Treatment agent for viscose rayon, viscose rayon, viscose rayon staple fiber, and method for producing spunlace nonwoven fabric

Abstract

The present invention addresses the problem of providing a treatment agent for viscose rayon and the like that can improve the effect of reducing blistering and reduce the occurrence of undesirable odor. The treatment agent for viscose rayon contains a fatty acid derivative, at least one selected from the group consisting of fatty acids and oils and fats, and an antioxidant. The content of the antioxidant in the treatment agent for viscose rayon is from 0.1% by mass to 10% by mass (inclusive). The fatty acid derivative is selected from compounds obtained by adding ethylene oxide at a ratio of 1-30 mol per 1 mol of a fatty acid having 12-24 carbon atoms. And at least one of a compound obtained by polymerizing 1 mole of ethylene glycol from 4 moles to 50 moles and an ester compound of a fatty acid having 12 to 24 carbon atoms from 1 mole to 2 moles. The fatty acid has 12 to 24 carbon atoms (inclusive). The grease is selected from at least one of vegetable oil, animal oil and hydrogenated oil of the vegetable oil and the animal oil.

Description

Technical Field

[0001] The present invention relates to a processing agent for viscose rayon, viscose rayon to which the processing agent for viscose rayon is attached, the viscose rayon staple fibers, and a method for producing spunlace nonwoven fabrics. Background Art

[0002] As raw material fibers used in nonwoven fabrics, natural fibers such as cotton fibers, regenerated fibers such as rayon, and synthetic resins such as polyolefins are known. Among them, viscose rayon, which is a regenerated fiber made from pulp, cotton linters, etc., has attracted attention from the perspectives of excellent biodegradability, hygroscopicity, and water absorption.

[0003] When manufacturing nonwoven fabrics, in order to impart various properties such as lubricity and bundling properties, a nonwoven fabric treatment agent containing a surfactant or the like is sometimes attached to the surface of the raw material fibers. Patent Document 1 discloses a spunlace fiber treatment agent that is attached to raw material fibers such as viscose rayon when manufacturing spunlace nonwoven fabrics. The spunlace fiber treatment agent contains a polyoxyalkylene derivative and a function imparting agent. Prior art literature Patent Literature

[0004] Patent Document 1: Japanese Patent No. 6132966 Summary of the invention Problems to be solved by the invention

[0005] However, the existing spunlace fiber treatment agent has the problem of insufficiently balancing the reduction of shedding and foaming (i.e., the suppression of the foaming of water used in the water flow entanglement in the nonwoven fabric manufacturing process due to the mixing of the treatment agent that has fallen off the raw fibers) and the reduction of the odor of the raw fibers to which the spunlace fiber treatment agent is attached. Means of solving problems

[0006] The present inventors have conducted studies to solve the above-mentioned problems and have found that a processing agent for viscose rayon containing three specific components is exactly suitable. Various aspects of the processing agent for viscose rayon that solve the above-mentioned problems are described.

[0007] The main point of the viscose rayon treatment agent of embodiment 1 is that it contains the following fatty acid derivatives, at least one selected from the following fatty acids and fats, and an antioxidant. The fatty acid derivative is at least one selected from a compound formed by adding ethylene oxide at a ratio of 1 mol to 30 mol per mol of a fatty acid having 12 to 24 carbon atoms, and an ester compound formed by polymerizing 4 mol to 50 mol of ethylene glycol to 1 mol and 1 mol to 2 mol of a fatty acid having 12 to 24 carbon atoms. The fatty acid is a fatty acid having 12 to 24 carbon atoms. The fat is at least one selected from a vegetable oil, an animal oil, and hydrogenated oils thereof.

[0008] Regarding the viscose rayon processing agent of embodiment 2, in the viscose rayon processing agent described in embodiment 1, when the total content ratio of the above-mentioned fatty acid derivative, at least one selected from the above-mentioned fatty acid and the above-mentioned oil and fat, and the above-mentioned antioxidant is set to 100 parts by mass, the above-mentioned fatty acid derivative can be contained in a ratio of 80 parts by mass to 99.89 parts by mass, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil and fat can be contained in a ratio of 0.01 parts by mass to 10 parts by mass, and the above-mentioned antioxidant can be contained in a ratio of 0.1 parts by mass to 10 parts by mass.

[0009] The viscose rayon treatment agent of embodiment 3 may further contain at least one selected from the following lubricant and anionic surfactant in the viscose rayon treatment agent of embodiment 1. The lubricant is selected from at least one selected from hydrocarbon compounds, ester compounds (excluding the above oils and fats and the above fatty acid derivatives), and silicone.

[0010] Regarding the viscose rayon processing agent of embodiment 4, the viscose rayon processing agent described in embodiment 3 contains the above-mentioned fatty acid derivative, at least one selected from the above-mentioned fatty acid and the above-mentioned oil, the above-mentioned antioxidant, and the above-mentioned lubricant. When the total content ratio of the above-mentioned fatty acid derivative, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil, the above-mentioned antioxidant, and the above-mentioned lubricant is set to 100 parts by mass, the above-mentioned fatty acid derivative can be contained in a ratio of 60 parts by mass to 98.89 parts by mass, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil can be contained in a ratio of 0.01 parts by mass to 10 parts by mass, the antioxidant can be contained in a ratio of 0.1 parts by mass to 10 parts by mass, and the lubricant can be contained in a ratio of 1 part by mass to 20 parts by mass.

[0011] Regarding the viscose rayon processing agent of embodiment 5, the viscose rayon processing agent described in embodiment 3 contains the above-mentioned fatty acid derivative, at least one selected from the above-mentioned fatty acid and the above-mentioned oil, the above-mentioned antioxidant, and the above-mentioned anionic surfactant. When the total content ratio of the above-mentioned fatty acid derivative, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil, the above-mentioned antioxidant, and the above-mentioned anionic surfactant is set to 100 parts by mass, the above-mentioned fatty acid derivative can be contained in a ratio of 60 parts by mass to 98.89 parts by mass, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil can be contained in a ratio of 0.01 parts by mass to 10 parts by mass, the antioxidant can be contained in a ratio of 0.1 parts by mass to 10 parts by mass, and the anionic surfactant can be contained in a ratio of 1 part by mass to 20 parts by mass.

