JP7384485B1 - Composition containing synthetic fiber treatment agent for spinning process, synthetic fiber, and method for treating synthetic fiber - Google Patents

Abstract

[Problem] A synthetic fiber treatment agent for a spinning process that can improve the storage stability of a composition containing a synthetic fiber treatment agent for a spinning process and a diluted solution, as well as improve the productivity of fibers to which the synthetic fiber treatment agent for a spinning process has been applied. The present invention provides compositions containing the same. The present invention provides a synthetic fiber treatment agent for a spinning process that includes a predetermined amount of a nonionic surfactant, a predetermined amount of an ionic surfactant, and optionally a predetermined amount of a smoothing agent, and a solvent. A composition containing a synthetic fiber treatment agent for a spinning process, which contains the solvent in a proportion of 0.1 parts by mass or more and less than 20 parts by mass, based on 100 parts by mass of the synthetic fiber treatment agent for a spinning process, It is characterized in that the content of bromine element in the synthetic fiber treatment agent for the spinning process is more than 0 ppm and not more than 300 ppm. [Selection diagram] None

Description

The present invention relates to a synthetic fiber treatment agent-containing composition for a spinning process that can improve storage stability, a synthetic fiber that can improve manufacturability, and a method for treating synthetic fibers.

Generally, in the spinning process of synthetic fibers, a treatment agent for synthetic fibers is sometimes applied to the surface of the synthetic fibers in order to reduce friction and reduce damage to the fibers such as yarn breakage.

Conventionally, a processing agent emulsion for synthetic fibers disclosed in Patent Document 1 has been known. Patent Document 1 discloses a synthetic fiber processing agent 100% by mass containing a smoothing agent in a proportion of 40 to 75% by mass, a surfactant in a proportion of 25 to 60% by mass, and a preservative in a proportion of 0.0005 to 0.01% by mass. A synthetic fiber treatment agent emulsion containing 20 to 100,000 parts by mass of water per part, characterized in that the dissolved oxygen concentration is 10 mg/L or less or the gas generation amount is 10 mL/L or less. A fiber treatment emulsion is disclosed.

JP2017-106148A

However, in the conventional processing agents for synthetic fibers, there has been a problem that the storage stability of synthetic fiber processing agent-containing compositions containing a small amount of solvent and diluted solutions diluted with solvents, which are expected to be stored for a long period of time, is insufficient. Furthermore, there was also the problem that the manufacturability, such as spinnability or false twisting processability, of the fibers to which the synthetic fiber treatment agent was applied was insufficient.

As a result of research to solve the above problems, the present inventors found that in a composition containing a synthetic fiber treatment agent for a spinning process containing a solvent, a predetermined amount of a nonionic surfactant, an ionic surfactant, and It has been found that a configuration in which a solvent is blended and the content of bromine element is defined within a predetermined range is suitable.

Each aspect of solving the above problems will be described.
The synthetic fiber treatment agent-containing composition for the spinning process of aspect 1 is a composition containing a synthetic fiber treatment agent for the spinning process, which contains a nonionic surfactant, an ionic surfactant, an organic preservative having a bromo group , and optionally a smoothing agent. A composition containing a synthetic fiber treatment agent for a spinning process, which contains a treatment agent and a solvent consisting of water or water and a lower alcohol, the nonionic surfactant in the synthetic fiber treatment agent for a spinning process, When the total content of the ionic surfactant and the smoothing agent is 100 parts by mass, the nonionic surfactant is 10 parts by mass or more and 99.8 parts by mass or less, and the ionic surfactant is 0. .01 parts by mass or more and 20 parts by mass or less, and the smoothing agent at a ratio of 80 parts by mass or less, and 0.1 parts by mass or more and 20 parts by mass of the solvent per 100 parts by mass of the synthetic fiber treatment agent for the spinning process. The content of the bromine element in the synthetic fiber treatment agent for the spinning process is more than 0 ppm and 300 ppm or less.

Aspect 2 is a composition containing a synthetic fiber treatment agent for a spinning process according to aspect 1, in which the content of bromine element in the synthetic fiber treatment agent for a spinning process is 0.1 ppm or more and 180 ppm or less.
Aspect 3 is a composition containing a synthetic fiber treatment agent for a spinning process according to aspect 1 or 2, wherein the synthetic fiber treatment agent for a spinning process does not contain the smoothing agent, and the ionic surfactant contains at least one selected from carboxylates, organic sulfonates, and organic phosphate ester salts.

Aspect 4 is a composition containing a synthetic fiber treatment agent for a spinning process according to aspect 3, wherein the total content of the nonionic surfactant and the ionic surfactant in the synthetic fiber treatment agent for the spinning process. When 100 parts by mass, the organic preservative is contained in a proportion of 0.001 part by mass or more and 1 part by mass or less.

Aspect 5 is a composition containing a synthetic fiber treatment agent for a spinning process according to aspect 1 or 2, wherein the synthetic fiber treatment agent for a spinning process contains the smoothing agent, and the smoothing agent is an aliphatic It contains an ester compound of alcohol and fatty acid, and the ionic surfactant contains at least one selected from carboxylates, organic sulfonates, and organic phosphate ester salts.

Aspect 6 is a composition containing a synthetic fiber treatment agent for a spinning process according to aspect 5, wherein the nonionic surfactant, the ionic surfactant, and the smoothing agent in the synthetic fiber treatment agent for the spinning process. When the total content of is 100 parts by mass, the organic preservative is contained in a proportion of 0.001 part by mass or more and 1 part by mass or less.

