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

Abstract

To provide a viscose rayon treatment agent or the like capable of improving the effect of reducing the occurrence of off-odor and reducing the occurrence of off-foam. The viscose rayon treatment agent contains a fatty acid derivative, at least one selected from a fatty acid and an oil or fat, 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. The fatty acid derivative is at least one selected from a compound in which 1 mole or more and 30 moles or less of ethylene oxide are added to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, and an ester compound in which 1 mole or more and 2 moles or less of a fatty acid having 12 or more and 24 or less carbon atoms are esterified with 1 mole of a compound in which 4 moles or more and 50 moles or less of ethylene glycol are polymerized. The fatty acid is a fatty acid having 12 or more and 24 or less carbon atoms. The oil or fat is at least one selected from a vegetable oil, an animal oil, and a hydrogenated oil thereof.

Description

Technical Field

[0001] This invention relates to a treatment agent for viscose rayon, viscose rayon coated with the treatment agent, viscose rayon staple fibers, and a method for manufacturing spunlace nonwoven fabric. Background Technology

[0002] As raw materials for nonwoven fabrics, known fibers include natural fibers such as cotton fibers, regenerated fibers such as rayon, and synthetic resins such as polyolefins. Among them, viscose rayon, a regenerated fiber made from pulp, cotton linters, etc., has attracted attention due to its excellent biodegradability, moisture absorption, and water absorption.

[0003] In the manufacture of nonwoven fabrics, in order to impart various properties such as lubricity and bundling, a treatment agent containing surfactants or the like is sometimes applied to the surface of the raw material fibers. Patent Document 1 discloses a spunlace fiber treatment agent that is applied to raw material fibers such as viscose rayon during the manufacture of spunlace nonwoven fabrics. This spunlace fiber treatment agent contains a polyoxyethylene derivative and a functional imparting agent.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent No. 6132966 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, the existing spunlace fiber treatment agent has the problem of not adequately reducing bubbling (i.e., suppressing the situation where water used in the water flow interlocking process of nonwoven fabric manufacturing is prone to foaming due to the mixing of the treatment agent detached from the raw material fibers) and reducing the odor of the raw material fibers with the spunlace fiber treatment agent attached.

[0009] Methods for solving problems

[0010] In order to solve the above-mentioned problems, the inventors conducted research and found that a treatment agent for viscose rayon containing three specific components is just right.

[0011] This document describes various methods for using treatment agents to solve the aforementioned problems in viscose rayon.

[0012] The key feature of the viscose rayon treatment agent of Method 1 is that it contains at least one of the following fatty acid derivatives, fatty acids and oils selected from the following fatty acids and oils, and an antioxidant. The fatty acid derivative is selected from at least one of the following compounds formed by adding ethylene oxide to 1 mole of fatty acids having 12 to 24 carbon atoms in a ratio of 1 mole to 30 moles, and ester compounds formed by polymerizing 4 to 50 moles of ethylene glycol to 1 mole and fatty acids having 1 to 2 moles of fatty acids having 12 to 24 carbon atoms. The fatty acid is a fatty acid with 12 to 24 carbon atoms. The oil is selected from at least one of vegetable oils, animal oils, and their hydrogenated oils.

[0013] Regarding the viscose rayon treatment agent of method 2, in the viscose rayon treatment agent of method 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 may be contained in a ratio of 80 parts by mass or more and 99.89 parts by mass or less, at least one selected from the above-mentioned fatty acid and the above-mentioned oil and fat may be contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, and the above-mentioned antioxidant may be contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less.

[0014] Regarding the viscose rayon treatment agent of method 3, the viscose rayon treatment agent of method 1 may further contain at least one selected from the following lubricants and anionic surfactants. The lubricant is selected from at least one of hydrocarbon compounds, ester compounds (excluding the above-mentioned oils and fatty acid derivatives), and silicones.

[0015] Regarding the viscose rayon treatment agent of method 4, the viscose rayon treatment agent of method 3 contains the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acid and the aforementioned oil, the aforementioned antioxidant, and the aforementioned lubricant. When the total content ratio of the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acid and the aforementioned oil, the aforementioned antioxidant, and the aforementioned lubricant is set to 100 parts by mass, the aforementioned fatty acid derivative may be contained in a ratio of 60 parts by mass to 98.89 parts by mass, at least one selected from the aforementioned fatty acid and the aforementioned oil may be contained in a ratio of 0.01 parts by mass to 10 parts by mass, the aforementioned antioxidant may be contained in a ratio of 0.1 parts by mass to 10 parts by mass, and the aforementioned lubricant may be contained in a ratio of 1 part by mass to 20 parts by mass.

[0016] Regarding the viscose rayon treatment agent of method 5, the viscose rayon treatment agent of method 3 contains the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acid and the aforementioned oil, the aforementioned antioxidant, and the aforementioned anionic surfactant. When the total content ratio of the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acid and the aforementioned oil, the aforementioned antioxidant, and the aforementioned anionic surfactant is set to 100 parts by mass, the aforementioned fatty acid derivative may be contained in a ratio of 60 parts by mass to 98.89 parts by mass, at least one selected from the aforementioned fatty acid and the aforementioned oil may be contained in a ratio of 0.01 parts by mass to 10 parts by mass, the aforementioned antioxidant may be contained in a ratio of 0.1 parts by mass to 10 parts by mass, and the aforementioned anionic surfactant may be contained in a ratio of 1 part by mass to 20 parts by mass.

[0017] Regarding the viscose rayon treatment agent of Method 6, the viscose rayon treatment agent of Method 3 contains the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acid and the aforementioned oils, the aforementioned antioxidant, the aforementioned lubricant, and the aforementioned anionic surfactant. When the total content ratio of the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acid and the aforementioned oils, the aforementioned antioxidant, the aforementioned lubricant, and the aforementioned anionic surfactant is set to 100 parts by mass, the aforementioned fatty acid derivative may be contained in a ratio of 40 parts by mass to 97.89 parts by mass, at least one selected from the aforementioned fatty acid and the aforementioned oils may be contained in a ratio of 0.01 parts by mass to 10 parts by mass, the aforementioned antioxidant may be contained in a ratio of 0.1 parts by mass to 10 parts by mass, the aforementioned lubricant may be contained in a ratio of 1 part by mass to 20 parts by mass, and the aforementioned anionic surfactant may be contained in a ratio of 1 part by mass to 20 parts by mass.

[0018] Regarding the viscose rayon treatment agent of method 7, in the viscose rayon treatment agent described in any of methods 1 to 6, the viscose rayon can be viscose rayon short fibers.

[0019] This document describes various methods for solving the aforementioned problems with viscose rayon.

[0020] The key feature of viscose rayon of method 8 is that it is coated with a viscose rayon treatment agent as described in any of methods 1 to 7.

