Elastic fiber treatment agent and elastic fiber

Abstract

To provide an elastic fiber treatment agent capable of reducing friction between fibers and metal and improving stability, and elastic fibers to which the elastic fiber treatment agent is adhered.SOLUTION: An elastic fiber treatment agent according to the present invention contains a smoothing agent (A) and a urea-modified silicone (B). Elastic fibers according to the present invention have adhered thereto an elastic fiber treatment agent containing a smoothing agent (A) and a urea-modified silicone (B).SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a treatment agent for elastic fibers that can reduce fiber-metal friction and improve stability of elastic fibers to which the treatment agent for elastic fibers is applied, and to elastic fibers to which such a treatment agent for elastic fibers is attached. [Background technology]

[0002] For example, elastic fibers such as polyurethane-based elastic fibers have stronger interfiber adhesion than other synthetic fibers. Therefore, for example, when the elastic fibers are spun and wound on a package, and then pulled out from the package for processing, there is a problem that it is difficult to stably unwind the elastic fibers from the package. Therefore, in order to improve the smoothness of the elastic fibers, a treatment agent for elastic fibers containing a smoothing agent such as silicone is sometimes used.

[0003] Conventionally, the treatment agents for elastic fibers disclosed in Patent Documents 1 and 2 are known. Patent Document 1 discloses a treatment agent for elastic fibers that contains at least one base component (A) selected from mineral oil, silicone oil, and ester oil, and at least one urea-based component (B) selected from urea compounds and urea-urethane compounds. Patent Document 2 discloses a lubricant applied to polyurethane elastic fibers that contains a silicon oxyalkylene copolymer having a predetermined viscosity, a mineral oil having a predetermined viscosity, nonylphenol, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6663721 [Patent Document 2] Special Publication No. 45-40719 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional treatment agents for elastic fibers have been unable to fully achieve both the effect of reducing fiber-metal friction of the elastic fibers to which the treatment agent for elastic fibers has been applied and the effect of improving the stability of the treatment agent for elastic fibers. [Means for solving the problem]

[0006] As a result of research aimed at solving the above problems, the present inventors have found that a composition in which a smoothing agent (A) and a urea-modified silicone (B) are blended is suitable for use in a treatment agent for elastic fibers.

[0007] Various aspects for solving the above problems will be described below. The elastic fiber treatment agent applied in the spinning process of the first embodiment contains a smoothing agent (A) and a urea-modified silicone (B). The urea-modified silicone (B) has a kinetic viscosity of 100 mm at 25°C. 2 / s or more 2000mm 2 / s or less It is characterized by the above.

[0008] condition Mr. 2 The aspect 1 2. The elastic fiber treatment agent according to claim 1, wherein the smoothing agent (A) is a mineral oil (A1) having a kinetic viscosity of 5 mm at 25° C. 2 / s or more 20mm 2 Contains dimethyl silicone (A2) of less than 1 / s.

[0009] Aspects 3 The aspect 2 In the agent for treating elastic fibers described in the above, the dimethyl silicone (A2) is contained in the agent for treating elastic fibers in a proportion of 10 mass % or more. Aspects 4 The first aspect is 3 In the treatment agent for elastic fibers according to any one of the above aspects, the treatment agent for elastic fibers contains the urea-modified silicone (B) in a proportion of 0.1 mass % or more and 5.0 mass % or less.

[0010] Aspects 5 The first aspect is 4The treatment agent for elastic fibers according to any one of the above aspects further contains at least one hydroxy compound (C) selected from aliphatic alcohols having 8 to 24 carbon atoms and alkylene oxide adducts of aliphatic alcohols having 8 to 24 carbon atoms.

