TW201534784A - Synthetic fiber treating agent and use thereof - Google Patents

Abstract

An objective of this invention is to provide a synthetic fiber treating agent which can suppress formation of floss and yarn breaking, and excellent in thermal resistance, and dot not cause the deterioration of work environment. Provided is a Synthetic fiber treating agent comprising: an ester (A) comprising a structure of ester bonding formed of polyol and linear fatty acid, and a non-ionic surfactant (B), wherein, the linear fatty acid comprises a linoleic acid and a linear fatty acid having a carbon number of 14 to 22 other than the linoleic acid. With respect to all of the linear fatty acid, the ratio of the linoleic acid is 5 to 20 wt%, the total weight ratio of the linoleic acid and the linear fatty acid having a carbon number of 14 to 22 other than the linoleic acid is 95 wt% or more, and the weight ratio of linolenic acid is 2 wt% or less.

Description

Synthetic fiber treatment agent and its utilization

The present invention relates to a treating agent for synthetic fibers and use thereof. More specifically, it relates to a treatment agent for synthetic fibers which can reduce fluff and yarn breakage used in the production of synthetic fibers, a synthetic fiber filament yarn to which the treatment agent is imparted, and a synthetic fiber using the treatment agent. A method for producing a filament yarn, and a fiber structure comprising a synthetic fiber filament yarn obtained by the production method.

In recent years, high-functionality such as multi-fiber multifilament of a synthetic fiber, a cross-section of a profile, a high strength, and a low shrinkage rate have been underway. Further, in the production of synthetic fibers, in order to improve production efficiency, the production speed is increased and the heat treatment is increased. The increase in production speed is accompanied by an increase in damage to synthetic fibers, an increase in fluff and yarn breakage. In addition, as for the high temperature of the heat treatment, it is possible to increase the temperature of the heat setting roll which is insufficient in heat history of the synthetic fiber and which is used for high strength, such as high strength. The increase in the temperature of the heat-setting roll causes an increase in contamination of the heat-setting roll due to thermal deterioration of the treatment agent for synthetic resin, and causes a deterioration in the production environment and a decrease in productivity.

In order to solve these problems, the following prior art has been proposed. For example, in Patent Document 1, in order to reduce fluff and yarn breakage, a treatment agent excellent in lubricity of thiodipropionate has been proposed. The treatment agent using thiodipropionate has low friction between fiber-metal and fiber-fiber, and heat resistance is also better than that of the conventional lubricant, and can reduce fluff and yarn breakage. However, in recent years, with the increase in the temperature of the heat setting rolls, not only the increase in smoke, the deterioration of the working environment, but also the contamination of the rolls has increased, and it is necessary to frequently perform roll cleaning, and it is difficult to obtain high-quality fibers.

Further, in Patent Document 2, in order to improve the contamination of the heat setting roll, a treatment agent for a fatty acid ester of an alkylene oxide adduct of bisphenol A has been proposed. The treatment agent of the fatty acid ester using the alkylene oxide adduct of bisphenol A is excellent in heat resistance, but the friction between the fiber-metal and the fiber-fiber is large, and the lubricity as a necessary property of the treatment agent for synthetic fibers is inferior. As a result, the fiber damage is increased in the fiber manufacturing step and the processing step, and the pile and the yarn breakage are increased, which cannot meet the high requirements for fibers today.

Further, in Patent Document 3, in order to reduce the amount of tar accumulated on the stretching rolls and to reduce fluff and yarn breakage, it has been proposed to use a divalent acid ester of a dibasic acid, an antioxidant, or the like, and an iodine having a iodine value of 4 or less. Treatment agent. However, although the treatment agent for fibers of Patent Document 3 has an effect of preventing accumulation of tar, the molecular weight of the ester is small, so that the protection of the fiber is insufficient, and conversely, there is a problem that the pile is increased.

As described above, the conventional synthetic fiber treating agent cannot cope with these problems, and there is an urgent demand for synthetic fibers which can produce high-functionalized fibers in recent years with high quality and excellent heat resistance without deteriorating the production environment. Use a treatment agent.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Laid-Open Patent Publication No. 54-147214

Patent Document 2: Japanese Patent Publication No. Sho 47-29474

Patent Document 3: Japanese Laid-Open Patent Publication No. 2009-235647

An object of the present invention is to provide a treatment agent for synthetic fibers, a synthetic fiber filament yarn to which the treatment agent is applied, a method for producing a synthetic fiber filament yarn using the treatment agent, and a synthetic fiber filament obtained by the production method. In the fiber structure of the yarn, the synthetic fiber is used in the production of synthetic fibers by a treating agent, and the occurrence of fluff and yarn breakage can be remarkably reduced, and the heat resistance is excellent, and the production environment is not deteriorated.

The present inventors have conducted intensive studies to solve the above problems, and as a result, it has been found that when a treating agent for synthetic fibers containing a specific ester (A) and a nonionic surfactant is used, the generation of fluff and yarn breakage can be remarkably reduced, which is remarkable. Improve the quality of the yarn and obtain excellent yarn-making properties. Further, it has been found that the treatment agent for synthetic fibers is reduced in roll contamination due to tar during heat treatment, and does not deteriorate the production environment.

That is, the treating agent for synthetic fibers of the present invention needs to contain an ester (A) having a structure in which an ester bond is formed between a polyhydric alcohol and a linear fatty acid, and a nonionic surfactant (B); wherein the aforementioned linear fatty acid comprises linoleic acid and a linear fatty acid having 14 to 22 carbon atoms other than linoleic acid, among all linear fatty acids, linoleic acid The ratio is 5 to 20% by weight, and the total weight ratio of linoleic acid and linear fatty acids having 14 to 22 carbon atoms other than linoleic acid is 95% by weight or more, and the secondary linoleic acid The weight ratio is 2% by weight or less.

The iodine value of the aforementioned ester (A) is preferably from 30 to 80.

In the nonvolatile component of the treating agent, the weight ratio of the ester (A) is preferably from 10 to 70% by weight, and the weight ratio of the nonionic surfactant (B) is from 15 to 65% by weight.

