JPWO2014024647A1 - Treatment agent for synthetic fibers and use thereof - Google Patents

Abstract

An object of the present invention is to provide a treating agent for synthetic fibers that is used when producing synthetic fibers, can remarkably reduce the occurrence of fluff and yarn breakage, has excellent heat resistance, and does not deteriorate the production environment. It is in. The present invention essentially contains a polyhydric alcohol fatty acid ester (A) having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and a nonionic surfactant (B), wherein the fatty acid comprises linoleic acid and linoleic acid. The ratio of linoleic acid in the total fatty acid is 5 to 20% by weight, and the total weight ratio of linoleic acid and fatty acid having 14 to 22 carbon atoms excluding linoleic acid is 95. It is a treatment agent for synthetic fibers which is at least% by weight.

Description

  The present invention relates to a treatment agent for synthetic fibers and use thereof. More specifically, a synthetic fiber treatment agent that can be used in the production of synthetic fibers to reduce fluff and yarn breakage, a synthetic fiber filament yarn provided with the treatment agent, and a synthesis using the treatment agent The present invention relates to a method for producing a fiber filament yarn, and a fiber structure including a synthetic fiber filament yarn obtained by the production method.

  In recent years, synthetic fibers have been provided with high functionality such as high-multiplicity, irregular cross-section, high strength, and low shrinkage. Further, in the production of synthetic fibers, in order to improve production efficiency, production speed is increased and heat treatment temperature is increased. Increasing the production speed has a problem in that damage to synthetic fibers increases and fluff and yarn breakage increase. Further, the heat treatment may be performed at a higher temperature by increasing the temperature of the heat setting roller for compensating for the lack of heat history of the synthetic fiber due to the increased speed or for increasing the functionality such as high strength. Increasing the temperature of the heat setting roller causes an increase in dirt on the heat setting roller due to the heat deterioration of the treating agent for synthetic fibers, thereby causing a problem that the production environment deteriorates and the productivity decreases.

  In order to solve these problems, the following prior art has been proposed. For example, Patent Document 1 proposes a treatment agent having excellent lubricity using a thiodipropionic acid ester in order to reduce fluff and yarn breakage. A treating agent using a thiodipropionic acid ester has low fiber-to-metal and fiber-to-fiber friction, has better heat resistance than conventional lubricants, and can reduce fuzz and yarn breakage. However, with the recent increase in the temperature of heat setting rollers, smoke generation increases, the working environment deteriorates, dirt on the rollers increases, and frequent roller cleaning is required, resulting in high-quality fibers I couldn't.

  Patent Document 2 proposes a treating agent using a fatty acid ester of an alkylene oxide adduct of bisphenol A in order to improve dirt on a heat setting roller. The treatment agent using fatty acid ester of bisphenol A alkylene oxide adduct has good heat resistance, but high friction between fiber and metal, and between fiber and fiber, and lubricity which is a necessary characteristic as a treatment agent for synthetic fibers. It was inferior. As a result, damage to the fiber in the fiber manufacturing process and processing process has increased, fluff and yarn breakage have increased, and it has not been possible to satisfy the high demands demanded of today's fibers.

  Patent Document 3 uses a dibasic acid thiodipropionate ester and an antioxidant to reduce the amount of tar accumulated on the drawing roller and reduce the occurrence of fluff and yarn breakage. A treating agent for fibers having an iodine value of 4 or less has been proposed. However, although the fiber treatment agent of Patent Document 3 is effective in preventing tar accumulation, since the molecular weight of the ester is small, there is a problem that the fiber is not sufficiently protected and the fluff is increased.

  As described above, conventional synthetic fiber treatment agents cannot address these problems, and high-performance fibers in recent years can be produced with high quality, have excellent heat resistance, and do not deteriorate the production environment. It had been.

Japanese Unexamined Patent Publication No. 54-147214 Japanese Patent Publication No. 47-29474 Japanese Unexamined Patent Publication No. 2009-235647

  An object of the present invention is a synthetic fiber treating agent that is used in the production of synthetic fibers, can remarkably reduce the occurrence of fluff and yarn breakage, has excellent heat resistance, and does not deteriorate the production environment. Is to provide a synthetic fiber filament yarn to which is provided, a method for producing a synthetic fiber filament yarn using the treatment agent, and a fiber structure including the synthetic fiber filament yarn obtained by the production method.

  As a result of intensive studies to solve the above problems, the present inventors have found that if a treating agent for synthetic fibers that essentially contains a specific polyhydric alcohol fatty acid ester (A) and a nonionic surfactant is used, fluffing, breaking It has been found that the generation of yarn can be remarkably reduced, the yarn quality is remarkably improved, and excellent yarn-making properties can be obtained. Further, it has been found that the treatment agent for synthetic fibers has little roller contamination due to tar during heat treatment and does not deteriorate the production environment.

  That is, the synthetic fiber treatment agent of the present invention essentially contains a polyhydric alcohol fatty acid ester (A) having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and a nonionic surfactant (B). However, the fatty acid contains linoleic acid and a fatty acid having 14 to 22 carbon atoms excluding linoleic acid, the proportion of linoleic acid in the total fatty acid is 5 to 20% by weight, and the number of carbon atoms excluding linoleic acid and linoleic acid is 14 The total weight ratio with ˜22 fatty acids is 95% by weight or more.