[0012] Regarding the viscose rayon processing agent of embodiment 6, the viscose rayon processing agent described in embodiment 3 contains the above-mentioned fatty acid derivative, at least one selected from the above-mentioned fatty acid and the above-mentioned oil, the above-mentioned antioxidant, the above-mentioned lubricant, and the above-mentioned anionic surfactant, and when the total content ratio of the above-mentioned fatty acid derivative, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil, the above-mentioned antioxidant, the above-mentioned lubricant, and the above-mentioned anionic surfactant is set to 100 parts by mass, the above-mentioned fatty acid derivative can be contained in a ratio of 40 parts by mass to 97.89 parts by mass, the at least one selected from the above-mentioned fatty acid and the above-mentioned oil can be contained in a ratio of 0.01 parts by mass to 10 parts by mass, the antioxidant can be contained in a ratio of 0.1 parts by mass to 10 parts by mass, the lubricant can be contained in a ratio of 1 part by mass to 20 parts by mass, and the anionic surfactant can be contained in a ratio of 1 part by mass to 20 parts by mass.

[0013] Regarding the processing agent for viscose rayon of aspect 7, in the processing agent for viscose rayon described in any one of aspects 1 to 6, the viscose rayon may be viscose rayon staple fibers.

[0014] Various methods of viscose rayon for solving the above-mentioned problems are described. The viscose rayon of aspect 8 is characterized in that the treatment agent for viscose rayon described in any one of aspects 1 to 7 is adhered thereto.

[0015] The viscose rayon staple fibers of aspect 9 are characterized in that the viscose rayon treating agent described in any one of aspects 1 to 7 is adhered thereto. A method for producing a spunlace nonwoven fabric that solves the above-mentioned problems is described.

[0016] The gist of the method for producing a spunlace nonwoven fabric of embodiment 10 is that it includes the following steps 1 and 2. Step 1 is a step of carding the viscose rayon staple fibers of embodiment 9 to produce a carded web. Step 2 is a step of entangle the carded web obtained in step 1 with water flow. Effects of the Invention

[0017] According to the present invention, the effect of reducing shedding and blistering can be improved, and the generation of odor of viscose rayon can be reduced. DETAILED DESCRIPTION

[0018] (First embodiment) The first embodiment of the treatment agent for viscose rayon of the present invention (hereinafter referred to as "treatment agent") is described below. The treatment agent contains the following fatty acid derivatives, at least one selected from the following fatty acids and fats, and an antioxidant. The fatty acid derivative is a compound formed by adding ethylene oxide at a ratio of 1 mole to 30 moles relative to 1 mole of fatty acids with carbon atoms of 12 or more and 24 or less, and at least one of ester compounds of 1 mole to 2 moles of fatty acids with carbon atoms of 12 or more and 24 or less. The fatty acid is a fatty acid with carbon atoms of 12 or more and 24 or less. The fat is at least one selected from vegetable oils, animal oils, and their hydrogenated oils. The treatment agent may further contain a lubricant and / or an anionic surfactant as needed.

[0019] <About fatty acid derivatives (A)> The fatty acid derivative (A) provided in the treatment agent of the present embodiment is at least one selected from a compound formed by adding ethylene oxide in a ratio of 1 mol to 30 mol relative to 1 mol of a fatty acid having 12 to 24 carbon atoms, and an ester compound of a compound formed by polymerizing 4 mol to 50 mol of ethylene glycol to 1 mol and 1 mol to 2 mol of a fatty acid having 12 to 24 carbon atoms.

[0020] The fatty acid constituting the raw material of the fatty acid derivative (A) can be appropriately known substances, and can be a saturated fatty acid or an unsaturated fatty acid. In addition, it can be a straight-chain fatty acid or a fatty acid with a branched structure. The carbon number of the fatty acid is more than 12 and less than 24, preferably more than 12 and less than 22. It is also possible to imagine the range formed by arbitrarily combining the above upper and lower limits.

[0021] The addition mole number of ethylene oxide is more than 1 mole and less than 30 moles, preferably more than 2 moles and less than 25 moles. It is also possible to imagine the range formed by any combination of the above upper and lower limits. It should be noted that the addition mole number of ethylene oxide represents the mole number of ethylene oxide relative to 1 mole of fatty acid as a raw material.

[0022] Specific examples of the fatty acid derivative (A) include: (1) polyoxyethylene alkyl (or alkylene) esters obtained by addition reaction of ethylene oxide with saturated or unsaturated fatty acids, such as a compound obtained by adding 20 mol of ethylene oxide to 1 mol of oleic acid, a compound obtained by adding 10 mol of ethylene oxide to 1 mol of oleic acid, a compound obtained by adding 30 mol of ethylene oxide to 1 mol of oleic acid, a compound obtained by adding 5 mol of ethylene oxide to 1 mol of stearic acid, a compound obtained by adding 10 mol of ethylene oxide to 1 mol of stearic acid, and a compound obtained by adding 10 mol of ethylene oxide to 1 mol of lauric acid; (2) ester compounds of 1 mol of a compound obtained by polymerizing 9 mol of ethylene glycol and 1 mol of oleic acid, 1 mol of a compound obtained by polymerizing 14 mol of ethylene glycol, and 1 mol of ethylene oxide. (3) esters of polyoxyethylene fatty acids derived from oils and fats obtained by the addition reaction of ethylene oxide with naturally derived fatty acids, such as a compound obtained by adding 30 mol of ethylene oxide to 1 mol of castor oil, a compound obtained by adding 10 mol of ethylene oxide to 1 mol of hydrogenated castor oil, and a compound obtained by adding 10 mol of ethylene oxide to 1 mol of coconut oil fatty acids.

[0023] Among the fatty acid derivatives (A), one fatty acid derivative may be used alone, or two or more fatty acid derivatives may be used in combination. In the treatment agent, the lower limit of the content ratio of the fatty acid derivative (A) is preferably 30 mass % or more, more preferably 40 mass % or more. In addition, the upper limit of the content ratio of the fatty acid derivative (A) is preferably 95 mass % or less, more preferably 92 mass % or less. By being specified as the range of the content ratio, the effect of the present invention can be further improved. In one embodiment of the present invention, the content of the fatty acid derivative (A) in the treatment agent is, for example, 40 mass % or more, 60 mass % or more, 69 mass % or more, 70 mass % or more, 72 mass % or more, 75 mass % or more, 80 mass % or more, 82 mass % or more, 84 mass % or more, 86 mass % or more, 87 mass % or more, or 90.8 mass % or more. In addition, similarly, the content of the fatty acid derivative (A) in the treatment agent is, for example, 92% by mass or less, 90.8% by mass or less, 87% by mass or less, 86% by mass or less, 84% by mass or less, 82% by mass or less, 80% by mass or less, 75% by mass or less, 72% by mass or less, 70% by mass or less, 69% by mass or less, or 60% 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 envisioned.

