Treating agent for spunlace of rayon, composition containing treating agent for spunlace of rayon, first treating agent for spunlace of rayon, composition containing first treating agent for spunlace of rayon, and method for producing spunlace nonwoven fabric

Abstract

The present invention addresses the problem of providing a treatment agent for rayon spunlace and the like capable of reducing the deterioration of water shedding and blistering in a spunlace step of fibers to which the treatment agent for rayon spunlace is applied, even when the drying temperature is high in a fiber drying step performed prior to a carding process. This treatment agent for spunlace of rayon contains: a nonionic surfactant (X) containing a specific ether monoester derivative (A) and a specific ether diester derivative (B); and a specific fatty acid (D) or polyol (E).

Description

Technical Field

[0001] The present invention relates to a rayon spunlace treatment agent capable of reducing the deterioration of water shedding and foaming in the spunlace step of fibers treated with a rayon spunlace treatment agent, a composition containing the rayon spunlace treatment agent, a first rayon spunlace treatment agent, a composition containing the first rayon spunlace treatment agent, and a method for manufacturing a spunlace nonwoven fabric. Background Art

[0002] Raw material fibers used for nonwoven fabrics are known to include natural fibers such as cotton fibers, regenerated fibers such as rayon, and synthetic resins such as polyolefins. Among them, from the viewpoints of excellent biodegradability, hygroscopicity, and water absorbency, regenerated fibers made from pulp, cotton linters, etc., that is, rayon, have attracted attention. When manufacturing a spunlace nonwoven fabric using rayon, in order to impart various properties such as carding passability, a treatment of attaching a rayon spunlace treatment agent containing a surfactant, etc. may be performed on the surface of the raw material fibers.

[0003] Currently, there is known a rayon spunlace treatment agent disclosed in Patent Documents 1 and 2. Patent Document 1 discloses a treatment agent for short fibers, which contains a fatty acid derivative having a structure formed by adding an alkylene oxide to a fatty acid, at least one selected from fatty acids and oils, and a polyol. Patent Document 2 discloses a fiber treatment agent for spunlace, which contains a polyoxyalkylene derivative formed by adding ethylene oxide to a fatty acid, and a functional imparting agent for a specified fatty acid and / or oil. Prior Art Documents Patent Documents

[0004] Patent Document 1: Japanese Patent No. 6533020 Gazette Patent Document 2: Japanese Patent No. 6132966 Gazette Summary of the Invention Problems to be Solved by the Invention

[0005] However, the conventional rayon spunlace treatment agents have the following problems: When fibers treated with a rayon spunlace treatment agent pass through the spunlace step, the water used in the spunlace step is prone to shedding and foaming (that is, the water used for water entanglement is easily foamed due to the treatment agent falling off from the fibers being mixed in). In particular, when the drying temperature in the fiber drying step before the carding process is high, the shedding and foaming of water in the spunlace step deteriorate, causing problems. Means for Solving the Problems

[0006] The present inventors conducted research to solve the above problems and found that a composition in which a specified ether monoester derivative (A) and ether diester derivative (B) are used in combination in a rayon spunlace treatment agent has particularly good effects. Descriptions are given for various methods for solving the above problems.

[0007] The rayon spunlace treating agent of Method 1 is characterized by containing a nonionic surfactant (X) and the following fatty acids (D). The nonionic surfactant (X) includes the following ether monoester derivative (A) and the following ether diester derivative (B). The ether monoester derivative (A) is a compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms. The ether diester derivative (B) is a compound formed by esterifying a compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, excluding polyethylene glycol dilaurate. The fatty acids (D) are at least one selected from fatty acids having 12 or more and 24 or less carbon atoms and oils and fats.

[0008] The rayon spunlace treating agent of Method 2 contains a nonionic surfactant (X) and a polyol (E) excluding esters. The nonionic surfactant (X) includes the following ether monoester derivative (A) and the following ether diester derivative (B). The ether monoester derivative (A) is a compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms. The ether diester derivative (B) is a compound formed by esterifying a compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, excluding polyethylene glycol dilaurate.

[0009] Method 3 is a rayon spunlace treating agent as in Method 1 or 2, wherein when the total content ratio of the ether monoester derivative (A) and the ether diester derivative (B) is set to 100 parts by mass, it contains 10 parts by mass or more and 90 parts by mass or less of the ether monoester derivative (A), and 10 parts by mass or more and 90 parts by mass or less of the ether diester derivative (B).

[0010] Method 4 is a rayon spunlace treating agent as in Method 1, which further contains an anionic surfactant (C). Method 5 is a treatment agent for rayon spunlace as in Method 1, which further contains an anionic surfactant (C); when the total content ratio of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), and the above-mentioned anionic surfactant (C) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether diester derivative (B), and 0.1 part by mass or more and 20 parts by mass or less of the above-mentioned anionic surfactant (C).

[0011] Method 6 is a treatment agent for rayon spunlace as in Method 1, which further contains an anionic surfactant (C); when the total content ratio of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), and the above-mentioned fatty acids (D) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether diester derivative (B), 0.1 part by mass or more and 20 parts by mass or less of the above-mentioned anionic surfactant (C), and 0.1 part by mass or more and 10 parts by mass or less of the above-mentioned fatty acids (D).

[0012] Method 7 is a treatment agent for rayon spunlace as in Method 1, which further contains an anionic surfactant (C) and a polyol (E) excluding esters; when the total content ratio of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), the above-mentioned fatty acids (D), and the above-mentioned polyol (E) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether diester derivative (B), 0.1 part by mass or more and 20 parts by mass or less of the above-mentioned anionic surfactant (C), 0.1 part by mass or more and 10 parts by mass or less of the above-mentioned fatty acids (D), and 0.1 part by mass or more and 70 parts by mass or less of the above-mentioned polyol (E).

[0013] Method 8 is a treatment agent for rayon spunlace as in Method 1, 2, or 4, which further contains the following lubricant (F). The lubricant (F) is at least one selected from hydrocarbons, esters excluding oils and fats, and silicones.

[0014] Method 9 is a treatment agent for rayon spunlace as in Method 1, which further contains an anionic surfactant (C), a polyol (E) excluding esters, and the following lubricant (F); when the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), the above-mentioned fatty acids (D), the above-mentioned polyol (E), and the above-mentioned lubricant (F) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether diester derivative (B), 0.1 part by mass or more and 20 parts by mass or less of the above-mentioned anionic surfactant (C), 0.1 part by mass or more and 10 parts by mass or less of the above-mentioned fatty acids (D), 0.1 part by mass or more and 70 parts by mass or less of the above-mentioned polyol (E), and 1 part by mass or more and 20 parts by mass or less of the above-mentioned lubricant (F). The lubricant (F) is at least one selected from hydrocarbons, esters excluding fats and oils, and silicone.

[0015] Method 10 is a treatment agent for rayon spunlace as in Method 1, which is composed of a first treatment agent for rayon spunlace and a second treatment agent for rayon spunlace; the above-mentioned first treatment agent for rayon spunlace contains the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), and the above-mentioned fatty acids (D), and further optionally contains the following lubricant (F); the above-mentioned second treatment agent for rayon spunlace contains at least one selected from an anionic surfactant (C) and a polyol (E) excluding esters. The lubricant (F) is at least one selected from hydrocarbons, esters excluding fats and oils, and silicone.

[0016] A composition containing a treatment agent for rayon spunlace according to Method 11 contains the treatment agent for rayon spunlace according to any one of Methods 1 to 10 and the following solvent (S); when the total of the content ratios of the above-mentioned treatment agent for rayon spunlace and the above-mentioned solvent (S) is set to 100 parts by mass, it contains 10 parts by mass or more and 99.99 parts by mass or less of the above-mentioned treatment agent for rayon spunlace and 0.01 part by mass or more and 90 parts by mass or less of the above-mentioned solvent (S). The solvent (S) has a boiling point of 105°C or less at atmospheric pressure.

[0017] Method 12 is a composition containing a treatment agent for rayon spunlace as in Method 11, wherein the above-mentioned solvent (S) is water. The first treating agent for rayon spunlace of Method 13 is characterized in that it is used in combination with the second treating agent for rayon spunlace or a composition containing the second treating agent for rayon spunlace; the second treating agent for rayon spunlace contains at least one selected from anionic surfactants (C) and polyols (E) excluding esters; the composition containing the second treating agent for rayon spunlace contains the second treating agent for rayon spunlace and the following solvent (S); the first treating agent for rayon spunlace contains the following ether monoester derivative (A), the following ether diester derivative (B), and the following fatty acids (D), and further optionally contains the following lubricant (F). The ether monoester derivative (A) is a compound obtained by adding a total of 1 mole or more and 30 moles or less of alkylene oxides having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms. The ether diester derivative (B) is a compound obtained by esterifying a compound obtained by adding a total of 1 mole or more and 30 moles or less of alkylene oxides having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, excluding polyethylene glycol dilaurate. The fatty acids (D) are at least one selected from fatty acids having 12 or more and 24 or less carbon atoms and oils and fats. The lubricant (F) is at least one selected from hydrocarbons, esters excluding oils and fats, and silicones. The solvent (S) has a boiling point of 105°C or less at atmospheric pressure.

[0018] The composition containing the first treating agent for rayon spunlace of Method 14 is characterized in that it contains the first treating agent for rayon spunlace of Method 13 and the following solvent (S). The solvent (S) is a solvent having a boiling point of 105°C or less at atmospheric pressure.

