Elastic fiber treatment agent and elastic fiber

Abstract

The present invention addresses the problem of providing: a treatment agent for elastic fibers, which is capable of reducing friction between fibers and metals and improving stability; and an elastic fiber to which the treatment agent for elastic fibers is adhered. This treatment agent for elastic fibers is characterized by containing a smoothing agent (A) and a urea-modified silicone (B). This elastic fiber is characterized in that a treatment agent for elastic fibers, which contains a smoothing agent (A) and a urea-modified silicone (B), adheres to the elastic fiber.

Description

Technical Field

[0001] This invention relates to an elastic fiber treatment agent capable of reducing inter-metal friction in elastic fibers treated with an elastic fiber treatment agent and improving stability, as well as elastic fibers coated with the elastic fiber treatment agent. Background Technology

[0002] For elastic fibers such as polyurethane-based elastic fibers, the adhesion between fibers is stronger compared to other synthetic fibers. Therefore, when elastic fibers are spun, wound into a package, and then pulled out of the package and fed into a processing step, there is a problem of difficulty in stably unwinding them from the package. Therefore, in order to improve the smoothness of elastic fibers compared to the past, treatment agents for elastic fibers containing smoothing agents such as silicone are sometimes used.

[0003] Previously known treatment agents for elastic fibers were disclosed in Patent Documents 1 and 2. Patent Document 1 discloses a treatment agent for elastic fibers comprising: at least one base component (A) selected from mineral oil, silicone oil, and ester oil; and a urea-based component (B), which is at least one selected from urea compounds and urea-carbamate compounds. Patent Document 2 discloses a lubricant for use in polyurethane elastic fibers, comprising a silicone-oxygenated olefin copolymer having a specified viscosity, mineral oil having a specified viscosity, nonylphenol, etc. Existing technical documents Patent documents

[0004] Patent Document 1: Japanese Patent No. 6663721 Patent Document 2: Japanese Patent Publication No. 45-40719 Summary of the Invention The problem that the invention aims to solve

[0005] However, existing elastic fiber treatment agents cannot fully achieve the effects of reducing inter-metal friction between elastic fibers and improving the stability of the elastic fiber treatment agent. Methods for solving problems

[0006] In order to solve the above-mentioned problems, the inventors conducted research and found that the composition of the treatment agent for elastic fibers, which is a mixture of smoothing agent (A) and urea-modified silicone (B), is suitable.

[0007] The various methods used to solve the above problems are recorded. The elastic fiber treatment agent of Method 1 is characterized in that it contains a smoothing agent (A) and a urea-modified silicone (B).

[0008] Regarding Method 2, in the elastic fiber treatment agent described in Method 1, the urea-modified silicone (B) has a kinematic viscosity of 100 mm at 25°C. 2 / s or higher and 2000mm 2 / s or less. Regarding method 3, in the elastic fiber treatment agent described in method 1 or method 2, the smoothing agent (A) contains mineral oil (A1) and has a kinematic viscosity of 5 mm at 25°C. 2 / s or higher and 20mm 2 Dimethyl silicone (A2) with a strength of less than / s.

[0009] Regarding method 4, in the elastic fiber treatment agent described in method 3, the dimethylsiloxane (A2) is contained in the elastic fiber treatment agent at a proportion of 10% by mass or more. Regarding Method 5, in any of Methods 1 to 4, the elastic fiber treatment agent contains the urea-modified silicone (B) in a proportion of 0.1% by mass or more and 5.0% by mass or less.

[0010] Regarding Method 6, the elastic fiber treatment agent described in any of Methods 1 to 5 further contains at least one hydroxyl compound (C) selected from aliphatic alcohols having 8 or more and 24 or fewer carbon atoms and alkylene oxide adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms.

[0011] Regarding method 7, in the elastic fiber treatment agent described in method 6, when the total content of the smoothing agent (A), the urea-modified silicone (B), and the hydroxyl compound (C) is set to 100% by mass, the smoothing agent (A) is contained in a proportion of 90.0% or more and 99.8% by mass or less, the urea-modified silicone (B) is contained in a proportion of 0.1% or more and 5.0% by mass or less, and the hydroxyl compound (C) is contained in a proportion of 0.1% or more and 5.0% by mass or less.