The synthetic fiber of Aspect 7 is characterized in that the synthetic fiber treatment agent for the spinning process described in any one of Aspects 1 to 6 is attached.
The method for treating synthetic fibers according to aspect 8 includes attaching the synthetic fiber treatment agent for the spinning process according to any one of aspects 1 to 6 to the synthetic fibers in an amount of 0.1% by mass or more and 5% by mass or less. It is characterized by causing

According to the present invention, it is possible to improve the storage stability of a composition containing a synthetic fiber treatment agent for a spinning process and a diluent, and to improve the productivity of fibers to which a synthetic fiber treatment agent for a spinning process has been applied.

<First embodiment>
EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment which embodies the synthetic fiber processing agent containing composition (henceforth a processing agent containing composition) for the spinning process of this invention is described. The treatment agent-containing composition of the present embodiment is a synthetic fiber treatment agent for the spinning process (hereinafter referred to as (referred to as a processing agent) and water or a solvent consisting of water and a lower alcohol .

(Nonionic surfactant)
The processing agent contains a nonionic surfactant. By including a nonionic surfactant in the treatment agent, it is possible to improve the productivity of the fibers to which the treatment agent has been applied. Furthermore, the emulsifying properties of a diluted solution in which the processing agent-containing composition is diluted with a solvent can be improved.

Nonionic surfactants include, for example, compounds with a (poly)oxyalkylene structure obtained by adding alkylene oxide to alcohols or carboxylic acids, and compounds having alkylene oxide added to ester compounds of carboxylic acids and polyhydric alcohols. Ether/ester compounds having a poly)oxyalkylene structure, compounds in which alkylene oxide is added to natural oils and fats or carboxylic acids, or compounds in which the compound and carboxylic acids are esterified, alkylene oxide is added to amine compounds (poly) ) Compounds having an oxyalkylene structure, compounds having a (poly)oxyalkylene structure obtained by adding alkylene oxide to fatty acid amides, and amide compounds obtained by condensing an amine compound with a carboxylic acid.

Specific examples of alcohols used as raw materials for nonionic surfactants include (1) methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetra Decanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, Straight chain alkyl alcohols such as triacontanol, (2) isopropanol, isobutanol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isotriacontanol, iso Hexadecanol, Isoheptadecanol, Isooctadecanol, Isononadecanol, Isoeicosanol, Isoheneicosanol, Isodocosanol, Isotricosanol, Isotetracosanol, Isopentacosanol, Iso Branched alkyl alcohols such as hexacosanol, isoheptacosanol, isooctacosanol, isononacosanol, isopentadecanol, (3) Straight chain alkenyl alcohols such as tetradecenol, hexadecenol, heptadecenol, octadecenol, nonadecenol, (4) Isohexa Branched alkenyl alcohols such as decenol and isooctadecenol, (5) cyclic alkyl alcohols such as cyclopentanol and cyclohexanol, (6) phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol, and Examples include aromatic alcohols such as styrenated phenol.

Specific examples of carboxylic acids used as raw materials for nonionic surfactants include (1) octyl acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, and hexadecanoic acid. , linear alkyl carboxylic acids such as heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, docosanoic acid, (2) 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, iso Branched alkyl carboxylic acids such as octadecanoic acid, (3) linear alkenyl carboxylic acids such as octadecenoic acid, octadecadienoic acid, octadecatrienoic acid, (4) aromatic carboxylic acids such as benzoic acid, (5) ricinoleic acid (6) Naturally derived 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.

The alkylene oxide used as a raw material for forming the (poly)oxyalkylene structure of the nonionic surfactant is preferably an alkylene oxide having 2 or more and 4 or less carbon atoms. Specific examples of alkylene oxide include ethylene oxide, propylene oxide, butylene oxide, and the like. The number of moles of alkylene oxide added is appropriately set, but is preferably 0.1 mole or more and 250 moles or less, more preferably 1 mole or more and 200 moles or less, and still more preferably 2 moles or more and 150 moles or less. Ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. Note that the number of moles of alkylene oxide added indicates the number of moles of alkylene oxide per mole of the compound to be added in the raw material. One type of alkylene oxide may be used alone, or two or more types may be used in an appropriate combination. When two or more types of alkylene oxides are used, their addition form may be block addition, random addition, or a combination of block addition and random addition, and is not particularly limited.

Specific examples of polyhydric alcohols used as raw materials for nonionic surfactants include ethylene glycol, propylene 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, Examples include 3-dimethyl-2,3-butanediol, glycerin, diglycerin, 2-methyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, and sorbitol.

Specific examples of amine compounds used as raw materials for nonionic surfactants include aliphatic amines such as methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine (stearylamine), octadecenylamine, and coconut amine. , monoethanolamine, diethanolamine, and other alkanolamines.

Specific examples of fatty acid amides used as raw materials for nonionic surfactants include octylic acid amide, lauric acid amide, palmitic acid amide, stearic acid amide, oleic acid amide, behenic acid amide, lignoceric acid amide, etc. It will be done.

Specific examples of nonionic surfactants include polyoxyalkylene lauryl ether, polyoxyalkylene butyl ether, polyoxyalkylene nonyl ether, polyoxyalkylene oleate, polyoxyalkylene hydrogenated castor oil ether trioleate, and polyoxyalkylene octyl. Examples include ether palmitate, diethanolamine oleic acid amide, and the like.