[0019] The method for manufacturing a spunlace nonwoven fabric of Method 15 is characterized by the following steps 1 to 3. Step 1 is a step of attaching the treating agent for rayon spunlace according to any one of Methods 1 to 10 to rayon. Step 2 is a step of using the rayon obtained in Step 1 in a carding process to manufacture a card web. Step 3 is a step of entangling the card web obtained in Step 2 with water flow to obtain a spunlace nonwoven fabric. Advantages of the Invention

[0020] According to the present invention, even when the drying temperature in the drying step of the fibers before the carding process is high, it is possible to reduce the deterioration of water shedding and foaming of water in the spunlace step when using fibers to which the treating agent for rayon spunlace is imparted. Detailed Embodiments

[0021] <First Embodiment> The following describes a first embodiment in which the treatment agent for rayon hydroentangling of the present invention (hereinafter referred to as the treatment agent) is embodied. The treatment agent of this embodiment contains a nonionic surfactant (X), which includes a specified ether monoester derivative (A) and a specified ether diester derivative (B).

[0022] (Nonionic surfactant (X)) The nonionic surfactant (X) used in the treatment agent of this embodiment contains a specified ether monoester derivative (A) and a specified ether diester derivative (B) as essential components. By using the following ether monoester derivative (A) and ether diester derivative (B) in combination, even when the drying temperature in the fiber drying step before the carding process is relatively high, it is possible to reduce the deterioration of water shedding and foaming of the fiber treated with the treatment agent in the hydroentangling step.

[0023] (Ether monoester derivative (A)) The ether monoester derivative (A) used in this embodiment is a compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms. The ether monoester derivative (A) has a monoester structure in which a fatty acid is bonded to one end of a polyoxyalkylene chain formed by polymerization of an alkylene oxide having 2 or 3 carbon atoms to form an ester bond.

[0024] As the fatty acid used as the raw material of the ether monoester derivative (A), those known in the art can be appropriately used, and it can be a saturated fatty acid or an unsaturated fatty acid. In addition, it can be linear or have a branched structure.

[0025] Specific examples of the fatty acid include, for example, (1) fatty acids having a monovalent linear alkyl group such as dodecanoic acid (lauric acid), tetradecanoic acid (myristic acid), hexadecanoic acid (palmitic acid), octadecanoic acid (stearic acid), eicosanoic acid (arachidic acid), docosanoic acid (behenic acid), tetracosanoic acid; (2) fatty acids having a monovalent branched structure such as isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, isooctadecanoic acid; (3) fatty acids having a monovalent linear alkenyl group such as myristoleic acid, palmitoleic acid, oleic acid, elaidic acid, eicosenoic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, arachidonic acid; (4) hydroxycarboxylic acids such as ricinoleic acid; (5) natural fatty acids such as castor oil fatty acid, sesame oil fatty acid, rosin oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid, palm oil fatty acid, palm kernel fatty acid, coconut oil fatty acid, etc.

[0026] Specific examples of the alkylene oxide having 2 to 3 carbon atoms, which is a raw material for the ether monoester derivative (A), include ethylene oxide and propylene oxide. The addition molar number of the alkylene oxide is 1 mol or more and 30 mol or less, preferably 5 mol or more and 25 mol or less. It may also be in the range of any combination of the above upper and lower limits. Herein, the addition molar number of the alkylene oxide represents the molar number of the alkylene oxide relative to 1 mol of the compound to be added in the charged raw materials. The alkylene oxide may be used alone or two kinds of alkylene oxides may be used in appropriate combination. When two kinds of alkylene oxides are applied, the addition mode thereof may be any one of block addition, random addition, and a combination of block addition and random addition, and there is no particular limitation.

[0027] Specific examples of the ether monoester derivative (A) include, for example, a compound obtained by adding 10 mol of alkylene oxide to 1 mol of stearic acid, a compound obtained by adding 5 mol of alkylene oxide to 1 mol of stearic acid, a compound obtained by adding 20 mol of alkylene oxide to 1 mol of oleic acid, a compound obtained by adding 13 mol of alkylene oxide to 1 mol of oleic acid, a compound obtained by adding 10 mol of alkylene oxide to 1 mol of oleic acid, a compound obtained by adding 5 mol of alkylene oxide to 1 mol of oleic acid, a compound obtained by adding 10 mol of alkylene oxide to 1 mol of palmitic acid, a compound obtained by adding 10 mol of alkylene oxide to 1 mol of lauric acid, a compound obtained by adding 10 mol of alkylene oxide to 1 mol of coconut fatty acid, a compound obtained by randomly adding 5 mol of ethylene oxide and 10 mol of propylene oxide to 1 mol of stearic acid, a compound obtained by randomly adding 10 mol of ethylene oxide and 5 mol of propylene oxide to 1 mol of stearic acid, a compound obtained by adding 5 mol of ethylene oxide to 1 mol of stearic acid and then adding 10 mol of propylene oxide, a compound obtained by adding 10 mol of ethylene oxide to 1 mol of stearic acid and then adding 5 mol of propylene oxide, and the like.

[0028] These ether monoester derivatives (A) may be used alone or two or more kinds may be used in appropriate combination. (Ether diester derivative (B)) The ether diester derivative (B) used in the present embodiment is a compound obtained by esterifying a compound obtained by adding a total of 1 mol or more and 30 mol or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mol of a fatty acid having 12 to 24 carbon atoms with 1 mol of a fatty acid having 12 to 24 carbon atoms, but does not include polyethylene glycol dilaurate. The ether diester derivative (B) has a diester structure in which ester bonds are formed by bonding fatty acids to both end portions of a polyoxyalkylene chain polymerized from an alkylene oxide having 2 to 3 carbon atoms. The two fatty acids constituting the ether diester derivative (B) may be the same or different.

[0029] Specific examples of the fatty acid that is a raw material for the ether diester derivative (B) are the same as the specific examples of the fatty acid described as a raw material for the ether monoester derivative (A). Specific examples of the alkylene oxide having 2 or more and 3 or less carbon atoms that is a raw material for the ether diester derivative (B) are the same as the specific examples of the alkylene oxide having 2 or more and 3 or less carbon atoms described as a raw material for the ether monoester derivative (A).

[0030] Specific examples of the ether diester derivative (B) include, for example, a compound obtained by adding 14 moles of alkylene oxide to 1 mole of oleic acid and then adding 1 mole of oleic acid, a compound obtained by adding 23 moles of alkylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid, a compound obtained by adding 9 moles of alkylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid, a compound obtained by adding 5 moles of alkylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid, a compound obtained by adding 9 moles of alkylene oxide to 1 mole of lauric acid and then adding 1 mole of lauric acid, a compound obtained by randomly adding 5 moles of ethylene oxide and 10 moles of propylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid, a compound obtained by randomly adding 10 moles of ethylene oxide and 5 moles of propylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid, a compound obtained by adding 5 moles of ethylene oxide to 1 mole of stearic acid, then adding 10 moles of propylene oxide, and further adding 1 mole of stearic acid, a compound obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid, then adding 5 moles of propylene oxide, and further adding 1 mole of stearic acid, and the like.

[0031] These ether diester derivatives (B) can be used alone or in appropriate combination of two or more. In the treatment agent, the lower limit of the content ratio of the ether monoester derivative (A) is preferably 5% by mass or more, more preferably 10% by mass or more. When the content ratio of the ether monoester derivative (A) is 5% by mass or more, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treatment agent is applied. In addition, the upper limit of the content ratio of the ether monoester derivative (A) is preferably 95% by mass or less, more preferably 90% by mass or less. When the content ratio of the ether monoester derivative (A) is 95% by mass or less, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treatment agent is applied. Among them, it can also be in the range of any combination of the above upper and lower limits.

[0032] In the treating agent, the lower limit of the content ratio of the ether diester derivative (B) is preferably 5% by mass or more, more preferably 10% by mass or more. When the content ratio of the ether diester derivative (B) is 5% by mass or more, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treating agent is applied. In addition, the upper limit of the content ratio of the ether diester derivative (B) is preferably 95% by mass or less, more preferably 90% by mass or less. When the content ratio of the ether diester derivative (B) is 95% by mass or less, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treating agent is applied. Among them, it may also be in the range of any combination of the above upper and lower limits.

[0033] In the treating agent, preferably, when the total content ratio of the ether monoester derivative (A) and the ether diester derivative (B) is set to 100 parts by mass, the ether monoester derivative (A) is contained in an amount of 10 parts by mass or more and 90 parts by mass or less, and the ether diester derivative (B) is contained in an amount of 10 parts by mass or more and 90 parts by mass or less. By defining within this range, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treating agent is applied. Among them, it may also be in the range of any combination of the above upper and lower limits.

[0034] (Other nonionic surfactants) In the treating agent of the present embodiment, the nonionic surfactant (X) may also contain other nonionic surfactants other than the above-mentioned ether monoester derivative (A) and ether diester derivative (B).