[0021] The key feature of viscose rayon staple fiber of method 9 is that it is coated with the viscose rayon treatment agent described in any of methods 1 to 7.

[0022] This describes a method for manufacturing spunlace nonwoven fabrics that solves the aforementioned problems.

[0023] The key point of the manufacturing method of spunlace nonwoven fabric of method 10 is that it includes the following steps 1 and 2. Step 1 is the process of carding the viscose rayon short fibers of method 9 to produce a carding web. Step 2 is the process of using water flow to interweave the carding web obtained in step 1.

[0024] Invention Effects

[0025] According to the present invention, the effect of reducing shedding and bubbling can be improved, and the odor generated by viscose rayon can be reduced. Detailed Implementation

[0026] (First Embodiment)

[0027] The following describes a first embodiment of the viscose rayon treatment agent (hereinafter referred to as the "treatment agent") of the present invention. The treatment agent contains a fatty acid derivative, at least one selected from the following fatty acids and oils, and an antioxidant. The fatty acid derivative is at least one selected from compounds formed by adding ethylene oxide to fatty acids having 12 or more and 24 carbon atoms in a ratio of 1 mole to 30 moles, and ester compounds formed by polymerizing 4 or more and 50 moles of ethylene glycol in a ratio of 1 mole to 2 moles of fatty acids having 12 or more and 24 carbon atoms. The fatty acid is a fatty acid having 12 or more and 24 carbon atoms. The oil is at least one selected from vegetable oils, animal oils, and their hydrogenated oils. The treatment agent may further contain a lubricant and / or anionic surfactant as needed.

[0028] <About fatty acid derivatives (A)>

[0029] The fatty acid derivative (A) in the processing agent provided in this embodiment is at least one of the following: a compound formed by adding ethylene oxide to a fatty acid having 12 or more and 24 or less carbon atoms in a ratio of 1 mole or more and 30 moles or less; a compound formed by polymerizing ethylene glycol in a ratio of 4 moles or more and 50 moles or less; and an ester compound of a fatty acid having 12 or more and 2 moles or less carbon atoms.

[0030] The fatty acid used as a raw material for constituting fatty acid derivative (A) can be any known substance, and can be either a saturated fatty acid or an unsaturated fatty acid. Furthermore, it can be a straight-chain fatty acid or a fatty acid with a branched chain structure. The number of carbon atoms in the fatty acid is 12 or more and 24 or less, preferably 12 or more and 22 or less. Ranges formed by any combination of the above upper and lower limits are also conceivable.

[0031] The molar addition of ethylene oxide is 1 mole or more and 30 moles or less, preferably 2 moles or more and 25 moles or less. Any combination of the above upper and lower limits is also conceivable. It should be noted that the molar addition of ethylene oxide represents the number of moles of ethylene oxide relative to 1 mole of fatty acid used as a starting material.

[0032] Specific examples of the aforementioned fatty acid derivative (A) include: (1) a compound formed by adding 20 moles of ethylene oxide to 1 mole of oleic acid, a compound formed by adding 10 moles of ethylene oxide to 1 mole of oleic acid, a compound formed by adding 30 moles of ethylene oxide to 1 mole of oleic acid, a compound formed by adding 5 moles of ethylene oxide to 1 mole of stearic acid, a compound formed by adding 10 moles of ethylene oxide to 1 mole of stearic acid, a compound formed by adding 10 moles of ethylene oxide to 1 mole of lauric acid, etc., obtained by adding ethylene oxide to saturated or unsaturated fatty acids; (2) an ester compound formed by polymerizing 9 moles of ethylene glycol with 1 mole of oleic acid, and a compound formed by polymerizing 14 moles of ethylene glycol. (2) Polyethylene glycol alkyl (or alkylene) esters obtained by adding polyethylene glycol to saturated or unsaturated fatty acids, such as compounds with 2 moles of oleic acid esters, compounds with 1 mole of ethylene glycol polymerized to 23 moles of stearic acid esters, compounds with 1 mole of ethylene glycol polymerized to 9 moles of stearic acid esters, compounds with 2 moles of lauric acid esters, compounds with 1 mole of ethylene glycol polymerized to 23 moles of stearic acid esters, etc.; (3) Polyethylene glycol alkyl (or alkylene) esters obtained by adding ethylene oxide to saturated or unsaturated fatty acids, such as compounds with 30 moles of ethylene oxide relative to 1 mole of castor oil, compounds with 10 moles of ethylene oxide relative to 1 mole of hydrogenated castor oil, compounds with 10 moles of ethylene oxide relative to 1 mole of coconut oil fatty acids, etc.; and esters of oil-derived fatty acids of polyoxyethylene obtained by adding ethylene oxide to fatty acids of natural sources.

[0033] In fatty acid derivative (A), one fatty acid derivative can be used alone, or two or more fatty acid derivatives can be used in combination.

[0034] In the treatment agent, the lower limit of the content of fatty acid derivative (A) is preferably 30% by mass or more, more preferably 40% by mass or more. Furthermore, the upper limit of the content of fatty acid derivative (A) is preferably 95% by mass or less, more preferably 92% by mass or less. By specifying this range of content, the effect of the present invention can be further improved. In one embodiment, the content of fatty acid derivative (A) in the treatment agent is, for example, 40% by mass or more, 60% by mass or more, 69% by mass or more, 70% by mass or more, 72% by mass or more, 75% by mass or more, 80% by mass or more, 82% by mass or more, 84% by mass or more, 86% by mass or more, 87% by mass or more, or 90.8% by mass or more. Similarly, the content of fatty acid derivative (A) in the treatment agent may be, 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 any combination of the above upper and lower limits is also conceivable.

[0035] <About fatty acids (B1) and fats (B2)>

[0036] The fatty acid (B1) in the processing agent provided in this embodiment is a fatty acid with 12 or more and 24 or less carbon atoms. Known substances can be appropriately used for the fatty acid with 12 or more and 24 or less carbon atoms. It can be a saturated fatty acid or an unsaturated fatty acid. Furthermore, it can be linear or branched. The fatty acid (B1) has 12 or more and 24 or less carbon atoms, preferably 12 or more and 22 or less. A range formed by any combination of the above upper and lower limits is also conceivable. 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, and coconut oil fatty acids.

[0037] The oil (B2) in the processing agent provided in this embodiment is selected from at least one of vegetable oils, animal oils, and their hydrogenated oils. Specific examples of oil (B2) include castor oil, sesame oil, tall oil, palm oil, palm kernel oil, coconut oil, rapeseed oil, lard, tallow, whale oil, and their hydrogenated oils, such as hydrogenated castor oil and hydrogenated palm oil.

