Composition containing first treatment agent for synthetic fiber, method for preparing dilution liquid of treatment agent for synthetic fiber, method for treating synthetic fiber, method for producing synthetic fiber, and method for producing short fiber

Abstract

The subject of the present invention is to provide a composition containing a first treatment agent for synthetic fibers with improved stability, etc. The composition containing a first treatment agent for synthetic fibers of the present invention is used in combination with a second treatment agent for synthetic fibers containing a nonionic surfactant (C) having a (poly)oxyalkylene structure in the molecule, and contains a first treatment agent for synthetic fibers and a solvent (S). The first treatment agent for synthetic fibers contains an organic phosphate salt (A) and the like in a predetermined proportion, and the acid value detected by potentiometric titration is greater than 0 mgKOH / g and less than 18 mgKOH / g. The boiling point of the solvent (S) at atmospheric pressure is less than 105°C. In the composition containing a first treatment agent for synthetic fibers, when the total content ratio of the first treatment agent for synthetic fibers and the solvent (S) is set to 100 parts by mass, the first treatment agent for synthetic fibers is contained in an amount of more than 35 parts by mass and less than 55 parts by mass.

Description

Technical Field

[0001] The present invention relates to a composition containing a first treatment agent for synthetic fibers and containing an organic phosphate salt, a method for preparing a diluent of the treatment agent for synthetic fibers, a method for treating synthetic fibers, a method for producing synthetic fibers, and a method for producing short fibers. Background Art

[0002] Generally, in the spinning and drawing process or the post-production process of synthetic fibers, a synthetic fiber surface is sometimes treated with a synthetic fiber treatment agent from the viewpoint of reducing friction and improving antistatic properties.

[0003] There is known a polyester synthetic fiber treatment agent disclosed in Patent Document 1. The polyester synthetic fiber treatment agent of Patent Document 1 contains a long-chain alkyl phosphate ester salt described below, a short-chain alkyl phosphate ester salt described below, an inorganic phosphate described below, and a nonionic surfactant in a predetermined ratio. The long-chain alkyl phosphate ester salt is an alkali metal salt of an alkyl phosphate ester having 16 to 18 carbon atoms in the alkyl group, the short-chain alkyl phosphate ester salt is an alkali metal salt of an alkyl phosphate ester having 4 to 8 carbon atoms in the alkyl group, and the inorganic phosphate is a dimetallic hydrogen phosphate or a trimetallic phosphate.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6348246 Summary of the invention

[0007] Problems to be solved by the invention

[0008] However, further improvement of the stability of the treatment agent is still being sought.

[0009] Means for solving problems

[0010] The inventors of the present invention have conducted research to solve the above-mentioned problems and have found that a composition in which a synthetic fiber treatment agent contains a predetermined organic phosphate salt and the like in a predetermined proportion and a first synthetic fiber treatment agent having a limited acid value is separated from a second synthetic fiber treatment agent containing a predetermined surfactant has a particularly good effect.

[0011] In order to solve the above-mentioned problems, one embodiment of the present invention provides a composition containing a first treatment agent for synthetic fibers, which is used in combination with a second treatment agent for synthetic fibers containing a nonionic surfactant (C) described later when used, and is constituted as a reagent independent of the second treatment agent for synthetic fibers when not in use, and contains the first treatment agent for synthetic fibers described later and a solvent (S) described later. The key point is that when the total content ratio of the first treatment agent for synthetic fibers and the solvent (S) is set to 100 parts by mass, the composition contains 35 parts by mass or more and 55 parts by mass or less of the first treatment agent for synthetic fibers.

[0012] A first treatment agent for synthetic fibers: comprising an organic phosphate salt (A) described below, an organic phosphate salt (B) described below, and optionally comprising a nonionic surfactant (C) described below; the ratio between the total content of the organic phosphate salt (A) and the organic phosphate salt (B) and the content of the nonionic surfactant (C) is (organic phosphate salt (A) + organic phosphate salt (B)) / nonionic surfactant (C) = 95 / 5 to 100 / 0, and when the total content of the organic phosphate salt (A) and the organic phosphate salt (B) is 100 parts by mass, the organic phosphate salt (A) is 80 parts by mass or more and less than 100 parts by mass and the organic phosphate salt (B) is greater than 0 parts by mass and less than 20 parts by mass, and the acid value detected from the first treatment agent for synthetic fibers by potentiometric titration is greater than 0 mgKOH / g and less than 18 mgKOH / g.

[0013] Solvent (S): a solvent having a boiling point of 105° C. or less under atmospheric pressure.

[0014] Organic phosphoric acid ester salt (A): an alkali metal salt of an organic phosphoric acid ester having a hydrocarbon group having 16 to 18 carbon atoms.

[0015] Organic phosphoric acid ester salt (B): an alkali metal salt of an organic phosphoric acid ester having a hydrocarbon group having 4 to 8 carbon atoms.

[0016] Nonionic surfactant (C): a nonionic surfactant having a (poly)oxyalkylene structure in the molecule.

[0017] The composition containing the first treatment agent for synthetic fibers may have an acid value greater than 1 mgKOH / g and less than 16 mgKOH / g as measured by potentiometric titration from the first treatment agent for synthetic fibers.

[0018] In the composition containing the first treatment agent for synthetic fibers, the solvent (S) may be water.

[0019] In order to solve the above-mentioned problems, another embodiment of the present invention provides a method for preparing a diluted solution of a synthetic fiber treatment agent, the focus of which is to add the above-mentioned composition containing the first treatment agent for synthetic fibers and the second treatment agent for synthetic fibers to water in a mass ratio of the first treatment agent for synthetic fibers / the second treatment agent for synthetic fibers=20 / 80 to 80 / 20, so that the concentration of the non-volatile component of the above-mentioned diluted solution is greater than 0.01 mass% and less than 10 mass%.

[0020] The method for preparing the diluted solution of the synthetic fiber treating agent may include step 1 and step 2 described below.

[0021] Step 1: Add the composition containing the first treatment agent for synthetic fibers and the second treatment agent for synthetic fibers to first water to prepare a diluted solution of the treatment agent for synthetic fibers having a nonvolatile component concentration of more than 2% by mass and less than 10% by mass.

[0022] Step 2: The diluted solution of the synthetic fiber treating agent prepared in step 1 is further added to the second water to prepare a diluted solution of the synthetic fiber treating agent having a nonvolatile component concentration of 0.01% by mass or more and 2% by mass or less.

[0023] The method for preparing the diluted solution of the above-mentioned synthetic fiber treatment agent may also be: the above-mentioned step 1 includes the following steps: adding the above-mentioned composition containing the first treatment agent for synthetic fibers and the second treatment agent for synthetic fibers to water at a temperature of 60°C to 95°C, which is more than 20% by mass and less than 70% by mass of the total amount of the above-mentioned first water, and then adding the remaining first water at a temperature of less than 40°C.

[0024] The method for preparing the diluted solution of the above-mentioned synthetic fiber treatment agent may also be: the above-mentioned step 1 includes the following steps: adding the above-mentioned composition containing the first synthetic fiber treatment agent to water at a temperature of 60°C to 95°C, which is more than 20% by mass and less than 70% by mass of the total amount of the above-mentioned first water, and then adding the remaining first water at a temperature of less than 40°C, and then adding the above-mentioned second synthetic fiber treatment agent.

[0025] In order to solve the above-mentioned problems, another embodiment of the present invention provides a method for treating synthetic fibers, the focus of which is to provide a diluted solution of a synthetic fiber treatment agent to the synthetic fibers, wherein the diluted solution of the synthetic fiber treatment agent is obtained by adding the composition containing the first synthetic fiber treatment agent and the second synthetic fiber treatment agent to water.