  The weight ratio of the ester (A) in the nonvolatile content of the treatment agent is preferably 10 to 70% by weight, and the weight ratio of the nonionic surfactant (B) is preferably 15 to 65% by weight.

The polyhydric alcohol is preferably a trihydric alcohol.
The iodine value of the ester (A) is preferably 30-80. The ester (A) preferably has a weight average molecular weight of 500 to 1200.

  The nonionic surfactant (B) is a polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester and at least one nonionic surfactant selected from esters obtained by blocking at least one hydroxyl group of the polyhydric alcohol ester with a fatty acid ( B1) is preferably included.

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

The synthetic fiber filament yarn of the present invention is obtained by adding the above-described treatment agent to a raw material synthetic fiber filament yarn.
The manufacturing method of the synthetic fiber filament yarn of this invention includes the process of providing said processing agent to a raw material synthetic fiber filament yarn.
The fiber structure of the present invention includes the synthetic fiber filament yarn of the present invention and / or the synthetic fiber filament yarn obtained by the production method of the present invention.

When synthetic fibers are produced using the synthetic fiber treating agent of the present invention, the occurrence of fluff and yarn breakage can be significantly reduced. Moreover, the processing agent for synthetic fibers of this invention is excellent in heat resistance, and does not worsen production environment.
According to the production method of the present invention, the occurrence of fluff and yarn breakage can be significantly reduced, and a synthetic fiber filament yarn excellent in yarn quality can be produced. Further, a high-quality raw yarn with less tar can be obtained. The synthetic fiber filament yarn of the present invention is less prone to fluff and breakage and is excellent in yarn quality.
Since the fiber structure of the present invention uses high-quality raw yarn, it is excellent in quality.

  The processing agent for synthetic fibers of this invention contains a specific polyhydric alcohol fatty acid ester (A) and a nonionic surfactant (B) essential. Details will be described below.

[Polyhydric alcohol fatty acid ester (A)]
The polyhydric alcohol fatty acid ester (A) is an essential component of the treatment agent of the present invention, and is an ester having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded. When only an ester having a structure in which a monohydric alcohol and a fatty acid are ester-bonded is used instead of the ester (A), the smoothness is excellent, but the strength of the oil film protecting the fiber is weak, and the fluff is increased. 1 type (s) or 2 or more types may be used for ester (A). The ester (A) is a compound having no polyoxyalkylene group in the molecule.

  The fatty acid constituting the ester (A) contains linoleic acid and a fatty acid having 14 to 22 carbon atoms excluding linoleic acid (hereinafter referred to as fatty acid (a)), and the proportion of linoleic acid in the total fatty acid is 5 to 5. 20% by weight, and the total weight ratio of linoleic acid and fatty acid (a) is 95% by weight or more. That is, the fatty acid is substantially composed of linoleic acid and fatty acid (a).

The proportion of linoleic acid in the total fatty acid is 5 to 20% by weight, more preferably 6 to 19% by weight, and even more preferably 7 to 18% by weight. When the proportion of linoleic acid is less than 5% by weight, sufficient oil film strength cannot be obtained, fluff is generated, and high-quality fibers cannot be obtained. On the other hand, when the proportion of linoleic acid is more than 20% by weight, the heat resistance of the treatment agent is deteriorated and roller dirt is generated. As a result, fluff and yarn breakage are generated.
The ratio of the fatty acid (a) in the total fatty acid is 75 to 95% by weight, more preferably 76 to 94% by weight, and further preferably 77 to 93% by weight. When the ratio is less than 75% by weight, the ester oil film strength is insufficient, or the molecular weight becomes large and sufficient smoothness cannot be obtained. As a result, fluffing occurs and high-quality fibers may not be obtained. On the other hand, when the ratio is more than 95% by weight, the content of linoleic acid is insufficient, and in this case as well, the oil film strength is lowered and fluff may be generated.
The total weight ratio of linoleic acid and fatty acid (a) in the total fatty acid is 95% by weight or more, preferably 96% by weight or more, and more preferably 97% by weight or more. When the ratio is less than 95% by weight, sufficient oil film strength cannot be obtained, fluff is generated, and high-quality fibers cannot be obtained.

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

  Examples of the fatty acid (a) include myristic acid, myristoleic acid, palmitic acid, palmitoleic acid, isocetyl acid, stearic acid, isostearic acid, oleic acid, elaidic acid, linolenic acid, eicosenoic acid, behenic acid, erucic acid and the like. Can be mentioned.

If the polyhydric alcohol which comprises ester (A) is alcohol more than bivalence, there will be no limitation in particular. Examples of the polyhydric alcohol include aliphatic polyhydric alcohols and aromatic polyhydric alcohols.
Aliphatic polyhydric alcohols include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,4-butanediol, 2-methyl-1,3-propanediol, 1,6-hexanediol, neopentyl glycol, cyclohexane Examples include diol, glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose.
Examples of the aromatic polyhydric alcohol include bisphenol A, bisphenol Z, 1,3,5-trihydroxymethylbenzene and the like.

  Among these, from the viewpoint of fluff reduction due to smoothness and oil film strength, the polyhydric alcohol is preferably a dihydric to tetrahydric alcohol, more preferably a trihydric alcohol, and an aliphatic trihydric alcohol such as glycerin or trimethylolpropane. More preferred is glycerin. In the case of an alcohol having more than four valences, the smoothness is inferior, fluff and yarn breakage increase, and the yarn quality may be lowered.

