JP2024039910A - Process for producing viscose rayon processing agent, viscose rayon, viscose rayon staple fiber, and spunlace nonwoven fabric - Google Patents

Abstract

[Problem] To provide a treating agent for viscose rayon which can improve the effect of reducing bubbles caused by water used in hydroentanglement and reduce the generation of cotton odor. [Solution] The treating agent for viscose rayon contains the following fatty acid derivative, at least one selected from the following fatty acids and oils and fats, and an antioxidant. 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 to 24 carbon atoms, and an ester compound of 1 mole of a compound obtained by polymerizing 4 moles or more and 50 moles or less of ethylene glycol and 1 mole or more and 2 moles or less of a fatty acid having 12 to 24 carbon atoms. Fatty acid: a fatty acid having 12 to 24 carbon atoms. Oils and fats: at least one selected from vegetable oils, animal oils, and hardened oils thereof. [Selected Figure] None

Description

The present invention relates to a processing agent for viscose rayon, viscose rayon to which the processing agent for viscose rayon is attached, short fibers of the same viscose rayon, and a method for producing a spunlace nonwoven fabric.

Natural fibers such as cotton fibers, recycled fibers such as rayon, and synthetic resins such as polyolefin are known as raw material fibers used for nonwoven fabrics. Among them, viscose rayon, which is a recycled fiber made from pulp, cotton linter, etc., is attracting attention because of its excellent biodegradability and excellent hygroscopic and water absorbing properties.

When manufacturing nonwoven fabrics, a treatment agent for nonwoven fabrics containing surfactants, etc. is sometimes applied to the surface of raw fibers in order to impart various properties such as lubricity and cohesiveness. . Patent Document 1 discloses a treatment agent for spunlace fibers that is attached to raw material fibers such as viscose rayon when producing spunlace nonwoven fabrics. This treatment agent for spunlace fibers contains a polyoxyalkylene derivative and a functional agent.

Patent No. 6132966

However, this conventional treatment agent for spunlace fibers is unable to achieve both the reduction of foaming caused by the water used for hydroentangling in the nonwoven fabric manufacturing process, and the reduction of the odor of the raw fibers to which the treatment agent for spunlace fibers is attached. There is an issue of insufficiency.

As a result of research to solve the above problems, the present inventors found that a viscose rayon treatment agent containing three specific components is truly suitable.
Each aspect of the viscose rayon treatment agent that solves the above problems will be described.

The gist of the viscose rayon treatment agent of aspect 1 is that it contains the following fatty acid derivatives, at least one selected from the following fatty acids and fats and oils, and an antioxidant. Fatty acid derivatives: Compounds in which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of fatty acids having 12 to 24 carbon atoms, and 1 mol of compounds polymerized with 4 mol to 50 mol of ethylene glycol and carbon. At least one selected from ester compounds with 1 mol or more and 2 mol or less of a fatty acid having a number of 12 or more and 24 or less. Fatty acid: Fatty acid having 12 or more and 24 or less carbon atoms. Fat: At least one selected from vegetable oil, animal oil, and hydrogenated oil.

The viscose rayon treatment agent of aspect 2 is the treatment agent for viscose rayon according to aspect 1, which has a total content of at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, and the antioxidant. is 100 parts by mass, the fatty acid derivative is 5 parts by mass or more and 99.89 parts by mass or less, at least one selected from the fatty acid and the oil or fat is 0.01 part by mass or more and 10 parts by mass or less, and the antioxidant It is preferable to contain 0.1 parts by mass or more and 10 parts by mass or less.

The treatment agent for viscose rayon according to aspect 3 may further contain at least one selected from the following lubricants and anionic surfactants in the treatment agent for viscose rayon according to aspect 1. Lubricant: at least one selected from hydrocarbon compounds, ester compounds (excluding the oils and fats and fatty acid derivatives), and silicones.

The treatment agent for viscose rayon according to aspect 4 is the treatment agent for viscose rayon according to aspect 3, which comprises at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, the antioxidant, and the lubricant. If the total content of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the lubricant is 100 parts by mass, the fatty acid derivative is 5 parts by mass or more and 98.89 parts by mass. 0.01 parts by mass or more and 10 parts by mass or less of at least one selected from the fatty acids and the oils and fats, 0.1 parts by mass or more and 10 parts by mass of the antioxidant, and 1 part by mass of the lubricant It is good to contain it in the ratio of 1 part or more and 20 parts by mass or less.

The treatment agent for viscose rayon according to aspect 5 is the treatment agent for viscose rayon according to aspect 3, which contains at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, the antioxidant, and the anionic surfactant. If the total content of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the anionic surfactant is 100 parts by mass, the fatty acid derivative is 5 parts by mass. 98.89 parts by mass or less, 0.01 parts by mass or more and 10 parts by mass or less of at least one selected from the fatty acids and the oils and fats, 0.1 parts by mass or more and 10 parts by mass or less of the antioxidant, and the anion It is preferable to contain the surfactant in a proportion of 1 part by mass or more and 20 parts by mass or less.

The treatment agent for viscose rayon according to aspect 6 is the treatment agent for viscose rayon according to aspect 3, which contains at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, the antioxidant, the lubricant, and When the total content of the anionic surfactant, at least one selected from the fatty acid derivative, the fatty acid, and the oil/fat, the antioxidant, the lubricant, and the anionic surfactant is 100 parts by mass. , 5 parts by mass to 97.89 parts by mass of the fatty acid derivative, 0.01 parts by mass to 10 parts by mass of at least one selected from the fatty acids and the oils, and 0.1 parts by mass to 10 parts by mass of the antioxidant. The lubricant may be contained in a proportion of 1 part by mass or more and 20 parts by mass or less, and the anionic surfactant may be contained in a proportion of 1 part by mass or more and 20 parts by mass or less.

In the viscose rayon processing agent according to aspect 7, in the viscose rayon treatment agent according to any one of aspects 1 to 6, the viscose rayon is preferably viscose rayon short fibers.

Aspects of viscose rayon that solve the above problems will be described.
The gist of the viscose rayon of aspect 8 is that the viscose rayon treatment agent according to any one of aspects 1 to 7 is attached.

The gist of the viscose rayon staple fiber of aspect 9 is that the viscose rayon treatment agent according to any one of aspects 1 to 7 is attached.
An embodiment of a method for producing a spunlace nonwoven fabric that solves the above problems will be described.

The gist of the method for producing a spunlace nonwoven fabric according to aspect 10 is that it includes the following steps 1 and 2. Step 1: A step of carding the viscose rayon staple fiber of Embodiment 9 to produce a web. Step 2: A step of entangling the web obtained in Step 1 with a water stream.

According to the present invention, it is possible to improve the effect of reducing foaming caused by water used for hydroentangling, and to reduce the occurrence of cotton odor in viscose rayon.

(First embodiment)
Hereinafter, a first embodiment of the viscose rayon treatment agent (hereinafter referred to as "treatment agent") of the present invention will be described. The processing agent contains the following fatty acid derivatives, at least one selected from the following fatty acids and fats and oils, and an antioxidant. Fatty acid derivatives include compounds in which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of fatty acids having 12 to 24 carbon atoms, and 1 mol of compounds in which 4 mol to 50 mol of ethylene glycol is polymerized. It is at least one selected from ester compounds with 1 mol to 2 mol of fatty acids having 12 to 24 carbon atoms. The fatty acid is a fatty acid having 12 or more and 24 or less carbon atoms. The oil is at least one selected from vegetable oils, animal oils, and hydrogenated oils thereof. Furthermore, if necessary, a lubricant and/or an anionic surfactant may be contained.

<About fatty acid derivative (A)>
The fatty acid derivative (A) used in the treatment agent of this embodiment is a compound to which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of a fatty acid having 12 to 24 carbon atoms, and 4 mol of ethylene glycol. It is at least one selected from ester compounds of 1 mol or more of a polymerized compound of 50 mol or less and 1 mol or more and 2 mol or less of a fatty acid having 12 or more and 24 or less carbon atoms.

As the fatty acid serving as a raw material for the fatty acid derivative (A), any known fatty acid can be used as appropriate, and it may be a saturated fatty acid or an unsaturated fatty acid. Furthermore, it may be linear or may have a branched 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 in which the above upper and lower limits are arbitrarily combined are also envisioned.

The number of moles of ethylene oxide added is 1 mole or more and 30 moles or less, preferably 2 moles or more and 25 moles or less. Ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. Note that the number of moles of ethylene oxide added indicates the number of moles of ethylene oxide per mole of fatty acid as a raw material.

Specific examples of the fatty acid derivatives (A) include (1) a compound in which 20 moles of ethylene oxide is added to 1 mole of oleic acid; a compound in which 10 moles of ethylene oxide is added to 1 mole of oleic acid; A compound with 30 moles of ethylene oxide added to each mole, a compound with 5 moles of ethylene oxide added to 1 mole of stearic acid, a compound with 10 moles of ethylene oxide added to 1 mole of stearic acid, a compound with 1 mole of ethylene oxide added to 1 mole of lauric acid. On the other hand, polyoxyethylene alkyl (or alkylene) ester obtained by addition reaction of ethylene oxide to a saturated or unsaturated fatty acid such as a compound to which 10 moles of ethylene oxide has been added, (2) Compound 1 obtained by polymerizing 9 moles of ethylene glycol An ester compound of 1 mole of oleic acid and 1 mole of oleic acid, an ester compound of 1 mole of a compound obtained by polymerizing 14 moles of ethylene glycol and 2 moles of oleic acid, an ester compound of 1 mole of a compound obtained by polymerizing 23 moles of ethylene glycol and 1 mole of stearic acid. Saturated or unsaturated ester compounds, ester compounds of 1 mole of a compound obtained by polymerizing 9 moles of ethylene glycol and 2 moles of lauric acid, ester compounds of 1 mole of a compound obtained by polymerizing 23 moles of ethylene glycol and 2 moles of stearic acid, etc. Polyethylene glycol alkyl (or alkylene) ester obtained by addition reaction of polyethylene glycol to fatty acid, (3) compound with 30 moles of ethylene oxide added to 1 mole of castor oil, 10 moles of ethylene oxide to 1 mole of hydrogenated castor oil. Examples include esters of oil-derived fatty acids of polyoxyethylene obtained by addition reaction of ethylene oxide to naturally occurring fatty acids, such as compounds in which 1 mole of ethylene oxide is added to 1 mole of coconut fatty acid. .

