Treatment agent for elastic fibers and elastic fibers

Abstract

An object of the present invention is to provide a treating agent for elastic fibers capable of improving the smoothness and adhesiveness of elastic fibers, and elastic fibers to which the treating agent for elastic fibers is attached. The treating agent for elastic fibers of the present invention is characterized in that it contains a smoothing agent (A) containing silicone (A1) and the following mineral oil (A2), an organophosphate metal salt (B), and the following alcohol (C). The mass ratio of silicone (A1) to mineral oil (A2) is silicone (A1) / mineral oil (A2) = 15 / 85 to 80 / 20, and silicone (A1) contains polyether-modified silicone. The mineral oil (A2) contains an aromatic component in a proportion of 1% by mass or more. The alcohol (C) is at least one selected from branched-chain monohydric aliphatic alcohols having 8 or more and 26 or less carbon atoms and straight-chain secondary alcohols.

Description

Technical Field

[0001] The present invention relates to a treating agent for elastic fibers capable of improving the smoothness of elastic fibers and the adhesiveness between elastic fibers and other materials, and elastic fibers coated with the treating agent for elastic fibers. Background Art

[0002] For elastic fibers such as polyurethane-based elastic fibers, the adhesiveness between fibers is strong compared to other synthetic fibers. Therefore, for example, when elastic fibers are spun and wound into a package, and then pulled out from the package and supplied to a processing step, there is a problem that it is difficult to unwind stably from the package. Therefore, in order to improve the smoothness of elastic fibers more than before, a treating agent for elastic fibers containing a smoothing agent such as silicone is sometimes used.

[0003] There has been conventionally known a treating agent for elastic fibers disclosed in Patent Document 1. Patent Document 1 discloses a treating agent for elastic fibers containing at least one base component selected from silicone oil, mineral oil, and ester oil; and a hydroxy acid having at least two carboxyl groups in the molecule.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: International Publication No. 2014 / 148368 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] However, the conventional treating agent for elastic fibers cannot sufficiently achieve both effects such as improvement in the smoothness of elastic fibers coated with the treating agent for elastic fibers and improvement in the adhesiveness between elastic fibers and other materials.

[0009] Means for Solving the Problems

[0010] The inventors of the present invention conducted research to solve the above problems, and as a result, found that a composition in which silicone and a specified mineral oil are mixed at a specified ratio and an organic phosphate metal salt is mixed is suitable.

[0011] In order to solve the above problems, a treating agent for elastic fibers according to one aspect of the present invention is characterized in that it contains a smoothing agent (A) containing silicone (A1) and the following mineral oil (A2), an organic phosphate metal salt (B), and the following alcohol (C), the mass ratio of the silicone (A1) to the mineral oil (A2) is silicone (A1) / mineral oil (A2) = 15 / 85 to 80 / 20, and the silicone (A1) contains a polyether-modified silicone.

[0012] Mineral oil (A2): A mineral oil containing an aroma composition in a proportion of 1% by mass or more.

[0013] Alcohol (C): At least one selected from branched-chain monohydric aliphatic alcohols having 8 or more and 26 or less carbon atoms and straight-chain secondary alcohols.

[0014] The above-mentioned treating agent for elastic fibers may contain the above-mentioned metal salt of organophosphate (B) in a proportion of 0.05% by mass or more and 10% by mass or less.

[0015] The above-mentioned treating agent for elastic fibers may contain the above-mentioned mineral oil (A2) in a proportion of 45% by mass or more.

[0016] In the above-mentioned treating agent for elastic fibers, the above-mentioned metal salt of organophosphate (B) may be an alkaline earth metal salt of organophosphate.

[0017] The above-mentioned treating agent for elastic fibers may contain the above-mentioned polyether-modified silicone in a proportion of 0.05% by mass or more and 5% by mass or less.

[0018] The above-mentioned treating agent for elastic fibers may contain the above-mentioned alcohol (C) in a proportion of 0.05% by mass or more and 10% by mass or less.

[0019] To solve the above problems, a feature of the elastic fiber according to one aspect of the present invention is that the above-mentioned treating agent for elastic fibers is attached thereto.

[0020] Advantages of the Invention

[0021] According to the present invention, the smoothness of elastic fibers and the adhesiveness to other materials can be improved. Detailed Embodiments

[0022] (First Embodiment)

[0023] The following describes the first embodiment in which the treating agent for elastic fibers of the present invention (hereinafter also referred to as the treating agent) is embodied. The treating agent of this embodiment contains a smoothing agent (A) and a metal salt of organophosphate (B). In addition, the treating agent may further contain an alcohol (C).

[0024] The smoothing agent (A) used in the treating agent of this embodiment is mixed in the treating agent as a base component to impart smoothness to the elastic fibers. The smoothing agent (A) contains at least silicone (A1) and the following mineral oil (A2).