[0038] Regarding fatty acids (B1) and oils (B2), one type of fatty acid and / or oil can be used alone, or two or more types of fatty acids and / or oils can be used in combination.

[0039] In the treatment agent, the lower limit of the content 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 this content range, the effect of reducing flaking and foaming can be further improved. In addition, the upper limit of the content of this component is preferably 15% by mass or less, more preferably 10% by mass or less. By specifying this content range, the emulsification stability of the treatment agent can be further improved. In one embodiment, 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 combined content of fatty acids (B1) and oils (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 is also conceivable.

[0040] <About Antioxidants (C)>

[0041] As the antioxidant (C) in the treatment agent provided in this embodiment, a known substance may be appropriately used. Specific examples of 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), 1,1,3-Tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, pentaerythritol = tetrakis[3-(3′,5′-di-tert-butyl-4′-hydroxyphenyl)propionate] and other phenolic antioxidants; (2) 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(tetrane)-1-yl = 3,3′-thionediyldipropionate and other thioether antioxidants; (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)phosphite, tris(2,3-di-tert-butylphenyl)phosphite, 4,4′-butylidene-bis(3-methyl-6-tert-butylphenyl-bis-tetrazyl)phosphite, 1,1,3-tris(2-methyl-4-di-di-phosphite-tridecyl-5-tert-butylphenyl)butane, tris(2,4-di-tert-butylphenyl)phosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol-diphosphite, tetra(2,4-di- Phosphorus-based 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, tetratriatridecyl-4,4′-butylene-bis(2-tert-butyl-5-methylphenol)diphosphite, triphenyl phosphite, decyl diphenyl phosphite, tridecyl phosphite, trioctyl phosphite, trilauryl phosphite, tri(octadecyl) phosphite, trinonylphenyl phosphite, trithiolated trilauryl phosphite, octyl diphenyl phosphite, etc.; etc.

[0042] Regarding the antioxidant (C), one antioxidant can be used alone, or two or more antioxidants can be used in combination. When using a single antioxidant, a phenolic antioxidant or a thioether antioxidant is preferred. This configuration further enhances the effectiveness of the invention, particularly improving the odor reduction effect on the fibers coated with the treatment agent. When using two or more antioxidants in combination, a combination of a phenolic antioxidant and a thioether antioxidant is preferred. This configuration further enhances the odor reduction effect.

[0043] In the treatment agent of this embodiment, there is no particular limitation on the content ratio of the fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), and antioxidant (C). When the total content ratio of the fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), and antioxidant (C) is set to 100 parts by mass, it is preferable that the fatty acid derivative (A) is contained in a ratio of 80 parts by mass or more and 99.89 parts by mass or less, at least one selected from fatty acids (B1) and oils (B2) is contained in a ratio of 0.01 parts by mass or more and 10 parts by mass or less, and antioxidant (C) is contained in a ratio of 0.1 parts by mass or more and 10 parts by mass or less. With this configuration, the effect of the present invention can be further improved.

[0044] In the treatment agent, the lower limit of the content of antioxidant (C) is preferably 0.1% by mass or more, more preferably 0.15% by mass or more. By specifying this content range, the effect of reducing odor on the fibers with the treatment agent attached can be further improved. In addition, the upper limit of the content of antioxidant (C) is preferably 15% by mass or less, more preferably 10% by mass or less. By specifying this content range, the emulsification stability of the treatment agent can be further improved. In one embodiment, the content of 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. Similarly, the content of 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 the range can also be arbitrarily combined with the above upper and lower limits.

[0045] <About Lubricants (D)>

[0046] The processing agent (D) in this embodiment may further contain at least one lubricant selected from hydrocarbon compounds, ester compounds (excluding the fatty acid derivative (A) and the oil (B2) mentioned above), and silicone. By mixing this lubricant (D), the effectiveness of the present invention can be further improved, especially the passability of the carding machine.

[0047] Specific examples of hydrocarbon compounds include mineral oil and paraffin.

[0048] Specific examples of ester compounds include esters of aliphatic monohydric alcohols and aliphatic monocarboxylic acids, such as butyl stearate and stearyl stearate; esters of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids, such as glyceryl monooleate, glyceryl trioleate, sorbitan monolaurate, sorbitan trilaurate, sorbitan monooleate, sorbitan trioleate, sorbitan monostearate, and sorbitan tristearate. It should be noted that ester compounds used as lubricants refer to compounds obtained by reacting fatty acids with alcohols and do not include the aforementioned fatty acid derivatives (A) and the aforementioned oils (B2).

[0049] Specific examples of silicones include dimethyl silicone, amino silicone, amino-modified silicone, and polyoxyethylene-modified silicone.

[0050] Regarding lubricant (D), one type of lubricant can be used alone, or two or more types of lubricants can be used in combination.

[0051] In this embodiment, the treatment agent contains the aforementioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), an antioxidant (C), and a lubricant (D), and their proportions are not particularly limited. When the total proportion of the aforementioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), the antioxidant (C), and the lubricant (D) is set to 100 parts by mass, it is preferable to contain the fatty acid derivative (A) at a proportion of 60 parts by mass and 98.89 parts by mass or less, at least one selected from fatty acids (B1) and oils (B2) at a proportion of 0.01 parts by mass and 10 parts by mass or less, the antioxidant (C) at a proportion of 0.1 parts by mass and 10 parts by mass or less, and the lubricant (D) at a proportion of 1 part by mass and 20 parts by mass or less. This further improves the effects of the present invention.

[0052] In the treatment agent, the lower limit of the content of lubricant (D) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying this content range, the throughput of the carding machine can be improved in particular. Furthermore, the upper limit of the content of lubricant (D) is preferably 25% by mass or less, more preferably 20% by mass or less. By specifying this content range, the emulsification stability of the treatment agent can be improved. In one embodiment, the content of 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. Similarly, the content of 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 any combination of the above upper and lower limits is also conceivable.

[0053] <About Anionic Surfactants (E)>

[0054] The treatment agent in this embodiment may further contain anionic surfactant (E). By mixing in this anionic surfactant (E), the effects of the present invention can be further improved, especially the emulsification stability when the treatment agent is prepared as an aqueous solution.

