Patent Application
20250066992
The present invention relates to a fiber for hair, a method for producing the same, a fiber treating agent, a headdress article, and the like.
Fibers for hair (fibers used for hair) can be used for headdress articles. In Patent Literature 1 below, a technique of treating a base fiber using a fiber treating agent is disclosed.
From the viewpoint of preventing a user from feeling uncomfortable, the fiber for hair is required to be excellent in combability (case of combing) of a fiber bundle. Furthermore, since softness may deteriorate when the fiber bundle is rinsed with water, the fiber for hair is also required to be excellent in softness after water rinsing.
An object of an aspect of the present invention is to provide a fiber for hair excellent in combability and softness after water rinsing. An object of another aspect of the present invention is to provide a headdress article having such a fiber for hair. An object of still another aspect of the present invention is to provide a fiber treating agent for obtaining such a fiber for hair. An object of still another aspect of the present invention is to provide a method for producing such a fiber for hair.
The present disclosure relates to the following [1] to [9], and the like in some aspects.
According to an aspect of the present invention, a fiber for hair excellent in combability and softness after water rinsing can be provided. According to another aspect of the present invention, a headdress article having such a fiber for hair can be provided. According to still another aspect of the present invention, a fiber treating agent for obtaining such a fiber for hair can be provided. According to still another aspect of the present invention, a method for producing such a fiber for hair can be provided.
Hereinafter, embodiments of the present invention will be described in detail.
The expression “A or more” of a numerical value range means A and a range of more than A. The expression “A or less” of a numerical value range means A and a range of less than A. With regard to a numerical value range described stepwise in the present specification, the upper limit value or the lower limit value of the numerical value range at a certain stage can be optionally combined with the upper limit value or the lower limit value of the numerical value range of another stage. With respect to a numerical value range described in the present specification, the upper limit value or the lower limit value of the numerical value range may be substituted with the values shown in Experimental Examples. The expression “A or B” may include either A or B or may include both of them. Unless particularly stated otherwise, the materials described as examples in the present specification can be used singly or in combination of two or more kinds thereof. In a case where a plurality of substances corresponding to each component in a composition is present, unless particularly stated otherwise, the content of each component in the composition means the total amount of the plurality of substances present in the composition. The term “step” means not only an independent step, but even in a case where a step cannot be clearly distinguished from another step, the step is included in the present term as long as the predetermined action of the step is achieved. The term “(meth)acrylic acid” means at least one of acrylic acid and methacrylic acid corresponding thereto. A “polyoxyalkylene group” and an “oxyalkylene group” are collectively referred to as a “(poly)oxyalkylene group”. The same applies to other expressions including “(poly)”.
A fiber for hair of the present embodiment has a base fiber, and a cationic surfactant and a nonionic surfactant which are present in at least a part of a surface of the base fiber, in which the cationic surfactant has a carbon chain having 18 to 22 carbon atoms, the nonionic surfactant has a carbon chain having 10 to 20 carbon atoms, an HLB value of the nonionic surfactant is 14.0 to 19.0, a content of the cationic surfactant is 3 to 20% by mass based on the total amount of the nonionic surfactant, and a total amount of the cationic surfactant and the nonionic surfactant is 0.002 to 4% by mass based on the total amount of the fiber for hair.
A fiber treating agent of the present embodiment contains a cationic surfactant, a nonionic surfactant, and water, in which the cationic surfactant has a carbon chain having 18 to 22 carbon atoms, the nonionic surfactant has a carbon chain having 10 to 20 carbon atoms, an HLB value of the nonionic surfactant is 14.0 to 19.0, a content of the cationic surfactant is 3 to 20% by mass based on the total amount of the nonionic surfactant, and a total amount of the cationic surfactant and the nonionic surfactant is 0.1 to 40% by mass based on the total amount of the fiber treating agent. Hereinafter, in some cases, the cationic surfactant having a carbon chain having 18 to 22 carbon atoms is referred to as “cationic surfactant A”, and the nonionic surfactant having a carbon chain having 10 to 20 carbon atoms and having an HLB value of 14.0 to 19.0 is referred to as “nonionic surfactant B”.
The fiber for hair of the present embodiment is excellent in combability and softness after water rinsing. According to the fiber treating agent of the present embodiment, the fiber for hair of the present embodiment can be obtained, and a fiber for hair excellent in combability and softness after water rinsing can be obtained. For the combability, according to the fiber for hair and the fiber treating agent of the present embodiment, in evaluation in Examples described later, combing resistive force can be reduced to, for example, 340 gf or less (preferably 290 gf or less or 240 gf or less).
One embodiment of the fiber for hair of the present embodiment is excellent in softness before water rinsing. Another embodiment of the fiber for hair of the present embodiment is excellent in stickiness resistance (can reduce stickiness). According to one embodiment of the fiber treating agent of the present embodiment, a fiber for hair excellent in softness before water rinsing can be obtained, and a fiber for hair excellent in stickiness resistance can be obtained. The factors are not limited, but it is presumed that stickiness due to the fact that the cationic surfactant A is agglomerated and present in the surface of the base fiber is suppressed by using the nonionic surfactant B in addition to the cationic surfactant A. Another embodiment of the fiber treating agent of the present embodiment is excellent in dispersibility (dispersion stability), and in evaluation in Examples described later, a component (mainly, the cationic surfactant), which was solid before being added to water, is dispersed overall in a colloidal shape (the fiber treating agent is in a one-phase state).
The fiber for hair of the present embodiment can be used as hair (for example, artificial hair) and can also be used in order to obtain hair (for example, artificial hair). The fiber for hair of the present embodiment may be a fiber obtained after a stretching treatment, and may be an unstretched fiber. The single fiber fineness of the fiber for hair of the present embodiment may be 20 to 100 decitex after a stretching treatment.
