KR102201236B1 - Synthetic fiber treatment agent and synthetic fiber - Google Patents

Abstract

The treatment agent for synthetic fibers of the present invention is characterized by containing the following leveling agent, a nonionic surfactant, the following ionic surfactant, and the following hydroxy compound. The leveling agent is at least one ester compound selected from an ester compound of a polyhydric alcohol and a monohydric carboxylic acid, and an ester compound of a monohydric alcohol and a polyhydric carboxylic acid. Ionic surfactants are ionic surfactants containing certain sulfonic acid compounds. The hydroxy compound is at least one hydroxy compound selected from polyhydric alcohols having 2 to 6 carbon atoms and at least one hydroxy compound selected from monohydric alcohols having 1 to 15 carbon atoms.

Description

Synthetic fiber treatment agent and synthetic fiber

The present invention relates to a treatment agent for synthetic fibers capable of exhibiting excellent process passability in a spinning process of synthetic fibers and further improving production efficiency, and to a synthetic fiber to which such treatment agent is attached.

In general, from the viewpoint of reducing friction in the weaving process of synthetic fibers and preventing fiber damage such as thread breakage, a treatment agent for synthetic fibers containing a surfactant may be applied to the surface of the filament yarn bath of synthetic fibers.

Conventionally, for example, a treatment agent for synthetic fibers disclosed in Patent Documents 1 to 4 is known. Patent Document 1 discloses a treatment agent for synthetic fibers containing alkylene glycol or the like. Patent Document 2 discloses a treatment agent for synthetic fibers containing polyhydric alcohols and oxycarboxylic acids. Patent Document 3 discloses a treatment agent for synthetic fibers using alkylene glycol as an appearance modifier and alcohol as a diluent. Patent Document 4 discloses a treatment agent for synthetic fibers containing an organic sulfonic acid compound or the like having a specific structure and controlling the content of sulfate ions and chlorine ions to a specific concentration or less.

Japanese Patent Publication No. 2003-253565 Japanese Patent Laid-Open No. Hei 7-216734 Japanese Patent Publication No. 2006-097167 Japanese Patent Publication No. 2016-065324

In such a conventional treatment agent for synthetic fibers, in particular, it was not possible to sufficiently achieve both the process passability under the production conditions in the recent spinning process, for example, under conditions such as high temperature and high speed, and each function such as high efficiency of production. .

For example, in the formulation of Patent Document 1, there is a problem that it is not possible to reduce tar contamination and fluff generated around the godet roller, and thus process passability is poor. In addition, for example, there is a problem that the production efficiency cannot be improved due to poor tar cleaning properties.

In the formulation of Patent Documents 2 and 3, especially in the spinning process for items with high fineness such as industrial materials, for example, tar generation around the godet roller, 100% contamination around the base, and fluff cannot be reduced, so the process passability. There was a problem that it fell. In addition, for example, there is a problem that the production efficiency cannot be improved due to poor tar cleaning properties around the godet roller.

In Patent Document 4, under strict spinning conditions, for example, under conditions such as high temperature increase and high speed, there is a problem in that the process passability is inferior, in particular, due to the inability to reduce 100% contamination and fluff around the base. In addition, for example, there is a problem that the production efficiency cannot be improved due to poor tar cleaning properties around the godet roller.

The problem to be solved by the present invention is to provide a treatment agent for synthetic fibers and a synthetic fiber capable of further improving production efficiency by exerting excellent process passability in the spinning process of synthetic fibers.

As a result of researching to solve the above problems, the present inventors have found that a treatment agent for synthetic fibers containing a specific leveling agent, a nonionic surfactant, a sulfonic acid compound having a specific structure, and a specific hydroxy compound is suitably suitable.

That is, in one aspect of the present invention, there is provided a treatment agent for synthetic fibers comprising the following leveling agent, a nonionic surfactant, the following ionic surfactant, and the following hydroxy compound. The leveling agent is at least one ester compound selected from an ester compound of a polyhydric alcohol and a monohydric carboxylic acid and an ester compound of a monohydric alcohol and a polyhydric carboxylic acid. The ionic surfactant is an ionic surfactant containing a sulfonic acid compound represented by the following formula (1). The hydroxy compound is at least one hydroxy compound selected from polyhydric alcohols having 2 to 6 carbon atoms and at least one hydroxy compound selected from monohydric alcohols having 1 to 15 carbon atoms.