  The iodine value of the polyhydric alcohol fatty acid ester (A) is preferably 30 to 80, more preferably 35 to 75, and still more preferably 40 to 75. When the iodine value of the ester (A) is less than 30, although the roller dirt can be reduced, the fluff suppressing effect may be insufficient. On the other hand, when the iodine value of ester (A) is more than 80, heat resistance is deteriorated, and as a result, fluff and yarn breakage may be deteriorated. The iodine value in the present invention was measured based on JIS K-0070.

  The acid value of the polyhydric alcohol fatty acid ester (A) is preferably 7 or less, more preferably 5 or less, and still more preferably 3 or less. When the acid value of the ester (A) is more than 7, a large amount of smoke is generated during heat treatment or an odor is generated, which may deteriorate the use environment. The acid value in the present invention was measured based on JIS K-0070.

  The hydroxyl value of the polyhydric alcohol fatty acid ester (A) is preferably from 0.1 to 25, more preferably from 0.5 to 23, and even 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 the ester. On the other hand, when the hydroxyl value of the ester (A) is more than 25, the role of the treating agent as a smoothing agent may be insufficient, and fluff may increase. The hydroxyl value in the present invention was measured based on JIS K-0070.

  500-1200 are preferable, as for the weight average molecular weight of a polyhydric-alcohol fatty acid ester (A), 700-1000 are more preferable, and 800-1000 are more preferable. When the weight average molecular weight is less than 500, the oil film strength may be insufficient, and fluff may increase or smoke generation during heat treatment may increase. On the other hand, when the weight average molecular weight exceeds 1200, smoothness is insufficient and fluff frequently occurs, and not only high-quality fibers cannot be obtained, but also the quality in the weaving or knitting process may be inferior. In addition, the weight average molecular weight in the present invention is a separation column KF-402HQ, KF-403HQ manufactured by Showa Denko KK using a high-speed gel permeation chromatography apparatus HLC-8220GPC manufactured by Tosoh Corporation and a sample concentration of 3 mg / cc. And calculated from the peak measured by the differential refractive index detector.

  As the polyhydric alcohol fatty acid ester (A), those synthesized by a known method using a commercially available fatty acid and polyhydric alcohol may be used. Moreover, in the ester obtained in nature, the ester satisfying the constitution of the polyhydric alcohol fatty acid ester (A) can be used as it is, or the ester obtained from nature can be purified by a known method, if necessary, or further purified. The ester obtained by separating and repurifying the obtained ester by utilizing a difference in melting point by a known method may be used.

[Nonionic surfactant (B)]
The treatment agent of the present invention essentially contains a nonionic surfactant (B) in addition to the ester (A). By using the ester (A) and the nonionic surfactant (B) in combination, the oil film strength of the treatment agent is improved and high yarn-making properties are obtained. 1 type (s) or 2 or more types may be used for a nonionic surfactant (B).

The nonionic surfactant (B) is a polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester and a polyoxyalkylene group-containing hydroxy fatty acid polyhydric acid ester from the viewpoint of improving the oil film strength of the treatment agent and obtaining high yarn production. It is preferable that at least one nonionic surfactant (B1) selected from esters obtained by blocking at least one hydroxyl group of a monohydric alcohol ester with a fatty acid is essential.
Nonionic surfactants other than the nonionic surfactant (B1) include polyoxyalkylene polyhydric alcohol ethers, polyoxyalkylene polyhydric alcohol fatty acid esters, polyoxyalkylene fatty alcohol ethers, polyalkylene glycol fatty acid esters, polyhydric esters Examples include alcohol fatty acid esters.

(Nonionic surfactant (B1))
The weight ratio of the nonionic surfactant (B1) in the entire nonionic surfactant (B) is preferably 5 to 95% by weight, more preferably 8 to 93% by weight, and still more preferably 10 to 91% by weight. When the weight ratio is less than 5% by weight, the oil film strength of the treatment agent may decrease and the fluff may increase, or the stability when the treatment agent is used in an emulsion may be insufficient. On the other hand, when the weight ratio exceeds 95% by weight, the smoothness of the treatment agent may be insufficient, and fluff may increase.

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

The polyoxyalkylene group-containing hydroxy fatty acid has a structure in which a polyoxyalkylene group is bonded to a fatty acid hydrocarbon group via an oxygen atom, and one end that is not bonded to the fatty acid hydrocarbon group of the polyoxyalkylene group is It is a hydroxyl group.
Examples of the polyhydroxyester include an alkylene oxide adduct of an esterified product of a hydroxy fatty acid having 6 to 22 carbon atoms (preferably 16 to 20 carbon atoms) and a polyhydric alcohol.

  Examples of the hydroxy fatty acid having 6 to 22 carbon atoms include hydroxycaprylic acid, hydroxycapric acid, hydroxylauric acid, hydroxystearic acid, and ricinoleic acid, with hydroxyoctadecanoic acid and ricinoleic acid being preferred. Examples of the polyhydric alcohol include ethylene glycol, glycerin, sorbitol, sorbitan, trimethylolpropane, pentaerythritol and the like, and glycerin is preferable. Examples of the alkylene oxide include C2-C4 alkylene oxides such as ethylene oxide, propylene oxide, and butylene oxide.