[0024] <About fatty acids (B1) and oils (B2)> The fatty acid (B1) provided in the treatment agent of the present embodiment is a fatty acid having a carbon number of 12 or more and 24 or less. The fatty acid having a carbon number of 12 or more and 24 or less can be appropriately a known substance. It can be a saturated fatty acid or an unsaturated fatty acid. In addition, it can be a straight chain or have a branched structure. The carbon number of the fatty acid (B1) is 12 or more and 24 or less, preferably 12 or more and 22 or less. It is also possible to conceive of a range in which the above upper and lower limits are arbitrarily combined. Specific examples of fatty acids (B1) include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, lignoceric acid, coconut oil fatty acids, and the like.

[0025] The fat (B2) used in the treatment agent of the present embodiment is at least one selected from vegetable oils, animal oils, and hydrogenated oils thereof. Specific examples of the fat (B2) include castor oil, sesame oil, tall oil, palm oil, palm kernel oil, coconut oil, rapeseed oil, lard, tallow, whale oil, and hydrogenated oils thereof, such as hydrogenated castor oil and hydrogenated palm oil.

[0026] Regarding the fatty acids (B1) and fats and oils (B2), one type of the fatty acids and / or fats and oils may be used alone, or two or more types of the fatty acids and / or fats and oils may be used in combination. In the treatment agent, the lower limit of the content ratio of at least one selected from fatty acids (B1) and oils (B2) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. By specifying the range of the content ratio, the effect of reducing shedding and foaming can be further improved. In addition, the upper limit of the content ratio of this component is preferably 15% by mass or less, more preferably 10% by mass or less. By specifying the range of the content ratio, the emulsification stability of the treatment agent can be further improved. In one embodiment of the present invention, the total content of fatty acids (B1) and oils (B2) in the treatment agent is, for example, 0.05% by mass or more, 0.5% by mass or more, 1% 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, or 9% by mass or more. Similarly, the total content of the fatty acid (B1) and the oil (B2) in the treatment agent is, for example, 10% by mass or less, 9% 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, 1% by mass or less, or 0.5% by mass or less. It should be noted that any combination of the above upper and lower limits may be envisioned.

[0027] <About Antioxidants (C)> As the antioxidant (C) provided in the treatment agent of the present embodiment, a known substance can be appropriately used. Specific examples of the antioxidant (C) include: (1) 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione, 1,3,5-tris(3′,5′-di-tert-butyl-4-hydroxybenzyl)isocyanuric acid, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene, 2,2′-methylene-bis(4-methyl-6-tert-butylphenol), Phenolic antioxidants such as 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and pentaerythritol = tetrakis[3-(3′,5′-di-tert-butyl-4′-hydroxyphenyl)propionate]; (2) thioether antioxidants such as 4,4′-thiobis-(6-tert-butyl-3-methylphenol), dilauryl-3,3′-thiodipropionate, 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl = bis[3-(dodecylthio)propionate], di(tridecyl)-1-yl = 3,3′-thioanediyldipropionate; (3) 3,9 -bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(mixed, mono- and dinonylphenyl)phosphites, tris(2,3-di-tert-butylphenyl)phosphites, 4,4′-butylene-bis(3-methyl-6-tert-butylphenyl-bis-tridecyl)phosphites, 1,1,3-tris(2-methyl-4-di-tridecylphosphite-5-tert-butylphenyl)butane, tris(2,4-di-tert-butylphenyl)phosphites, bis(2,4-di-tert-butylphenyl)pentaerythritol-diphosphites, tetrakis(2,4-di-tert-butylphenyl)phosphites Phosphorus antioxidants such as tert-butylphenyl)-4,4′-biphenylene phosphite, bis(2,6-di-tert-butyl-4-methylphenyl) pentaerythritol-diphosphite, tetrakis(2,4-di-tert-butylphenyl)-4,4′-biphenylene diphosphite, tritetradecyl-4,4′-butylene-bis-(2-tert-butyl-5-methylphenol) diphosphite, triphenyl phosphite, decyl diphenyl phosphite, tridecyl phosphite, trioctyl phosphite, trilauryl phosphite, trioctadecyl phosphite, trinonylphenyl phosphite, trilauryl trithiophosphite, and octyl diphenyl phosphite; and the like.

[0028] Regarding the antioxidant (C), one antioxidant may be used alone or two or more antioxidants may be used in combination. When one antioxidant is used alone, it is preferred to use a phenolic antioxidant or a thioether antioxidant. In the case of this configuration, the effect of the present invention, in particular, the effect of reducing the odor of the fiber to which the treatment agent is attached, can be further improved. When two or more antioxidants are used in combination, it is preferred to use a phenolic antioxidant and a thioether antioxidant together. In the case of this configuration, the effect of reducing the odor can be further improved.

[0029] In the treatment agent of the present embodiment, the content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acid (B1) and oil (B2), and antioxidant (C) in the treatment agent is not particularly limited. When the total content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acid (B1) and oil (B2), and antioxidant (C) is set to 100 parts by mass, it is preferably formed by containing fatty acid derivative (A) at a ratio of 80 parts by mass or more and 99.89 parts by mass or less, containing at least one selected from fatty acid (B1) and oil (B2) at a ratio of 0.01 parts by mass or more and 10 parts by mass or less, and containing antioxidant (C) at a ratio of 0.1 parts by mass or more and 10 parts by mass or less. In the case of this configuration, the effect of the present invention can be further improved.

[0030] In the treatment agent, the lower limit of the content ratio of the antioxidant (C) is preferably 0.1% by mass or more, more preferably 0.15% by mass or more. By specifying the range of the content ratio, the effect of reducing the odor of the fiber attached with the treatment agent can be particularly improved. In addition, the upper limit of the content ratio of the antioxidant (C) is preferably 15% by mass or less, more preferably 10% by mass or less. By specifying the range of the content ratio, the emulsification stability of the treatment agent can be further improved. In one embodiment of the present invention, the content of the antioxidant (C) in the treatment agent is, for example, 0.15% 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, 7% by mass or more, 9% by mass or more, or 9.5% by mass or more. In addition, similarly, the content of the antioxidant (C) in the treatment agent is, for example, 10% by mass or less, 9.5% by mass or less, 9% by mass or less, 7% by mass or less, 5% by mass or less, 4% by mass or less, 3% by mass or less, 2% by mass or less, or 1% by mass or less. It should be noted that a range formed by arbitrarily combining the above upper limits and lower limits is also conceivable.

[0031] <About Lubricant (D)> The treatment agent (D) of this embodiment may further contain at least one lubricant selected from hydrocarbon compounds, ester compounds (excluding the fatty acid derivatives (A) and the oils (B2)), and silicones. By mixing the lubricant (D), the effects of the present invention, especially the card passability, can be further improved.

