Elastic fiber treatment agent and use thereof

Abstract

Provided are: a treatment agent for elastic fibers, which has excellent degreasing properties in a refining step; an elastic fiber to which the treatment agent is applied; and a method for producing an elastic fiber to which the treatment agent is applied. The treatment agent for elastic fibers contains a mineral oil (A) having an aniline point of more than 110 DEG C and 170 DEG C or less, and the content of a silicone component (B) is 0 wt% to less than 50 wt%. Preferably, the content of the cycloalkane component in the mineral oil (A) is 0-60 wt%.

Description

Technical Field

[0001] The present invention relates to a treating agent for elastic fibers, elastic fibers to which the treating agent is applied, and a method for manufacturing elastic fibers to which the treating agent is applied. Background Art

[0002] Since elastic fibers have a stretchable property, in the yarn manufacturing process and post-processing process, when contacting friction bodies such as guiding members, the fiber / metal friction is large, and yarn breakage sometimes occurs. In addition, elastic fibers are usually wound into a cheese shape in the yarn manufacturing process to form a wound yarn body (hereinafter, sometimes also referred to as a cheese (in Japanese)), but since the fibers have viscoelasticity, they are prone to adhesion. Especially in the inner layer part of the wound yarn body, the adhesion sometimes increases over time due to the pressure applied during winding.

[0003] Therefore, in elastic fibers, in order to improve smoothness and anti-fiber adhesion properties, a treating agent for elastic fibers containing silicone components, mineral oil, ester oil, etc. as smoothing components is used. (Patent Documents 1 to 3)

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Patent Laid-Open No. 57-128276

[0007] Patent Document 2: Japanese Patent Laid-Open No. 58-104283

[0008] Patent Document 3: Japanese Patent Laid-Open No. 2001-115377 Summary of the Invention

[0009] Technical Problem to be Solved by the Invention

[0010] As a use of elastic fibers, elastic fibers are processed by covering, warping, etc. to become fabrics for use as fiber products, but are scoured and dyed in the high-order processing at this time. However, in fiber products containing elastic fibers to which a conventional treating agent for elastic fibers is attached, dye aggregation, uneven dyeing, etc. sometimes occur in the dyeing process. The reasons for dye aggregation, uneven dyeing, etc. in the dyeing process were investigated, and as a result, it was found that the treating agent for elastic fibers is generally composed mainly of hydrophobic components and has poor defatting property in the scouring process, and the treating agent remaining on the fibers causes dye aggregation, uneven dyeing, etc. in the subsequent dyeing process.

[0011] Therefore, an object of the present invention is to provide a treating agent for elastic fibers having excellent defatting property in the scouring process, elastic fibers to which the treating agent is applied, and a method for manufacturing elastic fibers to which the treating agent is applied.

[0012] Technical means for solving problems

[0013] In view of the above prior art background, the present inventor has conducted in-depth research and found that by using a treating agent for elastic fibers containing a specific mineral oil (A) and an optional silicone component (B) and having a specific content range of the silicone component (B), the above problems can be solved, and thus the present invention has been completed.

[0014] That is, the present invention includes the following aspects.

[0015] <1> A treating agent for elastic fibers, which contains a mineral oil (A), the aniline point of the mineral oil (A) is greater than 110 °C and 170 °C or less, and the content of the silicone component (B) is 0% by weight to less than 50% by weight.

[0016] <2> The treating agent for elastic fibers according to <1>, wherein the content of the naphthene component in the mineral oil (A) is 0% by weight to 60% by weight.

[0017] <3> The treating agent for elastic fibers according to <1> or <2>, wherein the ratio of the paraffin component is 50 parts by weight to 10,000 parts by weight with respect to 100 parts by weight of the naphthene component contained in the mineral oil (A).

[0018] <4> The treating agent for elastic fibers according to any one of <1> to <3>, wherein the treating agent for elastic fibers further contains at least one selected from organophosphates, organophosphate salts, fatty acids, and fatty acid metal salts.

[0019] <5> The treating agent for elastic fibers according to any one of <1> to <4>, wherein the content of magnesium element detected from the treating agent by ICP emission spectrometry is 50 ppm to 1000 ppm.

[0020] <6> The treating agent for elastic fibers according to any one of <1> to <5>, wherein the acid value of the treating agent for elastic fibers is 0.01 mgKOH / g to 20 mgKOH / g.

[0021] <7> An elastic fiber, which is obtained by applying the treating agent for elastic fibers according to any one of <1> to <6> to an elastic fiber main body.

[0022] <8> A method for manufacturing an elastic fiber, which includes a step of applying the treating agent for elastic fibers according to any one of <1> to <6> to an elastic fiber main body.

[0023] Advantages of the invention

[0024] The elastic fiber treated with the treating agent for elastic fibers of the present invention has excellent degreasing property in the refining process, so problems during dyeing can be reduced.

[0025] The elastic fiber produced by the manufacturing method of the elastic fiber of the present invention has excellent degreasing property in the refining process, so problems during dyeing can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram illustrating the evaluation method of anti-sticking property.

[0027] Figure 2 It is a schematic diagram illustrating the evaluation method of antistatic property. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, the treating agent for elastic fibers, the elastic fiber, and the manufacturing method of the elastic fiber of the present invention will be described in detail.

[0029] 〔Mineral oil (A)〕

[0030] The treating agent for elastic fibers of the present invention contains a mineral oil (A) having an aniline point greater than 110 °C and 170 °C or less. It is considered that by making the aniline point of the mineral oil (A) within this range, the affinity between the mineral oil (A) and the elastic fiber will not become too strong, and not only can the excessive penetration of the mineral oil (A) itself into the elastic fiber be inhibited, but also the excessive penetration of other treating agent components into the elastic fiber can be inhibited. Therefore, excellent degreasing property can be exhibited.

[0031] On the other hand, when the aniline point of the mineral oil (A) is 110 °C or less, it easily penetrates into the elastic fiber due to its strong affinity with the elastic fiber, so the degreasing property deteriorates. When it is greater than 170 °C, the compatibility with other treating agent components for elastic fibers deteriorates, and the stability as a treating agent deteriorates.

[0032] The aniline point of the mineral oil (A) is not particularly limited as long as it is greater than 110 °C and 170 °C or less. However, from the perspective of being able to further exhibit the degreasing property as the effect of this application, the upper limit of the aniline point is preferably 160 °C, more preferably 150 °C, further preferably 140 °C, and particularly preferably 135 °C. On the other hand, the lower limit of the aniline point is more preferably 113 °C, further preferably 115 °C, and particularly preferably 118 °C. In addition, for example, it is preferably 113 °C to 160 °C, more preferably 118 °C to 150 °C.