These nonionic surfactants may be used alone or in an appropriate combination of two or more.
In the processing agent, the lower limit of the content of the nonionic surfactant is preferably 10% by mass or more, more preferably 20% by mass or more. The upper limit of the content of the nonionic surfactant is preferably 99.8% by mass or less, more preferably 99.2% by mass or less. By specifying the content within this range, it is possible to improve the productivity of fibers to which the treatment agent has been applied. Furthermore, the emulsifying properties of a diluted solution in which the processing agent-containing composition is diluted with a solvent can be improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned. The processing agent in the processing agent-containing composition was obtained by evaporating the solvent in the processing agent-containing composition by heat-treating at 105° C. for 2 hours (the same applies hereinafter).

(ionic surfactant)
The processing agent contains an ionic surfactant. By including the ionic surfactant in the treatment agent, it is possible to improve the productivity of the fibers to which the treatment agent has been applied. Furthermore, the emulsifying properties of a diluted solution in which the processing agent-containing composition is diluted with a solvent can be improved.

As the ionic surfactant used in the treatment agent of this embodiment, any known ionic surfactant can be used as appropriate. Examples of ionic surfactants include anionic surfactants, cationic surfactants, and amphoteric surfactants.

As the anionic surfactant, any known one can be used as appropriate. Specific examples of anionic surfactants include (1) lauryl phosphate, cetyl phosphate, isocetyl phosphate, octyl phosphate, oleyl phosphate, stearyl phosphate, isostearyl phosphate; Phosphate ester salts of aliphatic alcohols such as acid ester salts, (2) aliphatic ester salts such as polyoxyethylene lauryl ether phosphate ester salts, polyoxyethylene oleyl ether phosphate ester salts, polyoxyethylene stearyl ether phosphate ester salts, etc. Phosphoric acid ester salt of alcohol with at least one alkylene oxide selected from ethylene oxide and propylene oxide, (3) lauryl sulfonate, myristyl sulfonate, cetyl sulfonate, oleyl sulfonate, stearyl sulfonate Salt, tetradecane sulfonate, secondary alkyl (C13 or more and 15 or less) sulfonate, secondary alkane (C11 or more and 14 or less) sulfonate, secondary alkyl (C12 or more and 15 or less) sulfonate, α-olefin sulfone Aliphatic sulfonates such as acid salts, organic sulfonates such as aromatic sulfonates such as dodecylbenzenesulfonate, (4) fats such as lauryl sulfate, oleyl sulfate, stearyl sulfate, etc. Aliphatic alcohols such as group alcohol sulfate ester salts, (5) polyoxyethylene lauryl ether sulfate salts, polyoxyalkylene (polyoxyethylene, polyoxypropylene) lauryl ether sulfate salts, polyoxyethylene oleyl ether sulfate salts (6) Castor oil fatty acid sulfate sulfate, sesame oil fatty acid sulfate sulfate, tall oil fatty acid sulfate sulfate, soybean oil fatty acid sulfate sulfate , rapeseed oil fatty acid sulfate ester salt, palm oil fatty acid sulfate ester salt, etc. (7) castor oil sulfate ester salt, sesame oil sulfate ester salt, tall oil sulfate ester salt, soybean oil sulfuric acid ester salt Ester salts, sulfate ester salts of natural oils and fats such as sulfate ester salts of rapeseed oil and sulfate ester salts of palm oil, (8) carboxylic acid salts such as 2-ethylhexanoate, laurate, oleate, and stearate. , (9) sulfosuccinate salts of aliphatic alcohols such as dioctyl sulfosuccinate, and (10) alkenyl succinates such as docosenyl succinate. Examples of counter ions for anionic surfactants include alkali metal salts such as potassium salts and sodium salts, alkanolamine salts such as ammonium salts, triethanolamine salts, (poly)oxyalkylenealkylamine salts, and dibutylethanolamine salts. Can be mentioned.

Specific examples of cationic surfactants include lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, behenyltrimethylammonium chloride, didecyldimethylammonium chloride, and the like.

Specific examples of amphoteric surfactants include betaine type amphoteric surfactants. These ionic surfactants may be used alone or in an appropriate combination of two or more.

Among these, when the treatment agent-containing composition is used for spinning/drawing applications (FDY) or spinning-false twisting applications (POY-DTY), organic phosphoric acids exemplified in (1) and (2) above are used. It is preferable to include at least one selected from ester salts, organic sulfonate salts exemplified in (3) above, and carboxylate salts exemplified in (8) above. By applying such a compound, the manufacturability such as spinnability or false twisting processability of the fiber to which the treatment agent has been applied can be further improved.

Specific examples of ionic surfactants include oleate, dodecenyl succinate, dioctyl sulfosuccinate, secondary alkyl (12 to 15 carbon atoms) sulfonate, polyoxyalkylene oleyl ether phosphate salt, isocetyl phosphate. Examples include acid ester salts and lauryl sulfate esters.

In the processing agent, the lower limit of the content of the ionic surfactant is preferably 0.01% by mass or more, more preferably 0.1% by mass or more. The upper limit of the content of such ionic surfactant is preferably 20% by mass or less, more preferably 15% by mass or less. By specifying the content within this range, it is possible to improve the productivity of fibers to which the treatment agent has been applied. Moreover, the emulsifying properties of the diluted solution of the processing agent-containing composition can be improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

(smoothing agent)
A smoothing agent may be added to the processing agent if necessary. In particular, when the treatment agent-containing composition is used for spinning and drawing (FDY) for flat yarn, a smoothing agent is blended. Note that when the treatment agent-containing composition is used for spinning and false twisting processing (POY-DTY) of processed yarn, for example, false twisted processed yarn (DTY), a smoothing agent is not necessarily blended. Examples of the smoothing agent include ester oil, mineral oil, and polyolefin.