(In formula 1,

a, b: an integer greater than or equal to 0 and satisfying a+b = 5 to 17,

M ¹ : alkali metal, ammonium group, or organic amine group)

It is preferable that the polyhydric alcohol in the hydroxy compound is at least one selected from ethylene glycol, propylene glycol, glycerin and diethylene glycol.

It is more preferable that the polyhydric alcohol in the hydroxy compound is at least one selected from ethylene glycol and glycerin.

It is preferable that the monohydric alcohol in the hydroxy compound is at least one selected from methanol, ethanol, isopropyl alcohol, 2-ethylhexanol, ethylene glycol monobutyl ether, and diethylene glycol monobutyl ether.

It is more preferable that the monohydric alcohol in the hydroxy compound is at least one selected from methanol and isopropyl alcohol.

It is preferable that the mass ratio of the polyhydric alcohol in the hydroxy compound to the sulfonic acid compound in the ionic surfactant is the content of the polyhydric alcohol/the content of the sulfonic acid compound = 0.01/1 to 4/1.

It is preferable that the mass ratio of the monohydric alcohol in the hydroxy compound to the sulfonic acid compound in the ionic surfactant is the content of the monohydric alcohol/the content of the sulfonic acid compound = 0.005/1 to 0.5/1.

It is preferable that the ionic surfactant further contains a phosphoric acid ester compound. That is, the treatment agent for synthetic fibers may further contain a phosphate ester compound as an additional ionic surfactant.

When the sum of the content ratios of the leveling agent, the nonionic surfactant, the ionic surfactant and the hydroxy compound is 100% by mass, the treatment agent for synthetic fibers is 30 to 70% by mass, and the nonionic It is preferable to contain a surfactant in an amount of 20 to 60% by mass, 0.1 to 20% by mass of the ionic surfactant, and 0.001 to 5% by mass of the hydroxy compound.

Further, in another aspect of the present invention, there is provided a synthetic fiber characterized in that the treatment agent for synthetic fibers is adhered.

According to the present invention, excellent process passability can be exhibited in the spinning process of synthetic fibers, and production efficiency can be further improved.

(First embodiment)

First, a description will be given of a first embodiment in which the treatment agent for synthetic fibers according to the present invention (hereinafter, also simply referred to as a treatment agent) is embodied. The treatment agent of this embodiment is a treatment agent for synthetic fibers comprising a specific leveling agent, a nonionic surfactant, a specific ionic surfactant, and a specific hydroxy compound.

The leveling agent contains at least one ester compound selected from an ester compound of a polyhydric alcohol and a monohydric carboxylic acid, and an ester compound of a monohydric alcohol and a polyhydric carboxylic acid.

The ionic surfactant contains a sulfonic acid compound represented by the following general formula (2).

(In formula 2,

a, b: an integer greater than or equal to 0 and satisfying a+b = 5 to 17,

M ¹ : alkali metal, ammonium group, or organic amine group)

The hydroxy compound contains at least one hydroxy compound selected from polyhydric alcohols having 2 to 6 carbon atoms and at least one hydroxy compound selected from monohydric alcohols having 1 to 15 carbon atoms.

As a specific example of the leveling agent provided to the treatment agent of this embodiment, for example, (1) 1,4-butanediol dioleate, trimethylolpropane trilaurate, trimethylolpropane trioleate, pentaerythritol tetraoctanoate, Ester compounds of polyhydric alcohols such as sorbitan monooleate, sorbitan trioleate, glycerin monolaurate, glycerin trilaurate, and glycerin trioleate with monohydric carboxylic acids, (2) dioleyl adipate, trioctyl Ester compounds of polyhydric carboxylic acids such as trimellitate and monohydric alcohols, (3) natural fats and oils such as refined rapeseed oil, palm oil and palm oil, (4) dioctyl thiodipropionate, diisolauryl thiodipropio Polyhydric alcohols such as nate, dilauryl thiodipropionate, diisocetyl thiodipropionate, diisostearyl thiodipropionate, and dioleyl thiodipropionate, and a polyhydric having a sulfur element in the molecule And sulfur-containing ester compounds with carboxylic acid. These specific examples may be used individually by 1 type, and may be used in combination of 2 or more types. Among these, trimethylolpropane trioleate, glycerin trioleate, palm oil, dioleyl adipate, and diisocetyl thiodipropionate are preferable.