[0033] From the perspective of more effectively exerting the degreasing property as an effect of the present application, the content ratio of the mineral oil (A) in the treating agent for elastic fibers of the present invention is preferably 10% by weight to 100% by weight. The upper limit of this weight ratio is more preferably 95% by weight, further preferably 90% by weight, and particularly preferably 80% by weight. On the other hand, the lower limit of this weight ratio is more preferably 25% by weight, further preferably 40% by weight, and particularly preferably 50% by weight. Additionally, for example, it is more preferably 25% by weight to 90% by weight, and further preferably 40% by weight to 80% by weight.

[0034] The weight ratio of the naphthene component in the mineral oil (A) is not particularly limited. From the perspective of suppressing the deterioration of elastic fibers, it is preferably 0% by weight to 60% by weight. The upper limit of this weight ratio is more preferably 58% by weight, further preferably 55% by weight, and particularly preferably 52% by weight. On the other hand, the lower limit of this weight ratio is more preferably 5% by weight, further preferably 10% by weight, and particularly preferably 15% by weight. Additionally, for example, it is more preferably 5% by weight to 58% by weight, and further preferably 10% by weight to 52% by weight.

[0035] The weight ratio of the paraffin component in the mineral oil (A) is not particularly limited. From the perspective of suppressing the deterioration of elastic fibers, it is preferably 35% by weight to 100% by weight. The upper limit of this weight ratio is more preferably 95% by weight, further preferably 90% by weight, and particularly preferably 85% by weight. On the other hand, the lower limit of this weight ratio is more preferably 40% by weight, further preferably 50% by weight, and particularly preferably 60% by weight. Additionally, for example, it is more preferably 40% by weight to 95% by weight, and further preferably 50% by weight to 90% by weight.

[0036] The weight ratio of the aromatic component in the mineral oil (A) is not particularly limited. From the perspective of suppressing the deterioration of elastic fibers, it is preferably 0% by weight to 5% by weight. The upper limit of this weight ratio is more preferably 3% by weight, further preferably 2% by weight, and particularly preferably 1% by weight. On the other hand, the lower limit of this weight ratio is more preferably 0.01% by weight, further preferably 0.05% by weight, and particularly preferably 0.1% by weight. Additionally, for example, it is more preferably 0.01% by weight to 3% by weight, and further preferably 0.05% by weight to 2% by weight.

[0037] The ratio of the paraffin component is not particularly limited with respect to 100 parts by weight of the naphthene component contained in the mineral oil (A). From the viewpoint of suppressing the deterioration of elastic fibers, it is preferably 50 parts by weight to 10,000 parts by weight. The upper limit of this ratio is more preferably 1,000 parts by weight, further preferably 750 parts by weight, and particularly preferably 500 parts by weight. On the other hand, the lower limit of this ratio is more preferably 60 parts by weight, further preferably 80 parts by weight, and particularly preferably 100 parts by weight. In addition, for example, it is more preferably 60 parts by weight to 1,000 parts by weight, and further preferably 100 parts by weight to 750 parts by weight.

[0038] It should be noted that the weight ratios of the naphthene component, paraffin component, and aromatic component contained in the mineral oil (A) in the present invention are the values of C determined by the ring analysis n-d-M method specified in ASTM D3238. N %, C p %, C A %.

[0039] As the mineral oil (A), there is no particular limitation as long as it satisfies the above aniline point, and examples thereof include machine oil, spindle oil, liquid paraffin, etc. Among them, as the mineral oil, liquid paraffin is preferred for the reason of low generation of odor. One kind of mineral oil can be used, or two or more kinds can be used in combination.

[0040] [Silicone component (B)]

[0041] In the treating agent for elastic fibers of the present invention, the content of the silicone component (B) is 0% by weight to less than 50% by weight. It is considered that by setting the content of the silicone component (B) within this range, it is possible to suppress the situation where the silicone layer with high water repellency firmly covers the fiber surface and hinders the effect of the mineral oil (A) of the present invention, and thus excellent degreasing properties can be exhibited.

[0042] On the other hand, when this weight ratio is 50% by weight or more, although the mineral oil (A) is used, the silicone layer also firmly covers the fiber surface, or rather, a part of the silicone component penetrates into the fiber interior, resulting in poor degreasing properties. In addition, due to the excessive effect of silicone in reducing the friction between fibers / fibers, there is a case where the winding shape of the cheese becomes poor.

[0043] The upper limit of this content is preferably 45% by weight, more preferably 40% by weight, further preferably 35% by weight, and particularly preferably 30% by weight. On the other hand, the lower limit of this content is preferably 1% by weight, more preferably 5% by weight, further preferably 10% by weight, and particularly preferably 20% by weight. In addition, for example, it is preferably 1% by weight to 45% by weight, and more preferably 5% by weight to 40% by weight.

[0044] The silicone component (B) used in the present invention is not particularly limited, and examples thereof include: polydimethylsiloxane, polyalkylsiloxane, polyalkylphenylsiloxane, methylhydrogen silicone oil, modified silicone, silicone resin, etc. One kind of the silicone component (B) can be used, or two or more kinds can be used in combination. In addition, it may contain unreacted silanol groups, unreacted halogen groups, polymerization catalysts, cyclic siloxanes, etc. derived from raw materials.

[0045] The kinematic viscosity of the silicone component (B) at 20 °C is preferably 5 to 30 mm 2 / s, more preferably 5 to 25 mm 2 / s, and still more preferably 5 to 20 mm 2 / s. When the kinematic viscosity is 5 mm 2 / s or more, the volatilization of the silicone component is reduced, and when it is 30 mm 2 / s or less, the solubility of other components incorporated in the treatment agent is improved.

[0046] The average bonding amount of the siloxane bond (SiOR a R b : R a and R b each independently represents an organic group) of the silicone component (B) is preferably 3 to 900, more preferably 5 to 500, and still more preferably 7 to 200. The organic groups of R a and R b are hydrocarbon groups having 1 to 24 carbon atoms, and examples thereof include: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, isopentyl, hexyl, cyclopropyl, cyclohexyl, phenyl, benzyl, etc., and methyl and phenyl are particularly preferred.

[0047] The above-mentioned modified silicone generally refers to a silicone having the following structure: at least one of the two terminals, single terminal, side chain, and both ends of the side chain of polysiloxane such as dimethyl silicone (polydimethylsiloxane), at least one reactive (functional) group or non-reactive (functional) group is bonded.

[0048] As the above-mentioned modified silicone, more specifically, examples thereof include: alkyl-modified silicones such as modified silicones having a long-chain alkyl group (alkyl group having 6 or more carbon atoms, 2-phenylpropyl, etc.); ester-modified silicones which are modified silicones having an ester bond; polyether-modified silicones which are modified silicones having a polyoxyalkylene group (for example, polyoxyethylene group, polyoxypropylene group, polyoxyethyleneoxypropylene group, etc.); amino-modified silicones which are modified silicones having an aminopropyl group, N-(2-aminoethyl)aminopropyl group, etc.; methanol-modified silicones which are modified silicones having an alcoholic hydroxyl group; epoxy-modified silicones which are modified silicones having an epoxy group such as a glycidyl group or an alicyclic epoxy group; carboxyl-modified silicones which are modified silicones having a carboxyl group; mercapto-modified silicones which are modified silicones having a mercapto group, and the like.

