JPWO2015068671A1 - 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 can reduce fluff and yarn breakage by suppressing fluctuations in yarn-making properties due to temperature changes such as seasonal factors. The treating agent for synthetic fibers of the present invention includes an ester component (A) having a structure in which glycerin and a linear fatty acid are ester-bonded, an ester component (B1) having a structure in which polyglycerin and a fatty acid are ester-bonded, and sucrose. And at least one ester component (B) selected from ester components (B2) having a structure in which a fatty acid is ester-bonded, and the linear fatty acid has 14 to 14 carbon atoms excluding linoleic acid and linoleic acid 22 linear fatty acids, the proportion of linoleic acid in the total linear fatty acids is 5 to 20% by weight, and the total weight proportion of linoleic acid and linear fatty acids having 14 to 22 carbon atoms excluding linoleic acid Is 95 wt% or more, and the ester component (B2) is a compound having 3 or more ester groups in the molecule.

Description

  The present invention relates to a treatment agent for synthetic fibers and use thereof. More specifically, a synthetic fiber treatment agent used when producing a synthetic fiber multifilament yarn, a synthetic fiber filament yarn provided with the treatment agent, and a synthetic fiber filament yarn production method using the treatment agent And a fiber structure including the synthetic fiber filament yarn.

  Conventionally, mineral oil, esters of monohydric alcohol and fatty acid, and esters of polyhydric alcohol and fatty acid have been used as lubricants for treating agents for synthetic fibers (for example, Patent Document 1). In recent years, it has been pointed out that the working environment is deteriorated due to fuming of low molecular components such as mineral oil and esters of monohydric alcohol and fatty acid due to high temperature and multi-strand heat treatment. In order to solve this problem, the use of polyhydric alcohols and fatty acid esters is increasing. Among them, the use of polyhydric alcohol fatty acid esters such as natural ingredients is increasing due to environmental measures.

  On the other hand, with the increase in the use of polyhydric alcohol fatty acid esters such as natural raw material components, there is a problem that the processing agent components are solidified at low temperatures due to seasonal factors. When a treatment agent with solidified components is emulsified in water, the solidified component becomes insoluble in water, making it difficult to uniformly attach the treatment agent to the yarn during yarn production, causing fluff and yarn breakage, This leads to a decrease in the rate and poor weaving and knitting in the post-processing process. Therefore, conventional synthetic fiber treatment agents have a problem in that the yarn-making properties such as fluff and yarn breakage fluctuate due to temperature changes such as seasonal factors.

Japanese Patent Laid-Open No. 3-97961

  An object of the present invention is to suppress a change in yarn-making property due to a temperature change such as a seasonal factor to reduce fluff and yarn breakage, and a synthetic fiber filament yarn provided with the treatment agent. And a method for producing a synthetic fiber filament yarn using the treatment agent, and a fiber structure including the synthetic fiber filament yarn.

  As a result of intensive studies to solve the above problems, the present inventors have found that the treatment agent for synthetic fibers contains a specific ester component (A) and a specific ester component (B). The present invention has been found.

  That is, the treating agent for synthetic fibers of the present invention comprises an ester component (A) having a structure in which glycerin and a linear fatty acid are ester-bonded, an ester component (B1) having a structure in which polyglycerin and a fatty acid are ester-bonded, and Containing at least one ester component (B) selected from ester components (B2) having a structure in which sucrose and a fatty acid are ester-bonded, and the linear fatty acid contains linoleic acid and carbon number excluding linoleic acid 14 to 22 linear fatty acids, the proportion of linoleic acid in the total linear fatty acids is 5 to 20% by weight, and the total of linoleic acid and linear fatty acids having 14 to 22 carbon atoms excluding linoleic acid The weight ratio is 95% by weight or more, and the ester component (B2) is a compound having 3 or more ester groups in the molecule.

  Examples of the ester component (B) include the ester component (B1), the ester component (B2), and the ester component (B1) and the ester component (B2).

  When the ester component (A) is 100 parts by weight, the proportion of the ester component (B) is preferably 0.0001 to 10 parts by weight.

  The proportion by weight of the ester component (A) in the nonvolatile content of the treatment agent is preferably 10 to 70% by weight.

  The weight ratio of linolenic acid in the whole linear fatty acid is preferably 2% by weight or less.

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

The ester component (B1) preferably has a weight average molecular weight of 1100 to 20000. The ester component (B2) preferably has a weight average molecular weight of 1100 to 6500.
The ester component (B2) preferably has a hydroxyl value of 300 or less.
The treatment agent of the present invention preferably further contains a nonionic surfactant.

  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 above synthetic fiber filament yarn and / or the synthetic fiber filament yarn obtained by the above production method.