[0025] As the silicone (A1), silicone oil can be cited. Specific examples of the silicone oil include, for example, dimethyl silicone, phenyl-modified silicone, amino-modified silicone, amide-modified silicone, polyether-modified silicone, amino polyether-modified silicone, alkyl-modified silicone, alkyl aralkyl-modified silicone, alkyl polyether-modified silicone, ester-modified silicone, epoxy-modified silicone, methanol-modified silicone, mercapto-modified silicone, polyoxyalkylene-modified silicone, etc. These silicone oils can be suitably commercially available products defined by kinematic viscosity, etc. The kinematic viscosity can be suitably set, but the kinematic viscosity at 25 °C is preferably 2 cst (mm 2 / s) or more and 10000 cst (mm 2 / s) or less, more preferably 3 cst (mm 2 / s) or more and 7000 cst (mm 2 / s) or less. It should be noted that ranges arbitrarily combined from the above upper and lower limits can also be set. The kinematic viscosity at 25 °C is measured according to JIS Z 8803. Regarding the silicone (A1), one kind of silicone can be used alone, or two or more kinds of silicones can be used in combination.

[0026] The lower limit of the content ratio of the silicone (A1) in the treatment agent is preferably 10% by mass or more, more preferably 15% by mass or more. When the content ratio is 10% by mass or more, the smoothness of the elastic fiber to which the treatment agent is applied can be improved. The upper limit of the content ratio of the silicone (A1) in the treatment agent is preferably 90% by mass or less, more preferably 85% by mass or less. When the content ratio is 90% by mass or less, the effect of the present invention can be further improved. It should be noted that ranges arbitrarily combined from the above upper and lower limits can also be set.

[0027] The silicone (A1) preferably contains polyether-modified silicone. By making the silicone (A1) contain polyether-modified silicone, the smoothness can be further improved.

[0028] As the polyether-modified silicone, a known substance can be suitably used. As the polyether-modified silicone, for example, a polyether-modified silicone having an alkylene oxide chain can be cited. Specific examples of the alkylene oxide as the raw material of the alkylene oxide chain include, for example, ethylene oxide, propylene oxide, etc. Regarding the alkylene oxide, one kind of alkylene oxide can be used alone, or two or more kinds of alkylene oxides can be suitably used in combination. In the case of applying two or more kinds of alkylene oxides, their addition modes can be any of block addition, random addition, and a combination of block addition and random addition, and there is no particular limitation.

[0029] As the polyether-modified silicone, for example, ABn type polyether-modified silicone, side-chain type polyether-modified silicone, both-end type polyether-modified silicone, alkyl polyether-modified silicone in which both a polyether group and an alkyl group are introduced into the side chain or the end, a substance in which the end portion of the polyether chain of the side-chain type polyether-modified silicone is capped with an aliphatic compound or a fatty acid compound, a substance in which the end portion of the polyether chain of the both-end type polyether-modified silicone is capped with an aliphatic compound or a fatty acid compound, etc. can be cited. As these polyether-modified silicones, commercially available products defined by kinematic viscosity etc. can be suitably used. The kinematic viscosity can be suitably set, but the kinematic viscosity at 25 °C is preferably 100 cst (mm 2 / s) or more and 10,000 cst (mm 2 / s) or less, more preferably 500 cst (mm 2 / s) or more and 7,000 cst (mm 2 / s) or less. A range formed by arbitrarily combining the above upper limit and lower limit can also be set. It should be noted that the kinematic viscosity when using a plurality of polyether-modified silicones is the actually measured value of the mixture of the plurality of polyether-modified silicones used. Regarding the polyether-modified silicone, one kind of polyether-modified silicone can be used alone, or two or more kinds of polyether-modified silicones can be used in combination.

[0030] The lower limit of the content ratio of the polyether-modified silicone in the treatment agent is preferably 0.05% by mass or more, more preferably 0.1% by mass or more. When the content ratio is 0.05% by mass or more, the smoothness of the elastic fiber to which the treatment agent is imparted can be improved. The upper limit of the content ratio of the polyether-modified silicone is preferably 5% by mass or less, more preferably 4% by mass or less. When the content ratio is 5% by mass or less, the effect of the present invention can be further improved. It should be noted that a range formed by arbitrarily combining the above upper limit and lower limit can also be set.

[0031] As the mineral oil (A2) in the treatment agent to which this embodiment is applied, common petroleum fractions composed of an alkane component, a naphthene component, and an aromatic component can be cited. The qualitative and content of each of the aromatic component, naphthene component, and alkane component in the mineral oil are determined by ring analysis based on the n-d-M method specified in ASTM D3238, and the contents of the aromatic component, naphthene component, and alkane component have the same meaning as the %C A ,%C N ,%C P values therein.

[0032] The content ratio of the aromatic component in the mineral oil (A2) is 1% by mass or more, preferably 1.5% by mass or more. By limiting the content ratio to 1% by mass or more, the adhesiveness between the elastic fiber to which the treatment agent is imparted and other materials can be improved.

[0033] Mineral oil (A2) can suitably be a commercially available product defined by kinematic viscosity etc. The kinematic viscosity can be suitably set, but the kinematic viscosity at 25 °C is preferably 2 cst (mm 2 / s) or more and 100 cst (mm 2 / s) or less. It should be noted that the viscosity at 25 °C is measured using a Cannon-Fenske viscometer. In addition, in the case of applying multiple mineral oils, the value of the kinematic viscosity when all the mineral oils are mixed is adopted.