[0035] Other nonionic surfactants may be appropriately those known in the art. Specific examples of other nonionic surfactants include, for example, (1) compounds formed by adding an alkylene oxide having 2 to 4 carbon atoms to an organic acid, organic alcohol, organic amine, and / or organic amide, such as polyoxyethylene octyl ether, polyoxyethylene stearyl ether, polyoxyethylene lauryl ether, polyoxyethylene lauryl methyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxypropylene lauryl methyl ether, polyoxyethylene oleyl ether, polyoxybutylene oleyl ether, polyoxyethylene polyoxypropylene nonyl ether, polyoxypropylene nonyl ether, polyoxyethylene polyoxypropylene octyl ether, ethylene oxide adduct of 2-hexylhexanol, polyoxyethylene 2-ethyl-1-hexyl ether, polyoxyethylene isononyl ether, polyoxyethylene dodecyl ether, a compound formed by adding ethylene oxide to secondary dodecanol, polyoxyethylene tridecyl ether, polyoxyalkylene tetradecyl ether, polyoxyethylene laurylamino ether, polyoxyethylene laurylamide ether, polyoxyalkylene triphenylated phenyl ether and other ether-type nonionic surfactants; (2) polyoxyalkylene sorbitan trioleate, polyoxyalkylene sorbitan monostearate, polyoxyalkylene sorbitan tristearate, polyoxyalkylene hydrogenated castor oil trioctanoate, maleate, stearate, or oleate of polyoxyalkylene hydrogenated castor oil and other polyoxyalkylene polyol fatty acid ester-type nonionic surfactants; (3) alkylamide-type nonionic surfactants such as stearic acid diethanolamide and diethanolamine monolaurylamide; (4) polyoxyalkylene fatty acid amide-type nonionic surfactants such as polyoxyethylene diethanolamine monooleamide, polyoxyethylene laurylamine, and polyoxyethylene tallowamine; (5) ether-ester compounds such as copolymers of polyoxyethylene, dimethyl phthalate, and lauryl alcohol, etc.

[0036] These nonionic surfactants may be used alone or two or more of them may be appropriately combined. (Anionic surfactant (C)) The treatment agent of the present embodiment may further contain an anionic surfactant (C). By containing the anionic surfactant (C) in the treatment agent, the emulsion stability of the dilution obtained by diluting the treatment agent with a solvent can be improved.

[0037] As the anionic surfactant (C), those known in the art can be appropriately used. Specific examples of the anionic surfactant (C) include, for example, (1) phosphate esters of aliphatic alcohols such as lauryl phosphate, cetyl phosphate, isocetyl phosphate, octyl phosphate, oleyl phosphate, stearyl phosphate; (2) phosphate esters of aliphatic alcohols to which at least one alkylene oxide selected from ethylene oxide and propylene oxide is added, such as polyoxyethylene lauryl ether phosphate, polyoxyethylene oleyl ether phosphate, polyoxyethylene stearyl ether phosphate; (3) aliphatic sulfonates or aromatic sulfonates such as lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecyl sulfonate, dodecylbenzenesulfonate, secondary alkane sulfonate (with 13 to 15 carbon atoms) salt, secondary alkane sulfonate (with 11 to 14 carbon atoms), α-olefin sulfonate; (4) sulfate esters of aliphatic alcohols such as lauryl sulfate, oleyl sulfate, stearyl sulfate; (5) sulfate esters of aliphatic alcohols to which at least one alkylene oxide selected from ethylene oxide and propylene oxide is added, such as polyoxyethylene lauryl ether sulfate, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate, polyoxyethylene oleyl ether sulfate; (6) sulfate esters of fatty acids such as castor oil fatty acid sulfate, sesame oil fatty acid sulfate, rosin oil fatty acid sulfate, soybean oil fatty acid sulfate, rapeseed oil fatty acid sulfate, palm oil fatty acid sulfate; (7) sulfate esters of oils and fats such as castor oil sulfate, sesame oil sulfate, rosin oil sulfate, soybean oil sulfate, rapeseed oil sulfate, palm oil sulfate, beef tallow sulfate; (8) fatty acid salts such as laurate, oleate, stearate, 2-ethylhexanoate; (9) sulfosuccinate esters of aliphatic alcohols such as bis(2-ethylhexyl)sulfosuccinate; (10) N-acylsarcosinates such as oleoyl sarcosinate, etc.

[0038] Examples of the salts constituting the anionic surfactant (C) include metal salts, ammonium salts, phosphonium salts, organic amine salts, etc. Examples of the metal salts include alkali metal salts and alkaline earth metal salts. Specific examples of the alkali metals constituting the alkali metal salts include, for example, sodium, potassium, lithium, etc. The alkaline earth metals constituting the alkaline earth metal salts can be the metals of Group 2 elements, such as calcium, magnesium, beryllium, strontium, barium, etc.

[0039] Specific examples of the phosphonium constituting the phosphonium salts include quaternary phosphonium such as tetramethylphosphonium, tetraethylphosphonium, tetrabutylphosphonium, tetraoctylphosphonium, dibutyldihexylphosphonium, trihexyltetradecylphosphonium, triethyloctylphosphonium, trioctylmethylphosphonium, triphenylmethylphosphonium, etc.

[0040] The amine constituting the organic amine salt can be any one of primary amines, secondary amines, and tertiary amines. Specific examples of the amine constituting the amine salt include, for example, (1) aliphatic amines such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, N-N-diisopropylethylamine, butylamine, dibutylamine, 2-methylbutylamine, tributylamine, octylamine, dimethyllaurylamine; (2) aromatic amines or heterocyclic amines such as aniline, N-methylbenzylamine, pyridine, morpholine, piperazine, and these derivatives; (3) alkanolamines such as monoethanolamine, N-methylethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, dibutylethanolamine, butyldiethanolamine, octyldiethanolamine, lauryldiethanolamine; (4) arylamines such as N-methylbenzylamine; (5) polyoxyalkylene alkylamine ethers such as polyoxyethylene laurylamine ether, polyoxyethylene stearylamine ether, etc.

[0041] These anionic surfactants (C) can be used alone or in combination of two or more as appropriate. In the treatment agent, the lower limit of the content ratio of the anionic surfactant (C) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content ratio of the anionic surfactant (C) is 0.1% by mass or more, the emulsion stability of the dilution liquid after the treatment agent is diluted with a solvent can be further improved. The upper limit of the content ratio of this anionic surfactant (C) is preferably 30% by mass or less, more preferably 25% by mass or less. When the content ratio of the anionic surfactant (C) is 30% by mass or less, the deterioration of water shedding and foaming of the water in the hydroentangling step of the fiber to which the treatment agent is applied can be further reduced. Among them, it can also be in the range of any combination of the above upper and lower limits.

[0042] In the treatment agent, when the total content ratio of the ether monoester derivative (A), the ether diester derivative (B), and the anionic surfactant (C) is set to 100 parts by mass, it is preferably to contain 10 parts by mass or more and 85 parts by mass or less of the ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the ether diester derivative (B), and 0.1 parts by mass or more and 20 parts by mass or less of the anionic surfactant (C). By defining it within this range, the deterioration of water shedding and foaming of the water in the hydroentangling step of the fiber to which the treatment agent is applied can be further reduced. Among them, it can also be in the range of any combination of the above upper and lower limits.

[0043] (Fatty acids (D)) The treatment agent of this embodiment can further be mixed with fatty acids (D). By the treatment agent containing fatty acids (D), the deterioration of water shedding and foaming of the water in the hydroentangling step of the fiber to which the treatment agent is applied can be reduced.

[0044] The fatty acids (D) used in the treatment agent of this embodiment are at least one selected from fatty acids and oils having 12 or more and 24 or less carbon atoms. Specific examples of the fatty acid are the same as the specific examples of the fatty acid described as the raw material for the ether monoester derivative (A).

[0045] Examples of the oil or fat include at least one selected from vegetable oils, animal oils, and hydrogenated oils thereof. Specific examples of the vegetable oil include, for example, coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil, sesame oil, olive oil, camellia oil, shea butter, almond oil, safflower oil, cottonseed oil, corn oil, rice bran oil, rice germ oil, grapeseed oil, avocado oil, palm oil, rosin oil, etc. Specific examples of the animal oil include, for example, egg yolk oil, beef tallow, lard, fish oil, etc.

[0046] These fatty acid compounds (D) may be used alone or in appropriate combination of two or more. In the treatment agent, the lower limit of the content ratio of the fatty acid compound (D) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content ratio of the fatty acid compound (D) is 0.1% by mass or more, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treatment agent is applied. The upper limit of the content ratio of the fatty acid compound (D) is preferably 15% by mass or less, more preferably 10% by mass or less. When the content ratio of the fatty acid compound (D) is 15% by mass or less, it is possible to further improve the emulsion stability of the dilution obtained by diluting the treatment agent with a solvent. Among them, it may also be in the range of any combination of the above upper and lower limits.

[0047] In the treatment agent, when the total content ratio of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), and the fatty acid compound (D) is set to 100 parts by mass, it is preferably contained 10 parts by mass or more and 85 parts by mass or less of the ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the ether diester derivative (B), 0.1 parts by mass or more and 20 parts by mass or less of the anionic surfactant (C), and 0.1 parts by mass or more and 10 parts by mass or less of the fatty acid compound (D). By defining within this range, it is possible to further reduce the deterioration of water shedding and foaming of water in the hydroentangling step of the fiber to which the treatment agent is applied. In addition, it is possible to further improve the emulsion stability of the dilution obtained by diluting the treatment agent with a solvent. Among them, it may also be in the range of any combination of the above upper and lower limits.

[0048] (Polyhydric alcohol (E)) The treatment agent of the present embodiment may further be blended with a polyhydric alcohol (E). By containing the polyhydric alcohol (E) in the treatment agent, it is possible to improve the carding property when the fiber to which the treatment agent is applied passes through the carding.

[0049] Specific examples of the polyol may include, for example, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, 1,3 - propanediol, 1,2 - butanediol, 1,3 - butanediol, 1,4 - butanediol, 2 - methyl - 1,2 - propanediol, 1,5 - pentanediol, 1,6 - hexanediol, 2,5 - hexanediol, 2 - methyl - 2,4 - pentanediol, 2,3 - dimethyl - 2,3 - butanediol, glycerin, 2 - methyl - 2 - hydroxymethyl - 1,3 - propanediol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, etc.