[0049] The above-mentioned silicone resin refers to an organopolysiloxane resin, which means a silicone having a three-dimensional crosslinked structure. The silicone resin is usually composed of at least one structural unit selected from a monofunctional structural unit (M), a difunctional structural unit (D), a trifunctional structural unit (T), and a tetrafunctional structural unit (Q).

[0050] The above-mentioned silicone resin is not particularly limited. For example, silicone resins such as MQ silicone resin, MQT silicone resin, T silicone resin, DT silicone resin, etc. can be cited, and one of them can be used or two or more of them can be used in combination.

[0051] As the above-mentioned MQ silicone resin, for example, those containing R as a monofunctional structural unit can be cited. a R b R c SiO 1 / 2 (wherein, R a , R b and R c are all hydrocarbon groups) and a silicone resin containing SiO 4 / 2 as a tetrafunctional structural unit, and the like.

[0052] As the above-mentioned MQT silicone resin, for example, those containing R as a monofunctional structural unit can be cited. a R b R c SiO 1 / 2 (wherein, R a , R b and R c are all hydrocarbon groups), SiO 4 / 2 as a tetrafunctional structural unit, and RSiO 3 / 2 (wherein, R is a hydrocarbon group) as a trifunctional structural unit, and the like.

[0053] As the above-mentioned T silicone resin, for example, a silicone resin containing RSiO as a trifunctional structural unit can be cited. 3 / 2 (wherein R is a hydrocarbon group), etc. (the terminals thereof may be silanol groups or alkoxy groups in addition to hydrocarbon groups).

[0054] As the above-mentioned DT silicone resin, for example, R as a bifunctional structural unit can be cited. a R b SiO 2 / 2 (wherein R a and R b are both hydrocarbon groups) and RSiO as a trifunctional structural unit 3 / 2 (wherein R is a hydrocarbon group), etc.

[0055] As the hydrocarbon groups of R, R a , R b and R c they are hydrocarbon groups having 1 to 24 carbon atoms, and examples thereof include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, isopentyl, hexyl, cyclopropyl, cyclohexyl, phenyl, benzyl, etc., and methyl, ethyl, propyl, butyl, pentyl, and phenyl are particularly preferred.

[0056] When the silicone resin is contained, the compounding ratio of the silicone resin is preferably 0.1% by weight to 9% by weight, more preferably 0.2% by weight to 5% by weight, and further preferably 0.3% by weight to 3% by weight, based on the whole treating agent. When the above compounding ratio is 0.1% by weight or more, the effect of improving the anti-sticking property by adding the silicone resin is enhanced. On the other hand, when the above compounding ratio is 9% by weight or less, the collapse of the winding structure of the outer layer portion is further reduced.

[0057] 〔Smoothing components other than mineral oil (A) and silicone component (B)〕

[0058] In the treating agent for elastic fibers of the present invention, in addition to the above-described mineral oil (A) and silicone component (B), at least one or more selected from poly-α-olefins and ester oils can be used as smoothing components.

[0059] 〔Poly-α-olefin〕

[0060] Poly-α-olefin is a compound obtained by polymerizing α-olefin. From the viewpoint of obtaining good smoothness to metal, the kinematic viscosity of poly-α-olefin at 40 °C is preferably 10 to 100 mm 2 / s, more preferably 15 to 70 mm 2 / s, and further preferably 15 to 50 mm 2 / s. The kinematic viscosity of the poly-α-olefin compound is measured according to JIS K 2283.

[0061] The poly-α-olefin is preferably a trimer to octamer of an α-olefin having 6 to 18 carbon atoms. For example, the poly-α-olefin is centered on a trimer to octamer of α-decene (having 10 carbon atoms) or a trimer to octamer of α-dodecene (having 12 carbon atoms), and contains substances such as their dimers or pentamers and above.

[0062] As a preferred production example of the poly-α-olefin, an α-olefin having 6 to 18 carbon atoms is synthesized by using the low polymerization of ethylene or the thermal decomposition of wax, and the α-olefin is polymerized in 3 to 8 units and then subjected to a hydrogenation reaction for synthesis.

[0063] As the average number of carbon atoms per molecule of the poly-α-olefin, there is no particular limitation as long as it is within the above-mentioned kinematic viscosity range at 40 °C, preferably 18 to 150, more preferably 24 to 140, and further preferably 30 to 100.

[0064] When the treatment agent for elastic fibers of the present invention contains a poly-α-olefin, the weight ratio of the poly-α-olefin in the treatment agent is not particularly limited. From the perspective of obtaining good smoothness to metals, it is preferably 1% by weight to 80% by weight. The upper limit of this weight ratio is more preferably 70% by weight, further preferably 60% by weight, and particularly preferably 50% by weight. On the other hand, the lower limit of this weight ratio is more preferably 5% by weight, further preferably 10% by weight, and particularly preferably 20% by weight. Additionally, for example, it is more preferably 5% by weight to 70% by weight, and further preferably 10% by weight to 60% by weight.

[0065] As the poly-α-olefin, there is no particular limitation. For example, it may include: PAO201 with the trade name of Nippon Steel & Sumikin Chemical Co., Ltd., PAO401 with the trade name of Nippon Steel & Sumikin Chemical Co., Ltd., PAO601 with the trade name of Nippon Steel & Sumikin Chemical Co., Ltd., PAO801 with the trade name of Nippon Steel & Sumikin Chemical Co., Ltd., Lipolube 40 with the trade name of Lion Specialty Chemical Co., Ltd., Lipolube 60 with the trade name of Lion Specialty Chemical Co., Ltd., Lipolube 80 with the trade name of Lion Specialty Chemical Co., Ltd., etc.

[0066] [Ester oil]

[0067] In the treatment agent for elastic fibers of the present invention, as a smoothing component other than the above-described mineral oil (A) and silicone component (B), an ester oil can be used.

[0068] When the treating agent for elastic fibers of the present invention contains ester oil, the weight ratio of the ester oil in the treating agent is not particularly limited, and is preferably 1% by weight to 80% by weight. The upper limit of this weight ratio is more preferably 70% by weight, further preferably 60% by weight, and particularly preferably 50% by weight. On the other hand, the lower limit of this weight ratio is more preferably 5% by weight, further preferably 10% by weight, and particularly preferably 20% by weight. Additionally, for example, it is more preferably 5% by weight to 70% by weight, and further preferably 10% by weight to 60% by weight.

[0069] As the ester oil, it is sufficient that it is at least one selected from esters of monohydric alcohols and monocarboxylic acids, esters of monohydric alcohols and polycarboxylic acids, and esters of polyhydric alcohols and monocarboxylic acids, and there is no particular limitation. As the monohydric alcohol, the monohydric aliphatic alcohols, aromatic alcohols, alicyclic alcohols, phenols, etc. described below can be used. Among them, at least one selected from monohydric aliphatic alcohols and aromatic alcohols is preferred.