As the fatty acid derivative (A), one type of fatty acid derivative may be used alone, or two or more types of fatty acid derivatives may be used in combination.
In the processing agent, the lower limit of the content of the fatty acid derivative (A) is preferably 30% by mass or more, more preferably 40% by mass or more. Further, the upper limit of the content of the fatty acid derivative (A) is preferably 95% by mass or less, more preferably 92% by mass or less. By specifying the content within this range, the effects of the present invention can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About fatty acids (B1) and fats and oils (B2)>
The fatty acid (B1) used in the treatment agent of this embodiment is a fatty acid having 12 or more and 24 or less carbon atoms. As the fatty acid having 12 or more carbon atoms and 24 or less carbon atoms, known fatty acids can be used as appropriate. It may be a saturated fatty acid or an unsaturated fatty acid. Furthermore, it may be linear or may have a branched structure. The number of carbon atoms in the fatty acid (B1) is 12 or more and 24 or less, preferably 12 or more and 22 or less. Ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. Specific examples of the fatty acid (B1) include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, lignoceric acid, coconut fatty acid, and the like.

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

As the fatty acid (B1) and the fat or oil (B2), one type of fatty acid and/or fat may be used alone, or two or more types of fatty acid and/or fat may be used in combination.
In the processing agent, the lower limit of the content of at least one selected from fatty acids (B1) and fats and oils (B2) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. By specifying the content within this range, the effect of reducing foaming caused by shedding can be further improved. Further, the upper limit of the content ratio of such components is preferably 15% by mass or less, more preferably 10% by mass or less. By regulating the content within this range, emulsion stability can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About antioxidant (C)>
As the antioxidant (C) used in the treatment agent of this embodiment, any known antioxidant can be used as appropriate. Specific examples of the antioxidant (C) include (1) 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4 , 6-(1H,3H,5H)-trione, 1,3,5-tris(3',5'-di-t-butyl-4-hydroxybenzyl)isocyanuric acid, 1,3,5-tris(4 -t-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl) Benzene, 2,2'-methylene-bis(4-methyl-6-t-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylpheny)butane, pentaerythritol tetrakis Phenolic antioxidants such as [3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate], (2) 4,4'-thiobis-(6-t-butyl-3) -methylphenol), dilauryl-3,3'-thiodipropionate, 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl bis[3-(dodecylthio) ) propionate], thioether antioxidants such as ditridecane-1-yl 3,3'-sulfanediyl dipropanoate, (3) 3,9-bis(2,6-di-t-butyl-4- methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(mixed, mono and dinonylphenyl)phosphite, tris(2,3-di-t- butylphenyl) phosphite, 4,4'-butylidene-bis(3-methyl-6-t-butylphenyl-di-tridecyl) phosphite, 1,1,3-tris(2-methyl-4-di-tridecyl) phosphite, Decylphosphite-5-t-butylphenyl)butane, tris(2,4-di-t-butylphenyl)phosphite, bis(2,4-di-t-butylphenyl)pentaerythritol-di-phosphite, Tetrakis(2,4-di-t-butylphenyl)-4,4'-biphenylenephosphanite, bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol-di-phosphite, Tetrakis(2,4-di-t-butylphenyl) 4,4'-biphenylene diphosphonite, Tetratridecyl-4,4'-butylidene-bis-(2-t-butyl-5-methylphenol) diphosphite , triphenyl phosphite, diphenyldecyl phosphite, tridecyl phosphite, trioctyl phosphite, tridodecyl phosphite, triotadecyl phosphite, trinonylphenyl phosphite, tridodecyl trithiophosphite, octyldiphenyl phosphite, etc. Examples include antioxidants.

As the antioxidant (C), one type of antioxidant may be used alone, or two or more types of antioxidants may be used in combination. When using one kind of antioxidant alone, it is preferable to use a phenolic antioxidant or a thioether antioxidant. In the case of such a configuration, the effects of the present invention, particularly the effect of reducing cotton odor, can be further improved. When using two or more kinds of antioxidants in combination, it is preferable to use a phenolic antioxidant and a thioether antioxidant in combination. In the case of such a configuration, the effect of reducing cotton odor can be further improved.

The processing agent of the present embodiment is particularly limited in the content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), and the antioxidant (C) in the processing agent. There isn't. If the total content of the fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), and the antioxidant (C) described above is 100 parts by mass, then the fatty acid derivative (A) is 5 parts by mass. 0.01 parts by mass to 10 parts by mass of at least one selected from fatty acids (B1) and fats and oils (B2), and 0.1 parts by mass of antioxidant (C) It is preferable that the content be greater than or equal to 10 parts by mass or less. In the case of such a configuration, the effects of the present invention can be further improved.

In the treatment agent, the lower limit of the content of the antioxidant (C) is preferably 0.1% by mass or more, more preferably 0.15% by mass or more. By specifying the content within such a range, the effect of reducing cotton odor can be particularly improved. Further, the upper limit of the content of the antioxidant (C) is preferably 15% by mass or less, more preferably 10% by mass or less. By regulating the content within this range, emulsion stability can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About lubricant (D)>
The treatment agent (D) of the present embodiment may further contain at least one lubricant selected from hydrocarbon compounds, ester compounds (excluding the fatty acid derivatives (A) and oils and fats (B2)), and silicones. good. By blending this lubricant (D), the effects of the present invention, particularly the card passageability, can be further improved.

Specific examples of hydrocarbon compounds include mineral oil, paraffin wax, and the like.
Specific examples of ester compounds include ester compounds of aliphatic monoalcohols and aliphatic monocarboxylic acids such as butyl stearate and stearyl stearate, glycerin monooleate, glycerin trioleate, sorbitan monolaurate, and sorbitan trilaurate. , sorbitan monooleate, sorbitan trioleate, sorbitan monostearate, sorbitan tristearate, and other ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids. The ester compound used as a lubricant is a compound obtained by reacting a fatty acid with an alcohol, excluding the fatty acid derivative (A) and the oil (B2).

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

The processing agent of this embodiment includes the above-mentioned fatty acid derivative (A) in the processing agent, at least one selected from fatty acids (B1) and fats and oils (B2), an antioxidant (C), and a lubricant (D). When containing, there is no particular restriction on the content ratio of these. When the total content of at least one selected from the fatty acid derivative (A), the fatty acid (B1), and the oil (B2), the antioxidant (C), and the lubricant (D) described above is 100 parts by mass, the fatty acid Derivative (A) from 5 parts by mass to 98.89 parts by mass, at least one selected from fatty acids (B1) and fats and oils (B2) from 0.01 parts by mass to 10 parts by mass, and antioxidant (C). Preferably, the lubricant (D) is contained in a proportion of 0.1 part by mass or more and 10 parts by mass or less, and a lubricant (D) in a proportion of 1 part by mass or more and 20 parts by mass or less. In the case of such a configuration, the effects of the present invention can be further improved.

In the processing agent, the lower limit of the content of the lubricant (D) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying the content within such a range, it is possible to particularly improve card passage performance. Further, the upper limit of the content of the lubricant (D) is preferably 25% by mass or less, more preferably 20% by mass or less. By regulating the content within this range, emulsion stability can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About anionic surfactant (E)>
The processing agent of this embodiment may further contain an anionic surfactant (E). By blending this anionic surfactant (E), the effects of the present invention, particularly the emulsion stability when the processing agent is prepared into an aqueous liquid, can be further improved.

As the anionic surfactant (E), any known one can be used as appropriate. Specific examples of the anionic surfactant (E) include (1) phosphorus of aliphatic alcohols such as lauryl phosphate, cetyl phosphate, octyl phosphate, oleyl phosphate, and stearyl phosphate; acid ester salts, (2) aliphatic alcohols such as polyoxyethylene lauryl ether phosphate ester salts, polyoxyethylene oleyl ether phosphate ester salts, and polyoxyethylene stearyl ether phosphate ester salts selected from ethylene oxide and propylene oxide; Phosphoric ester salts of products to which at least one alkylene oxide has been added, (3) lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecane sulfonate, dodecylbenzene sulfone acid salts, aliphatic sulfonates or aromatic sulfonates such as secondary alkylsulfonic acid (C13-15) salts, (4) aliphatic alcohols such as lauryl sulfate, oleyl sulfate, and stearyl sulfate; (5) Polyoxyethylene lauryl ether sulfate, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate, polyoxyethylene oleyl ether sulfate, etc. sulfate ester salt of a product to which at least one alkylene oxide selected from oxide and propylene oxide is added, (6) castor oil fatty acid sulfate ester salt, sesame oil fatty acid sulfate ester salt, tall oil fatty acid sulfate ester salt, soybean oil fatty acid sulfate ester salt, rapeseed oil Fatty acid sulfate ester salts, palm oil fatty acid sulfate ester salts, lard fatty acid sulfate ester salts, beef tallow fatty acid sulfate ester salts, whale oil fatty acid sulfate ester salts, etc. (7) Castor oil sulfate ester salts, sesame oil sulfuric ester salts Ester salts, tall oil sulfate ester salts, soybean oil sulfate ester salts, rapeseed oil sulfate ester salts, palm oil sulfate ester salts, lard sulfate ester salts, beef tallow sulfate ester salts, whale oil sulfate ester salts, etc. Examples include sulfuric acid ester salts of fats and oils, (8) fatty acid salts such as laurate, oleate, and stearate, and (9) sulfosuccinic acid ester salts of aliphatic alcohols such as dioctyl sulfosuccinate. 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.