[0032] Specific examples of the hydrocarbon compound include mineral oil and paraffin. Specific examples of ester compounds include ester compounds of aliphatic monohydric alcohols such as butyl stearate and stearyl stearate and aliphatic monocarboxylic acids, ester compounds of aliphatic polyhydric alcohols such as glycerol monooleate, glycerol trioleate, sorbitan monolaurate, sorbitan trilaurate, sorbitan monooleate, sorbitan trioleate, sorbitan monostearate, sorbitan tristearate and aliphatic monocarboxylic acids, etc. It should be noted that the ester compound used as a lubricant refers to a compound obtained by reacting a fatty acid with an alcohol and does not include the above-mentioned fatty acid derivative (A) and the above-mentioned oil (B2).

[0033] Specific examples of silicone include dimethyl silicone, amino silicone, amino-modified silicone, and polyoxyalkylene-modified silicone. Regarding the lubricant (D), one type of lubricant may be used alone, or two or more types of lubricants may be used in combination.

[0034] When the treatment agent of the present embodiment contains the above-mentioned fatty acid derivative (A) in the treatment agent, at least one selected from fatty acid (B1) and oil (B2), antioxidant (C), and lubricant (D), their content ratio is not particularly limited. When the total content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acid (B1) and oil (B2), antioxidant (C), and lubricant (D) is set to 100 parts by mass, it is preferably composed of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from fatty acid (B1) and oil (B2) at a ratio of 0.01 parts by mass or more and 10 parts by mass or less, antioxidant (C) at a ratio of 0.1 parts by mass or more and 10 parts by mass or less, and lubricant (D) at a ratio of 1 part by mass or more and 20 parts by mass or less. The effect of the present invention can be further improved.

[0035] In the treatment agent, the lower limit of the content ratio of the lubricant (D) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying the range of the content ratio, the carding machine passability can be particularly improved. In addition, the upper limit of the content ratio of the lubricant (D) is preferably 25% by mass or less, more preferably 20% by mass or less. By specifying the range of the content ratio, the emulsification stability of the treatment agent can be further improved. In one embodiment of the present invention, the content of the lubricant (D) in the treatment agent is, for example, 1% by mass or more, 5% by mass or more, 9% by mass or more, 10% by mass or more, or 15% by mass or more. In addition, similarly, the content of the lubricant (D) in the treatment agent is, for example, 20% by mass or less, 15% by mass or less, 10% by mass or less, 9% by mass or less, or 5% 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 envisioned.

[0036] <About anionic surfactant (E)> The treatment agent of the present embodiment may further contain an anionic surfactant (E). By blending the anionic surfactant (E), the effects of the present invention, in particular, the emulsion stability when the treatment agent is prepared as an aqueous liquid can be further enhanced.

[0037] As the anionic surfactant (E), known substances can be appropriately used. Specific examples of the anionic surfactant (E) include: (1) phosphate salts of fatty alcohols such as lauryl phosphate salts, cetyl phosphate salts, octyl phosphate salts, oleyl phosphate salts, and stearyl phosphate salts; (2) phosphate esters of substances obtained by adding at least one alkylene oxide selected from ethylene oxide and propylene oxide to fatty alcohols such as polyoxyethylene lauryl ether phosphate salts, polyoxyethylene oleyl ether phosphate salts, and polyoxyethylene stearyl ether phosphate salts; salts; (3) aliphatic sulfonates or aromatic sulfonates such as lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecane sulfonate, dodecylbenzene sulfonate, and secondary alkyl sulfonic acid (C13-C15) salts; (4) sulfate esters of fatty alcohols such as lauryl sulfate esters, oleyl sulfate esters, and stearyl sulfate esters; (5) polyoxyethylene lauryl ether sulfate esters, polyoxyalkylenes (polyoxyethylene, polyoxypropylene) Sulfate salts of substances obtained by adding at least one alkylene oxide selected from ethylene oxide and propylene oxide to aliphatic alcohols, such as lauryl ether sulfate salts and polyoxyethylene oleyl ether sulfate salts; (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, lard fatty acid sulfate salts, tallow fatty acid sulfate salts, and whale 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, lard sulfate salts, tallow sulfate salts, and whale oil sulfate salts; (8) Fatty acid salts, such as laurate, oleate, and stearate; (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, and alkanolamine salts such as triethanolamine.

[0038] Regarding the anionic surfactant (E), one type of the anionic surfactant may be used alone, or two or more types of the anionic surfactants may be used in combination. The treatment agent of the present embodiment contains the above-mentioned fatty acid derivative (A) in the treatment agent, at least one selected from fatty acid (B1) and oil (B2), antioxidant (C), and anionic surfactant (E), and their content ratio is not particularly limited. When the total content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acid (B1) and oil (B2), antioxidant (C), and anionic surfactant (E) is set to 100 parts by mass, it is preferably composed of 60 parts by mass or more and 98.89 parts by mass or less, 0.01 parts by mass or more and 10 parts by mass or less at least one selected from fatty acid (B1) and oil (B2), 0.1 parts by mass or more and 10 parts by mass or less antioxidant (C), and 1 part by mass or more and 20 parts by mass or less anionic surfactant (E) is contained. In the case of this structure, the effect of the present invention can be further improved.

[0039] In addition, when the treatment agent of the present embodiment contains the above-mentioned fatty acid derivative (A) in the treatment agent, at least one selected from fatty acid (B1) and oil (B2), antioxidant (C), lubricant (D), and anionic surfactant (E), there is no particular restriction on their content ratio. When the total content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acid (B1) and oil (B2), antioxidant (C), lubricant (D), and anionic surfactant (E) is set to 100 parts by mass, it is preferably contained in a ratio of 40 parts by mass or more and 97.89 parts by mass or less, at least one selected from fatty acid (B1) and oil (B2) is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, antioxidant (C) is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, lubricant (D) is contained in a ratio of 1 parts by mass or more and 20 parts by mass or less, and anionic surfactant (E) is contained in a ratio of 1 parts by mass or more and 20 parts by mass or less. In the case of this structure, the effect of the present invention can be further improved.

[0040] In the treatment agent, the lower limit of the content ratio of the anionic surfactant (E) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying the range of the content ratio, the emulsification stability of the treatment agent can be further improved. In addition, the upper limit of the content ratio of the anionic surfactant (E) is preferably 25% by mass or less, more preferably 20% by mass or less. By specifying the range of the content ratio, the effect of reducing the falling foaming can be further improved. In one embodiment of the present invention, the content of the anionic surfactant (E) in the treatment agent is, for example, 1% by mass or more, 2% by mass or more, 4% by mass or more, 5% by mass or more, 9% by mass or more, 10% by mass or more, 13% by mass or more, or 15% by mass or more. In addition, similarly, the content of the anionic surfactant (E) in the treatment agent is, for example, 20% by mass or less, 15% by mass or less, 13% by mass or less, 10% by mass or less, 9% by mass or less, 5% by mass or less, 4% by mass or less, or 2% 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 envisioned.