[0050] These polyols (E) may be used alone or two or more of them may be used in appropriate combination. In the treating agent, the lower limit of the content ratio of the polyol (E) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more. The upper limit of the content ratio of the polyol (E) is preferably 70% by mass or less, more preferably 65% by mass or less. By defining the content ratio of the polyol (E) within this range, the carding property of the fiber imparted with the treating agent during carding can be improved. Among them, it can also be in the range of any combination of the above upper and lower limits.

[0051] In the treating agent, when the total content ratio of the ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), fatty acids (D), and polyol (E) is set to 100 parts by mass, it is preferably to contain 10 parts by mass or more and 85 parts by mass or less of the ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the ether diester derivative (B), 0.1 part by mass or more and 20 parts by mass or less of the anionic surfactant (C), 0.1 part by mass or more and 10 parts by mass or less of the fatty acids (D), and 0.1 part by mass or more and 70 parts by mass or less of the polyol (E). By defining it within this range, the deterioration of water shedding and foaming of the fiber imparted with the treating agent during the hydroentangling step can be further reduced. Among them, it can also be in the range of any combination of the above upper and lower limits.

[0052] (Lubricant (F)) The treating agent of the present embodiment may further be admixed with a lubricant (F). By the treating agent containing the lubricant (F), the carding property of the fiber imparted with the treating agent during carding can be improved.

[0053] The lubricant (F) used in the treating agent of the present embodiment is at least one selected from hydrocarbons, esters excluding oils and fats, and silicones. Specific examples of the hydrocarbon may include, for example, aromatic hydrocarbons, paraffinic hydrocarbons, naphthenic hydrocarbons, etc. More specifically, for example, mineral oil, spindle oil, liquid paraffin, etc. These hydrocarbons can also be appropriately commercially available products.

[0054] There are no particular restrictions on the ester, and ester oils produced from fatty acids and alcohols can be cited. For example, ester oils are produced from fatty acids and alcohols having odd or even hydrocarbon groups.

[0055] Regarding the fatty acid as a raw material of the ester oil, there are no particular restrictions on the number of carbon atoms, presence or absence of side chains, number of acid groups, etc. In addition, it can be, for example, a higher fatty acid, a fatty acid having a ring, or a fatty acid having an aromatic ring. Regarding the alcohol as a raw material of the ester oil, there are no particular restrictions on the number of carbon atoms, presence or absence of side chains, number of hydroxyl groups, etc. In addition, it can be, for example, a higher alcohol, an alcohol having a ring, or an alcohol having an aromatic ring.

[0056] Specific examples of the ester oil can include, for example, (1) ester compounds formed from aliphatic monohydric alcohols and aliphatic monocarboxylic acids such as stearyl stearate, octyl palmitate, oleyl laurate, oleyl oleate, isotridecyl stearate, isocetyl oleate; (2) complete ester compounds formed from aliphatic polyhydric alcohols and aliphatic monocarboxylic acids such as 1,6 - hexanediol didecanoate, glyceryl trioleate, trimethylolpropane trilaurate, pentaerythritol tetraoctanoate; (3) partial ester compounds formed from aliphatic polyhydric alcohols and aliphatic monocarboxylic acids such as sorbitan monostearate; (4) complete ester compounds formed from aliphatic monohydric alcohols and aliphatic polycarboxylic acids such as dioleyl azelate, dilauryl thiodipropionate, diisocetyl thiodipropionate, diisostearyl thiodipropionate; (5) ester compounds formed from aromatic monohydric alcohols and aliphatic monocarboxylic acids such as benzyl oleate, benzyl laurate; (6) complete ester compounds formed from aromatic polyhydric alcohols and aliphatic monocarboxylic acids such as bisphenol A dilaurate; (7) complete ester compounds formed from aliphatic monohydric alcohols and aromatic polycarboxylic acids such as bis(2 - ethylhexyl) phthalate, diisostearyl isophthalate, trioctyl trimellitate, etc.

[0057] Specific examples of the silicone can include, for example, dimethyl silicone, phenyl - modified silicone, amino - modified silicone, amide - modified silicone, polyether - modified silicone, amino - polyether - modified silicone, alkyl - modified silicone, alkyl - aralkyl - modified silicone, alkyl - polyether - modified silicone, ester - modified silicone, epoxy - modified silicone, methanol - modified silicone, mercapto - modified silicone, polyoxyalkylene - modified silicone, etc.

[0058] In the treatment agent, the lower limit of the content ratio of the lubricant (F) is preferably 0.5% by mass or more, more preferably 1% by mass or more. The upper limit of the content ratio of the lubricant (F) is preferably 25% by mass or less, more preferably 20% by mass or less. By defining the content ratio of the lubricant (F) within this range, the carding property of the fibers to which the treatment agent is applied during carding can be improved. Among them, it can also be a range of any combination of the above - mentioned upper and lower limits.

[0059] In the treatment agent, when the total of the content ratios of the ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), fatty acids (D), polyhydric alcohol (E), and lubricant (F) is set to 100 parts by mass, it is preferably contained 10 parts by mass or more and 85 parts by mass or less of the ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the ether diester derivative (B), 0.1 parts by mass or more and 20 parts by mass or less of the anionic surfactant (C), 0.1 parts by mass or more and 10 parts by mass or less of the fatty acids (D), 0.1 parts by mass or more and 70 parts by mass or less of the polyhydric alcohol (E), and 1 part by mass or more and 20 parts by mass or less of the lubricant (F). By defining within this range, it is possible to further reduce the deterioration of water shedding and foaming of the water used in the hydroentangling step of the fiber to which the treatment agent is applied. Among them, it may also be a range of any combination of the above upper and lower limits.

[0060] (Storage method) The treatment agent can be configured as a single dosage form containing the above components (A) to (E). From the viewpoint of improving the preparation stability, it can also be configured as a two-dosage form treatment agent as follows.

[0061] The two-dosage form treatment agent is configured to include a first treatment agent for rayon hydroentangling (hereinafter referred to as "the first treatment agent") and a second treatment agent for rayon hydroentangling (hereinafter referred to as "the second treatment agent") in a grouped manner. The first treatment agent contains the ether monoester derivative (A) and the ether diester derivative (B), and the second treatment agent contains at least one selected from the anionic surfactant (C) and the polyhydric alcohol (E). The first treatment agent may also optionally contain the fatty acids (D) and / or the lubricant (F).

[0062] Before use, the two-dosage form treatment agent, for example, during storage or circulation, etc., is configured in a separated dosage form of the first treatment agent and the second treatment agent. When using the two-dosage form treatment agent, the first treatment agent and the second treatment agent are mixed to prepare a mixture.

[0063] (Solvent) The treatment agent of the present embodiment can also be mixed with a solvent (S) as appropriate to prepare a composition containing a treatment agent for rayon hydroentangling (hereinafter referred to as "the composition containing the treatment agent"), and stored or circulated in the form of the composition containing the treatment agent.

[0064] The boiling point of the solvent (S) under atmospheric pressure is 105°C or lower. The atmospheric pressure in this specification refers to the standard atmospheric pressure (101325 Pa = 1 atm). Examples of the solvent include water and organic solvents. Specific examples of the organic solvent include lower alcohols such as ethanol and propanol, or low-polarity solvents such as hexane. These solvents can be used alone as one type, or two or more types can be used in appropriate combination. Among these, from the viewpoint of excellent dispersibility or solubility of each component, polar solvents such as water and lower alcohols are preferred, and from the viewpoint of excellent emulsion stability and operability, water is more preferred.

[0065] In the composition containing the treatment agent, when the total of the content ratios of the treatment agent and the solvent (S) is set to 100 parts by mass, it is preferably 10 parts by mass or more and 99.99 parts by mass or less of the treatment agent, and 0.01 parts by mass or more and 90 parts by mass or less of the solvent (S).

[0066] (Rayon) The rayon to which the treatment agent of this embodiment is applicable can be long fibers generally called "filament", or short fibers generally called "staple". Among them, short fibers are preferred. The length of the short fibers in this embodiment is not particularly limited as long as it conforms to the definition of short fibers in this technical field. For example, it is preferably 100 mm or less, and more preferably 51 mm or less.

[0067] The effects of the treatment agent of the first embodiment will be described. (1-1) The treatment agent of the first embodiment described above is configured to contain a nonionic surfactant (X), which includes the above-mentioned ether monoester derivative (A) and ether diester derivative (B). Therefore, even when the drying temperature in the fiber drying step before the carding process is relatively high, it is possible to reduce the deterioration of water shedding and foaming of the water in the hydroentangling step of the fiber to which the treatment agent for rayon hydroentangling is applied. In addition, the emulsion stability of the diluted solution of the treatment agent can be improved. In addition, the carding property when the fiber to which the treatment agent is applied passes through the carding can be improved.

[0068] (1-2) The treatment agent of the first embodiment described above can also be configured to collectively include a first treatment agent and a second treatment agent. Among them, the first treatment agent contains an ether monoester derivative (A) and an ether diester derivative (B), and the second treatment agent contains at least one selected from an anionic surfactant (C) and a polyol (E). According to this configuration, the formulation stability of the treatment agent, especially the storage stability, can be improved.

[0069] <Second Embodiment> Next, the second embodiment that embodies the first treatment agent of the present invention will be described, and the description will be centered on the differences from the above embodiments.

