JP2019007125A - Treatment agent for synthetic fiber and synthetic fiber - Google Patents

Abstract

To provide a treatment agent for synthetic fiber excellent in adhesive property to an oil supply roller, and capable of reducing friction with each roller passed during drawing, and suppressing generation of fuzz.SOLUTION: There is provided a treatment agent for synthetic fiber containing ester (A) constituted by tri- or higher valent alcohol (a) and aliphatic acid (c), ester (B) constituted by alcohol (b) and aliphatic acid (d), an ethylene oxide addition product of monovalent alcohol (C), and a phosphoric acid ester metal salt (D), in which the alcohol (b) is at least one kind of alcohol selected from a group consisting of monovalent alcohol (b1) and bivalent alcohol (b2), a weight ratio of the ester (A) and the ester (B), [(A)/(B)] is 10/90 to 95/5, and HLB of the ethylene oxide addition product (C) is 4.0 to 9.0.SELECTED DRAWING: None

Description

  The present invention relates to a treatment agent for synthetic fibers (hereinafter sometimes abbreviated as a treatment agent) and synthetic fibers.

Conventionally, various treatment agents have been used depending on the purpose in order to smoothly carry out the spinning and drawing processes of fibers for industrial materials. In recent years, in order to improve productivity and quality, spinning and stretching speeds have been increased and heating elements such as stretching rollers have been increasingly heated. Since spinning is performed under such severe conditions, fluff and the like are likely to occur in the spinning and drawing processes.
Then, the technique which reduces generation | occurrence | production of a fluff is known by using the processing agent for synthetic fibers containing a polyhydric alcohol thioester type compound (patent document 1).

Japanese Patent Laid-Open No. 5-263361

However, the conventional synthetic fiber treatment agent has a problem that the generation of fluff cannot be sufficiently reduced under the above severe conditions. In addition, the adhesion of the synthetic fiber treatment agent to the oil supply roller is also insufficient, and as a result, the synthetic fiber treatment agent adheres unevenly to the fibers, which reduces the physical properties of the product using synthetic fibers. There is.
An object of this invention is to provide the processing agent for synthetic fibers which is excellent in the adhesiveness to an oil supply roller, and can suppress generation | occurrence | production of a fluff by reducing the friction with each roller which passes at the time of extending | stretching.

The inventors of the present invention have reached the present invention as a result of studies to achieve the above object.
That is, the present invention provides an ester (A) composed of a trihydric or higher polyhydric alcohol (a) and a fatty acid (c), and an ester (B) composed of an alcohol (b) and a fatty acid (d). And a synthetic fiber treating agent containing an ethylene oxide adduct of monohydric alcohol (C) and a phosphate metal salt (D),
The alcohol (b) is at least one alcohol selected from the group consisting of a monohydric alcohol (b1) and a dihydric alcohol (b2);
The weight ratio [(A) / (B)] of the ester (A) and the ester (B) is 10/90 to 95/5,
A synthetic fiber treatment agent having an HLB of the ethylene oxide adduct (C) of 4.0 to 9.0; a synthetic fiber containing the synthetic fiber treatment agent, wherein the synthetic fiber treatment agent has a weight ratio. Is a synthetic fiber of 0.1 to 3.0% by weight based on the weight of the synthetic fiber.

  The treatment agent for synthetic fibers of the present invention is excellent in adhesion to an oil supply roller, and has an effect that friction at each roller passing during stretching can be reduced.

The synthetic fiber treating agent of the present invention is composed of an ester (A) composed of a trihydric or higher polyhydric alcohol (a) and a fatty acid (c), an alcohol (b) and a fatty acid (d). A treating agent for synthetic fibers containing an ester (B), an ethylene oxide adduct (C) of a monohydric alcohol, and a phosphate ester metal salt (D).
The alcohol (b) is at least one alcohol selected from the group consisting of a monohydric alcohol (b1) and a dihydric alcohol (b2), and the weight ratio of the ester (A) to the ester (B) [( A) / (B)] is 10/90 to 95/5, and the HLB of the ethylene oxide adduct (C) is 4.0 to 9.0.