[0011] Aspects 6 The aspect 5 In the treatment agent for elastic fibers described in the above, when the total content of the smoothing agent (A), the urea-modified silicone (B), and the hydroxy compound (C) is taken as 100 mass%, the smoothing agent (A) is contained in an amount of 90.0 mass% or more and 99.8 mass% or less, the urea-modified silicone (B) is contained in an amount of 0.1 mass% or more and 5.0 mass% or less, and the hydroxy compound (C) is contained in an amount of 0.1 mass% or more and 5.0 mass% or less.

[0012] Aspects 7 The elastic fiber of the embodiment 1 to 6 The elastic fiber treating agent according to any one of the above aspects is attached to the elastic fiber treating agent. Effect of the Invention

[0013] According to the present invention, it is possible to reduce fiber-metal friction of elastic fibers to which a treatment agent for elastic fibers has been applied, and to improve the stability of the treatment agent for elastic fibers. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] (First embodiment) A first embodiment of the treatment agent for elastic fibers (hereinafter, also referred to as the treatment agent) of the present invention will be described below. The treatment agent of this embodiment contains a smoothing agent (A) and a urea-modified silicone (B), and is applied in the spinning process. The treatment agent may further contain at least one hydroxy compound (C) selected from aliphatic alcohols having 8 to 24 carbon atoms and alkylene oxide adducts of aliphatic alcohols having 8 to 24 carbon atoms.

[0015] (Smoothing agent (A)) The lubricant (A) used in the treatment agent of this embodiment is blended in the treatment agent as a base component and provides lubricant to the elastic fiber to which the treatment agent is applied. The lubricant (A) preferably contains a mineral oil (A1) and silicone. Examples of lubricants other than the mineral oil (A1) and silicone include ester oil, polyolefin, etc.

[0016] Examples of the mineral oil (A1) include aromatic hydrocarbons, paraffinic hydrocarbons, and naphthenic hydrocarbons. More specifically, examples include spindle oil and liquid paraffin. The mineral oil (A1) may be a commercially available product specified by its kinetic viscosity. When multiple types of mineral oils are used, the kinetic viscosity value when all the mineral oils are mixed is used. By including a mineral oil (A1) as the smoothing agent (A), the smoothness of the elastic fiber to which the treatment agent is applied can be further improved.

[0017] The lower limit of the content of the mineral oil (A1) in the treatment agent is preferably 10% by mass or more, more preferably 15% by mass or more. The upper limit of the content of the mineral oil (A1) in the treatment agent is preferably 99.95% by mass or less, more preferably 99.9% by mass or less. By specifying the content within such a range, the smoothness of the elastic fiber to which the treatment agent is applied can be further improved. Note that any combination of the above upper and lower limits is also envisioned.

[0018] Examples of silicones include silicone oils other than the urea-modified silicone (B). Specific examples of silicone oils include dimethyl silicone, phenyl-modified silicone, amino-modified silicone, amide-modified silicone, polyether-modified silicone, aminopolyether-modified silicone, alkyl-modified silicone, alkylaralkyl-modified silicone, alkylpolyether-modified silicone, ester-modified silicone, epoxy-modified silicone, carbinol-modified silicone, mercapto-modified silicone, polyoxyalkylene-modified silicone, and carboxyl-modified silicone. These silicone oils may be appropriately selected from commercially available products that are specified by their kinetic viscosity. The kinetic viscosity is set appropriately, but for example, a silicone oil having a kinetic viscosity of 2 cst (mm 2 / s) or more 10000cst(mm) 2 / s) or less. Any combination of the above upper and lower limits is also envisaged. The kinetic viscosity at 25°C is measured in accordance with JIS Z 8803. Among these silicone oils, those with a kinetic viscosity of 5mm at 25°C are preferred. 2 / s or more 20mm 2 Dimethyl silicone (A2) having a molecular weight of 100 or less than 10000 / s is preferred. By using such a dimethyl silicone (A2), it is possible to reduce the fiber-metal friction of the elastic fiber to which the treatment agent is applied.

