Synthetic fiber treatment agent and synthetic fiber

Abstract

The present invention addresses the problem of improving the permeability of an adhesive between synthetic fibers and the high-temperature burr suppression effect. The synthetic fiber treatment agent contains a smoothing agent (A) containing the following complete ester compound (A1) and a dicarboxylic acid compound (B). The complete ester compound (A1) is a complete ester compound of a trivalent to quaternary polyhydric alcohol and a monocarboxylic acid. The dicarboxylic acid compound (B) is at least one selected from the group consisting of dicarboxylic acids having 0-1 hydroxyl groups in the molecule and having 3-10 carbon atoms, and salts thereof.

Description

Technical Field

[0001] The present invention relates to a synthetic fiber treating agent and synthetic fiber capable of improving the permeability of an adhesive between fibers and the high-temperature burr suppression effect of the synthetic fiber. Background Art

[0002] In the spinning and drawing process of synthetic fibers, for example, a treatment is sometimes performed to allow a treatment agent to adhere to the surface of the synthetic fibers in order to improve smoothness, antistatic properties, and the like. In addition, synthetic fibers are widely used as industrial materials. For example, they are used in automotive fields such as tire cords, air bags, construction fields such as carpets, tents, commercial fields such as advertising cloths, agriculture / aquaculture fields such as ropes and fishing nets, civil engineering fields such as conveyor belts and lifelines. Among these, they are widely used as reinforcing materials for rubber products. When used as reinforcing materials for rubber products, adhesives are applied to synthetic fibers and bonded to rubber materials.

[0003] For example, after a treatment agent is attached to synthetic fibers during yarn making, the twisted yarn of synthetic fibers is woven to produce fabric. An adhesive is applied to the fabric to bond the fabric to a rubber material. Alternatively, a treatment agent and an adhesive are mixed in advance to produce a mixed solution. After a mixed solution is attached to synthetic fibers during yarn making, the twisted yarn of synthetic fibers is woven to produce fabric. The fabric is bonded to a rubber material. Alternatively, after a treatment agent and an adhesive are attached to synthetic fibers respectively during yarn making, the twisted yarn of synthetic fibers is woven to produce fabric. The fabric is bonded to a rubber material. Alternatively, bonding to the rubber material is performed not only on the fabric but also on the raw yarn and the twisted yarn.

[0004] In the past, there are known synthetic fiber treatment agents disclosed in Patent Documents 1 to 3. Patent Document 1 discloses a spinning oil for false twist processing containing polyether. Patent Document 2 discloses a friction false twist oil for synthetic fibers containing polyether, carboxylate, alkyl phosphate and aliphatic dibasic acid. Patent Document 3 discloses a polyamide fiber treatment agent containing an ester component, amide and polyoxyalkylene-modified silicone. Prior art literature Patent Literature

[0005] Patent Document 1: Japanese Patent Publication No. 5-65625 Patent Document 2: Japanese Patent No. 4463327 Patent Document 3: Japanese Patent No. 3165284 Summary of the invention Problems to be solved by the invention

[0006] However, in the above-mentioned existing synthetic fiber treatment agents, there is no consideration of the adhesion of the adhesive to the synthetic fiber when the synthetic fiber is used as a reinforcing material for rubber products. In order to improve the adhesion of the adhesive to the synthetic fiber, it can be mentioned to improve the permeability of the adhesive between the fibers. The improvement of the adhesion allows the adhesive to be evenly applied to the fibers, suppressing uneven bonding. In addition, it is also possible to suppress the loss caused by the scattering of the adhesive during the attachment process and to suppress the excessive application of the adhesive to ensure adhesion. In addition, in the spinning and stretching process of the synthetic fiber, if the synthetic fiber is exposed to high temperature, burrs may be easily generated. It is required to further improve the permeability of the adhesive between the fibers of the synthetic fiber and the high-temperature burr suppression effect. Means for solving problems

[0007] The present inventors have conducted studies to solve the above-mentioned problems and have found that a structure containing a predetermined compound is suitable in a synthetic fiber treating agent. Various methods for solving the above-mentioned problems are described.

[0008] The synthetic fiber treatment agent of embodiment 1 contains a smoothing agent (A) containing the following complete ester compound (A1) and the following dicarboxylic acid compound (B), and further contains a nonionic surfactant (C) and an ionic surfactant (D). The above-mentioned ionic surfactant (D) contains at least one selected from a sulfonic acid compound (D1) and a phosphate compound (D2). In the synthetic fiber treatment agent, the content ratio of the above-mentioned sulfonic acid compound (D1) is 5% by mass or less, and the content ratio of the above-mentioned phosphate compound (D2) is 5% by mass or less. The complete ester compound (A1) is a complete ester compound of a polyol having a valence of more than three and less than four and a monocarboxylic acid. The dicarboxylic acid compound (B) is at least one selected from dicarboxylic acids having a carbon number of more than 3 and less than 10 and having 0 or more and 1 or less hydroxyl groups in the molecule and their salts.

[0009] Regarding Embodiment 2, in the synthetic fiber processing agent according to Embodiment 1, the dicarboxylic acid compound (B) has 4 or more and 6 or less carbon atoms. Regarding embodiment 3, in the synthetic fiber processing agent according to embodiment 1 or 2, the dicarboxylic acid constituting the dicarboxylic acid compound (B) is contained in a ratio of 0.01 mass % to 1 mass % based on the total mass of the synthetic fiber processing agent.

[0010] Regarding embodiment 4, in the synthetic fiber processing agent described in any one of embodiments 1 to 3, the complete ester compound (A1) is contained in a ratio of 25 mass % to 70 mass % based on the total mass of the synthetic fiber processing agent.

[0011] The synthetic fiber of the fifth aspect is characterized in that the synthetic fiber treatment agent described in any one of the first to fourth aspects is adhered thereto. Effects of the Invention

[0012] According to the present invention, the permeability of the adhesive between the fibers of the synthetic fiber and the high-temperature burr suppression effect can be improved. DETAILED DESCRIPTION

[0013] <First Embodiment> A first embodiment of the synthetic fiber treating agent (hereinafter also referred to as a treating agent) of the present invention will be described below.