As the anionic surfactant (E), one type of anionic surfactant may be used alone, or two or more types of anionic surfactants may be used in combination.
The processing agent of this embodiment contains the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), an antioxidant (C), and an anionic surfactant ( When E) is contained, there is no particular restriction on the content ratio thereof. When the total content of at least one selected from the fatty acid derivative (A), fatty acid (B1), and oil or fat (B2), the antioxidant (C), and the anionic surfactant (E) mentioned above is 100 parts by mass. , 5 parts by mass or more and 98.89 parts by mass or less of a fatty acid derivative (A), 0.01 parts by mass or more and 10 parts by mass or less of at least one selected from fatty acids (B1) and fats and oils (B2), and an antioxidant (C ) in a proportion of 0.1 part by mass or more and 10 parts by mass or less, and an anionic surfactant (E) in a proportion of 1 part by mass or more and 20 parts by mass or less. In the case of such a configuration, the effects of the present invention can be further improved.

In addition, when the treatment agent of this embodiment contains the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), antioxidant (C), lubricant (D), and anionic surfactant (E), there is no particular restriction on the content ratio of these. When the total content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), antioxidant (C), lubricant (D), and anionic surfactant (E) is 100 parts by mass, it is preferable that the fatty acid derivative (A) is 5 parts by mass or more and 97.89 parts by mass or less, at least one selected from fatty acids (B1) and fats and oils (B2) is 0.01 parts by mass or more and 10 parts by mass or less, antioxidant (C) is 0.1 parts by mass or more and 10 parts by mass or less, lubricant (D) is 1 part by mass or more and 20 parts by mass or less, and anionic surfactant (E) is 1 part by mass or more and 20 parts by mass or less. In this case, the effect of the present invention can be further improved.

In the processing agent, the lower limit of the content of the anionic surfactant (E) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying the content within such a range, emulsion stability in particular can be further improved. Further, the upper limit of the content of the anionic surfactant (E) is preferably 25% by mass or less, more preferably 20% by mass or less. By specifying the content within this range, the effect of reducing foaming caused by shedding can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About other ingredients>
The processing agent of the present embodiment may further contain nonionic surfactants, polyhydric alcohols, etc. other than those mentioned above as other components within a range that does not impede the effects of the present invention.

Specific examples of nonionic surfactants include (1) a compound in which 10 moles of ethylene oxide is added to 1 mole of lauryl alcohol, a compound in which 5 moles of ethylene oxide is added to 1 mole of stearyl alcohol, 1 mole of oleyl alcohol; A compound in which 30 moles of ethylene oxide was added per mole, a compound in which 10 moles of ethylene oxide was added to 1 mole of C12-13 alcohol, a compound in which 10 moles each of ethylene oxide and propylene oxide were randomly added to 1 mole of lauryl alcohol. A compound in which 6 moles of ethylene oxide and 2 moles of propylene oxide were randomly added to 1 mole of C12-13 alcohol, 5 moles of ethylene oxide was added to 1 mole of isodecyl alcohol, and then 5 moles of propylene oxide was added. An alkylene oxide is added to a saturated or unsaturated aliphatic monohydric alcohol, such as a compound obtained by adding 2 moles of propylene oxide to 1 mole of isodecyl alcohol, and then 5 moles of ethylene oxide. The resulting polyoxyalkylene alkyl (or alkenyl) ether, (2) a compound obtained by adding 10 moles of ethylene oxide to 1 mole of sorbitol and then adding 1 mole of lauric acid, 20 moles of ethylene oxide to 1 mole of sorbitol. A compound in which 20 moles of ethylene oxide was added to 1 mole of sorbitol and then 1 mole of stearic acid was added, a compound in which 1 mole of stearic acid was added to 1 mole of sorbitol, and 1 mole of oleic acid was added to 1 mole of sorbitol. Polyoxyalkylene polyhydric alcohol ether obtained by adding alkylene oxide to an aliphatic polyhydric alcohol such as a compound to which 20 moles of oxide is added and then 3 moles of stearic acid. (3) Ethylene oxide to octylphenol. Polyoxyalkylene alkylphenol ether obtained by addition reaction of alkylene oxide to alkylphenol such as a compound with 10 moles of ethylene oxide added to nonylphenol, (4) Addition of 5 moles of ethylene oxide to octylamine A polyoxy compound obtained by adding an alkylene oxide to a saturated or unsaturated aliphatic amine, such as a compound obtained by adding 8 moles of ethylene oxide to laurylamine, a compound having 20 moles of ethylene oxide added to stearylamine, etc. Examples include alkylene amino ether. In addition, when two or more types of alkylene oxides are applied, their addition form may be block addition, random addition, or a combination of block addition and random addition, and is not particularly limited.

Specific examples of polyhydric alcohols include ethylene glycol, propylene glycol, pentanediol, hexanediol, glycerin, pentaerythritol, sorbitol, sorbitan, polyethylene glycol, polypropylene glycol, and a reaction product of propylene glycol and alkylene oxide.

These other components may be used alone or in combination of two or more.
The content of these other components in the processing agent is preferably 50% by mass or less, more preferably 10% by mass or less, still more preferably 1% by mass or less, from the viewpoint of not impeding the effects of the present invention.

The viscose rayon to which the treatment agent of this embodiment is applied may be long fibers generally called filaments or short fibers generally called staples. Preferably, the fibers are short fibers. The length of the short fibers in this embodiment is not particularly limited as long as it corresponds to short fibers in this technical field, but for example, it is preferably 100 mm or less, and more preferably 51 mm or less.

According to the first embodiment, the following effects can be obtained.
(1) The processing agent of the present embodiment includes the above-described fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), and an antioxidant (C). Therefore, when the viscose rayon to which the treatment agent is attached is hydroentangled, the effect of reducing foaming caused by water used for hydroentangling can be improved. Thereby, operational efficiency can be improved in the spunlace nonwoven fabric production process. Furthermore, it is possible to reduce the occurrence of cotton odor from viscose rayon to which the treatment agent is attached. Furthermore, discoloration of viscose rayon cotton to which the treatment agent is attached can be reduced. Further, the card passing property when passing the viscose rayon to which the processing agent is attached through the card machine can be improved. Furthermore, the emulsion stability can be improved when the treatment agent is prepared as an aqueous liquid.

(Second embodiment)
Next, a second embodiment embodying the viscose rayon according to the present invention will be described. The treatment agent of the first embodiment is attached to the viscose rayon of this embodiment.

As a method for applying the treatment agent, known methods such as a dipping method, a spray method, a shower method, a roller method, a dropping/flowing method, etc. can be applied. Further, the process of adhering is not particularly limited, but includes, for example, a post-refining process, a spinning process, and the like.

The viscose rayon treated with the treatment agent of this embodiment can be the one described above.
Examples of the form of the treatment agent when it is applied to viscose rayon include an aqueous liquid and an organic solvent solution. In the method for treating viscose rayon, it is preferable to dilute the treatment agent of the first embodiment with water to form an aqueous liquid with a concentration of 0.5 to 20% by mass, and to apply this aqueous liquid to the viscose rayon. . It is preferable that the amount of the treatment agent deposited is such that the solid content excluding solvent is 0.1 to 1% by mass based on the viscose rayon.

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

Spunlace nonwoven fabric is manufactured by sequentially passing through a web forming process (step 1) in which a web is manufactured by carding viscose rayon, and a hydroentangling process (step 2) in which the web is entangled with a water stream. .

(Web forming process)
The web forming process is a process of carding the viscose rayon to which the above treatment agent has been adhered to produce a web. Carding can be performed using a known card machine. Examples include flat cards, combination cards, and roller cards.

(hydraulic entanglement process)
The hydroentangling step is a step of entangling the web obtained in the web forming step with a water stream. The web is irradiated with a high-pressure water stream, and the pressure of the water stream intertwines the fibers to form a sheet. After performing the hydroentangling step, a drying step and a winding step may be performed as appropriate.

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

The first to third embodiments can be implemented with the following modifications. The first to third embodiments and the following modified examples can be implemented in combination with each other within a technically consistent range.

・The processing agent of the above embodiment may contain surfactants other than those mentioned above to maintain the quality of the processing agent, antistatic agents, binders, Components commonly used in processing agents such as ultraviolet absorbers and pH adjusters may be further blended.

Examples will be given below to make the structure and effects of the present invention more concrete. The invention is not limited to these examples.
Test Category 1 <Preparation of treatment agent>
(Example 1)
The following materials were used as raw materials for the processing agent. Note that the numerical values of each component shown in Table 1 indicate the content in the processing agent.

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 (a phenolic antioxidant) 4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione, and a thioether antioxidant. Ditridecane-1-yl = 3,3'-sulfanediyl dipropanoate Lubricant (D): Stearyl stearate Anionic surfactant (E): Potassium lauryl phosphate ester The content ratios shown in Table 1 should be achieved. 900 parts of water was added to 100 parts of the treatment agent prepared in 1, and stirred at 50° C. to prepare a 10% aqueous solution containing 10% by mass of the treatment agent.

(Examples 2 to 24 and Comparative Examples 1 to 6)
The processing agents of Examples 2 to 24 and Comparative Examples 1 to 6 were prepared in the same manner as in the preparation of the processing agent and its aqueous solution in Example 1, and 10% aqueous solutions thereof were prepared.

Table 1 summarizes the contents of the processing agents of each example prepared above. The processing agents of Examples 3 to 4, 6, 8, and 24 and Comparative Examples 1 to 2, and 6 contain a nonionic surfactant and/or a polyhydric alcohol as other components. In Example 24 of Table 1, the content of other components (parts by mass (*)) is shown as parts by mass based on a total of 100 parts by mass of components (A) to (E).

Type and content of fatty acid derivative (A), type and content of fatty acid (B1) or oil (B2), type and content of antioxidant (C), type and content of lubricant (D), anion The type and content of surfactant (E) and the type and content of other components are listed in the "Fatty acid derivative (A)" column, "Fatty acid, oil (B)" column, and "Antioxidant (C)" column of Table 1. " column, "Lubricant (D)" column, "Anionic surfactant (E)" column, and "Other components" column, respectively.

