WO2024095790A1

WO2024095790A1 - Rayon spunlace treatment agent, composition containing rayon spunlace treatment agent, rayon spunlace first treatment agent, composition containing rayon spunlace first treatment agent, and method for manufacturing spunlace nonwoven fabric

Info

Publication number: WO2024095790A1
Application number: PCT/JP2023/037947
Authority: WO
Inventors: 享治夏目
Original assignee: 竹本油脂株式会社
Priority date: 2022-10-31
Filing date: 2023-10-20
Publication date: 2024-05-10
Also published as: JP2024065397A; TW202419705A; JP7311196B1; TWI843671B

Abstract

The present invention addresses the problem of providing a rayon spunlace treatment agent that is configured to reduce worsening of water dropping/bubbling in a spunlace step in which fibers onto which a rayon spunlace treatment agent has been applied are used, even if the drying temperature in a fiber drying step, which is conducted before a carding step, is high. A rayon spunlace treatment agent according to the present invention contains: a non-ionic surfactant (X) containing a specific ether monoester derivative (A) and a specific ether diester derivative (B); and a specific fatty acid (D) or polyalcohol (E).

Description

Treatment agent for rayon spunlace, composition containing treatment agent for rayon spunlace, first treatment agent for rayon spunlace, composition containing first treatment agent for rayon spunlace, and method for producing spunlace nonwoven fabric

The present invention relates to a treatment agent for rayon spunlace that can reduce the deterioration of water-dropping bubbles in the spunlace process using fibers to which the treatment agent for rayon spunlace is applied, a composition containing the treatment agent for rayon spunlace, a first treatment agent for rayon spunlace, a composition containing the first treatment agent for rayon spunlace, and a method for producing a spunlace nonwoven fabric.

　Natural fibers such as cotton, regenerated fibers such as rayon, and synthetic resins such as polyolefins are known as raw materials for nonwoven fabrics. Among them, rayon, a regenerated fiber made from pulp and cotton linters, has attracted attention for its excellent biodegradability, hygroscopicity, and water absorption properties. When spunlace nonwoven fabric is manufactured using rayon, a treatment may be carried out in which a rayon spunlace treatment agent containing a surfactant is applied to the surface of the raw fiber to impart various properties such as carding ability.

　Traditionally, the treatment agents for rayon spunlace disclosed in Patent Documents 1 and 2 are known. Patent Document 1 discloses a treatment agent for short fibers that contains a fatty acid derivative having a structure in which alkylene oxide is added to a fatty acid, at least one selected from fatty acids and oils and fats, and a polyhydric alcohol. Patent Document 2 discloses a fiber treatment agent for spunlace that contains a polyoxyalkylene derivative in which ethylene oxide is added to a fatty acid, and a function-imparting agent that is a specified fatty acid and/or oil.

Patent No. 6533020 Japanese Patent No. 6132966

However, conventional rayon spunlace treatment agents had a problem in that when fibers with rayon spunlace treatment agents attached were passed through the spunlace process, the water used in the spunlace process was prone to falling off and foaming (i.e., the water used for hydroentanglement was prone to foaming due to the mixing of treatment agents that had fallen off the fibers). In particular, there was a problem in that if the drying temperature was high in the fiber drying process carried out before the carding process, the falling off of water and foaming in the spunlace process worsened.

As a result of research conducted by the inventors to solve the above problems, they discovered that a combination of a specific ether monoester derivative (A) and an ether diester derivative (B) is suitable for use in a rayon spunlace treatment agent.

Various aspects for solving the above problems will be described below.
The rayon spunlace treatment agent of the first embodiment is characterized by containing a nonionic surfactant (X) including the following ether monoester derivative (A) and the following ether diester derivative (B), and the following fatty acid (D). The ether monoester derivative (A) is a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per 1 mol of fatty acid having 12 to 24 carbon atoms. The ether diester derivative (B) is a compound in which a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per 1 mol of fatty acid having 12 to 24 carbon atoms and 1 mol of fatty acid having 12 to 24 carbon atoms are esterified, except for polyethylene glycol dilaurate. The fatty acid (D) is at least one selected from fatty acids having 12 to 24 carbon atoms and oils and fats.

The rayon spunlace treatment agent of embodiment 2 contains a nonionic surfactant (X) including the following ether monoester derivative (A) and the following ether diester derivative (B), and a polyhydric alcohol (E) (excluding esters). The ether monoester derivative (A) is a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per mol of fatty acid having 12 to 24 carbon atoms. The ether diester derivative (B) is a compound in which a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per mol of fatty acid having 12 to 24 carbon atoms is esterified with 1 mol of fatty acid having 12 to 24 carbon atoms, except for polyethylene glycol dilaurate.

In aspect 3, the treatment agent for rayon spunlace in aspect 1 or 2 contains the ether monoester derivative (A) in an amount of 10 parts by mass to 90 parts by mass and the ether diester derivative (B) in an amount of 10 parts by mass to 90 parts by mass, when the total content of the ether monoester derivative (A) and the ether diester derivative (B) is 100 parts by mass.

In embodiment 4, the treating agent for rayon spunlace of embodiment 1 further contains an anionic surfactant (C).
In aspect 5, the treatment agent for rayon spunlace of aspect 1 further contains an anionic surfactant (C), and when the total content of the ether monoester derivative (A), the ether diester derivative (B), and the anionic surfactant (C) is 100 parts by mass, the treatment agent contains the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, and the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less.

In aspect 6, the rayon spunlace treatment agent of aspect 1 further contains an anionic surfactant (C), and when the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), and the fatty acids (D) is 100 parts by mass, the agent contains the ether monoester derivative (A) in an amount of 10 parts by mass to 85 parts by mass, the ether diester derivative (B) in an amount of 10 parts by mass to 85 parts by mass, the anionic surfactant (C) in an amount of 0.1 parts by mass to 20 parts by mass, and the fatty acids (D) in an amount of 0.1 parts by mass to 10 parts by mass.

In aspect 7, the rayon spunlace treatment agent of aspect 1 further contains an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters), and when the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acids (D), and the polyhydric alcohol (E) is 100 parts by mass, the ether monoester derivative (A) is 10 parts by mass to 85 parts by mass, the ether diester derivative (B) is 10 parts by mass to 85 parts by mass, the anionic surfactant (C) is 0.1 parts by mass to 20 parts by mass, the fatty acids (D) are 0.1 parts by mass to 10 parts by mass, and the polyhydric alcohol (E) is 0.1 parts by mass to 70 parts by mass.

In aspect 8, the rayon spunlace treatment agent of aspect 1, 2, or 4 further contains the following lubricant (F). The lubricant (F) is at least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.

In aspect 9, the rayon spunlace treatment agent of aspect 1 further contains an anionic surfactant (C), a polyhydric alcohol (E) (excluding esters), and the following lubricant (F), and when the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acids (D), the polyhydric alcohol (E), and the lubricant (F) is 100 parts by mass, the ether monoester derivative (A) is contained in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) is contained in an amount of 10 parts by mass or more and 85 parts by mass or less, the anionic surfactant (C) is contained in an amount of 0.1 parts by mass or more and 20 parts by mass or less, the fatty acids (D) are contained in an amount of 0.1 parts by mass or more and 10 parts by mass or less, the polyhydric alcohol (E) is contained in an amount of 0.1 parts by mass or more and 70 parts by mass or less, and the lubricant (F) is contained in an amount of 1 part by mass or more and 20 parts by mass or less. The lubricant (F) is at least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.

In aspect 10, the rayon spunlace treatment agent of aspect 1 is configured as a set of a first treatment agent for rayon spunlace that contains the ether monoester derivative (A), the ether diester derivative (B), and the fatty acids (D), and optionally further contains the following lubricant (F), and a second treatment agent for rayon spunlace that contains at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters). The lubricant (F) is at least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.

The composition containing a treatment agent for rayon spunlace of embodiment 11 contains the treatment agent for rayon spunlace of any one of embodiments 1 to 10, and the following solvent (S), and contains the treatment agent for rayon spunlace in an amount of 10 parts by mass or more and 99.99 parts by mass or less and the solvent (S) in an amount of 0.01 parts by mass or more and 90 parts by mass or less, assuming that the total content of the treatment agent for rayon spunlace and the solvent (S) is 100 parts by mass. The solvent (S) has a boiling point of 105°C or less at atmospheric pressure.