[0014] The treatment agent of the present embodiment contains a smoothing agent (A) containing the following complete ester compound (A1) and the following dicarboxylic acid compound (B). The complete ester compound (A1) is a complete ester compound of a trivalent or higher and tetravalent or lower polyol and a monovalent carboxylic acid.

[0015] The dicarboxylic acid compound (B) is at least one selected from dicarboxylic acids having 3 to 10 carbon atoms and having 0 to 1 hydroxyl group in the molecule, and salts thereof. By containing the smoothing agent (A) and the dicarboxylic acid compound (B) in the treatment agent, the permeability of the adhesive between the synthetic fibers and the high-temperature burr suppression effect can be improved.

[0016] (Smoothing agent (A)) The smoothing agent (A) contains the above-mentioned complete ester compound (A1). Specific examples of the trivalent or higher and tetravalent or lower polyols as the raw material of the complete ester compound (A1) include glycerin, pentaerythritol, trimethylolpropane, 2-methyl-2-hydroxymethyl-1,3-propanediol, 1,2,3-butanetriol, 1,2,4-butanetriol, erythritol, 1,2,3-pentanetriol, and 1,2,4-pentanetriol.

[0017] The monocarboxylic acid as a raw material of the complete ester compound (A1) may be a known one as appropriate, and may be a saturated carboxylic acid or an unsaturated carboxylic acid, and may be a linear monocarboxylic acid or a monocarboxylic acid having a branched structure.

[0018] Specific examples of carboxylic acids include: (1) straight-chain alkyl fatty acids such as octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, docosanoic acid, and tetracosanoic acid; (2) branched-chain alkyl fatty acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; (3) straight-chain alkenyl fatty acids such as crotonic acid, myristic acid, palmitoleic acid, oleic acid, vaccenic acid, eicosenoic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid; (4) fatty acids of natural origin such as castor oil fatty acid, sesame oil fatty acid, tall oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid, palm oil fatty acid, palm kernel fatty acid, and coconut oil fatty acid.

[0019] Specific examples of the complete ester compound (A1) include triesters of trimethylolpropane and palm kernel fatty acid, vegetable oils such as rapeseed oil, and pentaerythritol tetraoctanoate.

[0020] Among these complete ester compounds (A1), one complete ester compound (A1) may be used alone, or two or more complete ester compounds (A1) may be used in appropriate combination.

[0021] The smoothing agent (A) may contain a smoothing agent (A2) used in the field of treatment agents in addition to the above-mentioned complete ester compound (A1). Examples of the smoothing agent (A2) include mineral oil (kinematic viscosity of 5 mm at 40°C). 2 / s or more mineral oil), polyolefins, ester compounds other than the complete ester compound (A1), etc.

[0022] Examples of the mineral oil include aromatic hydrocarbons, paraffinic hydrocarbons, cycloparaffinic hydrocarbons, etc. More specifically, examples include spindle oil and liquid paraffin.

[0023] As the polyolefin, poly-α-olefin used as a smoothing component can be applied. Specific examples of the polyolefin include poly-α-olefins obtained by polymerizing 1-butene, 1-hexene, 1-decene, etc. Commercially available products can be appropriately used as the poly-α-olefin.

[0024] Specific examples of the smoothing agent (A2) include diisocetyl adipate, oleyl oleate, and dioleyl thiodipropionate. Among the above-mentioned smoothing agents (A), one type of smoothing agent (A) may be used alone, or two or more types of smoothing agents (A) may be used in appropriate combination.

[0025] In the treatment agent, the lower limit of the content ratio of the complete ester compound (A1) relative to the total mass of the treatment agent is preferably 25 mass % or more, more preferably 30 mass % or more. The upper limit of the content ratio of the complete ester compound (A1) relative to the total mass of the treatment agent is preferably 80 mass % or less, more preferably 70 mass % or less. It should be noted that the range formed by arbitrarily combining the above upper and lower limits can also be assumed. If the content ratio of the complete ester compound (A1) is within the above numerical range, the high-temperature burr suppression effect can be further improved.

[0026] (Dicarboxylic acid compound (B)) The dicarboxylic acid compound (B) is at least one selected from dicarboxylic acids having 3 to 10 carbon atoms and having 0 to 1 hydroxyl group in the molecule, and salts thereof.

[0027] As the dicarboxylic acid having 3 or more and 10 or less carbon atoms and having 0 or more and 1 or less hydroxyl groups in the molecule, a known substance can be appropriately adopted, and it can be a saturated carboxylic acid or an unsaturated carboxylic acid. It can be an aliphatic carboxylic acid or an aromatic carboxylic acid. As the dicarboxylic acid having 3 or more and 10 or less carbon atoms, for example, aliphatic carboxylic acids such as malonic acid, succinic acid, oxosuccinic acid (malic acid), glutaric acid, adipic acid, fumaric acid, and maleic acid, aromatic carboxylic acids such as terephthalic acid and isophthalic acid, etc. can be cited.

[0028] Examples of the salt of the dicarboxylic acid include alkali metal salts, amine salts, and phosphonium salts. Examples of the alkali metal that forms the alkali metal salt include sodium and potassium.

[0029] Examples of the amines that form the above-mentioned amine salts include (1) aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, butylamine, dibutylamine, tributylamine, and octylamine; (2) aromatic amines or heterocyclic amines such as aniline, pyridine, morpholine, piperazine, and their derivatives; (3) alkanolamines such as monoethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, butyldiethanolamine, octyldiethanolamine, (poly)oxyalkylene alkylamine salts, and lauryldiethanolamine; (4) ammonia; and the like.