[0070] The first treating agent of the present embodiment contains an ether monoester derivative (A) and an ether diester derivative (B). The first treating agent may further optionally contain fatty acids (D) and / or lubricants (F). The first treating agent is used in combination with a second treating agent or a composition containing the second treating agent for rayon spunlace (hereinafter referred to as "the composition containing the second treating agent"), wherein the second treating agent contains at least one selected from anionic surfactants (C) and polyhydric alcohols (E), and the composition containing the second treating agent contains the second treating agent and a solvent (S).

[0071] The ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acids (D), the polyhydric alcohol (E), the lubricant (F), and the solvent (S) are the same as the components described in the first embodiment respectively.

[0072] (Solvent) The first treating agent of the present embodiment may also be mixed with the solvent (S) as appropriate to prepare a composition containing the first treating agent for rayon spunlace (hereinafter referred to as "the composition containing the first treating agent"), and the composition containing the first treating agent is stored or circulated in the form of the composition containing the first treating agent.

[0073] The solvent (S) can be the one exemplified in the first embodiment. In the composition containing the first treating agent, when the total of the content ratios of the first treating agent and the solvent is set to 100 parts by mass, it is preferably to contain 0.01 part by mass or more of the first treating agent.

[0074] The effects of the first treating agent of the second embodiment will be described. In addition to the effects of the above-described embodiment, the second embodiment also has the following effects. (2-1) The first treating agent of the second embodiment contains an ether monoester derivative (A) and an ether diester derivative (B), and is used in combination with the second treating agent containing an anionic surfactant (C) or a polyhydric alcohol (E) during use. Therefore, the formulation stability, especially the storage stability, of the first treating agent and the second treating agent can be improved. In addition, by adjusting the mixing ratio with the second treating agent, the composition of the obtained treating agent can be adjusted. In addition, the first treating agent can be circulated separately from the second treating agent.

[0075] <Third Embodiment> Next, the third embodiment that embodies the method for manufacturing a spunlace nonwoven fabric of the present invention (hereinafter referred to as "the method for manufacturing a nonwoven fabric") will be described.

[0076] The manufacturing method of the non-woven fabric of the present embodiment comprises the following steps: a step of attaching a treating agent to rayon (step 1); a step of using the rayon obtained in step 1 for a carding process to produce a carded web (step 2); a step of entangling the carded web obtained in step 2 with water flow to obtain a spunlace non-woven fabric (step 3).

[0077] When the treating agent is a one-component treating agent, in step 1, a diluent containing a solvent and the treating agent of the first embodiment is prepared. Examples of the method for preparing the diluent include a method of adding the treating agent of the first embodiment or a composition containing the treating agent to a solvent. Preferably, the diluent is prepared by adding the treating agent of the first embodiment or a composition containing the treating agent to water.

[0078] When the treating agent is a two-component treating agent, in step 1, a diluent containing a solvent and the first treating agent and the second treating agent of the second embodiment is prepared. Examples of the method for preparing the diluent include a method of adding the first treating agent or a composition containing the first treating agent, and the second treating agent or a composition containing the second treating agent to a solvent. Preferably, the diluent is prepared by adding the first treating agent or a composition containing the first treating agent, and the second treating agent or a composition containing the second treating agent to water. The preferred comparison of the content ratio between the first treating agent and the second treating agent is the mass ratio of the non-volatile components, that is, the first treating agent / the second treating agent = 95 / 5 to 5 / 95. By defining within this range, the operability can be improved. Herein, in this specification, the non-volatile component refers to the residue after the object is heat-treated at 105 °C for 2 hours to sufficiently remove volatile substances, that is, the absolute dry matter.

[0079] Examples of the solvent used for manufacturing the diluent are those exemplified in the first embodiment. From the viewpoints of operability and the like, preferably, the concentration of the treating agent in the diluent is 0.1% by mass or more and 10% by mass or less.

[0080] In the manner of using the first treating agent and the second treating agent together, the mixing ratio of each agent can be arbitrarily changed. Therefore, even under conditions where there are differences in manufacturing conditions such as different manufacturing equipment or different climates such as temperature and humidity, it is still possible to easily prepare a treating agent or diluent for imparting optimal fiber properties or fiber manufacturing properties by finely adjusting the mixing ratio.

[0081] As the method for attaching the treating agent, known methods can be applied, such as an impregnation method, a spraying method, a pouring method, a roller method, a dropping and flowing method, etc. In addition, the step of attaching it is not particularly limited, and examples include a subsequent step of a refining step, etc. Preferably, the amount of the treating agent attached is such that the solid component without the solvent is attached to the rayon at a ratio of 0.1 to 1% by mass. The fibers to which the treating agent is imparted can be dried under appropriate conditions.

[0082] Step 2 is a step of carding the rayon attached with the above-mentioned treatment agent to produce a carded web. Carding can be carried out using a well-known carding machine. Examples include a flat carding machine, a combination carding machine, a carding roller, etc.

[0083] The step of obtaining the spunlace nonwoven fabric in Step 3 is a step of entangling the carded web obtained in the step of producing the carded web with water flow. High-pressure water flow is sprayed on the carded web, and the fibers can be entangled with each other to form a plate shape by the pressure of the water flow. After the water flow entanglement step, an appropriate drying step or winding step can also be carried out.

[0084] The effects of the method for manufacturing the nonwoven fabric according to the third embodiment will be described. The third embodiment has the following effects in addition to the effects of the above-mentioned embodiments. (3-1) In the method for manufacturing the nonwoven fabric according to the third embodiment, since the deterioration of the water shedding and foaming used in the water flow entanglement can be reduced, the water used in the water flow entanglement can be recycled to carry out the water flow entanglement. Therefore, the water flow entanglement can be carried out smoothly, and the texture of the spunlace nonwoven fabric can be improved.

[0085] (3-2) In addition, when the fibers to which the treatment agent is applied are dried under appropriate conditions, high-temperature conditions of 100°C or higher can be adopted, for example. According to this configuration, the drying treatment can be completed in a short time, thereby improving the manufacturing efficiency of the spunlace nonwoven fabric.

[0086] Among them, the above-mentioned embodiments can be modified as follows. The above-mentioned embodiments and the following modification examples can be implemented in combination with each other within the scope of no technical contradiction. · The method for preparing the dilution of the treatment agent in the above-mentioned embodiment is not particularly limited, and a method other than the method described in the description of the third embodiment can also be adopted.

[0087] · Within the scope of not impairing the effects of the present invention, each treatment agent, each composition, or dilution in the above-mentioned embodiment can also be further mixed with other components for maintaining the quality of each treatment agent, each composition, or dilution, such as other solvents, stabilizers, antistatic agents, linking agents, antioxidants, ultraviolet absorbers, organic acids, surfactants other than the above, etc., which are generally used in treatment agents. Among them, from the viewpoint of effectively exerting the efficacy of the present invention, other components generally used in treatment agents other than solvents are preferably 50% by mass or less in each treatment agent. Examples

[0088] Hereinafter, examples and the like are given to more specifically illustrate the constitution and effects of the present invention, but the present invention is not limited to these examples. Among them, in the description of the following examples and comparative examples, unless otherwise specified, parts represent parts by mass, and % represents %.

[0089] Test Category 1 (Preparation of 1 Dosage Form Treatment Agent) (Example 1) Prepare the treatment agent of Example 1, which contains 23 parts (%) of an ether monoester derivative (A) (a compound (A-1) obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid) as a nonionic surfactant (X) shown in Table 1 and 27 parts (%) of an ether diester derivative (B) (a compound (B-1) obtained by adding 14 moles of ethylene oxide to 1 mole of oleic acid and then adding 1 mole of oleic acid), 10 parts (%) of potassium lauryl phosphate (C-1) as an anionic surfactant (C), 2 parts (%) of tallow (D-1) as a fatty acid (D), 36 parts (%) of ethylene glycol (E-1) as a polyol (E), and 2 parts (%) of stearyl stearate (F-1) as a lubricant (F).

[0090] (Examples 2 to 32, Comparative Examples 1 to 11) Prepare the treatment agents of Examples 2 to 32 and Comparative Examples 1 to 11 in the same manner as the treatment agent of Example 1, which contain ionic surfactants (X), anionic surfactants (C), fatty acids (D), polyols (E), and lubricants (F) in the proportions shown in Table 1.

[0091] The types and contents of the nonionic surfactant (X), anionic surfactant (C), fatty acid (D), polyol (E), and lubricant (F) are shown in the columns of "Nonionic Surfactant (X)", "Anionic Surfactant (C)", "Fatty Acid (D)", "Polyol (E)", and "Lubricant (F)" in Table 1, respectively. Among them, the content of other nonionic surfactant (G) represents the blending amount (parts) when the total of the contents of the ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), fatty acid (D), polyol (E), and lubricant (F) in the treatment agent is set to 100 parts.