[0055] As an anionic surfactant (E), known substances may be appropriately used. Specific examples of anionic surfactants (E) include: (1) phosphate salts of aliphatic alcohols such as lauryl phosphate, cetyl phosphate, octyl phosphate, oleyl phosphate, and stearyl phosphate; and (2) phosphate salts of substances formed by adding at least one epoxide selected from ethylene oxide and propylene oxide to an aliphatic alcohol, such as polyoxyethylene lauryl ether phosphate, polyoxyethylene oleyl ether phosphate, and polyoxyethylene stearyl ether phosphate. Salts; (3) aliphatic 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) sulfates of aliphatic alcohols such as lauryl sulfate, oleyl sulfate, and stearyl sulfate; (5) polyoxyethylene lauryl ether sulfates and polyoxyethylene (polyoxyethylene, polyoxypropylene) sulfonates. (6) Sulfate salts of fatty acids such as castor oil fatty acid sulfate, sesame oil fatty acid sulfate, tall oil fatty acid sulfate, soybean oil fatty acid sulfate, rapeseed oil fatty acid sulfate, palm oil fatty acid sulfate, lard fatty acid sulfate, tallow fatty acid sulfate, whale oil fatty acid sulfate, etc.; (7) Sulfate salts of oils such as castor oil sulfate, sesame oil sulfate, tall oil sulfate, soybean oil sulfate, rapeseed oil sulfate, palm oil sulfate, lard sulfate, tallow sulfate, whale oil sulfate, etc.; (8) Fatty acid salts such as lauryl salt, oleate, stearate, etc.; (9) Sulfonated succinate salts of aliphatic alcohols such as dioctyl sulfonated succinate, etc. Counterions for anionic surfactants include, for example, alkali metal salts such as potassium and sodium salts, ammonium salts, and alkanoylamine salts such as triethanolamine.

[0056] Regarding anionic surfactants (E), one type of anionic surfactant can be used alone, or two or more anionic surfactants can be used in combination.

[0057] In this embodiment, the treatment agent contains the aforementioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), an antioxidant (C), and an anionic surfactant (E), and there are no particular limitations on their proportions. When the total proportion of the aforementioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), the antioxidant (C), and the anionic surfactant (E) is set to 100 parts by mass, it is preferable to contain the fatty acid derivative (A) at a proportion of 60 parts by mass and 98.89 parts by mass or less, at least one selected from fatty acids (B1) and oils (B2) at a proportion of 0.01 parts by mass and 10 parts by mass or less, the antioxidant (C) at a proportion of 0.1 parts by mass and 10 parts by mass or less, and the anionic surfactant (E) at a proportion of 1 part by mass and 20 parts by mass or less. With this configuration, the effects of the present invention can be further improved.

[0058] Furthermore, when the treatment agent of this embodiment contains the aforementioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), an antioxidant (C), a lubricant (D), and an anionic surfactant (E), there is no particular limitation on their proportions. When the total proportion of the aforementioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), the antioxidant (C), the lubricant (D), and the anionic surfactant (E) is set to 100 parts by mass, it is preferable to contain fatty acid derivative (A) at a proportion of 40 parts by mass and 97.89 parts by mass or less, at least one selected from fatty acids (B1) and oils (B2) at a proportion of 0.01 parts by mass and 10 parts by mass or less, antioxidant (C) at a proportion of 0.1 parts by mass and 10 parts by mass or less, lubricant (D) at a proportion of 1 part by mass and 20 parts by mass or less, and anionic surfactant (E) at a proportion of 1 part by mass and 20 parts by mass or less. With this configuration, the effects of the present invention can be further improved.

[0059] In the treatment agent, the lower limit of the content of anionic surfactant (E) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying this content range, the emulsification stability of the treatment agent can be further improved. Furthermore, the upper limit of the content of anionic surfactant (E) is preferably 25% by mass or less, more preferably 20% by mass or less. By specifying this content range, the effect of reducing flaking and foaming can be further improved. In one embodiment, the content of 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. Similarly, the content of 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 any combination of the above upper and lower limits is also conceivable.

[0060] <About other ingredients>

[0061] The processing agent in this embodiment may further contain nonionic surfactants, polyols, etc., as other components, without hindering the effects of the present invention.

[0062] Specific examples of nonionic surfactants include: (1) compounds formed by adding 10 moles of ethylene oxide to 1 mole of lauryl alcohol; compounds formed by adding 5 moles of ethylene oxide to 1 mole of stearyl alcohol; compounds formed by adding 30 moles of ethylene oxide to 1 mole of oleyl alcohol; compounds formed by adding 10 moles of ethylene oxide to 1 mole of C12-13 alcohol; compounds formed by randomly adding 10 moles of ethylene oxide and propylene oxide to 1 mole of lauryl alcohol, respectively; and other compounds. For compounds obtained by random addition of 6 moles of ethylene oxide and 2 moles of propylene oxide to 1 mole of C12-13 alcohol, compounds obtained by adding 5 moles of ethylene oxide to 1 mole of isodecanol and then adding 5 moles of propylene oxide, compounds obtained by adding 2 moles of propylene oxide to 1 mole of isodecanol and then adding 5 moles of ethylene oxide, etc., polyoxyalkylene (or alkenyl) ethers obtained by adding 10 moles of ethylene oxide to 1 mole of isodecanol and then adding 10 moles of propylene oxide; (2) polyoxyalkylene (or alkenyl) ethers obtained by adding 10 moles of ethylene oxide to 1 mole of sorbitol. The following compounds are obtained by adding 1 mole of lauric acid to ethylene oxide, adding 1 mole of oleic acid to 20 moles of ethylene oxide relative to 1 mole of sorbitol, adding 1 mole of stearic acid to 20 moles of ethylene oxide relative to 1 mole of sorbitol, and adding 3 moles of stearic acid to 20 moles of ethylene oxide relative to 1 mole of sorbitol, etc., by reacting ethylene oxide with aliphatic polyols to form polyoxyethylene polyol ethers; (3) adding 10 moles of ethylene oxide to ethylene oxide. Compounds obtained by adding ethane to octylphenol, compounds obtained by adding 10 moles of ethylene oxide to nonylphenol, etc., are polyoxyethylene alkylphenol ethers obtained by adding ethylene oxide to alkylphenol; (4) compounds obtained by adding 5 moles of ethylene oxide to octylamine, compounds obtained by adding 8 moles of ethylene oxide to laurylamine, compounds obtained by adding 20 moles of ethylene oxide to stearylamine, etc., are polyoxyethylene amino ethers obtained by adding ethylene oxide to saturated or unsaturated aliphatic amines. It should be noted that when using two or more ethylene oxides, their addition methods can be any one of block addition, random addition, and a combination of block addition and random addition, without particular limitation.

[0063] Specific examples of polyols include ethylene glycol, propylene glycol, pentanediol, hexanediol, glycerol, pentaerythritol, sorbitol, sorbitan, polyethylene glycol, polypropylene glycol, and the reaction products of propylene glycol and alkyl epoxides.

[0064] These other ingredients can be used alone or in combination of two or more.

[0065] Without impairing the effects of the present invention, 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.