3-60 are preferable and, as for the addition mole number of alkylene oxide, 8-50 are more preferable. The proportion of ethylene oxide in the alkylene oxide is preferably 50 mol% or more, more preferably 80 mol% or more.
When two or more types of alkylene oxide are added, the order of addition is not particularly limited, and the addition form is block-like,
Any of a random form may be sufficient. The addition of the alkylene oxide can be performed by a known method, but it is generally performed in the presence of a basic catalyst.

  The polyhydroxyester can be produced, for example, by esterifying a polyhydric alcohol and a hydroxy fatty acid (hydroxymonocarboxylic acid) under ordinary conditions to obtain an esterified product, and then adding an alkylene oxide to the esterified product. The polyhydroxyester can be suitably produced also by using an oil and fat obtained from nature such as castor oil or a hardened castor oil obtained by adding hydrogen to this, and further subjecting it to an addition reaction with an alkylene oxide.

  The nonionic surfactant (B1) also includes an ester in which at least one hydroxyl group of the above-mentioned polyhydroxyester is blocked with a fatty acid. 6-24 are preferable and, as for carbon number of the fatty acid to block, 12-18 are more preferable. The carbon number of the hydrocarbon group in the fatty acid may be distributed, the hydrocarbon group may be linear or branched, may be saturated or unsaturated, It may have a polycyclic structure. Examples of such fatty acids include lauric acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, eicosanoic acid, behenic acid, lignoceric acid and the like. There is no limitation in particular about the method of esterification, reaction conditions, etc., A well-known method and normal conditions are employable.

  Examples of the nonionic surfactant (B1) include hydrogenated castor oil ethylene oxide adduct, castor oil ethylene oxide adduct, hydrogenated castor oil ethylene oxide adduct monooleate, hydrogenated castor oil ethylene oxide adduct dioleate, hydrogenated castor oil ethylene oxide adduct trioleate, castor Oiled ethylene oxide adduct trioleate, hydrogenated castor oil ethylene oxide adduct tristearate, castor oil ethylene oxide adduct tristearate, and among these, hardened castor oil ethylene oxide adduct in terms of compatibility of treatment agents, oil film strength, and fluff reduction , Hydrogenated castor oil ethylene oxide adduct trioleate, and hydrogenated castor oil ethylene oxide adduct tristearate are preferred.

(Polyoxyalkylene polyhydric alcohol ether)
The polyoxyalkylene polyhydric alcohol ether is a compound having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide, butylene oxide is added to the polyhydric alcohol.
Examples of the polyhydric alcohol include ethylene glycol, glycerin, trimethylolpropane, pentaerythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose. Of these, glycerin, trimethylolpropane, and sucrose are preferable.

As addition mole number of alkylene oxide, 3-100 are preferable, 4-70 are more preferable, and 5-50 are more preferable. The proportion of ethylene oxide in the alkylene oxide is preferably 50 mol% or more, and more preferably 80 mol% or more.
300-10000 are preferable, as for the weight average molecular weight of polyoxyalkylene polyhydric alcohol ether, 400-8000 are more preferable, and 500-5000 are more preferable. When the molecular weight is less than 300, the occurrence of fuzz and yarn breakage may not be reduced. On the other hand, when the molecular weight exceeds 10,000, the friction of the treatment agent becomes high, and not only the generation of fluff and yarn breakage cannot be reduced, but also it may deteriorate.

  Polyoxyalkylene polyhydric alcohol ethers include polyethylene glycol, glycerin ethylene oxide adduct, trimethylolpropane ethylene oxide adduct, pentaerythritol ethylene oxide adduct, diglycerin ethylene oxide adduct, sorbitan ethylene oxide adduct, sorbitan ethylene oxide propylene oxide adduct, sorbitol Examples thereof include, but are not limited to, an ethylene oxide adduct, a sorbitol ethylene oxide propylene oxide adduct, a ditrimethylolpropane ethylene oxide adduct, a dipentaerythritol ethylene oxide adduct, and a sucrose ethylene oxide adduct.

(Polyoxyalkylene polyhydric alcohol fatty acid ester)
A polyoxyalkylene polyhydric alcohol fatty acid ester is a compound having a structure in which a compound obtained by adding an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide to a polyhydric alcohol and a fatty acid are ester-bonded.
Examples of the polyhydric alcohol include glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose. Among these, polyethylene glycol, glycerin, diglycerin, sorbitan, and sorbitol are preferable.

  Examples of fatty acids include lauric acid, myristic acid, myristic acid, palmitic acid, palmitoleic acid, isocetyl acid, stearic acid, isostearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachidic acid, eicosenoic acid, behenic acid, Examples include isodocosanoic acid, erucic acid, lignoceric acid, and isotetradocosanoic acid.

As addition mole number of alkylene oxide, 3-100 are preferable, 5-70 are more preferable, and 10-50 are more preferable. The proportion of ethylene oxide in the alkylene oxide is preferably 50 mol% or more, and more preferably 80 mol% or more.
300-7000 are preferable, as for the weight average molecular weight of polyoxyalkylene polyhydric alcohol fatty acid ester, 500-5000 are more preferable, and 700-3000 are more preferable. When the molecular weight is less than 300, smoke may be generated in the heat treatment process, which may deteriorate the environment. In addition, occurrence of yarn breakage may not be reduced. On the other hand, when the molecular weight exceeds 7000, the friction of the treatment agent becomes high, and not only the generation of fluff and yarn breakage cannot be reduced, but also it may deteriorate.