The aforementioned polyol is preferably a triol.

The weight average molecular weight of the aforementioned ester (A) is preferably from 500 to 1200.

Preferably, the nonionic surfactant (B) comprises at least one selected from the group consisting of a polyhydroxyalkylene-containing hydroxy fatty acid polyol ester and an ester in which at least one hydroxyl group of the polyol ester is blocked with a fatty acid. A nonionic surfactant (B1).

The weight ratio of the aforementioned nonionic surfactant (B1) to the aforementioned nonionic surfactant (B) is preferably from 5 to 95% by weight.

The synthetic fiber filament yarn of the present invention is obtained by applying the above-mentioned treating agent to the raw synthetic fiber filament yarn.

The method for producing a synthetic fiber filament yarn of the present invention comprises the step of imparting the above-mentioned treating agent to the raw material synthetic fiber filament yarn.

The fiber structure of the present invention comprises a synthetic fiber filament yarn obtained by the synthetic fiber filament yarn of the present invention and/or the production method of the present invention.

When the synthetic fiber is produced by using the treating agent for synthetic fibers of the present invention, the occurrence of fluff and yarn breakage can be remarkably reduced. Further, the treating agent for synthetic fibers of the present invention is excellent in heat resistance and does not deteriorate the production environment.

According to the production method of the present invention, it is possible to significantly reduce the occurrence of fluff and yarn breakage, and it is possible to produce a synthetic fiber filament yarn excellent in yarn quality. In addition, it is possible to obtain a raw yarn having a small amount of tar and high quality. The synthetic fiber filament yarn of the present invention has less occurrence of fluff and yarn breakage, and is excellent in yarn quality.

The fiber structure of the present invention is excellent in quality because it uses a high-quality raw yarn.

The treating agent for synthetic fibers of the present invention needs to contain a specific ester (A) and a nonionic surfactant (B). The details will be described below.

[Ester (A)]

The ester (A) is an essential component of the treating agent of the present invention, and is an ester having a structure in which an ester bond is formed between a polyol and a linear fatty acid. When it is necessary to use only an ester having a structure in which an ester bond is formed of a monohydric alcohol and a linear fatty acid, the ester (A) is used, although the smoothness is excellent, the oil film strength of the protective fiber is weak, and the pile is increased. Further, when an ester having a structure in which an ester bond is formed from a polyol and a branched fatty acid is used, smoothness is insufficient and fluff is increased. The ester (A) may be used singly or in combination of two or more. Further, the ester (A) is a compound having no polyoxyalkylene group in the molecule.

The linear fatty acid constituting the ester (A) means that the carbon skeleton is linear Structure of an aliphatic monocarboxylic acid. Although the linear fatty acid may contain a hydroxy fatty acid, if the hydroxy fatty acid is contained, the treating agent has insufficient effect as a smoothing agent, and therefore it is preferred that the hydroxy fatty acid is not contained.

The linear fatty acid constituting the ester (A) includes linoleic acid and a linear fatty acid having 14 to 22 carbon atoms (hereinafter referred to as a linear fatty acid (a)) other than linoleic acid, among all linear fatty acids. The ratio of linoleic acid is 5 to 20% by weight, and the total weight ratio of linoleic acid and linear fatty acid (a) is 95% by weight or more. That is, the fatty acid is substantially composed of linoleic acid and a linear fatty acid (a).

The ratio of linoleic acid in all linear fatty acids is from 5 to 20% by weight, more preferably from 6 to 19% by weight, still more preferably from 7 to 18% by weight. When the ratio of linoleic acid is less than 5% by weight, sufficient oil film strength cannot be obtained, and fluff is generated, and high-quality fibers cannot be obtained. On the other hand, when the ratio of linoleic acid exceeds 20% by weight, the heat resistance of the treating agent is deteriorated, and roll contamination occurs, and as a result, fluff and yarn breakage are generated.

The ratio of the linear fatty acid (a) to all linear fatty acids is from 75 to 95% by weight, more preferably from 76 to 94% by weight, still more preferably from 77 to 93% by weight. When the ratio is less than 75% by weight, the oil film strength of the ester is insufficient, and the molecular weight becomes large, and sufficient smoothness cannot be obtained. Therefore, fluff is generated and high-quality fibers cannot be obtained. On the other hand, when the ratio exceeds 95% by weight, the content of linoleic acid is insufficient, and in this case, the oil film strength is lowered to produce fluff.

Further, the total weight ratio of linoleic acid and linear fatty acid (a) to all linear fatty acids is 95% by weight or more, preferably 96% by weight. More preferably, it is 97% by weight. When the ratio is less than 95% by weight, sufficient oil film strength cannot be obtained, and fluff is generated, and high-quality fibers cannot be obtained.

The weight ratio of the linoleic acid in all of the linear fatty acids is preferably 2% by weight or less, more preferably 1% by weight or less, still more preferably 0.5% by weight or less. When the weight ratio exceeds 2% by weight, the heat resistance of the treating agent is deteriorated, and roll contamination occurs, and as a result, fluff and yarn breakage are generated.

Further, the weight ratio of each fatty acid can be quantified by gas chromatography (gas chromatography-GC-2010 manufactured by SHIMADZU Co., Ltd., column: DB-WAXETR manufactured by Agilent Technologies, Inc.).

Further, the linear fatty acid (a) may be a saturated fatty acid or an unsaturated fatty acid. The linear fatty acid (a) has a carbon number of 14 to 22, and more preferably 14 to 20. When the number of carbon atoms is less than 14, a sufficient oil film strength cannot be obtained, and fluff is generated. If the number of carbon atoms exceeds 22, the smoothness of the ester is insufficient and the pile is increased.

Examples of the linear fatty acid (a) include myristic acid, myristoleic acid, palmitic acid, palmitolic acid, stearic acid, oleic acid, and trans-oleic acid (elaidic). Acid), linoleic acid, eicosenoic acid, behenic acid, and the like.

The polyol constituting the ester (A) is not particularly limited as long as it is a divalent or higher alcohol. The polyhydric alcohol may, for example, be an aliphatic polyhydric alcohol or an aromatic polyhydric alcohol.