Ester oils are not particularly limited, but include ester oils produced from fatty acids and alcohols. Examples of ester oils include ester oils produced from alcohol and fatty acids having an odd or even number of hydrocarbon groups, which will be described later.

The fatty acid that is the raw material for the ester oil is not particularly limited in its carbon number, presence or absence of branching, valence, etc., and may be a higher fatty acid, or a fatty acid having a cyclic cyclo ring, It may also be a fatty acid having an aromatic ring. There are no particular restrictions on the number of carbon atoms, presence or absence of branching, valence, etc. of the alcohol that is the raw material for ester oil. It may also be an alcohol having a group ring.

Specific examples of ester oils include (1) aliphatic monoalcohols and aliphatic monomers such as octyl palmitate, dodecyl oleate, oleyl laurate, oleyl oleate, isotridecyl stearate, and isotetracosyl oleate; Ester compounds with carboxylic acids, (2) 1,6-hexanediol didecanate, glycerin dioleate, glycerin trioleate, trimethylolpropane trilaurate, trimethylolpropane trioleate, trimethylolpropane with coconut fatty acids ester, ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids such as sorbitan monooleate, sorbitan trioleate, pentaerythritol tetraoctate, (3) diisostearyl adipate, dioleyl azelate, di Ester compounds of aliphatic monoalcohols and aliphatic polycarboxylic acids such as isostearylthiodipropionate, dioleylthiodipropionate, diisocetylthiodipropionate, (4) benzyl oleate, benzyl laurate ester compounds of aromatic monoalcohols and aliphatic monocarboxylic acids such as (5) ester compounds of aromatic polyhydric alcohols and aliphatic monocarboxylic acids such as bisphenol A dilaurate, (6) bis-2-ethylhexyl Ester compounds of aliphatic monoalcohols and aromatic polycarboxylic acids such as phthalate, diisostearylisophthalate, trioctyl trimellitate, etc. (7) Coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil , natural fats and oils such as sesame oil, fish oil, and beef tallow.

Examples of the mineral oil include aromatic hydrocarbons, paraffinic hydrocarbons, naphthenic hydrocarbons, and the like. More specifically, examples include spindle oil and liquid paraffin. Commercially available products can be appropriately used as these mineral oils.

As the polyolefin, poly-α-olefin used as a smooth component is applied. Specific examples of polyolefins include poly-α-olefins obtained by polymerizing 1-butene, 1-hexene, 1-decene, and the like. As the poly-α-olefin, commercially available products can be appropriately used.

These smoothing agents may be used alone or in combination of two or more.
Among these, when the treatment agent-containing composition is used for spinning/drawing applications (FDY), the smoothing agent preferably contains an ester compound obtained from an aliphatic alcohol and a fatty acid. By using such a compound, spinnability can be improved in spinning/drawing applications (FDY).

When a smoothing agent is used in the processing agent, the upper limit of the content of the smoothing agent in the processing agent is preferably 80% by mass or less, more preferably 77% by mass or less. When the treatment agent-containing composition is used in spinning and drawing applications (FDY) for flat yarn, the lower limit of the content of the smoothing agent is preferably 10% by mass or more, more preferably 20% by mass or more. By setting the amount within this range, the spinnability of the fibers to which the treatment agent has been applied can be improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

In the processing agent, when the total content of the nonionic surfactant, the ionic surfactant, and the smoothing agent is 100 parts by mass, the nonionic surfactant is contained in an amount of 10 parts by mass or more.99. The content ratio is defined as 8 parts by mass or less, the content of the ionic surfactant in the range of 0.01 part by mass to 20 parts by mass, and the content of the smoothing agent in the range of 80 parts by mass or less. By specifying the content within this range, it is possible to improve the productivity of fibers to which the treatment agent has been applied. Furthermore, the emulsifying properties of a diluted solution in which the processing agent-containing composition is diluted with a solvent can be improved.

(Organic preservative)
The processing agent-containing composition contains an organic preservative. Examples of organic preservatives include isothiazolone preservatives, triazine preservatives, nitrobromo preservatives, nitrochloro preservatives, thiocyanate preservatives, and the like.
In the present invention, an organic preservative having a bromo group is used. Hereinafter, the examples other than organic preservatives having a bromo group are used as reference examples.

Specific examples of isothiazolone preservatives include 5-chloro-2-methyl-4-isothiazolin-3-one, 2-n-butyl-3-isothiazolone, and 2-n-octyl-4-isothiazolin-3-one. , 2-benzyl-3-isothiazolone, 2-phenyl-3-isothiazolone, 2-methyl-4,5-dichloroisothiazolone, 5-chloro-2-methyl-3-isothiazolone, 2-methyl-4-isothiazolone-3- 1,2-benzisothiazolin-3-one, 2-methyl-4,5-trimethylene-4-isothiazolin-3-one, and the like.

Specific examples of triazine-based preservatives include hexahydro-1,3,5-tris(2-hydroxyethyl)-S-triazine, hexahydro-1,3,5-triethyl-S-triazine, and the like.

Specific examples of nitrobromo preservatives include 5-bromo-5-nitro-1,3-dioxane, 2-bromo-2-nitropropane-1,3-diol, and 2,2-dibromo-3-nitrilopropion. Examples include amide, 2,2-dibromo-2-nitromethanol, and the like.