[0030] Examples of the phosphonium group forming the phosphonium salt include: (1) phosphonium groups in which all organic groups bonded to the phosphorus atom are aliphatic hydrocarbon groups, such as tetramethylphosphonium, tetraethylphosphonium, tetrabutylphosphonium, trimethylethylphosphonium, trimethylpropylphosphonium, trimethyloctylphosphonium, trimethyldodecylphosphonium, trimethyloctadecylphosphonium, etc.; (2) phosphonium groups in which at least one of the organic groups bonded to the phosphorus atom is an aromatic hydrocarbon group, such as trimethylphenylphosphonium, triethylphenylphosphonium, tributylphenylphosphonium, dimethyldiphenylphosphonium, triphenylethylphosphonium, tetraphenylphosphonium, etc. When water is generated during neutralization, it may be mixed with the treatment agent, or it may be mixed with the treatment agent after removing the water. In addition, a neutralized product of a dicarboxylic acid prepared in advance may be mixed with the treatment agent, or it may be neutralized in the treatment agent. When the dicarboxylic acid compound is mixed with the treating agent, the dicarboxylic acid compound may be mixed with the treating agent after being mixed with the compatibilizer.

[0031] Specific examples of the dicarboxylic acid compound (B) include a substance obtained by neutralizing adipic acid with 4 mol of ethylene oxide added to 1 mol of laurylamine in a 1:1 mol ratio (hereinafter also referred to as adipic acid laurylamine EO4 salt), fumaric acid, malic acid, dipotassium malonic acid (a substance obtained by neutralizing malonic acid with potassium hydroxide in a 1:2 mol ratio and dehydrating it), and dipotassium sebacic acid (a substance obtained by neutralizing sebacic acid with potassium hydroxide in a 1:2 mol ratio and dehydrating it).

[0032] Among these dicarboxylic acid compounds (B), one kind of dicarboxylic acid compound (B) may be used alone, or two or more kinds of dicarboxylic acid compounds (B) may be used in appropriate combination.

[0033] The number of carbon atoms of the dicarboxylic acid compound (B) is preferably 4 to 6. When the number of carbon atoms of the dicarboxylic acid compound (B) is 4 to 6, the high-temperature burr suppression effect can be further enhanced.

[0034] The lower limit of the content ratio of the dicarboxylic acid constituting the dicarboxylic acid compound (B) is preferably 0.01% by mass or more, more preferably 0.1% by mass or more, relative to the total mass of the treatment agent. The upper limit of the content ratio of the dicarboxylic acid is preferably 1% by mass or less, more preferably 0.6% by mass or less, relative to the total mass of the treatment agent. It should be noted that the range formed by arbitrarily combining the above upper and lower limits can also be assumed.

[0035] Here, the above-mentioned "content ratio of dicarboxylic acid constituting dicarboxylic acid compound (B)" refers to the amount of dicarboxylic acid when the counter ion in the dicarboxylic acid compound (B) is hydrogen. That is, when the dicarboxylic acid compound (B) is a potassium salt of dicarboxylic acid, it refers to the content ratio of dicarboxylic acid in which potassium is replaced by hydrogen.

[0036] By making the content ratio of dicarboxylic acid within the above numerical range, the effect of the present invention can be more effectively demonstrated. The content ratio of dicarboxylic acid can be calculated based on the mixing amount of each raw material when preparing the treatment agent. In addition, it can also be measured by liquid chromatography-mass spectrometry described later.

[0037] (Nonionic surfactant (C)) The treatment agent may further contain a nonionic surfactant (C). By including a nonionic surfactant (C) in the treatment agent, the stability of the appearance of the treatment agent can be improved, and a solvent with different polarities such as water and / or an organic solvent can be used as a diluent when applying to synthetic fibers.

[0038] Examples of the nonionic surfactant (C) include compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to alcohols or carboxylic acids, ether / ester compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to ester compounds of carboxylic acids and polyols, compounds obtained by adding alkylene oxide to natural oils and fats or by esterifying the compounds with carboxylic acids, compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to amine compounds such as organic primary amines, compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to fatty amides, amide compounds obtained by condensing amine compounds with carboxylic acids, partial ester compounds of carboxylic acids and polyols, and the like.

[0039] Specific examples of alcohols used as a raw material for the nonionic surfactant (C) include: (1) straight-chain alkyl alcohols such as methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, and triacontanol; (2) isopropyl alcohol, isobutyl alcohol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isotriacontanol, and the like; (1) branched-chain alkyl alcohols such as isohexadecanol, isoheptadecanol, isooctadecanol, isonadecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexadecanol, isohexadecanol, isohexadecanol, isoctacosanol, isononadecanol and isopentadecanol; (2) straight-chain alkenyl alcohols such as tetradecanol, hexadecanol, heptadecanol, octadecenol and nonadecanol; (3) branched-chain alkenyl alcohols such as isohexadecanol and isohexadecanol; (4) branched-chain alkenyl alcohols such as isohexadecanol and isooctadecanol; (5) cyclic alkyl alcohols such as cyclopentanol and cyclohexanol; (6) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol and tristyrenated phenol.

[0040] Specific examples of carboxylic acids used as raw materials for the nonionic surfactant (C) include: (1) straight-chain alkyl carboxylic acids such as octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, and docosanoic acid; (2) branched-chain alkyl carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; (3) straight-chain alkenyl carboxylic acids such as octadecenoic acid, octadecadienoic acid, and octadecatrienoic acid; (4) aromatic carboxylic acids such as benzoic acid; (5) hydroxycarboxylic acids such as ricinoleic acid; and the like.

[0041] Regarding the alkylene oxide used as the raw material for forming the (poly)oxyalkylene structure of the nonionic surfactant (C), the alkylene oxide having a carbon number of 2 or more and 4 or less is preferred. As specific examples of alkylene oxides, for example, ethylene oxide, propylene oxide, butylene oxide, etc. can be cited. The number of moles of alkylene oxide added can be appropriately set, preferably 0.1 mole or more and 250 moles or less, more preferably 1 mole or more and 200 moles or less, and further preferably 2 moles or more and 150 moles or less. It is also possible to assume a range formed by any combination of the above upper and lower limits. It should be noted that the number of moles of alkylene oxide added represents the number of moles of alkylene oxide relative to 1 mole of the addition object compound in the loaded raw material. Alkylene oxide can use one alkylene oxide alone, or two or more alkylene oxides can be used in appropriate combination. In the case of applying two or more alkylene oxides, their addition form can be any one of block addition, random addition, and a combination of block addition and random addition, without special restrictions.