Examples of the aliphatic polyhydric alcohol include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,4-butanediol, 2-methyl-1,3-propanediol, and 1,6- Hexanediol, neopentyl glycol, cyclohexanediol, glycerin, trimethylolpropane, pentaerythritol, butyltetraol, diglycerin, sorbitan, sorbitol, bis(trimethylolpropane), dipentaerythritol, Sucrose and the like.

Examples of the aromatic polyol include bisphenol A, bisphenol Z, and 1,3,5-trihydroxymethylbenzene.

Among these, from the viewpoint of smoothness and reduction of fluff due to strong oil film, the polyhydric alcohol is preferably a 2- to 4-valent alcohol, more preferably a trihydric alcohol, and more preferably a glycerin or a trimethylol group. Aliphatic triol of propane, especially glycerin. If it is more than a quaternary alcohol, the smoothness is poor, the fluff and the yarn breakage are increased, and the yarn quality is lowered.

The iodine value of the ester (A) is preferably from 30 to 80, more preferably from 35 to 75, still more preferably from 40 to 75. When the iodine value of the ester (A) is less than 30, although the roll contamination can be reduced, the effect of suppressing the pile is insufficient. On the other hand, when the iodine value of the ester (A) exceeds 80, heat resistance is deteriorated, and as a result, fluff and yarn breakage are also deteriorated. Further, the iodine value of the present invention is measured in accordance with JIS K-0070.

The acid value of the ester (A) is preferably 7 or less, more preferably 5 or less, still more preferably 3 or less. When the acid value of the ester (A) exceeds 7, a large amount of smoke is generated during the heat treatment, and an odor is generated, which may cause a deterioration in the use environment. Further, the acid value of the present invention is measured in accordance with JIS K-0070.

The hydroxyl value of the ester (A) is preferably from 0.1 to 25, more preferably from 0.5 to 23, still more preferably from 1.0 to 20. When the hydroxyl value of the ester (A) is less than 0.1, it may be difficult to obtain an ester. On the other hand, when the hydroxyl value of the ester (A) exceeds 25, the effect of the treating agent as a smoothing agent may be insufficient, and the pile may be increased. The situation. Further, the hydroxyl value of the present invention is measured in accordance with JIS K-0070.

The weight average molecular weight of the ester (A) is preferably from 500 to 1200, more preferably from 700 to 1,000, still more preferably from 800 to 1,000. When the weight average molecular weight is less than 500, the oil film strength is insufficient, and there is a case where the pile is increased and the smoke is increased during the heat treatment. On the other hand, when the weight average molecular weight exceeds 1200, the smoothness is less than that of the pile, and not only high-quality fibers but also quality in the weaving or weaving step are deteriorated. Further, the weight average molecular weight of the present invention is injected into a separation column KF-402HQ manufactured by Showa Denko Co., Ltd. at a sample concentration of 3 mg/cc using a high-speed gel permeation chromatography apparatus HLC-8220GPC manufactured by TOSOH Co., Ltd. KF-403HQ was calculated based on the peak measured by the differential refractive index detector.

As the ester (A), a commercially available linear fatty acid and a polyhydric alcohol are usually used, and those obtained by a known method can also be used. Further, a natural ester of a natural ester, such as a natural fruit, a seed, or a flower, which satisfies the structure of the ester (A), may be used as it is, and a natural ester may be purified by a known method as needed. The ester after the subsequent ester is further separated and re-refined by a difference in melting point by a known method. The ester (A) is a natural ester or an ester obtained from a natural ester, and an ester which is not subjected to transesterification is preferred. Specifically, the ester (A) is preferably a synthetic ester obtained by reacting a fatty acid with glycerin, an ester obtained by transesterifying two or more kinds of natural esters (fat), a mixed natural ester, a fatty acid, and glycerin. An ester obtained by transesterification without any regulation.

[Nonionic Surfactant (B)]

The treating agent of the present invention is required to contain a nonionic surfactant (B) in addition to the above ester (A). By using the ester (A) and the nonionic surfactant (B) in combination, the oil film strength of the treatment agent is increased, and high yarn-making property is obtained. The nonionic surfactant (B) may be used singly or in combination of two or more.

From the viewpoint of improving the oil film strength of the treating agent and obtaining high yarn-making property, the nonionic surfactant (B) preferably includes: a hydroxy fatty acid polyol ester containing a polyoxyalkylene group and At least one hydroxyl group of the polyoxyalkylene group-containing hydroxy fatty acid polyol ester is selected from at least one nonionic surfactant (B1) selected from the fatty acid-chain-linked ester.

Examples of the nonionic surfactant other than the nonionic surfactant (B1) include polyoxyalkylene polyol ethers, polyoxyalkylene polyol fatty acid esters, and polyoxyalkylene aliphatic alcohol ethers. , fatty acid esters of polyalkylene glycols, polyhydric alcohol fatty acid esters, and the like.

(nonionic surfactant (B1))

The weight ratio of the nonionic surfactant (B1) to the entire nonionic surfactant (B) is preferably from 5 to 95% by weight, more preferably from 8 to 93% by weight, still more preferably from 10 to 91% by weight. %. When the weight ratio is less than 5% by weight, the oil film strength of the treating agent is lowered, the pile is increased, and the stability is insufficient when the treating agent is used in the emulsion. On the other hand, when the polymerization ratio exceeds 95% by weight, there is a case where the smoothness of the treating agent is insufficient and the pile is increased.

A polyoxyalkylene group-containing hydroxy fatty acid polyol ester (hereinafter sometimes referred to as a polyhydroxy ester), which is one of the nonionic surfactants (B1), is structurally a polyoxyalkylene group-containing hydroxy fatty acid. An ester of a polyhydric alcohol, and two or more hydroxyl groups in the hydroxyl group of the polyhydric alcohol are esterified. by Thus, the hydroxy fatty acid polyol ester containing a polyoxyalkylene group is an ester having a plurality of hydroxyl groups.