Examples of the base fiber material in the fiber for hair of the present embodiment include a vinyl chloride-based resin, a polyester-based resin, a polyamide-based resin, a polyolefin-based resin, an ethylene-vinyl acetate copolymer (EVA), an acrylonitrile-butadiene rubber (NBR), a thermoplastic polyurethane (TPU), a polyester-based thermoplastic elastomer (TPEE), a methyl methacrylate-butadiene-styrene resin (MBS), an acrylonitrile-butadiene-styrene resin (ABS), an acrylonitrile-styrene copolymer (AS), polymethyl methacrylate (PMMA), and a human hair material (for example, keratin). 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 be more than 50% by mass based on the total amount of the base fiber.
The vinyl chloride-based 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-based resin can be obtained by bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization, or the like, and may be obtained by suspension polymerization from the viewpoint of excellent initial colorability of fibers or the like. The base fiber may contain a mixture of a vinyl chloride-based resin and a component (for example, an acrylonitrile-styrene copolymer) that can form a polymer alloy with the vinyl chloride-based resin.
Examples of the vinyl chloride-based resin include a homopolymer of vinyl chloride (homopolymer, polyvinyl chloride) and copolymers of vinyl chloride and other monomer, and a mixture thereof may be used. Examples of the copolymers of vinyl chloride and other monomer include a copolymer of vinyl chloride and vinyl esters (such as a vinyl chloride-vinyl acetate copolymer and a vinyl chloride-vinyl propionate copolymer); a copolymer of vinyl chloride and a (meth)acrylic acid compound (such as (meth)acrylic acid and a (meth)acrylic acid ester) (such as a vinyl chloride-butyl acrylate copolymer and a vinyl chloride-2-ethylhexyl acrylate copolymer); a copolymer of vinyl chloride and olefins (such as a vinyl chloride-ethylene copolymer and a vinyl chloride-propylene copolymer); and a vinyl chloride-acrylonitrile copolymer. The vinyl chloride-based resin may not have a structural unit derived from a (meth)acrylic acid compound. In the copolymer, the content of the monomer different from vinyl chloride can be determined according to required qualities such as molding processability and fiber characteristics. From the viewpoint of easily obtaining excellent combability, softness (before and after water rinsing), and stickiness resistance, the vinyl chloride-based resin may include at least one selected from the group consisting of a homopolymer of vinyl chloride and a vinyl chloride-acrylonitrile copolymer.
Examples of the polyester-based resin include polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene-2,6-naphthalate, polymethylene terephthalate, and glycol-modified polyethylene terephthalate (PETG).
Examples of the polyamide-based resin include nylon 6, nylon 66, nylon 11, nylon 12, nylon 6/10, and nylon 6/12.
Examples of the polyolefin-based resin include polyethylene (PE) and polypropylene (PP).
From the viewpoint of easily obtaining excellent combability, softness (before and after water rinsing), and stickiness resistance, the base fiber may contain at least one selected from the group consisting of a vinyl chloride-based resin, a polyester-based resin, a polyamide-based resin, a polyolefin-based resin, an acrylonitrile-styrene copolymer, and a human hair material, may contain at least one selected from the group consisting of a vinyl chloride-based resin, a polyester-based resin, a polyamide-based resin, a polyolefin-based resin, and an acrylonitrile-styrene copolymer, and may contain at least one selected from the group consisting of a homopolymer of vinyl chloride, a vinyl chloride-acrylonitrile copolymer, polyethylene terephthalate, a polyamide-based resin, polypropylene, and an acrylonitrile-styrene copolymer.
The base fiber may contain a material (hereinafter, referred to as “artificial hair material”) different from a human hair material (for example, keratin). Incidentally, for a headdress article having a base fiber containing an artificial hair material, a user demands human hair-like handling property (weaving efficiency at the time of braiding hair into three strands, or the like) or tactile sensation (softness, combability, or the like). However, even when the base fiber containing an artificial hair material is treated using a component contained in a hair care product (a hair conditioner, a hair treatment, or the like) used to improve human hairs, there is a case where handling property or tactile sensation is not improved to the same extent as human hair. Therefore, in order to improve the base fiber containing an artificial hair material, a method suitable for an artificial hair material is required. On the other hand, in the fiber for hair of the present embodiment, even in the case of using an artificial hair material, excellent handling property (weaving efficiency at the time of braiding hair into three strands, or the like) can be obtained while obtaining excellent tactile sensation.
The content of the artificial hair material or the 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 an embodiment composed of only 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).
The content of the vinyl chloride-based resin, the polyester-based resin, the polyamide-based resin, the polyolefin-based resin, or the acrylonitrile-styrene copolymer 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 an embodiment composed of only a vinyl chloride-based resin, a polyester-based resin, a polyamide-based resin, a polyolefin-based resin, or an acrylonitrile-styrene copolymer (substantially 100% by mass of the base fiber is a vinyl chloride-based resin, a polyester-based resin, a polyamide-based resin, a polyolefin-based resin, or an acrylonitrile-styrene copolymer). The content of the 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.
From the viewpoint that the stretch ratio can be made small in order to obtain a fiber for hair with a finer fiber degree, the average fineness of the base fibers at the time of being unstretched may be 300 decitex or less, 200 decitex or less, or 100 decitex or less.
The fiber for hair of the present embodiment has a cationic surfactant A and a nonionic surfactant B which are present in at least a part of a surface of the base fiber. The cationic surfactant A and the nonionic surfactant B may be present at the mutually same place and may be present at mutually different places on the surface of the base fiber. The fiber treating agent of the present embodiment contains the cationic surfactant A and the nonionic surfactant B.
The cationic surfactant A has a carbon chain (hereinafter, referred to as “carbon chain A”) having 18 to 22 carbon atoms, and the nonionic surfactant B has a carbon chain (hereinafter, referred to as “carbon chain B”) having 10 to 20 carbon atoms. The “carbon chain” is a molecular chain formed by continuous bonding of carbon atoms, and for example, the “carbon chain having 18 to 22 carbon atoms” is a molecular chain formed by continuous bonding of 18 to 22 carbon atoms. The “carbon chain” may be linear, branched, or cyclic. The “carbon chain” may have an unsaturated bond or may not have an unsaturated bond.