[0092] [Table 1]

[0093] [Table 2]

[0094] The details of the nonionic surfactant (X), anionic surfactant (C), fatty acid (D), polyol (E), and lubricant (F) recorded in Table 1 are as follows. <Nonionic Surfactant (X)> (Ether Monoester Derivative (A)) A-1: A compound formed by adding 10 moles of ethylene oxide to 1 mole of stearic acid A-2: A compound formed by adding 5 moles of ethylene oxide to 1 mole of stearic acid A-3: A compound formed by adding 20 moles of ethylene oxide to 1 mole of oleic acid A-4: A compound formed by adding 13 moles of ethylene oxide to 1 mole of oleic acid A-5: A compound formed by adding 10 moles of ethylene oxide to 1 mole of oleic acid A-6: A compound formed by adding 5 moles of ethylene oxide to 1 mole of oleic acid A-7: A compound formed by adding 10 moles of ethylene oxide to 1 mole of palmitic acid A-8: A compound formed by adding 10 moles of ethylene oxide to 1 mole of lauric acid A-9: A compound formed by adding 10 moles of ethylene oxide to 1 mole of coconut fatty acid A-10: A compound formed by adding 20 moles of propylene oxide to 1 mole of oleic acid A-11: A compound formed by adding 10 moles of propylene oxide to 1 mole of oleic acid A-12: A compound formed by adding 5 moles of propylene oxide to 1 mole of stearic acid A-13: A compound formed by randomly adding 5 moles of ethylene oxide and 10 moles of propylene oxide to 1 mole of stearic acid A-14: A compound formed by randomly adding 10 moles of ethylene oxide and 5 moles of propylene oxide to 1 mole of stearic acid A-15: A compound formed by adding 5 moles of ethylene oxide to 1 mole of stearic acid and then adding 10 moles of propylene oxide A-16: A compound formed by adding 10 moles of ethylene oxide to 1 mole of stearic acid and then adding 5 moles of propylene oxide rA-17: A compound formed by adding 40 moles of ethylene oxide to 1 mole of stearic acid rA-18: A compound formed by adding 10 moles of ethylene oxide to 1 mole of cerotic acid Among them, rA-17 and rA-18 are compounds similar to ether monoester derivative (A).

[0095] (Ether diester derivative (B)) B-1: A compound formed by adding 14 moles of ethylene oxide to 1 mole of oleic acid and then adding 1 mole of oleic acid B-2: A compound formed by adding 23 moles of ethylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by adding 9 moles of ethylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by adding 5 moles of ethylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by adding 9 moles of ethylene oxide to 1 mole of lauric acid and then adding 1 mole of lauric acid Compound formed by adding 9 moles of propylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by adding 5 moles of propylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by randomly adding 5 moles of ethylene oxide and 10 moles of propylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by randomly adding 10 moles of ethylene oxide and 5 moles of propylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Compound formed by adding 5 moles of ethylene oxide to 1 mole of stearic acid, then adding 10 moles of propylene oxide, and further adding 1 mole of stearic acid Compound formed by adding 10 moles of ethylene oxide to 1 mole of stearic acid, then adding 5 moles of propylene oxide, and further adding 1 mole of stearic acid Compound formed by adding 9 moles of ethylene oxide to 1 mole of cerotic acid and then adding 1 mole of cerotic acid Compound formed by adding 40 moles of ethylene oxide to 1 mole of stearic acid and then adding 1 mole of stearic acid Among them, rB-12 and rB-13 are compounds similar to the ether diester derivative (B).

[0096] (Other non-ionic surfactants (G)) G-1: Polyoxyethylene (n = 5: indicating the number of moles of ethylene oxide added (the same below)) stearyl ether G-2: Polyoxyethylene (n = 9) lauryl ether G-3: Polyoxyethylene (n = 20) sorbitan monostearate G-4: Polyoxyethylene (n = 18) sorbitan monostearate G-5: Polyoxyethylene (n = 20) sorbitan tristearate <Anionic surfactant (C)> C-1: Potassium lauryl phosphate C-2: Sodium dioctyl sulfosuccinate C-3: Sodium tallow sulfate C-4: Sodium Oleate C-5: Potassium Oleate C-6: Potassium Stearate C-7: Potassium Laurate C-8: Potassium Caprylate C-9: Sodium Lauryl Sulfonate C-10: Sodium Tetradecyl Sulfonate <Fatty Acids (D)> D-1: Tallow D-2: Stearic Acid D-3: Oleic Acid D-4: Palmitic Acid D-5: Lauric Acid D-6: Coconut Fatty Acid D-7: Behenic Acid D-8: Castor Oil D-9: Hydrogenated Castor Oil D-10: Palm Oil D-11: Hydrogenated Palm Oil D-12: Rosin Oil D-13: Coconut Oil <Polyhydric Alcohols (E)> E-1: Ethylene Glycol E-2: Diethylene Glycol E-3: Propylene Glycol E-4: Glycerol E-5: Polyethylene Glycol (weight average molecular weight 200) E-6: Polyethylene Glycol (weight average molecular weight 400) E-7: Polyethylene Glycol (weight average molecular weight 600) E-8: Polyethylene Glycol (weight average molecular weight 2000) E-9: Polypropylene Glycol (weight average molecular weight 400) <Lubricants (F)> F-1: Stearyl Stearate F-2: Mineral Oil (kinematic viscosity (40 °C): 90 mm 2 / s) F-3: Mineral Oil (kinematic viscosity (40 °C): 15 mm 2 / s) F-4: Dimethyl Silicone (kinematic viscosity (25 °C): 10 mm 2 / s) F-5: Sorbitan Monostearate Among them, the weight average molecular weight is determined by gel permeation chromatography.

[0097] Test Category 2 (Adhesion of Treatment Agent to Rayon Fibers) Dilute each treatment agent prepared in Test Category 1 with ion-exchanged water to prepare a 0.15% dilution of the treatment agent. Spray and apply the diluted treatment agent to rayon fibers with a fineness of 1.3×10 -4 g / m and a fiber length of 38 mm so that the adhesion amount becomes 0.15%. Then, dry with a hot air dryer at 80°C for 2 hours, or dry with a hot air dryer at 120°C for 1 hour, and then condition the humidity overnight at 25°C×40% RH to obtain rayon fibers with the treatment agent adhered thereto.

[0098] Test Category 3 (Drop-off and Foaming Test) Immerse 15 g of the rayon fibers with the treatment agent adhered in Test Category 2 in 150 g of ion-exchanged water for 2 hours. Then, take out the immersed fibers and squeeze them with a manual juicer. Pour 10 mL of the squeezed liquid into a 25 mL stoppered graduated cylinder, cover it, and shake it vigorously at a rhythm of 30 times in 10 seconds (amplitude 30 cm). Then, after standing for 5 minutes, measure the height from the water surface to the upper surface of the foam, and evaluate the drop-off and foaming property using the following criteria. The results are shown in the "Drop-off and Foaming Test" column of Table 2.

[0099] · Evaluation Criteria for Drop-off and Foaming Test ◎◎ (Excellent): The height from the water surface to the upper surface of the foam is less than 1 mm ◎ (Good): The height from the water surface to the upper surface of the foam is 1 mm or more and less than 1.5 mm ○ (Qualified): The height from the water surface to the upper surface of the foam is 1.5 mm or more and less than 4 mm × (Unqualified): The height from the water surface to the upper surface of the foam is 4 mm or more Test Category 4 (Emulsion Stability) Add 95 parts by mass of ion-exchanged water to 5 parts by mass of each treatment agent prepared in Test Category 1, and stir at 50°C to prepare a diluted solution of the treatment agent containing 5 parts by mass of the treatment agent. Pour 100 mL of the prepared diluted solution of the treatment agent into a 100 mL carrot-shaped precipitation flask. Let it stand in an environment at 20°C, and after 24 hours, confirm the precipitation amount, and evaluate the emulsion stability using the following criteria. The results are shown in the "Emulsion Stability" column of Table 2.

[0100] · Evaluation Criteria for Emulsion Stability ◎◎ (Excellent): The precipitation amount is less than 0.1 mL ◎ (Good): The precipitation amount is 0.1 mL or more and less than 0.5 mL ○ (Qualified): The precipitation amount is 0.5 mL or more and less than 1 mL × (Unqualified): The precipitation amount is 1 mL or more Test category 5 (Carding property) Adjust the humidity of 20 g of rayon fibers coated with each treatment agent prepared in Test category 1 in a constant temperature chamber at 20 °C and 65% RH for 24 hours, and then send them to a mini carding machine. Calculate the ratio of the discharge amount to the input amount as the carding spinning rate (%) using the following formula (1), and evaluate the carding property using the following evaluation criteria. The results are shown in the "Carding property" column of Table 2.

[0101] [Equation 1]

[0102] · Evaluation criteria for carding property ◎◎ (Excellent): The carding spinning rate is 90% or more ◎ (Good): The carding spinning rate is 85% or more and less than 90% ○ (Qualified): The carding spinning rate is 80% or more and less than 85% × (Unqualified): The carding spinning rate is less than 80% Test category 6 (Preparation of a composition containing the first treatment agent of the two-component treatment agent) (Composition (I-1) containing the first treatment agent) Prepare a composition (I-1) containing the first treatment agent, which contains 20 parts (%) of an ether monoester derivative (A) (a compound (A-1) obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid) as a nonionic surfactant (X) shown in Table 3, 23 parts (%) of an ether diester derivative (B) (a compound (B-1) obtained by adding 14 moles of ethylene oxide to 1 mole of oleic acid and then adding 1 mole of oleic acid), 2 parts (%) of tallow (D-1) as a fatty acid (D), 2 parts (%) of stearyl stearate (F-1) as a lubricant (F), and 53 parts (%) of water as a solvent (S).

[0103] (Compositions (I-2) to (I-28) containing the first treatment agent) Prepare in the same manner as the composition (I-1) containing the first treatment agent, containing the nonionic surfactant (X), fatty acid (D), lubricant (F), and solvent (S) in the proportions shown in Table 3.

[0104] The types and contents of the nonionic surfactant (X), fatty acid (D), lubricant (F), and solvent (S) are shown in the "Nonionic surfactant (X)" column, "Fatty acid (D)" column, "Lubricant (F)" column, and "Solvent (S)" column of Table 3, respectively.