[0070] As the monohydric aliphatic alcohol, there is no particular limitation, and for example, octanol, 2-ethylhexanol, 1-nonanol, 1-decanol, undecanol, lauryl alcohol, tridecanol, isotridecanol, myristyl alcohol, pentadecanol, 1-hexadecanol, palmityl alcohol, 1-heptadecanol, stearyl alcohol, oleyl alcohol, isostearyl alcohol, nonadecanol, 1-eicosanol, docosanol, 1-tetracosanol, brassidic alcohol, tetracosanol, etc. can be cited. When the above monohydric aliphatic alcohol has a branched chain, the number of branched chains, the length of the branched chain, and the position of the branched chain are not particularly limited.

[0071] As the aromatic alcohol, phenol, benzyl alcohol, etc. can be cited.

[0072] As the alicyclic alcohol, cyclooctanol, cyclododecanol, cyclohexanol, cycloheptanol, cyclopentanol, menthol, etc. can be cited.

[0073] As the polyhydric alcohol, there is no particular limitation, and for example, ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, 1,3-propanediol, 1,4-butanediol, neopentyl glycol, 1,5-pentanediol, 3-methyl-1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 2-methyl-1,8-octanediol, cyclohexanediol, glycerol, diglycerol, triglycerol, tetraglycerol, hexaglycerol, decaglycerol, polyglycerol, sorbitol, trimethylolpropane, pentaerythritol, etc. can be cited.

[0074] As the monocarboxylic acid, the monohydric aliphatic carboxylic acids, aromatic carboxylic acids, hydroxycarboxylic acids, etc. described below can be used. Among them, monohydric aliphatic carboxylic acids and aromatic carboxylic acids are preferred.

[0075] As the monocarboxylic acid, there is no particular limitation, and examples thereof include: valeric acid, caproic acid, enanthic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, palmitoleic acid, margaric acid, stearic acid, oleic acid, isostearic acid, isoleic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, benzoic acid, etc.

[0076] As the polycarboxylic acid, there is no particular limitation, and examples thereof include: oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid, phthalic acid, trimellitic acid, pyromellitic acid, citric acid, isocitric acid, etc.

[0077] As specific examples of the ester oil, there is no particular limitation, and examples thereof include: heptyl valerate, heptyl caproate, octyl caproate, cetyl octanoate, isooctyl laurate, isopropyl myristate, isopropyl palmitate, isostearyl palmitate, butyl stearate, octyl stearate, oleyl laurate, isotridecyl stearate, octyl stearate, isooctyl stearate, tridecyl stearate, isobutyl stearate, methyl oleate, isobutyl oleate, heptyl oleate, oleyl oleate, polyethylene glycol dilaurate, polyethylene glycol dimyristate, polyethylene glycol dioleate, polyethylene glycol distearate, polypropylene glycol dilaurate, polypropylene glycol dimyristate, polypropylene glycol dioleate, polypropylene glycol distearate, dicetyl oxalate, diisooctyl malonate, dilauryl succinate, diisodecyl adipate, isononyl adipate, dioctyl adipate, diisooctyl fumarate, diisooctyl phthalate, dioctyl phthalate, dinonyl phthalate, diisodecyl phthalate, bisundecyl phthalate, triisooctyl trimellitate, triisobutyl trimellitate, triisodecyl trimellitate, triisostearyl trimellitate, glyceryl triisooctanoate, glyceryl trilaurate, glyceryl trimyristate, glyceryl trioleate, glyceryl tristearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan trioleate, sorbitan tristearate, sorbitan sesquioleate, sorbitan trilaurate, sorbitan tristearate, sorbitan tripalmitate, etc.

[0078] [Fatty acids and fatty acid metal salts]

[0079] The treating agent for elastic fibers of the present invention may further contain at least one selected from fatty acids and fatty acid metal salts. When the treating agent contains at least one selected from fatty acids and fatty acid metal salts, the total weight ratio of the fatty acids and fatty acid metal salts in the treating agent is not particularly limited, and is preferably 0.001% by weight to 5% by weight. If the total weight ratio of the fatty acids and fatty acid metal salts is within the above range, there is a tendency for excellent anti-sticking property in the inner layer of the cheese. The upper limit of this weight ratio is more preferably 3% by weight, further preferably 1.5% by weight, and particularly preferably 1% by weight. On the other hand, the lower limit of this weight ratio is more preferably 0.01% by weight, further preferably 0.05% by weight, and particularly preferably 0.15% by weight. In addition, for example, it is more preferably 0.01% by weight to 3% by weight, and further preferably 0.05% by weight to 1.5% by weight.

[0080] Examples of the fatty acids and fatty acid metal salts include fatty acids having 8 to 22 carbon atoms and / or their monovalent to trivalent metal salts.

[0081] Examples of the fatty acids include 2-ethylhexanoic acid, lauric acid, palmitic acid, myristic acid, stearic acid, hydroxystearic acid, behenic acid, tribehenic acid, etc.

[0082] Examples of the fatty acid metal salts include calcium laurate, calcium palmitate, barium myristate, magnesium myristate, magnesium palmitate, magnesium laurate, magnesium stearate, magnesium 2-ethylhexanoate, zinc behenate, aluminum tribehenate, calcium stearate, calcium 2-ethylhexanoate, aluminum stearate, aluminum palmitate, barium stearate, zinc caprate, and zinc stearate, etc.

[0083] As these fatty acids and fatty acid metal salts, from the perspective of the anti-sticking property of the inner layer of the cheese, at least one selected from fatty acids having 12 to 18 carbon atoms and their alkaline earth metal salts is preferred, at least one selected from lauric acid, myristic acid, palmitic acid, stearic acid and their alkaline earth metal salts is more preferred, at least one selected from magnesium laurate, magnesium myristate, magnesium palmitate and magnesium stearate is further preferred, and at least one selected from magnesium myristate, magnesium palmitate and magnesium stearate is particularly preferred. These fatty acids and fatty acid metal salts can be used singly or in combination of two or more.

[0084] [Organic phosphates and organic phosphate salts]

[0085] The treating agent for elastic fibers of the present invention may further contain at least one selected from organic phosphates and organic phosphate salts. When the treating agent contains at least one selected from organic phosphates and organic phosphate salts, the weight ratio of the organic phosphate and the organic phosphate salt in the treating agent is not particularly limited, and is preferably 0.1% by weight to 10% by weight. If the weight ratio of the organic phosphate and the organic phosphate salt is within the above range, there is a tendency for excellent antistatic properties. The upper limit of this weight ratio is more preferably 5% by weight, further preferably 3% by weight, and particularly preferably 1% by weight. On the other hand, the lower limit of this weight ratio is more preferably 0.2% by weight, further preferably 0.4% by weight, and particularly preferably 0.5% by weight. In addition, for example, it is more preferably 0.2% by weight to 5% by weight, and further preferably 0.4% by weight to 3% by weight.