[0042] Specific examples of the polyol used as a raw material for the nonionic surfactant (C) include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerol, diglycerol, 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, and the like.

[0043] Specific examples of the aliphatic amine or organic primary amine used as a raw material of the nonionic surfactant (C) include methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine (stearylamine), octadecenylamine, coconut amine and the like.

[0044] Specific examples of the fatty amide used as a raw material of the nonionic surfactant (C) include caprylic acid amide, lauryl amide, palmitamide, stearic acid amide, oleic acid amide, behenic acid amide, and wood wax amide.

[0045] Specific examples of the nonionic surfactant (C) include, for example, a compound obtained by adding 8 mol of ethylene oxide (hereinafter referred to as EO) to 1 mol of oleyl alcohol, a compound obtained by adding 12 mol of EO to 1 mol of isotridecanol, a compound obtained by adding 10 mol of EO to 1 mol of hydrogenated castor oil, a compound obtained by esterifying 25 mol of EO to 1 mol of hydrogenated castor oil with 2 mol of oleic acid, a compound obtained by crosslinking 20 mol of EO to 1 mol of hydrogenated castor oil with adipic acid and terminally esterifying the mixture with stearic acid (mass average molecular weight 5000), a compound obtained by adding 8 mol of EO to 1 mol of sorbitan monolaurate or sorbitan monooleate, a diester of polyethylene glycol (mass average molecular weight 400) and oleic acid, a compound obtained by adding 8 mol of EO to 1 mol of laurylamine, a compound obtained by adding 3 mol of EO to 1 mol of oleic acid diethanolamide, and the like.

[0046] Among these nonionic surfactants (C), one type of nonionic surfactant (C) may be used alone, or two or more types of nonionic surfactants (C) may be used in appropriate combination.

[0047] The lower limit of the content ratio of the nonionic surfactant (C) in the treatment agent is preferably 20 mass % or more, more preferably 30 mass % or more. In addition, the upper limit of the content ratio of the nonionic surfactant (C) is preferably 90 mass % or less, more preferably 80 mass % or less. It should be noted that the range formed by any combination of the above upper and lower limits can also be assumed.

[0048] By setting the content of the nonionic surfactant (C) to the above numerical range, the stability of the appearance of the treatment agent can be further improved. In addition, as a diluent when applying to synthetic fibers, it is easier to use solvents with different polarities such as water and organic solvents.

[0049] (Ionic surfactant (D)) The treatment agent may further contain an ionic surfactant (D). By including the ionic surfactant (D) in the treatment agent, static electricity generated when the synthetic fiber to which the treatment agent is attached passes through a stretching roller or a yarn guide in the spinning and stretching process of the synthetic fiber can be suppressed.

[0050] Examples of the ionic surfactant (D) include anionic surfactants, cationic surfactants, and amphoteric surfactants. As the anionic surfactant, a known one can be appropriately adopted. Specific examples of anionic surfactants include: (1) phosphates of aliphatic alcohols such as lauryl phosphate, cetyl phosphate, octyl phosphate, oleyl phosphate, and stearyl phosphate; (2) phosphates of aliphatic alcohols to which at least one alkylene oxide selected from ethylene oxide and propylene oxide is added such as polyoxyethylene lauryl ether phosphate, polyoxyethylene oleyl ether phosphate, and polyoxyethylene stearyl ether phosphate; (3) aliphatic sulfonates or aromatic sulfonates such as lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecyl sulfonate, dodecylbenzene sulfonate, secondary alkyl sulfonic acid (with 13 to 15 carbon atoms), secondary alkyl sulfonic acid (with 11 to 14 carbon atoms), and α-olefin sulfonate; (4) lauryl sulfate, oleyl sulfate, stearyl sulfate (5) Sulfate salts of substances obtained by adding at least one alkylene oxide selected from ethylene oxide and propylene oxide to aliphatic alcohols, such as polyoxyethylene lauryl ether sulfate salts, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate salts, polyoxyethylene oleyl ether sulfate salts, etc.; (6) Sulfate salts of fatty acids, such as castor oil fatty acid sulfate salts, sesame oil fatty acid sulfate salts, tall oil fatty acid sulfate salts, soybean oil fatty acid sulfate salts, rapeseed oil fatty acid sulfate salts, palm oil fatty acid sulfate salts; (7) Sulfate salts of fats and oils, such as castor oil sulfate salts, sesame oil sulfate salts, tall oil sulfate salts, soybean oil sulfate salts, rapeseed oil sulfate salts, palm oil sulfate salts; (8) Fatty acid salts, such as laurate, oleate, stearate, etc.; (9) Sulfonated succinate salts of fatty alcohols, such as dioctyl sulfosuccinate, etc. Examples of the counter ion of the anionic surfactant include alkali metal salts such as potassium salts and sodium salts, ammonium salts, triethanolamine salts, (poly)oxyalkylenealkylamine salts, and alkanolamine salts such as dibutylethanolamine salts.

[0051] As the anionic surfactant, from the perspective of further improving the high-temperature burr suppression effect, it is preferred to include at least one selected from the sulfonate salts of (3) above and the phosphate ester salts of (1) or (2) above. It should be noted that the sulfonate salts and the phosphate ester salts are also referred to as sulfonic acid compounds (D1) and phosphate ester compounds (D2), respectively.

[0052] The ionic surfactant (D) can further enhance the high-temperature burr suppression effect by containing at least one selected from the sulfonic acid compound (D1) and the phosphoric acid ester compound (D2).