[0026] In order to solve the above-mentioned problems, another embodiment of the present invention provides a method for manufacturing synthetic fibers, which focuses on the step of imparting a diluted solution of a synthetic fiber treatment agent to the synthetic fibers, wherein the diluted solution of the synthetic fiber treatment agent is obtained by adding the above-mentioned composition containing the first synthetic fiber treatment agent and the second synthetic fiber treatment agent to water.

[0027] In order to solve the above-mentioned problems, another embodiment of the present invention provides a method for manufacturing short fibers, the focus of which is to include the step of imparting a diluted solution of a synthetic fiber treatment agent to synthetic fibers, wherein the diluted solution of the synthetic fiber treatment agent is obtained by adding the above-mentioned composition containing the first synthetic fiber treatment agent and the second synthetic fiber treatment agent to water.

[0028] Effects of the Invention

[0029] According to the present invention, the stability of the treatment agent can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of a friction test device for evaluating elongation in the Examples section. DETAILED DESCRIPTION

[0031] <First embodiment>

[0032] The following describes a first embodiment of the composition containing the first treatment agent for synthetic fibers of the present invention (hereinafter referred to as "the composition containing the first treatment agent"). The composition containing the first treatment agent of this embodiment contains the first treatment agent for synthetic fibers described later (hereinafter referred to as "the first treatment agent") and the solvent (S) described later.

[0033] (First treatment agent)

[0034] The first treatment agent used in the first treatment agent-containing composition of the present embodiment contains an organic phosphate salt (A) described below, an organic phosphate salt (B) described below, and optionally contains a nonionic surfactant (C) described below.

[0035] (Organophosphate salt (A))

[0036] The organic phosphoric acid ester salt (A) is an alkali metal salt of an organic phosphoric acid ester having a hydrocarbon group having 16 to 18 carbon atoms.

[0037] The hydrocarbon group constituting the organic phosphate salt (A) may be a saturated hydrocarbon group or an unsaturated hydrocarbon group. In addition, it may be a straight-chain hydrocarbon group or a branched hydrocarbon group. Specific examples of straight-chain saturated hydrocarbon groups include hexadecyl, heptadecyl, and octadecyl. Specific examples of branched saturated hydrocarbon groups include isohexadecyl, isoheptadecyl, and isooctadecyl.

[0038] The unsaturated hydrocarbon group may be an alkenyl group having a double bond of one unsaturated carbon bond, or may be a hydrocarbon dienyl group, hydrocarbon trienyl group, etc. having two or more double bonds. In addition, it may be an alkynyl group having a triple bond of one unsaturated carbon bond, or may be a hydrocarbon dialkynyl group, etc. having two or more triple bonds. Specific examples of the straight-chain unsaturated hydrocarbon group having one double bond in the hydrocarbon group include hexadecene, heptadecenyl, and octadecene. Specific examples of the unsaturated hydrocarbon group having one double bond and a branched structure in the hydrocarbon group include isohexadecenyl, isoheptadecenyl, and isooctadecene.

[0039] Specific examples of the alkali metal constituting the alkali metal salt include sodium, potassium, lithium, and the like.

[0040] Specific examples of the organic phosphate salt (A) include stearyl potassium phosphate (2.5), stearyl potassium phosphate (2.6), stearyl potassium phosphate (2.8), stearyl potassium phosphate (3.0), cetyl stearyl (30:70) phosphate potassium salt (2.6), cetyl stearyl (20:80) phosphate potassium salt (2.8), cetyl stearyl (50:50) phosphate potassium salt (2.5), cetyl stearyl (50:50) phosphate potassium salt (2.8), cetyl stearyl (60:40) phosphate potassium salt (2.5), cetyl stearyl (70:30) phosphate potassium salt (3.0), and the like.

[0041] In addition, the numerical value in the brackets recorded after the cetyl stearyl group indicates the mass ratio of cetyl alcohol and stearyl alcohol used as raw materials (the same applies hereinafter). In addition, the numerical value in the brackets recorded at the end of the specific example indicates the molar ratio of the alcohol used as raw material to phosphorus pentoxide (the same applies hereinafter). When two or more alcohols are used as raw materials in the organic phosphate salt, the molar ratio of the raw material alcohol to phosphorus pentoxide is calculated using the theoretical molecular weight calculated from the content of each alcohol (the same applies hereinafter). For example, in the case of cetyl alcohol (molecular weight: 242.44): stearyl alcohol (molecular weight: 270.49) = 30:70, the theoretical molecular weight of cetearyl alcohol (30:70) is 242.44×0.3+270.49×0.7=262.08.

[0042] As these organic phosphate salts (A), one type of organic phosphate salt may be used alone, or two or more types of organic phosphate salts may be used in combination as appropriate.

[0043] (Organophosphate salt (B))

[0044] The organic phosphoric acid ester salt (B) is an alkali metal salt of an organic phosphoric acid ester having a hydrocarbon group having 4 to 8 carbon atoms.

[0045] The hydrocarbon group constituting the organic phosphate salt (B) may be a saturated hydrocarbon group or an unsaturated hydrocarbon group. In addition, it may be a straight-chain hydrocarbon group or a branched hydrocarbon group. Specific examples of straight-chain saturated hydrocarbon groups include butyl, pentyl, hexyl, heptyl, and octyl. Specific examples of branched saturated hydrocarbon groups include isobutyl, isopentyl, isohexyl, isoheptyl, and isooctyl.

[0046] The unsaturated hydrocarbon group may be an alkenyl group having one double bond of an unsaturated carbon bond, or may be a hydrocarbon dienyl group or hydrocarbon trienyl group having two or more double bonds. In addition, it may be an alkynyl group having one triple bond of an unsaturated carbon bond, or may be a hydrocarbon dienyl group or the like having two or more triple bonds. Specific examples of the straight-chain unsaturated hydrocarbon group having one double bond in the hydrocarbon group include butenyl, pentenyl, hexenyl, heptenyl, and octenyl. Specific examples of the unsaturated hydrocarbon group having one double bond and a branched structure in the hydrocarbon group include isobutenyl, isopentenyl, isohexenyl, isoheptenyl, and isooctenyl.

[0047] Specific examples of the alkali metal constituting the alkali metal salt include sodium, potassium, lithium, and the like.

[0048] Specific examples of the organic phosphate salt (B) include butyl phosphate potassium salt (1.8), butyl phosphate potassium salt (2.5), hexyl phosphate potassium salt (2.0), hexyl octyl (50:50) phosphate potassium salt (1.8), 2-ethylhexyl phosphate potassium salt (2.6), octyl phosphate potassium salt (3.0), etc.

[0049] As these organic phosphate salts (B), one type of organic phosphate salt may be used alone, or two or more types of organic phosphate salts may be used in appropriate combination.

[0050] In the first treatment agent, when the total content of the organic phosphate salt (A) and the organic phosphate salt (B) is 100 parts by mass, the organic phosphate salt (A) is 80 parts by mass or more and less than 100 parts by mass, and the organic phosphate salt (B) is greater than 0 parts by mass and less than 20 parts by mass. By defining the content within this range, the stability of the composition containing the first treatment agent, especially the temperature stability, can be improved.