The hydroxy fatty acid having a polyoxyalkylene group has a structure in which a polyoxyalkylene group is bonded to a hydrocarbon group of a fatty acid via an oxygen atom, and one end of the polyoxyalkylene group which is not bonded to a hydrocarbon group of the fatty acid is a hydroxyl group.

The polyhydroxy ester may, for example, be an alkylene oxide adduct of an esterified product of a hydroxy fatty acid having 6 to 22 (preferably 16 to 20) carbon atoms and a polyhydric alcohol.

Examples of the hydroxy fatty acid having 6 to 22 carbon atoms include hydroxyoctanoic acid, hydroxydecanoic acid, hydroxylauric acid, hydroxystearic acid, and ricinoleic acid, preferably hydroxyoctadecanoic acid and ricinoleic acid. Examples of the polyhydric alcohol include ethylene glycol, glycerin, sorbitol, sorbitan, trimethylolpropane, and pentaerythritol, and glycerin is preferred. The alkylene oxide may, for example, be an alkylene oxide having 2 to 4 carbon atoms such as ethylene oxide, propylene oxide or butylene oxide.

The addition mole number of the alkylene oxide is preferably from 3 to 60, more preferably from 8 to 50. The ratio of ethylene oxide to alkylene oxide is preferably 50 mol% or more, more preferably 80 mol% or more.

In the case of adding two or more kinds of alkylene oxides, the order of addition is not particularly limited, and the addition state may be any of a block shape and a random shape. The addition of alkylene oxide can be carried out by a known method, but usually in the presence of a basic catalyst.

Polyhydroxy esters can be esterified, for example, by esterification of a polyol and a hydroxy fatty acid (hydroxymonocarboxylic acid) under ordinary conditions. The product is then produced by subjecting an alkylene oxide to an addition reaction with the esterified product. As the polyhydroxy ester, a natural-derived fat or oil such as castor oil or a hardened castor oil to which hydrogen is added may be used, and an addition reaction with an alkylene oxide may be carried out to produce it as appropriate.

The nonionic surfactant (B1) also includes an ester obtained by blocking at least one hydroxyl group of the above polyhydroxy ester with a fatty acid. The number of carbon atoms of the fatty acid used for the chain closure is preferably from 6 to 24, more preferably from 12 to 18. The hydrocarbon group in the fatty acid may have a distribution of carbon atoms, and the hydrocarbon group may be linear or branched, may be saturated or unsaturated, or may have a polycyclic structure. Examples of such a fatty acid include lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, eicosenoic acid, behenic acid, and tetracosanoic acid. The method of esterification, the reaction conditions, and the like are not particularly limited, and a known method and usual conditions can be employed.

As nonionic surfactant (B1), for example, hardened castor oil ethylene oxide adduct, castor oil ethylene oxide adduct, hardened castor oil ethylene oxide adduct monooleate, hardened castor oil Ethylene oxide adduct dioleate, hardened castor oil ethylene oxide adduct trioleate, castor oil ethylene oxide adduct trioleate, hardened castor oil ethylene oxide addition Tristearate, castor oil, ethylene oxide adduct, tristearate; among these, from the viewpoint of compatibility of the treating agent, oil film strength, and reduction of fluff, it is preferred to harden castor oil. Ethylene oxide adduct, hardened castor oil ethylene oxide adduct trioleate, hardened castor oil ethylene oxide adduct tristearate.

(polyoxyalkylene polyol ether)

Polyoxyalkylene polyol ether, which has a relative to polyol addition A compound having a structure of an alkylene oxide such as ethylene oxide, propylene oxide or butylene oxide.

Examples of the polyhydric alcohol include ethylene glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, sorbitan, sorbitol, bis(trimethylolpropane), dipentaerythritol, and sucrose. Among these, glycerin, trimethylolpropane, and sucrose are preferred.

The addition mole number of the alkylene oxide is preferably from 3 to 100, more preferably from 4 to 70, still more preferably from 5 to 50. Further, the ratio of ethylene oxide to alkylene oxide is preferably 50 mol% or more, and more preferably 80 mol% or more.

The polyoxyalkylene polyol ether preferably has a weight average molecular weight of from 300 to 10,000, more preferably from 400 to 8,000, still more preferably from 500 to 5,000. When the molecular weight is less than 300, the generation of fluff and yarn breakage cannot be reduced. On the other hand, if the molecular weight exceeds 10,000, the friction of the treating agent becomes high, and it is not only impossible to reduce the occurrence of fluff and yarn breakage, but it is rather deteriorated.

Examples of the polyoxyalkylene polyol ether include polyethylene glycol, glycerin ethylene oxide adduct, trimethylolpropane ethylene oxide adduct, and pentaerythritol ethylene oxide adduct. Diglycerin ethylene oxide adduct, sorbitan ethylene oxide adduct, sorbitan oxide ethylene oxide propylene oxide adduct, sorbitol ethylene oxide adduct, sorbitol epoxy B An alkoxypropylene oxide adduct, a bis(trimethylolpropane)ethylene oxide adduct, a dipentaerythritol ethylene oxide adduct, a sucrose ethylene oxide adduct, or the like, but is not limited thereto.

(polyoxyalkylene polyol fatty acid ester)

The polyoxyalkylene polyol fatty acid ester is obtained by adding an alkylene oxide such as ethylene oxide, propylene oxide or butylene oxide to the polyol. A compound of a structure in which a compound forms an ester bond with a fatty acid.

Examples of the polyhydric alcohol include glycerin, trimethylolpropane, pentaerythritol, tetramethylene alcohol, diglycerin, sorbitol anhydride, sorbitol, bis(trimethylolpropane), dipentaerythritol, and sucrose. Among these, glycerin, diglycerin, sorbitan, and sorbitol are preferred.

Examples of the fatty acid include lauric acid, myristic acid, myristic acid, palmitic acid, palmitoleic acid, isohexadecanoic acid, stearic acid, isostearic acid, oleic acid, trans-oleic acid, and linoleic acid. Acid, linoleic acid, arachidic acid, eicosenoic acid, behenic acid, isotonic acid, erucic acid, lignoceric acid, iso-tetracosanoic acid, etc. .