In the fiber for hair and the fiber treating agent of the present embodiment, at least one type of the cationic surfactant A having a carbon chain A and at least one type of the nonionic surfactant B having a carbon chain B are present. In the fiber for hair and the fiber treating agent of the present embodiment, in a case where the cationic surfactant A having a carbon chain A and a cationic surfactant not having a carbon chain A are present, the ratio of the cationic surfactant A having a carbon chain A may be 50% by mass or more and may be more than 50% by mass based on the total amount of the cationic surfactants (the total amount of the cationic surfactant A and the cationic surfactant not corresponding to the cationic surfactant A). In the fiber for hair and the fiber treating agent of the present embodiment, in a case where the nonionic surfactant B having a carbon chain B and a nonionic surfactant not having a carbon chain B are present, the ratio of the nonionic surfactant B having a carbon chain B may be 50% by mass or more and may be more than 50% by mass based on the total amount of the nonionic surfactants (the total amount of the nonionic surfactant B and the nonionic surfactant not corresponding to the nonionic surfactant B).
When the number of carbon atoms of the carbon chain A is 18 or more, excellent softness (after water rinsing) can be obtained. The factors are not limited, but it is presumed that, when the number of carbon atoms of the carbon chain A is 18 or more, the cationic surfactant A is difficult to flow off when rinsing with water, so that excellent softness (after water rinsing) can be obtained. When the number of carbon atoms of the carbon chain A is 22 or less, excellent combability can be obtained, and excellent stickiness resistance and excellent dispersibility of the fiber treating agent are easily obtained. When the number of carbon atoms of the carbon chain B is 10 or more, excellent combability can be obtained, and excellent stickiness resistance and excellent dispersibility of the fiber treating agent are easily obtained. When the number of carbon atoms of the carbon chain B is 20 or less, excellent combability can be obtained, and excellent stickiness resistance and excellent dispersibility of the fiber treating agent are easily obtained.
From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the number of carbon atoms of the carbon chain A in the cationic surfactant A may be 19 or more, 20 or more, or 21 or more. From the viewpoint of suitably adjusting combability, the number of carbon atoms of the carbon chain A may be 21 or less, 20 or less, or 19 or less. From these viewpoints, the number of carbon atoms of the carbon chain A may be 18 to 20 or 20 to 22.
The 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 cations. Examples of the cationic surfactant A include a quaternary ammonium salt, an amine salt, a pyridinium salt, and an imidazolinium salt. Examples of the salt include a halide salt, and examples thereof include a chloride salt, a bromide salt, and an iodide salt.
Examples of the quaternary ammonium salt include an aliphatic quaternary ammonium salt, an aromatic quaternary ammonium salt (excluding a heterocyclic quaternary ammonium salt), and a heterocyclic quaternary ammonium salt. Examples of the amine salt include an aliphatic amine salt, and examples thereof include a monoalkylamine salt, a dialkylamine salt, and a trialkylamine salt.
From the viewpoint of easily obtaining excellent combability, softness (before and after water rinsing), and stickiness resistance, the cationic surfactant A may include a quaternary ammonium salt, and may include a quaternary ammonium salt as a chloride salt (quaternary ammonium salt having a chloride ion as a counter anion).
From the viewpoint of easily obtaining excellent combability, softness (before and after water rinsing), and stickiness resistance, the cationic surfactant A may include a compound having a cation with a structure represented by General Formula (1) below, and may include a quaternary ammonium salt having a cation with a structure represented by General Formula (1) below.
[In Formula (1), R11 represents a group containing a carbon chain having 18 to 22 carbon atoms, and R12, R13, and R14 each independently represent a monovalent group.]
Examples of R1 include an alkyl group having 18 to 22 carbon atoms. Examples of the monovalent group of R12, R13, and R14 include a hydrogen atom and a group containing a carbon atom (may contain an atom other than the carbon atom). In the quaternary ammonium salt, R12, R13, and R14 may each independently be a group containing a carbon atom.
Examples of the group containing a carbon atom 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, softness (before and after water rinsing), and stickiness resistance, 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 combability, softness (before and after water rinsing), and stickiness resistance, the aryl group may be a benzyl group.
From the viewpoint of easily obtaining excellent combability, softness (before and after water rinsing), and stickiness resistance, the cationic surfactant A may satisfy at least one of the following conditions.
The cationic surfactant A may include a quaternary ammonium salt in which at least one selected from the group consisting of R12 and R13 is an alkyl group or an aryl group in General Formula (1), and may include a quaternary ammonium salt in which at least one selected from the group consisting of R12, R13, and R14 is an alkyl group or an aryl group in General Formula (1).
The cationic surfactant A may include a quaternary ammonium salt in which at least one selected from the group consisting of R12 and R13 is a methyl group or a benzyl group in General Formula (1), and may include a quaternary ammonium salt in which at least one selected from the group consisting of R12, R13, and R14 is a methyl group or a benzyl group in General Formula (1).
The cationic surfactant A may include a quaternary ammonium salt in which R12 and R13 are a methyl group in General Formula (1), may include a quaternary ammonium salt in which R12, R13, and R14 are a methyl group in General Formula (1), and may include a quaternary ammonium salt in which R12 and R13 are a methyl group and R14 is a benzyl group in General Formula (1).
From the viewpoint of easily obtaining excellent combability, softness (before and after water rinsing), and stickiness resistance, the cationic surfactant A may include at least one selected from the group consisting of stearyltrimethylammonium chloride, oleyltrimethylammonium chloride, nonadecyltrimethylammonium chloride, icosyltrimethylammonium chloride, heneicosyltrimethylammonium chloride, behenyltrimethylammonium chloride, stearyldimethylbenzylammonium chloride, oleyldimethylbenzylammonium chloride, nonadecyldimethylbenzylammonium chloride, icosyldimethylbenzylammonium chloride, heneicosyldimethylbenzylammonium chloride, and behenyldimethylbenzylammonium chloride, and may include at least one selected from the group consisting of stearyltrimethylammonium chloride, stearyldimethylbenzylammonium chloride, and behenyltrimethylammonium chloride.