[0019] The treatment agent is a mineral oil (A1) and a kinetic viscosity of 5mm at 25°C as a lubricant from the viewpoint of improving the friction between the fibers and metals. 2 / s or more 20mm 2 It is preferable that the silicone oil contains dimethyl silicone (A2) of not more than 1 / s.

[0020] The lower limit of the content of the dimethyl silicone (A2) in the treatment agent is preferably 5% by mass or more, more preferably 10% by mass or more. The upper limit of the content of the dimethyl silicone (A2) is preferably 85% by mass or less, more preferably 80% by mass or less. By specifying the content of the dimethyl silicone (A2) within this range, the stability of the treatment agent can be further improved. In addition, the fiber-metal friction can be improved. Note that any combination of the above upper and lower limits is also envisioned.

[0021] The ester oil is not particularly limited, and may be an ester oil produced from a fatty acid and an alcohol, such as an ester oil produced from a fatty acid having an odd or even number of hydrocarbon groups and an alcohol, as described below.

[0022] The fatty acid as the raw material of the ester oil is not particularly limited in terms of the number of carbon atoms, the presence or absence of branching, the valence, etc., and may be, for example, a higher fatty acid, a fatty acid having a cyclo ring, or a fatty acid having an aromatic ring. The alcohol as the raw material of the ester oil is not particularly limited in terms of the number of carbon atoms, the presence or absence of branching, the valence, etc., and may be, for example, a higher alcohol, an alcohol having a cyclo ring, or an alcohol having an aromatic ring.

[0023] Specific examples of ester oils include (1) ester compounds of aliphatic monoalcohols and aliphatic monocarboxylic acids, such as octyl palmitate, oleyl laurate, oleyl oleate, isotridecyl stearate, isotetracosyl oleate, propyl isostearate, and 2-ethylhexyl stearate; (2) ester compounds of aliphatic polyhydric alcohols and aliphatic monocarboxylic acids, such as 1,6-hexanediol didecanate, glycerin trioleate, trimethylolpropane trilaurate, and pentaerythritol tetraoctanate; (3) dioleyl azelate, dioleyl thiodipropionate, diisocetyl thiodipropionate, and thioglyceryl ester; (4) ester compounds of an aromatic monoalcohol and an aliphatic monocarboxylic acid, such as benzyl oleate and benzyl laurate; (5) complete ester compounds of an aromatic polyhydric alcohol and an aliphatic monocarboxylic acid, such as bisphenol A dilaurate; (6) complete ester compounds of an aliphatic monoalcohol and an aromatic polycarboxylic acid, such as bis 2-ethylhexyl phthalate, diisostearyl isophthalate and trioctyl trimellitate; and (7) natural oils and fats, such as coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil, sesame oil, fish oil, and beef tallow.

[0024] The polyolefin is a poly-α-olefin used as a smoothing component. Specific examples of the polyolefin include poly-α-olefins obtained by polymerizing 1-butene, 1-hexene, 1-decene, etc. Commercially available poly-α-olefins may be used as appropriate.

[0025] These smoothing agents (A) may be used alone or in combination of two or more. The lower limit of the content of the smoothing agent (A) in the treatment agent is preferably 50% by mass or more, more preferably 60% by mass or more. The upper limit of the content of the smoothing agent (A) is preferably 99.95% by mass or less, more preferably 99.9% by mass or less. By specifying the content of the smoothing agent (A) within this range, the smoothness of the elastic fiber to which the treatment agent is applied can be further improved. Note that any combination of the above upper and lower limits is also envisioned.

[0026] (Urea-modified silicone (B)) The urea-modified silicone (B) used in the treatment agent of this embodiment can reduce fiber-metal friction of the elastic fiber to which the treatment agent is applied. In particular, when a mineral oil (A1) is used as the smoothing agent (A), the urea-modified silicone (B) has excellent compatibility with the mineral oil (A1), and therefore can improve the stability of the treatment agent. The urea-modified silicone (B) refers to a compound of modified silicone having, for example, -HN-CO-NH2, -HN-CO-NHR (R: hydrocarbon group) as a substituent. The main chain organopolysiloxane constituting the urea-modified silicone (B) may be linear or branched, and the position of the substituent may be the end of the main chain or the side chain.