[0053] Specific examples of the sulfonic acid compound (D1) include secondary alkanesulfonic acid sodium salt (alkane having 11 to 14 carbon atoms), di(2-ethylhexyl)sulfosuccinic acid sodium salt, α-olefinsulfonic acid sodium salt, and the like.

[0054] Specific examples of the phosphoric acid ester compound (D2) include phosphoric acid ester-triethanolamine salt of oleyl alcohol EO6 molar adduct and isocetyl phosphate-dibutylethanolamine salt.

[0055] The anionic surfactant may contain an anionic surfactant (D3) other than the sulfonic acid compound (D1) and the phosphoric acid ester compound (D2). Specific examples of the anionic surfactant (D3) include sodium lauryl sulfate.

[0056] Among these anionic surfactants, one kind may be used alone, or two or more kinds of anionic surfactants may be used in appropriate combination. Specific examples of the cationic surfactant include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, didecyldimethylammonium chloride, and the like.

[0057] Specific examples of the amphoteric surfactant include betaine-type amphoteric surfactants and the like. Among these ionic surfactants (D), one ionic surfactant (D) may be used alone, or two or more ionic surfactants (D) may be used in appropriate combination.

[0058] In the treatment agent, the lower limit of the content ratio of the ionic surfactant (D) is preferably 1% by mass or more, more preferably 3% by mass or more. In addition, the upper limit of the content ratio of the ionic surfactant (D) is preferably 10% by mass or less, more preferably 6% by mass or less. It should be noted that the range formed by arbitrarily combining the above upper and lower limits can also be assumed.

[0059] In the treatment agent, the lower limit of the content ratio of the sulfonic acid compound (D1) is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. In addition, the upper limit of the content ratio of the sulfonic acid compound (D1) is preferably 5% by mass or less, and more preferably 3% by mass or less. It should be noted that the range formed by arbitrarily combining the above upper and lower limits can also be assumed.

[0060] In the treatment agent, the lower limit of the content ratio of the phosphate compound (D2) is preferably 1% by mass or more, more preferably 1.5% by mass or more. In addition, the upper limit of the content ratio of the phosphate compound (D2) is preferably 5% by mass or less, more preferably 3% by mass or less. It should be noted that the range formed by any combination of the above upper and lower limits can also be assumed.

[0061] By setting the content of the sulfonic acid compound (D1), the phosphate compound (D2) or the ionic surfactant (D) within the above numerical range, static electricity generated when the synthetic fiber to which the treatment agent is attached passes through a stretching roller or a yarn guide can be more appropriately suppressed.

[0062] (Other ingredients (E)) The treatment agent may further contain other components (E). There are no particular restrictions on other components, and examples thereof include ethylene glycol, diethylene glycol, polyethylene glycol, polypropylene glycol, glycerol, polyether-modified silicone, dimethylpolysiloxane, 6-(4-hydroxy-3,5-di-tert-butylanilino)-2,4-bis(octylthio)-1,3,5-triazine, etc. In addition, from the perspective of improving the stability of the appearance during storage, the treatment agent may be pre-mixed with water, in which case the mixing ratio of the treatment agent to water is preferably (mass of the treatment agent / mass of water) = 85 / 15 to 99.9 / 0.1.

[0063] <Second Embodiment> Next, a second embodiment that concretizes the synthetic fiber based on the present invention is described. The synthetic fiber of this embodiment is attached with the treatment agent of the first embodiment. When the treatment agent is attached to the synthetic fiber, the form of the treatment agent can be a diluent diluted with a diluent solvent, such as an organic solvent solution, an aqueous liquid, etc. Among the diluent solvents, hydrocarbons with a carbon number of 10 or more and 15 or less and water are preferably used from the aspects of the adhesion of the treatment agent to the fiber and the economy. The diluent such as the aqueous liquid is attached to the synthetic fiber, for example, in the spinning or stretching process. For the diluent attached to the synthetic fiber, the diluent solvent can be evaporated by the stretching process and the drying process. There is no particular limitation on the process of attaching the diluent as long as it is a spinning process. In the stretching or heat treatment process, by using it in a manufacturing equipment or process having a process of passing through a roller above 200°C, the effect of the invention can be expected to be more.

[0064] Specific examples of synthetic fibers to which the treatment agent of the present embodiment is applied are not particularly limited, and examples thereof include: (1) polyester fibers such as polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester resins; (2) polyamide fibers such as nylon 6 and nylon 66; (3) polyacrylic acid fibers such as polyacrylic acid and modified acrylic acid; (4) polyolefin fibers such as polyethylene and polypropylene; and the like. Among these, polyester fibers and polyamide fibers are preferably used.

[0065] There is no particular restriction on the proportion of the treatment agent attached to the synthetic fiber, but it is preferred that the treatment agent be attached in a manner that the proportion is 0.1% by mass or more and 3% by mass or less (excluding the proportion of solvents such as water) relative to the synthetic fiber. This configuration can further enhance the effect of the present invention. In addition, there is no particular restriction on the method for attaching the treatment agent, and for example, a known method such as a roller oiling method, a guide oiling method using a metering pump, an immersion oiling method, and a spray oiling method can be used.

[0066] In the present invention, the use of the synthetic fiber is not particularly limited, but synthetic fibers used in industrial materials are preferred. For example, synthetic fibers used in the fields of automobiles, construction, commerce, agriculture, aquaculture, civil engineering, etc., such as fibers for air bags, fibers for seat belts, fibers for tire cords, fibers for carpets, fibers for tents, fibers for advertising cloths, fibers for fishing nets, fibers for conveyor belts, and fibers for ropes are more preferred.

[0067] Among the above-mentioned industrial materials, when used as a reinforcing material for rubber products, there is no particular limitation on the adhesive used for bonding with the rubber material. Known adhesives used for bonding with rubber materials can be used. As known adhesives used for bonding with rubber materials, for example, epoxy compounds, isocyanate compounds, resorcinol formaldehyde latex (RFL) solutions, etc. can be cited. Among these, epoxy compounds are preferred. In addition, mixtures of these adhesives, mixtures of adhesives and surfactants, etc. can also be cited. In addition, when applying the adhesive, a solution diluted with water or an organic solvent can be applied, or it can be attached in its original state.