Specific examples of the nonionic surfactant to be used in the treatment agent of the present embodiment are not particularly defined, but, for example, (1) 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. One compound, for example, polyoxyethylene monolauric acid ester, polyoxyethylene monooleic acid ester, polyoxyethylene lauric acid ester methyl ether, polyoxyethylene octyl ether, polyoxypropylene lauryl ether methyl ether, polyoxybutyl Ren oleyl ether, polyoxyethylene polyoxypropylene lauryl ether, polyoxyethylene polyoxypropylene nonylphenyl ether, polyoxyethylene lauryl amino ether, polyoxyethylene lauroamide ether, polyoxyethylene diethanolamine monooleyl Ether-type nonionic surfactants such as amides, (2) polyethylene glycol dioleate, polyoxyethylene sorbitan monooleate, polyoxybutylene sorbitantrioleate, polyoxypropylene castor oil, polyoxyethylene hydrogenated castor oil , Polyoxyethylene propylene hydrogenated castor oil trioleate, polyoxyethylene castor oil trilaurate, polyoxyethylene castor oil and/or polyoxyethylene hydrogenated castor oil and ether ester compound condensed with dicarboxylic acid, polyoxyethylene Castor oil and/or polyoxyethylene hydrogenated castor oil and an ether ester compound obtained by condensing monocarboxylic and dicarboxylic acids, polyoxyalkyls such as bispolyoxyethylene lauryl adipate and bispolyoxyethylene oleyl adipate And alkylamide-type nonionic surfactants such as ene ether ester type nonionic surfactant and (3) diethanolamine monolauroamide. These specific examples may be used individually by 1 type, and may be used in combination of 2 or more types.

Moreover, as a specific example of the alkylene oxide used for this nonionic surfactant, ethylene oxide, propylene oxide, butylene oxide, etc. are mentioned, for example. In addition, specific examples of the organic acid to be used include, for example, lauric acid, myristic acid, myristic oleic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachid. Acid, eicosenoic acid, behenic acid, erucic acid, palm fatty acid, maleic acid, fumaric acid, adipic acid, and the like.

Specific examples of the ionic surfactant that can be provided to the treatment agent of the present invention include, for example, (1) carboxylic acid soap-type ionic surfactants such as potassium octanoate, potassium oleate, and potassium alkenylsuccinate, (2) Sulfonic acid ester-type ionic surfactants such as pentadecylsulfonic acid sodium salt, dodecylbenzenesulfonic acid sodium salt, dioctylsulfosuccinic acid sodium salt, etc., (3) polyoxyethylene lauryl sulfate sodium salt, hexadecyl sulfate potassium salt, tallow sulfide Sulfuric acid ester type ionic surfactants such as oil and castor oil sulfide oil, (4) octyl phosphate sodium salt, polyoxyethylene lauryl phosphate potassium salt, oleyl phosphate triethanolamine salt, polyoxyethylene oleyl phosphate polyoxyethylene lauryl Phosphoric acid ester type ionic surfactants, such as an amine salt and a polyoxyethylene oleyl phosphate dibutyl ethanolamine salt, are mentioned. These specific examples may be used individually by 1 type, and may be used in combination of 2 or more types.

Among the ionic surfactants, it is necessary to contain at least a sulfonic acid compound (alkyl sulfonate) having a structure represented by the above-described formula (2). Further, in the above-described Formula 2, a compound having a value of 5 to 17, M ¹ is sodium (mixture), a compound having a value of a+b of 5 to 17, and M ¹ is triethanolamine (mixture) are preferred. .