From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the number of carbon atoms of the carbon chain B in the nonionic surfactant B may be 12 or more, 14 or more, 16 or more, or 18 or more. From the viewpoint of easily obtaining excellent combability, the number of carbon atoms of the carbon chain B may be 18 or less, 16 or less, 14 or less, or 12 or less. From these viewpoints, the number of carbon atoms of the carbon chain B may be 10 to 18, 10 to 16, 10 to 14, 10 to 12, 12 to 20, 12 to 18, 12 to 16, or 12 to 14.
The nonionic surfactant B is a surfactant not having a group that dissociates into ions in water. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the nonionic surfactant B may satisfy at least one of the following conditions.
The nonionic surfactant B may include at least one selected from the group consisting of polyoxyalkylene alkyl ether, fatty acid monoalkanolamide, fatty acid dialkanolamide, polyoxyalkylene dialkylamine, dipolyoxyalkylene alkylamine, and polyoxyalkylene fatty acid ester.
The nonionic surfactant B may include polyoxyalkylene alkyl ether, and may include 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 B may include at least one selected from the group consisting of fatty acid monoalkanolamide and fatty acid dialkanolamide, and may include coconut oil fatty acid diethanolamide.
The nonionic surfactant B may include at least one selected from the group consisting of polyoxyalkylene dialkylamine and dipolyoxyalkylene alkylamine, and may include dipolyoxyethylene lauryl amine.
The nonionic surfactant B may include polyoxyalkylene fatty acid ester, and may include polyoxyethylene lauric acid ester.
From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the nonionic surfactant B may include at least one selected from the group consisting of an ether compound, an ester compound, an amide compound, and an amine compound, and may include a compound having at least one selected from the group consisting of a structure represented by General Formula (2a) below, a structure represented by General Formula (2b) below, a structure represented by General Formula (2c) below, and a structure represented by General Formula (2d) below.
[In the formula, R21a, R21b, R21c, and R21d each independently represent a hydrophobic moiety containing a carbon chain (carbon chain B) having 10 to 20 carbon atoms, R22a, R22b, R22c, R22c, and R22d each independently represent a hydrophilic moiety, and R23d represents a hydrophobic moiety or a hydrophilic moiety.]
Examples of the hydrophobic moiety containing a carbon chain (carbon chain B) having 10 to 20 carbon atoms include a hydrocarbon group such as an alkyl group. The hydrocarbon group (an alkyl group or the like) may be linear, branched, or cyclic.
The hydrophilic moiety may be a group having a hydrophilic group, or a hydrophilic group. Examples of the hydrophilic group include a (poly)oxyalkylene group, a hydroxyl group, a carboxy group, a carboxylate group, a phosphoric group, a phosphate group, a sulfonic group, and a sulfonate group. Examples of the (poly)oxyalkylene group include a (poly)oxyethylene group and a (poly)oxypropylene group.
From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the nonionic surfactant B may include at least one selected from the group consisting of polyoxyethylene decyl ether, polyoxyethylene lauryl ether, polyoxyethylene lauric acid ester, dipolyoxyethylene lauryl amine, polyoxyethylene cetyl ether, coconut oil fatty acid diethanolamide, and polyoxyethylene stearyl ether.
The HLB value of the nonionic surfactant B is 14.0 to 19.0. That is, in the fiber for hair and the fiber treating agent of the present embodiment, at least one type of nonionic surfactant B having an HLB value of 14.0 to 19.0 is present. When the HLB value of the nonionic surfactant B is 14.0 or more, excellent combability can be obtained, and excellent stickiness resistance and excellent dispersibility of the fiber treating agent are easily obtained. When the HLB value of the nonionic surfactant B is 19.0 or less, excellent combability can be obtained, and excellent stickiness resistance and excellent dispersibility of the fiber treating agent are easily obtained. In the fiber for hair and the fiber treating agent of the present embodiment, a plurality of nonionic surfactants B each having a different HILB value may be present.
The HLB value of the nonionic surfactant B 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. The HLB value of the nonionic surfactant B may be 17.5 or more, 18.0 or more, 18.3 or more, or 18.5 or more. The HLB value of the nonionic surfactant B may be 18.5 or less, 18.3 or less, 18.0 or less, 17.5 or less, or 17.4 or less. The HLB value of the nonionic surfactant B 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 these viewpoints, the HLB value of the nonionic surfactant B may be 15.0 to 19.0, 15.0 to 18.5, 16.0 to 18.5, 15.0 to 18.0, 16.0 to 18.0, 16.5 to 18.0, or 17.0 to 18.0. The HLB value of the nonionic surfactant B can be calculated based on the Griffin method using the formula weight of the hydrophilic moiety and the molecular weight of the nonionic surfactant B, and for example, can be calculated based on the Griffin method through molecular weight measurement by GPC, structure identification by NMR, or the like after extracting the nonionic surfactant B as a measurement target. The HLB value of the nonionic surfactant B can be adjusted, for example, by the length of the hydrophilic moiety ((poly)oxyalkylene group or the like).
In the fiber for hair and the fiber treating agent of the present embodiment, the content of the cationic surfactant A is 3 to 20% by mass based on the total amount of the nonionic surfactant B. When the content of the cationic surfactant A is 3% by mass or more, excellent softness (after water rinsing) can be obtained. When the content of the cationic surfactant A is 20% by mass or less, excellent combability can be obtained, and excellent stickiness resistance and excellent dispersibility of the fiber treating agent are easily obtained. The ratio of the cationic surfactant with respect to the nonionic surfactant can be measured using NMR, GC-MS, HPLC, or the like. The ratio of the cationic surfactant with respect to the nonionic surfactant in the fiber for hair tends to be equal to the ratio in the fiber treating agent.