Specific examples of nitrochloro preservatives include 5-chloro-5-nitro-1,3-dioxane, 2-chloro-2-nitropropane-1,3-diol, and the like.
Specific examples of thiocyanate preservatives include methylene bisthiocyanate and the like.

In the processing agent, the lower limit of the content of the organic preservative is preferably 0.0001% by mass or more, more preferably 0.001% by mass or more. When this content ratio is 0.0001% by mass or more, the storage stability of a diluted solution obtained by diluting the processing agent-containing composition with a solvent can be further improved. The upper limit of the content of the organic preservative is preferably 1% by mass or less, more preferably 0.5% by mass or less. When this content rate is 1% by mass or less, the storage stability of the processing agent-containing composition can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

If the processing agent does not contain a smoothing agent, and the total content of the nonionic surfactant and the ionic surfactant in the processing agent is 100 parts by mass, the lower limit of the content of the organic preservative is preferably contained in an amount of 0.0001 part by mass or more, more preferably 0.001 part by mass or more. When the content of the organic preservative is 0.0001 part by mass or more, the storage stability of a diluted solution obtained by diluting the processing agent-containing composition with a solvent can be further improved. If the processing agent does not contain a smoothing agent, and if the total content of the nonionic surfactant and the ionic surfactant in the processing agent is 100 parts by mass, then the upper limit of the content ratio of the organic preservative is preferably contained in an amount of 1 part by mass or less, more preferably 0.5 part by mass or less. When this content ratio is 1 part by mass or less, the storage stability of the processing agent-containing composition can be further improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

When the processing agent contains a smoothing agent, if the total content of the nonionic surfactant, the ionic surfactant, and the smoothing agent in the processing agent is 100 parts by mass, the amount of organic preservative The lower limit of the content is preferably 0.0001 parts by mass or more, more preferably 0.001 parts by mass or more. When the content of the organic preservative is 0.0001 part by mass or more, the storage stability of a diluted solution obtained by diluting the processing agent-containing composition with a solvent can be further improved. When the processing agent contains a smoothing agent, if the total content of the nonionic surfactant, the ionic surfactant, and the smoothing agent in the processing agent is 100 parts by mass, the amount of organic preservative The upper limit of the content ratio is preferably 1 part by mass or less, more preferably 0.5 part by mass or less. When this content ratio is 1 part by mass or less, the storage stability of the processing agent-containing composition can be further improved. Note that ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

(solvent)
The solvent to which the treatment agent-containing composition is provided has a boiling point of 105° C. or lower at atmospheric pressure. Examples of the solvent include water and organic solvents. In the present invention , water or a solvent consisting of water and a lower alcohol is used. Hereinafter, solvents other than water or water and lower alcohols are used as reference examples.
Specific examples of organic solvents include lower alcohols such as ethanol and propanol, and low polar solvents such as hexane. These solvents may be used alone or in an 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 handling properties.

In the treatment agent-containing composition, the lower limit of the proportion of the solvent to 100 parts by mass of the treatment agent is 0.1 part by mass or more, preferably 1 part by mass or more. When the blending ratio of such a solvent is 0.1 part by mass or more, the productivity of the fibers to which the treatment agent has been applied can be improved. In the treatment agent-containing composition, the upper limit of the blending ratio of the solvent is less than 20 parts by mass, preferably 18 parts by mass or less, with respect to 100 parts by mass of the treatment agent. When the blending ratio of such a solvent is less than 20 parts by mass, the storage stability of the processing agent-containing composition can be improved. In addition, ranges in which the above upper and lower limits are arbitrarily combined are also envisioned.

(others)
The lower limit of the content of bromine element in the treatment agent is more than 0 ppm, preferably 0.1 ppm or more. When the lower limit of the content of the bromine element is more than 0 ppm, the storage stability of a diluted solution obtained by diluting the treatment agent-containing composition with a solvent can be improved. The upper limit of the content of bromine element in the treatment agent is 300 ppm or less, preferably 180 ppm or less. When the upper limit of the content of the bromine element is 300 ppm or less, the storage stability of the processing agent-containing composition can be improved.

As for the content of bromine element in the treatment agent, if it is 10 ppm or more, the value measured using fluorescent X-ray analysis is adopted, and if it is less than 10 ppm, the value measured by combustion ion chromatography is adopted. The content of bromine element in the treatment agent is measured as follows. 1 g of the treatment agent-containing composition was collected in a petri dish (outer diameter 5 cm, height 15 mm, thickness 0.6 mm) and heat-treated at 105° C. for 2 hours to volatilize the solvent in the treatment agent-containing composition and leave the residue. A processing agent consisting of non-volatile components is obtained. Fluorescent X-ray analysis is performed by collecting a certain amount of the remaining nonvolatile matter, and measuring the intensity of bromine's fluorescent X-rays (Br-Kα) under vacuum conditions using a fluorescent X-ray analyzer (for example, ZSX Primus, manufactured by Rigaku Corporation). line) is measured. For the bromine element content, a calibration curve is created using a known processing agent sample, and the bromine element content of the target processing agent is quantified.

<Second embodiment>
Next, a second embodiment embodying the synthetic fiber according to the present invention will be described. The synthetic fiber of this embodiment is a synthetic fiber to which the treatment agent described in the first embodiment is attached. When applying the treatment agent to the synthetic fibers, the treatment agent-containing composition of the first embodiment is further diluted with a diluting solvent, and the treatment agent is applied as a diluted solution, such as a low-viscosity mineral oil solution, an organic solvent solution, an aqueous solution, etc. You may. Synthetic fibers are obtained through a process in which a diluted liquid such as an aqueous liquid is attached to synthetic fibers in a spinning process. The diluent attached to the synthetic fiber may undergo a stretching process and a drying process to evaporate the diluting solvent. The spinning process includes a spinning-drawing process that includes a stretching process after spinning, a spinning-false-twisting process that includes a false-twisting process without a stretching process, and the like.