[0086] The organic phosphate is not particularly limited as long as it contains at least one or more hydrocarbon groups or oxyalkylene groups in the molecule. For example, hexyl phosphate, octyl phosphate, decyl phosphate, dodecyl phosphate, tetradecyl phosphate, hexadecyl phosphate, octadecyl phosphate, docosyl phosphate, tris(octacosyl) phosphate, octadecenyl phosphate, 2-ethylhexyl phosphate, isoheptyl phosphate, isooctyl phosphate, isononyl phosphate, isodecyl phosphate, isoundecyl phosphate, isododecyl phosphate, isotridecyl phosphate, isotetradecyl phosphate, isohexadecyl phosphate, isooctadecyl phosphate, tert-butyl phosphate, benzyl phosphate, octylphenyl phosphate, cyclohexyl phosphate, polyoxyethylene 5 mol adduct hexadecyl ether phosphate, polyoxyethylene 15 mol adduct hexadecyl ether phosphate, polyoxyethylene 7 mol adduct polyoxypropylene 3.5 mol adduct secondary alkyl ether phosphate, polyoxyethylene 2 mol polyoxypropylene 5 mol adduct dodecyl phosphate, polyoxyethylene 3 mol adduct secondary alkyl ether phosphate, polyoxyethylene 2 mol adduct dodecyl ether phosphate, polyoxyethylene 4 mol adduct phenol phosphate, etc. can be cited. One kind of organic phosphate can be used, or two or more kinds can be used in combination.

[0087] Examples of the organic phosphate salt include alkali metal salts and / or alkaline earth metal salts.

[0088] As the alkali metals and alkaline earth metals that form salts with the organic phosphate, sodium, potassium, calcium, and magnesium are preferred, calcium and magnesium are more preferred, and magnesium is particularly preferred.

[0089] 〔Other components〕

[0090] From the perspective of improving the performance of smoothness, unwinding property, and antistatic property, and improving the winding shape of cheese, the treating agent for elastic fibers of the present invention may further contain at least one other component selected from higher alcohols, polyhydric alcohols, organic amines, nonionic surfactants, cationic surfactants, and anionic surfactants, other than the components described above. One or more than two kinds of other components can be used.

[0091] The higher alcohol is not particularly limited, and linear and / or branched alcohols having 6 to 30 carbon atoms can be cited. Specific examples include: linear alcohols such as hexanol, heptanol, octanol, nonanol, decanol, undecanol, dodecanol, tridecanol, tetradecanol, pentadecanol, hexadecanol, heptadecanol, octadecanol, nonadecanol, eicosanol, heneicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, heptacosanol, octacosanol, nonacosanol, and triacontanol; branched-chain alkanols such as 2-ethylhexanol, 2-propylheptanol, 2-butyl octanol, 1-methylheptadecanol, 2-hexyloctanol, 1-hexylheptanol, isodecanol, isotridecanol, 3,5,5-trimethylhexanol; linear alkenols such as hexenol, heptenol, octenol, nonenol, decenol, undecenol, dodecenol, tridecenol, tetradecenol, pentadecenol, hexadecenol, pentadeceneol, hexadeceneol, heptadeceneol, octadeceneol, nonadeceneol, eicosenol, docosenol, tetracosenol, pentacosenol, hexacosenol, heptacosenol, octacosenol, nonacosenol, and triacontenol; branched-chain alkenols such as isohexenol, 2-ethylhexenol, isotridecenol, 1-methylheptadecenol, 1-hexylheptenol, isotridecenol, and isooctadecenol.

[0092] As the polyhydric alcohol, the above polyhydric alcohol can be used.

[0093] The organic amine is not particularly limited as long as it is an organic amine having at least one hydrocarbon group or oxyalkylene group in the molecule. For example, laurylamine, myristylamine, cetylamine, stearylamine, oleylamine, diethylamine, dioctylamine, distearylamine, methyl stearylamine, polyoxypropylene-added laurylamine, polyoxyethylene-added laurylamine, polyoxyethylene-added stearylamine, polyoxyethylene-added oleylamine, monoethanolamine, diethylethanolamine, dibutylethanolamine, triethanolamine, lauryl ethanolamine, trioctylamine, dimethyllaurylamine, dimethylmyristylamine, dimethylstearylamine, etc. can be cited.

[0094] As the nonionic surfactant, there is no particular limitation. For example, it may include: polyoxyalkylene alkyl ethers having an alkyl group with 8 to 22 carbon atoms (the oxyalkylene is 1 to 20 moles, the oxyalkylene is oxyethylene and / or oxypropylene, random and / or block), sorbitan fatty acid esters, oxyalkylene adducts of sorbitan fatty acid esters (the oxyalkylene is 1 to 20 moles, the oxyalkylene is oxyethylene and / or oxypropylene, random and / or block), etc., alkylene oxide adducts of polyhydric alcohols, alkylphenols having an alkyl group with 6 to 22 carbon atoms, oxyalkylene adducts of alkylphenols having an alkyl group with 6 to 22 carbon atoms (the oxyalkylene is 1 to 20 moles, the oxyalkylene is oxyethylene and / or oxypropylene, random and / or block), fatty acid polyoxyalkylene glycol esters (the oxyalkylene is 1 to 20 moles, the oxyalkylene is oxyethylene and / or oxypropylene, random and / or block), etc. One or more of these nonionic surfactants can be used.

[0095] As the above-mentioned cationic surfactant, there is no particular limitation. For example, there are the above-mentioned organic amines and / or their salts, and quaternary ammonium salts. Specifically, as the quaternary ammonium salts, it can be exemplified: didecyldimethylammonium salts, decyltrimethylammonium salts, dioctyldimethylammonium salts, octyltrimethylammonium salts, etc. One or more of these cationic surfactants can be used.

[0096] As the anionic surfactant, there is no particular limitation. For example, there are: alkane sulfonic acids and / or their salts, dialkyl sulfosuccinic acids and / or their salts, alkylbenzene sulfonic acids and / or their salts, alkylnaphthalene sulfonic acids and / or their salts, alkyl sulfates and / or their salts, polyoxyethylene alkyl ether sulfates and / or their salts, polyoxyethylene alkyl ether acetates and / or their salts, etc. Specifically, it can be exemplified: alkane sulfonic acids and / or their salts having an alkyl group with 6 to 22 carbon atoms, dialkyl sulfosuccinate esters and / or their salts, alkylbenzene sulfonic acids and / or their salts having an alkyl group with 6 to 22 carbon atoms, alkyl sulfates and / or their salts having an alkyl group with 1 to 20 carbon atoms, polyoxyethylene alkyl ether sulfates and / or their salts having an alkyl group with 6 to 22 carbon atoms, polyoxyethylene alkyl ether acetates and / or their salts having an alkyl group with 6 to 22 carbon atoms, etc. One or more of these anionic surfactants can be used.

[0097] 〔Treatment Agent for Elastic Fibers〕

[0098] The treatment agent for elastic fibers of the present invention contains the mineral oil (A) as described above. The aniline point of the mineral oil (A) is greater than 110 °C and 170 °C or less, and the content of the organosilicon component (B) is 0 wt% to less than 50 wt%.