In a twelfth aspect, the solvent (S) in the composition containing a treatment agent for rayon spunlace according to the eleventh aspect is water.
The first treating agent for rayon spunlace of aspect 13 is characterized in that it is used in combination with a second treating agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters), or a second treating agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters), and a second treating agent-containing composition for rayon spunlace containing a solvent (S) described below, and contains an ether monoester derivative (A) described below, an ether diester derivative (B) described below, and a fatty acid (D) described below, and further optionally contains a lubricant (F) described below. The ether monoester derivative (A) is a compound in which a total of 1 mole to 30 moles of alkylene oxide having 2 to 3 carbon atoms are added per mole of a fatty acid having 12 to 24 carbon atoms. The ether diester derivative (B) is a compound obtained by esterifying a compound in which a total of 1 to 30 moles of alkylene oxide having 2 to 3 carbon atoms are added per mole of fatty acid having 12 to 24 carbon atoms, and 1 mole of fatty acid having 12 to 24 carbon atoms, except for polyethylene glycol dilaurate. The fatty acid (D) is at least one selected from fatty acids having 12 to 24 carbon atoms and oils and fats. The lubricant (F) is at least one selected from hydrocarbon compounds, esters (excluding oils and fats), and silicones. The solvent (S) has a boiling point of 105° C. or less at atmospheric pressure.

The composition containing the first treatment agent for rayon spunlace of aspect 14 is characterized by containing the first treatment agent for rayon spunlace of aspect 13 and the following solvent (S). The solvent (S) is a solvent having a boiling point of 105°C or less at atmospheric pressure.

The method for producing the spunlace nonwoven fabric of aspect 15 is characterized by the following steps 1 to 3. Step 1 is a step of attaching the rayon spunlace treatment agent of any one of aspects 1 to 10 to rayon. Step 2 is a step of subjecting the rayon obtained in step 1 to a carding process to produce a web. Step 3 is a step of entangling the web obtained in step 2 with a water flow to obtain a spunlace nonwoven fabric.

According to the present invention, even if the drying temperature is high in the fiber drying process carried out before the carding process, it is possible to reduce the deterioration of water dropout and foaming in the spunlace process using fibers treated with a rayon spunlace treatment agent.

First Embodiment
A first embodiment of the treatment agent for rayon spunlace (hereinafter, also referred to as the treatment agent) of the present invention will be described below. The treatment agent of this embodiment contains a nonionic surfactant (X) containing a specific ether monoester derivative (A) and a specific ether diester derivative (B).

(Nonionic Surfactant (X))
The nonionic surfactant (X) used in the treatment agent of this embodiment contains, as essential components, a specific ether monoester derivative (A) and a specific ether diester derivative (B). By using the ether monoester derivative (A) and the ether diester derivative (B) described later in combination, it is possible to reduce deterioration of water dropout and foaming in the spunlace process using fibers to which the treatment agent has been applied, even when the drying temperature is high in the fiber drying process carried out before the carding process.

(Ether monoester derivative (A))
The ether monoester derivative (A) used in this embodiment is a compound in which a total of 1 mol to 30 mol of an alkylene oxide having 2 to 3 carbon atoms is added per 1 mol of a fatty acid having 12 to 24 carbon atoms. The ether monoester derivative (A) has a monoester structure in which a fatty acid is ester-bonded to one end of a polyoxyalkylene chain in which an alkylene oxide having 2 to 3 carbon atoms is polymerized.

As the fatty acid used as the raw material for the ether monoester derivative (A), any known fatty acid can be appropriately used, and it may be a saturated fatty acid or an unsaturated fatty acid. In addition, it may be a straight-chain fatty acid or a fatty acid having a branched chain structure.

Specific examples of fatty acids 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), and tetracosanoic acid; and (2) fatty acids having a monovalent branched chain structure, such as isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid. (3) fatty acids having a monovalent linear alkenyl group, such as myristoleic acid, palmitoleic acid, oleic acid, vaccenic acid, eicosenoic acid, linoleic acid, α-linolenic acid, γ-linolenic acid, and arachidonic acid; (4) hydroxycarboxylic acids, such as ricinoleic acid; and (5) naturally occurring fatty acids, such as castor oil fatty acid, sesame oil fatty acid, tall oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid, palm oil fatty acid, palm kernel fatty acid, and coconut oil fatty acid.

Specific examples of alkylene oxides having 2 to 3 carbon atoms, which are used as raw materials for the ether monoester derivative (A), include ethylene oxide and propylene oxide. The number of moles of alkylene oxide added is 1 to 30 moles, preferably 5 to 25 moles. Any combination of the upper and lower limits above is also possible. The number of moles of alkylene oxide added indicates the number of moles of alkylene oxide per mole of the compound to be added in the raw material. As for the alkylene oxide, one type of alkylene oxide may be used alone, or two types of alkylene oxides may be used in appropriate combination. When two types of alkylene oxide are used, the addition form may be any of block addition, random addition, and a combination of block addition and random addition, and is not particularly limited.

Specific examples of ether monoester derivatives (A) include a compound in which 10 moles of alkylene oxide are added to 1 mole of stearic acid, a compound in which 5 moles of alkylene oxide are added to 1 mole of stearic acid, a compound in which 20 moles of alkylene oxide are added to 1 mole of oleic acid, a compound in which 13 moles of alkylene oxide are added to 1 mole of oleic acid, a compound in which 10 moles of alkylene oxide are added to 1 mole of oleic acid, a compound in which 5 moles of alkylene oxide are added to 1 mole of oleic acid, a compound in which 10 moles of alkylene oxide are added to 1 mole of palmitic acid, a compound in which 1 mole of alkylene oxide is added to 1 mole of lauric acid, a compound in which 10 moles of alkylene oxide are added to 1 mole of coconut fatty acid; a compound in which 5 moles of ethylene oxide and 10 moles of propylene oxide are randomly added to 1 mole of stearic acid; a compound in which 10 moles of ethylene oxide and 5 moles of propylene oxide are randomly added to 1 mole of stearic acid; a compound in which 5 moles of ethylene oxide are added to 1 mole of stearic acid and then 10 moles of propylene oxide are added; a compound in which 10 moles of ethylene oxide are added to 1 mole of stearic acid and then 5 moles of propylene oxide are added; and the like.

These ether monoester derivatives (A) may be used alone or in appropriate combination of two or more.
(Ether diester derivative (B))
The ether diester derivative (B) used in this embodiment is a compound obtained by esterifying a compound in which a total of 1 to 30 moles of alkylene oxide having 2 to 3 carbon atoms are added per mole of fatty acid having 12 to 24 carbon atoms, and 1 mole of fatty acid having 12 to 24 carbon atoms, except for polyethylene glycol dilaurate. The ether diester derivative (B) has a diester structure in which fatty acids are ester-bonded to both ends of a polyoxyalkylene chain in which alkylene oxide having 2 to 3 carbon atoms is polymerized. The two fatty acids constituting the ether diester derivative (B) may be the same or different.

Specific examples of fatty acids serving as raw materials for the ether diester derivative (B) are the same as the specific examples of fatty acids explained as raw materials for the ether monoester derivative (A).
Specific examples of the alkylene oxide having 2 to 3 carbon atoms as a raw material for the ether diester derivative (B) are the same as the specific examples of the alkylene oxide having 2 to 3 carbon atoms described as a raw material for the ether monoester derivative (A).

Specific examples of the ether diester derivative (B) include a compound obtained by adding 14 moles of alkylene oxide to 1 mole of oleic acid, followed by the addition of 1 mole of oleic acid, a compound obtained by adding 23 moles of alkylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid, a compound obtained by adding 9 moles of alkylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid, a compound obtained by adding 5 moles of alkylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid, a compound obtained by adding 9 ...lauric acid, and a compound obtained by adding 1 mole of lauric acid. Examples of the compound include a compound in which 5 moles of ethylene oxide and 10 moles of propylene oxide are randomly added to 1 mole of ethyl acetate, and then 1 mole of stearic acid is added; a compound in which 10 moles of ethylene oxide and 5 moles of propylene oxide are randomly added to 1 mole of stearic acid, and then 1 mole of stearic acid is added; a compound in which 5 moles of ethylene oxide are added to 1 mole of stearic acid, and then 10 moles of propylene oxide are added, and then 1 mole of stearic acid is added; a compound in which 10 moles of ethylene oxide are added to 1 mole of stearic acid, and then 5 moles of propylene oxide are added, and then 1 mole of stearic acid is added.