  Examples of polyoxyalkylene polyhydric alcohol fatty acid esters include glycerin ethylene oxide adduct monolaurate, glycerin ethylene oxide adduct dilaurate, glycerin ethylene oxide adduct trilaurate, trimethylolpropane ethylene oxide adduct trilaurate, sorbitan ethylene oxide adduct monooleate, sorbitan ethylene oxide adduct dioleate Sorbitan ethylene oxide adduct trioleate, sorbitan ethylene oxide propylene oxide adduct monooleate, sorbitan ethylene oxide propylene oxide adduct dioleate, sorbitan ethylene oxide propylene oxide adduct trioleate, sorbitan ethylene oxide propylene oxide adduct trilaurate, It includes sugar ethylene oxide adducts Toriraureto like, but is not limited thereto.

(Polyoxyalkylene aliphatic alcohol ether)
The polyoxyalkylene aliphatic alcohol ether is 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 polyoxyalkylene aliphatic alcohol ethers include alkylene oxides of aliphatic alcohols such as octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, and oleyl alcohol. Addenda may be mentioned.
As addition mole number of alkylene oxide, 1-100 mol is preferable, 2-70 mol is more preferable, and 3-50 mol is further more preferable. Further, the ratio of ethylene oxide to the whole alkylene oxide is preferably 20 mol% or more, more preferably 30 mol% or more, and further preferably 40 mol% or more.

(Fatty acid ester of polyalkylene glycol)
The fatty acid ester of polyalkylene glycol is a compound having a structure in which polyoxyethylene glycol, polyoxyethylene polyoxypropylene glycol, and a fatty acid are ester-bonded. 100-1000 are preferable, as for the weight average molecular weight of polyalkylene glycol, 150-800 are more preferable, and 200-700 are more preferable.

  Polyalkylene glycol fatty acid esters include polyethylene glycol monolaurate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol dioleate, polyethylene glycol monostearate, polyethylene glycol distearate, polyethylene polypropylene glycol monolaurate, polyethylene Examples thereof include, but are not limited to, polypropylene glycol dilaurate, polyethylene polypropylene glycol monooleate, and polyethylene polypropylene glycol dioleate.

(Polyhydric alcohol fatty acid ester)
The polyhydric alcohol fatty acid ester is a compound having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and is a compound excluding the polyhydric alcohol fatty acid ester (A).
Examples of the polyhydric alcohol include ethylene glycol, tyrolpropane, pentaerythritol, erythritol, diethylene glycol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, and sucrose. Among these, ethylene glycol, glycerin, diglycerin, sorbitan, and sorbitol are preferable.

  Examples of fatty acids include lauric acid, myristic acid, myristic acid, palmitic acid, palmitoleic acid, isocetyl stearic acid, isostearic acid, oleic acid, elaidic acid, linoleic acid, linolenic acid, tuberculostearic acid, isoicosanoic acid, gadoleic acid Eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid and the like.

The polyhydric alcohol fatty acid ester has at least one or two or more hydroxyl groups.
100-1000 are preferable, as for the weight average molecular weight of a polyhydric-alcohol fatty acid ester, 200-800 are more preferable, and 300-600 are more preferable.

  Examples of fatty acid esters include glycerol monolaurate, glycerol dilaurate, glycerol monooleate, glycerol dioleate, sorbitan monooleate, sorbitan dioleate, sucrose monolaurate, and sucrose dilaurate. It is not limited to.

[Treatment agent for synthetic fibers]
The synthetic fiber treating agent of the present invention essentially contains the polyhydric alcohol fatty acid ester (A) and the nonionic surfactant (B). 10 to 70 weight% is preferable, as for the weight ratio of the polyhydric alcohol fatty acid ester (A) to the non volatile matter of a processing agent, 13 to 67 weight% is more preferable, and 15 to 65 weight% is further more preferable. When the weight ratio is less than 10% by weight, the generation of fluff may not be sufficiently reduced. On the other hand, when the weight ratio is more than 70% by weight, the fiber convergence may be deteriorated or the fluff may increase. The non-volatile content in the present invention refers to an absolutely dry component when the treatment agent is heat treated at 105 ° C. to remove the solvent and the like and reach a constant weight.

  15 to 65 weight% is preferable, as for the weight ratio of nonionic surfactant (B) to a processing agent, 20 to 63 weight% is more preferable, and 25 to 60 weight% is further more preferable. When this weight ratio is less than 15 weight%, the oil film strength of a processing agent may fall and fluff may increase. On the other hand, when the weight ratio is more than 65% by weight, the amount of the ester component used is decreased, the smoothness is insufficient, and the fluff may increase.

  From the viewpoint of more exerting the effects of the present invention, the total weight ratio of the polyhydric alcohol fatty acid ester (A) and the nonionic surfactant (B) in the treatment agent is preferably 30% by weight or more, and 35% by weight or more. More preferred is 40% by weight or more.