  If the processing agent for synthetic fibers of this invention is used, the fluctuation | variation of the spinning property by temperature changes, such as a seasonal factor, can be suppressed, and fluff and thread breakage can be reduced. According to the production method of the present invention, it is possible to obtain a synthetic fiber filament yarn in which fluctuations in yarn-making properties due to temperature changes such as seasonal factors are suppressed and fluff and yarn breakage are reduced. The fiber structure of the present invention is excellent in quality.

  The processing agent for synthetic fibers of this invention contains a specific ester component (A) and a specific ester component (B) essential. Details will be described below.

[Ester component (A)]
The ester component (A) is an essential component of the treatment agent of the present invention, and is an ester having a structure in which glycerin and a linear fatty acid are ester-bonded. When an ester having a structure in which a monohydric alcohol and a fatty acid are ester-bonded is used in place of the ester component (A), the smoothness is excellent, but smoke generation during heat treatment is increased and the working environment is deteriorated. 1 type (s) or 2 or more types may be used for an ester component (A). Further, when an ester having a structure in which glycerin and a branched fatty acid are ester-bonded is used, smoothness is insufficient and fluff increases. The ester component (A) is a compound having no polyoxyalkylene group in the molecule.

  The straight chain fatty acid constituting the ester component (A) refers to an aliphatic monocarboxylic acid having a straight chain carbon skeleton. The straight-chain fatty acid may also contain a hydroxy fatty acid, but if the hydroxy fatty acid is contained, the role of the treating agent as a smoothing agent is insufficient, and therefore it is preferable that no hydroxy fatty acid is contained.

  The linear fatty acid constituting the ester component (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 linoleic acid occupies the whole linear fatty 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 linear fatty acid is substantially composed of linoleic acid and fatty acid (a).

  The proportion of linoleic acid in the whole linear fatty acid is 5 to 20% by weight, more preferably 6 to 19% by weight, and still 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 proportion of the linear fatty acid (a) in the whole linear 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 proportion is less than 75% by weight, the oil film strength of the ester 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.

  Further, the total weight ratio of linoleic acid and linear fatty acid (a) in the whole linear 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 weight ratio of linolenic acid in the whole linear fatty acid is preferably 2% by weight or less, more preferably 1% by weight or less, further preferably 0.5% by weight or less, and particularly preferably 0% by weight. When the weight ratio is more than 2% by weight, the heat resistance of the treatment agent is deteriorated and roller dirt is generated. As a result, there is a possibility that fluff and yarn breakage may occur.

  The straight chain fatty acid (a) may be a saturated fatty acid or an unsaturated fatty acid. The linear fatty acid (a) has 14 to 22 carbon atoms, 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 linear fatty acid (a) include myristic acid, myristoleic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, elaidic acid, linolenic acid, eicosenoic acid, behenic acid, erucic acid and the like.

  From the standpoint of further exerting the effects of the present invention, the freezing point of the ester component (A) is preferably −10 ° C. or higher, preferably −10 to 15 ° C., more preferably −10 to 10 ° C. When the freezing point is less than −10 ° C., it may not be necessary to use the ester component (B) in combination. The freezing point in the present invention is a differential scanning calorimeter (DSC), and the sample is heated to 50 ° C. and isothermal for 1 minute, then cooled to −60 ° C. at 10 ° C./min and isothermal for 8 minutes. The temperature of the peak with the highest endotherm among the endothermic peaks of the DSC curve obtained when it is solidified and then raised to 50 ° C. at 10 ° C./min.

  30-80 are preferable, as for the iodine value of an ester component (A), 35-75 are more preferable, and 40-75 are more preferable. When the iodine value is less than 30, the freezing point of the ester component (A) is high, and even if the ester component (B) is used, it is easy to solidify at a low temperature and the effects of the present invention are hardly obtained. On the other hand, when the iodine value is more than 80, heat resistance is deteriorated, and as a result, fluff and yarn breakage may be deteriorated. In addition, the iodine value in this invention says the value measured based on JISK-0070.

  The acid value of the ester component (A) is preferably 7 or less, more preferably 5 or less, and even more preferably 3 or less. When the acid value of the ester component (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.

  0.1-25 are preferable, as for the hydroxyl value of an ester component (A), 0.5-23 are more preferable, and 1.0-20 are more preferable. When the hydroxyl value of the ester component (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 component (A) is greater 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 an ester component (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.

  For the ester component (A), natural esters obtained from nature such as natural seeds and flowers can be purified by a known method, and further purified esters can be separated and re-purified using a melting point difference by a known method. Can be obtained. Examples of natural esters include linseed oil, sunflower oil, soybean oil, rapeseed oil, sesame oil, olive oil, palm kernel oil, palm oil, coconut oil and the like. Among these, olive oil and palm oil are preferable and palm oil is more preferable in order to obtain the target glycerin ester compound with a high yield.