[0068] The process of attaching the treating agent and the adhesive of the present invention to the synthetic fiber is not particularly limited. For example, during yarn making, a treatment agent is attached to synthetic fibers, and then the twisted yarn of synthetic fibers is woven to produce fabric. An adhesive may be applied to the fabric, and the fabric may be bonded to a rubber material. Alternatively, a treatment agent and an adhesive may be pre-mixed to produce a mixed solution. During yarn making, the mixed solution is attached to synthetic fibers, and then the twisted yarn of synthetic fibers is woven to produce fabric. The fabric may be bonded to a rubber material. Alternatively, during yarn making, a treatment agent and an adhesive may be attached to synthetic fibers, respectively, and then the twisted yarn of synthetic fibers is woven to produce fabric. The fabric may be bonded to a rubber material. In addition, bonding to the rubber material is performed not only on the fabric, but also on the raw yarn and the twisted yarn. When the adhesive is applied to the raw yarn, it may be before or after stretching. After yarn making, the adhesive may be applied and the yarn may be rewound again.

[0069] <Effect> The effects of the treatment agent and the synthetic fiber according to the above-described embodiment will be described. (1) The treatment agent of the above embodiment contains a smoothing agent (A) containing the following complete ester compound (A1) and the following dicarboxylic acid compound (B).

[0070] The complete ester compound (A1) is a complete ester compound of a trivalent or higher and tetravalent or lower polyol and a monovalent carboxylic acid. The dicarboxylic acid compound (B) is at least one selected from dicarboxylic acids having 3 to 10 carbon atoms and having 0 to 1 hydroxyl groups in the molecule and salts thereof.

[0071] Therefore, the permeability of the adhesive between the synthetic fibers and the high-temperature burr suppression effect can be improved. (2) The carbon number of the dicarboxylic acid compound (B) is 4 to 6. Therefore, the high-temperature burr suppression effect can be further enhanced.

[0072] (3) The treatment agent contains the dicarboxylic acid constituting the dicarboxylic acid compound (B) in a ratio of 0.01 mass % to 1 mass % based on the total mass of the treatment agent. Therefore, the effects of the present invention can be more effectively exhibited.

[0073] (4) The treatment agent contains the complete ester compound (A1) in a ratio of 25 mass % or more and 70 mass % or less relative to the total mass of the treatment agent. Therefore, the high-temperature burr suppression effect can be further enhanced.

[0074] (5) The treatment agent contains a nonionic surfactant (C) and an ionic surfactant (D). Therefore, the stability of the appearance of the treatment agent can be improved, and a solvent with different polarities such as water and / or an organic solvent can be used as a diluent when applying the treatment agent to the synthetic fiber. In addition, static electricity generated when the synthetic fiber with the treatment agent attached passes through a stretching roller or a yarn guide can be suppressed.

[0075] (6) By making the ionic surfactant (D) contain at least one selected from the sulfonic acid compound (D1) and the phosphoric acid ester compound (D2), the high-temperature burr suppression effect can be further improved.

[0076] <Change example> It should be noted that the above-mentioned embodiment may also be modified as follows. The above-mentioned embodiment and the following modified examples may be implemented in combination with each other within the scope of no technical contradiction.

[0077] The treatment agent of the above embodiment may be further mixed with components commonly used in treatment agents such as stabilizers, charge control agents, linkers, antioxidants, ultraviolet absorbers, defoaming agents, preservatives, and rust inhibitors, etc., other than those mentioned above, during or after the production of the treatment agent in order to maintain the quality of the treatment agent, within the range not impairing the effects of the present invention.

[0078] The treatment agent of the above embodiment does not necessarily need to contain the above nonionic surfactant (C) and ionic surfactant (D). In addition, the treatment agent may contain both the nonionic surfactant (C) and the ionic surfactant (D), or may contain either the nonionic surfactant (C) or the ionic surfactant (D).

[0079] In the treatment agent of the above embodiment, the ionic surfactant (D) may be a substance other than the sulfonic acid compound (D1) and the phosphoric acid ester compound (D2). In the treatment agent of the above-mentioned embodiment, other component (E) may be omitted. Example

[0080] In order to more specifically describe the composition and effect of the present invention, examples are given below, but the present invention is not limited to these examples. It should be noted that, in the following examples and comparative examples, unless otherwise stated, parts refer to parts by mass, and % refers to mass %.

[0081] Test group 1 (preparation of treatment agent) (Example 1) As shown in Table 1, a treatment agent of Example 1 was prepared, which contained the following components: 40 parts (%) of triester (A1-1) of trimethylolpropane and palm kernel fatty acid as a complete ester compound (A1) belonging to the smoothing agent (A), 20 parts (%) of pentaerythritol tetraoctanoate (A1-3), 0.1 parts (%) of laurylamine adipate EO4 salt (B-1) as a dicarboxylic acid compound (B), 10 parts (%) of a substance obtained by adding 12 mol of PO to 1 mol of isotridecanol (C-2) as a nonionic surfactant (C), and 10 parts (%) of a substance obtained by adding 10 mol of EO to 1 mol of hydrogenated castor oil (C-3). , 14 parts (%) of a compound (C-4) obtained by esterifying a substance obtained by adding 25 mol of EO to 1 mol of hydrogenated castor oil with 2 mol of oleic acid, 2 parts (%) of a substance obtained by adding 8 mol of EO to 1 mol of laurylamine (C-9), 1.85 parts (%) of a secondary alkane sulfonate sodium salt (an alkane having 11 to 14 carbon atoms) (D1-1) as a sulfonic acid compound (D1) belonging to an ionic surfactant (D), 2 parts (%) of isohexadecyl phosphate-dibutylethanolamine salt (D2-2) as a phosphate ester compound (D2), and 0.05 parts (%) of dimethyl polysiloxane (E-2) as another component (E).