In addition, oleyl phosphate dibutyl ethanolamine salt, isocetyl phosphate polyoxyethylene (EO4, here the number following EO indicates the number of moles added of ethylene oxide. The same hereinafter is the same) laurylaminoether salt, polyoxyethylene (EO5) ) It is more preferable to contain phosphoric acid ester compounds such as oleyl ether phosphate triethanolamine salt.

As the hydroxy compound provided to the treatment agent of the present embodiment, as described above, at least one hydroxy compound selected from polyhydric alcohols having 2 to 6 carbon atoms and at least one hydroxy compound selected from monohydric alcohols having 1 to 15 carbon atoms Contains compounds.

As the polyhydric alcohol, it is preferable to contain at least one selected from ethylene glycol, propylene glycol, glycerin, diethylene glycol, and diglycerin. Further, among these, it is more preferable to contain at least one selected from ethylene glycol and glycerin.

As the monohydric alcohol, it is preferable to contain at least one selected from methanol, ethanol, isopropyl alcohol, 2-ethylhexanol, ethylene glycol monobutyl ether, and diethylene glycol monobutyl ether. Moreover, among these, it is more preferable to contain at least one selected from methanol and isopropyl alcohol. Specific examples of such a hydroxy compound may be used singly or in combination of two or more.

In the treatment agent of the present invention, the content ratio of the above-described leveling agent, nonionic surfactant, ionic surfactant, and hydroxy compound is not particularly limited. When the total content of the above-described leveling agent, nonionic surfactant, ionic surfactant, and hydroxy compound is 100% by mass, the treatment agent is 30 to 70% by mass of leveling agent and 20 to 60% by mass of nonionic surfactant. % And an ionic surfactant in an amount of 0.1 to 20% by mass, and a hydroxy compound in an amount of 0.001 to 5% by mass. By defining within this range, the effect of the present invention can be further improved.

Further, it is preferable that the mass ratio of the polyhydric alcohol in the hydroxy compound to the sulfonic acid compound in the ionic surfactant is the polyhydric alcohol content/the sulfonic acid compound content = 0.01/1 to 4/1. By defining in such a range, the effect of the present invention can be further improved.

Further, it is preferable that the mass ratio of the monohydric alcohol in the hydroxy compound to the sulfonic acid compound in the ionic surfactant is the content of the monohydric alcohol/the content of the sulfonic acid compound = 0.005/1 to 0.5/1. By defining in such a range, the effect of the present invention can be further improved.

(2nd embodiment)

A second embodiment in which the synthetic fiber according to the present invention is embodied will be described. The synthetic fiber of the present embodiment is a synthetic fiber to which the treatment agent of the first embodiment is adhered. Specific examples of the synthetic fibers are not particularly limited, but for example (1) polyester fibers such as polyethylene terephthalate, polypropylene terephthalate, and polylactic acid ester, (2) polyamide fibers such as nylon 6 and nylon 66, (3) polyacrylic fibers such as polyacryl and modacrylic, and (4) polyolefin fibers such as polyethylene and polypropylene.

There is no particular limitation on the amount of the treatment agent (no solvent) of the first embodiment attached to the synthetic fiber, but it is preferable that the treatment agent of the first embodiment is applied in a ratio of 0.1 to 3% by mass relative to the synthetic fiber. Do. In addition, as a method of applying the treatment agent of the first embodiment, a known method 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 adopted. As a form when the treatment agent of the first embodiment is adhered to the synthetic fiber, for example, it may be applied as a low viscosity mineral oil diluent, an aqueous solution, or the like.

According to the treatment agent and synthetic fiber of the above embodiment, the following effects can be obtained.

The treatment agent of this embodiment contains a specific leveling agent, a nonionic surfactant, a specific ionic surfactant, and a specific hydroxy compound. And the leveling agent is at least one ester compound selected from an ester compound of a polyhydric alcohol and a monohydric carboxylic acid, and an ester compound of a monohydric alcohol and a polyhydric carboxylic acid. The ionic surfactant is a sulfonic acid compound (alkylsulfonate) having the structure of the above-described general formula (2). The hydroxy compound contains at least one hydroxy compound selected from polyhydric alcohols having 2 to 6 carbon atoms and at least one hydroxy compound selected from monohydric alcohols having 1 to 15 carbon atoms.