[Ester component (B)]
The ester component (B) is an essential component of the treatment agent of the present invention, and the ester component (B1) and sucrose having a structure in which polyglycerol and a fatty acid (hereinafter sometimes referred to as fatty acid (b1)) are ester-bonded. And at least one selected from ester components (B2) having a structure in which a fatty acid (hereinafter sometimes referred to as fatty acid (b2)) is ester-bonded. The ester component (B2) is a compound having 3 or more ester groups in the molecule. By using the ester component (B) in addition to the ester component (A), it is possible to suppress fluctuations in yarn production due to temperature changes such as seasonal factors, and to reduce fluff and yarn breakage. 1 type (s) or 2 or more types may be used for an ester component (B).

The ester component (B1) is an ester having a structure in which polyglycerol and fatty acid (b1) are ester-bonded. The term “polyglycerol” as used herein means an average polymerization degree of 3 mol or more, and an average polymerization degree of less than 3 is not included in the polyglycerol. The ester component (B1) is a compound that does not have a polyoxyalkylene group in the molecule. 1 type (s) or 2 or more types may be used for an ester component (B1).
4-60 are preferable, as for the average polymerization degree of the polyglycerol which comprises an ester component (B1), 4-45, 5-20 are preferable, 6-19 are more preferable, and 7-18 are more preferable. When the average degree of polymerization is more than 60, the solubility in the treatment agent may be lowered. On the other hand, when the average degree of polymerization is less than 4, the effect of the present invention may not be exhibited.

The fatty acid (b1) constituting the ester component (B1) may be either a saturated fatty acid or an unsaturated fatty acid. 4-24 are preferable, as for carbon number of the said fatty acid (b1), 6-22 are more preferable, and 8-22 are more preferable. When the carbon number is less than 4 or more than 24, the effects of the present invention may not be exhibited.
Examples of the fatty acid (b1) include butyric acid, valeric acid, caproic acid, heptyl acid, caprylic acid, capric acid, lauric acid, myristic acid, myristoleic acid, palmitic acid, palmitoleic acid, isocetylic acid, stearic acid, and isostearic acid. Examples include acids, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachidic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid, isotetradocosanoic acid and the like.

  As for the weight average molecular weight of an ester component (B1), 1100-20000 are preferable, and 1250-16000, 1500-15000, 1500-7500, 1800-7200, 2000-7000 are preferable in order. When the weight average molecular weight is less than 1100, the effects of the present invention may not be exhibited. On the other hand, when the weight average molecular weight is more than 20000, the solubility in the treatment agent may be lowered.

  From the point which demonstrates the effect of this invention more, 10-100 are preferable, as for the iodine value of an ester component (B1), 15-95 are more preferable, and 20-90 are more preferable.

  In view of more exerting the effects of the present invention, the hydroxyl value of the ester component (B1) is preferably 200 or less, more preferably 5 to 180, and still more preferably 10 to 160.

  From the viewpoint of further exerting the effects of the present invention, the esterification rate of the ester component (B1) is preferably 50 mol% or more, more preferably 55 to 98 mol%, further preferably 60 to 95 mol%. When the esterification rate of the ester component (B) is less than 50 mol%, the solubility in the treating agent may be lowered. In addition, the esterification rate in this invention means the ratio esterified with the fatty acid with respect to all the hydroxyl groups of polyglycerol or sucrose.

  From the point which exhibits the effect of this invention more, 10 or less are preferable, as for HLB of an ester component (B1), 0.5-8 are more preferable, and 1-7 are more preferable. Here, HLB is an abbreviation for Hydrophilic Lipophilic Balance and serves as an index for knowing whether an emulsifier is hydrophilic or lipophilic. The larger the value, the stronger the hydrophilicity. The HLB in the present invention can be experimentally determined by the atlas method proposed by Griffin et al.

The ester component (B2) is an essential component of the treatment agent of the present invention and is an ester having a structure in which sucrose, which is an octavalent alcohol, and a fatty acid (b2) are ester-bonded, and 3 or more in the molecule It is a compound having an ester group. When the number of ester groups is less than 3, the effect of the present invention cannot be exhibited. The ester component (B2) is a compound that does not have a polyoxyalkylene group in the molecule. 1 type (s) or 2 or more types may be used for an ester component (B2).
From the viewpoint of exerting the effects of the present invention, the number of ester groups in the molecule of the ester component (B2) is more preferably 4-8, and even more preferably 5-7.

The fatty acid (b2) constituting the ester component (B2) may be either a saturated fatty acid or an unsaturated fatty acid. 4-24 are preferable, as for carbon number of the said fatty acid (b2), 6-22 are more preferable, and 8-22 are more preferable. When the carbon number is less than 4 or more than 24, the effects of the present invention may not be exhibited.
Examples of the fatty acid (b2) include butyric acid, valeric acid, caproic acid, heptyl acid, caprylic acid, capric acid, lauric acid, myristic acid, myristoleic acid, palmitic acid, palmitoleic acid, isocetylic acid, stearic acid, and isostearic acid. Examples include acids, oleic acid, elaidic acid, linoleic acid, linolenic acid, arachidic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid, isotetradocosanoic acid and the like.