[0027] Examples of the hydrocarbon group constituting the substituent include an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 10 carbon atoms, and an aralkyl group having 7 to 10 carbon atoms. Specific examples of the alkyl group having 1 to 12 carbon atoms include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a cyclohexyl group, an octyl group, a decyl group, and a dodecyl group. Specific examples of the aryl group having 6 to 10 carbon atoms include a phenyl group and a tolyl group. Specific examples of the aralkyl group having 7 to 10 carbon atoms include a benzyl group and a phenethyl group.

[0028] These urea-modified silicones (B) may be used alone or in combination of two or more. The kinetic viscosity of the urea-modified silicone (B) is: for example Kinematic viscosity at 25°C is 50cst (mm 2 / s) or more 10000cst(mm) 2 / s) or less However, in the present invention, 100cst(mm 2 / s) or more 2000cst(mm) 2 / s) below Applies to Any combination of the above upper and lower limits is also contemplated. The kinetic viscosity at 25°C is measured in accordance with JIS Z 8803. By specifying the kinetic viscosity of the urea-modified silicone (B) within this range, the stability of the treatment agent, particularly its stability over time, can be further improved.

[0029] The lower limit of the content of the urea-modified silicone (B) in the treatment agent is preferably 0.05% by mass or more, more preferably 0.1% by mass or more. When the content is 0.05% by mass or more, the fiber-metal friction of the elastic fiber to which the treatment agent is applied can be further reduced. The upper limit of the content of the urea-modified silicone (B) is preferably 10% by mass or less, more preferably 5% by mass or less. When the content is 10% by mass or less, the compatibility with the smoothing agent (A) is improved, thereby further improving the stability of the treatment agent. Note that any combination of the above upper and lower limits is also envisioned.

[0030] (Hydroxy Compound (C)) Examples of the hydroxy compound (C) used in the treatment agent of this embodiment include aliphatic alcohols having 8 to 24 carbon atoms, and alkylene oxide adducts of aliphatic alcohols having 8 to 24 carbon atoms. By including the hydroxy compound (C) in the treatment agent, the stability of the treatment agent can be improved.

[0031] The aliphatic alcohol is not particularly limited with respect to the presence or absence of an unsaturated bond, and may be an aliphatic alcohol having a linear or branched hydrocarbon group. It may also be an alcohol having a cyclo ring. In the case of an alcohol having a branched hydrocarbon group, the branching position is not particularly limited, and for example, it may be a carbon chain branched at the α position or a carbon chain branched at the β position. In addition, it may be a primary alcohol or a secondary alcohol.

[0032] Specific examples of aliphatic alcohols having a linear or branched hydrocarbon group include capryl alcohol, 2-ethylhexanol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, pentadecyl alcohol, cetanol, stearyl alcohol (octadecanol), eicosanol, behenyl alcohol, tetracosanol, oleyl alcohol, 12-eicosyl alcohol, hexadecenyl alcohol, eicosenyl alcohol, octadecenyl alcohol, isododecyl alcohol, isotridecyl alcohol, isomyristyl alcohol, isohexadecyl alcohol, isostearyl alcohol, and isotetracosanol.

[0033] Specific examples of linear secondary alcohols include 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-eicosanol, 2-heneicosanol, 2-docosanol, 2-tricosanol, and 2-tetracosanol.

[0034] These aliphatic alcohols having 8 to 24 carbon atoms may be used alone or in combination of two or more. As the aliphatic alcohol constituting the alkylene oxide adduct of an aliphatic alcohol having 8 to 24 carbon atoms, the specific examples mentioned above can be used.