[0051] (Nonionic surfactant (C))

[0052] The nonionic surfactant (C) is a nonionic surfactant having a (poly)oxyalkylene structure in the molecule. Examples of the nonionic surfactant (C) include those obtained by adding alkylene oxide to alcohols or carboxylic acids, ether-ester compounds obtained by adding alkylene oxide to ester compounds formed by carboxylic acids and polyols, and those obtained by adding alkylene oxide to alkylamines as amine compounds.

[0053] Specific examples of alcohols used as raw materials for nonionic surfactants include (1) straight-chain alkanols such as methanol, ethanol, propanol, butanol, pentanol, hexanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, and triacontanol; (2) isobutyl alcohol, isohexanol, 2-ethylhexanol, isononanol, isodecanol, isotridecanol, isotetradecanol, isodecanol, and isodecanol. (i) branched alkanols such as pentadecanol, isohexadecanol, isoheptadecanol, isooctadecanol, isononadecanol, isoeicosanol, isoheneicosanol, isodocosanol, isotricosanol, isotetracosanol, isopentacosanol, isohexadecanol, isohexadecanol, isohexadecanol, isoctacosanol, isononacosanol and isotriacontanol; (2) straight-chain alkanols such as tetradecanol, hexadecanol, heptadecanol, octadecanol and nonadecanol; (3) branched alkanols such as tetradecanol, hexadecanol, heptadecanol, octadecanol and nonadecanol; (4) branched alkanols such as isohexadecanol and isooctadecanol; (5) cyclic alkanols such as cyclopentanol and cyclohexanol; (6) aromatic alcohols such as phenol, nonylphenol, benzyl alcohol, monostyrenated phenol, distyrenated phenol and tristyrenated phenol.

[0054] Specific examples of carboxylic acids used as raw materials for nonionic surfactants include (1) straight-chain alkyl carboxylic acids such as octanoic acid, nonanoic acid, decanoic acid, undecanoic acid, dodecanoic acid, tridecanoic acid, tetradecanoic acid, pentadecanoic acid, hexadecanoic acid, heptadecanoic acid, octadecanoic acid, nonadecanoic acid, eicosanoic acid, heneicosanoic acid, and docosanoic acid; (2) branched-chain alkyl carboxylic acids such as 2-ethylhexanoic acid, isododecanoic acid, isotridecanoic acid, isotetradecanoic acid, isohexadecanoic acid, and isooctadecanoic acid; (3) straight-chain alkenyl carboxylic acids such as octadecenoic acid, octadecadienoic acid, and octadecatrienoic acid; (4) aromatic carboxylic acids such as benzoic acid; (5) hydroxycarboxylic acids such as ricinoleic acid; and (6) fatty acids derived from animal or plant oils such as castor oil fatty acid, sesame oil fatty acid, rosin oil fatty acid, soybean oil fatty acid, rapeseed oil fatty acid, coconut oil fatty acid, lard fatty acid, and tallow fatty acid.

[0055] Specific examples of alkylene oxides used as raw materials for forming (poly)oxyalkylene structures in nonionic surfactants include ethylene oxide, propylene oxide, etc. The number of moles of alkylene oxide added can be appropriately set, preferably more than 0.1 mole and less than 60 moles, more preferably more than 1 mole and less than 40 moles, and most preferably more than 2 moles and less than 30 moles. It can also be a range of any combination of the above upper and lower limits. In addition, the number of moles of alkylene oxide added represents the number of moles of alkylene oxide relative to 1 mole of alcohol or carboxylic acid in the loading raw material. When multiple types of alkylene oxides are used, it can be a block adduct or a random adduct.

[0056] Specific examples of the polyol used as a raw material for the nonionic surfactant include ethylene glycol, propylene glycol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2-methyl-1,2-propanediol, 1,5-pentanediol, 1,6-hexanediol, 2,5-hexanediol, 2-methyl-2,4-pentanediol, 2,3-dimethyl-2,3-butanediol, glycerol, 2-methyl-2-hydroxymethyl-1,3-propanediol, 2-ethyl-2-hydroxymethyl-1,3-propanediol, trimethylolpropane, sorbitan, pentaerythritol, sorbitol, and the like.

[0057] Specific examples of the alkylamine used as a raw material of the nonionic surfactant include methylamine, ethylamine, butylamine, octylamine, laurylamine, octadecylamine, coconut amine and the like.

[0058] Specific examples of the nonionic surfactant (C) include polyoxyethylene alkyl ethers, polyoxyethylene alkenyl ethers, polyoxyethylene polyoxypropylene alkyl ethers (block adducts, random adducts), polyoxyethylene polyoxypropylene alkenyl ethers (block adducts, random adducts), polyoxypropylene alkyl ethers, polyoxypropylene alkenyl ethers, polyoxyethylene adducts of fats and oils, polyoxyethylene polyoxypropylene adducts of fats and oils (random adducts, block adducts), polyoxyethylene fatty acid esters, polyoxyethylene polyoxypropylene fatty acid esters (random adducts, block adducts), polyoxyethylene alkylamine ethers, acid neutralization products of polyoxyethylene alkylamine ethers, polyoxyethylene polyol ether fatty acid esters, polyoxyethylene polyoxypropylene polyol ether fatty acid esters (random adducts, block adducts), and the like.

[0059] As these nonionic surfactants (C), one type of nonionic surfactant may be used alone, or two or more types of nonionic surfactants may be used in appropriate combination.

[0060] The upper limit of the content of the nonionic surfactant (C) in the first treatment agent is preferably 5% by mass or less, more preferably 2% by mass or less, and most preferably 1% by mass or less. By limiting the content to 5% by mass or less, the stability of the composition containing the first treatment agent can be further improved.

[0061] In the first treatment agent, the ratio of the total content of the organic phosphate salt (A) and the organic phosphate salt (B) to the content of the nonionic surfactant (C) is expressed as a mass ratio as (organic phosphate salt (A) + organic phosphate salt (B)) / nonionic surfactant (C) = 95 / 5 to 100 / 0. By being within this range, the stability of the composition containing the first treatment agent can be improved.

[0062] (Acid value)

[0063] The acid value of the first treatment agent detected by potentiometric titration is greater than 0 mgKOH / g and less than 18 mgKOH / g, preferably greater than 1 mgKOH / g and less than 16 mgKOH / g. By defining it within this range, the stability of the composition containing the first treatment agent can be improved, especially the temperature stability. In addition, the operability of the composition containing the first treatment agent can be improved. In addition, it can also be a range of any combination of the above upper and lower limits. Organic phosphate salts (A) and organic phosphate salts (B) are obtained, for example, by the following method: the raw alcohols are reacted with phosphorus pentoxide to obtain phosphate esters, and then the phosphate esters are neutralized with a base such as potassium hydroxide as appropriate. The acid value can be adjusted by adjusting the degree of neutralization, etc.

[0064] (Solvent(S))

[0065] The solvent (S) is a solvent having a boiling point of 105°C or less under atmospheric pressure. Examples of the solvent (S) include water and organic solvents. Specific examples of organic solvents include lower alcohols such as ethanol and propanol, and low-polarity solvents such as hexane. These solvents (S) may be used alone as a single type of solvent, or two or more solvents may be used in appropriate combination. Among these, polar solvents such as water and lower alcohols are preferred from the viewpoint of making the mixture of the first treatment agent and the second treatment agent for synthetic fibers (hereinafter referred to as the "second treatment agent") into an emulsion, and water is more preferred from the viewpoint of excellent operability of the composition containing the first treatment agent.