[0034] The lower limit of the content ratio of mineral oil (A2) in the treatment agent is preferably 20% by mass or more, more preferably 45% by mass or more. When the content ratio is 20% by mass or more, the smoothness of the elastic fiber to which the treatment agent is applied can be improved. When the content ratio is 45% by mass or more, the adhesiveness between the elastic fiber to which the treatment agent is applied and other materials can be improved. The upper limit of the content ratio of mineral oil (A2) in the treatment agent is preferably 85% by mass or less, more preferably 80% by mass or less. When the content ratio is 85% by mass or less, the effects of the present invention can be further improved. It should be noted that a range arbitrarily combined with the above upper and lower limits can also be set.

[0035] The mass ratio of silicone (A1) and mineral oil (A2) in the treatment agent is silicone (A1) / mineral oil (A2) = 15 / 85 to 80 / 20, preferably 18 / 82 to 78 / 22. It should be noted that a range arbitrarily combined with the above upper and lower limits can also be set. By limiting the mass ratio of silicone (A1) and mineral oil (A2) within this range, the smoothness of the elastic fiber to which the treatment agent is applied and the adhesiveness with other materials can be improved.

[0036] In the treatment agent of the present embodiment, additional smoothing agents other than the above can be used in combination. As the additional smoothing agent, a known substance can be suitably adopted. As the additional smoothing agent, for example, ester oil, polyolefin, etc. can be cited.

[0037] There is no particular limitation on the ester oil, and ester oils produced from fatty acids and alcohols can be cited. The ester oil can be produced, for example, from fatty acids and alcohols having an odd or even number of hydrocarbon groups described later.

[0038] In the fatty acid as a raw material of the ester oil, there is no particular limitation on the number of carbon atoms, the presence or absence of a branched chain, the number of elements, etc., and for example, it can be a higher fatty acid, a fatty acid having a cyclo ring, or a fatty acid having an aromatic ring. In the alcohol as a raw material of the ester oil, there is no particular limitation on the number of carbon atoms, the presence or absence of a branched chain, the number of elements, etc., and for example, it can be a higher alcohol, an alcohol having a cyclo ring, or an alcohol having an aromatic ring.

[0039] As specific examples of ester oils, for example, the following can be cited: (1) ester compounds of aliphatic monohydric alcohols and aliphatic monocarboxylic acids such as octyl palmitate, oleyl laurate, oleyl oleate, isotridecyl stearate, isocetyl oleate; (2) ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids such as 1,6 - hexanediol dicaprate, glyceryl trioleate, trimethylolpropane trilaurate, pentaerythritol tetraoctanoate; (3) ester compounds of aliphatic monohydric alcohols and aliphatic polycarboxylic acids such as dioleyl azelate, dilauryl thiodipropionate, bis(isocetyl) thiodipropionate, diisostearyl thiodipropionate; (4) ester compounds of aromatic monohydric alcohols and aliphatic monocarboxylic acids such as benzyl oleate, benzyl laurate; (5) complete ester compounds of aromatic polyhydric alcohols and aliphatic monocarboxylic acids such as bisphenol A dilaurate; (6) complete ester compounds of aliphatic monohydric alcohols and aromatic polycarboxylic acids such as bis(2 - ethylhexyl) phthalate, diisostearyl isophthalate, trioctyl trimellitate; (7) natural oils such as coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil, sesame oil, fish oil, and beef tallow, etc.

[0040] For polyolefin applications, poly - α - olefins are used as smoothing components. As specific examples of polyolefins, for example, poly - α - olefins obtained by polymerizing 1 - butene, 1 - hexene, 1 - decene, etc. can be cited. Poly - α - olefins can be suitably commercially available products.

[0041] Regarding the additional smoothing agents, one type of smoothing agent can be used alone, or two or more types of smoothing agents can be used in combination.

[0042] It should be noted that from the aspect of effectively exerting the efficacy of the present invention, the total content ratio of silicone (A1) and mineral oil (A2) in all the smoothing agents is preferably 80% by mass or more, more preferably 90% by mass or more.

[0043] The treatment agent of the present embodiment can improve the smoothness and unwindability of elastic fibers to which the treatment agent is applied by containing an organophosphate metal salt (B).

[0044] As the organophosphate metal salt (B) in the treatment agent of the present embodiment, for example, metal salts of alkyl phosphates, metal salts of alkenyl phosphates, metal salts of alkyl phosphates or alkenyl phosphates added with (poly)alkylene oxide chains, etc. can be cited.

[0045] The alkyl or alkenyl group constituting the organophosphate metal salt is not particularly limited and may be, for example, linear or may have a branched structure. The number of carbon atoms of the alkyl or alkenyl group is not particularly limited, preferably 1 or more and 32 or less carbon atoms, more preferably 8 or more and 22 or less carbon atoms. Specific examples of the alkyl group include, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, eicosyl, isobutyl, isopentyl, isohexyl, isoheptyl, isooctyl, isodecyl, isoundecyl, isododecyl, isotridecyl, isotetradecyl, isopentadecyl, isohexadecyl, isoheptadecyl, isooctadecyl, isoeicosyl, etc.