Details of the fatty acid derivative (A), fatty acid (B1) or oil (B2), antioxidant (C), lubricant (D), anionic surfactant (E), and other ingredients listed in Table 1 are as follows. It is.

(Fatty acid derivative (A))
A-1: Compound with 20 moles of ethylene oxide added to 1 mole of oleic acid A-2: Compound with 5 moles of ethylene oxide added to 1 mole of stearic acid A-3: Ethylene oxide to 1 mole of stearic acid A-4: Ester compound of 1 mole of a compound obtained by polymerizing 9 moles of ethylene glycol and 2 moles of lauric acid A-5: 1 mole of a compound obtained by polymerizing 23 moles of ethylene glycol and 2 moles of stearic acid A-6: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of coconut fatty acid A-7: An ester compound of 1 mole of a compound obtained by polymerizing 14 moles of ethylene glycol and 2 moles of oleic acid A- 8: Compound in which 10 moles of ethylene oxide is added to 1 mole of oleic acid A-9: Compound in which 30 moles of ethylene oxide is added to 1 mole of oleic acid A-10: Compound 1 in which 9 moles of ethylene glycol is polymerized Ester compound of 1 mole of oleic acid (fatty acid (B1) or fat (B2))
B-1: Beef tallow B-2: Stearic acid B-3: Palmitic acid B-4: Coconut oil B-5: Palm oil B-6: Behenic acid B-7: Palm hydrogenated oil B-8: Castor hydrogenated oil B-9: Castor oil B-10: Oleic acid B-11: Pork fat B-12: Lauric acid B-13: Coconut fatty acid (antioxidant (C))
C-1: phenolic antioxidant 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6 -(1H,3H,5H)-trione C-2: Phenolic antioxidant pentaerythritol tetrakis [3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate]
C-3: Phosphorous antioxidant 3,9-bis(2,6-di-t-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5 .5] Undecane C-4: Ditridecan-1-yl 3,3'-sulfanediyl dipropanoate, a thioether antioxidant C-5: 2,2-bis({ [3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl bis[3-(dodecylthio)propionate]
(Lubricant (D))
D-1: Stearyl stearate D-2: Mineral oil (viscosity 500 seconds)
D-3: Dimethyl silicone D-4: Mineral oil (viscosity 180 seconds)
D-5: Amino silicone D-6: Paraffin wax D-7: Mineral oil (viscosity 60 seconds)
D-8: Glycerin monooleate D-9: Mineral oil (viscosity 80 seconds)
D-10: Sorbitan tristearate D-11: Sorbitan monostearate (anionic surfactant (E))
E-1: Lauryl phosphate potassium salt E-2: Dioctylsulfosuccinate sodium salt E-3: Tetradecane sulfonate sodium salt E-4: Sodium oleate E-5: Beef tallow sulfate ester sodium salt E-6: Stearin Potassium acid (other ingredients)
F-1: A compound in which 5 moles of ethylene oxide are added to 1 mole of stearyl alcohol F-2: A compound in which 6 moles of ethylene oxide and 2 moles of propylene oxide are randomly added to 1 mole of C12-13 alcohol F-3: Compound in which 5 moles of ethylene oxide was added to 1 mole of isodecyl alcohol, and then 5 moles of propylene oxide was added. F-4: After adding 2 moles of propylene oxide to 1 mole of isodecyl alcohol, ethylene oxide was added. Compound to which 5 mol of ethylene oxide was added F-5: Compound to which 20 mol of ethylene oxide was added to 1 mol of sorbitol, and then 1 mol of stearic acid was added F-6: 20 mol of ethylene oxide was added to 1 mol of sorbitol After addition, 3 moles of stearic acid was added to the compound F-7: Compound to which 8 moles of propylene glycol was polymerized F-8: Compound to which 45 moles of ethylene glycol was polymerized Test category 2 Adhesion of treatment agent>
The 10% aqueous solution of each treatment agent prepared in Test Section 1 was further diluted with water to prepare a 0.2% aqueous emulsion (% by mass). The aqueous emulsion of each example was applied to viscose rayon fibers with a fineness of 1.3 x 10 ^-4 g/m (1.2 denier) and a fiber length of 38 mm so that the adhesion amount (excluding the solvent) was 0.2% by mass. It was attached by spray lubrication. After drying in a hot air dryer at 80° C. for 2 hours, the fibers were conditioned overnight in an atmosphere of 25° C. and 40% RH to obtain viscose rayon fibers to which the treatment agent was attached.

Test Category 3 <Evaluation of treatment agent>
(Evaluation test)
Using the viscose rayon fibers to which the treatment agent was attached, tests were conducted including a shedding foaming property test, a cotton odor test, a cotton discoloration test, a card passage test, and an emulsion stability test. The procedure for each test is shown below. Further, the results of each test are shown in Table 2.

(Shedding foaming test)
First, 20 g of viscose rayon fibers to which the treatment agent was attached were added to 150 g of water, and after 15 minutes, the treated cotton was squeezed using a hand juicer. 10 g of this squeezing fluid was placed in a 25 ml measuring cylinder with a stopper and vigorously shaken for 30 seconds. After leaving it to stand still for 30 seconds, it was vigorously shaken again for 30 seconds. After allowing it to stand for 5 minutes, the height from the water surface to the top of the bubbles was measured. The results are shown in the "Shedding Foaming Test" column of Table 2.

Evaluation criteria for shedding foaming test ◎ (Good); Height from the water surface to the top of the bubbles is less than 1 mm ○ (Acceptable); Height from the water surface to the top of the bubbles is 1 mm or more and less than 2 mm × (Not acceptable); The height from the water surface to the top of the bubbles is 2 mm or more (cotton odor test)
20 g of viscose rayon fibers to which the treatment agent was attached were placed in 150 g of water, and after being sealed for 30 minutes, the odor was smelled. The cotton odor test was conducted on 10 testers. The results are shown in the "Cotton Odor Test" column of Table 2.

Evaluation criteria for cotton odor test ◎◎ (Excellent); No one judged that there was odor ◎ (Good); 1 to 2 people judged that there was odor ○ (Acceptable); 3 to 5 people judged that there was odor × (Unsatisfactory) ; 6 or more people judged it to have an odor (cotton discoloration test)
It was determined whether or not the viscose rayon fiber to which the treatment agent was applied had yellowed or other discoloration compared to before the treatment agent was applied. The cotton discoloration test was conducted on 10 testers. The results are shown in the "Cotton discoloration test" column of Table 2.

Evaluation criteria for cotton discoloration test ◎◎ (Excellent); No one judged that there was discoloration ◎ (Good); 1 to 2 people judged that there was discoloration ○ (Acceptable); 3 to 5 people judged that there was discoloration × (Unacceptable) ; 6 or more people judged that there was discoloration (evaluation of card passability)
20 g of viscose rayon fiber to which the treatment agent was attached was conditioned for 24 hours in a thermostatic chamber at 20° C. and 65% RH, and then applied to a miniature card machine. The ratio of discharge to input was calculated and evaluated using the following evaluation criteria. The results are shown in the "Card Passability Test" column of Table 2.

Evaluation criteria for card passability ◎ (Good): Emission amount is 90% or more ○ (Acceptable): Emission amount is 80% or more and less than 90% × (Unacceptable): Emission amount is less than 80% (Evaluation of emulsification stability)
100 g of the 10% aqueous solution of each treatment agent prepared in Test Section 1 was placed in a 100 ml carrot-type sedimentation bottle and allowed to stand at 25°C. After 24 hours, the amount of precipitate was confirmed and evaluated using the following evaluation criteria. The results are shown in the "Emulsification Stability Test" column of Table 2.

Evaluation criteria for emulsion stability ◎ (good); precipitation amount is 0.1 ml or less ○ (acceptable); precipitation amount is more than 0.1 ml and less than 0.5 ml × (impossible); precipitation amount is more than 0.5 ml

As is clear from the results in Table 2, the treatment agent of the present invention has the effect of improving the effect of reducing foaming caused by water used in hydroentangling. Further, there is an effect that the cotton odor of the fibers to which the treatment agent is attached can be reduced.

The present invention relates to a processing agent for viscose rayon, viscose rayon to which the processing agent for viscose rayon is attached, short fibers of the same viscose rayon, and a method for producing a spunlace nonwoven fabric.

Natural fibers such as cotton fibers, recycled fibers such as rayon, and synthetic resins such as polyolefin are known as raw material fibers used for nonwoven fabrics. Among them, viscose rayon, which is a recycled fiber made from pulp, cotton linter, etc., is attracting attention because of its excellent biodegradability and excellent hygroscopic and water absorbing properties.

When manufacturing nonwoven fabrics, a treatment agent for nonwoven fabrics containing surfactants, etc. is sometimes applied to the surface of raw fibers in order to impart various properties such as lubricity and cohesiveness. . Patent Document 1 discloses a processing agent for spunlace fibers that is attached to raw material fibers such as viscose rayon when producing spunlace nonwoven fabrics. This treatment agent for spunlace fibers contains a polyoxyalkylene derivative and a functional agent.

Patent No. 6132966

However, this conventional treatment agent for spunlace fibers is unable to simultaneously reduce the foaming caused by water used for hydroentangling in the nonwoven fabric manufacturing process and reduce the odor of raw fibers to which the treatment agent for spunlace fibers is attached. There is an issue of insufficiency.

As a result of research to solve the above problems, the present inventors found that a viscose rayon treatment agent containing three specific components is truly suitable.
Each aspect of the viscose rayon treatment agent that solves the above problems will be described.

The viscose rayon treatment agent of aspect 1 contains the following fatty acid derivatives, at least one selected from the following fatty acids and fats and oils , and an antioxidant, and the antioxidant in the viscose rayon treatment agent contains: The gist is that the content is 0.1% by mass or more and 10% by mass or less . Fatty acid derivatives: Compounds in which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of fatty acids having 12 to 24 carbon atoms, and 1 mol of compounds polymerized with 4 mol to 50 mol of ethylene glycol and carbon. At least one selected from ester compounds with 1 mol or more and 2 mol or less of a fatty acid having a number of 12 or more and 24 or less. Fatty acid: Fatty acid having 12 or more and 24 or less carbon atoms. Fat: At least one selected from vegetable oil, animal oil, and hydrogenated oil.