[0035] The alkylene oxide used as a raw material for the (poly)oxyalkylene structure constituting the alkylene oxide adduct of the aliphatic alcohol having 8 to 24 carbon atoms is preferably an alkylene oxide having 2 to 4 carbon atoms. Specific examples of the alkylene oxide include ethylene oxide, propylene oxide, butylene oxide, etc. The number of moles of the alkylene oxide added is appropriately set, but is preferably 0.1 to 60 moles, more preferably 1 to 40 moles, and even more preferably 2 to 30 moles. A range in which the above upper and lower limits are arbitrarily combined is also assumed. The number of moles of the alkylene oxide added indicates the number of moles of the alkylene oxide relative to 1 mole of the compound to be added in the charged raw material. The alkylene oxide may be used alone as one type of alkylene oxide, or may be used in an appropriate combination of two or more types of alkylene oxide. When two or more types of alkylene oxides are used, the addition form thereof may be any of block addition, random addition, and a combination of block addition and random addition, and is not particularly limited.

[0036] Specific examples of alkylene oxide adducts of aliphatic alcohols having 8 to 24 carbon atoms include alkylene oxide adducts of secondary alcohols having 10 to 12 carbon atoms and alkylene oxide adducts of primary alcohols having 14 and 15 carbon atoms.

[0037] These alkylene oxide adducts of aliphatic alcohols having 8 to 24 carbon atoms may be used alone or in combination of two or more. The lower limit of the content of the hydroxy compound (C) in the treatment agent is preferably 0.1% by mass or more, more preferably 0.5% by mass or more. When the content is 0.1% by mass or more, the stability of the treatment agent can be further improved. The upper limit of the content of the hydroxy compound (C) is preferably 10% by mass or less, more preferably 5% by mass or less. When the content is 10% by mass or less, the fiber-metal friction of the elastic fiber to which the treatment agent is applied can be further reduced. Note that any combination of the above upper and lower limits is also envisioned.

[0038] When the total content of the smoothing agent (A), the urea-modified silicone (B), and the hydroxy compound (C) in the treatment agent is taken as 100% by mass, it is preferable that the smoothing agent (A) is contained in an amount of 90.0% by mass or more and 99.8% by mass or less, the urea-modified silicone (B) is contained in an amount of 0.1% by mass or more and 5.0% by mass or less, and the hydroxy compound (C) is contained in an amount of 0.1% by mass or more and 5.0% by mass or less. By specifying the content within such a range, the fiber-metal friction of the elastic fiber to which the treatment agent is applied can be further reduced. In addition, the stability of the treatment agent can be further improved.

[0039] Second embodiment Next, a second embodiment of the elastic fiber according to the present invention will be described. The elastic fiber of this embodiment is an elastic fiber to which the treatment agent of the first embodiment is attached. The amount of the treatment agent of the first embodiment attached to the elastic fiber is not particularly limited, but from the viewpoint of further improving the effects of the present invention, it is preferable that the amount of the treatment agent not including the solvent is 0.1% by mass or more and 10% by mass or less.

[0040] The elastic fiber is not particularly limited, but examples thereof include polyester-based elastic fiber, polyamide-based elastic fiber, polyolefin-based elastic fiber, polyurethane-based elastic fiber, etc. Among these, polyurethane-based elastic fiber is preferable. In such a case, the effect of the present invention can be more effectively exhibited.

[0041] The manufacturing method of the elastic fiber of this embodiment is obtained by oiling the treatment agent of the first embodiment to the elastic fiber. The oiling method of the treatment agent is a method of attaching the agent to the elastic fiber in the spinning process of the elastic fiber. In addition, the oiling method of the treatment agent is preferably a method of attaching the agent to the elastic fiber in the spinning process of the elastic fiber by a neat oiling method without dilution. The oiling method can be a known method such as a roller oiling method, a guide oiling method, a spray oiling method, etc. The oiling roller is generally located between the die and the winding traverse, and can be applied to the manufacturing method of this embodiment. Among these, it is preferable to attach the treatment agent of the first embodiment to the elastic fiber, for example, a polyurethane-based elastic fiber, by an oiling roller located between the stretching rollers, because the effect is remarkable.