[0046] Specific examples of the alkenyl group include, for example, butenyl, pentenyl, hexenyl, heptenyl, octenyl, nonenyl, decenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecenyl, hexadecenyl, heptadecenyl, octadecenyl, eicosenyl, isobutenyl, isopentenyl, isohexenyl, isoheptenyl, isooctenyl, isononenyl, isodecenyl, isoundecenyl, isododecenyl, isotridecenyl, isotetradecenyl, isopentadecenyl, isohexadecenyl, isoheptadecenyl, isooctadecenyl, isoeicosenyl, etc.

[0047] Regarding the alkylene oxide used as a raw material for forming the (poly)alkylene oxide structure, an alkylene oxide having 2 or more and 4 or less carbon atoms is preferred. Specific examples of the alkylene oxide include, for example, ethylene oxide, propylene oxide, butylene oxide, etc. The addition molar number of the alkylene oxide can be appropriately set, but is preferably 0.1 mole or more and 60 moles or less, more preferably 1 mole or more and 40 moles or less, and further preferably 2 moles or more and 30 moles or less. A range formed by arbitrarily combining the above upper and lower limits can also be set. It should be noted that the addition molar number of the alkylene oxide represents the molar number of the alkylene oxide relative to 1 mole of the aliphatic alcohol compound in the input raw material. Regarding the alkylene oxide, one kind of alkylene oxide can be used alone, or two or more kinds of alkylene oxides can be appropriately combined. In the case of applying two or more kinds of alkylene oxides, their addition modes can be any of block addition, random addition, and a combination of block addition and random addition, without particular limitation.

[0048] The phosphoric acid constituting the organophosphate metal salt (B) is not particularly limited and may be orthophosphoric acid or a polyphosphoric acid such as diphosphoric acid.

[0049] As the metal salts constituting the organophosphate metal salt (B), for example, alkali metal salts and alkaline earth metal salts can be cited. Specific examples of the alkali metals constituting the alkali metal salts include, for example, sodium, potassium, lithium, etc. As the alkaline earth metals constituting the alkaline earth metal salts, metals corresponding to Group 2 elements can be cited, such as calcium, magnesium, beryllium, strontium, barium, etc. Among these, from the aspect of excellent unwindability of the fibers to which the treatment agent is applied, alkaline earth metal salts of organophosphates are preferred.

[0050] Specific examples of the organophosphate metal salt (B) include, for example, magnesium salt of phosphate ester of isotridecyl ether, magnesium salt of phosphate ester of polyoxyethylene (n = 5, indicating the number of moles of alkylene oxide added hereinafter the same) isooctadecyl ether, calcium salt of phosphate ester of isooctadecyl ether, magnesium salt of phosphate ester of tridecyl ether, sodium salt of phosphate ester of isooctadecyl ether, sodium salt of phosphate ester of polyoxyethylene (n = 5) isotridecyl ether, etc.

[0051] Regarding the organophosphate metal salt (B), one kind of organophosphate metal salt can be used alone, or two or more kinds of organophosphate metal salts can be appropriately combined and used.

[0052] The lower limit of the content ratio of the organophosphate metal salt (B) in the treatment agent is preferably 0.05% by mass or more, more preferably 0.1% by mass or more. When the content ratio is 0.05% by mass or more, the smoothness and unwindability of the elastic fibers to which the treatment agent is applied can be improved. The upper limit of the content ratio of the organophosphate metal salt (B) is preferably 10% by mass or less, more preferably 8% by mass or less. When the content ratio is 10% by mass or less, the effects of the present invention can be further improved. It should be noted that ranges arbitrarily combined of the above upper and lower limits can also be set.

[0053] As the alcohol (C) in the treatment agent to which this embodiment is applied, branched monohydric aliphatic alcohols and straight-chain secondary alcohols can be cited. The use of the alcohol (C) can improve the adhesiveness between the elastic fibers to which the treatment agent is applied and other materials.

[0054] The number of carbon atoms of the branched monohydric aliphatic alcohol is 8 or more and 26 or less, preferably 10 or more and 24 or less. In addition, the aliphatic alcohol can be a saturated aliphatic alcohol or an unsaturated aliphatic alcohol. In addition, regarding the hydrocarbon group constituting the branch, there is no particular limitation on its branching position. For example, it can be a carbon chain branched at the α position or a carbon chain branched at the β position. In addition, it can be a primary alcohol or a secondary alcohol.

[0055] As specific examples of monohydric aliphatic alcohols having a branched chain, for example, isooctanol, isononanol, isodecanol, isododecanol, isotridecanol, isotetradecanol, isohexadecanol, isoheptadecanol, isooctadecanol, isononadecanol, icosanol, henicosanol, docosanol, tricosanol, tetracosanol, pentacosanol, hexacosanol, etc. can be cited.