From the viewpoint of suitably adjusting combability, softness (before and after water rinsing), and stickiness resistance, the content of the cationic surfactant A may be in the following range based on the total amount of the nonionic surfactant B. The content of the cationic surfactant A may be 4% by mass or more, 5% by mass or more, 6% by mass or more, 8% by mass or more, 10% by mass or more, 12% by mass or more, 15% by mass or more, 16% by mass or more, 17% by mass or more, 18% by mass or more, or 19% by mass or more. The content of the cationic surfactant A may be 19% by mass or less, 18% by mass or less, 17% by mass or less, 16% by mass or less, 15% by mass or less, 12% by mass or less, 10% by mass or less, 8% by mass or less, 6% by mass or less, 5% by mass or less, or 4% by mass or less. From these viewpoints, the content of the cationic surfactant A may be 4 to 19% by mass, 4 to 17% by mass, 4 to 15% by mass, 5 to 19% by mass, 8 to 19% by mass, 5 to 17% by mass, or 8 to 15% by mass.
In the fiber for hair of the present embodiment, the total amount of the cationic surfactant A and the nonionic surfactant B is 0.002 to 4% by mass based on the total amount of the fiber for hair. When the total amount is 0.002% by mass or more, excellent combability and softness (after water rinsing) can be obtained, and excellent softness (before water rinsing) is easily obtained. When the total amount is 4% by mass or less, excellent combability can be obtained, and excellent stickiness resistance is easily obtained.
In the fiber for hair of the present embodiment, the total amount of the cationic surfactant A and the nonionic surfactant B may be in the following range based on the total amount of the fiber for hair. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the total amount may be 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 easily obtaining excellent softness (before and after water rinsing), 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, or 1.8% 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, or 0.02% by mass or less. From these viewpoints, the total amount may be 0.005 to 3% by mass, 0.01 to 2% by mass, 0.02 to 1.8% by mass, 0.1 to 1.8% by mass, 0.02 to 1.5% by mass, 0.1 to 1.5% by mass, 0.5 to 1.5% by mass, or 0.8 to 1.2% by mass.
In the fiber for hair of the present embodiment, the content of the cationic surfactant A is more than 0% by mass based on the total amount of the fiber for hair, and may be in the following range. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), 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, or 0.09% by mass or more. From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the content of the cationic surfactant A may be 0.1% by mass or more, 0.12% by mass or more, 0.13% by mass or more, 0.14% by mass or more, 0.15% by mass or more, 0.16% by mass or more, 0.2% by mass or more, 0.25% by mass or more, 0.3% by mass or more, 0.35% by mass or more, or 0.36% by mass or more. From the viewpoint of easily obtaining excellent combability and stickiness resistance, the content of the cationic surfactant A may be 0.5% by mass or less, 0.45% by mass or less, 0.4% by mass or less, 0.36% by mass or less, 0.35% by mass or less, 0.3% by mass or less, 0.25% by mass or less, 0.2% by mass or less, 0.16% by mass or less, 0.15% by mass or less, 0.14% by mass or less, 0.13% by mass or less, 0.12% by mass or less, 0.1% by mass or less, or 0.09% by mass or less. From the viewpoint of easily obtaining excellent stickiness resistance, the content of the cationic surfactant A may be 0.07% by mass or less, 0.05% by mass or less, 0.03% by mass or less, 0.02% by mass or less, 0.01% by mass or less, 0.008% by mass or less, 0.005% by mass or less, 0.003% by mass or less, 0.002% by mass or less, 0.001% by mass or less, 0.0008% by mass or less, 0.0005% by mass or less, 0.0003% by mass or less, or 0.0002% by mass or less. From these viewpoints, the content of the cationic surfactant A may be more than 0% by mass and 0.5% by mass or less, 0.0001 to 0.5% by mass, 0.0002 to 0.5% by mass, 0.001 to 0.5% by mass, 0.002 to 0.2% by mass, 0.005 to 0.2% by mass, 0.05 to 0.2% by mass, 0.05 to 0.1% by mass, or 0.07 to 0.2% by mass.
In the fiber for hair of the present embodiment, the content of the nonionic surfactant B is more than 0% by mass based on the total amount of the fiber for hair, and may be in the following range. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the content of the nonionic surfactant B may be 0.0001% by mass or more, 0.0002% by mass or more, 0.0005% by mass or more, 0.0008% by mass or more, 0.001% by mass or more, 0.005% by mass or more, 0.01% by mass or more, 0.015% 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, 0.4% by mass or more, 0.45% by mass or more, 0.5% by mass or more, 0.7% by mass or more, or 0.9% by mass or more. From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the content of the nonionic surfactant B may be 1% by mass or more, 1.2% by mass or more, 1.3% by mass or more, 1.4% by mass or more, 1.5% by mass or more, 1.6% by mass or more, 1.7% 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 content of the nonionic surfactant B may be 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, 1.8% by mass or less, 1.7% by mass or less, 1.6% by mass or less, 1.5% by mass or less, 1.4% by mass or less, 1.3% 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 content of the nonionic surfactant B may be 0.9% by mass or less, 0.7% by mass or less, 0.5% by mass or less, 0.45% 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, 0.08% by mass or less, 0.05% by mass or less, 0.03% by mass or less, 0.02% by mass or less, 0.015% by mass or less, 0.01% by mass or less, 0.005% by mass or less, 0.001% by mass or less, 0.0008% by mass or less, 0.0005% by mass or less, or 0.0002% by mass or less. From these viewpoints, the content of the nonionic surfactant B may be more than 0% by mass and 5% by mass or less, 0.01 to 5% by mass, 0.1 to 5% by mass, 0.1 to 1.5% by mass, 0.5 to 1.5% by mass, or 0.5 to 1.3% by mass.
In the fiber treating agent of the present embodiment, the total amount of the cationic surfactant A and the nonionic surfactant B is 0.1 to 40% by mass based on the total amount of the fiber treating agent. When the total amount is 0.1% by mass or more, excellent combability and softness (after water rinsing) can be obtained, and excellent softness (before water rinsing) is easily obtained. When the total amount is 40% by mass or less, excellent combability can be obtained, and excellent stickiness resistance is easily obtained.