[0041] <About other ingredients> The treatment agent of the present embodiment may further contain nonionic surfactants other than those described above, polyols, and the like as other components within a range not impairing the effects of the present invention.

[0042] Specific examples of nonionic surfactants include: (1) compounds obtained by adding 10 mol of ethylene oxide to 1 mol of lauryl alcohol, compounds obtained by adding 5 mol of ethylene oxide to 1 mol of stearyl alcohol, compounds obtained by adding 30 mol of ethylene oxide to 1 mol of oleyl alcohol, compounds obtained by adding 10 mol of ethylene oxide to 1 mol of C12-13 alcohol, compounds obtained by randomly adding 10 mol of ethylene oxide and 10 mol of propylene oxide to 1 mol of lauryl alcohol, and the like. Polyoxyalkylene alkyl (or alkenyl) ethers obtained by addition reaction of alkylene oxide with a saturated or unsaturated aliphatic monohydric alcohol, such as a compound obtained by randomly adding 6 mol of ethylene oxide and 2 mol of propylene oxide to 1 mol of C12-13 alcohol, a compound obtained by adding 5 mol of ethylene oxide and then 5 mol of propylene oxide to 1 mol of isodecyl alcohol, and a compound obtained by adding 2 mol of propylene oxide and then 5 mol of ethylene oxide to 1 mol of isodecyl alcohol; (2) a polyoxyalkylene alkyl (or alkenyl) ether obtained by addition reaction of alkylene oxide with a saturated or unsaturated aliphatic monohydric alcohol, such as a compound obtained by randomly adding 6 mol of ethylene oxide and 2 mol of propylene oxide to 1 mol of C12-13 alcohol, a compound obtained by adding 5 mol of ethylene oxide and then 5 mol of propylene oxide to 1 mol of isodecyl alcohol; (3) a polyoxyalkylene alkyl (or alkenyl) ether obtained by addition reaction of alkylene oxide with a saturated or unsaturated aliphatic monohydric alcohol; (4) a polyoxyalkylene alkyl (or alkenyl) ether obtained by addition reaction of alkylene oxide with a saturated or unsaturated aliphatic monohydric alcohol; (5) a polyoxyalkylene alkyl (or alkenyl) ether obtained by addition reaction of alkylene oxide with a saturated or unsaturated aliphatic monohydric alcohol; (6) a polyoxyalkylene alkyl (or alkenyl) ether obtained by randomly adding 6 mol of ethylene oxide and 2 mol of propylene oxide to 1 mol of C12-13 alcohol, a compound obtained by adding 5 mol of ethylene oxide and then 5 mol of propylene oxide to 1 mol of isodecyl alcohol; (7) a polyoxyalkyl (3) polyoxyalkylene polyol ethers obtained by addition reaction of alkylene oxide with aliphatic polyols, such as a compound formed by adding 1 mol of lauric acid to 1 mol of ethylene oxide, a compound formed by adding 20 mol of ethylene oxide to 1 mol of sorbitol and then adding 1 mol of oleic acid, a compound formed by adding 20 mol of ethylene oxide to 1 mol of sorbitol and then adding 1 mol of stearic acid, and a compound formed by adding 20 mol of ethylene oxide to 1 mol of sorbitol and then adding 3 mol of stearic acid; (4) polyoxyalkylene polyol ethers obtained by addition reaction of alkylene oxide with aliphatic polyols, such as a compound formed by adding 1 mol of ethylene oxide to 1 mol of ethylene oxide, a compound formed by adding 1 mol of oleic acid to 1 mol of sorbitol, a compound formed by adding 1 mol of stearic acid to 1 mol of sorbitol and then adding 1 mol of ethylene oxide; (5) polyoxyalkylene polyol ethers obtained by addition reaction of alkylene oxide with aliphatic polyols, such as a compound formed by adding 1 mol of ethylene oxide to 1 mol of ethylene oxide, a compound formed by adding 1 mol of oleic acid to 1 mol of sorbitol, a compound formed by adding 1 mol of stearic acid to 1 mol of sorbitol, and a compound formed by adding 20 mol of ethylene oxide to 1 mol of stearic acid; (4) polyoxyalkylene amino ethers obtained by addition reaction of alkylene oxide with saturated or unsaturated aliphatic amines, such as a compound formed by adding 5 mol of ethylene oxide to octyl amine, a compound formed by adding 8 mol of ethylene oxide to lauryl amine, a compound formed by adding 20 mol of ethylene oxide to stearyl amine, etc. It should be noted that when two or more alkylene oxides are used, their addition method may be any of block addition, random addition, and a combination of block addition and random addition, without particular limitation.

[0043] Specific examples of the polyol include ethylene glycol, propylene glycol, pentylene glycol, hexylene glycol, glycerin, pentaerythritol, sorbitol, sorbitan, polyethylene glycol, polypropylene glycol, and a reaction product of propylene glycol and an alkylene oxide.

[0044] These other components may be used alone or in combination of two or more. The content of these other components in the treatment agent is preferably 50% by mass or less, more preferably 10% by mass or less, and even more preferably 1% by mass or less, from the viewpoint of not hindering the effects of the present invention.

[0045] The viscose rayon to which the treatment agent of the present embodiment is applied may be a long fiber commonly referred to as a filament, or may be a short fiber commonly referred to as a cut fiber. Preferably, the short fiber. The length of the short fiber in the present embodiment is not particularly limited as long as it is equivalent to the length of the short fiber in the technical field, and is, for example, preferably less than 100 mm, more preferably less than 51 mm.

[0046] According to the first embodiment, the following effects can be obtained. (1) The treatment agent of the present embodiment comprises the above-mentioned fatty acid derivative (A), at least one selected from fatty acid (B1) and oil (B2), and antioxidant (C). Therefore, the effect of suppressing the bubbling of water used in water entanglement due to the mixing of the treatment agent that has fallen off from the viscose rayon when the viscose rayon with the treatment agent attached is water entangled can be improved (i.e., the effect of reducing the falling foaming can be improved). As a result, in the spunlace nonwoven fabric production process, the operating efficiency can be improved. In addition, the generation of odor of the viscose rayon with the treatment agent attached can be reduced. In addition, the discoloration of the viscose rayon with the treatment agent attached can be reduced. In addition, the passability of the viscose rayon with the treatment agent attached through the carding machine can be improved. In addition, the emulsification stability when the treatment agent is prepared as an aqueous liquid can be improved.