[0056] As specific examples of monohydric aliphatic alcohols having a branched chain at the β-position of the alkyl chain constituting the aliphatic alcohol, that is, Guerbet alcohols, for example, 2-ethyl-1-propanol, 2-ethyl-1-butanol, 2-ethyl-1-hexanol, 2-ethyl-1-octanol, 2-ethyl-decanol, 2-butyl-1-hexanol, 2-butyl-1-octanol, 2-butyl-1-decanol, 2-hexyl-1-octanol, 2-hexyl-1-decanol, 2-octyl-1-decanol, 2-octyl-1-dodecanol, 2-hexyl-1-dodecanol, 2-(1,3,3-trimethylbutyl)-5,7,7-trimethyl-1-octanol, 2-(4-methylhexyl)-8-methyl-1-decanol, 2-(1,5-dimethylhexyl)-5,9-dimethyl-1-decanol, 2-decyl-1-tetradecanol, etc. can be cited.

[0057] The straight-chain secondary alcohol can be a monohydric aliphatic alcohol having a straight-chain hydrocarbon group. The number of carbon atoms of the straight-chain secondary alcohol is preferably 6 or more and 24 or less, more preferably 8 or more and 22 or less. The secondary alcohol can be a saturated aliphatic alcohol or an unsaturated aliphatic alcohol. The bonding position of the hydroxyl group in the hydrocarbon group is not particularly limited, and for example, the β-position etc. can be cited.

[0058] As specific examples of the straight-chain secondary alcohol, for example, 2-hexanol, 2-octanol, 2-nonanol, 2-decanol, 2-undecanol, 2-dodecanol, 2-tridecanol, 2-tetradecanol, 2-pentadecanol, 2-hexadecanol, 2-heptadecanol, 2-octadecanol, 2-nonadecanol, 2-icosanol, 2-henicosanol, 2-docosanol, 2-tricosanol, 2-tetracosanol, etc. can be cited.

[0059] Regarding the alcohol (C), one kind of alcohol can be used alone, or two or more kinds of alcohols can be used in combination.

[0060] The lower limit of the content ratio of the alcohol (C) in the treatment agent is preferably 0.05% by mass or more, more preferably 0.1% by mass or more. When the content ratio is 0.05% by mass or more, the adhesiveness between the elastic fiber to which the treatment agent is applied and other materials can be improved. The upper limit of the content ratio of the alcohol (C) is preferably 10% by mass or less, more preferably 8% by mass or less. When the content ratio is 10% by mass or less, the effects of the present invention can be further improved. It should be noted that a range arbitrarily combined of the above upper limit and lower limit can also be set.

[0061] (Second Embodiment)

[0062] Next, a second embodiment in which the elastic fiber of the present invention is embodied will be described. The treatment agent of the first embodiment is attached to the elastic fiber of this embodiment. There is no particular limitation on the amount of the treatment agent of the first embodiment attached to the elastic fiber. From the aspect of further improving the effects of the present invention, based on the amount of the treatment agent not containing a solvent, it is preferably attached in a proportion of 0.1% by mass or more and 10% by mass or less.

[0063] There is no particular limitation on the elastic fiber. For example, polyester-based elastic fibers, polyamide-based elastic fibers, polyolefin-based elastic fibers, polyurethane-based elastic fibers, etc. can be cited. Among these, polyurethane-based elastic fibers are preferred. In this case, the performance of the effects of the present invention can be further improved.

[0064] The manufacturing method of the elastic fiber of this embodiment includes oiling the elastic fiber with the treatment agent of the first embodiment. As the method of oiling the treatment agent, a method of attaching it to the elastic fiber in the spinning process of the elastic fiber by a neat oiling method without dilution is preferred. As the attaching method, known methods such as a roll oiling method, a yarn guide oiling method, and a spray oiling method can be applied. For the oiling roll, it is usually common to be located between the nozzle and the traverse winding device, and it can also be applied to the manufacturing method of this embodiment. Among these, when the treatment agent of the first embodiment is attached to the elastic fiber, such as a polyurethane-based elastic fiber, by using an oiling roll located between the stretching rolls, the performance of the effects is remarkable, and thus it is preferred.

[0065] The manufacturing method applicable to the elastic fiber itself in this embodiment is not particularly limited, and it can be manufactured by a known method. For example, a wet spinning method, a melt spinning method, a dry spinning method, etc. can be cited. Among these, from the aspect of excellent quality and manufacturing efficiency of the elastic fiber, a dry spinning method is preferably applied.

[0066] The effects of the treatment agent and the elastic fiber of this embodiment will be described.

[0067] (1) The treatment agent of this embodiment contains a smoothing agent (A) containing silicone (A1) and the above-mentioned mineral oil (A2) in a specified proportion, and the above-mentioned metal salt of organic phosphate (B). Therefore, it is possible to fully achieve the balance of various functions such as improving the smoothness of the elastic fiber to which the treatment agent is imparted and improving the adhesiveness between the elastic fiber and other materials. In addition, the elastic fiber to which the treatment agent is imparted can improve the unwindability.

[0068] (2) When the treating agent of the present embodiment further contains a specified amount of polyether-modified silicone, the smoothness of the elastic fiber to which the treating agent is applied can be improved.

[0069] (3) When the treating agent of the present embodiment further contains the above-mentioned alcohol (C), the adhesiveness between the elastic fiber and other materials can be further improved.