In the fiber treating agent of the present embodiment, the total amount of the cationic surfactant A and the nonionic surfactant B may be in the following range based on the total amount of the fiber treating agent. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the total amount may be 0.3% 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, 6% by mass or more, 6.5% by mass or more, 7% by mass or more, 7.5% by mass or more, 8% by mass or more, 8.5% by mass or more, 9% by mass or more, or 9.5% by mass or more. From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the total amount may be 10% by mass or more, 15% by mass or more, 20% by mass or more, 25% by mass or more, 30% by mass or more, 35% by mass or more, or 37% by mass or more. From the viewpoint of easily obtaining excellent combability and stickiness resistance, the total amount may be 38% by mass or less, 37% by mass or less, 35% by mass or less, 30% by mass or less, 25% by mass or less, 20% by mass or less, 15% by mass or less, or 10% by mass or less. From the viewpoint of easily obtaining excellent stickiness resistance, the total amount may be 9.5% by mass or less, 9% by mass or less, 8.5% by mass or less, 8% by mass or less, 7.5% by mass or less, 7% by mass or less, 6.5% by mass or less, 6% by mass or less, 5% by mass or less, 3% by mass or less, 1% by mass or less, or 0.5% by mass or less. From these viewpoints, the total amount may be 0.5 to 40% by mass, 1 to 38% by mass, 1 to 30% by mass, 1 to 15% by mass, 5 to 38% by mass, 8 to 38% by mass, 5 to 30% by mass, or 5 to 15% by mass.
In the fiber treating agent of the present embodiment, the content of the cationic surfactant A is more than 0% by mass based on the total amount of the fiber treating agent, and may be in the following range. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the content of the cationic surfactant A may be 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, 0.8% by mass or more, or 0.9% by mass or more. From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the content of the cationic surfactant A may be 1% by mass or more, 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, 2.7% by mass or more, 3% by mass or more, or 3.4% by mass or more. From the viewpoint of easily obtaining excellent combability and stickiness resistance, the content of the cationic surfactant A may be 5% by mass or less, 4.5% by mass or less, 4% by mass or less, 3.5% by mass or less, 3.4% by mass or less, 3% by mass or less, 2.7% 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 content of the cationic surfactant A may be 0.9% by mass or less, 0.8% 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, or 0.05% by mass or less. From these viewpoints, the content of the cationic surfactant A may be more than 0% by mass and 5% by mass or less, 0.05 to 5% by mass, 0.1 to 5% by mass, 0.1 to 4% by mass, 0.1 to 3% by mass, 0.1 to 2% by mass, 0.5 to 2% by mass, or 0.1 to 1% by mass.
In the fiber treating agent of the present embodiment, the content of the nonionic surfactant B is more than 0% by mass based on the total amount of the fiber treating agent, and may be in the following range. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the content of the nonionic surfactant B may be 0.1% by mass or more, 0.4% 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, 5% by mass or more, 6% by mass or more, 7% by mass or more, 8% by mass or more, 8.5% by mass or more, or 9% by mass or more. From the viewpoint of easily obtaining excellent softness (before and after water rinsing), the content of the nonionic surfactant B may be 9.5% by mass or more, 10% by mass or more, 12% by mass or more, 14% by mass or more, 15% by mass or more, 16% by mass or more, 18% by mass or more, 20% by mass or more, 25% by mass or more, 27% by mass or more, 30% by mass or more, or 34% by mass or more. From the viewpoint of easily obtaining excellent combability and stickiness resistance, the content of the nonionic surfactant B may be less than 40% by mass, 35% by mass or less, 34% by mass or less, 30% by mass or less, 27% 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, or 9.5% by mass or less. From the viewpoint of easily obtaining excellent stickiness resistance, the content of the nonionic surfactant B may be 9% by mass or less, 8.5% by mass or less, 8% by mass or less, 7% by mass or less, 6% by mass or less, 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, 1% by mass or less, or 0.5% by mass or less. From these viewpoints, the content of the nonionic surfactant B may be more than 0% by mass and less than 40% by mass, 0.1% by mass or more and less than 40% by mass, 1 to 35% by mass, 5 to 35% by mass, 5 to 30% by mass, 5 to 20% by mass, 5 to 15% by mass, or 1 to 10% by mass.
In the fiber treating agent of the present embodiment, the content of water may be in the following range based on the total amount of the fiber treating agent. From the viewpoint of easily obtaining excellent combability and stickiness resistance, the content of water 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, the content of water may be 92% by mass or more, 93% by mass or more, 93.5% by mass or more, 94% by mass or more, 95% by mass or more, 97% by mass or more, 99% by mass or more, or 99.5% by mass or more. From the viewpoint of easily obtaining excellent combability and softness (before and after water rinsing), the content of water 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 softness (before and after water rinsing), the content of water may be 85% by mass or less, 80% by mass or less, 75% by mass or less, 70% by mass or less, 65% by mass or less, or 62% by mass or less. From these viewpoints, the content of water may be 60 to 99.9% by mass, 62 to 99% by mass, 70 to 99% by mass, 85 to 99% by mass, 62 to 95% by mass, 62 to 92% by mass, 70 to 95% by mass, or 85 to 95% by mass.
The fiber for hair of the present embodiment may have other additive (a component not corresponding to the cationic surfactant A or the nonionic surfactant B) present in at least a part of the surface of the base fiber, and the fiber treating agent of the present embodiment may contain other additive (a component not corresponding to the cationic surfactant A or the nonionic surfactant B). Examples of such an additive include a cationic surfactant not corresponding to the cationic surfactant A, a nonionic surfactant not corresponding to the nonionic surfactant B, an antibacterial processing agent, a deodorant processing agent, an antifungal processing agent, a UV cutting agent, a softener, an SR processing agent, an aromatic processing agent, a flame retardant, an antifoaming agent, and fragrance. In the fiber for hair of the present embodiment, at least one selected from the group consisting of zeolite and zirconium carbide may not be present in 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 of the present embodiment, an alcohol composed only of a carbon atom, a hydrogen atom, and an oxygen atom may not be present in the surface of the base fiber, and the fiber treating agent of the present embodiment may not contain an alcohol composed only of a carbon atom, a hydrogen atom, and an oxygen atom.