[0042] The method for producing the elastic fiber itself used in this embodiment is not particularly limited, and the fiber can be produced by a known method. For example, the method includes a wet spinning method, a melt spinning method, a dry spinning method, etc. Among these, the dry spinning method is preferably used from the viewpoint of excellent quality of the elastic fiber and production efficiency.

[0043] The effects of the treatment agent and elastic fiber of this embodiment will be described. (1) The treatment agent of this embodiment is constituted by blending a lubricant (A) and a urea-modified silicone (B). Therefore, it is possible to reduce fiber-metal friction of the elastic fiber to which the treatment agent is applied. It is also possible to reduce scum in the manufacturing process of the elastic fiber to which the treatment agent is applied. It is also possible to improve the stability of the treatment agent. In particular, it is possible to improve the stability of the treatment agent over time. It is also possible to improve the stability of the treatment agent even when the content of mineral oil as a lubricant in the treatment agent is high, for example, at 80 mass% or more.

[0044] (2) When the treatment agent further contains at least one hydroxy compound (C) selected from aliphatic alcohols having from 8 to 24 carbon atoms and alkylene oxide adducts of aliphatic alcohols having from 8 to 24 carbon atoms, the stability of the treatment agent can be further improved. In particular, the stability over time of the treatment agent can be further improved.

[0045] The above embodiment may be modified as follows: The above embodiment and the following modifications may be combined with each other to the extent that no technical contradiction occurs. The treatment agent of the above embodiment may further contain other components that are typically used in treatment agents, such as stabilizers for maintaining the quality of the treatment agent, antistatic agents, binders, antioxidants, ultraviolet absorbers, etc., within the scope of not impairing the effects of the present invention. The content of other components in the treatment agent is preferably 10% by mass or less, more preferably 5% by mass or less, from the viewpoint of efficiently exerting the effects of the present invention. EXAMPLES

[0046] In the following, examples will be given to more specifically describe the configuration and effects of the present invention, but the present invention is not limited to these examples. In the following examples and comparative examples, parts means parts by mass, and % means % by mass.

[0047] Test category 1 (preparation of treatment agent) The treating agents used in the examples and comparative examples were prepared using the components shown in Table 1 by the following preparation method.

[0048] Example 1 As the lubricant (A), 38.9 parts (%) of mineral oil (A1-1) having a kinematic viscosity of 40 Redwood seconds at 40°C and 10 mm 2 / s dimethyl silicone (A2-1) 60 parts (%), kinematic viscosity at 25 °C 170 mm 2 The treatment agent for Example 1 was prepared by thoroughly mixing and homogenizing 0.5 parts (%) of urea-modified silicone (B-1) of 1000 g / s, 0.5 parts (%) of 2-ethylhexanol (C-1) as an aliphatic alcohol, and 0.1 parts (%) of an ethylene oxide (7 moles) propylene oxide (12 moles) adduct of a primary alcohol having 14 or 15 carbon atoms (C-4) as an alkylene oxide adduct of an aliphatic alcohol.

[0049] (Example 2 11,14~17, Reference example 12,13,18~22, Comparative Examples 1 to 6) Example 2 11,14~17, Reference example 12,13,18~22 In Comparative Examples 1 to 6, the treatment agents were prepared in the same manner as in Example 1 by mixing the smoothing agent (A), the urea-modified silicone (B), the hydroxy compound (C), and the other components (D) in the ratios shown in Table 1.

[0050] The types of each component, i.e., smoothing agent (A), urea-modified silicone (B), hydroxy compound (C), and other component (D), in the treatment agent of each example, and the ratio of each component when the total content of each component is taken as 100% are shown in the "Smoothing agent (A)" column, "Urea-modified silicone (B)" column, "Hydroxy compound (C)" column, and "Other components (D)" column of Table 1, respectively.