[0070] It should be noted that the above-mentioned embodiments can be modified as follows. The above-mentioned embodiments and the following modification examples can be implemented by combining them with each other within a technically non-contradictory range.

[0071] · In the treating agent of the above-mentioned embodiment, within the range that does not hinder the effects of the present invention, stabilizers, charge control agents, tackifiers, antioxidants, ultraviolet absorbers, etc., which are used as other components to maintain the quality of the treating agent and are commonly used in treating agents, can be further blended. It should be noted that from the aspect of effectively exerting the efficacy of the present invention, the content ratio of other components in the treating agent is preferably 10% by mass or less, and more preferably 5% by mass or less.

[0072] Examples

[0073] Hereinafter, examples and the like are given to more specifically illustrate the constitution and effects of the present invention, but the present invention is not limited to these examples. It should be noted that in the following examples and comparative examples, "parts" refers to parts by mass, and "%" refers to mass %.

[0074] Test Group 1 (Preparation of Treating Agent)

[0075] Regarding the treating agents used in each example and each comparative example, the respective components shown in Table 1 were used and prepared by the following preparation method.

[0076] (Example 1)

[0077] 46 parts (%) of dimethyl silicone (AS-1) with a kinematic viscosity of 10 cSt (mm 2 / s) at 25 °C, which is used as a smoothing agent (A); 3 parts (%) of polyether-modified silicone (AS-3) with a kinematic viscosity of 1000 mm 2 / s, a silicone main chain / polyether side chain ratio of 80 / 20 (mass ratio), and an ethylene oxide / propylene oxide ratio of 50 / 50 (molar ratio); 47 parts (%) of mineral oil (AM-1) with an aromatic component of 2.5% and a kinematic viscosity of 11 cSt (mm 2 / s) at 25 °C; 3 parts (%) of magnesium salt of isotridecyl ether phosphate (B-1), which is used as an organic phosphate metal salt (B); 1 part (%) of 2-hexyl-1-decanol (C-1), which is used as an alcohol (C), were thoroughly mixed and made uniform to prepare the treating agent of Example 1.

[0078] (Examples 2 to 24, Comparative Examples 1 to 5)

[0079] In Examples 2 to 24 and Comparative Examples 1 to 5, a treating agent was prepared by mixing a smoothing agent (A), a metal salt of organophosphoric acid (B), and an alcohol (C) in the proportions shown in Table 1, in the same manner as in Example 1.

[0080] The types of the respective components of silicone (A1), mineral oil (A2), metal salt of organophosphoric acid (B), and alcohol (C) in the treating agents of each example, and the proportions of the respective components when the total content ratio of the components is 100% are shown in the columns of "Silicone (A1)", "Mineral oil (A2)", "Metal salt of organophosphoric acid (B)", and "Alcohol (C)" in Table 1. In addition, the mass ratio of silicone (A1) to mineral oil (A2) in the treating agents of each example is shown in the column of "Silicone (A1) / Mineral oil (A2) mass ratio" in Table 1.

[0081] [Table 1]

[0082]

[0083] The details of the silicone (A1), mineral oil (A2), metal salt of organophosphoric acid (B), and alcohol (C) described in Table 1 are as follows.

[0084] (Silicone (A1))

[0085] AS-1: Dimethyl silicone having a kinematic viscosity of 10 cSt (mm 2 / s) at 25°C

[0086] AS-2: Dimethyl silicone having a kinematic viscosity of 20 cSt (mm 2 / s) at 25°C

[0087] AS-3: Polyether-modified silicone having a kinematic viscosity of 1000 mm 2 / s, silicone main chain / polyether side chain = 80 / 20 (mass ratio), ethylene oxide / propylene oxide = 50 / 50 (molar ratio) at 25°C

[0088] AS-4: Polyether-modified silicone having a kinematic viscosity of 2200 mm 2 / s, silicone main chain / polyether side chain = 60 / 40 (mass ratio), ethylene oxide / propylene oxide = 40 / 60 (molar ratio) at 25°C

[0089] (Mineral oil (A2))

[0090] AM-1: Mineral oil having an aromatic component of 2.5% and a kinematic viscosity of 11 cSt (mm 2 / s) at 25°C

[0091] AM-2: Mineral oil with an aromatic component of 1.6% and a kinematic viscosity of 20 cSt (mm 2 / s) at 25 °C

[0092] AM-3: Mineral oil with an aromatic component of 7.0% and a kinematic viscosity of 11 cSt (mm 2 / s) at 25 °C ram-1: Mineral oil with an aromatic component of 0.2% and a kinematic viscosity of 18 cSt (mm 2 / s) at 25 °C (Organophosphate metal salt (B))

[0093] B-1: Magnesium salt of isotridecyl ether phosphate

[0094] B-2: Magnesium salt of polyoxyethylene (n = 5) isooctadecyl ether phosphate

[0095] B-3: Calcium salt of isooctadecyl ether phosphate

[0096] B-4: Magnesium salt of tridecyl ether phosphate

[0097] B-5: Sodium salt of isooctadecyl ether phosphate

[0098] B-6: Sodium salt of polyoxyethylene (n = 5) isotridecyl ether phosphate

[0099] rb-1: Triethylamine salt of isotridecyl ether phosphate

[0100] rb-2: Unneutralized isooctadecyl ether phosphate

[0101] (Alcohol (C))