These ether diester derivatives (B) may be used alone or in appropriate combination of two or more.
In the treatment agent, the lower limit of the content of the ether monoester derivative (A) is preferably 5% by mass or more, more preferably 10% by mass or more. When the content of the ether monoester derivative (A) is 5% by mass or more, the deterioration of water dropout and foaming in the spunlace process using the fiber to which the treatment agent is applied can be further reduced. In addition, the upper limit of the content of the ether monoester derivative (A) is preferably 95% by mass or less, more preferably 90% by mass or less. When the content of the ether monoester derivative (A) is 95% by mass or less, the deterioration of water dropout and foaming in the spunlace process using the fiber to which the treatment agent is applied can be further reduced. In addition, a range in which the above upper and lower limits are arbitrarily combined is also assumed.

In the treatment agent, the lower limit of the content of the ether diester derivative (B) is preferably 5% by mass or more, and more preferably 10% by mass or more. When the content of the ether diester derivative (B) is 5% by mass or more, the deterioration of water-dropping and foaming in the spunlace process using the fiber to which the treatment agent is applied can be further reduced. Furthermore, the upper limit of the content of the ether diester derivative (B) is preferably 95% by mass or less, and more preferably 90% by mass or less. When the content of the ether diester derivative (B) is 95% by mass or less, the deterioration of water-dropping and foaming in the spunlace process using the fiber to which the treatment agent is applied can be further reduced. Note that ranges that combine the above upper and lower limits in any way are also envisioned.

If the total content of the ether monoester derivative (A) and the ether diester derivative (B) in the treatment agent is 100 parts by mass, it is preferable that the ether monoester derivative (A) is contained in an amount of 10 parts by mass to 90 parts by mass, and the ether diester derivative (B) is contained in an amount of 10 parts by mass to 90 parts by mass. By specifying the amount within such a range, it is possible to further reduce the deterioration of water-shedding bubbles in the spunlace process using the fibers to which the treatment agent is applied. Note that any combination of the upper and lower limits above is also contemplated.

(Other nonionic surfactants)
The treatment agent of the present embodiment may contain, as the nonionic surfactant (X), a nonionic surfactant other than the above-mentioned ether monoester derivative (A) and ether diester derivative (B).

As other nonionic surfactants, known surfactants can be appropriately used. Specific examples of other nonionic surfactants include, for example, (1) compounds in which an alkylene oxide having 2 to 4 carbon atoms is added to an organic acid, an organic alcohol, an organic amine, and/or an organic amide, such as polyoxyethylene octyl ether, polyoxyethylene stearyl ether, polyoxyethylene lauryl ether, polyoxyethylene lauryl ether methyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxypropylene lauryl ether methyl ether, polyoxyethylene oleyl ether, polyoxybutylene oleyl ether, polyoxyethylene 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, compounds in which ethylene oxide is added to secondary dodecyl alcohol, polyoxyethylene tridecyl ether, polyoxyalkylene tetradecyl ether, polyoxyethylene tridecyl ether, polyoxyethylene tetra ... ether-type nonionic surfactants such as decyl ether, polyoxyethylene lauryl amino ether, polyoxyethylene lauramide ether, and polyoxyalkylene tristyrenated phenyl ether; (2) polyoxyalkylene polyhydric alcohol fatty acid ester-type nonionic surfactants such as polyoxyalkylene sorbitan trioleate, polyoxyalkylene sorbitan monostearate, polyoxyalkylene sorbitan tristearate, polyoxyalkylene hydrogenated castor oil trioctanate, and polyoxyalkylene hydrogenated castor oil maleate, stearate, or oleate; (3) alkylamide-type nonionic surfactants such as stearic acid diethanolamide and diethanolamine monolauroamide; (4) polyoxyalkylene fatty acid amide-type nonionic surfactants such as polyoxyethylene diethanolamine monooleylamide, polyoxyethylene laurylamine, and polyoxyethylene tallow amine; and (5) ether/ester compounds such as copolymers of polyoxyethylene, dimethyl phthalate, and lauryl alcohol.

These nonionic surfactants may be used alone or in appropriate combination of two or more kinds.
(Anionic Surfactant (C))
The treatment agent of the present embodiment may further contain an anionic surfactant (C). When the treatment agent contains the anionic surfactant (C), the emulsion stability of the diluted solution in which the treatment agent is diluted with a solvent can be improved.

As the anionic surfactant (C), known surfactants can be appropriately used. Specific examples of the anionic surfactant (C) include, for example, (1) phosphate salts of fatty alcohols, such as lauryl phosphate salts, cetyl phosphate salts, isocetyl phosphate salts, octyl phosphate salts, oleyl phosphate salts, and stearyl phosphate salts; and (2) fatty alcohols, such as polyoxyethylene lauryl ether phosphate salts, polyoxyethylene oleyl ether phosphate salts, and polyoxyethylene stearyl ether phosphate salts, which are combined with at least one of ethylene oxide and propylene oxide. (3) aliphatic or aromatic sulfonates such as lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate, tetradecane sulfonate, dodecylbenzene sulfonate, secondary alkane sulfonate (having 13 to 15 carbon atoms), secondary alkane sulfonate (having 11 to 14 carbon atoms), and α-olefin sulfonate; (4) sulfates of aliphatic alcohols such as lauryl sulfate, oleyl sulfate, and stearyl sulfate. (5) sulfates of aliphatic alcohols to which at least one alkylene oxide selected from ethylene oxide and propylene oxide has been added, such as polyoxyethylene lauryl ether sulfate, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate, and polyoxyethylene oleyl ether sulfate; (6) castor oil fatty acid sulfate, sesame oil fatty acid sulfate, tall oil fatty acid sulfate, soybean oil fatty acid sulfate, rapeseed oil fatty acid sulfate, palm Examples of the sulfate ester salts include fatty acid sulfate salts such as oil fatty acid sulfate salts, (7) sulfate ester salts of oils and fats such as castor oil sulfate salts, sesame oil sulfate salts, tall oil sulfate salts, soybean oil sulfate salts, rapeseed oil sulfate salts, palm oil sulfate salts, and beef tallow sulfate salts, (8) fatty acid salts such as laurate salts, oleate salts, stearates, and 2-ethylhexanoate salts, (9) sulfosuccinate salts of fatty alcohols such as di(2-ethylhexyl)sulfosuccinate salts, and (10) N-acyl sarcosine salts such as oleoyl sarcosine salts.

Examples of the salt constituting the anionic surfactant (C) include metal salts, ammonium salts, phosphonium salts, and organic amine salts.
Examples of the metal salt include alkali metal salts and alkaline earth metal salts. Specific examples of the alkali metal constituting the alkali metal salt include sodium, potassium, lithium, etc. Examples of the alkaline earth metal constituting the alkaline earth metal salt include metals belonging to Group 2 elements, such as calcium, magnesium, beryllium, strontium, barium, etc.

Specific examples of phosphoniums constituting phosphonium salts include quaternary phosphoniums such as tetramethylphosphonium, tetraethylphosphonium, tetrabutylphosphonium, tetraoctylphosphonium, dibutyldihexylphosphonium, trihexyltetradecylphosphonium, triethyloctylphosphonium, trioctylmethylphosphonium, and triphenylmethylphosphonium.

The amine constituting the organic amine salt may be a primary amine, a secondary amine, or a tertiary amine. Specific examples of amines 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, and dimethyllaurylamine; (2) aromatic amines or heterocyclic amines such as aniline, N-methylbenzylamine, pyridine, morpholine, piperazine, and derivatives thereof; (3) alkanolamines such as monoethanolamine, N-methylethanolamine, diethanolamine, triethanolamine, isopropanolamine, diisopropanolamine, triisopropanolamine, dibutylethanolamine, butyldiethanolamine, octyldiethanolamine, and lauryldiethanolamine; (4) arylamines such as N-methylbenzylamine; and (5) polyoxyalkylene alkylamino ethers such as polyoxyethylene lauryl amino ether and polyoxyethylene steryl amino ether.

These anionic surfactants (C) may be used alone or in appropriate combination of two or more kinds.
In the treatment agent, the lower limit of the content of the anionic surfactant (C) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content of the anionic surfactant (C) is 0.1% by mass or more, the emulsion stability of the diluted solution in which the treatment agent is diluted with a solvent can be further improved. The upper limit of the content of the anionic surfactant (C) is preferably 30% by mass or less, more preferably 25% by mass or less. When the content of the anionic surfactant (C) is 30% by mass or less, the deterioration of water dropout and foaming in the spunlace process using the fiber to which the treatment agent is applied can be further reduced. In addition, a range in which the above upper and lower limits are arbitrarily combined is also assumed.