Therefore, in the spinning process of synthetic fibers, for example, tar contamination generated around the godet roller, dust contamination accumulated around the base, and fluff of the synthetic fiber yarn are effectively reduced, thereby exhibiting excellent good process passability. In addition, in the regular cleaning of the godet rollers that are performed when the spinning facility is stopped, by improving the cleaning properties of the tar accumulated on the rollers, the stopping time of the spinning facility is shortened, resulting in an improvement in production efficiency. .

In addition, the above embodiment may be changed as follows.

The treatment agent of the above embodiment may further contain components used in conventional treatment agents for synthetic fibers such as antioxidants and ultraviolet absorbers for maintaining the quality of the treatment agent within the range not impairing the effects of the present invention.

Example

Hereinafter, examples and the like are given in order to more specifically describe the configuration and effects of the present invention, but the present invention is not limited to these examples. In addition, in the description of Examples and Comparative Examples below, parts means parts by mass, and% means mass%.

Test Category 1 (Sulfonic acid compound)

Table 1 shows the contents of the sulfonic acid compounds (S-1, S-2 and rS-1) used in Examples and Comparative Examples this time. In Table 1, the values of a+b and the type of M ¹ in Chemical Formula 2 are shown.

In Table 1,

S-1 is an alkyl sulfonic acid sodium salt, and in the above-described Chemical Formula 2, a+b value of 5 to 17, M ¹ is sodium, a compound (mixture),

S-2 is an alkylsulfonic acid triethanolamine salt, a compound (mixture) in which the value of a+b is 5 to 17 and M ¹ is triethanolamine in Formula 2,

rS-1 is the sodium salt of dodecylbenzenesulfonic acid

Represents.

Test Category 2 (Preparation of treatment agent for synthetic fibers)

-Preparation of treatment agent for synthetic fibers (Example 1)

Trimethylolpropane trioleate (L-1) 50 parts, palm oil (L-3) 10 parts as a leveling agent, polyoxyethylene (EO5) sorbitan monooleate (N-1) as a nonionic surfactant 8 parts, polyoxyethylene (EO15) hydrogenated castor oil (N-2) 10 parts, polyoxyethylene (EO25) castor oil trilaurate (N-3) 10 parts, polyoxyethylene (EO20) hydrogenated castor oil Was crosslinked with maleic acid, and 5 parts of the compound (N-4) was blocked with stearic acid at the end, 0.8 parts of oleylphosphate dibutylethanolamine salt (I-1) as an ionic surfactant, and triethanolamine salt of alkylsulfonic acid (In the above-described formula (2), a+b value is 5 to 17, M ¹ is a triethanolamine compound (mixture)) (S-2) 5 parts, glycerin (PA-2) as a polyhydric alcohol of a hydroxy compound 1 part and 0.2 part of isopropyl alcohol (MA-2) as a monohydric alcohol were uniformly mixed to prepare a treatment agent for synthetic fibers of Example 1. Table 2 shows the types of leveling agents, nonionic surfactants, ionic surfactants, and hydroxy compounds, and the proportions of each component when the sum of the mixing ratios of each component is 100%.

Preparation of treatment agent for synthetic fibers (Example 2)

In the same procedure as the treatment agent for synthetic fibers of Example 1, the treatment agent for synthetic fibers of Example 2 was prepared. The details of the components in the treatment agent for synthetic fibers of Example 2 are as shown in Table 2. However, in addition to the raw materials shown in Table 2, pentaerythritol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate] as an antioxidant in a ratio of 0.5 parts to 100 parts of the treatment agent Was added.

Preparation of treatment agents for synthetic fibers (Examples 3 to 17 and Comparative Examples 1 to 7)

In the same procedure as the preparation of the treatment agent for synthetic fibers of Example 1, the treatment agents for synthetic fibers of Examples 3 to 17 and Comparative Examples 1 to 7 were prepared. The details of the components in each synthetic fiber treatment agent are as shown in Table 2.