(Other ingredients)
The treatment agent for synthetic fibers of the present invention is for emulsification of the treatment agent, assisting adhesion to the fiber, washing the treatment agent from the fiber with water, antistatic property to the fiber, lubricity, imparting convergence, etc. You may contain surfactant other than said nonionic surfactant (B). Examples of such surfactants include anionic surfactants such as metal salts or amine salts of alkyl phosphates, metal salts or amine salts of polyoxyethylene alkyl phosphates, alkane sulfonates, fatty acid soaps; Examples include cationic surfactants such as imidazolinium salts and quaternary ammonium salts; amphoteric surfactants such as lauryl dimethyl betaine and stearyl dimethyl betaine. These surfactants may be used alone or in combination of two or more. The weight ratio of the surfactant in the non-volatile content of the treatment agent in the case of containing these surfactants is not particularly limited, but is preferably 0.01 to 15% by weight, more preferably 0.1 to 10% by weight. . In addition, a surfactant here means a thing with a weight average molecular weight of less than 1000.

  Moreover, the processing agent for synthetic fibers of this invention may further contain alkane sulfonate from the point which improves heat resistance. Examples of the alkane sulfonate include alkane sulfonates represented by the formula [I] described in JP-A-8-120564. One or more alkane sulfonates may be used in combination. The weight ratio of the alkane sulfonate to the non-volatile content of the treatment agent in the case of containing the alkane sulfonate is not particularly limited, but is preferably 0.5 to 5.0% by weight, and preferably 1.5 to 4.0. % By weight is preferred.

  Moreover, in order to provide heat resistance, the processing agent for synthetic fibers of this invention may contain antioxidant further. Examples of the antioxidant include known ones such as phenol, thio, and phosphite. One or two or more antioxidants may be used in combination. Although the weight ratio of the antioxidant in the non-volatile content of the treatment agent in the case of containing the antioxidant is not particularly limited, it is preferably 0.1 to 5% by weight, and more preferably 0.1 to 3% by weight.

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

Moreover, the processing agent for synthetic fibers of this invention may contain the diester compound of thiodipropionic acid and an aliphatic alcohol in the range which does not inhibit the effect of this invention.
A 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 increased. You may use 1 type, or 2 or more types. 400-1000 are preferable, as for the molecular weight of the thiodipropionic acid which comprises this diester compound, 500-900 are more preferable, and 600-800 are more preferable. The aliphatic alcohol constituting the diester compound may be saturated or unsaturated. The aliphatic alcohol may be linear or have a branched structure, but preferably has a branched structure. 8-24 are preferable, as for carbon number of an aliphatic alcohol, 12-24 are more preferable, and 16-24 are more preferable. Examples of the aliphatic alcohol include octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, isocetyl alcohol, oleyl alcohol, and isostearyl alcohol. Among these, oleyl alcohol and isostearyl alcohol are exemplified. preferable.

The treatment agent for synthetic fibers of the present invention may be composed of the above-mentioned components consisting only of a non-volatile content, may be composed of a non-volatile content and a stock solution stabilizer, and the non-volatile content is diluted with a low-viscosity mineral oil. It may be a water-based emulsion obtained by emulsifying nonvolatile components in water. When the processing agent for synthetic fibers of the present invention is an aqueous emulsion obtained by emulsifying a nonvolatile content in water, the concentration of the nonvolatile content is preferably 5 to 35% by weight, and more preferably 6 to 30% by weight. The viscosity of the treatment agent and the non-volatile content was diluted with a low viscosity mineral oil (30 ° C.), from the viewpoint of uniformly applied to the fiber material, preferably 3~120mm ² / s, more preferably 5 to 100 mm ² / s.

  There is no limitation in particular about the manufacturing method of the processing agent for synthetic fibers of this invention, A well-known method is employable. The treating agent for synthetic fiber is produced by adding and mixing the above-mentioned respective components constituting in any or specific order.

[Method for producing synthetic fiber filament yarn and fiber structure]
The method for producing a synthetic fiber filament yarn of the present invention includes a step of applying the synthetic fiber treating agent of the present invention to a raw material synthetic fiber filament yarn. There is no restriction | limiting in particular as a process to provide, A well-known method is employable. Usually, a synthetic fiber treating agent is applied in the spinning process of the raw synthetic fiber filament yarn. After the treatment agent is applied, stretching and heat setting are performed by a heat roller, and the film is wound up. Thus, after providing a processing agent, when it has the process of heat-drawing, without being wound up once, the processing agent for synthetic fibers of this invention can be used conveniently. As an example of the temperature at the time of hot drawing, in polyester and nylon, 210 to 260 ° C. is assumed for industrial materials, and 110 to 180 ° C. is assumed for clothing.
As described above, the synthetic fiber treatment agent applied to the raw material synthetic fiber filament yarn is a treatment agent consisting of only the non-volatile content, a treatment agent obtained by diluting the non-volatile content with low-viscosity mineral oil, or emulsifying the non-volatile content in water. And water-based emulsion treatment agents. Although it does not specifically limit as an application method, Guide oil supply, roller oil supply, dip oil supply, spray oil supply, etc. are mentioned. Among these, guide oil supply and roller oil supply are preferable because of easy management of the applied amount.

  The applied amount of the non-volatile content of the treating agent for synthetic fibers is preferably 0.05 to 5% by weight, more preferably 0.1 to 3% by weight, and 0.1 to 2% by weight with respect to the raw material synthetic fiber filament yarn. % Is more preferable. If it is less than 0.05% by weight, the effects of the present invention may not be exhibited. On the other hand, if it exceeds 5% by weight, the non-volatile content of the treatment agent tends to fall off the yarn path, the tar on the heat roller increases significantly, and may lead to fluff and yarn breakage.