[0066] The viscose rayon to which the treatment agent of this embodiment is applied can be a long fiber, commonly referred to as a filament, or a short fiber, commonly referred to as a diced fiber. Short fibers are preferred. The length of the short fibers in this embodiment is not particularly limited as long as it is equivalent to the length of short fibers in this technical field; for example, it is preferably 100 mm or less, and more preferably 51 mm or less.

[0067] According to the first embodiment, the following effects can be obtained.

[0068] (1) The treatment agent of this embodiment includes the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and oils (B2), and an antioxidant (C). Therefore, it is possible to improve the effect of suppressing the foaming of water used in the water-flow bonding process when the treatment agent is adhering to the viscose rayon, due to the mixing of the treatment agent detached from the viscose rayon. (That is, it is possible to improve the effect of reducing detachment foaming). As a result, the operating efficiency can be improved in the spunlace nonwoven fabric manufacturing process. In addition, the generation of odor from the viscose rayon with the treatment agent adhering to it can be reduced. In addition, the discoloration of the viscose rayon with the treatment agent adhering to it can be reduced. In addition, the carding machine passability when the viscose rayon with the treatment agent adhering to it is passed through the carding machine can be improved. In addition, the emulsion stability when the treatment agent is prepared into an aqueous solution can be improved.

[0069] (Second Implementation)

[0070] Next, a second embodiment embodying the viscose rayon of the present invention will be described. The viscose rayon of this embodiment is coated with the treatment agent of the first embodiment.

[0071] As for the method of applying the treatment agent, known methods can be used, such as impregnation, spraying, rinsing, rolling, and drip-flow methods. Furthermore, there are no particular limitations on the process in which the treatment agent is applied; examples include processes following the refining process and spinning processes.

[0072] The viscose rayon treated with the treatment agent of this embodiment can be used with the viscose rayon described above.

[0073] Examples of treatment agents that can be applied to viscose rayon include aqueous solutions and organic solvent solutions. Regarding the treatment method for viscose rayon, it is preferable to dilute the treatment agent of the first embodiment with water to prepare an aqueous solution with a concentration of 0.5 to 20% by mass, and then apply this aqueous solution to the viscose rayon. Regarding the amount of treatment agent applied, it is preferable to apply it in a ratio of 0.1 to 1% by mass of the solid component (excluding solvent) relative to the viscose rayon.

[0074] (Third Implementation)

[0075] A third embodiment, which embodies the method for manufacturing the spunlace nonwoven fabric of the present invention, will be described.

[0076] Spunlace nonwoven fabric is manufactured by sequentially going through a carding web forming process (process 1) of combing viscose rayon to create a carding web, and a water flow interlacing process (process 2) of using water flow to interlac the carding web.

[0077] (The process of forming a carding web)

[0078] The carding web forming process involves combing the viscose rayon coated with the aforementioned treatment agent to create a carding web. This combing can be performed using known carding machines, such as flatbed carding machines, combination carding machines, and roller carding machines.

[0079] (Water flow exchange process)

[0080] The water-jet interlocking process is a process that uses water to interlock the fibers in the carding web formed during the carding web formation process. High-pressure water jets are sprayed onto the carding web, causing the fibers to intertwine and form sheets through the pressure of the water. After the water-jet interlocking process, drying and winding processes can be performed as appropriate.

[0081] According to the second and third embodiments, in addition to the effects described in (1) above, the following effects can also be obtained.

[0082] (2) Since it can improve the reduction of bubbling and shedding, it can make the water used in the water flow interlocking process to perform water flow interlocking. Therefore, proper water flow interlocking can improve the texture of the spunlace nonwoven fabric.

[0083] The first to third embodiments can be implemented with the following modifications. The first to third embodiments and the following modifications can be combined with each other within the scope of technical non-contradiction.

[0084] In the treatment agents described in the above embodiments, without impairing the effects of the present invention, surfactants, antistatic agents, binders, ultraviolet absorbers, pH adjusters, and other ingredients commonly used in treatment agents, other than those described above, may be further mixed in as other ingredients to maintain the quality of the treatment agent.

[0085] Example

[0086] The following embodiments are provided to illustrate the structure and effects of the present invention in more detail. The present invention is not limited to these embodiments.

[0087] Experimental Group 1 <Preparation of Treatment Agent>

[0088] (Example 1)

[0089] The following materials are used as raw materials for the treatment agent. It should be noted that the values ​​of each component shown in Table 1 represent the content in the treatment agent.

[0090] Fatty acid derivative (A): A compound formed by the addition of 20 moles of ethylene oxide to 1 mole of oleic acid.

[0091] Fatty acid (B): Stearic acid

[0092] 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 di(tridecane)-1-yl=3,3′-thionediyldipropionate as a thioether antioxidant.

[0093] Lubricant (D): Stearate stearate

[0094] Anionic surfactant (E): Potassium lauryl phosphate

[0095] Add 900 parts of water to 100 parts of the treatment agent prepared according to the proportions shown in Table 1, and stir at 50°C to prepare a 10% aqueous solution containing 10% by mass of the treatment agent.

[0096] (Examples 2-24 and Comparative Examples 1-8)

[0097] The treatment agents of Examples 2-24 and Comparative Examples 1-8 were prepared in the same manner as the treatment agent of Example 1 and its aqueous solution, and 10% aqueous solutions of them were prepared.

[0098] The contents of the treatment agents prepared in the above examples are summarized in Table 1. The treatment agents of Examples 3-4, 6, 8, 24 and Comparative Examples 1-2, 6 contain nonionic surfactants and / or polyols as other components. In Example 24 of Table 1, the content (parts by mass (*)) of other components is expressed as parts by mass relative to a total of 100 parts by mass of components (A) to (E).

[0099] The types and contents of fatty acid derivatives (A), fatty acids (B1) or oils (B2), antioxidants (C), lubricants (D), anionic surfactants (E), and other components are listed in the columns “Fatty Acid Derivatives (A)”, “Fatty Acids and Oils (B)”, “Antioxidants (C)”, “Lubricants (D)”, “Anionic Surfactants (E)”, and “Other Components” in Table 1.

[0100] [Table 1]

[0101]

[0102] The details of the fatty acid derivatives (A), fatty acids (B1) or oils (B2), antioxidants (C), lubricants (D), anionic surfactants (E), and other components listed in Table 1 are as follows.

[0103] (Fatty acid derivative (A))

[0104] A-1: A compound formed by adding 20 moles of ethylene oxide to 1 mole of oleic acid.

[0105] A-2: A compound formed by adding 5 moles of ethylene oxide to 1 mole of stearic acid.

[0106] A-3: A compound formed by adding 10 moles of ethylene oxide to 1 mole of stearic acid.

[0107] A-4: 1 mole of a compound formed by polymerizing 9 moles of ethylene glycol and 2 moles of an ester compound of lauric acid.