[0105] [Table 3]

[0106] Test Category 7 (Preparation of Composition Containing Second Treatment Agent of Two-Formulation Treatment Agent) (Composition (II-1) Containing Second Treatment Agent) Prepare composition (II-1) containing a second treatment agent, which contains 9 parts (%) of potassium lauryl phosphate (C-1) as an anionic surfactant (C) as shown in Table 4, 31 parts (%) of ethylene glycol (E-1) as a polyol (E), and 60 parts (%) of water as a solvent (S).

[0107] (Compositions (II-2) to (II-28) Containing Second Treatment Agent) Prepare, in the same manner as composition (II-1) containing a second treatment agent, an anionic surfactant (C), a polyol (E), and a solvent (S) in the proportions shown in Table 4.

[0108] The types and contents of the anionic surfactant (C), the polyol (E), and the solvent (S) are shown in the "Anionic Surfactant (C)" column, "Polyol (E)" column, and "Solvent (S)" column of Table 4, respectively.

[0109] [Table 4]

[0110] Test Category 8 (Evaluation of Formulation Stability) Leave the composition containing the first treatment agent and the composition containing the second treatment agent in an environment at 50°C, and confirm the appearance after 24 hours. Evaluate the formulation stability using the following criteria. The results are shown in the "Formulation Stability" column of Tables 3 and 4.

[0111] · Evaluation Criteria for Formulation Stability (Composition Containing First Treatment Agent and Composition Containing Second Treatment Agent) ◎ (Qualified): No separation × (Unqualified): Separation occurs Test Category 9 (Preparation of Composition Containing Treatment Agent Composed of Composition Containing First Treatment Agent and Composition Containing Second Treatment Agent) (Example 33) As shown in Table 5, mix 50% (parts) of the composition (I-1) containing the first treatment agent and 50% (parts) of the composition (II-1) containing the second treatment agent to prepare the composition containing the treatment agent of Example 33.

[0112] (Examples 34 to 60) In the same manner as in Example 33, the composition containing the first treating agent and the composition containing the second treating agent shown in Table 5 were mixed to prepare the treating agent-containing compositions for each example.

[0113] The types and mass ratios of the composition containing the first treating agent and the types and mass ratios of the composition containing the second treating agent are shown in the columns of "Composition Containing the First Treating Agent" and "Composition Containing the Second Treating Agent" in Table 5, respectively.

[0114] [Table 5]

[0115] Test Category 10 (Evaluation of the Treating Agent-Containing Composition in Two Dosage Forms) Using the obtained treating agent-containing compositions for each example, the evaluation of the peeling and foaming properties test, emulsion stability, and carding property was carried out in the same manner as in Example 1. The results are shown in the columns of "Peeling and Foaming Properties Test", "Emulsion Stability", and "Carding Property" in Table 5, respectively.

[0116] From the evaluation results of each example in each table with respect to the comparative example, it can be clearly seen that the treating agent of the present invention can reduce the deterioration of water peeling and foaming of water in the hydroentangling step when using the fiber imparted with the treating agent. In addition, the emulsion stability of the dilution of the treating agent can be improved. In addition, the carding property when using the fiber imparted with the treating agent during carding can be improved.

[0117] The present disclosure also includes the following aspects. (Appendix 1) A treating agent for rayon hydroentangling, characterized in that it contains a nonionic surfactant (X), the above nonionic surfactant (X) includes the following ether monoester derivative (A) and the following ether diester derivative (B);

[0118] Ether monoester derivative (A): A compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or more and 3 or less carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms;

[0119] Ether diester derivative (B): A compound obtained by esterifying a compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or more and 3 or less carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms.

[0120] (Appendix 2) The treating agent for rayon hydroentangling as described in Appendix 1, wherein When the total of the content ratios of the above-mentioned ether monoester derivative (A) and the above-mentioned ether diester derivative (B) is set to 100 parts by mass, the content of the above-mentioned ether monoester derivative (A) is 10 parts by mass or more and 90 parts by mass or less, and the content of the above-mentioned ether diester derivative (B) is 10 parts by mass or more and 90 parts by mass or less.

[0121] (Appendix 3) The treating agent for rayon hydroentangled nonwoven fabric as described in Appendix 1, wherein the treating agent for rayon hydroentangled nonwoven fabric further contains an anionic surfactant (C).

[0122] (Appendix 4) The treating agent for rayon hydroentangled nonwoven fabric as described in Appendix 1, wherein the treating agent for rayon hydroentangled nonwoven fabric further contains an anionic surfactant (C), When the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), and the above-mentioned anionic surfactant (C) is set to 100 parts by mass, the content of the above-mentioned ether monoester derivative (A) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned ether diester derivative (B) is 10 parts by mass or more and 85 parts by mass or less, and the content of the above-mentioned anionic surfactant (C) is 0.1 part by mass or more and 20 parts by mass or less.

[0123] (Appendix 5) The treating agent for rayon hydroentangled nonwoven fabric as described in Appendix 1, wherein the treating agent for rayon hydroentangled nonwoven fabric further contains the following fatty acids (D);

[0124] Fatty acids (D): at least one selected from fatty acids and oils having 12 to 24 carbon atoms. (Appendix 6) The treating agent for rayon hydroentangled nonwoven fabric as described in Appendix 1, wherein the treating agent for rayon hydroentangled nonwoven fabric further contains an anionic surfactant (C) and the following fatty acids (D), When the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), and the above-mentioned fatty acids (D) is set to 100 parts by mass, the content of the above-mentioned ether monoester derivative (A) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned ether diester derivative (B) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned anionic surfactant (C) is 0.1 part by mass or more and 20 parts by mass or less, and the content of the above-mentioned fatty acids (D) is 0.1 part by mass or more and 10 parts by mass or less;

[0125] Fatty acids (D): at least one selected from fatty acids and oils having 12 to 24 carbon atoms. (Appendix 7) The treating agent for rayon spunlace as described in Appendix 1, wherein, the treating agent for rayon spunlace further contains a polyol (E).

[0126] (Appendix 8) The treating agent for rayon spunlace as described in Appendix 1, wherein, the treating agent for rayon spunlace further contains an anionic surfactant (C), the following fatty acids (D), and a polyol (E), when the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), the above-mentioned fatty acids (D), and the above-mentioned polyol (E) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether diester derivative (B), 0.1 part by mass or more and 20 parts by mass or less of the above-mentioned anionic surfactant (C), 0.1 part by mass or more and 10 parts by mass or less of the above-mentioned fatty acids (D), and 0.1 part by mass or more and 70 parts by mass or less of the above-mentioned polyol (E);

[0127] Fatty acids (D): at least one selected from fatty acids and oils having 12 or more and 24 or less carbon atoms. (Appendix 9) The treating agent for rayon spunlace as described in Appendix 1, wherein, the treating agent for rayon spunlace further contains the following lubricant (F);

[0128] Lubricant (F): at least one selected from hydrocarbons, esters excluding oils and fats, and silicones. (Appendix 10) The treating agent for rayon spunlace as described in Appendix 1, wherein, the treating agent for rayon spunlace further contains an anionic surfactant (C), the following fatty acids (D), a polyol (E), and the following lubricant (F), When the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), the above-mentioned fatty acids (D), the above-mentioned polyhydric alcohol (E), and the above-mentioned lubricant (F) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above-mentioned ether diester derivative (B), 0.1 part by mass or more and 20 parts by mass or less of the above-mentioned anionic surfactant (C), 0.1 part by mass or more and 10 parts by mass or less of the above-mentioned fatty acids (D), 0.1 part by mass or more and 70 parts by mass or less of the above-mentioned polyhydric alcohol (E), and 1 part by mass or more and 20 parts by mass or less of the above-mentioned lubricant (F);

[0129] Fatty acids (D): at least one selected from fatty acids and fats and oils having 12 to 24 carbon atoms; Lubricant (F): at least one selected from hydrocarbons, esters excluding fats and oils, and silicones.

[0130] (Appendix 11) A treating agent for rayon hydroentangling as described in Appendix 1, wherein, It is composed of a first treating agent for rayon hydroentangling and a second treating agent for rayon hydroentangling in a group, The above-mentioned first treating agent for rayon hydroentangling contains the above-mentioned ether monoester derivative (A) and the above-mentioned ether diester derivative (B), and further optionally contains the following fatty acids (D) and optionally contains the following lubricant (F), The above-mentioned second treating agent for rayon hydroentangling contains at least one selected from anionic surfactant (C) and polyhydric alcohol (E),

[0131] Fatty acids (D): at least one selected from fatty acids and fats and oils having 12 to 24 carbon atoms; Lubricant (F): at least one selected from hydrocarbons, esters excluding fats and oils, and silicones.

[0132] (Appendix 12) A composition containing a treating agent for rayon hydroentangling, characterized in that, It contains the treating agent for rayon hydroentangling described in any one of Appendices 1 to 11 and the following solvent (S), When the total of the content ratios of the above-mentioned treating agent for rayon hydroentangling and the above-mentioned solvent (S) is set to 100 parts by mass, it contains 10 parts by mass or more and 99.99 parts by mass or less of the above-mentioned treating agent for rayon hydroentangling and 0.01 part by mass or more and 90 parts by mass or less of the above-mentioned solvent (S);

[0133] Solvent (S): A solvent with a boiling point of 105 °C or lower at atmospheric pressure. (Appendix 13) A composition containing a treatment agent for rayon spunlace as described in Appendix 12, wherein the above solvent (S) is water.