  (Raw material) Synthetic fiber filament yarns include filament yarns of synthetic fibers such as polyester fibers, polyamide fibers, and polyolefin fibers. The treatment agent for synthetic fibers of the present invention is suitable for synthetic fibers such as polyester fibers, polyamide fibers, and polyolefin fibers. As the polyester fiber, polyester (PET) having ethylene terephthalate as a main constituent unit, polyester (PTT) having trimethylene ethylene terephthalate as a main constituent unit, polyester (PBT) having main constituent unit of butylene ethylene terephthalate, and lactic acid are mainly used. Examples thereof include polyester (PLA) as a structural unit, examples of polyamide fibers include nylon 6 and nylon 66, and examples of polyolefin fibers include polypropylene and polyethylene. There is no limitation in particular as a manufacturing method of a synthetic fiber filament yarn, A well-known method is employable.

(Fiber structure)
The fiber structure of the present invention includes the synthetic fiber filament yarn obtained by the production method of the present invention. Specifically, a fabric woven by a water jet loom, an air jet loom, or a rapier loom using a synthetic fiber filament yarn provided with the synthetic fiber treatment agent of the present invention, and a circular knitting machine, a warp knitting machine, Or it is the knitted fabric knitted with the weft knitting machine. Examples of the use of the fiber structure include industrial materials such as tire cords, seat belts, airbags, fish nets, ropes, and clothing. There is no limitation in particular as a method of manufacturing a textile fabric and a knitted fabric, A well-known method is employable.

  The present invention will be described below with reference to examples, but the present invention is not limited to the examples described herein. In the text and tables, “%” means “% by weight”.

[Examples 1-9, Comparative Examples 1-9]
(Treatment agents of Examples 1, 7, 9 and Comparative Examples 1 and 2)
The components described in Tables 4 and 5 were mixed and stirred until uniform to prepare a treatment 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 concentration of 70% by weight.
(Treatment agents of 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 treatment agent. The prepared treating agent was gradually added to ion-exchanged water with stirring. After the addition, the mixture was stirred for 60 minutes until it became uniform to prepare a treatment agent (O / W emulsion state) having a nonvolatile content concentration of 18% by weight.

  Using each treatment agent prepared above, roller dirt, fluff, and thread breakage were evaluated by the following methods. In addition, the number in Tables 4-6 shows the weight part of the non volatile matter of a processing agent. The details of the esters (A) and esters in Tables 4 to 6 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 fatty acid constituting the ester, the polyhydric alcohol constituting the ester (Gly: glycerin, TMP: trimethylolpropane, PE: pentaerythritol), the iodine value of the ester, the hydroxyl value, the acid value, It shows the weight average molecular weight. As the ester, a generally commercially available ester obtained by purifying an ester obtained from nature by a known method, or separating and repurifying the further purified ester using a difference in melting point by a known method ( Ester (A-1, A-2, X-1, X-8) or synthesized by a known method using a commercially available fatty acid and polyhydric alcohol (ester) A-3 to A-8, X-2 to X-7, X-9) were used. Although the example using the synthesis method is given below, the preparation method is not limited to this. In Tables 1 and 2, the number after C indicates the number of carbon atoms of the fatty acid, and the number after F indicates the number of double bonds in the fatty acid.

  Seisei glycerin 9.8 parts, linoleic acid (Nippon oil linoleic acid 90) 13.5 parts, oleic acid (NOF NAA-34) 36.1 parts, stearic acid (NOF NAA-180) 40.6 Parts were mixed and 1.0 part of paratoluenesulfonic acid was mixed as a reaction catalyst. Under a nitrogen stream, the temperature was raised to 210 ° C. and reacted for 1 hour. Subsequently, the temperature was raised to 250 ° C. and reacted 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 dirt)
For the 1000 denier, 96 filament oil-free polyester filament (raw yarn), using the guide oiling method, the treatment agent prepared above was applied so that the nonvolatile content was 0.6% by weight, The sample was left in an atmosphere of 25 ° C. and 65% humidity for 48 hours to adjust the humidity.
The conditioned yarn is brought into contact with a 250 ° C. friction body (satin chrome plating, diameter 5 cm) with a running yarn friction tester (manufactured by Toray Engineering Co., Ltd.), and the yarn is loaded at a load of 500 g and a running speed of 200 m / min. Was run for 24 hours, and the dirt adhered to the friction body was determined under the following conditions to evaluate the roller dirt. The results are shown in Tables 4 and 5.
○: Tar products are not observed or very little.
X: Remarkable tar product is recognized.

(Thread breakage, fluff)
In the melt spinning process, the treatment agent prepared above is applied to the yarn obtained by melt spinning and cooling and solidifying the polyester polymer using the guide oiling method so that the applied amount of nonvolatile content is 0.6% by weight. did.
The yarn to which the treatment agent was applied was continuously stretched without being wound once, and was stretched 5.1 times through a hot roller at 250 ° C. to obtain a 1000 denier, 96 filament polyethylene terephthalate multifilament. . The drawn and heat-set yarns are wound up, but the yarns are interlaced immediately before the winding to converge the filaments. Interlacing was performed by blowing a high pressure fluid, such as high pressure air, through a nozzle. The fuzz and the yarn breakage were evaluated under the following conditions. The results are shown in Tables 4 and 5.
Thread breakage: Each treatment agent was evaluated based on the number of yarn breaks per ton of the raw yarn.
Fluff: Each treatment-agent-attached yarn was checked for fluff count with a fluff counter, and the case where the value per million m was less than 1 was marked with ◯, and one or more was marked with x.