The addition mole number of the alkylene oxide is preferably from 3 to 100, more preferably from 5 to 70, still more preferably from 10 to 50. Further, the ratio of ethylene oxide to alkylene oxide is preferably 50 mol% or more, more preferably 80 mol% or more.

The polyoxyalkylene polyol fatty acid ester preferably has a weight average molecular weight of from 300 to 7,000, more preferably from 500 to 5,000, still more preferably from 700 to 3,000. When the molecular weight is less than 300, there is a case where smoke is generated in the heat treatment step and the environment is deteriorated. In addition, there is a case where the occurrence of yarn breakage cannot be reduced. On the other hand, when the molecular weight exceeds 7,000, the friction of the treatment agent becomes high, and not only the occurrence of fluff and yarn breakage but also deterioration may occur.

Examples of the polyoxyalkylene polyol fatty acid esters include glycerin ethylene oxide adduct monolaurate, glycerin ethylene oxide adduct dilaurate, and glycerin ethylene oxide adduct. Trilaurate, trishydroxylate Propane ethylene oxide adduct trilaurate, sorbitan ethylene oxide adduct monooleate, sorbitan ethylene oxide adduct dioleate, sorbitan epoxy B Alkane adduct trioleate, sorbitan oxide ethylene oxide propylene oxide adduct monooleate, sorbitan oxide ethylene oxide propylene oxide adduct dioleate, sorbitan epoxy Ethane propylene oxide adduct trioleate, sorbitan oxide ethylene oxide propylene oxide adduct trilaurate, sucrose ethylene oxide adduct trilaurate, etc., but not limited to these .

(polyoxyalkylene aliphatic alcohol ether)

The polyoxyalkylene aliphatic alcohol ether refers to a compound having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide or butylene oxide is added to an aliphatic monohydric alcohol.

Examples of the polyoxyalkylene aliphatic alcohol ethers include octanol, 2-ethylhexanol, decyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, and oil. An alkylene oxide adduct of an aliphatic alcohol such as an alcohol.

The addition mole number of the alkylene oxide is preferably from 1 to 100 moles, more preferably from 2 to 70 moles, still more preferably from 3 to 50 moles. Further, the ratio of ethylene oxide to all alkylene oxide is preferably 20 mol% or more, more preferably 30 mol% or more, still more preferably 40 mol% or more.

(fatty acid ester of polyalkylene glycol)

The fatty acid ester of a polyalkylene glycol means a compound having a structure in which a polyethylene glycol, a polyethylene oxide polypropylene glycol, and a fatty acid form an ester bond. The polyalkylene glycol preferably has a weight average molecular weight of from 100 to 1,000, more preferably from 150 to 800, still more preferably from 200 to 700.

As the polyalkylene glycol fatty acid ester, there can be mentioned polyethylene glycol Glycol monolaurate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol dioleate, polyethylene glycol monostearate, polyethylene glycol di-hard Fatty acid ester, polyethylene polypropylene glycol monolaurate, polyethylene polypropylene glycol dilaurate, polyethylene polypropylene glycol monooleate, polyethylene polypropylene glycol dioleate, etc., but are not limited thereto.

(polyol fatty acid ester)

The polyhydric alcohol fatty acid ester is a compound having a structure in which an ester bond is formed between a polyhydric alcohol and a fatty acid, and is a compound excluding the above polyhydric alcohol fatty acid ester (A).

Examples of the polyhydric alcohol include ethylene glycol, trimethylolpropane, pentaerythritol, tetrabutyl alcohol, diethylene glycol, diglycerin, sorbitol anhydride, sorbitol, bis(trimethylolpropane), sucrose, and the like. . Among these, ethylene glycol, glycerin, diglycerin, sorbitan, and sorbitol are preferred.

Examples of the fatty acid include lauric acid, myristic acid, myristic acid, palmitic acid, palmitoleic acid, isohexadecanoic acid, stearic acid, isostearic acid, oleic acid, trans-oleic acid, and linoleic acid. Acid, linoleic acid, tuberculostearic acid, iso-icosanoic acid, gadoleic acid, eicosenoic acid, behenic acid, iso 22 Acid, erucic acid, tetrakisic acid, and the like.

Further, the polyol fatty acid ester has at least one or two or more hydroxyl groups.

The weight average molecular weight of the polyol fatty acid ester is preferably from 100 to 1,000, more preferably from 200 to 800, still more preferably from 300 to 600.

Examples of the fatty acid esters include glycerin monolaurate, glycerin dilaurate, glycerin monooleate, glyceryl dioleate, and mountains. Pear anhydride monooleate, sorbitan dioleate, sucrose monolaurate, sucrose dilaurate, etc., but is not limited thereto.

[Processing agent for synthetic fiber]

The treating agent for synthetic fibers of the present invention needs to contain the above ester (A) and nonionic surfactant (B). The weight ratio of the ester (A) to the nonvolatile content of the treating agent is preferably from 10 to 70% by weight, more preferably from 13 to 67% by weight, still more preferably from 15 to 65% by weight. When the weight ratio is less than 10% by weight, there is a case where the generation of fluff cannot be sufficiently reduced. On the other hand, when the polymerization ratio exceeds 70% by weight, the fiber bundle property is deteriorated and the pile is increased. Moreover, the non-volatile component of the present invention refers to an absolute dry component when the treatment agent is heat-treated at 105 ° C to remove a solvent or the like and reaches a constant amount.

The weight ratio of the nonionic surfactant (B) to the treating agent is preferably from 15 to 65% by weight, more preferably from 20 to 63% by weight, still more preferably from 25 to 60% by weight. When the weight ratio is less than 15% by weight, there is a case where the oil film strength of the treating agent is lowered and the pile is increased. On the other hand, when the weight ratio exceeds 65% by weight, the amount of the ester component used may be reduced, and the smoothness may be insufficient and the pile may be increased.

In order to further exert the effects of the present invention, the total weight ratio of the ester (A) and the nonionic surfactant (B) to the treatment agent is preferably 30% by weight or more, more preferably 35% by weight or more, and still more. Preferably, it is 40% by weight or more.