Specific examples of synthetic fibers to which the treatment agent is applied are not particularly limited, and include (1) polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and the like. Polyester fibers such as composite fibers containing polyester resins, (2) polyamide fibers such as nylon 6 and nylon 66, (3) polyacrylic fibers such as polyacrylic and modacrylic, (4) polyethylene and polypropylene. Examples include polyolefin fibers such as.

There is no particular restriction on the proportion of the treatment agent to be attached to the synthetic fibers, but the treatment agent should be attached to the synthetic fibers in a proportion of 0.1% by mass or more and 5% by mass or less (excluding solvents such as water). is preferred. This configuration further improves the effects of the present invention. The method for applying the treatment agent is not particularly limited; for example, known methods such as a roller lubrication method, a guide lubrication method using a metering pump, an immersion lubrication method, and a spray lubrication method can be employed.

The effects of the processing agent-containing composition and synthetic fiber of the above embodiment will be explained.
(1) In the processing agent-containing composition of the above embodiment, a processing agent containing a predetermined amount of a nonionic surfactant, a predetermined amount of an ionic surfactant, an organic preservative, and optionally a smoothing agent; and a solvent containing water. Further, the content of bromine element in the processing agent was specified to be more than 0 ppm and less than 300 ppm. Therefore, the storage stability of processing agent-containing compositions and diluted solutions that are expected to be stored for a long period of time can be improved. Manufacturability such as spinnability or false twisting processability of the fibers to which the treatment agent has been applied can be improved. Furthermore, the emulsifying properties of a diluted solution in which the processing agent-containing composition is further diluted with a solvent can be improved.

Note that the above embodiment may be modified as follows. The above embodiment and the following modifications can be implemented in combination with each other within a technically consistent range.
・In the above-mentioned processing agent, processing agent-containing composition, and diluent, a stabilizer for maintaining the quality of the processing agent, etc., may be added during or after the production of the processing agent, etc., within a range that does not impede the effects of the present invention. , an antistatic agent, a binder, an antioxidant, an ultraviolet absorber, an antifoaming agent, a preservative other than the above, a rust preventive, and other components commonly used in processing agents may be further blended.

Examples will be given below to make the structure and effects of the present invention more specific, but the present invention is not limited to these Examples. In the Examples and Comparative Examples below, parts mean parts by mass, and % means % by mass, unless otherwise specified.

Test category 1 (preparation of treatment agent)
(Example 1)
As shown in Table 1, 42 parts of dodecyl oleate (A-2), 12 parts of trimethylolpropane trilaurate (A-3), and 4 parts of sorbitan monooleate (A-5) were used as smoothing agents. , 6 parts of polyoxyethylene (5 mol: indicates the number of added moles of alkylene oxide (the same applies hereinafter)) lauryl ether (B-1) as a nonionic surfactant, polyoxyethylene (6 mol), polyoxypropylene (10 mol) 6 parts of butyl ether (B-2), 12 parts of polyoxyethylene (12 mol) hydrogenated castor oil ether trioleate (B-5), polyoxyethylene (5 mol) octyl ether palmitate (B- 6), 2 parts of potassium oleate (C-1) as an ionic surfactant, 3 parts of potassium dodecenyl succinate (C-2), sodium secondary alkyl (12 to 15 carbon atoms) sulfonate ( C-4), 0.04 parts of 2-bromo-2-nitropropane-1,3-diol (DB-1) as an organic preservative, and 1,1,3-tris(2) as other components. - A processing agent containing 0.1 part of methyl-4-hydroxy-5-t-butylphenyl)butane (E-1), 2 parts of polyether-modified silicone (E-2), and 1 part of ethylene glycol, and a solvent. A treatment agent-containing composition of Example 1 was prepared by mixing 11 parts of water to 100 parts by mass of the treatment agent.

(Examples 2 to 13, Comparative Examples 1 to 7)
The processing agent-containing compositions of Examples 2 to 13 and Comparative Examples 1 to 7 were prepared in the same manner as the processing agent-containing composition of Example 1, and were treated with a smoothing agent, a nonionic surfactant, an ionic surfactant, and an organic surfactant. It was prepared to contain a preservative, other components, and a solvent in the proportions shown in Tables 1 and 2. The processing agent-containing composition shown in Table 1 was prepared as a spinning and drawing oil containing a smoothing agent. The treatment agent-containing composition shown in Table 2 was prepared as a spinning-false twisting oil agent that does not contain a smoothing agent.

Type and content of smoothing agent, type and content of nonionic surfactant, type and content of ionic surfactant, type and content of organic preservative, type and content of other components, and The type and content of the solvent can be found in Tables 1 and 2 in the "Smoothing agent" column, "Nonionic surfactant" column, "Ionic surfactant" column, "Organic preservative" column, and "Other ingredients". column and “Solvent” column, respectively. The content of each component is expressed based on 100 parts of the total content of a nonionic surfactant, an ionic surfactant, and a smoothing agent added as necessary.

Moreover, the content (ppm) of bromine element in the processing agent was determined from the content ratio of the organic preservative containing bromine element and other components, potassium bromine. The results are shown in the "Content of bromine element in processing agent" column.