If the total content of the ether monoester derivative (A), ether diester derivative (B), and anionic surfactant (C) in the treatment agent is 100 parts by mass, it is preferable that the ether monoester derivative (A) is contained in an amount of 10 parts by mass to 85 parts by mass, the ether diester derivative (B) is contained in an amount of 10 parts by mass to 85 parts by mass, and the anionic surfactant (C) is contained in an amount of 0.1 parts by mass to 20 parts by mass. By specifying the ranges as described above, it is possible to further reduce the deterioration of water-shedding bubbles in the spunlace process using fibers to which the treatment agent has been applied. Note that ranges that combine the above upper and lower limits in any way are also envisioned.

(Fatty acids (D))
The treatment agent of the present embodiment may further contain a fatty acid (D). By containing the fatty acid (D) in the treatment agent, it is possible to reduce deterioration of water falling off and foaming in the spunlace process using the fiber to which the treatment agent is applied.

The fatty acids (D) used in the treatment agent of this embodiment are at least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
Specific examples of the fatty acid are the same as those explained as the raw material of the ether monoester derivative (A).

The fats and oils include at least one selected from vegetable oils, animal oils, and hardened oils thereof. Specific examples of vegetable oils include 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, grape seed oil, avocado oil, palm oil, tall oil, etc. Specific examples of animal oils include egg yolk oil, beef tallow, lard, fish oil, etc.

These fatty acids (D) may be used alone or in appropriate combination of two or more.
In the treatment agent, the lower limit of the content of fatty acids (D) is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content of fatty acids (D) is 0.1% by mass or more, the deterioration of water dropout and foaming in the spunlace process using the fiber to which the treatment agent is applied can be further reduced. The upper limit of the content of such fatty acids (D) is preferably 15% by mass or less, more preferably 10% by mass or less. When the content of fatty acids (D) is 15% by mass or less, the emulsion stability of the diluted solution in which the treatment agent is diluted with a solvent can be further improved. Note that a range in which the above upper and lower limits are arbitrarily combined is also envisioned.

If the total content of the ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), and fatty acid (D) in the treatment agent is 100 parts by mass, it is preferable 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 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 (D). By being specified in such a range, it is possible to further reduce the deterioration of water-dropping bubbles in the spunlace process using fibers to which the treatment agent is applied. In addition, it is possible to further improve the emulsion stability of the diluted solution in which the treatment agent is diluted with a solvent. Note that ranges that combine the above upper and lower limits in any way are also envisioned.

(Polyhydric alcohol (E))
The treatment agent of the present embodiment may further contain a polyhydric alcohol (E). When the treatment agent contains the polyhydric alcohol (E), the carding properties when the fibers to which the treatment agent is applied are passed through a card can be improved.

Specific examples of polyhydric alcohols include 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, and sorbitol.

These polyhydric alcohols (E) may be used alone or in appropriate combination of two or more kinds.
In the treatment agent, the lower limit of the content of the polyhydric alcohol (E) is preferably 0.1% by mass or more, more preferably 0.2% by mass or more. The upper limit of the content of the polyhydric alcohol (E) is preferably 70% by mass or less, more preferably 65% by mass or less. By specifying the content of the polyhydric alcohol (E) within this range, the carding property when the fiber to which the treatment agent is applied is passed through a card can be improved. Note that a range in which the above upper and lower limits are arbitrarily combined is also envisioned.

In the treatment agent, when the total content of the ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), fatty acid (D), and polyhydric alcohol (E) is 100 parts by mass, it is preferable 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 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 acid (D), and 0.1 parts by mass or more and 70 parts by mass or less of the polyhydric alcohol (E). By being specified in such a range, it is possible to further reduce the deterioration of water falling off and foaming in the spunlace process using the fiber to which the treatment agent is applied. Note that a range in which the above upper and lower limits are arbitrarily combined is also envisioned.

(Lubricant (F))
The treatment agent of the present embodiment may further contain a lubricant (F). By containing the lubricant (F) in the treatment agent, the carding properties when the fibers to which the treatment agent is applied are passed through a card can be improved.

The lubricant (F) used in the treatment agent of this embodiment is at least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.
Specific examples of the hydrocarbon compound include aromatic hydrocarbons, paraffinic hydrocarbons, naphthenic hydrocarbons, etc. More specific examples include mineral oil, spindle oil, liquid paraffin, etc. Commercially available products can be appropriately used as these hydrocarbon compounds.

The ester is not particularly limited, but examples thereof include ester oils produced from fatty acids and alcohols. Ester oils are produced, for example, from fatty acids having odd or even numbered hydrocarbon groups and alcohols.

The fatty acid used as the raw material for the ester oil is not particularly limited in terms of the number of carbon atoms, whether or not it is branched, its valence, etc., and may be, for example, a higher fatty acid, a fatty acid having a cyclo ring, or a fatty acid having an aromatic ring. The alcohol used as the raw material for the ester oil is not particularly limited in terms of the number of carbon atoms, whether or not it is branched, its valence, etc., and may be, for example, a higher alcohol, an alcohol having a cyclo ring, or an alcohol having an aromatic ring.

Specific examples of ester oils include, for example, (1) ester compounds of aliphatic monoalcohols and aliphatic monocarboxylic acids, such as stearyl stearate, octyl palmitate, oleyl laurate, oleyl oleate, isotridecyl stearate, and isotetracosyl oleate; (2) complete ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids, such as 1,6-hexanediol didecanate, glycerin trioleate, trimethylolpropane trilaurate, and pentaerythritol tetraoctate; (3) partial ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids, such as sorbitan monostearate; and (4) dioleate. (4) ester compounds of aromatic monoalcohols and aliphatic monocarboxylic acids, such as bisphenol A dilaurate, dioleyl thiodipropionate, diisocetyl thiodipropionate, and diisostearyl thiodipropionate; (5) ester compounds of aromatic monoalcohols and aliphatic monocarboxylic acids, such as benzyl oleate and benzyl laurate; (6) ester compounds of aromatic polyhydric alcohols and aliphatic monocarboxylic acids, such as bisphenol A dilaurate; and (7) ester compounds of aliphatic monoalcohols and aromatic polycarboxylic acids, such as bis 2-ethylhexyl phthalate, diisostearyl isophthalate, and trioctyl trimellitate.

Specific examples of silicones include dimethyl silicone, phenyl-modified silicone, amino-modified silicone, amide-modified silicone, polyether-modified silicone, aminopolyether-modified silicone, alkyl-modified silicone, alkylaralkyl-modified silicone, alkylpolyether-modified silicone, ester-modified silicone, epoxy-modified silicone, carbinol-modified silicone, mercapto-modified silicone, polyoxyalkylene-modified silicone, etc.

The lower limit of the content of lubricant (F) in the treatment agent is preferably 0.5 mass% or more, more preferably 1 mass% or more. The upper limit of the content of lubricant (F) is preferably 25 mass% or less, more preferably 20 mass% or less. By specifying the content of lubricant (F) within this range, the cardability when the fiber to which the treatment agent is applied is passed through a card can be improved. Note that ranges that combine the above upper and lower limits in any way are also envisioned.

In the treatment agent, when the total content of the ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), fatty acid (D), polyhydric alcohol (E), and lubricant (F) is 100 parts by mass, it is preferable 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 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 acid (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 being specified in such a range, it is possible to further reduce the deterioration of water falling off and foaming in the spunlace process using the fiber to which the treatment agent is applied. Note that a range in which the above upper and lower limits are arbitrarily combined is also assumed.

(Storage format)
The treatment agent may be configured as a one-component type containing the above-mentioned components (A) to (E), or from the viewpoint of improving the formulation stability, it may be configured as a two-component type treatment agent as shown below.

The two-component treatment agent is configured as a set including a first treatment agent for rayon spunlace (hereinafter referred to as the "first treatment agent") containing an ether monoester derivative (A) and an ether diester derivative (B), and a second treatment agent for rayon spunlace (hereinafter referred to as the "second treatment agent") containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E). The first treatment agent may further optionally contain fatty acids (D) and/or a lubricant (F).

　A two-component treatment agent is composed of a first treatment agent and a second treatment agent that is composed as a separate agent from the first treatment agent before use, for example during storage or distribution. A two-component treatment agent is prepared as a mixture of the first treatment agent and the second treatment agent when used.

(solvent)
The treatment agent of this embodiment is mixed with a solvent (S) as necessary to prepare a treatment-agent-containing composition for rayon spunlace (hereinafter referred to as the "treatment-agent-containing composition"), and the treatment agent may be stored or distributed in the form of the treatment-agent-containing composition.