(other ingredients)

For the treatment agent for synthetic fibers of the present invention, for the treatment of the milk A surfactant other than the above-mentioned nonionic surfactant (B) may be contained, and the adhesion to the fiber may be assisted, the treatment agent may be washed away from the fiber water, and the antistatic property, lubricity, and bundling property may be imparted to the fiber. Examples of such a surfactant include an anionic surface such as a metal salt or an amine salt of an alkyl phosphate, a metal salt or an amine salt of a polyoxyalkylene alkyl phosphate, an alkyl sulfonate or a fatty acid soap. An active agent; a cationic surfactant such as an alkylamine salt, an alkylimidazoline salt or a quaternary ammonium salt; an amphoteric surfactant such as lauryl dimethyl betaine or stearyl dimethyl betaine. These surfactants may be used alone or in combination of two or more. When the surfactant is contained, the weight ratio of the surfactant to the nonvolatile component of the treating agent is not particularly limited, and is preferably from 0.01 to 15% by weight, more preferably from 0.1 to 10% by weight. Further, the weight average molecular weight of the surfactant herein is less than 1,000.

The treatment agent for synthetic fibers of the present invention may further contain an alkyl sulfonate from the viewpoint of improving heat resistance. The alkyl sulfonate represented by the formula [I] described in JP-A-H08-120564 is exemplified as the alkyl sulfonate. The alkyl sulfonate may be used singly or in combination of two or more. When the alkylsulfonate is contained, the weight ratio of the alkylsulfonate to the nonvolatile component of the treating agent is not particularly limited, and is preferably from 0.5 to 5.0% by weight, more preferably from 1.5 to 4.0% by weight.

Further, in order to impart heat resistance, the treating agent for synthetic fibers of the present invention may further contain an antioxidant. Examples of the antioxidant include well-known materials such as phenols, sulfurs, and phosphites. The antioxidants may be used singly or in combination of two or more. Anti-oxidant, anti-oxidant The weight ratio of the oxidizing agent in the nonvolatile matter of the treating agent is not particularly limited, and is preferably from 0.1 to 5% by weight, more preferably from 0.1 to 3% by weight.

Further, the treating agent for synthetic fibers of the present invention may further contain a stock solution stabilizer (for example, water, ethylene glycol, or propylene glycol). The weight ratio of the stock stabilizer to the treating agent is preferably from 0.1 to 30% by weight, more preferably from 1 to 20% by weight.

Further, the treatment agent for synthetic fibers of the present invention may contain a diester compound of thiodipropionic acid and an aliphatic alcohol, within a range not impairing the effects of the present invention.

The diester compound of thiodipropionic acid and an aliphatic alcohol is a component having antioxidant ability. By using the diester compound, the heat resistance of the treatment agent can be improved. They may be used alone or in combination of two or more. The molecular weight of the thiodipropionic acid constituting the diester compound is preferably from 400 to 1,000, more preferably from 500 to 900, still more preferably from 600 to 800. The aliphatic alcohol constituting the diester compound may be saturated or unsaturated. Further, the aliphatic alcohol may be linear or branched, but preferably has a branched structure. The aliphatic alcohol preferably has 8 to 24 carbon atoms, more preferably 12 to 24 carbon atoms, still more preferably 16 to 24 carbon atoms. Examples of the aliphatic alcohol include octanol, 2-ethylhexanol, decyl alcohol, lauryl alcohol, myristyl alcohol, isocetyl alcohol, oleyl alcohol, and isostearyl alcohol. Among them, preferred Oleic alcohol, isostearyl alcohol.

The treatment agent for synthetic fibers of the present invention may be composed of the above-mentioned components containing only nonvolatile components, or may be composed of a nonvolatile component and a stock solution stabilizer, or may be a non-volatile component diluted with a low-viscosity mineral oil, or may be An aqueous emulsion obtained by emulsifying a nonvolatile component in water. When the treating agent for synthetic fibers of the present invention is an aqueous emulsion obtained by emulsifying a nonvolatile component in water, the concentration of the nonvolatile component is preferably from 5 to 35% by weight, more preferably from 6 to 30% by weight. From the viewpoint of uniformly imparting to the fibrous material, the viscosity (30 ° C) of the post-treatment agent diluted with the low-viscosity mineral oil is preferably from 3 to 120 mm ² /s, and more preferably from 5 to 100 mm ² /s. .

The method for producing the treatment agent for synthetic fibers of the present invention is not particularly limited, and a known method can be employed. The treating agent for synthetic fibers is produced by adding and mixing the above respective components constituting the treating agent in an arbitrary or specific order.

[Manufacturing method and fiber structure of synthetic fiber filament yarn]

The method for producing a synthetic fiber filament yarn of the present invention comprises the step of imparting a treating agent for synthetic fibers of the present invention to a raw material synthetic fiber filament yarn. The step of imparting is not particularly limited, and a known method can be used. Usually, a treating agent for synthetic fibers is imparted in the spinning step of the raw synthetic fiber filament yarn. After the treatment agent is applied, it is stretched, heat-set, and wound by a heat roller. In the case where the treatment agent is applied, the treatment for the synthetic fiber of the present invention can be suitably used without performing the temporary winding but the step of performing the heat extension. The temperature at the time of heat extension, for example, in the case of polyester or nylon, is estimated to be 210 to 260 ° C for industrial materials, and 110 to 180 ° C for clothing.

The synthetic fiber treating agent when the synthetic fiber filament yarn is supplied as described above may be a treatment agent containing only a nonvolatile component, a treatment agent for diluting a nonvolatile component with a low viscosity mineral oil, or a nonvolatile component in water. An aqueous emulsion treatment agent obtained by emulsification. As a method of giving, there is no special The definition can be exemplified by: rail supply oil, roller oil supply, immersion oil supply, spray oil supply, and the like. Among these, from the viewpoint of easy management of the amount of application, it is preferable to supply oil to the guide rail and to supply oil to the roller.