The viscose rayon treatment agent of aspect 2 is the treatment agent for viscose rayon according to aspect 1, which has a total content of at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, and the antioxidant. is 100 parts by mass, the fatty acid derivative is 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 or fat is 0.01 part by mass or more and 10 parts by mass or less, and the antioxidant It is preferable to contain 0.1 parts by mass or more and 10 parts by mass or less.

The treatment agent for viscose rayon according to aspect 3 may further contain at least one selected from the following lubricants and anionic surfactants in the treatment agent for viscose rayon according to aspect 1. Lubricant: at least one selected from hydrocarbon compounds, ester compounds (excluding the oils and fats and fatty acid derivatives), and silicones.

The treatment agent for viscose rayon according to aspect 4 is the treatment agent for viscose rayon according to aspect 3, which comprises at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, the antioxidant, and the lubricant. If the total content of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the lubricant is 100 parts by mass, the fatty acid derivative is 60 parts by mass or more and 98.89 parts by mass. 0.01 parts by mass or more and 10 parts by mass or less of at least one selected from the fatty acids and the oils and fats, 0.1 parts by mass or more and 10 parts by mass of the antioxidant, and 1 part by mass of the lubricant It is good to contain it in the ratio of 1 part or more and 20 parts by mass or less.

The treatment agent for viscose rayon according to aspect 5 is the treatment agent for viscose rayon according to aspect 3, which contains at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, the antioxidant, and the anionic surfactant. If the total content of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the anionic surfactant is 100 parts by mass, the fatty acid derivative is 60 parts by mass. 98.89 parts by mass or less, 0.01 parts by mass or more and 10 parts by mass or less of at least one selected from the fatty acids and the oils and fats, 0.1 parts by mass or more and 10 parts by mass or less of the antioxidant, and the anion It is preferable to contain the surfactant in a proportion of 1 part by mass or more and 20 parts by mass or less.

The treatment agent for viscose rayon according to aspect 6 is the treatment agent for viscose rayon according to aspect 3, which contains at least one selected from the fatty acid derivative, the fatty acid, and the oil and fat, the antioxidant, the lubricant, and When the total content of the anionic surfactant, at least one selected from the fatty acid derivative, the fatty acid, and the oil/fat, the antioxidant, the lubricant, and the anionic surfactant is 100 parts by mass. , 40 parts by mass to 97.89 parts by mass of the fatty acid derivative, 0.01 parts by mass to 10 parts by mass of at least one selected from the fatty acids and the oils and fats, and 0.1 parts by mass to 10 parts by mass of the antioxidant. The lubricant may be contained in a proportion of 1 part by mass or more and 20 parts by mass or less, and the anionic surfactant may be contained in a proportion of 1 part by mass or more and 20 parts by mass or less.

In the viscose rayon processing agent according to aspect 7, in the viscose rayon treatment agent according to any one of aspects 1 to 6, the viscose rayon is preferably viscose rayon short fibers.

Aspects of viscose rayon that solve the above problems will be described.
The gist of the viscose rayon of aspect 8 is that the viscose rayon treatment agent according to any one of aspects 1 to 7 is attached.

The gist of the viscose rayon staple fiber of aspect 9 is that the viscose rayon treatment agent according to any one of aspects 1 to 7 is attached.
An embodiment of a method for producing a spunlace nonwoven fabric that solves the above problems will be described.

The gist of the method for producing a spunlace nonwoven fabric according to aspect 10 is that it includes the following steps 1 and 2. Step 1: A step of carding the viscose rayon staple fiber of Embodiment 9 to produce a web. Step 2: A step of entangling the web obtained in Step 1 with a water stream.

According to the present invention, it is possible to improve the effect of reducing foaming caused by water used for hydroentangling, and to reduce the occurrence of cotton odor in viscose rayon.

(First embodiment)
Hereinafter, a first embodiment of the viscose rayon treatment agent (hereinafter referred to as "treatment agent") of the present invention will be described. The processing agent contains the following fatty acid derivatives, at least one selected from the following fatty acids and fats and oils, and an antioxidant. Fatty acid derivatives include compounds in which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of fatty acids having 12 to 24 carbon atoms, and 1 mol of compounds in which 4 mol to 50 mol of ethylene glycol is polymerized. It is at least one selected from ester compounds with 1 mol to 2 mol of fatty acids having 12 to 24 carbon atoms. The fatty acid is a fatty acid having 12 or more and 24 or less carbon atoms. The oil is at least one selected from vegetable oils, animal oils, and hydrogenated oils thereof. Furthermore, if necessary, a lubricant and/or an anionic surfactant may be contained.

<About fatty acid derivative (A)>
The fatty acid derivative (A) used in the treatment agent of this embodiment is a compound to which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of a fatty acid having 12 to 24 carbon atoms, and 4 mol of ethylene glycol. It is at least one selected from ester compounds of 1 mol or more of a polymerized compound of 50 mol or less and 1 mol or more and 2 mol or less of a fatty acid having 12 or more and 24 or less carbon atoms.

As the fatty acid to be used as a raw material for the fatty acid derivative (A), any known fatty acid can be used as appropriate, and it may be a saturated fatty acid or an unsaturated fatty acid. Further, it may be linear or may have a branched 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 that combine the above upper and lower limits arbitrarily are also envisioned.

The number of moles of ethylene oxide added is 1 mole or more and 30 moles or less, preferably 2 moles or more and 25 moles or less. Ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. Note that the number of moles of ethylene oxide added indicates the number of moles of ethylene oxide per mole of fatty acid as a raw material.

Specific examples of the fatty acid derivatives (A) include (1) a compound in which 20 moles of ethylene oxide is added to 1 mole of oleic acid; a compound in which 10 moles of ethylene oxide is added to 1 mole of oleic acid; A compound with 30 moles of ethylene oxide added to 1 mole of stearic acid, a compound with 5 moles of ethylene oxide added to 1 mole of stearic acid, a compound with 10 moles of ethylene oxide added to 1 mole of stearic acid, a compound with 1 mole of ethylene oxide added to 1 mole of stearic acid. On the other hand, polyoxyethylene alkyl (or alkylene) ester obtained by adding ethylene oxide to a saturated or unsaturated fatty acid such as a compound to which 10 moles of ethylene oxide has been added, (2) Compound 1 obtained by polymerizing 9 moles of ethylene glycol An ester compound of 1 mole of oleic acid and 1 mole of oleic acid, an ester compound of 1 mole of a compound obtained by polymerizing 14 moles of ethylene glycol and 2 moles of oleic acid, an ester compound of 1 mole of a compound obtained by polymerizing 23 moles of ethylene glycol and 1 mole of stearic acid. Saturated or unsaturated ester compounds, ester compounds of 1 mole of a compound obtained by polymerizing 9 moles of ethylene glycol and 2 moles of lauric acid, ester compounds of 1 mole of a compound obtained by polymerizing 23 moles of ethylene glycol and 2 moles of stearic acid, etc. Polyethylene glycol alkyl (or alkylene) ester obtained by addition reaction of polyethylene glycol to fatty acid, (3) compound in which 30 moles of ethylene oxide is added to 1 mole of castor oil, 10 moles of ethylene oxide to 1 mole of hydrogenated castor oil. Examples include esters of oil-derived fatty acids of polyoxyethylene obtained by addition reaction of ethylene oxide to naturally occurring fatty acids, such as compounds with molar addition of 10 moles of ethylene oxide per 1 mole of coconut fatty acid. .

As the fatty acid derivative (A), one type of fatty acid derivative may be used alone, or two or more types of fatty acid derivatives may be used in combination.
In the processing agent, the lower limit of the content of the fatty acid derivative (A) is preferably 30% by mass or more, more preferably 40% by mass or more. Further, the upper limit of the content of the fatty acid derivative (A) is preferably 95% by mass or less, more preferably 92% by mass or less. By specifying the content within this range, the effects of the present invention can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About fatty acids (B1) and fats and oils (B2)>
The fatty acid (B1) used in the treatment agent of this embodiment is a fatty acid having 12 or more and 24 or less carbon atoms. As the fatty acid having 12 or more carbon atoms and 24 or less carbon atoms, known fatty acids can be used as appropriate. It may be a saturated fatty acid or an unsaturated fatty acid. Furthermore, it may be linear or may have a branched structure. The number of carbon atoms in the fatty acid (B1) is 12 or more and 24 or less, preferably 12 or more and 22 or less. Ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. Specific examples of the fatty acid (B1) include lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, lignoceric acid, coconut fatty acid, and the like.

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

As the fatty acid (B1) and the fat or oil (B2), one type of fatty acid and/or fat may be used alone, or two or more types of fatty acid and/or fat may be used in combination.
In the processing agent, the lower limit of the content of at least one selected from fatty acids (B1) and fats and oils (B2) is preferably 0.01% by mass or more, more preferably 0.05% by mass or more. By specifying the content within this range, the effect of reducing foaming caused by shedding can be further improved. Further, the upper limit of the content ratio of such components is preferably 15% by mass or less, more preferably 10% by mass or less. By regulating the content within this range, emulsion stability can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About antioxidant (C)>
As the antioxidant (C) used in the treatment agent of this embodiment, any known antioxidant can be used as appropriate. Specific examples of the antioxidant (C) include (1) 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4 , 6-(1H,3H,5H)-trione, 1,3,5-tris(3',5'-di-t-butyl-4-hydroxybenzyl)isocyanuric acid, 1,3,5-tris(4 -t-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl) Benzene, 2,2'-methylene-bis(4-methyl-6-t-butylphenol), 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylpheny)butane, pentaerythritol tetrakis Phenolic antioxidants such as [3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate], (2) 4,4'-thiobis-(6-t-butyl-3) -methylphenol), dilauryl-3,3'-thiodipropionate, 2,2-bis({[3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl bis[3-(dodecylthio) ) propionate], thioether antioxidants such as ditridecane-1-yl 3,3'-sulfanediyl dipropanoate, (3) 3,9-bis(2,6-di-t-butyl-4- methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane, tris(mixed, mono and dinonylphenyl)phosphite, tris(2,3-di-t- butylphenyl) phosphite, 4,4'-butylidene-bis(3-methyl-6-t-butylphenyl-di-tridecyl) phosphite, 1,1,3-tris(2-methyl-4-di-tridecyl) phosphite, Decylphosphite-5-t-butylphenyl)butane, tris(2,4-di-t-butylphenyl)phosphite, bis(2,4-di-t-butylphenyl)pentaerythritol-di-phosphite, Tetrakis(2,4-di-t-butylphenyl)-4,4'-biphenylenephosphanite, bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol-di-phosphite, Tetrakis(2,4-di-t-butylphenyl) 4,4'-biphenylene diphosphonite, Tetratridecyl-4,4'-butylidene-bis-(2-t-butyl-5-methylphenol) diphosphite , triphenyl phosphite, diphenyldecyl phosphite, tridecyl phosphite, trioctyl phosphite, tridodecyl phosphite, triotadecyl phosphite, trinonylphenyl phosphite, tridodecyl trithiophosphite, octyldiphenyl phosphite, etc. Examples include antioxidants.