[0099] With respect to 100 parts by weight of the mineral oil (A) contained in the treating agent for elastic fibers of the present invention, the weight ratio of the silicone component (B) is not particularly limited, and from the viewpoint of obtaining excellent degreasing property, it is preferably 5 to 80 parts by weight. The upper limit of this weight ratio is more preferably 70 parts by weight, further preferably 50 parts by weight, and particularly preferably 40 parts by weight. On the other hand, the lower limit of this weight ratio is more preferably 10 parts by weight, further preferably 20 parts by weight, and particularly preferably 25 parts by weight. In addition, for example, it is more preferably 10 to 70 parts by weight, and further preferably 20 to 50 parts by weight.

[0100] From the viewpoint of the handle of the cheese, the treating agent for elastic fibers of the present invention preferably further contains at least one selected from organophosphates, organophosphate salts, fatty acids, and fatty acid metal salts. The content of organophosphates, organophosphate salts, fatty acids, and fatty acid metal salts in the treating agent is not particularly limited, and is preferably 0.001 to 10% by weight. The upper limit of this content is more preferably 5% by weight, further preferably 3% by weight, and particularly preferably 1% by weight. On the other hand, the lower limit of this content is more preferably 0.01% by weight, further preferably 0.05% by weight, and particularly preferably 0.15% by weight. In addition, for example, it is more preferably 0.01 to 5% by weight, and particularly preferably 0.1 to 3% by weight. Organophosphates, organophosphate salts, fatty acids, and fatty acid metal salts can be used singly or in combination of two or more.

[0101] From the aspect of excellent anti-sticking property of the inner layer of the cheese, the treating agent for elastic fibers of the present invention preferably has a magnesium element content detected by ICP emission spectrometry of 50 to 1000 ppm. The upper limit of this content is more preferably 850 ppm, further preferably 700 ppm, and particularly preferably 500 ppm. On the other hand, the lower limit of this content is more preferably 60 ppm, further preferably 70 ppm, and particularly preferably 80 ppm. In addition, for example, it is more preferably 60 to 850 ppm, and further preferably 70 to 700 ppm. It should be noted that the method for measuring the content of magnesium element by ICP emission spectrometry is based on the method described in the examples.

[0102] The magnesium element contained in the treating agent for elastic fibers of the present invention preferably comes from a magnesium-containing compound. As the magnesium-containing compound, there is no particular limitation as long as it is a compound containing magnesium element. For example, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium sulfonate, hydrotalcite, magnesium salts of the above fatty acids, magnesium salts of organophosphates, etc. can be cited. From the viewpoint of more excellent anti-sticking property of the inner layer of the cheese, magnesium salts of fatty acids and magnesium salts of organophosphates are preferred.

[0103] From the perspective of obtaining excellent antistatic properties, the acid value of the treating agent for elastic fibers of the present invention is preferably 0.01 mgKOH / g to 20 mgKOH / g. The upper limit of this acid value is more preferably 15 mgKOH / g, further preferably 10 mgKOH / g, and particularly preferably 5 mgKOH / g. On the other hand, the lower limit of this acid value is more preferably 0.1 mgKOH / g, further preferably 0.5 mgKOH / g, and particularly preferably 1 mgKOH / g. Additionally, for example, it is more preferably 0.1 mgKOH / g to 15 mgKOH / g, and further preferably 0.5 mgKOH / g to 10 mgKOH / g. It should be noted that the method for measuring the acid value of the treating agent for elastic fibers is based on the method described in the examples.

[0104] From the perspective of moderately suppressing the excessive reduction of fiber / fiber interfacial friction caused by the treating agent, the water content contained in the treating agent for elastic fibers of the present invention is preferably 0 ppm to 1000 ppm. The upper limit of this water content is more preferably 500 ppm, further preferably 300 ppm, and particularly preferably 200 ppm. On the other hand, the lower limit of this water content is more preferably 1 ppm, further preferably 10 ppm, and particularly preferably 100 ppm. Additionally, for example, it is more preferably 1 ppm to 500 ppm, and further preferably 10 ppm to 300 ppm. It should be noted that the method for measuring the water content of the treating agent for elastic fibers is based on the method described in the examples.

[0105] Regarding the kinematic viscosity of the treating agent for elastic fibers of the present invention at 30 °C, there is no particular limitation. From the perspective of yarn manufacturing stability, it is preferably 8 to 40 mm 2 / s, more preferably 9 to 30 mm 2 / s, and further preferably 9 to 20 mm 2 / s.

[0106] 〔Manufacturing Method of Treating Agent for Elastic Fibers〕

[0107] The manufacturing method of the treating agent for elastic fibers of the present invention is not particularly limited, and known methods can be adopted. For example, it can be a method of pre-mixing several components and then mixing with other components, or a method of mixing all components at once. Additionally, when the treating agent for elastic fibers of the present invention contains a metal salt of a higher fatty acid, the already pulverized metal salt of a higher fatty acid can be mixed with a smoothing component, etc. for manufacturing, or the metal salt of a higher fatty acid can be mixed in a smoothing component, etc., and pulverized into a specified average particle size using a conventionally known wet pulverizer for manufacturing.

[0108] 〔Elastic Fibers〕

[0109] The elastic fiber of the present invention is obtained by applying the treating agent for elastic fiber of the present invention to the elastic fiber main body. The adhesion ratio of the treating agent for elastic fiber in the whole elastic fiber is not particularly limited, preferably 0.1% by weight to 15% by weight, more preferably 0.5% by weight to 10% by weight. As a method for applying the treating agent for elastic fiber of the present invention to the elastic fiber main body, there is no particular limitation, and known methods can be adopted.

[0110] The elastic fiber (elastic fiber main body) of the present invention is an elastic fiber using polyether-based polyurethane, polyester-based polyurethane, polyether ester elastomer, polyester elastomer, polyethylene elastomer, polyamide elastomer, etc., and its elongation rate is usually 100% or more. If the elongation rate is 300% or more, it can be used in any application of warp knitting, circular knitting, and covering, so it is preferred.

[0111] As the elastic fiber of the present invention, there is no particular limitation, and it is preferably composed of a polyurethane or polyurethane urea obtained by reacting PTMG, polyester diol with an organic diisocyanate and then chain-extending with 1,4-butanediol, ethylenediamine, propanediamine, pentanediamine, etc. For example, a polyurethane urea elastic fiber can be manufactured as follows: Prepare polytetramethylene glycol (PTMG) with a molecular weight of 1000 to 3000 and diphenylmethane diisocyanate (MDI), and react them at a PTMG / MDI = 1 / 2 to 1 / 1.5 (molar ratio) in a solvent such as dimethylacetamide or dimethylformamide, and spin a 20 to 40% solution of the polyurethane urea polymer obtained by chain-extending with a diamine such as ethylenediamine and propanediamine at a spinning speed of 400 to 1200 m / min using dry spinning. The suitable fineness of the elastic fiber main body is not particularly limited.