[0102] C-1: 2-Hexyl-1-decanol

[0103] C-2: 2-(1,3,3-Trimethylbutyl)-5,7,7-trimethyl-1-octanol

[0104] C-3: 2-Decyl-1-tetradecanol

[0105] C-4: 2-Decanol

[0106] Test Group 2 (Manufacture of Elastic Fibers)

[0107] The prepolymer obtained from polytetramethylene glycol with a molecular weight of 1000 and diphenylmethane diisocyanate is chain-extended with ethylenediamine in a dimethylformamide solution to obtain a spinning dope with a concentration of 30%. The spinning dope is dry-spun by a spinneret in a heated gas stream. Then, the polyurethane-based elastic fiber after dry spinning is treated with a pure sizing agent by a roller sizing method using a sizing roller located between the stretching rollers before winding.

[0108] The elastic fiber attached with the sizing agent by roller sizing in the above manner is wound around a cylindrical paper tube with a length of 58 mm at a winding speed of 600 m / minute using a winding machine with a surface-driven winding method with a traverse yarn guide that gives a winding width of 38 mm, to obtain a package of 1 kg or 500 g of 40 denier dry-spun polyurethane-based elastic fiber. Regarding the adjustment of the amount of sizing agent attached, it is carried out by adjusting the rotation speed of the sizing roller so that they are all 5%.

[0109] Using the package obtained in this way, the smoothness, unwindability, and adhesiveness with non-woven fabric of the elastic fiber are evaluated as described below.

[0110] Test Group 3 (Evaluation of Elastic Fiber)

[0111] · Evaluation of Smoothness

[0112] A friction tester (manufactured by EIKO Measuring Instruments Co., Ltd., SAMPLE FRICTION UNIT MODEL TB-1) is used. A pear skin pattern chrome-plated pin with a diameter of 1 cm and a surface roughness of 2S is arranged between two free rollers. Relative to the pear skin pattern chrome-plated pin, the polyurethane-based elastic fiber pulled out from the above package (1 kg roll) is passed through in such a way that the contact angle is set to 90 degrees. Under the conditions of 25 °C and 60% RH, an initial tension (T1) of 5 g is applied on the inlet side, and the secondary tension (T2) on the outlet side when moving at a speed of 100 m / minute is measured. The friction coefficient is calculated by the following mathematical formula and evaluated according to the following criteria. The results are shown in the "Smoothness" column of Table 1.

[0113] [Equation 1]

[0114] Friction coefficient = (2 / 3.14) × ln(T2 / T1)

[0115] · Evaluation Criteria for Smoothness

[0116] ◎ (Good): The friction coefficient is 0.150 or more and less than 0.220

[0117] ○ (Qualified): The friction coefficient is 0.220 or more and less than 0.260

[0118] × (Defect): Coefficient of friction is 0.260 or more

[0119] · Evaluation of unwinding property

[0120] A delivery section is formed by the first drive roller and the first free roller continuously connected thereto. In addition, a winding section is formed by the second drive roller and the second free roller continuously connected thereto. The distance between the delivery section and the winding section is made approximately 20 cm in the horizontal direction. The made package (500 g package) is installed on the first drive roller. The first drive roller is driven to deliver the elastic fiber, and the second drive roller is driven to wind the elastic fiber. Unwind until the thickness of the yarn roll of the package reaches 2 mm

[0121] At this time, the delivery speed of the first drive roller is fixed at 50 m / min. On the other hand, the winding speed of the second drive roller is slowly increased from 50 m / min to forcibly unwind the elastic fiber from the package. During this forced unwinding, when the bouncing of the elastic fiber between the delivery section and the winding section disappears, in other words, when the behavior of the yarn does not become unstable and is smoothly delivered from the package, the winding speed V (m / min) is measured. The unwinding property (%) is calculated by the following formula and evaluated according to the following criteria. The results are shown in the "Unwinding property" column of Table 1

[0122] Unwinding property (%) = (V - 50) × 2

[0123] · Evaluation criteria for unwinding property

[0124] ◎ (Good): Unwinding property is less than 150%

[0125] ○ (Qualified): Unwinding property is 150% or more and less than 180%

[0126] × (Unqualified): Unwinding property is 180% or more

[0127] · Evaluation of adhesiveness

[0128] A rubber-based hot melt adhesive mainly composed of styrene-butadiene-styrene block copolymer heated and melted at 145°C is uniformly coated on a polypropylene spunbond nonwoven fabric with a roller. The nonwoven fabric after the adhesive is coated is cut to produce two cut pieces with a size of 40 mm × 20 mm. The front end 10 mm of a 40 mm long polyurethane-based elastic fiber pulled out from the above package (1 kg package) is sandwiched between the adhesive-coated surfaces of the two cut pieces, and at a treatment temperature of 160°C and a load of 9 g / cm 2Under the following conditions, press for 30 seconds to prepare a test specimen. Fix the spunbond nonwoven fabric part made of polypropylene of this test specimen to the upper specimen holding part of a tensile tester (manufactured by Shimadzu Corporation, Autograph AGS), fix the polyurethane-based elastic fiber to the lower specimen holding part, and perform tensile testing at a speed of 100 mm / minute. Measure the strength required to extract the polyurethane-based elastic fiber from the spunbond nonwoven fabric made of polypropylene, and evaluate according to the following criteria. The results are shown in the "Adhesiveness" column of Table 1.