[0066] The composition containing the first treatment agent contains 35 parts by mass or more and 55 parts by mass or less of the first treatment agent when the total content ratio of the first treatment agent and the solvent (S) is 100 parts by mass. By setting the first treatment agent to 35 parts by mass or more, the stability of the composition containing the first treatment agent can be improved. By setting the first treatment agent to 55 parts by mass or less, the operability of the composition containing the first treatment agent can be improved.

[0067] (Second treatment agent)

[0068] The composition containing the first treatment agent is used together with the second treatment agent containing a nonionic surfactant (C) when in use. The composition containing the first treatment agent is constituted as an independent agent relative to the second treatment agent before use, such as during storage or circulation. When in use, the composition containing the first treatment agent is mixed with the second treatment agent to prepare a treatment agent for synthetic fibers when in use. The second treatment agent is described below. The second treatment agent contains the above-mentioned nonionic surfactant (C), and other components may also be mixed as appropriate.

[0069] (Other ingredients)

[0070] Depending on the application purpose or necessity and within the scope that does not hinder the effect of the present invention, the second treatment agent may further contain other components other than the above-mentioned components, such as solvents, polyols, mineral oils as lubricants, esters, polysilicone compounds, anionic surfactants, clamping agents, carboxylates, etc. Specific examples of solvents can be those listed in the above solvent (S) column. From the viewpoint of improving the appearance and stability of the product, the content of the solvent in the second treatment agent is preferably 20% by mass or less.

[0071] Specific examples of polyols include propylene glycol, diethylene glycol, ethylene glycol, glycerol, etc. Specific examples of mineral oils include paraffin, hydrogen-treated light paraffin, etc. Specific examples of esters include sorbitan monooleate, sorbitan monostearate, glycerol monooleate, castor oil, etc. Specific examples of polysiloxanes include polydimethylsiloxane, etc. Specific examples of anionic surfactants include potassium laurate, potassium oleate, sodium lauryl sulfate, sodium alkyl (C14-16) sulfonate, dioctyl sodium sulfosuccinate, etc. Specific examples of chelating agents include disodium ethylenediaminetetraacetate, trisodium ethylenediamine-N,N'-disuccinate, etc. Specific examples of carboxylates include potassium lactate, potassium acetate, etc.

[0072] The effects of the composition containing the first treatment agent according to the above-described embodiment will be described.

[0073] (1-1) The composition containing the first treatment agent of the above embodiment contains the first treatment agent and a solvent (S), the first treatment agent contains an organic phosphate salt (A) and the like in a predetermined ratio, and the acid value detected by potentiometric titration is greater than 0 mgKOH / g and less than 18 mgKOH / g. Before use, for example, during storage or circulation, the synthetic fiber treatment agent is composed of the composition containing the first treatment agent and the second treatment agent containing the nonionic surfactant (C) as independent reagents. When used, the composition containing the first treatment agent is mixed with the second treatment agent to prepare the synthetic fiber treatment agent for use.

[0074] This method can improve the stability of the composition containing the first treatment agent and the second treatment agent constituting the synthetic fiber treatment agent. Therefore, the efficacy of the functional components such as the organic phosphate salt contained in the synthetic fiber treatment agent can be effectively exerted. In addition, the operability of the composition containing the first treatment agent can be improved.

[0075] (1-2) The composition containing the first treatment agent according to the above embodiment can improve the room temperature stability, which is the storage stability. In addition, the stability of the composition may be further reduced in the low temperature range, especially in winter. The composition containing the first treatment agent according to the above embodiment can improve the temperature change stability in an environment where the temperature changes in the low temperature range.

[0076] <Second embodiment>

[0077] Next, a second embodiment of the method for preparing a diluted solution of the synthetic fiber treating agent of the present invention (hereinafter referred to as "the method for preparing a diluted solution of the treating agent") will be described.

[0078] The method for preparing the diluted solution of the treatment agent of the present embodiment is a method in which the composition containing the first treatment agent of the first embodiment and the second treatment agent are added to water so that the non-volatile component concentration of the diluted solution becomes 0.01 mass % or more and 10 mass % or less. In this specification, the non-volatile component refers to the residue after the object is heat-treated at 105° C. for 2 hours to fully remove the volatile substances, that is, the absolutely dry substance.

[0079] The diluent of the treatment agent of this embodiment is a composition containing the first treatment agent and the second treatment agent, which are mixed to form the first treatment agent / second treatment agent = 20 / 80 to 80 / 20 (mass ratio). In the method of using the first treatment agent and the second treatment agent together, the mixing ratio of the first treatment agent and the second treatment agent can be arbitrarily changed. Therefore, even under different manufacturing conditions such as different manufacturing equipment or different climates such as temperature and humidity, a treatment agent with optimal spinning elongation at any time can be easily prepared by slightly adjusting the mixing ratio. In this way, stable fiber manufacturing can be carried out.

[0080] The method of adding the composition containing the first treatment agent and the second treatment agent to water can be appropriately adopted by a known method, preferably including the following step 1 and the following step 2. By this method, when the mixture of the composition containing the first treatment agent and the second treatment agent is in the form of an emulsion, the stability of the emulsion can be further improved.

[0081] Step 1 is a step of adding a composition containing a first treatment agent and a second treatment agent to the first water to prepare a mother liquor of a dilution of a synthetic fiber treatment agent having a non-volatile component concentration greater than 2% by mass and less than 10% by mass. The order in which the composition containing the first treatment agent and the second treatment agent are added to the first water is not particularly limited. The composition containing the first treatment agent can be added to the first water first, and then the second treatment agent is added thereto. The second treatment agent can also be added to the first water first, and then the composition containing the first treatment agent is added thereto. In addition, the composition containing the first treatment agent and the second treatment agent can also be added to the first water at the same time. From the viewpoint of improving the stability of the emulsion, it is preferred to first add the composition containing the first treatment agent to the first water, and then add the second treatment agent thereto. In addition, the temperature of the dilution water is not particularly limited.

[0082] In addition, step 1 preferably includes the following steps: heating water of 20% by mass or more and 70% by mass or less of the total amount of the first water to 60°C or more and 95°C or less, adding the composition containing the first treatment agent and the second treatment agent thereto, and then adding the remaining first water below 40°C. By this method, when the mixture of the composition containing the first treatment agent and the second treatment agent is in the form of an emulsion, the stability of the emulsion can be further improved. In this case, the order in which the composition containing the first treatment agent and the second treatment agent are added to the water is not particularly limited. The composition containing the first treatment agent can be added to the water first, and then the second treatment agent can be added thereto, or the second treatment agent can be added to the water first, and then the composition containing the first treatment agent can be added thereto. In addition, the composition containing the first treatment agent and the second treatment agent can also be added to the water at the same time. From the viewpoint of improving the stability of the emulsion, it is preferred to first add the composition containing the first treatment agent to the water, and then add the second treatment agent thereto.

[0083] In addition, step 1 may also include the following steps: heating 20% ​​to 70% of the total amount of the first water to 60° C. to 95° C., adding the composition containing the first treatment agent thereto, then adding the remaining first water at 40° C. or less, and finally adding the second treatment agent. By this method, when the mixture of the composition containing the first treatment agent and the second treatment agent is in the form of an emulsion, the stability of the emulsion can be further improved.

[0084] Step 2 is a step of adding a second water to the mother solution of the diluted solution of the synthetic fiber treating agent prepared in step 1 to prepare a diluted solution of the synthetic fiber treating agent having a nonvolatile component concentration of 0.01 mass % to 2 mass %.

[0085] The effects of the method for preparing the diluted solution of the treatment agent in the above-mentioned embodiment will be described.