[0082] (Examples 2 to 11, Comparative Examples 1 to 5) The treatment agents of Examples 2 to 11 and Comparative Examples 1 to 5 were prepared in the same manner as the treatment agent of Example 1, containing a smoothing agent (A), a dicarboxylic acid compound (B), a nonionic surfactant (C), an ionic surfactant (D), and other components (E) in the proportions shown in Table 1.

[0083] The type and content of the smoothing agent (A), the type and content of the dicarboxylic acid compound (B), the type and content of the nonionic surfactant (C), the type and content of the ionic surfactant (D), and the type and content of other components (E) are shown in the "Smoothing agent (A)" column, "Dicarboxylic acid compound (B)" column, "Nonionic surfactant (C)" column, "Ionic surfactant (D)" column, and "Other components (E)" column of Table 1, respectively.

[0084] [Table 1]

[0085] The details of the smoothing agent (A), the dicarboxylic acid compound (B), the nonionic surfactant (C), the ionic surfactant (D), and other components (E) described in Table 1 are as follows. <Smoothing Agent (A)> (Complete ester compound (A1)) A1-1: Trimethylolpropane triester with palm kernel fatty acid A1-2: Rapeseed oil A1-3: Pentaerythritol tetraoctanoate (Smoothing agent (A2) other than A1) A2-1: Diisocetyl adipate A2-2: Oleyl oleate A2-3: Di(oleyl)thiodipropionate <Dicarboxylic acid compound (B)> B-1: Laurylamine adipate EO4 salt (a product obtained by neutralizing adipic acid with 4 mol of ethylene oxide added to 1 mol of laurylamine at a ratio of 1:1 mol) B-2: Fumaric Acid B-3: Malic Acid B-4: Dipotassium malonic acid (a substance obtained by neutralizing malonic acid and potassium hydroxide at a ratio of 1:2 mol and then dehydrating) B-5: Dipotassium sebacic acid (a substance obtained by neutralizing sebacic acid and potassium hydroxide at a ratio of 1:2 mol and then dehydrating) <Carboxylic acid compound (rB) different from dicarboxylic acid compound (B)> rB-1: Dipotassium dodecenylsuccinate (a substance obtained by neutralizing and dehydrating dodecenylsuccinic acid and potassium hydroxide at a ratio of 1:2 mol) rB-2: triethanolamine tartrate (a substance obtained by neutralizing tartaric acid and triethanolamine at a ratio of 1:2 mol) rB-3: Potassium oleate (a substance obtained by neutralizing oleic acid and potassium hydroxide at a ratio of 1:1 mol and then dehydrating) <Nonionic surfactant (C)> C-1: 1 mol of oleyl alcohol plus 8 mol of EO C-2: A product obtained by adding 12 mol of EO to a product obtained by adding 12 mol of PO to 1 mol of isotridecanol C-3: A product obtained by adding 10 moles of EO to 1 mole of hydrogenated castor oil C-4: A compound obtained by esterifying 1 mol of hydrogenated castor oil with 25 mol of EO and 2 mol of oleic acid C-5: A compound obtained by adding 20 mol of EO to 1 mol of hydrogenated castor oil, cross-linking with adipic acid, and terminal esterification with stearic acid (mass average molecular weight 5000) C-6: Sorbitan monolaurate C-7: A substance obtained by adding 8 moles of EO to 1 mole of sorbitan monooleate C-8: Diester of polyethylene glycol (mass average molecular weight 400) and oleic acid C-9: 8 moles of EO added to 1 mole of lauryl amine C-10: 3 mol of EO added to 1 mol of oleic acid diethanolamide <Ionic surfactant (D)> (Sulfonic acid compound (D1)) D1-1: Sodium salt of secondary alkane sulfonate (alkanes with carbon atoms of 11 or more and 14 or less) D1-2: Di(2-ethylhexyl)sulfosuccinate sodium salt D1-3: α-olefin sulfonic acid sodium salt (Phosphate ester compound (D2)) D2-1: Phosphate ester of oleyl alcohol EO6 molar adduct-triethanolamine salt D2-2: Isocetyl phosphate-dibutylethanolamine salt (Ionic surfactants (D3) other than D1 and D2) D3-1: Sodium lauryl sulfate <Other ingredients (E)> E-1: Polyether modified silicone E-2: Dimethyl polysiloxane E-3: 6-(4-hydroxy-3,5-di-tert-butylanilino)-2,4-bis(octylthio)-1,3,5-triazine <Method for Determining the Content Ratio of Dicarboxylic Acid> The content ratio of the dicarboxylic acid constituting the dicarboxylic acid compound (B) relative to the total mass of the treatment agent can be measured by liquid chromatography-mass spectrometry (hereinafter referred to as LC / MS).

[0086] The LC / MS measurement was performed under the following conditions. Liquid chromatography (LC) Equipment used: UPLC H-Class manufactured by Waters Analytical column: RSpak DE-213 manufactured by Shodex (inner diameter 2.0 mm × length 150 mm) Column temperature: 40°C Mobile phase A: 0.1 mass% formic acid ultrapure aqueous solution Mobile phase B: 0.1 mass% formic acid acetonitrile solution Gradient conditions: 0 min (A / B = 95 vol%) → 5 min (A / B = 95 vol%) → 20 min (A / B = 5 vol%) → 30 min (A / B = 5 vol%) Flow rate: 0.2mL / min Mass spectrometry (MS) Device used: SQD2 manufactured by Waters Ionization mode: ESI SIM Negative The dicarboxylic acid of the dicarboxylic acid compound (B) used in the treatment agent was used as a standard to prepare a calibration curve, and the amount of dicarboxylic acid in the treatment agent was measured. The results are shown in the "ratio of dicarboxylic acid to the total mass of the treatment agent" column in Table 1. The measured amount of dicarboxylic acid is substantially the same as the amount of dicarboxylic acid calculated from the compounding amount of the dicarboxylic acid compound (B) when preparing the treatment agent.