The solvent (S) has a boiling point of 105°C or less at atmospheric pressure. In this specification, atmospheric pressure refers to standard atmospheric pressure (101,325 Pa = 1 atm). Examples of the solvent include water and organic solvents. Specific examples of organic solvents include lower alcohols such as ethanol and propanol, and low-polarity solvents such as hexane. These solvents may be used alone or in appropriate combination of two or more. Among these, polar solvents such as water and lower alcohols are preferred from the viewpoint of excellent dispersibility or solubility of each component, and water is more preferred from the viewpoint of excellent emulsion stability and handling.

In the treatment-containing composition, if the total content of the treatment agent and the solvent (S) is 100 parts by mass, it is preferable that the treatment agent is contained in an amount of 10 parts by mass or more and 99.99 parts by mass or less, and the solvent (S) is contained in an amount of 0.01 parts by mass or more and 90 parts by mass or less.

(Rayon)
The rayon to which the treatment agent of the present embodiment is applied may be a long fiber generally called a filament, or a short fiber generally called a staple. Short fibers are preferred. The length of the short fibers in the present embodiment is not particularly limited as long as it corresponds to short fibers in the technical field, but for example, it is preferably 100 mm or less, and more preferably 51 mm or less.

The effects of the treatment agent according to the first embodiment will be described.
(1-1) The treatment agent of the first embodiment is configured to contain a nonionic surfactant (X) containing the above-mentioned ether monoester derivative (A) and ether diester derivative (B). Therefore, even if the drying temperature is high in the fiber drying process performed before the carding process, it is possible to reduce the deterioration of water dropout and foaming in the spunlace process using fibers to which the treatment agent for rayon spunlace is applied. In addition, it is possible to improve the emulsion stability of the dilution of the treatment agent. In addition, it is possible to improve the carding properties when the fibers to which the treatment agent is applied are passed through a card.

(1-2) The treatment agent of the first embodiment may be configured as a set including a first treatment agent containing an ether monoester derivative (A) and an ether diester derivative (B), and a second treatment agent containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E). This configuration can improve the formulation stability, particularly the storage stability, of the treatment agent.

Second Embodiment
Next, a second embodiment of the first treatment agent of the present invention will be described, focusing on the differences from the above embodiment.

The first treatment agent of this embodiment contains an ether monoester derivative (A) and an ether diester derivative (B). The first treatment agent may optionally further contain fatty acids (D) and/or a lubricant (F). When used, the first treatment agent is used in combination with a second treatment agent containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E), or a second treatment agent-containing composition for rayon spunlace containing the second treatment agent and a solvent (S) (hereinafter referred to as the "second treatment agent-containing composition").

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

(solvent)
The first treatment agent of this embodiment is mixed with a solvent (S) as necessary to prepare a first treatment agent-containing composition for rayon spunlace (hereinafter referred to as the "first treatment agent-containing composition"), and the first treatment agent-containing composition may be stored or distributed in the form of the first treatment agent-containing composition.

The solvent (S) may be any of those exemplified in the first embodiment. In the first treatment agent-containing composition, it is preferable that the first treatment agent is contained in an amount of 0.01 part by mass or more, assuming that the total content of the first treatment agent and the solvent is 100 parts by mass.

The following describes the effects of the first treatment agent according to the second embodiment. In addition to the effects of the above-described embodiment, the second embodiment has the following effects.
(2-1) The first treatment agent of the second embodiment contains an ether monoester derivative (A) and an ether diester derivative (B), and is used in combination with a second treatment agent containing an anionic surfactant (C) or a polyhydric alcohol (E). This improves the formulation stability, particularly the storage stability, of the first treatment agent and the second treatment agent. In addition, the components of the resulting treatment agent can be adjusted by adjusting the mixing ratio with the second treatment agent. In addition, the first treatment agent alone can be distributed as a separate agent from the second treatment agent.

Third Embodiment
Next, a third embodiment of the method for producing a spunlace nonwoven fabric of the present invention (hereinafter referred to as the "method for producing a nonwoven fabric") will be described.

The method for producing the nonwoven fabric of this embodiment involves a step of adhering a treatment agent to rayon (step 1), a step of subjecting the rayon obtained in step 1 to a carding process to produce a web (step 2), and a step of entangling the web obtained in step 2 with a water flow to produce a spunlace nonwoven fabric (step 3).

In step 1, when the treatment agent is a one-component treatment agent, a diluted solution containing a solvent and the treatment agent of the first embodiment is prepared. The diluted solution can be prepared, for example, by adding the treatment agent or treatment agent-containing composition of the first embodiment to a solvent. The diluted solution is preferably prepared by adding the treatment agent or treatment agent-containing composition of the first embodiment to water.

When the treatment agent is a two-component treatment agent, a diluted solution of the treatment agent is prepared containing a solvent, the first treatment agent of the second embodiment, and the second treatment agent. The diluted solution can be prepared, for example, by adding the first treatment agent or the composition containing the first treatment agent, and the second treatment agent or the composition containing the second treatment agent to a solvent. The diluted solution is preferably prepared by adding the first treatment agent or the composition containing the first treatment agent, and the second treatment agent or the composition containing the second treatment agent to water. The ratio of the content of the first treatment agent to the second treatment agent is preferably 95/5 to 5/95 as the mass ratio of the non-volatile content. By being specified in this range, operability can be improved. In this specification, the non-volatile content refers to the residue after the target object is heat-treated at 105°C for 2 hours to thoroughly remove the volatile substances, that is, the bone-dry matter.

The solvents used to prepare the diluted solution include those exemplified in the first embodiment. From the viewpoint of ease of use, etc., it is preferable that the diluted solution has a treatment agent concentration of 0.1% by mass or more and 10% by mass or less.

When the first and second treatment agents are used together, the mixing ratio of each agent can be changed as desired. This makes it easy to fine-tune the mixing ratio and prepare a treatment agent or dilution solution that always provides optimal fiber characteristics or fiber manufacturing characteristics, even under different manufacturing conditions, such as different manufacturing equipment or different climates (temperature, humidity, etc.).

The treatment agent can be applied by any known method, such as immersion, spraying, showering, roller, or dripping. The application process is not particularly limited, but may be a process subsequent to the refining process. The amount of treatment agent applied is preferably such that the solid content, not including the solvent, is 0.1 to 1% by mass relative to the rayon. The fibers to which the treatment agent has been applied are then dried under appropriate conditions.

In step 2, the rayon to which the treatment agent is applied is carded to produce a web. Carding can be performed using a known carding machine. Examples include flat cards, combination cards, and roller cards.

The process for obtaining the spunlace nonwoven fabric in step 3 is a process for entangling the web obtained in the web manufacturing process with a water flow. The web is irradiated with a high-pressure water flow, and the fibers are entangled by the pressure of the water flow to form a sheet. After the water flow entangling process, a drying process and a winding process may be carried out as appropriate.

The effects of the method for producing a nonwoven fabric according to the third embodiment will be described below. In addition to the effects of the above-mentioned embodiments, the third embodiment has the following effects.
(3-1) In the method for producing a nonwoven fabric according to the third embodiment, the deterioration of bubbles falling off the water used in hydroentanglement can be reduced, so that hydroentanglement can be performed by circulating the water used in hydroentanglement. Therefore, hydroentanglement can be performed favorably, and the texture of the spunlace nonwoven fabric can be improved.

(3-2) In addition, when drying the fibers to which the treatment agent has been applied under appropriate conditions, high temperature conditions, for example, 100°C or higher, can be used. With this configuration, the drying process can be completed in a short time, improving the manufacturing efficiency of spunlace nonwoven fabric.

The above embodiment may be modified as follows: The above embodiment and the following modifications may be combined with each other to the extent that no technical contradiction occurs.
The method for preparing the diluted solution of the treatment agent in the above embodiment is not particularly limited, and a preparation method other than that described in the explanation of the third embodiment may be adopted.

- Each treatment agent, composition, or dilution solution of the above embodiments may further contain other components used in normal treatment agents, such as other solvents, stabilizers, antistatic agents, binders, antioxidants, UV absorbers, organic acids, and surfactants other than those mentioned above, as other components to maintain the quality of each treatment agent, composition, or dilution solution, within the range that does not impair the effects of the present invention. Note that, from the viewpoint of efficiently exerting the efficacy of the present invention, the other components used in normal treatment agents, other than solvents, are preferably 50% by mass or less in each treatment agent.

Below, examples are given to more specifically explain the configuration and effects of the present invention, but the present invention is not limited to these examples. In the following explanations of the examples and comparative examples, parts means parts by mass, and % means % by mass, unless otherwise specified.