In a method for producing a fiber for hair of the present embodiment, the fiber treating agent of the present embodiment is brought into contact with a surface of a base fiber. That is, the method for producing a fiber for hair of the present embodiment includes a fiber treating step of bringing the fiber treating agent of the present embodiment into contact with a surface of a base fiber. In the fiber treating step, the fiber treating agent in a one-phase state can be brought into contact with a surface of a base fiber.
In the fiber treating step, the fiber treating 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. Examples thereof include a means for applying the fiber treating agent to the base fiber by a roll having a surface to which the fiber treating agent has been attached (roll transfer method); a means for immersing the base fiber in a liquid tank storing the fiber treating agent; and a means for attaching the fiber treating agent to the base fiber with an applicator such as a brush and a paint brush.
The method for producing a fiber for hair of the present embodiment may include a spinning step of spinning a composition containing a base fiber material to obtain a base fiber, before the fiber treating step. In the spinning step, the composition containing a base fiber material can be subjected to melt-spinning (melt-deformation).
The method for producing a fiber for hair of the present embodiment may include a kneading step of melt-kneading a composition containing a base fiber material, before the spinning step. As an apparatus for performing melt-kneading, various general kneading machines can be used. Examples of the kneading machine include a single-screw extruder, a twin-screw extruder, a roll, a Banbury mixer, and a kneader.
The method for producing a fiber for hair of the present embodiment may include a stretching step of subjecting the fiber (unstretched fiber) obtained in the spinning step to a stretching treatment, before the fiber treating step.
From the viewpoint that the strength development of the fiber is likely to occur, the stretch ratio in the stretching step may be 1.5 times or more or 2.0 times or more. From the viewpoint that fiber breakage is less likely to occur at the time of the stretching treatment, the stretch ratio may be 5.0 times or less or 4.0 times or less. From these viewpoints, the stretch ratio may be 1.5 to 5.0 times or 2.0 to 4.0 times.
The stretching treatment may be carried out by a two-step method in which an unstretched fiber is first wound on a bobbin and then stretched in a step that is not continuous with the spinning step, or may be carried out by a direct spinning stretching method in which an unstretched fiber is stretched in a step continuous with the spinning step without being wound on a bobbin. The stretching treatment may be carried out by a one-stage stretching method of performing stretching once to a desired stretch ratio or may be carried out by a multistage stretching method of performing stretching to a desired stretch ratio by two or more times of stretching.
The temperature of the stretching treatment may be 80° C. to 120° C. When the temperature is 80° C. or higher, the strength of the fiber is likely to be sufficiently secured and fiber breakage is less likely to occur. When the temperature is 120° C. or lower, a suitable tactile sensation of the fiber is likely to be obtained.
The method for producing a fiber for hair of the present embodiment may include a heat treatment step of heat-treating (annealing) the fiber (stretched fiber) obtained in the stretching step, after the stretching step. By performing the heat treatment step, the thermal shrinkage rate of the stretched fiber can be decreased.
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 carried out continuously after the stretching treatment and may be carried out after a while after winding the stretched fiber once.
A headdress article of the present embodiment has the fiber for hair of the present embodiment. The headdress article of the present embodiment is an article that is wearable on and removable from the head portion, and the headdress article may be an embodiment composed of the fiber for hair of the present embodiment (for example, a fiber bundle of the fiber for hair). Examples of the headdress article include hairpieces, hair wigs, hair pieces, braid, hair extension hair, and attached hair.
Hereinafter, the present invention will be more specifically described by way of Examples; however, the present invention is not intended to be limited to these Examples.
The following fibers were prepared as base fibers.
Base fiber A: Fiber using polyvinyl chloride (TAIYO VINYL CORPORATION, trade name “TH-700”), a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a solution spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber B: Fiber using a mixture of polyvinyl chloride (TAIYO VINYL CORPORATION, trade name “TH-700”) and an acrylonitrile-styrene copolymer (Denka Company Limited, trade name “GR-AT-6S”), polyvinyl chloride content: 50% by mass or more, acrylonitrile-styrene copolymer content: 30% by mass, a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a solution spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber C: Fiber using an acrylonitrile-styrene copolymer (Denka Company Limited, trade name “GR-AT-6S”), a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a solution spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber D: Fiber using PET (Mitsui Chemicals, Inc., trade name “JI25S”), a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a melt-spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber E: Fiber using a polyamide-based resin (Asahi Kasei Chemicals, trade name “LEONA 1500”), a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a solution spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber F: Fiber using polypropylene (Sumitomo Chemical Co., Ltd., trade name “SUMITOMONOBLEN S131”), a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a melt-spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber G: Fiber using a vinyl chloride-acrylonitrile copolymer (copolymerization ratio: 50:50, weight average molecular weight: 80000 to 130000), a fiber spun from a nozzle having an outlet cross-section with a cross-sectional secondary moment of the weak axis of 10×10−4 mm4 (a fiber produced by a solution spinning method), average fineness: 40 to 70 decitex (average value of fineness of 100 fibers)
Base fiber H: Human hair, used after washing trade name “VELVET REMI” of Sun Taiyang Co., Ltd. with water set at 40° C.
The fiber treating agent was prepared by mixing surfactants shown in Tables 1 to 5 and water. The content of the surfactant (the total amount of the cationic surfactant and the nonionic surfactant) and the content of water in the fiber treating agent are the contents based on the total amount of the fiber treating agent. The ratio of the cationic surfactant with respect to the nonionic surfactant (the content of the cationic surfactant/the content of the nonionic surfactant) in the fiber treating agent is as shown in each table. In each of Examples and Comparative Examples, a surfactant marked with a notation “O” in the table was used. As the surfactant, the following reagents were used. In Example 7, polyoxyethylene lauryl ether (the number of carbon atoms of carbon chain: 12, HLB 17.4) and polyoxyethylene stearyl ether (the number of carbon atoms of carbon chain: 18, HLB 16.6) were used.