[0087] Test group 2 (Evaluation of high temperature burr suppression effect) Each prepared synthetic fiber treatment agent is diluted with ion exchange water to prepare a 15% solution. The above solution is applied to a non-oiled polyethylene terephthalate fiber of 1000 dtex, 126 filaments, and a characteristic viscosity of 0.93 by a yarn guide oiling method in an amount of 0.6% by mass based on non-volatile components. The polyethylene terephthalate fiber with the solution attached is brought into contact with a satin chrome support rod with a surface temperature of 220°C and moved under the conditions of an initial tension of 1.5 kg and a yarn running speed of 300 m / min. The number of burrs of the fiber after contacting the support rod is measured by a burr counting device (manufactured by Toray Engineering Co., Ltd.) The number of burrs per 10 minutes is evaluated according to the following evaluation criteria. The results are shown in the "High Temperature Burrs" column of Table 1.

[0088] It should be noted that, in the present invention, the high temperature in the high-temperature burr suppression effect refers to 200° C. or higher. ·Evaluation criteria for high temperature burr suppression effect ◎◎(Excellent): The number of burrs is less than 5 ◎ (Good): The number of burrs is 5 or more and less than 8 ○ (Pass): The number of burrs is 8 or more and less than 10 × (failed): when the number of burrs is 10 or more Test group 3 (evaluation of permeability) Each prepared synthetic fiber treatment agent is diluted with ion exchange water to prepare a 10% solution. Polyglycerol polyglycidyl ether, which is an epoxy compound, is added to the solution as a known adhesive at a concentration of 5%. The solutions are mixed to prepare an aqueous liquid. Prepare a washed polyester taffeta. 5 μL of the prepared aqueous liquid is dripped onto the polyester taffeta. Visually confirm the aqueous liquid on the polyester taffeta. The aqueous liquid is in the form of droplets just after dripping, but the droplets disappear by penetrating into the polyester taffeta. Measure the time until the droplets disappear, and evaluate according to the following evaluation criteria. The results are shown in the "Permeability" column of Table 1.

[0089] ·Permeability evaluation criteria ○ (Pass): Less than 280 seconds × (failed): 280 seconds or more It should be noted that the evaluation of permeability is performed using polyglycerol polyglycidyl ether and polyester taffeta, but the effect of the present invention is not limited to the use of polyglycerol polyglycidyl ether and polyester taffeta. When evaluating the permeability of the adhesive relative to the synthetic fiber, polyglycerol polyglycidyl ether and polyester taffeta are used for convenience.

[0090] The results in Table 1 show that the high temperature burr suppression effect and permeability of the treatment agents of each example are all above acceptable. According to the present invention, the permeability of the adhesive between synthetic fibers and the high temperature burr suppression effect can be improved.

[0091] The present disclosure also includes the following aspects. (Note 1) A treatment agent for synthetic fibers, characterized in that it contains a smoothing agent (A) containing the following complete ester compound (A1) and the following dicarboxylic acid compound (B).

[0092] Complete ester compound (A1): a complete ester compound of a trivalent or higher and tetravalent or lower polyol and a monovalent carboxylic acid. Dicarboxylic acid compound (B): at least one selected from dicarboxylic acids having 3 to 10 carbon atoms and having 0 to 1 hydroxyl group in the molecule, and salts thereof.

[0093] (Note 2) The synthetic fiber processing agent according to Supplementary Note 1, wherein the dicarboxylic acid compound (B) has 4 to 6 carbon atoms.

[0094] (Note 3) The synthetic fiber processing agent according to Supplementary Note 1, wherein the dicarboxylic acid constituting the dicarboxylic acid compound (B) is contained in a ratio of 0.01 mass % to 1 mass % based on the total mass of the synthetic fiber processing agent.

[0095] (Note 4) The synthetic fiber processing agent according to Supplementary Note 1, wherein the complete ester compound (A1) is contained in a ratio of 25 mass % to 70 mass % based on the total mass of the synthetic fiber processing agent.

[0096] (Note 5) The synthetic fiber processing agent according to Supplementary Note 1, further comprising a nonionic surfactant (C) and an ionic surfactant (D).

[0097] (Note 6) The synthetic fiber processing agent according to Supplementary Note 5, wherein the ionic surfactant (D) includes at least one selected from the group consisting of a sulfonic acid compound (D1) and a phosphoric acid ester compound (D2).

[0098] (Note 7) A synthetic fiber characterized in that the synthetic fiber treatment agent according to any one of Supplementary Notes 1 to 6 is adhered thereto.

Claims

1. A treatment agent for synthetic fibers, characterized in that: Contains a smoothing agent (A) comprising the following complete ester compound (A1) and the following dicarboxylic acid compound (B), further comprising a nonionic surfactant (C) and an ionic surfactant (D), The ionic surfactant (D) comprises at least one selected from a sulfonic acid compound (D1) and a phosphate ester compound (D2), The content of the sulfonic acid compound (D1) is 5% by mass or less, and the content of the phosphate compound (D2) is 5% by mass or less, Complete ester compound (A1): a complete ester compound of a trivalent or higher and tetravalent or lower polyol and a monovalent carboxylic acid, Dicarboxylic acid compound (B): at least one selected from dicarboxylic acids having 3 to 10 carbon atoms and having 0 to 1 hydroxyl group in the molecule, and salts thereof.

2. The synthetic fiber treating agent according to claim 1, wherein The dicarboxylic acid compound (B) has 4 or more and 6 or less carbon atoms.

3. The synthetic fiber treating agent according to claim 1, wherein The dicarboxylic acid constituting the dicarboxylic acid compound (B) is contained in a ratio of 0.01 mass % to 1 mass % based on the total mass of the synthetic fiber processing agent.

4. The synthetic fiber processing agent according to claim 1, wherein The complete ester compound (A1) is contained in a ratio of 25 mass % or more and 70 mass % or less based on the total mass of the synthetic fiber processing agent.

5. A synthetic fiber, characterized in that: The synthetic fiber treating agent according to any one of claims 1 to 4 is adhered thereto.

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