[0051] [Table 1] Details of the smoothing agent (A), urea-modified silicone (B), hydroxy compound (C), and other components (D) listed in the classification column of Table 1 are as follows:

[0052] <Smoothing agent (A)> (Mineral oil (A1)) A1-1: Mineral oil with a kinematic viscosity of 40 Redwood seconds at 40°C A1-2: Mineral oil with a kinematic viscosity of 60 Redwood seconds at 40°C (Dimethyl silicone (A2)) A2-1: Kinematic viscosity at 25℃ is 10mm 2 / s Dimethyl Silicone A2-2: Kinematic viscosity at 25℃ is 20mm 2 / s Dimethyl Silicone <Urea-modified silicone (B)> B-1: Kinematic viscosity at 25°C is 170mm 2 / s Urea-modified silicone B-2: Kinematic viscosity at 25°C is 260mm 2 / s Urea-modified silicone B-3: Kinematic viscosity at 25°C is 370mm 2 / s Urea-modified silicone B-4: Kinematic viscosity at 25°C is 600mm 2 / s Urea-modified silicone B-5: Kinematic viscosity at 25°C is 1980mm 2 / s Urea-modified silicone B-6: Kinematic viscosity at 25°C is 3180mm 2 / s Urea-modified silicone <Hydroxy Compound (C)> (Fatty alcohol) C-1: 2-Ethylhexanol C-2: Octadecanol (Alkylene oxide adduct of aliphatic alcohol) C-3: Ethylene oxide (3 moles) adduct of secondary alcohol with 10 to 12 carbon atoms C-4: Ethylene oxide (7 moles) and propylene oxide (12 moles) adduct of primary alcohols with carbon numbers of 14 and 15 <Other ingredients (D)> D-1: Urea resin (aliphatic diurea having a structure obtained by reacting octadecylamine with methylenediphenyl diisocyanate) D-2: Kinematic viscosity at 25°C is 300mm 2 / s Polyether modified silicone D-3: Nonylphenol D-4: Kinematic viscosity at 25°C is 250mm 2 / s Amino modified silicone Test Category 2 (Manufacturing of Elastic Fibers) A prepolymer obtained from polytetramethylene glycol having a molecular weight of 2000 and diphenylmethane diisocyanate was subjected to a chain extension reaction with ethylenediamine in a dimethylformamide solution to obtain a spinning dope having a concentration of 30%. This spinning dope was dry-spun from a spinneret in a heated gas flow. Then, a neat treatment agent was fed to the dry-spun polyurethane-based elastic fiber by a roller oiling method from an oiling roller located between the stretching rollers before winding.

[0053] The elastic fiber thus roller-oiled was wound on a 58 mm long cylindrical paper tube at a winding speed of 600 m / min, via a traverse guide that gave a winding width of 38 mm, using a surface drive winder to obtain a package of 500 g of 40 denier dry spun polyurethane elastic fiber. The amount of the treatment agent attached was adjusted to 5% in each case by adjusting the rotation speed of the oiling roller.

[0054] The resulting roller-oiled dry-spun polyurethane elastic fiber packages were evaluated for fiber-metal friction and scumming of the elastic fiber, as well as for the stability of the treatment.

[0055] Test Category 3 (Evaluation of Elastic Fibers) (Evaluation of fiber-metal friction (FM friction)) A friction measurement meter (Aiko Sokki Co., Ltd., SAMPLE FRICTION UNIT MODEL TB-1) was used. A chrome-plated matte pin with a diameter of 1 cm and a surface roughness of 2S was placed between two free rollers as a metal abrasive, and the contact angle of the polyurethane-based elastic fiber drawn from a package (500 g roll) with respect to the chrome-plated matte pin was set to 90 degrees. Under conditions of 25°C and 60% RH, an initial tension (T1) of 5 g was applied to the entry side, and the secondary tension (T2) on the exit side when traveling at a speed of 100 m / min was measured every 0.1 seconds for 1 minute. The friction coefficient was calculated from the following formula. Furthermore, a relative value was calculated when the friction coefficient of Comparative Example 3 was set to 1.0, and evaluated according to the following criteria. The results are shown in the "FM friction" column of Table 1.