As the antioxidant (C), one type of antioxidant may be used alone, or two or more types of antioxidants may be used in combination. When using one kind of antioxidant alone, it is preferable to use a phenolic antioxidant or a thioether antioxidant. In the case of such a configuration, the effects of the present invention, particularly the effect of reducing cotton odor, can be further improved. When using two or more antioxidants in combination, it is preferable to use a phenolic antioxidant and a thioether antioxidant in combination. In the case of such a configuration, the effect of reducing cotton odor can be further improved.

The processing agent of the present embodiment is particularly limited in the content ratio of the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), and the antioxidant (C) in the processing agent. There isn't. If the total content of the fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), and the antioxidant (C) described above is 100 parts by mass, then the fatty acid derivative (A) is 5 parts by mass. 0.01 parts by mass to 10 parts by mass of at least one selected from fatty acids (B1) and fats and oils (B2), and 0.1 parts by mass of antioxidant (C) It is preferable that the content be greater than or equal to 10 parts by mass or less. In the case of such a configuration, the effects of the present invention can be further improved. In the present invention, the content ratio of the fatty acid derivative (A) is 80 parts by mass or more and 99.89 parts by mass or less.

In the treatment agent, the lower limit of the content of the antioxidant (C) is preferably 0.1% by mass or more, more preferably 0.15% by mass or more. By specifying the content within such a range, the effect of reducing cotton odor can be particularly improved. Further, the upper limit of the content of the antioxidant (C) is preferably 15% by mass or less, more preferably 10% by mass or less. By regulating the content within this range, emulsion stability can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. In the present invention, the content of the antioxidant (C) is 0.1% by mass or more and 10% by mass or less.

<About lubricant (D)>
The treatment agent (D) of the present embodiment may further contain at least one lubricant selected from hydrocarbon compounds, ester compounds (excluding the fatty acid derivatives (A) and oils and fats (B2)), and silicones. good. By blending this lubricant (D), the effects of the present invention, particularly the card passageability, can be further improved.

Specific examples of hydrocarbon compounds include mineral oil, paraffin wax, and the like.
Specific examples of ester compounds include ester compounds of aliphatic monoalcohols and aliphatic monocarboxylic acids such as butyl stearate and stearyl stearate, glycerin monooleate, glycerin trioleate, sorbitan monolaurate, and sorbitan trilaurate. , sorbitan monooleate, sorbitan trioleate, sorbitan monostearate, sorbitan tristearate, and other ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids. The ester compound used as a lubricant is a compound obtained by reacting a fatty acid with an alcohol, excluding the fatty acid derivative (A) and the oil (B2).

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

The processing agent of this embodiment includes the above-mentioned fatty acid derivative (A) in the processing agent, at least one selected from fatty acids (B1) and fats and oils (B2), an antioxidant (C), and a lubricant (D). When containing, there is no particular restriction on the content ratio of these. When the total content of at least one selected from the fatty acid derivative (A), the fatty acid (B1), and the oil (B2), the antioxidant (C), and the lubricant (D) described above is 100 parts by mass, the fatty acid Derivative (A) from 5 parts by mass to 98.89 parts by mass, at least one selected from fatty acids (B1) and fats and oils (B2) from 0.01 parts by mass to 10 parts by mass, and antioxidant (C). Preferably, the lubricant (D) is contained in a proportion of 0.1 part by mass or more and 10 parts by mass or less, and a lubricant (D) in a proportion of 1 part by mass or more and 20 parts by mass or less. In the case of such a configuration, the effects of the present invention can be further improved. In the present invention, the content ratio of the fatty acid derivative (A) is 60 parts by mass or more and 98.89 parts by mass or less.

In the processing agent, the lower limit of the content of the lubricant (D) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying the content within such a range, it is possible to particularly improve card passage performance. Further, the upper limit of the content of the lubricant (D) is preferably 25% by mass or less, more preferably 20% by mass or less. By regulating the content within this range, emulsion stability can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About anionic surfactant (E)>
The processing agent of this embodiment may further contain an anionic surfactant (E). By blending this anionic surfactant (E), the effects of the present invention, particularly the emulsion stability when the processing agent is prepared into an aqueous liquid, can be further improved.

As the anionic surfactant (E), any known one can be used as appropriate. Specific examples of the anionic surfactant (E) include (1) phosphorus of aliphatic alcohols such as lauryl phosphate, cetyl phosphate, octyl phosphate, oleyl phosphate, and stearyl phosphate; acid ester salts, (2) aliphatic alcohols such as polyoxyethylene lauryl ether phosphate ester salts, polyoxyethylene oleyl ether phosphate ester salts, and polyoxyethylene stearyl ether phosphate ester salts selected from ethylene oxide and propylene oxide; Phosphoric ester salts of products to which at least one alkylene oxide has been added, (3) lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecane sulfonate, dodecylbenzene sulfone acid salts, aliphatic sulfonates or aromatic sulfonates such as secondary alkylsulfonic acid (C13-15) salts, (4) aliphatic alcohols such as lauryl sulfate, oleyl sulfate, and stearyl sulfate; (5) Polyoxyethylene lauryl ether sulfate, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate, polyoxyethylene oleyl ether sulfate, etc. sulfate ester salt of a product to which at least one alkylene oxide selected from oxide and propylene oxide is added, (6) castor oil fatty acid sulfate ester salt, sesame oil fatty acid sulfate ester salt, tall oil fatty acid sulfate ester salt, soybean oil fatty acid sulfate ester salt, rapeseed oil Fatty acid sulfate ester salts, palm oil fatty acid sulfate ester salts, lard fatty acid sulfate ester salts, beef tallow fatty acid sulfate ester salts, whale oil fatty acid sulfate ester salts, etc. (7) Castor oil sulfate ester salts, sesame oil sulfuric ester salts Ester salts, tall oil sulfate ester salts, soybean oil sulfate ester salts, rapeseed oil sulfate ester salts, palm oil sulfate ester salts, lard sulfate ester salts, beef tallow sulfate ester salts, whale oil sulfate ester salts, etc. Examples include sulfuric acid ester salts of fats and oils, (8) fatty acid salts such as laurate, oleate, and stearate, and (9) sulfosuccinic acid ester salts of aliphatic alcohols such as dioctyl sulfosuccinate. 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.

As the anionic surfactant (E), one type of anionic surfactant may be used alone, or two or more types of anionic surfactants may be used in combination.
The processing agent of this embodiment contains the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), an antioxidant (C), and an anionic surfactant ( When E) is contained, there is no particular restriction on the content ratio thereof. When the total content of at least one selected from the fatty acid derivative (A), fatty acid (B1), and oil or fat (B2), the antioxidant (C), and the anionic surfactant (E) mentioned above is 100 parts by mass. , 5 parts by mass or more and 98.89 parts by mass or less of a fatty acid derivative (A), 0.01 parts by mass or more and 10 parts by mass or less of at least one selected from fatty acids (B1) and fats and oils (B2), and an antioxidant (C ) in a proportion of 0.1 part by mass or more and 10 parts by mass or less, and an anionic surfactant (E) in a proportion of 1 part by mass or more and 20 parts by mass or less. In the case of such a configuration, the effects of the present invention can be further improved. In the present invention, the content ratio of the fatty acid derivative (A) is 60 parts by mass or more and 98.89 parts by mass or less.

In addition, the processing agent of the present embodiment includes the above-mentioned fatty acid derivative (A) in the processing agent, at least one selected from fatty acids (B1) and fats and oils (B2), an antioxidant (C), and a lubricant ( D) and an anionic surfactant (E), there are no particular restrictions on their content ratios. The total content of at least one selected from the fatty acid derivatives (A), fatty acids (B1), and fats and oils (B2) mentioned above, the antioxidant (C), the lubricant (D), and the anionic surfactant (E). is 100 parts by mass, the fatty acid derivative (A) is 5 parts by mass or more and 97.89 parts by mass or less, and at least one selected from fatty acids (B1) and fats and oils (B2) is 0.01 parts by mass and 10 parts by mass or less. , antioxidant (C) from 0.1 parts by mass to 10 parts by mass, lubricant (D) from 1 part by mass to 20 parts by mass, and anionic surfactant (E) from 1 part by mass to 20 parts by mass. It is preferable to contain the following proportions. In the case of such a configuration, the effects of the present invention can be further improved. In the present invention, the content ratio of the fatty acid derivative (A) is 40 parts by mass or more and 97.89 parts by mass or less.

In the processing agent, the lower limit of the content of the anionic surfactant (E) is preferably 0.1% by mass or more, more preferably 1% by mass or more. By specifying the content within such a range, emulsion stability in particular can be further improved. Further, the upper limit of the content of the anionic surfactant (E) is preferably 25% by mass or less, more preferably 20% by mass or less. By specifying the content within this range, the effect of reducing foaming caused by shedding can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

<About other ingredients>
The processing agent of the present embodiment may further contain nonionic surfactants, polyhydric alcohols, etc. other than those mentioned above as other components within a range that does not impede the effects of the present invention.