[0086] (2-1) The method for preparing the dilution of the treatment agent of the above embodiment is a method of adding a composition containing a first treatment agent and a second treatment agent to water in a predetermined ratio so that the non-volatile component concentration of the above dilution becomes 0.01 mass % or more and 10 mass % or less. According to this method, when the mixture of the composition containing the first treatment agent and the second treatment agent is in the form of an emulsion, the stability of the emulsion can be improved. In addition, since the dilution of the fiber imparting method can be prepared by mixing the pre-prepared composition containing the first treatment agent and the second treatment agent in water, the dilution can be prepared more simply than the method of preparing the dilution from the reagents when using.

[0087] (2-2) In addition, by adding the composition containing the first treatment agent and the second treatment agent to water to prepare a mother solution of a dilution solution of the synthetic fiber treatment agent having a non-volatile component concentration of more than 2% by mass and less than 10% by mass, the stability of the emulsion can be further improved. In this way, the efficacy of each component can be effectively exerted without reducing the uniform adhesion of the components to the fiber.

[0088] <Third embodiment>

[0089] Next, a third embodiment of the synthetic fiber treatment method of the present invention will be described.

[0090] The method for treating synthetic fibers of the present embodiment is a method for applying a dilute solution of a treating agent to synthetic fibers in, for example, a spinning or stretching step, a post-processing step, etc., wherein the dilute solution of the treating agent is obtained by adding a composition containing a first treating agent and a second treating agent to water. The preparation method of the dilute solution of the treating agent may adopt the preparation method of the dilute solution of the treating agent of the second embodiment. The dilute solution of the treating agent attached to the synthetic fibers may also evaporate water in a drying step.

[0091] Specific examples of synthetic fibers to which the diluent of the treatment agent is applied are not particularly limited, and examples thereof include (1) polyester fibers such as polyethylene terephthalate (PET), polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polylactic acid, and composite fibers containing these polyester resins; (2) polyamide fibers such as nylon 6 and nylon 66; (3) polyacrylic acid fibers such as polyacrylic acid and modified acrylic acid; (4) polyolefin fibers such as polyethylene and polypropylene. Among these, polyester fibers or polyolefin fibers are preferably used from the viewpoint of being beneficial in achieving the effect of uniformly applying the treatment agent for synthetic fibers by improving wettability.

[0092] The use of the synthetic fiber to which the diluent of the treatment agent is applied in the post-processing step is not particularly limited, and examples thereof include short fibers, spun yarns, nonwoven fabrics, etc. It can also be applied to any fiber use of short fibers and long fibers, preferably short fibers. Short fibers generally refer to those called "staples" and do not include long fibers called "filaments". In addition, the length of the short fibers is not particularly limited as long as it meets the definition of short fibers in the technical field of the present invention, and is preferably, for example, less than 100 mm.

[0093] The proportion of the diluted solution of the treatment agent attached to the synthetic fiber is not particularly limited, and it is preferably a proportion of 0.1 to 3% by mass (excluding solvents such as water) of the diluted solution of the treatment agent attached to the synthetic fiber. With this configuration, the efficacy of each component can be effectively exerted. In addition, the method of attaching the treatment agent to the synthetic fiber is not particularly limited, and a known method can be adopted according to the type and form of the synthetic fiber, such as a drum oiling method, a guided oiling method using a metering pump, an immersion oiling method, a spray oiling method, etc.

[0094] The effects of the synthetic fiber processing method according to the present embodiment will be described.

[0095] (3-1) The method for treating synthetic fibers of the present embodiment is a method for applying a dilute solution of a treating agent to synthetic fibers, for example, in a spinning or stretching step, a post-processing step, etc. Therefore, the effectiveness of each component on short fibers, spun yarn, nonwoven fabrics, etc. can be effectively exerted without reducing the uniform adhesion of each component to the synthetic fibers.

[0096] In addition, the above-mentioned embodiment may be modified as follows: The above-mentioned embodiment and the following modified examples may be implemented in combination with each other within the scope of no technical contradiction.

[0097] The first treatment agent, the second treatment agent, or the composition containing the first treatment agent of the above-mentioned embodiment may be further mixed with components commonly used in treatment agents, such as stabilizers, antistatic agents, binders, antioxidants, and ultraviolet absorbers, for maintaining the quality of each agent, within the range not impairing the effects of the present invention.

[0098] Example

[0099] In order to more specifically describe the constitution and effects of the present invention, examples are given below, but the present invention is not limited to these examples. In the following examples and comparative examples, parts represent parts by mass, and unless otherwise specified, % represents % by mass.

[0100] Test Category 1 (Preparation of the first treatment agent)

[0101] (First treatment agent (I-1))

[0102] The first treatment agent (I-1) was prepared using the components shown in Table 1 by the preparation method described below.

[0103] A first treatment agent (I-1) was prepared, which contained 99 parts (%) of stearyl phosphate potassium salt (2.5) (A-1) as the organic phosphate salt (A) and 1 part (%) of butyl phosphate potassium salt (1.8) (B-1) as the organic phosphate salt (B).

[0104] (First treatment agent (I-2) to (I-12), (rI-13) to (rI-15))

[0105] The first treatment agents (I-2) to (I-12) and (rI-13) to (rI-15) were prepared in the same manner as the first treatment agent (I-1), and were mixed with the organic phosphate salt (A) and the organic phosphate salt (B) in the ratio shown in Table 1.

[0106] The type and content of the organic phosphate salt (A), and the type and content of the organic phosphate salt (B) are shown in the "Organic phosphate salt (A)" column and the "Organic phosphate salt (B)" column of Table 1, respectively.

[0107] (Acid value)

[0108] Determine the acid value in the first treatment agent. The specific method for determining the acid value is as follows. Sample the first treatment agent into a 100mL beaker so that the mass of the first treatment agent becomes 2g. Add 80mL of ethanol / xylene = 1 / 2 solution and stir using a magnetic stirrer. If it is not easy to dissolve at this time, warm the solvent in a 60°C hot water bath and then stir, and then cool it to room temperature again before measuring. Use a potentiometric titration apparatus and a 1 / 10N KOH methanol solution to determine the acid value. The acid value of the first treatment agent is shown in the "Acid value measured from the first treatment agent" column of Table 1.

[0109] [Table 1]

[0110]

[0111] The details of the organic phosphate salt (A) and the organic phosphate salt (B) described in Table 1 are as follows.

[0112] (Organophosphate salt (A))

[0113] A-1: Potassium stearyl phosphate (2.5)

[0114] A-2: Potassium stearyl phosphate (2.6)

[0115] A-3: Potassium stearyl phosphate (2.8)

[0116] A-4: Potassium stearyl phosphate (3.0)

[0117] A-5: Cetyl stearyl (30:70) potassium phosphate (2.6)

[0118] A-6: Cetyl stearyl (20:80) potassium phosphate (2.8)

[0119] A-7: Cetyl stearyl (50:50) phosphate potassium salt (2.5)

[0120] A-8: Cetyl stearyl (50:50) phosphate potassium salt (2.8)

[0121] A-9: Cetyl stearyl (60:40) phosphate potassium salt (2.5)

[0122] A-10: Cetyl stearyl (70:30) phosphate potassium salt (3.0)

[0123] a-1: Behenyl phosphate potassium salt (3.0)

[0124] (Organophosphate salt (B))

[0125] B-1: Potassium butyl phosphate (1.8)

[0126] B-2: Potassium butyl phosphate (2.5)

[0127] B-3: Potassium hexyl phosphate (2.0)

[0128] B-4: Hexyloctyl (50:50) phosphate potassium salt (1.8)

[0129] B-5: 2-Ethylhexyl phosphate potassium salt (2.6)

[0130] B-6: Potassium octyl phosphate (3.0)

[0131] Test Category 2 (Preparation of a composition containing the first treatment agent)

[0132] (Example 1)

[0133] The composition (XI-1) containing the first treatment agent of Example 1 was prepared by the preparation method described below using the components shown in Table 2. As shown in Table 2, the composition (XI-1) containing the first treatment agent of Example 1 was prepared, which contained 40 parts (%) of the first treatment agent (I-1) and 60 parts (%) of water as a solvent (S).