[Examples 10-13, Comparative Examples 10-14]
The components described in Table 6 were mixed and stirred until uniform to prepare a treatment agent. The prepared treating agent was gradually added to ion-exchanged water with stirring. After the addition, the mixture was stirred for 60 minutes until it became uniform to prepare a treatment agent (O / W emulsion state) having a nonvolatile content concentration of 16% by weight. Using the prepared treatment agent, roller dirt, fluff, and thread breakage were evaluated by the following method.

(Roller dirt)
For the 75 denier, 36 filament oil-free polyester filament (raw yarn), using the nozzle oiling method, the treatment agent prepared above was applied so that the applied amount of nonvolatile content was 0.7% by weight, The sample was left in an atmosphere of 25 ° C. and 65% humidity for 48 hours to adjust the humidity.
The conditioned yarn is brought into contact with a 150 ° C. friction body (pear-finished chrome plating, diameter 5 cm) with a running yarn friction tester (manufactured by Toray Engineering Co., Ltd.), and the yarn is loaded at a load of 20 g and a running yarn speed of 200 m / min. Was run for 24 hours, and the dirt adhered to the friction body was determined under the following conditions to evaluate the roller dirt. The results are shown in Table 6.
○: Tar products are not observed or very little.
X: Remarkable tar product is recognized.

(Thread breakage, fluff)
In the melt spinning process, the processing agent prepared above is applied to the yarn obtained by melt spinning and cooling and solidifying the polyester polymer using the nozzle oiling method so that the non-volatile content is 0.7% by weight. did.
The yarn to which the treatment agent was applied was continuously stretched without being wound once, and was stretched 2.6 times through a 150 ° C. hot roller to obtain a 75 denier, 36 filament polyethylene terephthalate multifilament. . The drawn and heat-set yarns are wound up, but the yarns are interlaced immediately before the winding to converge the filaments. Interlacing was performed by blowing a high pressure fluid, such as high pressure air, through a nozzle. Table 6 shows the results of evaluation of fuzz and yarn breakage under the following conditions.
Thread breakage: Each treatment agent was evaluated based on the number of yarn breaks per ton of the raw yarn.
Fluff: Each treatment-agent-attached yarn was checked for fluff count with a fluff counter, and the case where the value per million m was less than 1 was marked with ◯, and one or more was marked with x.

  As can be seen from Tables 4 to 6, in Examples 1 to 13 of the present invention, the occurrence of yarn breakage and fluff was significantly reduced. Furthermore, there is little roller dirt, it is excellent in heat resistance, and the production environment is not deteriorated. On the other hand, Comparative Examples 1 to 14 are inferior in at least one of yarn breakage evaluation, fluff evaluation, and roller evaluation, and none of these evaluations can be satisfied.

  The synthetic fiber treating agent of the present invention is suitable for synthetic fiber filament yarns used for industrial materials such as tarpaulins, tire cords, seat belts, airbags, fish nets, ropes, and clothing such as fabrics and knitting.

Claims (10)

Essentially contains a polyhydric alcohol fatty acid ester (A) having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, and a nonionic surfactant (B),
The fatty acid contains linoleic acid and a fatty acid having 14 to 22 carbon atoms excluding linoleic acid,
A treating agent for synthetic fibers, wherein the proportion of linoleic acid in the total fatty acid is 5 to 20% by weight, and the total weight proportion of linoleic acid and a fatty acid having 14 to 22 carbon atoms excluding linoleic acid is 95% by weight or more.   The weight ratio of the said ester (A) to the non volatile matter of a processing agent is 10 to 70 weight%, The weight ratio of the said nonionic surfactant (B) is 15 to 65 weight%. Processing agent.   The processing agent according to claim 1 or 2, wherein the polyhydric alcohol is a trihydric alcohol.   The processing agent in any one of Claims 1-3 whose iodine value of the said ester (A) is 30-80.   The processing agent in any one of Claims 1-4 whose weight average molecular weights of the said ester (A) are 500-1200.   The nonionic surfactant (B) is at least one nonionic surfactant selected from a polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol ester and an ester obtained by blocking at least one hydroxyl group of the polyhydric alcohol ester with a fatty acid ( The processing agent in any one of Claims 1-5 containing B1).   The processing agent in any one of Claims 1-6 whose weight ratio of the said nonionic surfactant (B1) to the said nonionic surfactant (B) whole is 5-95 weight%.   A synthetic fiber filament yarn obtained by applying the treatment agent according to any one of claims 1 to 7 to a raw material synthetic fiber filament yarn.   The manufacturing method of a synthetic fiber filament yarn including the process of providing the processing agent in any one of Claims 1-7 to a raw material synthetic fiber filament yarn.   A fiber structure comprising the synthetic fiber filament yarn according to claim 8 and / or the synthetic fiber filament yarn obtained by the production method according to claim 9.