[0108] A-5: 1 mole of a compound formed by polymerizing 23 moles of ethylene glycol and 2 moles of an ester compound of stearic acid.

[0109] A-6: A compound formed by adding 10 moles of ethylene oxide to 1 mole of coconut oil fatty acids.

[0110] A-7: 1 mole of a compound formed by polymerizing 14 moles of ethylene glycol and 2 moles of an ester compound of oleic acid.

[0111] A-8: A compound formed by adding 10 moles of ethylene oxide to 1 mole of oleic acid.

[0112] A-9: A compound formed by adding 30 moles of ethylene oxide to 1 mole of oleic acid.

[0113] A-10: 1 mole of a compound formed by polymerizing 9 moles of ethylene glycol and 1 mole of an ester compound of oleic acid.

[0114] (Fatty acids (B1) or fats (B2))

[0115] B-1: Butter

[0116] B-2: Stearic acid

[0117] B-3: Palmitic acid

[0118] B-4: Coconut oil

[0119] B-5: Palm Oil

[0120] B-6: Behenic acid

[0121] B-7: Hydrogenated Palm Oil

[0122] B-8: Hydrogenated castor oil

[0123] B-9: Castor oil

[0124] B-10: Oleic acid

[0125] B-11: Lard

[0126] B-12: Lauric acid

[0127] B-13: Fatty acids in coconut oil

[0128] (Antioxidant (C))

[0129] 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, a phenolic antioxidant.

[0130] C-2: Pentaerythritol as a phenolic antioxidant = tetrakis[3-(3',5'-di-tert-butyl-4'-hydroxyphenyl)propionate]

[0131] 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

[0132] C-4: Di(tridecane)-1-yl=3,3′-thionediyldipropionate as a thioether antioxidant

[0133] C-5: 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl=bis[3-(dodecylthio)propionate] as a thioether-based antioxidant

[0134] (Lubricant (D))

[0135] D-1: Stearyl stearate

[0136] D-2: Mineral oil (viscosity 500 seconds)

[0137] D-3: Dimethylsilicone

[0138] D-4: Mineral oil (viscosity 180 seconds)

[0139] D-5: Aminosilicone

[0140] D-6: Paraffin

[0141] D-7: Mineral oil (viscosity 60 seconds)

[0142] D-8: Glyceryl monooleate

[0143] D-9: Mineral oil (viscosity 80 seconds)

[0144] D-10: Sorbitan Tristearate

[0145] D-11: Sorbitan monostearate

[0146] (Anionic surfactant (E))

[0147] E-1: Potassium lauryl phosphate

[0148] E-2: Sodium dioctylsulfosuccinate

[0149] E-3: Sodium tetradecanesulfonate

[0150] E-4: Sodium oleate

[0151] E-5: Sodium tallow sulfate

[0152] E-6: Potassium stearate

[0153] (Other ingredients)

[0154] F-1: A compound formed by adding 5 moles of ethylene oxide to 1 mole of stearyl alcohol.

[0155] F-2: A compound formed by the random addition of 1 mole of C12-13 alcohol to 6 moles of ethylene oxide and 2 moles of propylene oxide.

[0156] F-3: A compound formed by adding 5 moles of ethylene oxide to 1 mole of isodecanol, followed by adding 5 moles of propylene oxide.

[0157] F-4: A compound formed by adding 2 moles of propylene oxide to 1 mole of isodecanol, followed by adding 5 moles of ethylene oxide.

[0158] F-5: A compound formed by adding 20 moles of ethylene oxide to 1 mole of sorbitol, followed by the addition of 1 mole of stearic acid.

[0159] F-6: A compound formed by adding 20 moles of ethylene oxide to 1 mole of sorbitol, followed by the addition of 3 moles of stearic acid.

[0160] F-7: A compound formed by polymerizing 8 moles of propylene glycol.

[0161] F-8: A compound formed by polymerizing 45 moles of ethylene glycol.

[0162] Experimental Group 2 <Adhesion of Treatment Agent to Viscose Rayon Fibers>

[0163] The 10% aqueous solutions of each treatment agent prepared in test group 1 were further diluted with water to prepare 0.2% aqueous emulsions (mass %). The aqueous emulsions of each example were applied by spraying to a fineness of 1.3 × 10⁻⁶ cells at an adhesion amount (excluding solvent) of 0.2% by mass. -4 Viscose rayon fibers with a density of g / m (1.2 denier) and a fiber length of 38 mm were dried in a hot air dryer at 80°C for 2 hours, and then moistened overnight at 25°C and 40% RH to obtain viscose rayon fibers with a treatment agent.

[0164] Experimental Group 3 <Evaluation of the Treatment Agent>

[0165] (Evaluation Test)

[0166] Viscose rayon fibers coated with a treatment agent were subjected to various tests, including shedding and bubbling tests, fiber odor tests, fiber discoloration tests, carding machine passability tests, and emulsion stability tests. The procedures for each test are shown below. The results of each test are presented in Table 2.

[0167] (Shedding and foaming test)

[0168] First, 20g of viscose rayon fiber coated with the treatment agent was placed in 150g of water. After 15 minutes, the viscose rayon fiber was removed and squeezed using a manual juicer. 10g of the squeezed liquid was placed into a 25ml stoppered graduated cylinder and vibrated vigorously for 30 seconds. After standing for 30 seconds, it was vibrated vigorously again for 30 seconds. After standing for 5 minutes, the height from the water surface to the top surface of the foam was measured. The results are shown in the "Shedding and Foaming Test" column of Table 2.

[0169] Evaluation criteria for the shedding and foaming test

[0170] ◎(Good): The height from the water surface to the top surface of the foam is less than 1mm.

[0171] ○ (Pass): The height from the water surface to the top surface of the foam is more than 1 mm and less than 2 mm.

[0172] × (Unacceptable): The height from the water surface to the top surface of the foam is more than 2mm.

[0173] (Fiber odor test)

[0174] 20g of viscose rayon fibers coated with the treatment agent were immersed in 150g of water and sealed for 30 minutes. Ten testers then confirmed the odor. The results are shown in the "Odor Test" column of Table 2.

[0175] Evaluation criteria for fiber odor test

[0176] ◎◎(Excellent): No judges with unusual odors were found.

[0177] ◎(Good): 1-2 people judged it to have an odor

[0178] ○ (Pass): 3-5 people are deemed to have an odor

[0179] × (Unacceptable): 6 or more people are considered to have an unpleasant odor.

[0180] (Fiber discoloration test)

[0181] For viscose rayon fibers coated with the treatment agent, 10 testers determined whether yellowing or other discoloration occurred compared to before the treatment agent was applied. The results are shown in the "Fiber Discoloration Test" column of Table 2.