In Table 2,

L-1: trimethylolpropane trioleate,

L-2: glycerin trioleate,

L-3: palm oil,

L-4: Dioleyl Adipate,

L-5: diisocetyl thiodipropionate,

rL-1: isotetracosyl oleate,

N-1: polyoxyethylene (EO5) sorbitan monooleate,

N-2: polyoxyethylene (EO15) hydrogenated castor oil,

N-3: polyoxyethylene (EO25) castor oil trilaurate,

N-4: a compound obtained by crosslinking polyoxyethylene (EO20) hydrogenated castor oil with maleic acid and blocking the terminal with stearic acid,

N-5: polyethylene glycol (MW 400) diolate,

N-6: polyoxyethylene (EO10) palm fatty acid ether,

I-1: oleylphosphate dibutylethanolamine salt,

I-2: isocetyl phosphate polyoxyethylene (EO4) lauryl amino ether salt,

I-3: polyoxyethylene (EO5) oleyl ether phosphate triethanolamine salt,

rI-1: sodium oleate salt,

PA-1: ethylene glycol,

PA-2: glycerin,

PA-3: diethylene glycol,

PA-4: propylene glycol,

PA-5: diglycerin,

rPA-1: 2-ethyl-1,3-hexanediol,

MA-1: methanol,

MA-2: isopropyl alcohol,

MA-3: ethanol,

MA-4: 2-ethylhexanol,

MA-5: ethylene glycol monobutyl ether,

MA-6: diethylene glycol monobutyl ether,

rMA-1: oleyl alcohol,

Represents.

In the column "*1" in Table 2, the content of the polyhydric alcohol in the hydroxy compound/the content of the sulfonic acid compound in the ionic surfactant (mass ratio), and in the column "*2", the content of the monohydric alcohol in the hydroxy compound/ It shows the content (mass ratio) of a sulfonic acid compound in an ionic surfactant.

Test Category 3 (Evaluation of process passability and production efficiency of treatment agents for synthetic fibers)

Each treatment agent prepared in Test Category 2 was uniformly diluted with ion-exchanged water as necessary to obtain a 15% solution. After drying the chips of polyethylene terephthalate according to the usual method, melt-spinning using an extruder, discharged from the detention center and cooled and solidified, the 15% solution was applied as a treatment agent for synthetic fibers to a running yarn bath of 0.5 mass. It was attached by roller lubrication so that it might become %. Thereafter, the obtained fibrous polyethylene terephthalate was bundled with a guide, and stretched so that the total draw ratio was 5.5 times through a 235°C drawing roll and a relaxation roll, and a drawn yarn of 1670 decitex 192 filaments was obtained as a 10 kg wound cheese.

·Evaluation of the amount of tar

As an evaluation of the amount of tar of the treatment agent, in the spinning step, contamination (the amount of tar) of the godet roller after spinning for 48 hours was evaluated according to the following criteria.

・Criteria for evaluating the amount of tar

◎ (Excellent): Pollution (tar) is not recognized or slightly recognized.

○ (Good): Some contamination (tar) is perceived.

X (poor): Contamination (tar) is clearly recognized, but the range of contamination (tar) adhesion is narrow.

XX (Very Poor): Contamination (tar) is clearly recognized, and the range of contamination (tar) attachment is wide.

・Evaluation of tar detergency

Godet roller contamination (tar) generated in the evaluation of the amount of tar was wiped off with a gauze impregnated with a 5% sodium hydroxide glycerin solution, and its cleanability was evaluated according to the following criteria.

・Criteria for evaluation of tar detergency

(Excellent): Contaminants (tar) can be wiped off by wiping less than 10 times.

○ (Good): By wiping more than 10 times and less than 50 times, dirt (tar) can be removed.

X (poor): By wiping more than 50 times and less than 100 times, dirt (tar) can be wiped off.

XX (very bad): Even by wiping more than 100 times, dirt (tar) cannot be removed.

