, a polyamide resin, polypropylene, and an acrylonitrile-styrene copolymer.

3. 3. The hair fiber according to claim 1 or 2, wherein the oil comprises an oil with an iodine value of 165 or less.

4. The hair fiber according to any one of claims 1 to 3, wherein the oil comprises the triglyceride.

5. The hair fiber according to any one of claims 1 to 4, wherein the oil comprises the fatty acid alkyl.

6. The hair fiber according to any one of claims 1 to 5, wherein the oil comprises the aliphatic saturated hydrocarbon.

7. The hair fiber according to any one of claims 1 to 6, wherein the cationic surfactant comprises a quaternary ammonium salt having a cation having a structure represented by the following general formula (1): 【Chemistry 1】 [In formula (1), R １１ represents a group containing a carbon chain having 18 to 22 carbon atoms, R １２ , R １３ and R １４ each independently represents a monovalent group.

8. The cationic surfactant is represented by the general formula (1) R １２ and R １３ 8. The hair fiber of claim 7, comprising a quaternary ammonium salt in which is a methyl group.

9. The fiber for hair according to any one of claims 1 to 8, wherein the first nonionic surfactant and the second nonionic surfactant contain a compound having at least one selected from the group consisting of a structure represented by the following general formula (2a), a structure represented by the following general formula (2b), a structure represented by the following general formula (2c), and a structure represented by the following general formula (2d). 【Chemistry 2】 [In the formula, R ２１ａ , R ２１ｂ , R ２１ｃ and R ２１ｄ each independently represents a hydrophobic portion containing a carbon chain having 10 to 20 carbon atoms in the first nonionic surfactant, represents a hydrophobic portion containing a carbon chain having 10 to 22 carbon atoms in the second nonionic surfactant, R ２２ａ , R ２２ｂ , R ２２ｃ , R ２３ｃ and R ２２ｄ each independently represents a hydrophilic portion, R ２３ｄ indicates a hydrophobic or hydrophilic portion.

10. 10. The hair fiber according to claim 1, wherein the first nonionic surfactant and the second nonionic surfactant comprise a polyoxyalkylene alkyl ether.

11. A hair accessory comprising the hair fiber according to any one of claims 1 to 10.

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