Dispersibility was evaluated for the fiber treating agent having the same composition as that of the fiber treating agent used in Examples and Comparative Examples. First, the nonionic surfactant was added to water set at 50° C. and then stirred for about 3 hours under the conditions of 50° C. and 300 rpm. Thereafter, the cationic surfactant was added thereto and then stirred for about 6 hours under the conditions of 50° C. and 300 rpm, and the state of the fiber treating agent was visually observed. A case where the fiber treating agent was not separated into two phases and the component, which was solid before being added to water, was dispersed overall in a colloidal shape was evaluated as “A”, and a case where the component, which was solid before being added to water, was not dispersed overall in a colloidal shape (including a case where the fiber treating agent was separated into two phases) was evaluated as “B”. Results are shown in each table. As for Comparative Example 1 not using the cationic surfactant, since there was no problem in dispersibility, the result was evaluated as “A”. As for Comparative Example 4, when the dispersibility of the cationic surfactant was checked without using the nonionic surfactant, the result was evaluated as “B”.
The above-mentioned base fiber was stretched at 100° C., and then the above-mentioned fiber treating agent was applied to the base fiber by a roll transfer method. As roll transfer conditions, the radius of the roll was 125 mm, the roll was immersed in the fiber treating agent with a height of 20 mm from the lower end of the roll, and the roll rotation speed was 0.2 to 8 m/min. Thereafter, annealing was performed at 110° C., and a fiber for evaluation having a single fiber fineness of 20 to 100 decitex was obtained. The stretch ratio was 3.25 times, and the relaxation ratio during annealing was 25%. The relaxation ratio during annealing is a value calculated by the formula: “(Circumference of the outlet nearest portion of the roller of the annealing furnace)/(Circumference of the inlet nearest portion of the roller of the annealing furnace)”.
As the content of the active ingredient in the fiber for evaluation, the attached amount (unit: % by mass) of the surfactant on the surface of the fiber for evaluation is shown in each table. The attached amount was calculated by the following formula based on the solid content extracted from the fiber for evaluation by a hot water extraction method.
Attached amount [% by mass]=(Mass [g] of extracted solid content/Mass [g] of fiber for evaluation before extraction)×100
In the above-mentioned hot water extraction method, 20 g of the fiber for evaluation was first weighed into a 300 mL beaker, and then 200 mL of pure water was added thereto. Subsequently, after the beaker was placed in a thermostat bath at 80° C., stirring was performed with a glass rod every 1 hour and the extraction operation was performed for 4 hours in total, thereby obtaining an evaluation sample. Then, the evaluation sample was filtered with No. 5A filter paper, and then the beaker, the evaluation sample, and the filter paper were washed with a total of 100 mL of water in two portions. The moisture in the obtained filtrate was dried and solidified at 80° C. The mass of the dry solid after completely removing moisture was obtained as the mass of the extracted solid content.
The base fiber was not stretched, and the above-mentioned fiber treating agent was applied to the base fiber by a roll transfer method according to the same method as the above-mentioned procedure. Thereafter, drying was performed in an oven at 40° C. to obtain a fiber for evaluation.
A wave shape was formed with respect to the above-mentioned fiber for evaluation, and then combability, softness, stickiness resistance, and weaving efficiency were evaluated. As shaping process, yaki processing was performed by using a gear machine (NEW YAKI BRAID CRIMPING M/C-2.5 mm/SUNG JIN INDUSTRIAL CO., LTD.) under the conditions of gear pitch: 2.5 mm, preheating at 90° C., gear roll temperature: 90° C., and gear roll rotation speed: 1 m/m. Results are shown in each table.
The above-mentioned fibers for evaluation (after the shaping process) were bundled to obtain a fiber bundle having a length of 300 mm and a mass of 10 g. Then, a maximum resistive force [unit: gf] when the fiber bundle was combed from a position of 90 mm from the tip end of the fiber bundle to the tip end of the fiber bundle at a movement speed of 10 mm/sec and a movement distance of 100 mm was measured with a static or dynamic friction measuring machine (manufactured by TRINITY-LAB Inc., trade name “TL201Tt”). It was determined that the combability is favorable as the resistive force is smaller.
The above-mentioned fibers for evaluation (after the shaping process) were bundled to obtain a fiber bundle having a length of 600 mm and a mass of 120 g. Determination on two ranks of “soft” and “hard” was performed by touching (softness felt when touching the fiber bundle as if compressing with the palm) of ten technicians for treatment of the fiber for hair (work experience: 5 years or longer), and then the softness (before water rinsing) was determined based on the following criteria. Furthermore, the fiber bundle was rinsed by repeating an operation of immersing the fiber bundle in water and then squeezing the fiber bundle three times, and then the softness (after water rinsing) was determined according to the same procedure.
The above-mentioned fibers for evaluation (after the shaping process) were bundled to obtain a fiber bundle having a length of 600 mm and a mass of 120 g. Determination on two ranks of “not sticky” and “sticky” was performed by touching (the degree of stickiness felt when touching the fiber bundle as if compressing with the palm) of ten technicians for treatment of the fiber for hair (work experience: 5 years or longer), and then the stickiness resistance was determined based on the following criteria.
A: The fiber bundle was evaluated not to be sticky by 9 or more people.
B: The fiber bundle was evaluated not to be sticky by 5 to 8 people.
C: The fiber bundle was evaluated not to be sticky by 1 to 4 people.
D: The fiber bundle was evaluated not to be sticky by 0 people.
As the above-mentioned fiber for evaluation (after the shaping process), a fiber bundle (length: 500 mm, mass; 5 g) narrowed to the tip end was obtained by using 35% of fibers having a length of 100 mm or more and less than 300 mm, 9% of fibers having a length of 300 mm or more and less than 350 mm, 28% of fibers having a length of 350 mm or more and less than 425 mm, and 28% of fibers having a length of 425 mm or more and 500 mm or less. Then, the fiber bundle was braided into three strands, and then whether or not the tip end of the fiber bundle unraveled when the hand was released was determined.
A: The tip end did not unravel even when the hand weaving the fiber bundle was released.
B: The tip end unraveled when the hand weaving the fiber bundle was released.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-214544 | Dec 2021 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2022/045352 | 12/8/2022 | WO |