  As described above, the ester (A) in the present invention is composed of a trihydric or higher polyhydric alcohol (a) and a fatty acid (c). The ester (A) does not need to have all the hydroxyl groups of the alcohol (a) reacted with the fatty acid (c), and the ester (A) may be a partial ester.

Examples of the trihydric or higher polyhydric alcohol (a) constituting the ester (A) include polyhydric alcohols having 3 to 20 carbon atoms, specifically, glycerin, trimethylolpropane, pentaerythritol, sorbitol and sorbitan. Etc.
Of these, trimethylolpropane and pentaerythritol are preferred from the viewpoint of friction reduction.

  The fatty acid (c) constituting the ester (A) includes aliphatic monocarboxylic acids having 8 to 24 carbon atoms [saturated aliphatic monocarboxylic acids (such as lauric acid, palmitic acid, stearic acid, isostearic acid and isoarachidic acid) and Unsaturated aliphatic monocarboxylic acids (such as oleic acid and erucic acid) and the like].

  The ester (A) can be produced by a method such as carrying out an esterification reaction by a known method using the alcohol (a) and the fatty acid (c). In the esterification reaction, a catalyst (such as paratoluenesulfonic acid) may be used.

  As described above, the ester (B) of the present invention is composed of an alcohol (b) and a fatty acid (d). In the ester (B), it is not necessary that all the hydroxyl groups of the alcohol (b) are reacted with the fatty acid (d), and the ester (B) may be a partial ester.

The alcohol (b) is at least one alcohol selected from the group consisting of a monohydric alcohol (b1) and a dihydric alcohol (b2).
The alcohol (b) needs to be a monohydric alcohol (b1) and / or a dihydric alcohol (b2) in order to lower the frictional tension at 20 ° C., preferably a monohydric alcohol (b1). ).

  Examples of the monohydric alcohol (b1) include methanol, ethanol, linear or branched monoalcohols having 3 to 10 carbon atoms {propanol, butanol, octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, etc.}, 11 to 11 carbon atoms. 32 saturated or unsaturated linear or branched monoalcohols {lauryl alcohol, tridecyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol and behenyl alcohol, etc.}, and ethylene oxide adducts of these alcohols ( 1-20 mol is preferably added per 1 mol of alcohol).

  Examples of the dihydric alcohol (b2) include chain aliphatic alcohols having 1 to 20 carbon atoms (such as 1,6-hexanediol and neopentyl glycol), and alicyclic alcohols having 3 to 20 carbon atoms (such as cyclohexanediol). ) And ethylene oxide adducts of these alcohols (preferably 1 to 20 moles are added per mole of alcohol).

The fatty acid (d) constituting the ester (B) is an aliphatic monocarboxylic acid having 8 to 24 carbon atoms [saturated aliphatic monocarboxylic acid (such as lauric acid, palmitic acid, stearic acid, isostearic acid and isoarachidic acid), Unsaturated aliphatic monocarboxylic acids (such as oleic acid and erucic acid)] and aliphatic dicarboxylic acids having 4 to 24 carbon atoms [saturated aliphatic dicarboxylic acids (adipic acid) and unsaturated aliphatic dicarboxylic acids (such as elaidic acid)] ] Etc. are mentioned.
The fatty acid (d) may be a fatty acid in which a carbon atom in an aliphatic group is substituted with a sulfur atom. Examples of the fatty acid having such a sulfur atom include thiodipropionic acid and thiodihexanoic acid. Can be mentioned.

  The ester (B) can be produced by a method such as performing an esterification reaction by a known method using the alcohol (b) and the fatty acid (d). In the esterification reaction, a catalyst (such as paratoluenesulfonic acid) may be used.