[0047] (Second embodiment) Next, a second embodiment of the viscose rayon of the present invention will be described. The viscose rayon of this embodiment has the treatment agent of the first embodiment attached thereto.

[0048] As a method for attaching the treatment agent, known methods such as dipping, spraying, showering, rolling, dripping and flowing down can be applied. In addition, the process for attaching the treatment agent is not particularly limited, and examples thereof include a post-refining process, a spinning process, and the like.

[0049] The viscose rayon treated with the treating agent of the present embodiment can be the above-mentioned viscose rayon. As the form of the treatment agent when attached to the viscose rayon, for example, an aqueous liquid, an organic solvent solution, etc. can be cited. Regarding the treatment method of viscose rayon, it is preferred that the treatment agent of the first embodiment is diluted with water to form an aqueous liquid with a concentration of 0.5 to 20% by mass, and the aqueous liquid is attached to the viscose rayon. Regarding the amount of the treatment agent attached, it is preferred that the treatment agent be attached in a manner such that the solid content not including the solvent is 0.1 to 1% by mass relative to the viscose rayon.

[0050] (Third embodiment) A third embodiment of the method for producing a spunlace nonwoven fabric of the present invention will be described.

[0051] The spunlace nonwoven fabric is produced by sequentially performing a carded web forming step (step 1) of carding viscose rayon to produce a carded web, and a water flow entangling step (step 2) of entangling the carded web with water flow.

[0052] (Card web forming process) The carding web forming step is a step of carding the viscose rayon to which the treatment agent is attached to produce a carding web. Carding can be performed using a known carding machine, such as a flat carding machine, a combination carding machine, a roller carding machine, etc.

[0053] (Water flow intertwining process) The water flow intertwining step is a step of intertwining the carded web obtained in the carded web forming step with water flow. By spraying high-pressure water flow on the carded web, the pressure of the water flow can intertwine the fibers with each other to form a sheet. After the water flow intertwining step, a drying step and a winding step can be appropriately performed.

[0054] According to the second and third embodiments, in addition to the effect of (1) described above, the following effects can be obtained. (2) Since the effect of reducing the shedding and blistering can be improved, the water used for the hydroentanglement can be circulated to perform the hydroentanglement. Therefore, the hydroentanglement can be appropriately performed, and the texture of the spunlace nonwoven fabric can be improved.

[0055] The first to third embodiments can be implemented with modifications as follows. The first to third embodiments and the following modifications can be implemented in combination with each other within a range that does not technically contradict each other.

[0056] The treatment agent of the above embodiment may further contain components commonly used in treatment agents, such as surfactants, antistatic agents, linkers, ultraviolet absorbers, and pH adjusters, for maintaining the quality of the treatment agent as other components other than the above, within a range that does not hinder the effects of the present invention. Example

[0057] In order to more specifically explain the configuration and effects of the present invention, examples are given below, but the present invention is not limited to these examples. Test Group 1 <Preparation of Treatment Agent> (Example 1) The following materials were used as raw materials of the treatment agent. The numerical values ​​of the components shown in Table 1 represent the content in the treatment agent.

[0058] Fatty acid derivative (A): a compound obtained by adding 20 moles of ethylene oxide to 1 mole of oleic acid Fatty acid (B): stearic acid Antioxidant (C): 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione as a phenolic antioxidant and ditridecane-1-yl=3,3′-sulfanediyl dipropionate as a thioether antioxidant Lubricant (D): Stearyl stearate Anionic surfactant (E): Potassium lauryl phosphate 900 parts of water were added to 100 parts of the treatment agent prepared according to the content ratio shown in Table 1, and the mixture was stirred at 50° C. to prepare a 10% aqueous liquid containing 10% by mass of the treatment agent.

[0059] (Examples 2 to 24 and Comparative Examples 1 to 8) The treatment agents of Examples 2 to 24 and Comparative Examples 1 to 8 were prepared in the same manner as in the preparation of the treatment agent of Example 1 and its aqueous solution, and their 10% aqueous solutions were prepared.

[0060] The contents of the treatment agents of the above-prepared examples are summarized in Table 1. The treatment agents of Examples 3 to 4, 6, 8, 24 and Comparative Examples 1 to 2, 6 contain nonionic surfactants and / or polyols as other components. In Example 24 of Table 1, the contents (parts by mass (*)) of other components are expressed as parts by mass relative to 100 parts by mass of the total of components (A) to (E).

[0061] The type and content of fatty acid derivatives (A), the type and content of fatty acids (B1) or oils (B2), the type and content of antioxidants (C), the type and content of lubricants (D), the type and content of anionic surfactants (E), and the types and contents of other components are shown in the "Fatty acid derivatives (A)" column, "Fatty acids, oils and fats (B)" column, "Antioxidant (C)" column, "Lubricant (D)" column, "Anionic surfactant (E)" column, and "Other components" column of Table 1, respectively.

[0062] [Table 1]

[0063] The details of the fatty acid derivative (A), fatty acid (B1) or oil (B2), antioxidant (C), lubricant (D), anionic surfactant (E), and other components described in Table 1 are as follows.