[0112] The elastic fiber main body of the present invention may also contain inorganic substances such as titanium oxide, magnesium oxide, hydrotalcite, zinc oxide, and divalent metal soaps. Examples of divalent metal soaps include: calcium 2-ethylhexanoate, calcium stearate, calcium palmitate, magnesium stearate, magnesium palmitate, magnesium laurate, barium stearate, zinc caprate, zinc behenate, and zinc stearate. One or more inorganic substances can be used.

[0113] When the elastic fiber main body contains inorganic substances, sometimes the uniform unwinding property is poor, but by applying the treating agent of the present invention to the elastic fiber main body, the uniform unwinding property can be made good. Therefore, the treating agent for elastic fiber of the present invention is suitable for the case where the elastic fiber main body contains inorganic substances. The content of the inorganic substance in the elastic fiber main body is not particularly limited, preferably 0.01% by weight to 5% by weight, more preferably 0.1% by weight to 3% by weight.

[0114] As the use of the elastic fiber of the present invention, processed yarns such as covered yarns such as core-sheath yarn (CSY), single covered yarn, ply yarn (PLY), air covered yarn, etc. can be used, or it can be used as a fabric through circular knitting, tricot knitting, etc. In addition, for the purpose of comfort, these processed yarns and fabrics are used to impart elasticity to stretchable products such as stockings, socks, underwear, swimsuits, etc., or outerwear such as jeans and suits. In addition, it has recently been applied to disposable diapers.

[0115] 〔Manufacturing method of elastic fiber〕

[0116] The manufacturing method of the elastic fiber of the present invention is obtained by supplying oil to the elastic fiber with a treating agent for the elastic fiber of the present invention. As the method of supplying oil of the treating agent, it is preferably a method of attaching it to the elastic fiber in the spinning process of the elastic fiber by the net oil supply method without dilution. As the attaching method, for example, known methods such as roll oil supply method, guide oil supply method, and spray oil supply method can be applied. Generally, the oil supply roll is usually located between the spindle and the winding traverse. Among them, it is preferable to attach the elastic fiber treating agent to the elastic fiber (for example, polyurethane-based elastic fiber) by the oil supply roll located between the stretching rolls to achieve the effect of this application.

[0117] Examples

[0118] Hereinafter, the present invention will be specifically described by way of examples and comparative examples, but the present invention is not limited to the examples described herein. It should be noted that the "percentage (%)" and "parts" shown in the following examples represent "weight %" and "weight parts" unless otherwise specified. It should be noted that in the examples and comparative examples, the evaluation of each characteristic of the elastic fiber treating agent was carried out according to the following methods.

[0119] (Determination method of aniline point)

[0120] The aniline point of mineral oil (A) was measured according to JIS K 2256.

[0121] (Determination method for measuring the magnesium element content in the treating agent based on ICP emission spectrometry)

[0122] (1) Pretreatment

[0123] Weigh 5 g of the elastic fiber treating agent in a platinum crucible, carbonize it on an electric heating heater, add 4 ml of sulfuric acid (for harmful metal determination), and ash it in an electric furnace. Finally, add 0.5 ml of nitric acid (for harmful metal determination) and ultrapure water, and make up the volume to 50 ml to prepare a measurement sample.

[0124] (2) Calibration curve

[0125] Prepare a calibration curve by supplying 10 ppm standard solution and 100 ppm standard solution with known pre-adjusted magnesium concentrations to an ICP (measurement device name: ICPS-8100 manufactured by Shimadzu Corporation, ICP emission spectrometer).

[0126] (3) Measurement

[0127] Supply the measurement sample prepared in (1) above to an ICP (measurement instrument name: ICPS-8100 manufactured by Shimadzu Corporation, ICP emission spectrometer), and use the calibration curve prepared in (2) above to measure the content of magnesium element in the treating agent for elastic fibers.

[0128] (Method for measuring acid value)

[0129] The acid value of the treating agent is measured in accordance with JIS K 2501.

[0130] (Method for measuring moisture)

[0131] The moisture content of the treating agent is measured in accordance with JIS K 0068.

[0132] (Anti-blocking property)

[0133] In Figure 1 , place the cheese (1) of the fiber coated with the treating agent on the unwinding side of the unwinding speed ratio measuring machine, and set the winding side paper tube (2). After setting the winding speed to a constant speed, start the rollers (3) and (4) simultaneously. In this state, hardly any tension is applied to the yarn (5), so the yarn adheres to the cheese and does not separate, and the unwinding point (6) is in Figure 1 the state shown. By changing the unwinding speed, the unwinding point (6) at which the yarn (5) unwinds from the cheese changes, so set the unwinding speed so that this point coincides with the contact point (7) between the cheese and the rollers. The unwinding speed ratio is calculated by the following formula (1). The smaller this value, the better the unwinding property.

[0134] Unwinding speed ratio (%) = ((Winding speed - Unwinding speed) / Unwinding speed) × 100 Formula (1)

[0135] Take the unwinding speed ratio (%) at the moment when the winding amount of the cheese is 50 g or less as the unwinding speed ratio (%) of the inner layer part, evaluate the anti-blocking property by the following index, and regard ○ or above as qualified.

[0136] (Index)

[0137] ◎: Unwinding speed ratio is less than 100 (very good)

[0138] ○: Unwinding speed ratio is 100 or more and less than 130 (good)

[0139] △: Unwinding speed ratio is 130 or more and less than 180 (slightly worse)

[0140] ×: Unwinding speed ratio is 180 or more (poor)

[0141] (Antistatic property evaluation method)

[0142] As an alternative to the antistatic property evaluation, the static electricity generation amount measurement method was used. Figure 2 In the embodiment, a Kasuga-type static electricity measuring device was set at the position (17), and the static electricity amount generated under the conditions of 20°C and 60%RH was measured while winding at 100 m / min.

[0143] Evaluation was performed according to the following evaluation criteria, and ○ or higher was considered as passing.

[0144] ◎: Less than 4kV (very good)

[0145] ○: 4 kV or more and less than 10 kV (good)

[0146] △: 10kV or more and less than 15kV (slightly worse)

[0147] ×: 15kV or above (defective)

[0148] [Degreasing property evaluation method]

[0149] An Okuma single-cylinder circular knitting machine (30 inches, 24 needles) was used to align 8 elastic fibers with a draft ratio of 1.7 times to 1 mouth from the fiber bobbin yarn given a treatment agent, and 3 nylon 6 fibers (Mira Cosmo (registered trademark) manufactured by Toray Industries, Ltd.) 56 dtex / 17 filaments were used in a manner that each fiber corresponds to 1 mouth, and a total of 4 mouths were aligned to produce an interwoven knitted fabric (Japanese: 交織織地).