The ethylene oxide adduct (C) of monohydric alcohol in the present invention has an HLB of 4.0 to 9.0 from the viewpoint of improving the adhesion to the oil supply roller. Preferably it is 5.0-9.0, More preferably, it is 6.0-9.0.
The “HLB” in the present invention is an index indicating a balance between hydrophilicity and lipophilicity, and is described, for example, in “Introduction to Surfactants” (published by Sanyo Chemical Industries, Ltd., 2007, Takehiko Fujimoto), page 212. It is known as a calculated value by the Oda method, and is not a calculated value by the Griffin method.
The HLB value can be calculated from the ratio between the organic value and the inorganic value of the organic compound.
HLB = 10 × inorganic / organic The organic value and the inorganic value for deriving HLB can be calculated using the values in the table described in the above “Introduction to Surfactant” page 213.

  The monohydric alcohol constituting the ethylene oxide adduct (C) of monohydric alcohol is methanol, ethanol, linear or branched monoalcohol having 3 to 10 carbon atoms {propanol, butanol, octyl alcohol, 2-ethylhexyl alcohol and decyl. Alcohol, etc., and a saturated or unsaturated linear or branched monoalcohol having 11 to 32 carbon atoms {lauryl alcohol, tridecyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, behenyl alcohol, etc.} Can be mentioned.

  The amount of ethylene oxide added to the monohydric alcohol is preferably 1 to 10 moles per mole of monohydric alcohol.

  The ethylene oxide adduct (C) can be produced by adding ethylene oxide to a monohydric alcohol by a known method.

The processing agent for synthetic fibers of the present invention further contains a phosphate ester metal salt (D) from the viewpoint of improving adhesion to an oiling roller.
The phosphoric acid ester metal salt (D) is a monoalkyl phosphate metal (alkali metal, alkaline earth metal and transition metal) salt and dialkyl phosphate metal (alkali metal, alkaline earth metal and transition metal). Metal etc.) and salts.

  As said monoalkyl phosphoric acid and dialkyl phosphoric acid, phosphoric acid and said alcohol (b1) [A primary alcohol is preferable among alcohol (b1), and a C1-C32 primary alcohol is preferable.] And esterified products.

  The phosphate metal salt (D) is a mixture of a monoalkyl phosphate ester, a dialkyl phosphate ester and a by-product obtained by esterification of the alcohol (b1) and phosphoric acid (anhydrous phosphoric acid). It can be produced by a method of neutralizing with an alkali metal hydroxide (such as potassium hydroxide and sodium hydroxide).

The processing agent for synthetic fibers of the present invention may further contain other additives (E) in addition to (A) to (D) as long as the performance is not impaired.
As other additives (E), an alkylene oxide adduct of a fat and oil having a hydroxy group (such as a 5-50 mol adduct of castor oil or hydrogenated castor oil), a pH adjuster [metal alkali (sodium hydroxide and Potassium hydroxide, etc.), organic amines (alkylamines and alkylamine alkylene oxide adducts, etc.), organic acids (oleic acid, etc.)], antistatic agents (fatty acid soaps, etc.), surface conditioners (polydimethylsiloxane and alkyl) Modified silicones, etc.), ultraviolet absorbers, antioxidants [hindered phenolic antioxidants (Irganox 245, Irganox 565, etc.), etc.], viscosity modifiers, appearance modifiers, and the like.

It is preferable that the weight ratio of ester (A) which the processing agent for synthetic fibers of this invention contains is 5 to 65 weight% based on the weight of the processing agent for synthetic fibers.
It is preferable that the weight ratio of ester (B) which the processing agent for synthetic fibers of this invention contains is 5 to 60 weight% based on the weight of the processing agent for synthetic fibers.
The weight ratio of the ethylene oxide adduct (C) contained in the synthetic fiber treatment agent of the present invention is preferably 1 to 20% by weight, based on the weight of the synthetic fiber treatment agent, and 2 to 20% by weight. More preferably.
The weight ratio of the phosphate ester metal salt (D) contained in the synthetic fiber treatment agent of the present invention is preferably 0.01 to 1.5% by weight based on the weight of the synthetic fiber treatment agent, More preferably, it is 0.1 to 1.5% by weight.
It is preferable that the weight ratio of the other additive (E) which the processing agent for synthetic fibers of this invention contains is 10 to 40 weight% based on the weight of the processing agent for synthetic fibers.