The amount of the non-volatile component of the treating agent for synthetic fibers is preferably 0.05 to 5% by weight, more preferably 0.1 to 3% by weight, still more preferably 0.1 to 2% by weight, based on the raw material synthetic fiber filament yarn. When it is less than 0.05% by weight, there is a case where the effects of the present invention are not exhibited. On the other hand, when it exceeds 5% by weight, the non-volatile component of the treating agent tends to fall off on the yarn path, and the tar on the heat roller is remarkably increased, thereby affecting the condition of the pile and the yarn breakage.

Examples of the (raw material) synthetic fiber filament yarn include filament yarns of synthetic fibers such as polyester fibers, polyamide fibers, and polyolefin fibers. The treating agent for synthetic fibers of the present invention is suitable for synthetic fibers such as polyester fibers, polyamide fibers, and polyolefin fibers. Examples of the polyester fiber include polyester (PET) having ethylene terephthalate as a main structural unit, polyester (PTT) having propylene terephthalate as a main structural unit, and p-benzoic acid. Polybutylene dicarboxylate (PBT) having a main structural unit, polyester (PLA) having lactic acid as a main structural unit, and the like, and examples of the polyamidamide fiber include nylon 6, nylon 66, and the like. Examples of the fiber include polypropylene, polyethylene, and the like. The method for producing the synthetic fiber filament yarn is not particularly limited, and a known method can be employed.

(fiber structure)

The fiber structure of the present invention is a synthetic fiber filament yarn obtained by the above production method of the present invention. Specifically, it is used to give this hair A synthetic fiber filament yarn of a synthetic fiber for a synthetic fiber, a textile woven by a water-jet loom, an air-jet loom or a rapier loom, and a circular use Braided by braiding machine, warp knitting machine or weft knitting machine. Further, examples of the use of the fiber structure include industrial materials such as tire cords, safety belts, airbags, fishing nets, and ropes, and clothing applications. The method for producing the textile or the woven fabric is not particularly limited, and a known method can be employed.

[Examples]

Hereinafter, the present invention will be described based on examples. The invention is not limited to the embodiments described herein. Also, "%" in the text and in the table means "% by weight".

[Examples 1 to 9, Comparative Examples 1 to 9] (Processing agents of Examples 1, 7, and 9, and Comparative Examples 1 and 2)

The components described in Tables 4 and 5 were mixed and stirred until uniform to prepare a treating agent. The prepared treating agent was diluted with a low-viscosity mineral oil having 12 to 15 carbon atoms to prepare a treating agent having a nonvolatile content of 70% by weight.

(Examples 2 to 6, 8 and Comparative Examples 3 to 9)

The components described in Tables 4 and 5 were mixed and stirred until uniform to prepare a treating agent. The prepared treating agent was gradually introduced into ion-exchanged water under stirring. After the introduction, the mixture was stirred for 60 minutes until a uniform state was obtained, and a treatment agent having a nonvolatile content of 18% by weight (O/W emulsion state) was prepared.

Using the respective treatment agents prepared above, the following methods were used to evaluate roll contamination, fluff, and yarn breakage. Further, the numbers in Tables 4 to 6 represent parts by weight of the nonvolatile component of the treating agent. Further, the esters (A) in Tables 4 to 6, The details of the esters are shown in Tables 1 and 2, and the details of the other components are shown in Table 3.

Tables 1 and 2 show the weight ratio of the linear fatty acids constituting the ester, the polyol constituting the ester (Gly: glycerin, TMP: trimethylolpropane, PE: pentaerythritol), the iodine value, the hydroxyl value, the acid value, and the weight of the ester. Average molecular weight. As the ester, a commercially available ester obtained by purifying a natural-derived ester by a known method or a product obtained by further purifying the purified ester by a known method using a difference in melting point and re-purifying is used. A-1, A-2, X-1, X-8), or by synthesis using a commercially available linear fatty acid and a polyhydric alcohol by a known method (esters A-3 to A-8, X-2 to X-7, X-9 to X-11). Although an example using the following synthesis method is listed, the preparation method is not particularly limited. Further, the numbers after C in Tables 1 and 2 indicate the number of carbon atoms of the linear fatty acid, and the number after F indicates the number of double bonds in the linear fatty acid.

9.8 parts of purified glycerin, 13.5 parts of linoleic acid (Nippon oil linoleic acid 90), 36.1 parts of oleic acid (NAA-34 manufactured by Nippon Oil), and 40.6 parts of stearic acid (NAA-180 manufactured by Nippon Oil Co., Ltd.) were mixed. And 1.0 part of p-toluenesulfonic acid was mixed as a reaction catalyst. The temperature was raised to 210 ° C under a nitrogen gas stream for 1 hour. Then, the temperature was raised to 250 ° C and the reaction was carried out for 8 hours. The reaction catalyst and unreacted fatty acid were removed from the ester after the reaction to obtain an ester A-6 having an iodine value of 60, an acid value of 0.7, and a hydroxyl value of 5.2.

(roller contamination)

For the 1000 denier, 96 filament oil-free polyester filaments (original filaments), the rail oil supply method is used to impart a non-volatile content. The treatment agent prepared above was applied in such a manner as to be 0.6% by weight, and allowed to stand in a gas atmosphere at a temperature of 25 ° C and a humidity of 65% for 48 hours to adjust the humidity.

The raw yarn with adjusted humidity was brought into contact with a friction body of 250 ° C (chrome plated with pear surface, diameter 5 cm) by a yarn running friction tester (manufactured by Toray Engineering Co., Ltd.), and the yarn was loaded with a load of 500 g and a running speed of 200 m/min. In the hour, the contamination adhering to the friction body was judged by the following conditions, and the roller contamination was evaluated. The results are shown in Tables 4 and 5.

○: no tar formation, or very little tar

×: See obvious tar compound

(broken yarn, fluff)

In the melt spinning step, the yarn obtained by melt-spinning and cooling and solidifying the polyester polymer is supplied to the above-prepared treating agent by using a rail oil supply method so that the amount of the nonvolatile component is 0.6% by weight. .