  1100-6500 are preferable, as for the weight average molecular weight of an ester component (B2), 1150-4000 are more preferable, and 1200-3500 are more preferable. When the weight average molecular weight is less than 1100, the effects of the present invention may not be exhibited. On the other hand, when the weight average molecular weight exceeds 6500, the solubility in a treating agent may be lowered.

  From the viewpoint of further exerting the effects of the present invention, the iodine value of the ester component (B2) is preferably 90 or less, more preferably 75 or less, and even more preferably 60 or less.

  In view of further exerting the effects of the present invention, the hydroxyl value of the ester component (B2) is preferably 300 or less, more preferably 10 to 250, and still more preferably 20 to 200.

  From the viewpoint of further exerting the effect of the present invention, the esterification rate of the ester component (B2) is preferably 40 mol% or more, more preferably 45 to 98 mol%, further preferably 50 to 95 mol%. When the esterification rate of the ester component (B2) is less than 40 mol%, the solubility in the treatment agent may be lowered.

  From the point which demonstrates the effect of this invention more, 6 or less are preferable, as for HLB of an ester component (B2), 0.5-5.5 are more preferable, 1-5.5 are further more preferable, and 1-5 are especially. preferable.

  It is preferable that an ester component (B) consists of an ester component (B1) and an ester component (B2) from a viewpoint of exhibiting the effect of this invention more. In this case, the ratio (B1 / B2) of the ester component (B1) to the ester component (B2) is preferably 1/5 to 10,000 / 1, more preferably 1/2 to 5000/1, and 1/1 to 3500. / 1 is more preferable.

There is no limitation in particular as a manufacturing method of ester component (B1) and (B2), A well-known method is employable. For example, esterification can be performed under normal pressure or reduced pressure in the presence of an alkali catalyst, an acid catalyst, or no catalyst. Specifically, polyglycerin or sucrose, a fatty acid, and a catalyst are charged, and the reaction is performed under a nitrogen gas stream at a temperature of 160 to 260 ° C. until free fatty acid disappears. In addition, you may further refine | purify the obtained polyglycerol fatty acid ester or sucrose fatty acid ester by the request | requirement in use of the product used. The purification method is not particularly limited, and a known method can be employed. For example, adsorption treatment with activated carbon, activated clay, etc., deodorization treatment under reduced pressure using water vapor, nitrogen, etc. as carrier gas, washing with acid or alkali, molecular distillation etc. Can be purified.
Further, the ester components (B1) and (B2) can be produced according to a known transesterification reaction, and will be briefly described below by taking a method using a solvent as an example. A predetermined amount of raw materials, solvent and catalyst are charged, and the transesterification reaction is usually carried out for 20 to 80 hours while maintaining the temperature at 40 to 130 ° C. under reduced pressure. In addition, you may further refine | purify the obtained polyglyceryl fatty acid ester or sucrose fatty acid ester by the request | requirement in use of the product used. The purification method is not particularly limited, and a known method can be employed.

[Nonionic surfactant]
The treatment agent of the present invention preferably further contains a nonionic surfactant. By using a nonionic surfactant, emulsifying properties for imparting an aqueous system can be imparted. In addition, the oil film strength can be improved and the convergence can be improved, and high yarn-making properties can be obtained. One type or two or more types of nonionic surfactants may be used.

  Nonionic surfactants include polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol esters and polyoxyalkylene group-containing hydroxy fatty acid polyhydric alcohol esters from the viewpoint of improving the oil film strength of the treatment agent and obtaining high yarn-making properties. It is preferable to contain at least one nonionic surfactant (1) selected from esters in which at least one hydroxyl group is blocked with a fatty acid.

  5 to 95 weight% is preferable, as for the weight ratio of nonionic surfactant (1) to the whole nonionic surfactant, 8 to 93 weight% is more preferable, and 10 to 91 weight% is further more preferable. 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 (1), 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 may be either a block form or a random form. 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 (1) 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.

  Nonionic surfactant (1) includes, 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 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.

  Nonionic surfactants other than the nonionic surfactant (1) include polyoxyalkylene polyhydric alcohol ether (2), polyoxyalkylene polyhydric alcohol fatty acid ester (3), polyoxyalkylene aliphatic alcohol ether (4), Examples include polyalkylene glycol fatty acid esters (5) and polyhydric alcohol fatty acid esters (6).

  The polyoxyalkylene polyhydric alcohol ether (2) 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.