[0134] (Examples 2 to 12, Comparative Examples 1 to 5)

[0135] Examples 2 to 12 (compositions (XI-2) to (XI-12) containing the first treatment agent) and Comparative Examples 1 to 5 (compositions (rXI-13) to (rXI-17) containing the first treatment agent) were prepared in the same manner as Example 1, and contained the first treatment agent and the solvent (S) in the ratios shown in Table 2. The type and content of the first treatment agent, and the type and content of the solvent (S) are shown in the "First Treatment Agent" column and the "Solvent (S)" column of Table 2, respectively.

[0136] [Table 2]

[0137]

[0138] Test Category 3 (Preparation of the Second Treatment Agent)

[0139] (Second treatment agent (II-1))

[0140] The second treatment agent (II-1) was prepared using the components shown in Table 3 by the preparation method described below.

[0141] 65 parts (%) of (polyoxyethylene)(polyoxypropylene) (m=6, n=2, m is the number of oxyethylene units (the same below), n is the number of oxypropylene units (the same below), random polymer) C12-13 alkyl ether (C-4) as a nonionic surfactant (C), 22 parts (%) of polyoxyethylene (10 mol) coconut alkylamine ether (C-25), and 13 parts (%) of polyoxyethylene (15 mol) coconut alkylamine ether (C-27) are fully mixed to prepare a second treatment agent (II-1) composed of composition 1.

[0142] In addition, the description method of (polyoxyethylene)(polyoxypropylene) in the nonionic surfactant indicates the order of addition in the case of block polymers, and (polyoxyethylene)(polyoxypropylene) means a method in which ethylene oxide is first added and then propylene oxide is added (the same applies hereinafter).

[0143] (Second treatment agent (II-2) to (II-27))

[0144] The second treatment agents (II-2) to (II-27) were prepared in the same manner as the second treatment agent (II-1), and were mixed with the nonionic surfactant (C) and other components (D) in the ratios shown in Tables 3 and 4.

[0145] The type and content of the nonionic surfactant (C), and the type and content of other components (D) are shown in the "Nonionic surfactant (C)" column and the "Other components (D)" column of Tables 3 and 4, respectively.

[0146] [Table 3]

[0147]

[0148] [Table 4]

[0149]

[0150] The details of the nonionic surfactant (C) and other components (D) described in Tables 3 and 4 are as follows.

[0151] (Nonionic surfactant (C))

[0152] C-1: (polyoxyethylene)(polyoxypropylene)(m=2, n=5, block polymer) decyl ether

[0153] C-2: Polyoxyethylene (10 mol: represents the number of moles of alkylene oxide added (the same below)) C12-13 alkyl ether

[0154] C-3: Polyoxyethylene (15 mol) C12-13 alkyl ether

[0155] C-4: (polyoxyethylene) (polyoxypropylene) (m=6, n=2, random polymer) C12-13 alkyl ether

[0156] C-5: Polyoxyethylene (10 mol) C11-14 alkyl ether

[0157] C-6: Polyoxyethylene (15 mol) tridecyl ether

[0158] C-7: (polyoxyethylene) (polyoxypropylene) (m=7, n=5, block polymer) C11-14 alkyl ether

[0159] C-8: (polyoxyethylene)(polyoxypropylene)(m=6, n=2, random polymer) tridecyl ether

[0160] C-9: (polyoxyethylene)(polyoxypropylene)(m=5, n=5, block polymer) isodecyl ether

[0161] C-10: (polyoxypropylene)(polyoxyethylene)(m=2, n=5, block polymer) isodecyl ether

[0162] C-11: (polyoxyethylene)(polyoxypropylene)(m=5, n=5, block polymer) isotridecyl ether

[0163] C-12: Polyoxyethylene (10 mol) lauryl ether

[0164] C-13: Polyoxyethylene (15 mol) lauryl ether

[0165] C-14: Polyoxyethylene (9 mol) lauryl ether

[0166] C-15: (polyoxyethylene)(polyoxypropylene)(m=5, n=5, block polymer) dodecyl ether

[0167] C-16: Polyoxyethylene (10 mol) dodecylamine ether

[0168] C-17: Salt of polyoxyethylene (10 mol) dodecylamine ether and phosphoric acid

[0169] C-18: Polyoxyethylene (15 mol) dodecylamine ether

[0170] C-19: Polyoxyethylene (4 mol) dodecylamine ether

[0171] C-20: Polyoxyethylene (10 mol) stearyl ether

[0172] C-21: Polyoxyethylene (10 mol) octadecylamine ether

[0173] C-22: Polyoxyethylene (10 mol) lauryl ester

[0174] C-23: Polyoxyethylene (7 mol) coconut fatty acid ester

[0175] C-24: Polyoxyethylene (10 mol) coconut fatty acid ester

[0176] C-25: Polyoxyethylene (10 mol) coconut alkylamine ether

[0177] C-26: Polyoxyethylene (12 mol) coconut alkylamine ether

[0178] C-27: Polyoxyethylene (15 mol) coconut alkylamine ether

[0179] C-28: Polyoxyethylene (10 mol) oleyl ester

[0180] C-29: (Polyoxypropylene)(Polyoxyethylene)(Block addition) Propylene glycol ether (average molecular weight 3000, polyoxyethylene addition ratio 90 mol%)

[0181] C-30: (Polyoxypropylene)(Polyoxyethylene)(Block addition) Propylene glycol ether (average molecular weight 6000, polyoxyethylene addition ratio 80 mol%)

[0182] C-31: (Polyoxypropylene)(Polyoxyethylene)(Block addition) diglyceryl ether (average molecular weight 3000, polyoxyethylene addition ratio 65 mol%)

[0183] C-32: Polyoxypropylene polyoxyethylene (random addition) diglyceryl ether (average molecular weight 6000, polyoxyethylene addition ratio 90 mol%)

[0184] (Other ingredients (D))

[0185] D-1: Potassium Oleate

[0186] D-2: Potassium laurate

[0187] D-3: Potassium lactate

[0188] D-4: Potassium acetate

[0189] Test Category 4 (Preparation of treatment agents for synthetic fibers 1)

[0190] The composition containing the first treatment agent obtained in Test Type 2 and the second treatment agent obtained in Test Type 3 were mixed in the ratio shown in Table 5 and in the method described below to finally prepare a diluted solution of an emulsion-type synthetic fiber treatment agent.

[0191] (Example 13)

[0192] First, 40 g of cation exchange water was weighed and stirred at 500 rpm for 3 minutes in a water bath at 80° C. 5.0 g of the composition (XI-8) containing the first treatment agent (2.0 g of nonvolatile matter) was added dropwise to the beaker using a dropper and stirred for 5 minutes.

[0193] Next, 2.0 g of the second treatment agent (II-21) (2.0 g of nonvolatile component) was added dropwise using a dropper, and the mixture was stirred for 5 minutes.