In the synthetic fiber treating agent of the present invention, the weight ratio [(A) / (B)] of the ester (A) and the ester (B) is 10/90 to 95/5 as described above.
If it is less than 10/90, the friction between the fiber and the metal at a high temperature roller (for example, 240 ° C.) increases, and if it exceeds 95/5, the friction between the fiber and the metal at a room temperature roller (for example, 20 ° C.) increases. Become.

  In the synthetic fiber treating agent of the present invention, the weight ratio [(C) / (D)] of the ethylene oxide adduct (C) and the phosphate ester metal salt (D) is from the viewpoint of adhesion to the oiling roller. 60/40 to 99/1.

The synthetic fiber of this invention contains the processing agent for synthetic fibers of this invention.
The synthetic fiber of the present invention can be obtained by attaching the synthetic fiber treatment agent of the present invention to the synthetic fiber before treatment with the synthetic fiber treatment agent.
The synthetic fiber of this invention is 0.1-3. Based on the weight (synthetic fiber after processing with the processing agent for synthetic fibers of this invention) of the processing agent for synthetic fibers of this invention of the synthetic fiber of this invention. It is preferable to contain 0% by weight.
Synthetic fibers to be treated with the synthetic fiber treating agent of the present invention include nylon fibers for airbags, nylon fibers for tire cords, polyester fibers for airbags, polyester fibers for tire cords, polyester fibers for seat belts, and the like. Is mentioned.

  As a method for adhering the synthetic fiber treatment agent to the synthetic fiber, a known method or the like can be used. An emulsion containing the synthetic fiber treatment agent of the present invention, a roller or a guide oiling device, etc. , A stretching method or a method of attaching before winding.

In the above method, examples of the emulsion containing the synthetic fiber treatment agent of the present invention include a mixture of the synthetic fiber treatment agent of the present invention and water.
In the emulsion, the content of the treating agent for synthetic fibers of the present invention is preferably 10 to 30% by weight based on the weight of the emulsion.

The synthetic fiber treatment agent of the present invention has excellent friction characteristics with low friction between fiber and metal at the time of treating fibers at both normal temperature and high temperature.
Moreover, since the synthetic fiber of the present invention treated with the synthetic fiber treating agent of the present invention has good adhesion to the oiling roller, the uniform adhesion to the fiber is also good, and the product using the synthetic fiber It can suppress that a physical property falls.
For this reason, the synthetic fiber treatment agent of the present invention can be suitably used as a treatment agent for spinning fibers for industrial materials.

  Hereinafter, although an example and a comparative example explain the present invention further, the present invention is not limited to these. Hereinafter, unless otherwise specified, “%” represents “% by weight” and “parts” represents “parts by weight”.

Production Example 1: Production of (A1-1) Trimethylolpropane: lauric acid = 1: 3 molar ratio as a catalyst, paratoluenesulfonic acid (0.3% by weight based on the total weight of trimethylolpropane and lauric acid) ) Was used for esterification at 160 ° C. to obtain trimethylolpropane trilaurate (A1-1).

Production Example 2: Production of (A1-2) Pentaerythritol: lauric acid = 1: 4, p-toluenesulfonic acid (0.3% by weight based on the total weight of pentaerythritol and lauric acid) as a catalyst And an esterification reaction was performed at 160 ° C. to obtain pentaerythritol tetralaurate (A1-2).

Production Example 3: Production of (B1-1) 2-decyltetradecanol: oleic acid = 1: 1 molar ratio as a catalyst with respect to the total weight of paratoluenesulfonic acid (2-decyltetradecanol and oleic acid) 0.3 wt%) was used for esterification at 160 ° C. to obtain 2-decyltetradecyl oleate (B1-1).