  As polyoxyalkylene polyhydric alcohol ether (2), 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 addition Products, sorbitol ethylene oxide adducts, sorbitol ethylene oxide propylene oxide adducts, ditrimethylolpropane ethylene oxide adducts, dipentaerythritol ethylene oxide adducts, sucrose ethylene oxide adducts, and the like, but are not limited thereto.

  The polyoxyalkylene polyhydric alcohol fatty acid ester (3) is a compound having a structure in which an alkylene oxide such as ethylene oxide, propylene oxide, or butylene oxide is added to a polyhydric alcohol and a fatty acid is ester-bonded.

  Examples of the polyhydric alcohol include glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose. Among these, 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 (3), 500-5000 are more preferable, and 700-3000 are more preferable.

  Examples of the polyoxyalkylene polyhydric alcohol fatty acid ester (3) 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 Although sucrose ethylene oxide adducts Toriraureto etc., but is not limited thereto.

  The polyoxyalkylene aliphatic alcohol ether (4) 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 the polyoxyalkylene aliphatic alcohol ether (4) include aliphatic alcohols such as octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, and oleyl alcohol. An alkylene oxide adduct of

  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.

  The fatty acid ester (5) 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.

  Examples of the polyalkylene glycol fatty acid ester (5) include polyethylene glycol monolaurate, polyethylene glycol dilaurate, polyethylene glycol monooleate, polyethylene glycol dioleate, polyethylene glycol monostearate, polyethylene glycol distearate, and polyethylene polypropylene glycol monolaur. Examples thereof include, but are not limited to, rate, polyethylene polypropylene glycol dilaurate, polyethylene polypropylene glycol monooleate, and polyethylene polypropylene glycol dioleate.

  The polyhydric alcohol fatty acid ester (6) is a compound having a structure in which a polyhydric alcohol and a fatty acid are ester-bonded, having at least one or two or more hydroxyl groups, and excluding the ester component (A). .

  Examples of the polyhydric alcohol include ethylene glycol, trimethylolpropane, pentaerythritol, erythritol, diethylene glycol, diglycerin, sorbitan, sorbitol, and ditrimethylolpropane. 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.

  100-1000 are preferable, as for the weight average molecular weight of a polyhydric-alcohol fatty acid ester (6), 200-800 are more preferable, and 300-600 are more preferable.

  Examples of the polyhydric alcohol fatty acid ester (6) include glycerol monolaurate, glycerol dilaurate, glycerol monooleate, glycerol dioleate, sorbitan monooleate, and sorbitan dioleate, but are not limited thereto. is not.

[Treatment agent for synthetic fibers]
The treatment agent for synthetic fibers of the present invention is a treatment agent used for producing a synthetic fiber that is hot-drawn without being wound after being applied to the raw synthetic fiber, and the ester component (A) described above. And an ester component (B) are essential. The ratio of the ester component (B) when the ester component (A) is 100 parts by weight is preferably 0.0001 to 10 parts by weight, more preferably 0.0003 to 8 parts by weight, and 0.0005 to 5 parts by weight. Is more preferable, and 0.001 to 3 parts by weight is particularly preferable. When the proportion is less than 0.0001 weight, it is difficult to exert a sufficient effect. On the other hand, when the ratio is more than 10 parts by weight, the viscosity of the treatment agent becomes high, smoothness may be insufficient, and fluff may increase.

When the ester component (B) is the ester component (B1), the proportion of the ester component (B1) when the ester component (A) is 100 parts by weight is preferably 0.0001 to 10 parts by weight, 8 parts by weight is more preferable, 0.0005 to 5 parts by weight is further preferable, and 0.001 to 3 parts by weight is particularly preferable. When the ratio is more than 10 parts by weight, it may be difficult to exert a sufficient effect.
When the ester component (B) is the ester component (B2), the proportion of the ester component (B2) when the ester component (A) is 100 parts by weight is preferably 0.0001 to 5 parts by weight, 3 parts by weight is more preferable, and 0.0005 to 2 parts by weight is still more preferable. When the ratio is more than 5 parts by weight, it may be difficult to exert a sufficient effect.

  10 to 70 weight% is preferable, as for the weight ratio of the ester component (A) to the non volatile matter of a processing agent, 13 to 67 weight% is more preferable, and 15 to 65 is more preferable. When the weight ratio is less than 10% by weight, the effect of improving work environment deterioration due to fuming of the treatment agent may be reduced. On the other hand, when the weight ratio exceeds 70% by weight, the effect of the present invention may not be exhibited. 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.

  When the processing agent contains a nonionic surfactant, the weight ratio of the nonionic surfactant to the nonvolatile content of the processing agent is preferably 15 to 65% by weight, more preferably 20 to 63% by weight, and more preferably 25 to 60% by weight. Is 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.

(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. 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 to 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 20% by weight, more preferably 0.1 to 15% by weight. . In addition, a surfactant here means a thing with a weight average molecular weight of less than 1000.