[0182] Evaluation criteria for fiber discoloration test

[0183] ◎◎(Excellent): No judges with color changes exist.

[0184] ◎(Good): 1-2 people judged it as having changed color

[0185] ○ (Pass): 3-5 people are judged to have changed color

[0186] × (Unacceptable): 6 or more people are deemed to have discolored.

[0187] (Evaluation of the passability of the carding machine)

[0188] 20g of viscose rayon fibers coated with the treatment agent were conditioned for 24 hours in a constant temperature chamber at 20°C and 65% RH, and then fed into a small carding machine. The ratio of discharge to input was calculated, and the results were evaluated according to the following evaluation criteria. The results are shown in the "Carding Machine Passability Test" column of Table 2.

[0189] Evaluation Criteria for Combing Machine Passability

[0190] ◎(Good): Discharge rate is above 90%

[0191] ○ (Qualified): Discharge rate is 80% or higher but less than 90%.

[0192] × (Unacceptable): Discharge rate less than 80%

[0193] (Evaluation of emulsion stability)

[0194] Add 100g of a 10% aqueous solution of each treatment agent prepared in test group 1 to a 100ml carrot-shaped precipitation bottle and let it stand at 25°C. After 24 hours, confirm the amount of precipitation and evaluate it according to the following evaluation criteria. The results are shown in the "Emulsion Stability Test" column of Table 2.

[0195] Evaluation criteria for emulsification stability

[0196] ◎(Good): Precipitation volume is less than 0.1 ml

[0197] ○ (Qualified): The amount of sediment is greater than 0.1 ml but less than 0.5 ml

[0198] × (Unacceptable): Sediment content greater than 0.5ml

[0199] [Table 2]

[0200]

[0201] As can be seen from the results in Table 2, the treatment agent according to the present invention has the effect of reducing flaking and foaming. Furthermore, it has the effect of reducing the odor of fibers with the treatment agent adhering to them.

[0202] This disclosure also includes the following methods.

[0203] (Postscript 1)

[0204] A treatment agent for viscose rayon, characterized in that it contains fatty acid derivatives, at least one selected from the following fatty acids and oils, and an antioxidant.

[0205] Fatty acid derivatives: at least one of the following: compounds formed by adding ethylene oxide to fatty acids having 12 or more and 24 carbon atoms in a ratio of 1 mole or more and 30 moles or less; compounds formed by polymerizing ethylene glycol in a ratio of 1 mole or more and 50 moles or less; and ester compounds of fatty acids having 12 or more and 2 moles or less and having 1 mole or more and 2 moles or less and having 12 or more and 24 carbon atoms.

[0206] Fatty acids: Fatty acids with 12 or more but less than 24 carbon atoms.

[0207] Oils and fats: selected from at least one of vegetable oils, animal oils, and their hydrogenated oils.

[0208] (Postscript 2)

[0209] According to the treatment agent for viscose rayon described in Appendix 1, wherein...

[0210] When the total content of the above-mentioned fatty acid derivatives, at least one selected from the above-mentioned fatty acids and the above-mentioned oils and fats is set to 100 parts by mass,

[0211] It contains the above-mentioned fatty acid derivatives in a proportion of 80 parts by weight or more and 99.89 parts by weight or less, contains at least one selected from the above-mentioned fatty acids and the above-mentioned oils and fats in a proportion of 0.01 parts by weight or more and 10 parts by weight or less, and contains the above-mentioned antioxidants in a proportion of 0.1 parts by weight or more and 10 parts by weight or less.

[0212] (Note 3)

[0213] The viscose rayon treatment agent according to Appendix 1 further contains at least one selected from the following lubricants and anionic surfactants.

[0214] Lubricant: selected from at least one of hydrocarbon compounds, ester compounds (excluding the above-mentioned greases and fatty acid derivatives), and silicones.

[0215] (Postscript 4)

[0216] According to the treatment agent for viscose rayon described in Appendix 3, wherein...

[0217] The treatment agent comprises the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acids and the aforementioned oils, the aforementioned antioxidant, and the aforementioned lubricant.

[0218] When the total content of the above-mentioned fatty acid derivatives, at least one selected from the above-mentioned fatty acids and the above-mentioned oils, the above-mentioned antioxidants, and the above-mentioned lubricants is set to 100 parts by mass,

[0219] It contains the above-mentioned fatty acid derivatives in a proportion of 60 parts by mass and 98.89 parts by mass, contains at least one selected from the above-mentioned fatty acids and the above-mentioned oils in a proportion of 0.01 parts by mass and 10 parts by mass, contains the above-mentioned antioxidant in a proportion of 0.1 parts by mass and 10 parts by mass, and contains the above-mentioned lubricant in a proportion of 1 part by mass and 20 parts by mass.

[0220] (Note 5)

[0221] According to the treatment agent for viscose rayon described in Appendix 3, wherein...

[0222] The treatment agent comprises the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acids and the aforementioned oils, the aforementioned antioxidant, and the aforementioned anionic surfactant.

[0223] When the total content of the above-mentioned fatty acid derivatives, at least one selected from the above-mentioned fatty acids and the above-mentioned oils, the above-mentioned antioxidants, and the above-mentioned anionic surfactants is set to 100 parts by mass,

[0224] It contains the above-mentioned fatty acid derivative in a proportion of 60 parts by mass and 98.89 parts by mass, contains at least one selected from the above-mentioned fatty acid and the above-mentioned oil in a proportion of 0.01 parts by mass and 10 parts by mass, contains the above-mentioned antioxidant in a proportion of 0.1 parts by mass and 10 parts by mass, and contains the above-mentioned anionic surfactant in a proportion of 1 part by mass and 20 parts by mass.

[0225] (Note 6)

[0226] According to the treatment agent for viscose rayon described in Appendix 3, wherein...

[0227] The treatment agent comprises the aforementioned fatty acid derivative, at least one selected from the aforementioned fatty acids and the aforementioned oils, the aforementioned antioxidant, the aforementioned lubricant, and the aforementioned anionic surfactant.

[0228] When the total content of the above-mentioned fatty acid derivatives, at least one selected from the above-mentioned fatty acids and the above-mentioned oils, the above-mentioned antioxidants, the above-mentioned lubricants, and the above-mentioned anionic surfactants is set to 100 parts by mass,

[0229] The product contains the above-mentioned fatty acid derivative in a proportion of 40 parts by weight or more and 97.89 parts by weight or less; contains at least one selected from the above-mentioned fatty acid and the above-mentioned oil in a proportion of 0.01 parts by weight or more and 10 parts by weight or less; contains the above-mentioned antioxidant in a proportion of 0.1 parts by weight or more and 10 parts by weight or less; contains the above-mentioned lubricant in a proportion of 1 part by weight or more and 20 parts by weight or less; and contains the above-mentioned anionic surfactant in a proportion of 1 part by weight or more and 20 parts by weight or less.