Test section 1 (preparation of one-agent type treatment agent)
Example 1
As shown in Table 1, the treatment agent of Example 1 was prepared containing 23 parts (%) of a compound (A-1) obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid as the ether monoester derivative (A) which is a nonionic surfactant (X), 27 parts (%) of 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 as the ether diester derivative (B), 10 parts (%) of potassium lauryl phosphate ester (C-1) as the anionic surfactant (C), 2 parts (%) of beef tallow (D-1) as the fatty acid (D), 36 parts (%) of ethylene glycol (E-1) as the polyhydric alcohol (E), and 2 parts (%) of stearyl stearate (F-1) as the lubricant (F).

(Examples 2 to 32, Comparative Examples 1 to 11)
The treatment agents of Examples 2 to 32 and Comparative Examples 1 to 11 were prepared in the same manner as the treatment agent of Example 1 so as to contain the nonionic surfactant (X), the anionic surfactant (C), the fatty acid (D), the polyhydric alcohol (E), and the lubricant (F) in the proportions shown in Table 1.

The type and content of nonionic surfactant (X), the type and content of anionic surfactant (C), the type and content of fatty acids (D), the type and content of polyhydric alcohol (E), and the type and content of lubricant (F) are shown in the "Nonionic surfactant (X)" column, the "Anionic surfactant (C)" column, the "Fatty acids (D)" column, the "Polyhydric alcohol (E)" column, and the "Lubricant (F)" column in Table 1. The content of other nonionic surfactants (G) indicates the blended amount (parts) when the total content of ether monoester derivative (A), ether diester derivative (B), anionic surfactant (C), fatty acids (D), polyhydric alcohol (E), and lubricant (F) in the treatment agent is taken as 100 parts.

Details of the nonionic surfactant (X), anionic surfactant (C), fatty acid (D), polyhydric alcohol (E), and lubricant (F) shown in Table 1 are as follows.
<Nonionic surfactant (X)>
(Ether monoester derivative (A))
A-1: Compound in which 10 moles of ethylene oxide are added to 1 mole of stearic acid. A-2: Compound in which 5 moles of ethylene oxide are added to 1 mole of stearic acid. A-3: Compound in which 20 moles of ethylene oxide are added to 1 mole of oleic acid. A-4: Compound in which 13 moles of ethylene oxide are added to 1 mole of oleic acid. A-5: Compound in which 10 moles of ethylene oxide are added to 1 mole of oleic acid. A-6: Compound in which 5 moles of ethylene oxide are added to 1 mole of oleic acid. A-7: Compound in which 10 moles of ethylene oxide are added to 1 mole of palmitic acid. A-8: Compound in which 10 moles of ethylene oxide are added to 1 mole of lauric acid. A-9: Compound in which 10 moles of ethylene oxide are added to 1 mole of coconut fatty acid. A-10: Compound in which 20 moles of propylene oxide are added to 1 mole of oleic acid. A-11: Compound in which 10 moles of propylene oxide are added to 1 mole of oleic acid. A-12: A compound obtained by adding 5 moles of propylene oxide to 1 mole of stearic acid. A-13: A compound obtained by randomly adding 5 moles of ethylene oxide and 10 moles of propylene oxide to 1 mole of stearic acid. A-14: A compound obtained by randomly adding 10 moles of ethylene oxide and 5 moles of propylene oxide to 1 mole of stearic acid. A-15: A compound obtained by adding 5 moles of ethylene oxide to 1 mole of stearic acid, followed by adding 10 moles of propylene oxide. A-16: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid, followed by adding 5 moles of propylene oxide. rA-17: A compound obtained by adding 40 moles of ethylene oxide to 1 mole of stearic acid. rA-18: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of cerotic acid. Note that rA-17 and rA-18 are compounds similar to the ether monoester derivative (A).

(Ether diester derivative (B))
B-1: A compound obtained by adding 14 moles of ethylene oxide to 1 mole of oleic acid, followed by the addition of 1 mole of oleic acid. B-2: A compound obtained by adding 23 moles of ethylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-3: A compound obtained by adding 9 moles of ethylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-4: A compound obtained by adding 5 moles of ethylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-5: A compound obtained by adding 9 moles of ethylene oxide to 1 mole of lauric acid, followed by the addition of 1 mole of lauric acid. B-6: A compound obtained by adding 9 moles of propylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-7: A compound obtained by adding 5 moles of propylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-8: A compound obtained by randomly adding 5 moles of ethylene oxide and 10 moles of propylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-9: A compound obtained by randomly adding 10 moles of ethylene oxide and 5 moles of propylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. B-10: A compound obtained by adding 5 moles of ethylene oxide to 1 mole of stearic acid, followed by the addition of 10 moles of propylene oxide, followed by the addition of 1 mole of stearic acid. B-11: A compound obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid, followed by the addition of 5 moles of propylene oxide, followed by the addition of 1 mole of stearic acid. rB-12: A compound obtained by adding 9 moles of ethylene oxide to 1 mole of cerotic acid, followed by the addition of 1 mole of cerotic acid. rB-13: A compound obtained by adding 40 moles of ethylene oxide to 1 mole of stearic acid, followed by the addition of 1 mole of stearic acid. Incidentally, rB-12 and rB-13 are compounds similar to the ether diester derivative (B).

(Other nonionic surfactants (G))
G-1: Polyoxyethylene (n=5: indicates the number of moles of ethylene oxide added (hereinafter the same)) 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 beef tallow sulfate C-4: Sodium oleate C-5: Potassium oleate C-6: Potassium stearate C-7: Potassium laurate C-8: Potassium octylate C-9: Sodium lauryl sulfonate C-10: Sodium tetradecane sulfonate <Fatty acids (D)>
D-1: Beef 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: Hardened castor oil D-10: Palm oil D-11: Hardened palm oil D-12: Tall oil D-13: Coconut oil <Polyhydric alcohol (E)>
E-1: Ethylene glycol E-2: Diethylene glycol E-3: Propylene glycol E-4: Glycerin E-5: Polyethylene glycol (mass average molecular weight 200)
E-6: Polyethylene glycol (mass average molecular weight 400)
E-7: Polyethylene glycol (mass average molecular weight 600)
E-8: Polyethylene glycol (mass average molecular weight 2000)
E-9: Polypropylene glycol (mass average molecular weight 400)
<Lubricant (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 mm2/s)
F-4: Dimethyl silicone (Kinematic viscosity (25°C): ¹⁰ mm2/s)
F-5: Sorbitan monostearate The mass average molecular weight was determined by gel permeation chromatography.

Test Section 2 (Adhesion of treatment agent to rayon fiber)
Each treatment agent prepared in Test Section 1 was diluted with ion-exchanged water to prepare a 0.15% diluted solution of the treatment agent. This diluted solution of the treatment agent was applied by spray oiling to a rayon fiber having a fineness of 1.3×10 ^-4 g/m and a fiber length of 38 mm so that the amount of adhesion was 0.15%. The fiber was then dried in a hot air dryer at 80° C. for 2 hours or in a hot air dryer at 120° C. for 1 hour, and then conditioned overnight in an atmosphere of 25° C. and 40% RH to obtain a rayon fiber to which the treatment agent was applied.

Test category 3 (Foam shedding test)
15 g of rayon fiber to which the treatment agent was applied in test section 2 was immersed in 150 g of ion-exchanged water for 2 hours. The immersed fiber was then removed, and the treated cotton was squeezed using a hand juicer. 10 mL of the squeezed liquid was placed in a 25 mL graduated cylinder with a stopper, and the cylinder was vigorously shaken 30 times (amplitude 30 cm) for 10 seconds. After leaving the cylinder to stand for 5 minutes, the height from the water surface to the top surface of the foam was measured, and the foam-removal property was evaluated according to the following criteria. The results are shown in the "Foam-removal property test" column in Table 2.

Evaluation criteria for the foam shedding test ◎◎ (Excellent): The height from the water surface to the top of the foam is less than 1 mm ◎ (Good): The height from the water surface to the top of the foam is 1 mm or more and less than 1.5 mm ○ (Fair): The height from the water surface to the top of the foam is 1.5 mm or more and less than 4 mm × (Poor): The height from the water surface to the top of the foam is 4 mm or more Test category 4 (emulsion stability)
95 parts by mass of ion-exchanged water was added to 5 parts by mass of each treatment agent prepared in Test Section 1, and the mixture was stirred at 50°C to prepare a diluted solution of the treatment agent containing 5 parts by mass of the treatment agent. 100 mL of the prepared diluted solution of the treatment agent was placed in a 100 mL carrot-shaped settling bottle. The bottle was left to stand in an environment of 20°C, and the amount of precipitation after 24 hours was confirmed, and the emulsion stability was evaluated according to the following criteria. The results are shown in the "Emulsion stability" column of Table 2.