[0194] In addition, at this time, the mixing ratio (%) of the first treatment agent is the mass of the first treatment agent / (the mass of the first treatment agent+the mass of the second treatment agent)×100=50(%). The mixing ratio (%) of the second treatment agent is the mass of the second treatment agent / (the mass of the first treatment agent+the mass of the second treatment agent)×100=50(%).

[0195] The beaker was removed from the water bath, and 33 g (i.e., appropriately adjusted to [80 (g) - 40 (g) - "the total amount of the composition containing the first treatment agent and the second treatment agent added (g)") of 25°C cation exchange water was added under stirring at room temperature and 500 rpm. After stirring for 3 minutes, cation exchange water was added to make the total mass of the dilution liquid 80 g. After stirring for another 1 minute, the obtained dilution liquid was a 5% dilution (non-volatile content 5%) of the dilution liquid of the treatment agent for synthetic fibers of Example 13.

[0196] (Examples 14 to 73)

[0197] Examples 14 to 73 were prepared in the same manner as Example 13 as 5% emulsions of dilution solutions of the synthetic fiber treatment agent, in which the first treatment agent and the second treatment agent were mixed in the ratio shown in Table 5.

[0198] The type and content of the first treatment agent, and the type and content of the second treatment agent are shown in the "First Treatment Agent" column and the "Second Treatment Agent" column of Table 5, respectively.

[0199] [Table 5]

[0200]

[0201] Test Category 5 (Preparation of treatment agents for synthetic fibers 2)

[0202] The components shown in Table 6 were mixed at a predetermined ratio without going through the steps of preparing the first treatment agent and the second treatment agent to obtain a treatment agent for synthetic fibers.

[0203] (Comparative Example 6)

[0204] The synthetic fiber treatment agent of Comparative Example 6 is prepared as shown in Table 6, which contains 49.5 parts of stearyl phosphate potassium salt (2.5) (A-1) as an organic phosphate salt (A), 0.5 parts of butyl phosphate potassium salt (1.8) (B-1) as an organic phosphate salt (B), 150 parts of the composition shown in Table 3 as a surfactant, and 150 parts of water as a solvent (S).

[0205] (Comparative Examples 7 to 53)

[0206] The synthetic fiber treatment agents of Comparative Examples 7 to 53 were prepared in the same manner as the synthetic fiber treatment agent of Comparative Example 6, and contained an organic phosphate salt (A), an organic phosphate salt (B), a surfactant, and a solvent (S) in the proportions shown in Table 6.

[0207] The type and content of the organic phosphate salt (A), the type and content of the organic phosphate salt (B), the type and content of the surfactant, and the type and content of the solvent (S) are shown in the "Organic phosphate salt (A)" column, the "Organic phosphate salt (B)" column, the "Surfactant" column, and the "Solvent (S)" column of Table 6, respectively. In addition, the concentration of the nonvolatile component in each synthetic fiber treatment agent is shown in the "Nonvolatile component concentration" column.

[0208] [Table 6]

[0209]

[0210] Test Category 6 (Evaluation of Room Temperature Stability)

[0211] 150 g of the compositions containing the first treatment agent of Examples 1 to 12, Comparative Examples 1 to 5, and the treatment agent for synthetic fibers of Comparative Examples 6 to 53 were placed in a 250 mL transparent plastic bottle. After being left to stand for 4 weeks at 25°C and 65 RH%, the room temperature stability was visually evaluated using the criteria described below. The results are shown in the "Room Temperature Stability" column of Tables 2 and 6.

[0212] Evaluation criteria for room temperature stability

[0213] ◎(Good): No delamination after 4 weeks

[0214] ×(Not acceptable): Delamination occurs after 4 weeks

[0215] Test category 7 (Evaluation of temperature stability)

[0216] The compositions containing the first treatment agent of Examples 1 to 12, Comparative Examples 1 to 5, and the treatment agents for synthetic fibers of Comparative Examples 6 to 53 were placed in a 250 mL transparent plastic bottle. The temperature stability under low temperature conditions of the following cycle was evaluated using a thermostat capable of executing a program. The temperature stability was visually evaluated using the criteria described below. The results are shown in the "temperature stability" column of Tables 2 and 6.

[0217] (1) 0°C for 12 hours; (2) 20°C for 12 hours; (3) The above (1) and (2) are carried out a total of 4 times.

[0218] Evaluation criteria for temperature stability

[0219] ◎(Good): No delamination or viscosity increase occurred

[0220] 0 (acceptable): No delamination occurs, but viscosity increases

[0221] ×(Not possible): Delamination occurs

[0222] Test Category 8 (Evaluation of operability)

[0223] 50 g of the composition containing the first treatment agent for synthetic fibers of Examples 1 to 12 and Comparative Examples 1 to 5 was placed in a 100 mL transparent plastic bottle. After humidity adjustment for 1 month in an atmosphere of 25°C x 40% RH, the workability was evaluated based on its properties. The results are shown in the "Workability" column of Table 2.

[0224] ·Operability evaluation criteria

[0225] ◎(Good): Tilt the plastic bottle 90 degrees and the liquid will flow out immediately

[0226] 0 (acceptable): The liquid flows within 5 minutes after the plastic bottle is tilted 90 degrees

[0227] ×(Not allowed): The liquid level does not change within 5 minutes after the plastic bottle is tilted 90 degrees (the liquid does not flow)

[0228] Test Category 9 (Adhesion of dilute solution of treatment agent to polyester staple fibers)

[0229] The diluted solution of the synthetic fiber treatment agent of each example obtained in Test Category 4 was further diluted to prepare a 0.5% emulsion of the synthetic fiber treatment agent. The prepared 0.5% emulsion was attached to the semi-dull polyester staple fibers with a fineness of 1.3×10-4 g / m (1.2 denier) and a fiber length of 38 mm obtained in the cotton making step by a spray method so that the attachment amount as a non-volatile component became 0.15%. Then, it was dried in a hot air dryer at 80°C for 2 hours, and then humidified overnight in an atmosphere of 25°C×40%RH to obtain the treated polyester staple fibers. In addition, as shown in Table 6, since the stability evaluation of Comparative Examples 6 to 53 was poor, the various spinning properties described later were not evaluated.

[0230] Test category 10 (Evaluation of carding passability)

[0231] 20 g of the treated polyester staple fibers obtained in Test Category 9 were placed in a constant temperature room at 20°C and 65% RH for 24 hours and then fed to a micro carding machine. The ratio of the discharge amount to the input amount was calculated and evaluated using the evaluation criteria described below. The results are shown in the "Card Passability" column of Table 5.

[0232] Evaluation criteria for carding passability

[0233] ◎(Good): Discharge volume more than 90%

[0234] ○ (acceptable): discharge volume is more than 80% and less than 90%

[0235] × (bad): the discharge amount x is less than 80%

[0236] Test Category 11 (Evaluation of elongation)

[0237] use Figure 1 The friction test device is schematically shown, and the ductility is evaluated in the following manner.

[0238] The diluted solution of the synthetic fiber treatment agent of each example obtained in Test Type 4 was further diluted to prepare a 1% emulsion of the synthetic fiber treatment agent.

[0239] use Figure 1 The friction test device 10 shown in the figure is used to evaluate the ductility in the following manner. Figure 1 As shown, a 1% emulsion 12 of a synthetic fiber treatment agent of each example is filled in a container 11 of a predetermined size. A cylindrical metal friction body 13 is arranged to be immersed in the 1% emulsion 12 in the container 11. Free rollers 14 and 15 are arranged in front and back positions of the metal friction body 13 in the upper part of the container 11. Polyester long fibers 16 pass through the free roller 14, the metal friction body 13, and the free roller 15 in this order.