[0134] (Appendix 14) A first treatment agent for rayon spunlace, characterized in that the above first treatment agent for rayon spunlace is used in combination with a second treatment agent for rayon spunlace or a composition containing the second treatment agent for rayon spunlace, the above second treatment agent for rayon spunlace contains at least one selected from anionic surfactants (C) and polyhydric alcohols (E), the above composition containing the second treatment agent for rayon spunlace contains the above second treatment agent for rayon spunlace and the following solvent (S), contains the following ether monoester derivative (A) and the following ether diester derivative (B), and further optionally contains the following fatty acids (D), and optionally contains the following lubricant (F);

[0135] Ether monoester derivative (A): A compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms.

[0136] Ether diester derivative (B): A compound obtained by esterifying a compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 or 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms.

[0137] Fatty acids (D): At least one selected from fatty acids having 12 or more and 24 or less carbon atoms and oils and fats. Lubricant (F): At least one selected from hydrocarbons, esters excluding oils and fats, and silicones.

[0138] Solvent (S): A solvent with a boiling point of 105 °C or lower at atmospheric pressure. (Appendix 15) A composition containing a first treatment agent for rayon spunlace, characterized in that it contains the first treatment agent for rayon spunlace described in Appendix 14 and the following solvent (S);

[0139] Solvent (S): A solvent with a boiling point of 105 °C or lower at atmospheric pressure. (Appendix 16) A method for manufacturing a spunlace nonwoven fabric, characterized in that, through the following steps 1 to 3,

[0140] Step 1: Attach the rayon spunlace treatment agent described in any one of Appendices 1 to 11 to rayon; Step 2: Use the rayon obtained in Step 1 in the carding process to manufacture a carded web;

[0141] Step 3: Interlace the carded web obtained in Step 2 with water flow to obtain a spunlace nonwoven fabric.

Claims

1. A treating agent for rayon spunlace, characterized in that, Containing a nonionic surfactant (X) and the following fatty acids (D), The above nonionic surfactant (X) contains the following ether monoester derivative (A) and the following ether diester derivative (B), Ether monoester derivative (A): A compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, Ether diester derivative (B): A compound formed by esterifying a compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, excluding polyethylene glycol dilaurate, Fatty acids (D): At least one selected from fatty acids having 12 or more and 24 or less carbon atoms and oils and fats, 2. A treating agent for rayon spunlace, characterized in that, Containing a nonionic surfactant (X) and a polyol (E) excluding esters, The above nonionic surfactant (X) contains the following ether monoester derivative (A) and the following ether diester derivative (B), Ether monoester derivative (A): A compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, Ether diester derivative (B): A compound formed by esterifying a compound formed by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms with 1 mole of a fatty acid having 12 or more and 24 or less carbon atoms, excluding polyethylene glycol dilaurate.

3. The treating agent for rayon spunlace according to claim 1, wherein, When the total content ratio of the above ether monoester derivative (A) and the above ether diester derivative (B) is set to 100 parts by mass, it contains 10 parts by mass or more and 90 parts by mass or less of the above ether monoester derivative (A), and 10 parts by mass or more and 90 parts by mass or less of the above ether diester derivative (B).

4. The treating agent for rayon spunlace according to claim 1, wherein, The above treatment agent for rayon spunlace further contains an anionic surfactant (C).

5. The treating agent for rayon spunlace according to claim 1, wherein, The above treatment agent for rayon spunlace further contains an anionic surfactant (C), When the total content ratio of the above ether monoester derivative (A), the above ether diester derivative (B), and the above anionic surfactant (C) is set to 100 parts by mass, it contains 10 parts by mass or more and 85 parts by mass or less of the above ether monoester derivative (A), 10 parts by mass or more and 85 parts by mass or less of the above ether diester derivative (B), and 0.1 parts by mass or more and 20 parts by mass or less of the above anionic surfactant (C).

6. The treating agent for rayon spunlace according to claim 1, wherein, The above treatment agent for rayon spunlace further contains an anionic surfactant (C), When the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), and the above-mentioned fatty acids (D) is set to 100 parts by mass, the content of the above-mentioned ether monoester derivative (A) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned ether diester derivative (B) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned anionic surfactant (C) is 0.1 parts by mass or more and 20 parts by mass or less, and the content of the above-mentioned fatty acids (D) is 0.1 parts by mass or more and 10 parts by mass or less.

7. The treating agent for rayon spunlace according to claim 1, wherein, The above-mentioned treatment agent for rayon hydroentangled fabric further contains an anionic surfactant (C) and a polyol (E) excluding esters. When the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), the above-mentioned fatty acids (D), and the above-mentioned polyol (E) is set to 100 parts by mass, the content of the above-mentioned ether monoester derivative (A) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned ether diester derivative (B) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned anionic surfactant (C) is 0.1 parts by mass or more and 20 parts by mass or less, the content of the above-mentioned fatty acids (D) is 0.1 parts by mass or more and 10 parts by mass or less, and the content of the above-mentioned polyol (E) is 0.1 parts by mass or more and 70 parts by mass or less.

8. The treating agent for rayon spunlace according to claim 1, wherein, The above-mentioned treatment agent for rayon hydroentangled fabric further contains the following lubricant (F). Lubricant (F): at least one selected from hydrocarbons, esters excluding fats and oils, and silicones.

9. The treating agent for rayon spunlace according to claim 1, wherein, The above-mentioned treatment agent for rayon hydroentangled fabric further contains an anionic surfactant (C), a polyol (E) excluding esters, and the following lubricant (F). When the total of the content ratios of the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), the above-mentioned anionic surfactant (C), the above-mentioned fatty acids (D), the above-mentioned polyol (E), and the above-mentioned lubricant (F) is set to 100 parts by mass, the content of the above-mentioned ether monoester derivative (A) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned ether diester derivative (B) is 10 parts by mass or more and 85 parts by mass or less, the content of the above-mentioned anionic surfactant (C) is 0.1 parts by mass or more and 20 parts by mass or less, the content of the above-mentioned fatty acids (D) is 0.1 parts by mass or more and 10 parts by mass or less, the content of the above-mentioned polyol (E) is 0.1 parts by mass or more and 70 parts by mass or less, and the content of the above-mentioned lubricant (F) is 1 part by mass or more and 20 parts by mass or less. Lubricant (F): at least one selected from hydrocarbons, esters excluding fats and oils, and silicones.

10. The treating agent for rayon spunlace according to claim 1, wherein, It is composed of a first treatment agent for rayon hydroentangled fabric and a second treatment agent for rayon hydroentangled fabric in a set. The above-mentioned first treatment agent for rayon hydroentangled fabric contains the above-mentioned ether monoester derivative (A), the above-mentioned ether diester derivative (B), and the above-mentioned fatty acids (D), and further optionally contains the following lubricant (F). The above-mentioned second treatment agent for rayon hydroentangled fabric contains at least one selected from an anionic surfactant (C) and a polyol (E) excluding esters. Lubricant (F): selected from at least one of hydrocarbons, esters excluding fats and oils, and silicones.

11. A composition containing a treatment agent for rayon spunlace, characterized in that, Containing the treating agent for rayon spunlace according to any one of claims 1 to 10, and the following solvent (S), When the total content ratio of the treating agent for rayon spunlace and the above solvent (S) is set to 100 parts by mass, it contains 10 parts by mass or more and 99.99 parts by mass or less of the treating agent for rayon spunlace, and 0.01 parts by mass or more and 90 parts by mass or less of the solvent (S), Solvent (S): a solvent having a boiling point of 105°C or lower at atmospheric pressure.

12. The composition containing a treatment agent for rayon spunlace according to claim 11, wherein, The above solvent (S) is water.

13. A first treatment agent for rayon spunlace, characterized in that, The first treating agent for rayon spunlace is used in combination with the second treating agent for rayon spunlace or a composition containing the second treating agent for rayon spunlace, The second treating agent for rayon spunlace contains at least one selected from anionic surfactants (C) and polyols (E) excluding esters, The composition containing the second treating agent for rayon spunlace contains the second treating agent for rayon spunlace and the following solvent (S), The first treating agent for rayon spunlace contains the following ether monoester derivative (A), the following ether diester derivative (B), and the following fatty acids (D), and further optionally contains the following lubricant (F), Ether monoester derivative (A): a compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mole of a fatty acid having 12 to 24 carbon atoms, Ether diester derivative (B): a compound obtained by esterifying a compound obtained by adding a total of 1 mole or more and 30 moles or less of an alkylene oxide having 2 to 3 carbon atoms to 1 mole of a fatty acid having 12 to 24 carbon atoms with 1 mole of a fatty acid having 12 to 24 carbon atoms, excluding polyethylene glycol dilaurate, Fatty acids (D): selected from at least one of fatty acids having 12 to 24 carbon atoms and fats and oils, Lubricant (F): selected from at least one of hydrocarbons, esters excluding fats and oils, and silicones, Solvent (S): a solvent having a boiling point of 105°C or lower at atmospheric pressure.

14. A composition containing the first treatment agent for rayon spunlace, characterized in that ， Containing the first treating agent for rayon spunlace according to claim 13, and the following solvent (S), Solvent (S): a solvent having a boiling point of 105°C or lower at atmospheric pressure.

15. A method for manufacturing a spunlace nonwoven fabric, characterized in that, Through the following steps 1 to 3, Step 1: Attach the treating agent for rayon spunlace according to any one of claims 1 to 10 to rayon, Step 2: Use the rayon obtained in Step 1 in a carding process to produce a card web, Step 3: Interlace the card web obtained in Step 2 with water flow to obtain a spunlace nonwoven fabric.

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