  Further, the treating agent for synthetic fibers of the present invention includes mineral oil, monohydric alcohol and fatty acid ester, polyhydric alcohol and fatty acid ester, monohydric alcohol and polyhydric carboxyl as a smoothing agent other than the ester component (A). You may contain the at least 1 sort (s) of smoothing agent (E) chosen from the ester of an acid. These smoothing agents (E) may use 1 type (s) or 2 or more types. The mineral oil here is not a low-viscosity diluent used for diluting the treatment agent, but is contained in the nonvolatile matter. The weight ratio of the smoothing agent (E) to the nonvolatile content of the treatment agent is preferably 0.1 to 30% by weight, and more preferably 1 to 20% by weight.

The mineral oil is not particularly limited, and examples thereof include machine oil, spindle oil, and liquid paraffin. The viscosity of the mineral oil at 30 ° C. is preferably 100 to 500 seconds.
The monohydric alcohol and fatty acid ester are not particularly limited, and examples include isooctyl palmitate, isotridecyl stearate, and oleyl oleate. The weight average molecular weight of the monohydric alcohol and fatty acid ester is preferably 300 to 600.
The ester of the polyhydric alcohol and the fatty acid is not particularly limited, and examples thereof include trimethylolpropane trilaurate, neopentyl glycol dioleate, and pentaerythritol tetradecanate. The weight average molecular weight of the polyhydric alcohol and fatty acid ester is preferably 300 to 1200.
The ester of a monohydric alcohol and a polyvalent carboxylic acid is not particularly limited, and examples include dioleyl adipate, dioctyl sebacate, and trioctyl trimellitate. As for the weight average molecular weight of ester of monohydric alcohol and polyhydric carboxylic acid, 300-1200 are preferable.

  Moreover, in order to provide heat resistance, the processing agent for synthetic fibers of this invention may contain antioxidant and a modified silicone further. Examples of the antioxidant include known ones such as phenol, thio, and phosphite. One or more antioxidants may be used. 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). 0.1-30 weight% is preferable and, as for the weight ratio of the stock solution stabilizer to the processing agent in the case of containing a stock solution stabilizer, 1-20 weight% is more preferable.

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. 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, isocetyl alcohol, Isostearyl alcohol is preferred.

  The treatment agent for synthetic fibers of the present invention may be composed of the above-mentioned components consisting only of non-volatile content, may be composed of non-volatile content and a stock solution stabilizer, and is an aqueous emulsion obtained by emulsifying non-volatile content in water. There may be. 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.

  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.

[Synthetic fiber filament yarn, its production method and fiber structure]
The synthetic fiber filament yarn of the present invention is provided with the synthetic fiber treating agent of the present invention. Moreover, the manufacturing method of the synthetic fiber filament yarn of this invention includes the process of providing the processing agent for synthetic fibers of this invention to a raw material synthetic fiber filament yarn. According to the manufacturing method of the invention, the occurrence of scum and yarn breakage can be reduced, and a synthetic fiber filament yarn excellent in yarn quality can be obtained. In addition, the raw material synthetic fiber filament yarn in this invention means the synthetic fiber filament yarn to which the processing agent is not provided.

  There is no restriction | limiting in particular as a process of providing the processing agent for synthetic fibers, 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.

  Examples of the synthetic fiber treatment agent to be applied to the raw material synthetic fiber filament yarn include a water-based emulsion treatment agent in which a non-volatile component is emulsified in water. 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.

  Examples of 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.

  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”.

[Example 1]
The components listed in Table 2 were mixed and stirred at 70 ° C. until uniform, to prepare treatment agent (I). Using each treatment agent (I) prepared above, the coagulation property and the stability of the emulsion were evaluated by the following methods. The results are shown in Table 2.

[Examples 2-47, Comparative Examples 1-17]
In the processing agent (I) of Example 1, it evaluated similarly to Example 1 except having changed into the processing agent component of Tables 2-5, and those compounding quantities. The results are shown in Tables 2-5.

In addition, the number of the processing agent component of Tables 2-5 shows the weight part of the non volatile matter of a processing agent. Moreover, the detail of a processing agent component is shown in Table 1 and the following.
Table 1 shows an ester component having a structure in which glycerin and a linear fatty acid are ester-bonded, and the weight ratio of the linear fatty acid constituting the ester component, the iodine value, the hydroxyl value, the acid value, and the weight average molecular weight of the ester component. Is shown. As an ester component, an ester obtained from nature is purified by a known method, and further purified ester is separated and re-purified using a difference in melting point by a known method, or a commercially available ester. Was used. In Table 1, the number following C indicates the carbon number of the fatty acid, and the number following F indicates the number of double bonds in the fatty acid.