[0056] Friction coefficient = (2 / 3.14) x ln(T2 / T1) Evaluation criteria for fiber-metal friction ◎ (Good): Less than 0.9 ○(Acceptable): 0.9 or more, less than 1.0 × (defective): 1.0 or more (Scum's rating) After the evaluation of the above-mentioned fiber-metal friction, the accumulation state of scum in the yarn path of the chrome-plated matte pin used as the metal abrasive was visually observed, and the scum was evaluated according to the following criteria. The results are shown in the "Scum" column of Table 1.

[0057] ◎(Good): When scum is present × (bad): No scum (Stability of treatment agent when mixed) The components were mixed at 25°C and thoroughly stirred, after which the stability of the treatment agent at the time of blending was evaluated according to the following criteria. The results are shown in the "Stability" column of Table 1.

[0058] - Evaluation criteria for stability of treatment agents when mixed ◎ (Good): Colorless and transparent liquid ○(OK): White transparent liquid × (Not acceptable): If particles or sediment are present (Stability of treatment agent after 1 month) Each treatment agent prepared as described above was left to stand at 25°C for one month, and the stability of the treatment agent after one month was evaluated according to the following criteria. The results are shown in the "Stability" column of Table 1.

[0059] Evaluation criteria for stability of treatment agent after one month ◎ (Good): Colorless and transparent liquid ○(OK): White transparent liquid × (Not acceptable): If particles or sediment are present As is clear from the evaluation results of each Example and each Comparative Example in Table 1, the treatment agent of the present invention can reduce the fiber-metal friction of the elastic fiber to which the treatment agent is applied, and can reduce the scum generated when the elastic fiber to which the treatment agent is applied runs. In addition, the stability of the treatment agent can be improved.

Claims

1. A treatment agent for elastic fibers, comprising a smoothing agent (A) and a urea-modified silicone (B).

2. The urea-modified silicone (B) has a kinetic viscosity of 100 mm at 25° C. ２ / s or more 2000mm ２ The agent for treating elastic fibers according to claim 1, wherein the elastic fiber viscosity is 1 / s or less.

3. The lubricating agent (A) is a mineral oil (A1) having a kinetic viscosity of 5 mm at 25° C. ２ / s or more 20mm ２ 2. The treatment agent for elastic fibers according to claim 1, further comprising a dimethyl silicone (A2) of not more than 1.0 wt. / s.

4. The agent for treating elastic fibers according to claim 3 , wherein the dimethyl silicone (A2) is contained in the agent for treating elastic fibers in an amount of 10 mass % or more.

5. The treatment agent for elastic fibers according to claim 1 , wherein the treatment agent for elastic fibers contains the urea-modified silicone (B) in an amount of 0.1% by mass or more and 5.0% by mass or less.

6. The treatment agent for elastic fibers according to claim 1, further comprising at least one hydroxy compound (C) selected from aliphatic alcohols having 8 to 24 carbon atoms and alkylene oxide adducts of aliphatic alcohols having 8 to 24 carbon atoms.

7. 7. The treatment agent for elastic fibers according to claim 6, wherein the treatment agent contains the smoothing agent (A) in an amount of 90.0% by mass or more and 99.8% by mass or less, the urea-modified silicone (B) in an amount of 0.1% by mass or more and 5.0% by mass or less, and the hydroxy compound (C) in an amount of 0.1% by mass or more and 5.0% by mass or less, where the total content of the smoothing agent (A), the urea-modified silicone (B), and the hydroxy compound (C) is taken as 100% by mass.

8. An elastic fiber having the treating agent for elastic fibers according to any one of claims 1 to 7 adhered thereto.

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