[0129] · Evaluation criteria for adhesiveness

[0130] ◎◎ (Excellent): Strength is 36 g or more

[0131] ◎ (Good): Strength is 33 g or more and less than 36 g

[0132] ○ (Qualified): Strength is 30 g or more and less than 33 g

[0133] × (Unqualified): Strength is less than 30 g

[0134] From the evaluation results of each example in Table 1 relative to each comparative example, it can be seen that by using the treatment agent of the present invention, the smoothness, adhesiveness, and unwindability of the elastic fiber to which the treatment agent is applied can be improved.

[0135] The present disclosure also includes the following aspects.

[0136] (Supplementary Note 1)

[0137] A treatment agent for elastic fibers, characterized in that it contains a smoothing agent (A) comprising silicone (A1) and the following mineral oil (A2), and an organophosphate metal salt (B), and the mass ratio of the above silicone (A1) to the above mineral oil (A2) is silicone (A1) / mineral oil (A2) = 15 / 85 to 80 / 20.

[0138] Mineral oil (A2): A mineral oil containing an aromatic component in a proportion of 1% by mass or more.

[0139] (Supplementary Note 2)

[0140] The treatment agent for elastic fibers according to Supplementary Note 1, wherein the above organophosphate metal salt (B) is contained in the above treatment agent for elastic fibers in a proportion of 0.05% by mass or more and 10% by mass or less.

[0141] (Supplementary Note 3)

[0142] The treatment agent for elastic fibers according to Supplementary Note 1 or 2, wherein the above mineral oil (A2) is contained in the above treatment agent for elastic fibers in a proportion of 45% by mass or more.

[0143] (Supplementary Note 4)

[0144] The treating agent for elastic fibers according to any one of Supplementary Notes 1 to 3, wherein the organophosphoric acid ester metal salt (B) is an alkaline earth metal salt of an organophosphoric acid ester.

[0145] (Supplementary Note 5)

[0146] The treating agent for elastic fibers according to any one of Supplementary Notes 1 to 4, wherein the silicone (A1) contains a polyether-modified silicone, and the polyether-modified silicone is contained in the treating agent for elastic fibers in a proportion of 0.05% by mass or more and 5% by mass or less.

[0147] (Supplementary Note 6)

[0148] The treating agent for elastic fibers according to any one of Supplementary Notes 1 to 5, which further contains the following alcohol (C), and the alcohol (C) is contained in the treating agent for elastic fibers in a proportion of 0.05% by mass or more and 10% by mass or less.

[0149] Alcohol (C): at least one selected from branched-chain monohydric aliphatic alcohols having 8 or more and 26 or less carbon atoms and straight-chain secondary alcohols.

[0150] (Supplementary Note 7)

[0151] An elastic fiber, characterized in that the treating agent for elastic fibers according to any one of Supplementary Notes 1 to 6 is attached thereto.

Claims

1. A treating agent for elastic fibers, characterized in that, It contains a smoothing agent (A) comprising silicone (A1) and the following mineral oil (A2), an organophosphate metal salt (B), and the following alcohol (C). The mass ratio of the silicone (A1) to the mineral oil (A2) is silicone (A1) / mineral oil (A2) = 15 / 85 to 80 / 20. The silicone (A1) comprises a polyether-modified silicone. The polyether-modified silicone is contained in the treatment agent for elastic fibers at a ratio of 5% by mass or less. Mineral oil (A2): A mineral oil containing an aromatic component at a ratio of 1% by mass or more. Alcohol (C): At least one selected from branched-chain monohydric aliphatic alcohols having 8 or more and 26 or less carbon atoms and straight-chain secondary alcohols.

2. The treating agent for elastic fibers according to claim 1, wherein, The organophosphate metal salt (B) is contained in the treatment agent for elastic fibers at a ratio of 0.05% by mass or more and 10% by mass or less.

3. The treating agent for elastic fibers according to claim 1 or 2, wherein, The mineral oil (A2) is contained in the treatment agent for elastic fibers at a ratio of 45% by mass or more.

4. The treating agent for elastic fibers according to claim 1 or 2, wherein, The organophosphate metal salt (B) is an alkaline earth metal salt of an organophosphate.

5. The treating agent for elastic fibers according to claim 1 or 2, wherein, The polyether-modified silicone is contained in the treatment agent for elastic fibers at a ratio of 0.05% by mass or more and 5% by mass or less.

6. The treating agent for elastic fibers according to claim 1 or 2, wherein, The alcohol (C) is contained in the treatment agent for elastic fibers at a ratio of 0.05% by mass or more and 10% by mass or less.

7. An elastic fiber, characterized in that, It is attached with the treatment agent for elastic fibers according to any one of claims 1 to 6.

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