Specific examples of nonionic surfactants include: (1) polyoxyalkylene alkyl (or alkenyl) ethers obtained by addition reaction of alkylene oxide to saturated or unsaturated aliphatic monohydric alcohols, such as a compound obtained by adding 10 moles of ethylene oxide to 1 mole of lauryl alcohol, a compound obtained by adding 5 moles of ethylene oxide to 1 mole of stearyl alcohol, a compound obtained by adding 30 moles of ethylene oxide to 1 mole of oleyl alcohol, a compound obtained by adding 10 moles of ethylene oxide to 1 mole of C12-13 alcohol, a compound obtained by randomly adding 10 moles each of ethylene oxide and propylene oxide to 1 mole of lauryl alcohol, a compound obtained by randomly adding 6 moles of ethylene oxide and 2 moles of propylene oxide to 1 mole of C12-13 alcohol, a compound obtained by adding 5 moles of ethylene oxide to 1 mole of isodecyl alcohol, and then adding 5 moles of propylene oxide, and a compound obtained by adding 2 moles of propylene oxide to 1 mole of isodecyl alcohol, and then adding 5 moles of ethylene oxide, and (2) polyoxyalkylene alkyl (or alkenyl) ethers obtained by adding 10 moles of ethylene oxide to 1 mole of sorbitol. (3) polyoxyalkylene polyhydric alcohol ethers obtained by addition reaction of alkylene oxide to aliphatic polyhydric alcohols such as a compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitol and then adding 1 mole of lauric acid, a compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitol and then adding 1 mole of oleic acid, a compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitol and then adding 1 mole of stearic acid, and a compound obtained by adding 20 moles of ethylene oxide to 1 mole of sorbitol and then adding 3 moles of stearic acid; Examples of the polyoxyalkylene alkylphenol ether include polyoxyalkylene alkylphenol ethers obtained by addition reaction of alkylene oxide with alkylphenols such as (1) a compound having 10 moles of ethylene oxide added to nonylphenol, and (2) a compound having 5 moles of ethylene oxide added to octylamine, a compound having 8 moles of ethylene oxide added to laurylamine, and a compound having 20 moles of ethylene oxide added to stearylamine. In addition, when two or more types of alkylene oxide are used, the addition form may be any of block addition, random addition, and a combination of block addition and random addition, and is not particularly limited.

Specific examples of polyhydric alcohols include ethylene glycol, propylene glycol, pentanediol, hexanediol, glycerin, pentaerythritol, sorbitol, sorbitan, polyethylene glycol, polypropylene glycol, and a reaction product of propylene glycol and alkylene oxide.

These other components may be used alone or in combination of two or more.
The content of these other components in the processing agent is preferably 50% by mass or less, more preferably 10% by mass or less, still more preferably 1% by mass or less, from the viewpoint of not impeding the effects of the present invention.

The viscose rayon to which the treatment agent of this embodiment is applied may be long fibers generally called filaments or short fibers generally called staples. Preferably, the fibers are short fibers. The length of the short fibers in this embodiment is not particularly limited as long as it corresponds to short fibers in this technical field, but for example, it is preferably 100 mm or less, and more preferably 51 mm or less.

According to the first embodiment, the following effects can be obtained.
(1) The processing agent of this embodiment contains the above-mentioned fatty acid derivative (A), at least one selected from fatty acids (B1) and fats and oils (B2), and an antioxidant (C), and the processing agent contains The content of antioxidant in is 0.1% by mass or more and 10% by mass or less . Therefore, when the viscose rayon to which the treatment agent is attached is hydroentangled, the effect of reducing foaming caused by water used for hydroentangling can be improved. Thereby, operational efficiency can be improved in the spunlace nonwoven fabric production process. Furthermore, it is possible to reduce the occurrence of cotton odor from viscose rayon to which the treatment agent is attached. Furthermore, discoloration of viscose rayon cotton to which the treatment agent is attached can be reduced. Further, the card passing property when passing the viscose rayon to which the processing agent is attached through the card machine can be improved. Furthermore, the emulsion stability can be improved when the treatment agent is prepared as an aqueous liquid.

(Second embodiment)
Next, a second embodiment embodying the viscose rayon according to the present invention will be described. The treatment agent of the first embodiment is attached to the viscose rayon of this embodiment.

As a method for applying the treatment agent, known methods such as a dipping method, a spray method, a shower method, a roller method, a dropping/flowing method, etc. can be applied. Further, the process of adhering is not particularly limited, but includes, for example, a post-refining process, a spinning process, and the like.

The viscose rayon treated with the treatment agent of this embodiment can be the one described above.
Examples of the form of the treatment agent when it is applied to viscose rayon include an aqueous liquid and an organic solvent solution. In the method for treating viscose rayon, it is preferable to dilute the treatment agent of the first embodiment with water to form an aqueous liquid with a concentration of 0.5 to 20% by mass, and to apply this aqueous liquid to the viscose rayon. . It is preferable that the amount of the treatment agent deposited is such that the solid content excluding solvent is 0.1 to 1% by mass based on the viscose rayon.

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

Spunlace nonwoven fabric is manufactured by sequentially passing through a web forming process (step 1) in which a web is manufactured by carding viscose rayon, and a hydroentangling process (step 2) in which the web is entangled with a water stream. .

(Web forming process)
The web forming process is a process of carding the viscose rayon to which the above treatment agent has been adhered to produce a web. Carding can be performed using a known card machine. Examples include flat cards, combination cards, and roller cards.

(hydraulic entanglement process)
The hydroentangling step is a step of entangling the web obtained in the web forming step with a water stream. The web is irradiated with a high-pressure water stream, and the pressure of the water stream intertwines the fibers to form a sheet. After performing the hydroentangling step, a drying step and a winding step may be performed as appropriate.

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

The first to third embodiments can be implemented with the following modifications. The first to third embodiments and the following modified examples can be implemented in combination with each other within a technically consistent range.

・The processing agent of the above embodiment may contain surfactants other than those mentioned above to maintain the quality of the processing agent, antistatic agents, binders, Components commonly used in processing agents such as ultraviolet absorbers and pH adjusters may be further blended.

Examples will be given below to make the structure and effects of the present invention more concrete. The invention is not limited to these examples.
Test Category 1 <Preparation of treatment agent>
(Example 1)
The following materials were used as raw materials for the processing agent. Note that the numerical values of each component shown in Table 1 indicate the content in the processing agent.

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 (a phenolic antioxidant) 4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione, and a thioether antioxidant. Ditridecane-1-yl = 3,3'-sulfanediyl dipropanoate Lubricant (D): Stearyl stearate Anionic surfactant (E): Potassium lauryl phosphate ester The content ratios shown in Table 1 should be achieved. 900 parts of water was added to 100 parts of the treatment agent prepared in 1, and stirred at 50° C. to prepare a 10% aqueous solution containing 10% by mass of the treatment agent.

(Examples 2 to 24 and Comparative Examples 1 to 6)
The processing agents of Examples 2 to 24 and Comparative Examples 1 to 6 were prepared in the same manner as in the preparation of the processing agent and its aqueous solution in Example 1, and 10% aqueous solutions thereof were prepared.

Table 1 summarizes the contents of the processing agents of each example prepared above. The processing agents of Examples 3 to 4, 6, 8, and 24 and Comparative Examples 1 to 2, and 6 contain a nonionic surfactant and/or a polyhydric alcohol as other components. In Example 24 of Table 1, the content of other components (parts by mass (*)) is shown as parts by mass based on a total of 100 parts by mass of components (A) to (E).

Type and content of fatty acid derivative (A), type and content of fatty acid (B1) or oil (B2), type and content of antioxidant (C), type and content of lubricant (D), anion The type and content of surfactant (E) and the type and content of other components are listed in the "Fatty acid derivative (A)" column, "Fatty acid, oil (B)" column, and "Antioxidant (C)" column of Table 1. ” column, “Lubricant (D)” column, “Anionic surfactant (E)” column, and “Other components” column, respectively.

Details of the fatty acid derivative (A), fatty acid (B1) or oil (B2), antioxidant (C), lubricant (D), anionic surfactant (E), and other ingredients listed in Table 1 are as follows. It is.