Details of the smoothing agent, nonionic surfactant, ionic surfactant, organic preservative, and other components listed in Tables 1 and 2 are as follows.

<Smoothing agent>
A-1: Octyl palmitate A-2: Dodecyl oleate A-3: Trimethylolpropane trilaurate A-4: Sesame oil A-5: Sorbitan monooleate A-6: Glycerin dioleate A-7: Mineral Oil (30°C, 47mm ² /s)
<Nonionic surfactant>
B-1: Polyoxyethylene (5 mol) lauryl ether B-2: Polyoxyethylene (6 mol) polyoxypropylene (10 mol) butyl ether B-3: Polyoxyethylene (6 mol) polyoxypropylene (4 mol) Nonyl ether B-4: Polyoxyethylene (5 mol) oleate B-5: Polyoxyethylene (12 mol) hydrogenated castor oil ether trioleate B-6: Polyoxyethylene (5 mol) octyl ether palmitate B-7 : Diethanolamine oleic acid amide <Ionic surfactant>
C-1: Potassium oleate C-2: Potassium dodecenyl succinate C-3: Sodium dioctyl sulfosuccinate C-4: Secondary alkyl (12 to 15 carbon atoms) sodium sulfonate C-5: Polyoxyethylene (2 mol) Salt of oleyl ether phosphate and polyoxyethylene (2 mol) laurylamine C-6: Salt of isocetyl phosphate and potassium c-1: Lauryl sulfate <Preservative>
DB-1: 2-bromo-2-nitropropane-1,3-diol DB-2: 2,2-dibromo-3-nitrilopropionamide D-1: 2-methyl-4-isothiazolin-3-one D- 2: 5-chloro-2-methyl-4-isothiazolin-3-one D-3: 1,2-benzisothiazolin-3-one D-4: Methylene bisthiocyanate D-5: Hexahydro-1,3,5- Tris(2-hydroxyethyl)-S-triazine <Other ingredients>
E-1: 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane E-2: Polyether modified silicone E-3: Ethylene glycol E-4: Propylene glycol E- 5: Potassium bromide Test category 2 (evaluation of oil stability)
Each treatment agent-containing composition prepared as described above was stored in an incubator at 50°C for one week, and the changes before and after storage were visually judged based on the following criteria. The oil stability was evaluated as storage stability. The results are shown in the "Oil agent stability" column of Tables 1 and 2.

・Evaluation criteria for oil agent stability ◎ (Good): No change ○ (Acceptable): Slight discoloration, generation of particles, component separation, but no practical problems × (Unacceptable): Significant discoloration, generation of particles Or if there is component separation Test Category 3 (Evaluation of emulsifying property)
Add 25°C ion-exchanged water into a 200 mL beaker, and add the treatment agent-containing composition dropwise while stirring at 550 rpm using a stirring blade to make an emulsion as a diluted liquid so that the treatment agent concentration is 10% by mass. 100g was prepared. The emulsifying property was evaluated based on the following criteria by visually judging the emulsifying state at that time. The results are shown in the "emulsifying property" column of Tables 1 and 2.

・Evaluation criteria for emulsifying properties ○ (Acceptable): Uniformly emulsified or dispersed, with no suspended matter or precipitates × (Unacceptable): Not uniformly emulsified or dispersed, with suspended matter or precipitates remaining Case Test Category 4 (Spinning property)
Chips of polyethylene terephthalate having an intrinsic viscosity of 0.64 and a titanium oxide content of 0.2% by mass were dried by a conventional method, then spun at 295° C. using an extruder, extruded from a spinneret, and solidified by cooling. After that, an emulsion as a diluted solution of a processing agent-containing composition prepared to a concentration of 10% is applied to the running yarn by a guide oiling method using a metering pump, so that the amount of the processing agent attached is 1.0% by mass. It was attached like this. The processing agent-containing composition used was an oil agent for spinning and drawing shown in Table 1. Thereafter, it was converged with a guide and stretched using a first godet roller with a surface speed of 1400 m/min and a surface temperature of 90°C, and a second godet roller with a surface speed of 4800 m/min and a surface temperature of 150°C. Thereafter, the yarn was wound at a speed of 4,800 m/min to obtain a drawn yarn of 83 decitex and 36 filaments.

Regarding the fibers to which the treatment agent was applied, spinnability as a measure of productivity was evaluated as follows. Immediately before winding when 550,000 m of drawn yarn was produced, the number of fluffs per hour was measured using a fluff counting device (DT-105 manufactured by Toray Engineering Co., Ltd.), and evaluated according to the following criteria. The results are shown in the "Spinning Properties" column of Table 1.

・Evaluation criteria for spinnability ◎ (Good): Number of fuzz is 0 ○ (Acceptable): Number of fuzz is 1 or more and 5 or less × (Not acceptable): Number of fuzz is 6 or more Test category 5 (False twisting processability)
Chips of polyethylene terephthalate having an intrinsic viscosity of 0.64 and a titanium oxide content of 0.2% by mass were dried by a conventional method, then spun at 295° C. using an extruder, extruded from a spinneret, and solidified by cooling. After that, an emulsion as a diluted solution of a processing agent-containing composition prepared to a concentration of 10% is applied to the running yarn by a guide oiling method using a metering pump, so that the amount of the processing agent attached is 0.4% by mass. It was attached like this. The processing agent-containing composition used was an oil agent for spinning and false twisting shown in Table 2. Thereafter, the yarn was bundled with a guide and wound up at a speed of 3300 m/min without mechanical stretching to obtain a partially drawn yarn of 128 decitex and 36 filaments.