Production Example 4: Production of (B2-1) In a molar ratio of lauryl alcohol EO3 molar adduct: adipic acid = 2: 1, as a catalyst, with respect to the total weight of paratoluenesulfonic acid (lauryl alcohol EO3 molar adduct and adipic acid) 0.3 wt%) was used for esterification at 160 ° C. to obtain dilauryl alcohol EO 3 mol adduct adipate (B2-1).

Production Example 5: Production of (B2-2) Lauryl alcohol EO3 molar adduct: thiodipropionic acid = 2: 1 molar ratio of paratoluenesulfonic acid (lauryl alcohol EO3 molar adduct and thiodipropionic acid Was used at 160 ° C. to obtain dilauryl alcohol EO 3 mol adduct thiodipropionate (B2-2).

Production Example 6: Production of (C-1) Alcohol having 14 and 15 carbon atoms (C14-15) [trade name: Neodol 45, manufactured by Shell Japan Co., Ltd., a mixture of 14 alcohols and 15 carbon atoms (Weight of alcohol having 14 carbons: weight of alcohol having 15 carbons = 48: 52)]: ethylene hydroxide = 1: 2 molar ratio, potassium hydroxide (total weight of C14-15 alcohol and ethylene oxide) as a catalyst Was used at 160 ° C. to obtain a C14-15 alcohol EO2 molar adduct (C-1). This HLB is 6.8.

Production Example 7: Production of (C-2) C14-15 alcohol (trade name: Neodol 45): ethylene oxide = 1: 3.7 molar ratio of potassium hydroxide (C14-15 alcohol and ethylene oxide as catalyst) The pressure reaction was carried out at 160 ° C. using 0.1% by weight based on the total weight to obtain a C14-15 alcohol EO 3.7 mol adduct (C-2). This HLB is 8.6.

Comparative Production Example 1: Production of (C′-1) C14-15 alcohol (trade name: Neodol 45): ethylene oxide = 1: 4.3 molar ratio potassium hydroxide (C14-15 alcohol and ethylene as catalyst) The pressure reaction was carried out at 160 ° C. using 0.1% by weight based on the total weight of oxides to obtain a C14-15 alcohol EO 4.3 mol adduct (C′-1). This HLB is 9.2 and is used for Comparative Example 6.

Production Example 8: Production of (D-1) Oleyl alcohol: phosphoric anhydride (phosphorous tetraoxide) = 3: 0.5 at a molar ratio of 60.degree. C. to give monooleyl phosphate and dioleyl phosphorus. After obtaining an acid mixture, the mixture was neutralized with an aqueous potassium hydroxide solution, and an aqueous solution of oleyl phosphate ester potassium salt [mixture of monooleyl phosphate dipotassium salt and dioleyl phosphate potassium salt] (D-1) (solid content) Weight ratio: 25% by weight).

Production Example 9: Production of (E-1) Hardened castor oil: ethylene oxide = 1: 10 molar ratio of potassium hydroxide (0.1% by weight based on the total weight of the hardened castor oil and ethylene oxide) was used as a catalyst. Then, a pressure reaction was performed at 160 ° C. to obtain a hardened castor oil EO 10 mol adduct (E-1).

Production Example 10: Production of (E-2) Cured castor oil: ethylene oxide = 1: 25 molar ratio, and potassium hydroxide (0.1 wt% based on the total weight of the cured castor oil and ethylene oxide) was used as a catalyst. Then, a pressure reaction was performed at 160 ° C. to obtain a cured castor oil EO 25 mol adduct (E-2).

Production Example 11: Production of (E-4) Tallow alkylamine: ethylene oxide = 1: 15 molar ratio, potassium hydroxide as catalyst (0.1% by weight based on the total weight of tallow alkylamine and ethylene oxide) Was used to perform a pressure reaction at 160 ° C. to obtain beef tallow alkylamine EO 15 mol adduct (E-4).

Production Example 12: Production of (E-6) Dodecenyl succinic anhydride is neutralized with an aqueous potassium hydroxide solution to obtain an aqueous solution of dodecenyl succinic acid dipotassium salt (E-6) (weight ratio of solid content: 30% by weight). It was.