<Ester component (B)>
B1-1: ester of polyglycerin (average polymerization degree 15) and C12-18 linear fatty acid, iodine value 40, hydroxyl value 80, weight average molecular weight 4100,
B1-2: Polyglycerol (average polymerization degree 10) ester with linear fatty acid of C12-22, iodine value 50, hydroxyl value 120, weight average molecular weight 2800,
B1-3: Polyglycerin (average polymerization degree 40) C12-18 linear and branched fatty acid esters, iodine value 40, hydroxyl value 20, weight average molecular weight 13000, HLB 3, esterification rate 90%
B1-4: Polyglycerin (average polymerization degree 4) ester with linear fatty acid of C12-22, iodine value 80, hydroxyl value 15, weight average molecular weight 1700, HLB 2, esterification rate 90%
B1-5: ester of polyglycerin (average polymerization degree 10) and C12-22 straight chain fatty acid, iodine value 30, hydroxyl value 110, weight average molecular weight 2600, HLB 5, esterification rate 60%
B2-1: Esters of sucrose and C8-18 linear and branched fatty acids, iodine value 0, hydroxyl value 240, weight average molecular weight 1150, HLB 5, esterification rate 40%
B2-2: ester of sucrose and C8-22 linear fatty acid, iodine value 70, hydroxyl value 10, weight average molecular weight 3000, HLB 2, esterification rate 95%
B2-3: ester of sucrose and C12-22 linear fatty acid, iodine value 0, hydroxyl value 100, weight average molecular weight 1650, HLB 3, esterification rate 65%
B2-4: ester of sucrose and C12-22 straight chain fatty acid, iodine value 40, hydroxyl value 100, weight average molecular weight 1750, HLB 3, esterification rate 60%

<Nonionic surfactant>
C-1: Nonionic activator obtained by adding 20 mol of EO to 1 mol of hardened castor oil C-2: Esterified product of ether type nonionic activator added with 20 mol of EO to 1 mol of hardened castor oil and 3 mol of oleic acid C-3: Castor Ether type nonionic active agent C-4 added with 10 mol of EO to 1 mol of oil C-5: Esterified product of ether type nonionic active agent added with 45 mol of EO to 1 mol of castor oil and 3 mol of oleic acid C-5: EO 20 mol to 1 mol of sorbitan Added ether type nonionic active agent C-6: esterified product of ether type nonionic active agent added with 20 mol of EO to 1 mol of sorbitan and 3 mol of oleic acid C-7: esterified product C of 1 mol of sorbitan and 1 mol of oleic acid -8: esterified product of polyethylene glycol (molecular weight 300) and 1 mol of lauric acid C-9: polyethylene C-10: Ether-type nonionic activator C-11 having 1 mol of EO added to 1 mol of lauryl alcohol C-11: Ether having randomly added 15 mol of EO to 1 mol of stearyl alcohol Type active agent C-12: esterified product of 1 mol of sucrose and 1 mol of lauric acid C-13: esterified product of 1 mol of sucrose and 2 mol of lauric acid

<Antistatic agent>
D-1: Isostearyl phosphate amine salt D-2: oleyl phosphate K salt D-3: lauryl sulfonate Na salt D-4: oleic acid K salt <other smoothing agent components>
E-1: Mineral oil (150 seconds)
E-2: Lauryl alcohol fatty acid (C18F1) ester E-3: Octyl alcohol fatty acid (C16, C18) ester E-4: Pentaerythritol fatty acid (C10) ester E-5: Dioleyl adipate

(Coagulability)
80 mL of treatment agent (I) is placed in a glass bottle with a lid of 100 mL, the container is sealed, and the treatment agent (I) is placed in an environmental testing machine (PL-3KP) manufactured by Espec Co., Ltd. set to a predetermined temperature (5 ° C.). The enclosed glass bottle was allowed to stand for 72 hours. The appearance of the subsequent treatment agent (I) was visually determined, and the coagulation property was evaluated according to the following criteria.
○: Not solidified and fluid.
Δ: Appearance is cloudy, cloudy, and partially solidified.
X: The appearance is cloudy and cloudy, and most of them are solidified.

(Stability of emulsion)
The glass bottle with the lid containing the treatment agent (I) used in the evaluation of the solidification property was left for 2 hours in an environmental test machine (PL-3KP) manufactured by ESPEC CORP. Set at a predetermined temperature (20 ° C.). Thereafter, the treating agent (I) was gradually added to ion-exchanged water under stirring at 20 ° C. After the addition, the mixture was stirred for 60 minutes until a uniform state was obtained, and a treatment agent (II) (O / W emulsion state) having a nonvolatile content concentration of 15% by weight was prepared. The obtained treating agent (II) was stored at 20 ° C. for 1 day. Thereafter, the appearance of the treating agent (II) was visually determined, and the stability of the emulsion was evaluated according to the following criteria.
○: A uniform emulsified state is maintained.
Δ: Floating matter is seen on the liquid surface.
X: Separated.