[0064] (Fatty acid derivatives (A)) A-1: Compound obtained by adding 20 moles of ethylene oxide to 1 mole of oleic acid A-2: Compound obtained by adding 5 mol of ethylene oxide to 1 mol of stearic acid A-3: Compound obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid A-4: ester compound of 1 mol of a compound obtained by polymerizing 9 mol of ethylene glycol and 2 mol of lauric acid A-5: ester compound of 1 mol of a compound obtained by polymerizing 23 mol of ethylene glycol and 2 mol of stearic acid A-6: Compound formed by adding 10 moles of ethylene oxide to 1 mole of coconut oil fatty acid A-7: Ester compound of 1 mol of a compound obtained by polymerizing 14 mol of ethylene glycol and 2 mol of oleic acid A-8: Compound obtained by adding 10 moles of ethylene oxide to 1 mole of oleic acid A-9: Compound obtained by adding 30 moles of ethylene oxide to 1 mole of oleic acid A-10: ester compound of 1 mol of a compound obtained by polymerizing 9 mol of ethylene glycol and 1 mol of oleic acid (Fatty acids (B1) or oils (B2)) B-1: Butter B-2: Stearic acid B-3: Palmitic Acid B-4: Coconut Oil B-5: Palm Oil B-6: Behenic Acid B-7: Hydrogenated palm oil B-8: Hydrogenated castor oil B-9: Castor Oil B-10: Oleic Acid B-11: Lard B-12: Lauric Acid B-13: Coconut Oil Fatty Acid (Antioxidant (C)) C-1: 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione as a phenolic antioxidant C-2: Pentaerythritol = tetrakis[3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate] as a phenolic antioxidant C-3: 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane as a phosphorus-based antioxidant C-4: Ditridecyl-1-yl=3,3′-sulfanediyl dipropionate as a thioether antioxidant C-5: 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl=bis[3-(dodecylthio)propionate] as a thioether antioxidant (Lubricant (D)) D-1: Stearyl Stearate D-2: Mineral oil (viscosity 500 seconds) D-3: Dimethicone D-4: Mineral oil (viscosity 180 seconds) D-5: Amino silicone D-6: Paraffin D-7: Mineral oil (viscosity 60 seconds) D-8: Glyceryl Monooleate D-9: Mineral oil (viscosity 80 seconds) D-10: Sorbitan tristearate D-11: Sorbitan monostearate (Anionic surfactant (E)) E-1: Potassium lauryl phosphate E-2: Dioctyl sulfosuccinate sodium salt E-3: Tetradecanesulfonic acid sodium salt E-4: Sodium Oleate E-5: Sodium tallow sulfate E-6: Potassium Stearate (Other ingredients) F-1: Compound obtained by adding 5 mol of ethylene oxide to 1 mol of stearyl alcohol F-2: Compound formed by random addition of 6 moles of ethylene oxide and 2 moles of propylene oxide to 1 mole of C12-13 alcohol F-3: A compound obtained by adding 5 mol of ethylene oxide and then adding 5 mol of propylene oxide to 1 mol of isodecyl alcohol F-4: A compound obtained by adding 2 moles of propylene oxide to 1 mole of isodecyl alcohol and then adding 5 moles of ethylene oxide F-5: A compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitol and then adding 1 mole of stearic acid F-6: A compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitol and then adding 3 moles of stearic acid F-7: Compound obtained by polymerizing 8 mol of propylene glycol F-8: Compound obtained by polymerizing 45 mol of ethylene glycol Test Group 2 <Adhesion of Treatment Agents to Viscose Rayon Fibers> The 10% aqueous solution of each treatment agent prepared in test group 1 was further diluted with water to prepare a 0.2% aqueous emulsion (mass %). The aqueous emulsion of each example was sprayed with oil so that the adhesion amount (excluding the solvent) was 0.2% by mass. -4 The viscose rayon fibers were g / m (1.2 denier) and 38 mm in fiber length. They were dried in a hot air dryer at 80°C for 2 hours and then moistened overnight in an atmosphere of 25°C x 40% RH to obtain viscose rayon fibers to which a treatment agent was attached.

[0065] Test Group 3 <Evaluation of Treatment Agents> (Evaluation Test) Using the viscose rayon fiber with the treatment agent attached, each test of the shedding foaming test, fiber odor test, fiber discoloration test, carding machine passability test, and emulsion stability test was carried out. The process of each test is as follows. In addition, the test results are shown in Table 2.

[0066] (Shedding and blistering test) First, 20 g of viscose rayon fiber with a treatment agent attached was put into 150 g of water, and the viscose rayon fiber was taken out after 15 minutes, and squeezed using a manual juicer. 10 g of the squeezed liquid was loaded into a 25 ml stoppered graduated cylinder and strongly vibrated for 30 seconds. After standing for 30 seconds, strongly vibrated again for 30 seconds. After standing for 5 minutes, the height from the water surface to the upper surface of the foam was measured. The results are shown in the "falling foamability test" column of Table 2.

[0067] Evaluation criteria for the peeling and blistering test ◎ (Good): The height from the water surface to the upper surface of the foam is less than 1 mm ○ (Pass): The height from the water surface to the top surface of the foam is 1 mm or more and less than 2 mm × (failed): The height from the water surface to the upper surface of the foam is more than 2 mm (Fiber odor test) 20 g of the viscose rayon fiber to which the treatment agent was attached was put into 150 g of water and sealed for 30 minutes, and then 10 testers confirmed the odor. The results are shown in the "odor test" column of Table 2.

[0068] Evaluation criteria for fiber odor test ◎◎(Excellent): No judges had any odor ◎(Good): 1-2 people judged that there was a peculiar smell ○ (Pass): 3 to 5 people judged that there was an odor × (unqualified): 6 or more people judged it to have a foreign smell (Fiber discoloration test) Ten testers evaluated whether the viscose rayon fibers to which the treatment agent was attached had discoloration such as yellowing compared to before the treatment agent was attached. The results are shown in the column "Fiber discoloration test" in Table 2.

[0069] Evaluation criteria for fiber discoloration tests ◎◎(Excellent): No judges with discoloration ◎(Good): 1-2 people judged that there was discoloration ○ (Pass): 3 to 5 people judged that there was discoloration × (unqualified): 6 or more people judged that there was discoloration (Evaluation of carding machine passability) 20 g of viscose rayon fiber with the treatment agent attached was humidified in a constant temperature room at 20°C and 65% RH for 24 hours and then supplied to a small carding machine. The ratio of the discharge amount to the input amount was calculated and evaluated according to the following evaluation criteria. The results are shown in the "Card passing test" column of Table 2.

[0070] Evaluation criteria for carding machine passability ◎ (Good): The discharge rate is 90% or more ○ (Qualified): The discharge volume is 80% or more and less than 90% × (unqualified): discharge volume is less than 80% (Evaluation of emulsion stability) 100 g of the 10% aqueous solution of each treatment agent prepared in Test Group 1 was added to a 100 ml carrot-shaped precipitation bottle and allowed to stand at 25°C. After 24 hours, the amount of precipitation was confirmed and evaluated according to the following evaluation criteria. The results are shown in the "Emulsion Stability Test" column of Table 2.

[0071] Evaluation criteria for emulsion stability ◎ (Good): The amount of precipitation is less than 0.1 ml ○ (Qualified): The amount of sediment is greater than 0.1 ml and less than 0.5 ml × (unqualified): the amount of sediment is greater than 0.5ml

[0072] [Table 2]

[0073] As can be seen from the results in Table 2, the treatment agent of the present invention has the effect of improving the effect of reducing the shedding and blistering, and also has the effect of reducing the odor of the fiber to which the treatment agent is attached.

[0074] The present disclosure also includes the following aspects. (Note 1) A treatment agent for viscose rayon, characterized in that it contains the following fatty acid derivatives, at least one selected from the following fatty acids and oils and fats, and an antioxidant.