Example 1
Trimethylolpropane trilaurate (A1-1), dilauryl alcohol EO3 mol adduct adipate (B2-1), dilauryl alcohol EO3 mol adduct thiodipropionate (B2-2), EO3 of C14-15 alcohol. 7 mol adduct (C-2), aqueous solution of oleyl phosphate ester potassium salt (D-1), hardened castor oil EO 10 mol adduct (E-1), polyether-modified silicone (“KF manufactured by Shin-Etsu Chemical Co., Ltd.) -945 ") (E-3), EO 15 mol adduct of tallow alkylamine (E-4), Irganox 1010 (manufactured by BASF) (E-5), aqueous solution of dodecenyl succinic acid dipotassium salt (E-6) Were mixed and homogenized at 70 to 90 ° C. for 1 hour to obtain the treatment agent of Example 1.

Examples 2-9 and Comparative Examples 1-7
Each component was mix | blended like Example 1 by the mixing | blending prescription of Table 1, and the processing agent of Examples 2-9 and Comparative Examples 1-7 was prepared.

In addition, each component in Table 1 is as follows.
(A1-1): trimethylolpropane trilaurate (A1-2): pentaerythritol tetralaurate (B1-1): 2-decyltetradecylolate (B2-1): dilauryl alcohol EO3 molar adduct adipate ( B2-2): Dilauryl alcohol EO3 mol adduct thiodipropionate (C-1): C14-15 alcohol EO2 mol adduct (HLB = 6.8)
(C-2): C14-15 alcohol EO 3.7 mol adduct (HLB = 8.6)
(C′-1): C14-15 alcohol EO 4.3 mol adduct (HLB = 9.2)
(D-1): oleyl phosphate ester potassium salt (the number of parts listed in Table 1 is the weight of solids)
(E-1): Cured castor oil EO 10 mol adduct (E-2): Cured castor oil EO 25 mol adduct (E-3): Polyether-modified silicone (“KF-945” manufactured by Shin-Etsu Chemical Co., Ltd.)
(E-4): tallow alkylamine EO 15 mol adduct (E-5): pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] ("Irganox 1010" manufactured by BASF) )
(E-6): Dodecenyl succinic acid dipotassium salt (the number of blends shown in Table 1 is the weight of solids)

  Using the treatment agents of Examples 1 to 9 and Comparative Examples 1 to 7 described in Table 1, the film thickness of the emulsion and the friction tension between the fiber and metal (20 ° C., 240 ° C.) were evaluated.

  The method for evaluating the film thickness of the emulsion of the treating agent and the method for evaluating the frictional tension between the fiber and the metal are as follows.

<Emulsion film thickness evaluation>
(1) The prepared treating agent was added to water so as to have a concentration of 20% and emulsified to prepare an emulsion.
(2) The prepared emulsion W ₁ (g) was put in a petri dish, and a disk-shaped ceramic roller having a diameter of 13.3 cm and a thickness of 6.5 cm was immersed so that the depth from the liquid surface was 1 cm.
(3) The roller was removed after rotating at a rotational speed of 14 rpm for 1 minute, and the weight W ₂ (g) of the emulsion remaining in the petri dish was measured to calculate the amount of adhesion to the roller (W ₁ -W ₂ ). The emulsion film thickness (t) was calculated by the following formula (1).
t (μm) = (W ₁ −W ₂ ) / (S × d) × 10,000 (1)
If the film thickness of the emulsion measured under these conditions is 95 μm or more, when the emulsion is attached to the fiber with the oiling roller, the entire surface of the single yarn is immersed in the emulsion, so that the treatment agent can be uniformly attached. As a result, uniform adhesion to the fiber is improved.
In the above formula (1), S is a value obtained by multiplying the circumference (cm) of the oil supply roller by the lateral width (cm) of the oil supply roller. D is the density of the emulsion used in the test (g / cm ³ ).