・Evaluation of fluff

As a fluff evaluation of the treatment agent, in the spinning step described above, before winding the yarn as cheese, the number of fluffs per hour was measured with a fluff counting device (manufactured by Toray Engineering Co., Ltd.), and the following criteria were evaluated.

・Criteria for evaluating fluff

◎ (Excellent): The number of measured fluff is 0.

○ (Good): The number of measured fluffs is less than 2 (however, 0 is not included).

X (poor): The number of fluffs measured is 2 or more and less than 10.

XX (Very Poor): Measured number of fluffs is 10 or more.

・Evaluation of generation of hundred

As an evaluation of white powder generation of the treatment agent, in the spinning step described above, accumulation (contamination) of white powder on the ceiling plate of the winder device after spinning for 48 hours was evaluated as follows.

・Evaluation criteria for the generation of hundred

◎ (Excellent): The accumulation of percent is hardly recognized.

○ (Good): Some percentage accumulation is perceived.

X (poor): Percent accumulation is recognized.

XX (very poor): A large amount of percent accumulation is recognized.

As is also apparent from the results of Table 2, according to the present invention, in the yarn spinning process of synthetic fibers, tar contamination around the godet roller, white dust around the base, and lint are reduced, and the tar cleaning property around the godet roller is reduced. There is an effect that can be improved.

Claims (10)

A treatment agent for synthetic fibers comprising the following leveling agent, a nonionic surfactant, the following ionic surfactant, and the following hydroxy compound.
Leveling agent: At least one ester compound selected from an ester compound of a polyhydric alcohol and a monohydric carboxylic acid, and an ester compound of a monohydric alcohol and a polyhydric carboxylic acid.
Ionic surfactant: An ionic surfactant containing a sulfonic acid compound represented by the following formula (1).
[Formula 1]

(In Formula 1, a, b: an integer of 0 or more satisfying a+b = 5 to 17,
M ¹ : alkali metal, ammonium group, or organic amine group.)
Hydroxy compound: At least one hydroxy compound selected from polyhydric alcohols having 2 to 6 carbon atoms and at least one hydroxy compound selected from monohydric alcohols having 1 to 15 carbon atoms. The treatment agent for synthetic fibers according to claim 1, wherein the polyhydric alcohol in the hydroxy compound is at least one selected from ethylene glycol, propylene glycol, glycerin and diethylene glycol. The treatment agent for synthetic fibers according to claim 1 or 2, wherein the polyhydric alcohol in the hydroxy compound is at least one selected from ethylene glycol and glycerin. The method of claim 1 or 2, wherein the monohydric alcohol in the hydroxy compound is at least one selected from methanol, ethanol, isopropyl alcohol, 2-ethylhexanol, ethylene glycol monobutyl ether, and diethylene glycol monobutyl ether. Treatment agent for phosphorus synthetic fibers. The treatment agent for synthetic fibers according to claim 1 or 2, wherein the monohydric alcohol in the hydroxy compound is at least one selected from methanol and isopropyl alcohol. The mass ratio of the polyhydric alcohol in the hydroxy compound to the sulfonic acid compound in the ionic surfactant is content of the polyalcohol/content of the sulfonic acid compound = 0.01/1 to 4/1. Treatment agent for synthetic fibers. The mass ratio of the monohydric alcohol in the hydroxy compound to the sulfonic acid compound in the ionic surfactant according to claim 1 or 2, wherein the monohydric alcohol content/the sulfonic acid compound content = 0.005/1 to 0.5/ Treatment agent for single-person synthetic fibers. The treatment agent for synthetic fibers according to claim 1 or 2, further comprising a phosphoric acid ester compound as an ionic surfactant. The leveling agent according to claim 1 or 2, wherein when the sum of the content ratios of the leveling agent, the nonionic surfactant, the ionic surfactant, and the hydroxy compound is 100% by mass, the leveling agent is 30 to 70% by mass. And 20 to 60 mass% of the nonionic surfactant, 0.1 to 20 mass% of the ionic surfactant, and 0.001 to 5 mass% of the hydroxy compound. A synthetic fiber comprising the treatment agent for synthetic fibers according to claim 1 or 2 attached thereto.