Next, suppression of fluctuations in the yarn forming property due to temperature changes was evaluated.
The treating agent (I) was allowed to stand at 3 ° C., 5 ° C., 15 ° C., 25 ° C., and 35 ° C. for 72 hours and then at 20 ° C. for 2 hours. Each processing agent (I) after that was gradually added to ion-exchanged water under stirring at 20 to 30 ° C. After the addition, the mixture was stirred for 60 minutes until a uniform state was obtained, and a treatment agent (III) (O / W emulsion state) having a nonvolatile content concentration of 15% by weight was prepared. Using the prepared treating agent (III), the number of yarn breaks and the number of fluff were evaluated by the following methods.

In the melt spinning step, the polyester polymer is melt-spun and cooled and solidified, and the treatment agent (III) prepared above is applied to the non-volatile component by 0.8% by weight using the nozzle oiling method. It was given to become.
The yarn to which the treatment agent was applied was continuously stretched without being wound up, and was stretched 2.6 times through a 140 ° C. hot roller to obtain 83 dtex and 36 filaments. 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 thread breakage when running for 24 hours were evaluated according to the following criteria.

(Number of yarn breaks)
The number of yarn breaks that occurred was evaluated according to the following criteria.
○: Number of yarn breaks less than 1 △: Number of yarn breaks 1 to 3 times ×: Number of yarn breaks 3 or more

(Number of fuzz)
The number of fluffs per million meters was measured using a fly counter (manufactured by Toray Engineer Co., Ltd.) and evaluated according to the following criteria.
○: Number of fluff less than 1 △: Number of fluff 1 to less than 3 ×: Number of fluff 3 or more

As can be seen from Tables 2 to 5, Examples 1 to 47 of the present invention are difficult to coagulate and are excellent in stability of the emulsion. Furthermore, the processing agent using the processing agent which is hard to coagulate can suppress fluctuations in the yarn forming property due to temperature changes such as seasonal factors, and can reduce fluff and yarn breakage. Therefore, a high quality fabric can be obtained.
On the other hand, Comparative Examples 1-17 are inferior in coagulation property, and are inferior in stability of an emulsion. Furthermore, the treatment agent having poor coagulation property and poor stability of the emulsion leads to fluff and yarn breakage in the spinning process, leading to a decrease in the full pipe ratio and poor weaving and knitting properties in the post-processing process.

  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 (15)

It has an ester component (A) having a structure in which glycerin and a linear fatty acid are ester-bonded, an ester component (B1) having a structure in which polyglycerin and a fatty acid are ester-bonded, and a structure in which sucrose and a fatty acid are ester-bonded. Containing at least one ester component (B) selected from the ester component (B2),
The linear fatty acid contains linoleic acid and a linear fatty acid having 14 to 22 carbon atoms excluding linoleic acid, and the proportion of linoleic acid in the whole linear fatty acid is 5 to 20% by weight. Linoleic acid and linoleic acid The total weight ratio with the linear fatty acid having 14 to 22 carbon atoms excluding the acid is 95% by weight or more,
The ester component (B2) is a compound having 3 or more ester groups in the molecule.
Treatment agent for synthetic fibers.   The processing agent according to claim 1, wherein the ester component (B) is the ester component (B1).   The processing agent according to claim 1, wherein the ester component (B) is the ester component (B2).   The processing agent of Claim 1 whose said ester component (B) is the said ester component (B1) and the said ester component (B2).   The processing agent in any one of Claims 1-4 whose ratio of the said ester component (B) when the said ester component (A) is 100 weight part is 0.0001-10 weight part.   The processing agent in any one of Claims 1-5 whose weight ratio of the said ester component (A) to the non volatile matter of a processing agent is 10 to 70 weight%.   The processing agent in any one of Claims 1-6 whose weight ratio of the linolenic acid to the said whole linear fatty acid is 2 weight% or less.   The processing agent in any one of Claims 1-7 whose iodine value of the said ester component (A) is 30-80.   The processing agent in any one of Claims 1-8 whose weight average molecular weights of the said ester component (A) are 500-1200.   The processing agent in any one of Claims 1-9 whose weight average molecular weights of the said ester component (B1) are 1100-20000, and whose weight average molecular weights of the said ester component (B2) are 1100-6500.   The processing agent in any one of Claims 1-10 whose hydroxyl value of the said ester component (B2) is 300 or less.   Furthermore, the processing agent in any one of Claims 1-11 containing a nonionic surfactant.   A synthetic fiber filament yarn obtained by applying the treatment agent according to any one of claims 1 to 12 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 1-12 to a raw material synthetic fiber filament yarn.   A fiber structure comprising the synthetic fiber filament yarn according to claim 13 and / or the synthetic fiber filament yarn obtained by the production method according to claim 14.