[0150] Next, as a scouring agent, polyoxyethylene 9 mol addition lauryl ether and water were placed in a micro-color special dyeing tank (manufactured by Techsum Giken Co., Ltd.), and Mapon A-20 (manufactured by Matsumoto Yushi Pharmaceutical Co., Ltd.) was added as a chelating agent to prepare a scouring bath with a scouring agent concentration of 5 g / L.

[0151] Then, the interwoven knitted fabric is put into a scouring bath and treated with micro-color. The bath ratio (weight of interwoven knitted fabric: weight of dyeing bath) is 1:10. The scouring bath is heated to 90°C and maintained at 90°C for 30 minutes. Then, the scouring bath is cooled and discarded, and hot water washing and water washing are performed for 1 minute. The obtained interwoven knitted fabric is dehydrated by centrifugal separation and dried at 90°C for 1 hour to obtain a scour interwoven knitted fabric.

[0152] For the obtained refined interwoven knitted fabric, it was extracted with n-hexane for 2 hours using a Soxhlet extractor, and the residual fat content was measured. Here, the residual fat content refers to the weight percentage of the treatment agent after fiber extraction.

[0153] It should be noted that the oil content in the Soxhlet extraction of the interwoven knitted fabric (gray fabric) before the above-mentioned refining treatment was 1.98%. Then, the oil agent shedding rate (%) was calculated by the following formula (2).

[0154] [Equation 1]

[0155]

[0156] Finally, the evaluation was carried out according to the following evaluation criteria, and ○ or above was regarded as qualified for defatting.

[0157] ◎: The oil agent shedding rate is 80% or more

[0158] ○: The oil agent shedding rate is 50% or more and less than 80%

[0159] △: The oil agent shedding rate is 30% or more and less than 50%

[0160] ×: The oil agent shedding rate is less than 30%

[0161] [Examples 1 to 12 and Comparative Examples 1 to 10]

[0162] (Adjustment of spinning dope)

[0163] Polytetramethylene ether glycol with a number average molecular weight of 2000 was reacted with 4,4'-diphenylmethane diisocyanate at a molar ratio of 1:2, and then chain extension was carried out using a dimethylformamide solution of 1,2-diaminopropane to obtain a dimethylformamide solution with a polymer concentration of 27%. The viscosity at 30 °C was 1500 mPas.

[0164] (Manufacture of elastic fiber)

[0165] The polyurethane spinning dope was sprayed into a N2 gas stream at 190 °C for dry spinning. For the moving yarn during spinning, a treatment agent (the blending amount in the table is in weight %) prepared from the components described in Tables 2 to 5 and accounting for 6% by weight relative to the fiber was imparted using an oiling roller, and then it was wound around a yarn bobbin at a speed of 500 m per minute to obtain a 22 dtex monofilament cheese (winding amount 400 g). The evaluation results of the treatment agent performance of the obtained cheese are shown in Tables 2 to 5.

[0166] In addition, the aniline point, naphthene component, paraffin component, and aromatic component weight ratios of the mineral oil used in Tables 2 to 5 are as shown in Table 1.

[0167] [Table 1]

[0168]

[0169] [Table 2]

[0170]

[0171] [Table 3]

[0172]

[0173] [Table 4]

[0174]

[0175] [Table 5]

[0176]

[0177] (Silicone component)

[0178] b-1: Dimethyl silicone with kinematic viscosity of 10 mm 2 / s at 25°C

[0179] b-2: Dimethyl silicone with kinematic viscosity of 6 mm 2 / s at 25°C

[0180] b-3: Silicone resin (MQ resin) (500 mm 2 / s (25°C))

[0181] b-4: Polyether-modified silicone

[0182] c-1: 2-Ethylhexyl stearate

[0183] c-2: Poly-α-olefin (organophosphate and organophosphate salt) with kinematic viscosity of 19 mm 2 / s at 40°C

[0184] d-1: Isocetyl phosphate

[0185] d-2: Magnesium polyoxyethylene 3 mol adduct lauryl ether phosphate

[0186] (Fatty acid and fatty acid metal salt)

[0187] e-1: Magnesium stearate: average particle size 0.5 μm, needle-shaped (1:5)

[0188] e-2: Palmitic acid

[0189] (Other components)

[0190] x-1: Isostearyl alcohol

[0191] x-2: Sodium dioctyl sulfosuccinate

[0192] As can be seen from Tables 2 to 5, in Examples 1 to 12, a mineral oil satisfying an aniline point of more than 110°C and 170°C or less is used, and the content of the silicone component (B) is 0% by weight to less than 50% by weight. Therefore, the problems of the present application can be solved.

[0193] On the other hand, in Comparative Examples 1 to 10, a mineral oil satisfying an aniline point of more than 110°C and 170°C or less is not used, or the content of the silicone component (B) is not 0% by weight to less than 50% by weight. Therefore, the degreasing property, which is a problem of the present application, is insufficient.

[0194] Symbol Explanation

[0195] 1 Package of elastic fiber

[0196] 2 Winding paper tube

[0197] 3 Roller

[0198] 4 Roller

[0199] 5 Moving yarn

[0200] 6 Unwinding point

[0201] 7 Contact point between package and roller

[0202] 8 Package of elastic fiber

[0203] 9 Yarn

[0204] 10 Tension adjusting roller

[0205] 11 Roller

[0206] 12 Knitting needle

[0207] 13 U gauge

[0208] 14 Roller

[0209] 15 Speedometer

[0210] 16 Winding roller

[0211] 17 Kasuga type potentiometric device

Claims

1. A treating agent for elastic fibers, characterized in that, The treating agent for elastic fibers contains a mineral oil (A). The aniline point of the mineral oil (A) is greater than 110°C and 170°C or less. The content of the silicone component (B) is 0 wt% to less than 50 wt%.

2. The treating agent for elastic fibers according to claim 1, wherein, The content of the naphthene component in the mineral oil (A) is 0 wt% to 60 wt%.

3. The treating agent for elastic fibers according to claim 1 or 2, wherein, With respect to 100 parts by weight of the naphthene component contained in the mineral oil (A), the ratio of the paraffin component is 50 parts by weight to 10,000 parts by weight.

4. The treating agent for elastic fibers according to any one of claims 1 to 3, wherein, The treating agent for elastic fibers further contains at least one selected from organophosphates, organophosphate salts, fatty acids, and fatty acid metal salts.

5. The treating agent for elastic fibers according to any one of claims 1 to 4, wherein, The content of magnesium element detected from the treating agent by ICP emission spectrometry is 50 ppm to 1000 ppm.

6. The treating agent for elastic fibers according to any one of claims 1 to 5, wherein, The acid value of the treating agent for elastic fibers is 0.01 mgKOH / g to 20 mgKOH / g.

7. An elastic fiber, characterized in that, It is obtained by applying the treating agent for elastic fibers according to any one of claims 1 to 6 to the main body of the elastic fibers.

8. A method for manufacturing an elastic fiber, characterized in that, It includes a step of applying the treating agent for elastic fibers according to any one of claims 1 to 6 to the main body of the elastic fibers.

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