Evaluation criteria for emulsion stability ◎◎ (Excellent): Sediment amount is less than 0.1 mL ◎ (Good): Sediment amount is 0.1 mL or more and less than 0.5 mL ○ (Fair): Sediment amount is 0.5 mL or more and less than 1 mL × (Poor): Sediment amount is 1 mL or more Test category 5 (Curd property)
20 g of rayon fiber having each treatment agent applied thereto, prepared in Test Section 1, was conditioned for 24 hours in a thermostatic chamber at 20°C and 65% RH, and then subjected to a miniature carding machine. The ratio of the discharged amount to the input amount was calculated as the carding rate (%) using the following formula (1), and the carding properties were evaluated according to the following evaluation criteria. The results are shown in the "Carding properties" column in Table 2.

Evaluation criteria for carding properties: ◎◎ (Excellent): Carding spinning rate is 90% or more ◎ (Good): Carding spinning rate is 85% or more and less than 90% ○ (Fair): Carding spinning rate is 80% or more and less than 85% × (Poor): Carding spinning rate is less than 80% Test category 6 (Preparation of a composition containing a first treatment agent of a two-agent type treatment agent)
(First treatment agent-containing composition (I-1))
As shown in Table 3, a first treatment agent-containing composition (I-1) was prepared, which contains 20 parts (%) of a compound (A-1) obtained by adding 10 moles of ethylene oxide to 1 mole of stearic acid as an ether monoester derivative (A) which is a nonionic surfactant (X), 23 parts (%) of 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 as an ether diester derivative (B), 2 parts (%) of beef tallow (D-1) as fatty acids (D), 2 parts (%) of stearyl stearate (F-1) as lubricant (F), and 53 parts (%) of water as a solvent (S).

(First treatment agent-containing compositions (I-2) to (I-28))
In the same manner as in the first treatment agent-containing composition (I-1), a nonionic surfactant (X), a fatty acid (D), a lubricant (F), and a solvent (S) were prepared in the proportions shown in Table 3.

The type and content of nonionic surfactant (X), type and content of fatty acids (D), type and content of lubricant (F), and type and content of solvent (S) are shown in the "Nonionic surfactant (X)" column, the "Fatty acids (D)" column, the "Lubricant (F)" column, and the "Solvent (S)" column in Table 3, respectively.

Test Section 7 (Preparation of a composition containing the second treatment agent of a two-agent type treatment agent)
(Second treatment agent-containing composition (II-1))
As shown in Table 4, a second treatment agent-containing composition (II-1) was prepared, which contained 9 parts (%) of potassium lauryl phosphate (C-1) as the anionic surfactant (C), 31 parts (%) of ethylene glycol (E-1) as the polyhydric alcohol (E), and 60 parts (%) of water as the solvent (S).

(Second treatment agent-containing compositions (II-2) to (II-28))
In the same manner as in the second treatment agent-containing composition (II-1), a composition containing the anionic surfactant (C), the polyhydric alcohol (E), and the solvent (S) in the proportions shown in Table 4 was prepared.

The type and content of the anionic surfactant (C), the type and content of the polyhydric alcohol (E), and the type and content of the solvent (S) are shown in the "Anionic surfactant (C)" column, the "Polyhydric alcohol (E)" column, and the "Solvent (S)" column in Table 4, respectively.

Test Section 8 (Evaluation of formulation stability)
The first treatment agent-containing composition and the second treatment agent-containing composition were allowed to stand in an environment of 50° C., and the appearance after 24 hours was checked. The formulation stability was evaluated according to the following criteria. The results are shown in the “Formulation stability” column of Tables 3 and 4.

Evaluation criteria for formulation stability (first treatment agent-containing composition and second treatment agent-containing composition)
◎ (Acceptable): No separation × (Not acceptable): Separation occurred Test category 9 (Preparation of treatment agent-containing composition from first treatment agent-containing composition and second treatment agent-containing composition)
(Example 33)
As shown in Table 5, the treatment agent-containing composition of Example 33 was prepared by mixing 50% (parts) of the first treatment agent-containing composition (I-1) and 50% (parts) of the second treatment agent-containing composition (II-1).

(Examples 34 to 60)
In the same manner as in Example 33, the first treatment agent-containing composition and the second treatment agent-containing composition shown in Table 5 were mixed to prepare the treatment agent-containing composition of each example.

The types and mass ratios of the first treatment agent-containing composition and the types and mass ratios of the second treatment agent-containing composition are shown in the "First treatment agent-containing composition" and "Second treatment agent-containing composition" columns of Table 5, respectively.

Test Section 10 (Evaluation of two-component treatment composition)
The obtained treatment-containing compositions of each example were used to evaluate the foam-removal test, emulsion stability, and curd properties in the same manner as in Example 1. The results are shown in the "Foam-removal test", "Emulsion stability", and "Curd properties" columns of Table 5, respectively.

As is clear from the evaluation results of each Example against the Comparative Examples in each table, the treatment agent of the present invention can reduce the deterioration of water-shedding bubbles in the spunlace process using fibers to which the treatment agent has been applied. It can also improve the emulsion stability of the diluted solution of the treatment agent. It can also improve the carding properties when fibers to which the treatment agent has been applied are passed through a card.

The present disclosure also encompasses the following aspects.
(Appendix 1)
A treatment agent for rayon spunlace, comprising a nonionic surfactant (X) containing the following ether monoester derivative (A) and the following ether diester derivative (B):

Ether monoester derivative (A): A compound in which a total of 1 to 30 moles of alkylene oxide having 2 to 3 carbon atoms are added to 1 mole of fatty acid having 12 to 24 carbon atoms.

Ether diester derivative (B): A compound obtained by esterifying a compound in which a total of 1 to 30 moles of alkylene oxide having 2 to 3 carbon atoms are added per mole of fatty acid having 12 to 24 carbon atoms with 1 mole of fatty acid having 12 to 24 carbon atoms.

(Appendix 2)
The treatment agent for rayon spunlace according to Appendix 1, containing the ether monoester derivative (A) in an amount of 10 parts by mass or more and 90 parts by mass or less, and the ether diester derivative (B) in an amount of 10 parts by mass or more and 90 parts by mass or less, where the total content of the ether monoester derivative (A) and the ether diester derivative (B) is 100 parts by mass.

(Appendix 3)
The treatment agent for rayon spunlace according to claim 1, further comprising an anionic surfactant (C).

(Appendix 4)
The treatment agent for rayon spunlace further contains an anionic surfactant (C),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), and the anionic surfactant (C) is 100 parts by mass,
The treatment agent for rayon spunlace according to Appendix 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, and the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less.

(Appendix 5)
The treatment agent for rayon spunlace according to Appendix 1, further comprising the following fatty acid (D).

Fatty acids (D): At least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
(Appendix 6)
The rayon spunlace treating agent further contains an anionic surfactant (C) and the following fatty acid (D),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), and the fatty acids (D) is 100 parts by mass,
The treatment agent for rayon spunlace according to Appendix 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less, and the fatty acid (D) in an amount of 0.1 parts by mass or more and 10 parts by mass or less.

Fatty acids (D): At least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
(Appendix 7)
The treatment agent for rayon spunlace according to claim 1, further comprising a polyhydric alcohol (E).

(Appendix 8)
The rayon spunlace treating agent further contains an anionic surfactant (C), the following fatty acid (D), and a polyhydric alcohol (E),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acid (D), and the polyhydric alcohol (E) is 100 parts by mass,
The treatment agent for rayon spunlace according to Appendix 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less, the fatty acid (D) in an amount of 0.1 parts by mass or more and 10 parts by mass or less, and the polyhydric alcohol (E) in an amount of 0.1 parts by mass or more and 70 parts by mass or less.

Fatty acids (D): At least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
(Appendix 9)
The treatment agent for rayon spunlace according to appendix 1, further comprising the following lubricant (F).

Lubricant (F): At least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.
(Appendix 10)
The rayon spunlace treating agent further contains an anionic surfactant (C), the following fatty acid (D), a polyhydric alcohol (E), and the following lubricant (F),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acid (D), the polyhydric alcohol (E), and the lubricant (F) is 100 parts by mass,
The treatment agent for rayon spunlace according to Appendix 1, comprising 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 acid (D), 0.1 parts by mass or more and 10 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).

Fatty acids (D): At least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
Lubricant (F): At least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.

(Appendix 11)
a first treatment agent for rayon spunlace, comprising the ether monoester derivative (A) and the ether diester derivative (B), and further optionally comprising the following fatty acid (D) and the following lubricant (F);
The treatment agent for rayon spunlace described in Appendix 1 is constituted as a set with a second treatment agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E).