Thereafter, using the partially drawn yarn obtained above, a contact heater type false twisting machine (ATF-21 manufactured by TMT Machinery Co., Ltd.) was used to process the yarn at a processing speed of 800 m/min, a stretching ratio of 1.60, and a twisting method. : 3-axis disc external friction method (1 guide disk on entry side, 1 guide disk on exit side, 5 hard polyurethane disks), heater on twisting side = length 2.5m, surface temperature 190℃, heater on untwisting side False twisting was performed under the conditions of = none and target number of twists = 3300 T/m to obtain a false twisted yarn.

Regarding the fibers to which the treatment agent was applied, the false twisting processability as a measure of manufacturability was evaluated as follows. Before winding the false twisted yarn, the number of fuzz was measured using a fuzz counting device (DT-105 manufactured by Toray Engineering Co., Ltd.), and the average number of fuzz per hour was calculated and evaluated according to the following criteria. The results are shown in the "False twisting processability" column of Table 2.

・Evaluation criteria for false twisting workability ◎ (Good): The number of measured fuzz is less than 3 ○ (Acceptable): The number of measured fuzz is 3 or more and less than 6 × (Unacceptable): The number of measured fuzz is less than 3 6 or more Test category 6 (emulsion tank cleaning cycle)
In the production of the above-mentioned drawn yarn or partially drawn yarn, the number of days until scum was generated in the emulsion tank containing the emulsion as a diluent and the emulsion tank needed to be cleaned was determined based on the following criteria. Thereby, the storage stability of the diluted solution was evaluated as an emulsion tank cleaning cycle. The necessity of cleaning was determined by confirming an increase in fuzz and yarn breakage during the production of synthetic fibers, and a decrease in the amount of treatment agent attached to the produced synthetic fibers. The results are shown in the "Emulsion tank cleaning cycle" column of Tables 1 and 2.

・Evaluation criteria for emulsion tank cleaning cycle ◎ (good): 14 days or more ○ (acceptable): 7 days or more and 13 days or less × (impossible): 6 days or less As is clear from the results in Tables 1 and 2, each implementation The processing agent of the example was evaluated as fair or better in all of the oil stability, emulsifying property, spinnability or false twisting processability, and emulsion tank cleaning cycle. According to the present invention, it is possible to improve the storage stability of a treatment agent-containing composition and a diluted solution, and to improve the productivity of fibers to which a treatment agent has been applied. Furthermore, the emulsifying properties of a diluted solution in which the processing agent-containing composition is further diluted with a solvent can be improved.

Claims (8)

A synthetic fiber treatment agent for the spinning process containing a nonionic surfactant, an ionic surfactant, an organic preservative having a bromo group , and optionally a smoothing agent, and a solvent consisting of water or water and a lower alcohol. A synthetic fiber treatment agent-containing composition for a spinning process, comprising:
When the total content of the nonionic surfactant, the ionic surfactant, and the smoothing agent in the synthetic fiber treatment agent for the spinning process is 100 parts by mass, the nonionic surfactant is 10 parts by mass. The ionic surfactant is contained in a proportion of 0.01 parts by mass to 20 parts by mass, and the smoothing agent is contained in a proportion of 80 parts by mass or less,
Containing the solvent in a proportion of 0.1 parts by mass or more and less than 20 parts by mass with respect to 100 parts by mass of the synthetic fiber treatment agent for the spinning process,
A composition containing a synthetic fiber treatment agent for a spinning process, wherein the content of bromine element in the synthetic fiber treatment agent for a spinning process is more than 0 ppm and 300 ppm or less. The composition containing a synthetic fiber treatment agent for a spinning process according to claim 1, wherein the content of bromine element in the synthetic fiber treatment agent for a spinning process is 0.1 ppm or more and 180 ppm or less. The synthetic fiber treatment agent for the spinning process does not contain the smoothing agent,
The synthetic fiber treatment agent-containing composition for a spinning process according to claim 1, wherein the ionic surfactant contains at least one selected from carboxylates, organic sulfonates, and organic phosphate ester salts. When the total content of the nonionic surfactant and the ionic surfactant in the synthetic fiber treatment agent for the spinning process is 100 parts by mass, the organic preservative is 0.001 part by mass or more and 1 part by mass. 4. The synthetic fiber treatment agent-containing composition for a spinning process according to claim 3, wherein the composition contains a synthetic fiber treatment agent for a spinning process. The synthetic fiber treatment agent for the spinning process contains the smoothing agent,
A claim in which the smoothing agent includes an ester compound of an aliphatic alcohol and a fatty acid, and the ionic surfactant includes at least one selected from carboxylates, organic sulfonates, and organic phosphate ester salts. Item 1. A synthetic fiber treatment agent-containing composition for a spinning process according to item 1. When the total content of the nonionic surfactant, the ionic surfactant, and the smoothing agent in the synthetic fiber treatment agent for the spinning process is 100 parts by mass, the organic preservative is 0.001 parts by mass. The synthetic fiber treatment agent-containing composition for a spinning process according to claim 5, which is contained in a proportion of not less than 1 part by mass and not more than 1 part by mass. A synthetic fiber characterized in that the synthetic fiber treatment agent for the spinning process according to any one of claims 1 to 6 is attached. A synthetic fiber, characterized in that the synthetic fiber treatment agent for the spinning process according to any one of claims 1 to 6 is attached to the synthetic fiber in an amount of 0.1% by mass or more and 5% by mass or less. Processing method.