[0075] Fatty acid derivative: at least one selected from a compound obtained by adding ethylene oxide in a ratio of 1 mol to 30 mol relative to 1 mol of a fatty acid having 12 to 24 carbon atoms, and an ester compound of a compound obtained by polymerizing 4 mol to 50 mol of ethylene glycol to 1 mol and 1 mol to 2 mol of a fatty acid having 12 to 24 carbon atoms.

[0076] Fatty acid: a fatty acid having 12 or more and 24 or less carbon atoms. Oil: at least one selected from vegetable oil, animal oil and hydrogenated oil thereof. (Note 2) The processing agent for viscose rayon according to Supplementary Note 1, wherein When the total content ratio of the fatty acid derivative, at least one selected from the fatty acid and the oil, and the antioxidant is 100 parts by mass, The fatty acid derivative is contained in a ratio of 80 parts by mass to 99.89 parts by mass, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass to 10 parts by mass, and the antioxidant is contained in a ratio of 0.1 parts by mass to 10 parts by mass.

[0077] (Note 3) The processing agent for viscose rayon according to Supplementary Note 1, further comprising at least one selected from the following lubricant and anionic surfactant.

[0078] Lubricant: at least one selected from hydrocarbon compounds, ester compounds (excluding the above-mentioned oils and fats and the above-mentioned fatty acid derivatives), and silicone. (Note 4) The processing agent for viscose rayon according to Supplementary Note 3, wherein The treatment agent comprises the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, and the lubricant. When the total content ratio of the fatty acid derivative, the at least one selected from the fatty acid and the oil, the antioxidant, and the lubricant is 100 parts by mass, The fatty acid derivative is contained in a ratio of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, and the lubricant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less.

[0079] (Note 5) The processing agent for viscose rayon according to Supplementary Note 3, wherein The treatment agent comprises the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, and the anionic surfactant. When the total content ratio of the fatty acid derivative, the at least one selected from the fatty acid and the oil, the antioxidant, and the anionic surfactant is 100 parts by mass, The fatty acid derivative is contained in a ratio of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, and the anionic surfactant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less.

[0080] (Note 6) The processing agent for viscose rayon according to Supplementary Note 3, wherein The treatment agent comprises the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, the lubricant, and the anionic surfactant. When the total content ratio of the fatty acid derivative, the at least one selected from the fatty acid and the oil, the antioxidant, the lubricant, and the anionic surfactant is 100 parts by mass, The fatty acid derivative is contained in a ratio of 40 parts by mass or more and 97.89 parts by mass or less, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, the lubricant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less, and the anionic surfactant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less.

[0081] (Note 7) The processing agent for viscose rayon according to any one of Appendixes 1 to 6, wherein the viscose rayon is viscose rayon staple fibers.

[0082] (Note 8) A viscose rayon characterized in that the viscose rayon treating agent according to any one of Supplementary Notes 1 to 6 is adhered thereto.

[0083] (Note 9) A viscose rayon staple fiber characterized by having attached thereto the viscose rayon treating agent according to any one of Supplementary Notes 1 to 6.

[0084] (Note 10) A method for producing a spunlace nonwoven fabric, characterized in that it comprises the following steps 1 to 2. Step 1: A step of carding the viscose rayon staple fibers described in Supplementary Note 9 to produce a carded web.

[0085] Step 2: A step of entangle the carded web obtained in the above step 1 with water flow.

Claims

1. A treatment agent for viscose rayon, characterized in that: It contains the following fatty acid derivatives, at least one selected from the following fatty acids and oils, and an antioxidant, The content of the antioxidant in the viscose rayon treatment agent is 0.1 mass % or more and 10 mass % or less, Fatty acid derivatives: at least one selected from the group consisting of a compound obtained by adding ethylene oxide in a ratio of 1 mol to 30 mol to 1 mol of a fatty acid having 12 to 24 carbon atoms, and an ester compound obtained by polymerizing 4 mol to 50 mol of ethylene glycol to 1 mol and 1 mol to 2 mol of a fatty acid having 12 to 24 carbon atoms, Fatty acids: fatty acids with 12 or more and 24 or less carbon atoms, Oil: at least one selected from vegetable oil, animal oil and hydrogenated oil thereof.

2. The processing agent for viscose rayon according to claim 1, wherein When the total content ratio of the fatty acid derivative, the at least one selected from the fatty acid and the oil, and the antioxidant is 100 parts by mass, The fatty acid derivative is contained in a ratio of 80 parts by mass to 99.89 parts by mass, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass to 10 parts by mass, and the antioxidant is contained in a ratio of 0.1 parts by mass to 10 parts by mass.

3. The viscose rayon treating agent according to claim 1, further comprising at least one selected from the group consisting of the following lubricants and anionic surfactants, Lubricant: at least one selected from the group consisting of hydrocarbon compounds, ester compounds, and silicones, wherein the ester compounds do not include the oil and fat and the fatty acid derivative.

4. The processing agent for viscose rayon according to claim 3, wherein The treatment agent comprises the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, and the lubricant. When the total content ratio of the fatty acid derivative, the at least one selected from the fatty acid and the oil, the antioxidant, and the lubricant is 100 parts by mass, The fatty acid derivative is contained in a ratio of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, and the lubricant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less.

5. The processing agent for viscose rayon according to claim 3, wherein The treatment agent comprises the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, and the anionic surfactant. When the total content ratio of the fatty acid derivative, the at least one selected from the fatty acid and the oil, the antioxidant, and the anionic surfactant is set to 100 parts by mass, The fatty acid derivative is contained in a ratio of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, and the anionic surfactant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less.

6. The processing agent for viscose rayon according to claim 3, wherein The treatment agent comprises the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, the lubricant, and the anionic surfactant. When the total content ratio of the fatty acid derivative, at least one selected from the fatty acid and the oil, the antioxidant, the lubricant, and the anionic surfactant is set to 100 parts by mass, The fatty acid derivative is contained in a ratio of 40 parts by mass or more and 97.89 parts by mass or less, at least one selected from the fatty acid and the oil is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less, the lubricant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less, and the anionic surfactant is contained in a ratio of 1 part by mass or more and 20 parts by mass or less.

7. The processing agent for viscose rayon according to any one of claims 1 to 6, wherein Viscose rayon is viscose rayon staple fiber.

8. A viscose rayon, characterized in that: The viscose rayon treating agent according to any one of claims 1 to 6 is adhered thereto.

9. A viscose rayon staple fiber, characterized in that: The viscose rayon treating agent according to any one of claims 1 to 6 is adhered thereto.

10. A method for producing a spunlace nonwoven fabric, characterized in that: It includes the following steps 1 to 2: Step 1: a step of carding the viscose rayon staple fibers according to claim 9 to produce a carded web, Step 2: A step of entangle the carded web obtained in the step 1 with water flow.

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