(Appendix 12)
The present invention comprises a treating agent for rayon spunlace according to any one of claims 1 to 11 and a solvent (S) as follows:
A composition containing a treatment agent for rayon spunlace, characterized in that the treatment agent for rayon spunlace is contained in an amount of 10 parts by mass or more and 99.99 parts by mass or less, and the solvent (S) is contained in an amount of 0.01 parts by mass or more and 90 parts by mass or less, when the total content of the treatment agent for rayon spunlace and the solvent (S) is 100 parts by mass.

Solvent (S): A solvent having a boiling point of 105° C. or lower at atmospheric pressure.
(Appendix 13)
The composition containing a treatment agent for rayon spunlace according to claim 12, wherein the solvent (S) is water.

(Appendix 14)
A second treatment agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E), or a second treatment agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E), and a composition containing a second treatment agent for rayon spunlace containing the following solvent (S),
A first treatment agent for rayon spunlace, comprising the following ether monoester derivative (A) and the following ether diester derivative (B), and optionally further comprising the following fatty acid (D), and optionally comprising the following lubricant (F).

Solvent (S): A solvent having a boiling point of 105° C. or lower at atmospheric pressure.
(Appendix 15)
A composition containing a first treatment agent for rayon spunlace, comprising the first treatment agent for rayon spunlace described in Appendix 14 and the following solvent (S).

Solvent (S): A solvent having a boiling point of 105° C. or lower at atmospheric pressure.
(Appendix 16)
A method for producing a spunlace nonwoven fabric, comprising the steps of:

Step 1: A step of adhering a treatment agent for rayon spunlace described in any one of Appendices 1 to 11 to rayon.
Step 2: A step of subjecting the rayon obtained in step 1 to a carding step to produce a web.

Step 3: The web obtained in step 2 is entangled with a water flow to obtain a spunlace nonwoven fabric.

Claims

A treatment agent for rayon spunlace, comprising a nonionic surfactant (X) containing the following ether monoester derivative (A) and the following ether diester derivative (B), and a fatty acid (D) described below.
Ether monoester derivative (A): A compound in which a total of 1 mole or more and 30 moles or less of alkylene oxide having 2 or more and 3 or less carbon atoms is added per mole of fatty acid having 12 or more and 24 or less carbon atoms.
Ether diester derivative (B): A compound obtained by esterifying a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per 1 mol of fatty acid having 12 to 24 carbon atoms and 1 mol of fatty acid having 12 to 24 carbon atoms (excluding polyethylene glycol dilaurate).
Fatty acids (D): At least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
A treatment agent for rayon spunlace, comprising a nonionic surfactant (X) containing the following ether monoester derivative (A) and the following ether diester derivative (B), and a polyhydric alcohol (E) (excluding esters).
Ether monoester derivative (A): A compound in which a total of 1 mole or more and 30 moles or less of alkylene oxide having 2 or more and 3 or less carbon atoms is added per mole of fatty acid having 12 or more and 24 or less carbon atoms.
Ether diester derivative (B): A compound obtained by esterifying a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per 1 mol of fatty acid having 12 to 24 carbon atoms and 1 mol of fatty acid having 12 to 24 carbon atoms (excluding polyethylene glycol dilaurate).
The treatment agent for rayon spunlace according to claim 1, which contains the ether monoester derivative (A) in an amount of 10 parts by mass or more and 90 parts by mass or less, and the ether diester derivative (B) in an amount of 10 parts by mass or more and 90 parts by mass or less, when the total content of the ether monoester derivative (A) and the ether diester derivative (B) is taken as 100 parts by mass.
The treatment agent for rayon spunlace according to claim 1, further comprising an anionic surfactant (C).
The treatment agent for rayon spunlace further contains an anionic surfactant (C),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), and the anionic surfactant (C) is 100 parts by mass,
The treatment agent for rayon spunlace according to claim 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, and the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less.
The treatment agent for rayon spunlace further contains an anionic surfactant (C),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), and the fatty acids (D) is 100 parts by mass,
The treatment agent for rayon spunlace according to claim 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less, and the fatty acid (D) in an amount of 0.1 parts by mass or more and 10 parts by mass or less.
The treatment agent for rayon spunlace further contains an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acid (D), and the polyhydric alcohol (E) is 100 parts by mass,
The treatment agent for rayon spunlace according to claim 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less, the fatty acid (D) in an amount of 0.1 parts by mass or more and 10 parts by mass or less, and the polyhydric alcohol (E) in an amount of 0.1 parts by mass or more and 70 parts by mass or less.
The treatment agent for rayon spunlace according to claim 1, further comprising the following lubricant (F).
Lubricant (F): At least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.
The rayon spunlace treating agent further contains an anionic surfactant (C), a polyhydric alcohol (E) (excluding esters), and the following lubricant (F),
When the total content of the ether monoester derivative (A), the ether diester derivative (B), the anionic surfactant (C), the fatty acid (D), the polyhydric alcohol (E), and the lubricant (F) is 100 parts by mass,
The treatment agent for rayon spunlace according to claim 1, comprising the ether monoester derivative (A) in an amount of 10 parts by mass or more and 85 parts by mass or less, the ether diester derivative (B) in an amount of 10 parts by mass or more and 85 parts by mass or less, the anionic surfactant (C) in an amount of 0.1 parts by mass or more and 20 parts by mass or less, the fatty acid (D) in an amount of 0.1 parts by mass or more and 10 parts by mass or less, the polyhydric alcohol (E) in an amount of 0.1 parts by mass or more and 70 parts by mass or less, and the lubricant (F) in an amount of 1 part by mass or more and 20 parts by mass or less.
Lubricant (F): At least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.
a first treatment agent for rayon spunlace, comprising the ether monoester derivative (A), the ether diester derivative (B), and the fatty acid (D), and optionally further comprising the following lubricant (F);
The treatment agent for rayon spunlace according to claim 1, which is constituted as a set with a second treatment agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters).
Lubricant (F): At least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.
The treatment agent for rayon spunlace according to any one of claims 1 to 10 and a solvent (S) as follows:
A composition containing a treatment agent for rayon spunlace, characterized in that the treatment agent for rayon spunlace is contained in an amount of 10 parts by mass or more and 99.99 parts by mass or less, and the solvent (S) is contained in an amount of 0.01 parts by mass or more and 90 parts by mass or less, when the total content of the treatment agent for rayon spunlace and the solvent (S) is 100 parts by mass.
Solvent (S): A solvent having a boiling point of 105° C. or lower at atmospheric pressure.
The composition containing a treatment agent for rayon spunlace according to claim 11, wherein the solvent (S) is water.
A second treatment agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters), or a second treatment agent for rayon spunlace containing at least one selected from an anionic surfactant (C) and a polyhydric alcohol (E) (excluding esters), and a composition containing a second treatment agent for rayon spunlace containing the following solvent (S),
A first treatment agent for rayon spunlace, comprising the following ether monoester derivative (A), the following ether diester derivative (B), and the following fatty acid (D), and optionally further comprising the following lubricant (F).
Ether monoester derivative (A): A compound in which a total of 1 mole or more and 30 moles or less of alkylene oxide having 2 or more and 3 or less carbon atoms is added per mole of fatty acid having 12 or more and 24 or less carbon atoms.
Ether diester derivative (B): A compound obtained by esterifying a compound in which a total of 1 mol to 30 mols of alkylene oxide having 2 to 3 carbon atoms are added per 1 mol of fatty acid having 12 to 24 carbon atoms and 1 mol of fatty acid having 12 to 24 carbon atoms (excluding polyethylene glycol dilaurate).
Fatty acids (D): At least one selected from fatty acids having 12 to 24 carbon atoms, and fats and oils.
Lubricant (F): At least one selected from a hydrocarbon compound, an ester (excluding fats and oils), and a silicone.
Solvent (S): A solvent having a boiling point of 105° C. or lower at atmospheric pressure.
A composition containing a first treatment agent for rayon spunlace, comprising the first treatment agent for rayon spunlace according to claim 13 and a solvent (S) as described below.
Solvent (S): A solvent having a boiling point of 105° C. or lower at atmospheric pressure.
A method for producing a spunlace nonwoven fabric, comprising the steps of:
Step 1: A step of adhering the treating agent for rayon spunlace according to any one of claims 1 to 10 to rayon.
Step 2: A step of subjecting the rayon obtained in step 1 to a carding step to produce a web.
Step 3: A step of entangling the web obtained in step 2 with a water flow to obtain a spunlace nonwoven fabric.