(Fatty acid derivative (A))
A-1: Compound with 20 moles of ethylene oxide added to 1 mole of oleic acid A-2: Compound with 5 moles of ethylene oxide added to 1 mole of stearic acid A-3: Ethylene oxide to 1 mole of stearic acid A-4: Ester compound of 1 mole of a compound obtained by polymerizing 9 moles of ethylene glycol and 2 moles of lauric acid A-5: 1 mole of a compound obtained by polymerizing 23 moles of ethylene glycol and 2 moles of stearic acid A-6: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of coconut fatty acid A-7: An ester compound of 1 mole of a compound obtained by polymerizing 14 moles of ethylene glycol and 2 moles of oleic acid A- 8: Compound in which 10 moles of ethylene oxide is added to 1 mole of oleic acid A-9: Compound in which 30 moles of ethylene oxide is added to 1 mole of oleic acid A-10: Compound 1 in which 9 moles of ethylene glycol is polymerized Ester compound of 1 mole of oleic acid (fatty acid (B1) or fat (B2))
B-1: Beef tallow B-2: Stearic acid B-3: Palmitic acid B-4: Coconut oil B-5: Palm oil B-6: Behenic acid B-7: Palm hydrogenated oil B-8: Castor hydrogenated oil B-9: Castor oil B-10: Oleic acid B-11: Pork fat B-12: Lauric acid B-13: Coconut fatty acid (antioxidant (C))
C-1: phenolic antioxidant 1,3,5-tris(4-t-butyl-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazine-2,4,6 -(1H,3H,5H)-trione C-2: Phenolic antioxidant pentaerythritol tetrakis [3-(3',5'-di-t-butyl-4'-hydroxyphenyl)propionate]
C-3: Phosphorous antioxidant 3,9-bis(2,6-di-t-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5 .5] Undecane C-4: Ditridecan-1-yl 3,3'-sulfanediyl dipropanoate, a thioether antioxidant C-5: 2,2-bis({ [3-(dodecylthio)propionyl]oxy}methyl)-1,3-propanediyl bis[3-(dodecylthio)propionate]
(Lubricant (D))
D-1: Stearyl stearate D-2: Mineral oil (viscosity 500 seconds)
D-3: Dimethyl silicone D-4: Mineral oil (viscosity 180 seconds)
D-5: Amino silicone D-6: Paraffin wax D-7: Mineral oil (viscosity 60 seconds)
D-8: Glycerin monooleate D-9: Mineral oil (viscosity 80 seconds)
D-10: Sorbitan tristearate D-11: Sorbitan monostearate (anionic surfactant (E))
E-1: Lauryl phosphate potassium salt E-2: Dioctylsulfosuccinate sodium salt E-3: Tetradecane sulfonate sodium salt E-4: Sodium oleate E-5: Beef tallow sulfate ester sodium salt E-6: Stearin Potassium acid (other ingredients)
F-1: A compound in which 5 moles of ethylene oxide are added to 1 mole of stearyl alcohol F-2: A compound in which 6 moles of ethylene oxide and 2 moles of propylene oxide are randomly added to 1 mole of C12-13 alcohol F-3: Compound in which 5 moles of ethylene oxide was added to 1 mole of isodecyl alcohol, and then 5 moles of propylene oxide was added. F-4: After adding 2 moles of propylene oxide to 1 mole of isodecyl alcohol, ethylene oxide was added. Compound to which 5 mol of ethylene oxide was added F-5: Compound to which 20 mol of ethylene oxide was added to 1 mol of sorbitol, and then 1 mol of stearic acid was added F-6: 20 mol of ethylene oxide was added to 1 mol of sorbitol After addition, 3 moles of stearic acid was added to the compound F-7: Compound to which 8 moles of propylene glycol was polymerized F-8: Compound to which 45 moles of ethylene glycol was polymerized Test category 2 Adhesion of treatment agent>
The 10% aqueous solution of each treatment agent prepared in Test Section 1 was further diluted with water to prepare a 0.2% aqueous emulsion (% by mass). The aqueous emulsion of each example was applied to viscose rayon fibers with a fineness of 1.3 x 10 ^-4 g/m (1.2 denier) and a fiber length of 38 mm so that the adhesion amount (excluding the solvent) was 0.2% by mass. It was attached by spray lubrication. After drying in a hot air dryer at 80° C. for 2 hours, the fibers were conditioned overnight in an atmosphere of 25° C. and 40% RH to obtain viscose rayon fibers to which the treatment agent was attached.

Test Category 3 <Evaluation of treatment agent>
(Evaluation test)
Using the viscose rayon fibers to which the treatment agent was attached, tests were conducted including a shedding foaming property test, a cotton odor test, a cotton discoloration test, a card passage test, and an emulsion stability test. The procedure for each test is shown below. Further, the results of each test are shown in Table 2.

(Shedding foaming test)
First, 20 g of viscose rayon fibers to which the treatment agent was attached were added to 150 g of water, and after 15 minutes, the treated cotton was squeezed using a hand juicer. 10 g of this squeezing fluid was placed in a 25 ml measuring cylinder with a stopper and vigorously shaken for 30 seconds. After leaving it to stand still for 30 seconds, it was vigorously shaken again for 30 seconds. After allowing it to stand for 5 minutes, the height from the water surface to the top of the bubbles was measured. The results are shown in the "Shedding Foaming Test" column of Table 2.

Evaluation criteria for shedding foaming test ◎ (Good); Height from the water surface to the top of the bubbles is less than 1 mm ○ (Acceptable); Height from the water surface to the top of the bubbles is 1 mm or more and less than 2 mm × (Not acceptable); The height from the water surface to the top of the bubbles is 2 mm or more (cotton odor test)
20 g of viscose rayon fibers to which the treatment agent was attached were placed in 150 g of water, and after being sealed for 30 minutes, the odor was smelled. The cotton odor test was conducted on 10 testers. The results are shown in the "Cotton Odor Test" column of Table 2.

Evaluation criteria for cotton odor test ◎◎ (Excellent); No one judged that there was odor ◎ (Good); 1 to 2 people judged that there was odor ○ (Acceptable); 3 to 5 people judged that there was odor × (Unsatisfactory) ; 6 or more people judged it to have an odor (cotton discoloration test)
It was determined whether or not the viscose rayon fiber to which the treatment agent was applied had yellowed or other discoloration compared to before the treatment agent was applied. The cotton discoloration test was conducted on 10 testers. The results are shown in the "Cotton discoloration test" column of Table 2.

Evaluation criteria for cotton discoloration test ◎◎ (Excellent); No one judged that there was discoloration ◎ (Good); 1 to 2 people judged that there was discoloration ○ (Acceptable); 3 to 5 people judged that there was discoloration × (Unacceptable) ; 6 or more people judged that there was discoloration (evaluation of card passability)
20 g of viscose rayon fiber to which the treatment agent was attached was conditioned for 24 hours in a thermostatic chamber at 20° C. and 65% RH, and then applied to a miniature card machine. The ratio of discharge to input was calculated and evaluated using the following evaluation criteria. The results are shown in the "Card Passability Test" column of Table 2.

Evaluation criteria for card passability ◎ (Good): Emission amount is 90% or more ○ (Acceptable): Emission amount is 80% or more and less than 90% × (Unacceptable): Emission amount is less than 80% (Evaluation of emulsification stability)
100 g of the 10% aqueous solution of each treatment agent prepared in Test Section 1 was placed in a 100 ml carrot-type sedimentation bottle and allowed to stand at 25°C. After 24 hours, the amount of precipitate was confirmed and evaluated using the following evaluation criteria. The results are shown in the "Emulsification Stability Test" column of Table 2.

Evaluation criteria for emulsion stability ◎ (good); precipitation amount is 0.1 ml or less ○ (acceptable); precipitation amount is more than 0.1 ml and less than 0.5 ml × (impossible); precipitation amount is more than 0.5 ml

As is clear from the results in Table 2, the treatment agent of the present invention has the effect of improving the effect of reducing foaming caused by water used in hydroentangling. Further, there is an effect that the cotton odor of the fibers to which the treatment agent is attached can be reduced.

Claims (10)

A treatment agent for viscose rayon, characterized by containing the following fatty acid derivatives, at least one selected from the following fatty acids and fats and oils, and an antioxidant.
Fatty acid derivatives: Compounds in which ethylene oxide is added at a ratio of 1 mol to 30 mol to 1 mol of fatty acids having 12 to 24 carbon atoms, and 1 mol of compounds polymerized with 4 mol to 50 mol of ethylene glycol and carbon. At least one selected from ester compounds with 1 mol or more and 2 mol or less of a fatty acid having a number of 12 or more and 24 or less.
Fatty acid: Fatty acid having 12 or more and 24 or less carbon atoms.
Fat: At least one selected from vegetable oil, animal oil, and hydrogenated oil. When the total content ratio of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, and the antioxidant is 100 parts by mass,
The fatty acid derivative is 5 parts by mass or more and 99.89 parts by mass or less, at least one selected from the fatty acid and the oil or fat is 0.01 part by mass or more and 10 parts by mass or less, and the antioxidant is 0.1 part by mass or more. The treatment agent for viscose rayon according to claim 1, containing the agent in a proportion of 10 parts by mass or less. The treatment agent for viscose rayon according to claim 1, further comprising at least one selected from the following lubricants and anionic surfactants.
Lubricant: at least one selected from hydrocarbon compounds, ester compounds (excluding the oils and fats and fatty acid derivatives), and silicones. The fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the lubricant,
When the total content of the fatty acid derivative, 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 5 parts by mass or more and 98.89 parts by mass or less, at least one selected from the fatty acid and the oil or fat is 0.01 part by mass or more and 10 parts by mass or less, and the antioxidant is 0.1 part by mass or more and 10 parts by mass or less. The treatment agent for viscose rayon according to claim 3, which contains the lubricant in a proportion of 1 part by mass or more and 20 parts by mass or less. The fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the anionic surfactant,
When the total content of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, and the anionic surfactant is 100 parts by mass,
The fatty acid derivative is 5 parts by mass or more and 98.89 parts by mass or less, at least one selected from the fatty acid and the oil or fat is 0.01 part by mass or more and 10 parts by mass or less, and the antioxidant is 0.1 part by mass or more and 10 parts by mass or less. The treatment agent for viscose rayon according to claim 3, which contains the anionic surfactant in a proportion of 1 part by mass or more and 20 parts by mass or less. The fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, the lubricant, and the anionic surfactant,
When the total content of the fatty acid derivative, at least one selected from the fatty acid and the oil and fat, the antioxidant, the lubricant, and the anionic surfactant is 100 parts by mass,
The fatty acid derivative is 5 parts by mass or more and 97.89 parts by mass or less, at least one selected from the fatty acid and the oil or fat is 0.01 part by mass or more and 10 parts by mass or less, and the antioxidant is 0.1 part by mass or more and 10 parts by mass or less. The treatment agent for viscose rayon according to claim 3, which contains the lubricant in a proportion of 1 part by mass or more and 20 parts by mass or less, and the anionic surfactant in a proportion of 1 part by mass or more and 20 parts by mass or less. The processing agent for viscose rayon according to any one of claims 1 to 6, wherein the viscose rayon is viscose rayon staple fiber. A viscose rayon coated with the viscose rayon treatment agent according to any one of claims 1 to 6. Viscose rayon short fibers, characterized in that the viscose rayon processing agent according to any one of claims 1 to 6 is attached. A method for producing a spunlace nonwoven fabric, comprising the following steps 1 and 2.
Step 1: A step of carding the viscose rayon short fibers according to claim 9 to produce a web.
Step 2: A step of entangling the web obtained in Step 1 with a water stream.