[0230] (Note 7)

[0231] The viscose rayon treatment agent according to any one of Appendices 1 to 6, wherein the viscose rayon is viscose rayon short fiber.

[0232] (Postscript 8)

[0233] A viscose rayon, characterized in that it is coated with any of the following treatment agents for viscose rayon as described in Appendix 1 to 6.

[0234] (Note 9)

[0235] A viscose rayon staple fiber, characterized in that it is coated with any one of the viscose rayon treatment agents described in Appendix 1 to 6.

[0236] (Postscript 10)

[0237] A method for manufacturing a spunlace nonwoven fabric, characterized by comprising the following steps 1 to 2.

[0238] Step 1: The process of combing the viscose rayon short fibers described in Appendix 9 to manufacture a carding web.

[0239] Step 2: The process of using water flow to interweave the carding web obtained in Step 1 above.

Claims

1. A treatment agent for viscose rayon, characterized in that, contains the following fatty acid derivative, at least one selected from the following fatty acid and oil-and-fat, and an antioxidant, In the treating agent for viscose rayon, the proportion of the fatty acid derivative is 30% by mass or more and 95% by mass or less, the proportion of the at least one selected from the fatty acid and the oil-and-fat is 0.01% by mass or more and 15% by mass or less, and the content of the antioxidant is 0.1% by mass or more and 10% by mass or less, Fatty acid derivative: at least one selected from a compound in which 1 mole or more and 30 moles or less of ethylene oxide are added to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, and an ester compound in which 1 mole or more and 2 moles or less of a fatty acid having 12 or more and 24 or less carbon atoms are esterified with 4 moles or more and 50 moles or less of a compound in which ethylene glycol is polymerized, Fatty acid: a fatty acid having 12 or more and 24 or less carbon atoms, Oil-and-fat: at least one selected from vegetable oil, animal oil, and hydrogenated oil thereof.

2. The treating agent for viscose rayon according to claim 1, further containing at least one selected from the following lubricant and anionic surfactant, at a proportion of 0.1% by mass or more and 25% by mass or less, Lubricant: at least one selected from a hydrocarbon compound, an ester compound, and a silicone, the ester compound excluding the oil-and-fat and the fatty acid derivative.

3. A treatment agent for viscose rayon, characterized in that, contains the following fatty acid derivative, at least one selected from the following fatty acid and oil-and-fat, and an antioxidant, The content of the antioxidant in the treating agent for viscose rayon is 0.1% by mass or more and 10% by mass or less, Fatty acid derivative: at least one selected from a compound in which 1 mole or more and 30 moles or less of ethylene oxide are added to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, and an ester compound in which 1 mole or more and 2 moles or less of a fatty acid having 12 or more and 24 or less carbon atoms are esterified with 4 moles or more and 50 moles or less of a compound in which ethylene glycol is polymerized, Fatty acid: a fatty acid having 12 or more and 24 or less carbon atoms, Oil-and-fat: at least one selected from vegetable oil, animal oil, and hydrogenated oil thereof. When the total proportion of the fatty acid derivative, at least one selected from the fatty acid and the oil-and-fat, and the antioxidant is set to 100 parts by mass, the fatty acid derivative is contained at a proportion of 80 parts by mass or more and 99.89 parts by mass or less, at least one selected from the fatty acid and the oil-and-fat is contained at a proportion of 0.01 parts by mass or more and 10 parts by mass or less, and the antioxidant is contained at a proportion of 0.1 parts by mass or more and 10 parts by mass or less.

4. The treating agent for viscose rayon according to claim 3, wherein the treating agent contains the fatty acid derivative, at least one selected from the fatty acid and the oil-and-fat, the antioxidant, and the following lubricant, Lubricant: at least one selected from the group consisting of a hydrocarbon compound, an ester compound, and a silicone, the ester compound excluding the oil and the fatty acid derivative, The total content of the fatty acid derivative, at least one selected from the group consisting of the fatty acid and the oil, the antioxidant, and the lubricant is set to 100 parts by mass, The fatty acid derivative is contained in a proportion of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from the group consisting of the fatty acid and the oil is contained in a proportion of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a proportion of 0.1 parts by mass or more and 10 parts by mass or less, and the lubricant is contained in a proportion of 1 part by mass or more and 20 parts by mass or less.

5. The treating agent for viscose rayon of claim 3, wherein the treating agent contains the fatty acid derivative, at least one selected from the group consisting of the fatty acid and the oil, the antioxidant, and the anionic surfactant, The total content of the fatty acid derivative, at least one selected from the group consisting of 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 proportion of 60 parts by mass or more and 98.89 parts by mass or less, at least one selected from the group consisting of the fatty acid and the oil is contained in a proportion of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a proportion of 0.1 parts by mass or more and 10 parts by mass or less, and the anionic surfactant is contained in a proportion of 1 part by mass or more and 20 parts by mass or less.

6. The treating agent for viscose rayon of claim 3, wherein the treating agent contains the fatty acid derivative, at least one selected from the group consisting of the fatty acid and the oil, the antioxidant, the following lubricant, and the anionic surfactant, Lubricant: at least one selected from the group consisting of a hydrocarbon compound, an ester compound, and a silicone, the ester compound excluding the oil and the fatty acid derivative, The total content of the fatty acid derivative, at least one selected from the group consisting of 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 proportion of 40 parts by mass or more and 97.89 parts by mass or less, at least one selected from the group consisting of the fatty acid and the oil is contained in a proportion of 0.01 parts by mass or more and 10 parts by mass or less, the antioxidant is contained in a proportion of 0.1 parts by mass or more and 10 parts by mass or less, the lubricant is contained in a proportion of 1 part by mass or more and 20 parts by mass or less, and the anionic surfactant is contained in a proportion of 1 part by mass or more and 20 parts by mass or less. The viscose rayon is a viscose rayon staple fiber. The viscose rayon staple fiber is attached with the treating agent for viscose rayon according to any one of claims 1 to 6.

7. The sizing agent for viscose rayon according to any one of claims 1 to 6, wherein The viscose rayon staple fiber is attached with the treating agent for viscose rayon according to any one of claims 1 to 6.

8. A viscose rayon characterized by, The viscose rayon staple fiber includes the following processes 1 and 2, 9. A viscose rayon staple fiber, characterized by, The viscose rayon staple fiber includes the following processes 1 and 2, 10. A method for manufacturing a spunlace nonwoven fabric, characterized by, ​ Process 1: a process of carding the adhesive rayon spun yarn staple fiber of claim 9 to produce a card web, Process 2: a process of interlacing the card web obtained in said process 1 using a water stream.

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