[0240] Figure 1 The polyester long fiber 16 is stretched in the direction of arrow A at a speed of 50 m / min. In a thermostatic chamber maintained at 25°C and 65% RH, and the temperature of the 1% emulsion 12 is controlled at 20±0.5°C, the tension T1 of the upstream portion of the free roller 14 and the tension T2 of the downstream portion of the free roller 15 are measured. T2 / T1 is calculated, and the stretchability is evaluated using the following criteria. The results are shown in the "Stretchability" column of Table 5.

[0241] Evaluation criteria for scalability

[0242] ◎(Good): T2 / T1 = less than 6.00

[0243] ○ (acceptable): T2 / T1 = 6.00 or more and less than 6.30

[0244] × (bad): T2 / T1=6.30 or more

[0245] Test Category 12 (Evaluation of static electricity generation)

[0246] 10 kg of the treated polyester staple fibers obtained in Test Category 9 were fed to a pin carding machine (manufactured by Howa Industry Co., Ltd.) at 25°C × 40% RH and passed through the carding machine at a spinning speed of 140 m / min. The static electricity generation of the spun carded web was measured and evaluated using the following criteria. The results are shown in the "Static Electricity Generation" column of Table 5.

[0247] Evaluation criteria for static electricity generation

[0248] ◎(Good): Static electricity generation is less than 0.1kV

[0249] ○ (acceptable): The amount of static electricity generated is 0.1kV or more and less than 0.3kV

[0250] × (bad): static electricity generation 0.3 kV or more

[0251] The synthetic fiber treatment agents of Comparative Examples 6 to 53 are all prepared by pre-mixing nonionic surfactants (C) with a mixing ratio outside the scope of the present invention. It has been confirmed that the synthetic fiber treatment agents of Comparative Examples 6 to 53 are all poor in stability. On the other hand, it can be clearly seen from the evaluation results of Table 2 that the room temperature stability and temperature change stability can be improved by the composition containing the first treatment agent of the present invention. In addition, the fibers to which the synthetic fiber treatment agent comprising the composition containing the first treatment agent is given improved combing passability, elongation, and antistatic properties, and can give full play to various functions. In addition, it has been confirmed that the same effect can be obtained when the synthetic fiber treatment agent of each example is applied to polyethylene fibers of polyolefin fibers, that is, the combing passability, elongation, antistatic properties, etc. can be improved.

[0252] Description of Reference Numerals

[0253] 10 Friction test device

[0254] 11 Container

[0255] 12 1% lotion

[0256] 13. Metal friction body

[0257] 14, 15 Free Roller

[0258] 16 Polyester long fiber

Claims

1. A composition containing a first treatment agent for synthetic fibers, which is used together with a second treatment agent for synthetic fibers containing a nonionic surfactant (C) described later when in use, and is constituted as a reagent independent of the second treatment agent for synthetic fibers when not in use, comprising the first treatment agent for synthetic fibers described later and a solvent (S) described later, characterized in that: When the total content of the first treatment agent for synthetic fibers and the solvent (S) is 100 parts by mass, the first treatment agent for synthetic fibers is contained in an amount of 35 parts by mass or more and 55 parts by mass or less; A first treatment agent for synthetic fibers: comprising an organic phosphate salt (A) described below, an organic phosphate salt (B) described below, and optionally a nonionic surfactant (C) described below, The ratio of the total content of the organic phosphate salt (A) and the organic phosphate salt (B) to the content of the nonionic surfactant (C) is expressed as a mass ratio as (organic phosphate salt (A) + organic phosphate salt (B)) / nonionic surfactant (C) = 95 / 5 to 100 / 0, and When the total content ratio of the organic phosphate salt (A) and the organic phosphate salt (B) is set to 100 parts by mass, the organic phosphate salt (A) is contained in an amount of 80 parts by mass or more and less than 100 parts by mass and the organic phosphate salt (B) is contained in an amount of more than 0 parts by mass and less than 20 parts by mass, and the acid value detected from the first treatment agent for synthetic fibers by potentiometric titration is more than 0 mgKOH / g and less than 18 mgKOH / g; Solvent (S): a solvent having a boiling point of 105°C or less at atmospheric pressure, Organic phosphoric acid ester salt (A): an alkali metal salt of an organic phosphoric acid ester having a hydrocarbon group having 16 to 18 carbon atoms, Organic phosphoric acid ester salt (B): an alkali metal salt of an organic phosphoric acid ester having a hydrocarbon group having 4 to 8 carbon atoms, Nonionic surfactant (C): a nonionic surfactant having a (poly)oxyalkylene structure in the molecule.

2. The composition containing the first treating agent for synthetic fibers according to claim 1, wherein The first treatment agent for synthetic fibers has an acid value greater than 1 mgKOH / g and less than 16 mgKOH / g as detected from the first treatment agent for synthetic fibers by potentiometric titration.

3. The composition containing the first treatment agent for synthetic fibers according to claim 1 or 2, wherein: The solvent (S) is water.

4. A method for preparing a diluted solution of a synthetic fiber treatment agent, characterized in that: The composition containing the first treatment agent for synthetic fibers according to any one of claims 1 to 3 and the second treatment agent for synthetic fibers are added to water in a mass ratio of the first treatment agent for synthetic fibers / the second treatment agent for synthetic fibers=20 / 80 to 80 / 20, so that the nonvolatile component concentration is 0.01 mass % or more and 10 mass % or less.

5. The method for preparing a diluted solution of a synthetic fiber treating agent according to claim 4, wherein: Including step 1 and step 2 described below, Step 1: adding the composition containing the first treatment agent for synthetic fibers and the second treatment agent for synthetic fibers to first water to prepare a dilution of the treatment agent for synthetic fibers having a non-volatile component concentration of greater than 2% by mass and less than 10% by mass, Step 2: The diluted solution of the synthetic fiber treating agent prepared in step 1 is further added to the second water to prepare a diluted solution of the synthetic fiber treating agent having a nonvolatile component concentration of 0.01% by mass or more and 2% by mass or less.

6. The method for preparing a diluted solution of a synthetic fiber treating agent according to claim 5, wherein: The step 1 comprises the following steps: The composition containing the first treatment agent for synthetic fibers and the second treatment agent for synthetic fibers are added to water at 60° C. to 95° C., which accounts for 20% to 70% of the total amount of the first water, and then the remaining first water at 40° C. or less is added.

7. The method for preparing a diluted solution of a synthetic fiber treating agent according to claim 5, wherein: The step 1 comprises the following steps: The composition containing the first treatment agent for synthetic fibers is added to water at a temperature of 60°C to 95°C, which accounts for 20% to 70% of the total amount of the first water, and then the remaining first water at a temperature of 40°C or less is added, and then the second treatment agent for synthetic fibers is added.

8. A method for producing a synthetic fiber, characterized in that: The method comprises the steps of applying a diluted solution of a synthetic fiber treatment agent to the synthetic fiber, The diluted solution of the synthetic fiber treating agent is obtained by adding the composition containing the first synthetic fiber treating agent according to any one of claims 1 to 3 and the second synthetic fiber treating agent to water.

9. A method for producing short fibers, characterized in that: The method comprises the steps of applying a diluted solution of a synthetic fiber treatment agent to the short fibers, The diluted solution of the synthetic fiber treating agent is obtained by adding the composition containing the first synthetic fiber treating agent according to any one of claims 1 to 3 and the second synthetic fiber treating agent to water.

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