The yarn after the treatment agent was applied was continuously stretched without being temporarily wound up, and extended to 5.1 times by a hot roll at 250 ° C to obtain 1000 denier, 96 filament polyethylene terephthalate. Multifilament. The stretched, heat set yarn is rolled up, and the yarn is interlaced before the roll is about to be rolled up, so that the filaments are bundled with each other. Interlacing is performed by injecting a high pressure fluid through a nozzle, such as jetting high pressure air. For the fluff and the yarn break, the evaluation was carried out by the following conditions. The results are shown in Tables 4 and 5.

Broken yarn: For each treatment agent, the number of yarn breaks per ton of raw yarn was evaluated, less than one time was ○, and one time or more was ×.

Fluff: The number of fluffs of the yarn to which the respective treatment agents are attached is checked by a pile counter, and the value per million m is less than one, and is ○, and one or more is ×.

[Examples 10 to 13, Comparative Examples 10 to 16]

The components described in Table 6 were mixed and stirred until uniform to prepare a treating agent. The prepared treating agent was gradually introduced into ion-exchanged water under stirring. After the introduction, the mixture was stirred for 60 minutes until it became a uniform state, and a treatment agent having a nonvolatile content of 16% by weight (O/W emulsion state) was prepared. The roller contamination, fluff, and yarn breakage were evaluated using the prepared treating agent and the method described later.

(roller contamination)

By the nozzle oil supply method, the above-prepared treatment agent is applied to the oil-free polyester filament (original yarn) of 75 denier and 36 filaments so that the amount of the non-volatile component is 0.7% by weight. The temperature was allowed to stand for 48 hours in a gas atmosphere of 25 ° C and a humidity of 65% to adjust the humidity.

The raw yarn with adjusted humidity was brought into contact with a friction body of 150 ° C (chrome plated with pear surface, diameter 5 cm) by a yarn running friction tester (manufactured by Toray Engineering Co., Ltd.), and the yarn was loaded with a load of 20 g and a running speed of 200 m/min. In the hour, the contamination adhering to the friction body was judged under the following conditions, and the roller contamination was evaluated. The results are shown in Table 6.

○: No tar is seen, or very little

×: See obvious tar compound

(broken yarn, fluff)

In the melt-spinning step, the yarn obtained by melt-spinning and cooling and solidifying the polyester polymer is applied to the above-described prepared treatment so that the amount of the non-volatile component is 0.7% by weight. Agent.

The yarn to which the treatment agent was applied was continuously stretched without being temporarily wound, and was extended by 2.6 times through a hot roll at 150 ° C to obtain 75 denier, 36. Filament polyethylene terephthalate multifilament. The stretched, heat-set yarns are rolled up, and the yarns are interwoven before the rolls are rolled up, so that the filaments are bundled with each other. The interlacing is carried out by spraying a high pressure fluid such as high pressure air through a nozzle. For the fluff and the yarn breakage, the evaluation was carried out under the following conditions, and the results are shown in Table 6.

Broken yarn: For each treatment agent, the number of broken wires per ton of raw yarn was evaluated, less than one time was ○, and one time or more was ×.

Fluff: The number of fluffs of the yarn to which the respective treatment agents are attached is checked by a pile counter, and the value per million m is less than one, and is ○, and one or more is ×.

As is apparent from Tables 4 to 6, Examples 1 to 13 of the present invention remarkably reduce the occurrence of yarn breakage and fluff. Moreover, the roller has less pollution and excellent heat resistance. Different, does not deteriorate the production environment. On the other hand, in Comparative Examples 1 to 16, at least one of the yarn breakage evaluation, the fluff evaluation, and the roll evaluation was poor, and not all the evaluators were satisfied.

(industrial availability)

The synthetic fiber treating agent of the present invention is suitable for use in synthetic fiber filament yarns used for tarpaulins, tire cords, safety belts, airbags, fishing nets, ropes, and the like for industrial materials, textiles, woven fabrics, and the like. .

Claims (10)

A treatment agent for synthetic fibers, which comprises: an ester (A) having a structure in which an ester bond is formed between a polyol and a linear fatty acid, and a nonionic surfactant (B); wherein the linear fatty acid comprises linoleic acid And a linear fatty acid having 14 to 22 carbon atoms other than linoleic acid, the ratio of linoleic acid in all linear fatty acids is 5 to 20% by weight, linoleic acid and linoleic acid in addition to linoleic acid The weight ratio of the total of the linear fatty acids having 14 to 22 carbon atoms is 95% by weight or more, and the weight ratio of the linoleic acid is 2% by weight or less. The treatment agent for synthetic fibers according to the above aspect of the invention, wherein the ester (A) has an iodine value of from 30 to 80. The treatment agent for synthetic fibers according to claim 1 or 2, wherein, in the nonvolatile component of the treatment agent, the weight ratio of the ester (A) is from 10 to 70% by weight, the nonionic surface The active agent (B) occupies a weight ratio of 15 to 65% by weight. The treatment agent for synthetic fibers according to any one of claims 1 to 3, wherein the polyol is a triol. The treatment agent for synthetic fibers according to any one of claims 1 to 4, wherein the ester (A) has a weight average molecular weight of 500 to 1200. The treatment agent for synthetic fibers according to any one of claims 1 to 5, wherein the nonionic surfactant (B) comprises a hydroxy fatty acid polyol ester containing a polyoxyalkylene group and Polyol ester At least one hydroxyl group is selected from at least one nonionic surfactant (B1) selected from the esters of the fatty acid chain. The treatment agent for synthetic fibers according to any one of claims 1 to 6, wherein the nonionic surfactant (B1) accounts for the weight ratio of the entire nonionic surfactant (B). It is 5 to 95% by weight. A synthetic fiber filament yarn obtained by the raw material synthetic fiber filament yarn, which is obtained by the treatment agent for synthetic fibers according to any one of claims 1 to 7. A process for producing a synthetic fiber filament yarn, which comprises the step of imparting a treating agent for synthetic fibers according to any one of claims 1 to 7 to a raw material synthetic fiber filament yarn. A fiber structure comprising the synthetic fiber filament yarn according to item 8 of the patent application and/or the synthetic fiber filament yarn obtained by the production method of claim 9 of the patent application.