<Fiber-metal frictional tension evaluation>
(1) The prepared treating agent was added to water so as to have a concentration of 2% and emulsified to prepare an emulsion.
(2) A polyester seat belt yarn (1000 denier / 72 filament), which is a commercially available synthetic fiber, is immersed in the emulsion prepared in (1) and left to stand for 5 minutes. The test yarn was squeezed to 1.25 times the weight of the yarn, dried in a dryer at 60 ° C. to remove water, and the treatment agent was adhered to the test yarn [treatment agent (pure Min) was 0.5%].
(3) The initial load of 1000 g is applied to a friction body (surface satin chrome plating, diameter 5 cm) having a surface temperature of 20 ° C. using a TORAY friction tester under the conditions of a temperature of 20 ° C. and a humidity of 40%. They were contacted at a yarn speed of 0.5 m / min and a contact angle of 180 °, and the frictional tension (g) at 20 ° C. was measured.
(4) Furthermore, after raising the temperature of the friction body to 240 ° C., the friction tension (g) was measured.

  The lower the value of the friction tension, the lower the friction on the stretching roller. In the case of the treatment agent of the present invention, in this evaluation condition, when the surface temperature is 20 ° C., the friction body is 1600 g or less and 240 ° C. In the case of a friction body, 1400 g or less is preferable.

All of the treatment agents of Examples 1 to 9 of the present invention have an emulsion film thickness of 95 μm or more and excellent uniform adhesion to fibers, and the fiber-metal frictional tension at 20 ° C. is 1600 g or less, and 240 ° C. is 1400 g or less. The friction on the roller is low enough.
On the other hand, Comparative Example 1 not including (A) and Comparative Example 3 in which (A) / (B) is less than 10/90 by weight ratio have a fiber-metal frictional tension at 240 ° C. exceeding 1400 g, High friction on the roller.
Further, Comparative Example 2 not including (B) and Comparative Example 4 in which (A) / (B) exceeds 95/5 by weight ratio indicate that the fiber-metal frictional tension at 20 ° C. exceeds 1600 g. High friction on the top.
Moreover, the comparative example 5 which does not contain (C), the comparative example 6 which used (C'-1) where HLB exceeds 9, and the comparative example 7 which does not contain (D) have an emulsion film thickness of less than 95 micrometers. Therefore, the uniform adhesion to the fiber is poor.

The synthetic fiber treatment agent of the present invention has low friction between fiber and metal both at normal temperature and high temperature, and is excellent in friction characteristics.
Moreover, since the synthetic fiber of this invention processed with the synthetic fiber processing agent of this invention has favorable uniform adhesiveness to a fiber, it can suppress that the physical property of the product using a synthetic fiber falls.
For this reason, the synthetic fiber treatment agent of the present invention can be suitably used as a treatment agent for spinning fibers for industrial materials.

Claims (4)

An ester (A) composed of a trihydric or higher polyhydric alcohol (a) and a fatty acid (c), an ester (B) composed of an alcohol (b) and a fatty acid (d), and a monohydric alcohol A treating agent for synthetic fibers containing an ethylene oxide adduct (C) and a phosphate ester metal salt (D),
The alcohol (b) is at least one alcohol selected from the group consisting of a monohydric alcohol (b1) and a dihydric alcohol (b2);
The weight ratio [(A) / (B)] of the ester (A) and the ester (B) is 10/90 to 95/5,
The processing agent for synthetic fibers whose HLB of the said ethylene oxide adduct (C) is 4.0-9.0.   The processing agent for synthetic fibers according to claim 1, wherein the alcohol (a) is at least one selected from the group consisting of trimethylolpropane, pentaerythritol, sorbitan and glycerin.   The synthesis according to claim 1 or 2, wherein a weight ratio [(C) / (D)] of the ethylene oxide adduct (C) and the phosphate metal salt (D) is 60/40 to 99/1. Fiber treatment agent. It is a synthetic fiber containing the processing agent for synthetic fibers according to any one of claims 1 to 3, wherein the weight ratio of the processing agent for synthetic fibers is 0.1 based on the weight of the synthetic fiber. Synthetic fiber that is ~ 3.0 wt%.