[0012] The elastic fiber of method 8 is characterized in that it is coated with a treatment agent for elastic fibers as described in any of methods 1 to 7. Invention Effects

[0013] According to the present invention, the inter-fiber-metal friction of elastic fibers treated with the elastic fiber treatment agent can be reduced, and the stability of the elastic fiber treatment agent can be improved. Detailed Implementation

[0014] (First Embodiment) The following describes a first embodiment of the treatment agent for elastic fibers of the present invention (hereinafter referred to as the treatment agent). The treatment agent of this embodiment includes a smoothing agent (A) and a urea-modified silicone (B). In addition, the treatment agent may further include at least one hydroxyl compound (C) selected from aliphatic alcohols having 8 or more and 24 or fewer carbon atoms, and alkylene oxide adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms.

[0015] (Smoothing Agent (A)) The smoothing agent (A) supplied in the treatment agent of this embodiment is mixed in the treatment agent as a base component to impart smoothness to the elastic fibers to which the treatment agent is applied. As the smoothing agent (A), mineral oil (A1) and silicone are preferably included. Other smoothing agents besides mineral oil (A1) and silicone can be, for example, ester oils, polyolefins, etc.

[0016] Examples of mineral oils (A1) include aromatic hydrocarbons, alkane hydrocarbons, and cycloalkanes. More specifically, examples include spindle oil and liquid paraffin. Commercially available mineral oils (A1) can be suitable, defined by their kinematic viscosity, etc. Furthermore, when using multiple mineral oils, the kinematic viscosity value when all mineral oils are mixed is used. By including mineral oil (A1) as a smoothing agent (A), the smoothness of the elastic fibers treated with the agent can be further improved.

[0017] The lower limit of the content of mineral oil (Al) 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 mineral oil (Al) in the treatment agent is preferably 99.95% by mass or less, more preferably 99.9% by mass or less. By limiting the content within this range, the smoothness of the elastic fibers treated with the treatment agent can be improved. In this embodiment, the content of mineral oil (Al) in the treatment agent is, for example, 19.2% by mass or more, 20% by mass or more, 23.7% by mass or more, 30% by mass or more, 38.9% by mass or more, 45% by mass or more, 47.4% by mass or more, 50% by mass or more, 57.2% by mass or more, 64% by mass or more, 69.9% by mass or more, 78.5% by mass or more, 88.9% by mass or more, 89.5% by mass or more, 96.2% by mass or more, 98.7% by mass or more, 99.5% by mass or more, 99.7% by mass or more, or 99.9% by mass or more. In addition, the content of mineral oil (A1) may be, for example, 99.9% by mass or less, 99.7% by mass or less, 99.5% by mass or less, 98.7% by mass or less, 96.2% by mass or less, 89.5% by mass or less, 88.9% by mass or less, 78.5% by mass or less, 69.9% by mass or less, 64% by mass or less, 57.2% by mass or less, 50% by mass or less, 47.4% by mass or less, 45% by mass or less, 38.9% by mass or less, 30% by mass or less, 23.7% by mass or less, 20% by mass or less, or 19.2% by mass or less. Furthermore, a range can be set by arbitrarily combining the above upper and lower limits.

[0018] As silicones, silicone oils other than urea-modified silicone (B) can be cited. Specific examples of silicone oils include dimethyl silicone, phenyl-modified silicone, amino-modified silicone, amide-modified silicone, polyether-modified silicone, amino-polyether-modified silicone, alkyl-modified silicone, alkylaralkyl-modified silicone, alkyl-polyether-modified silicone, ester-modified silicone, epoxy-modified silicone, methanol-modified silicone, mercapto-modified silicone, polyoxyethylene-modified silicone, and carboxyl-modified silicone. These silicone oils can be commercially available products, defined by factors such as kinematic viscosity. The kinematic viscosity can be appropriately set; for example, a kinematic viscosity of 2 cst (mm) at 25°C can be cited. 2 / s or more and 10000cst (mm) 2 / s or less. Additionally, a range can be set by arbitrarily combining the above upper and lower limits. The kinematic viscosity at 25°C is measured according to JIS Z 8803. Among these silicone oils, a kinematic viscosity of 5 mm at 25°C is preferred. 2 / s or higher and 20mm 2Dimethyl silicone (A2) with a density of less than / s. By applying this dimethyl silicone (A2), it is possible to reduce the inter-fiber-metal friction of elastic fibers treated with the agent.

[0019] From the viewpoint of improving inter-metal friction in the treatment agent, a lubricant preferably contains mineral oil (Al) and has a kinematic viscosity of 5 mm at 25°C. 2 / s or higher and 20mm 2 Dimethyl silicone (A2) with a strength of less than / s.

[0020] The lower limit of the content of 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 dimethyl silicone (A2) is preferably 85% by mass or less, more preferably 80% by mass or less. By limiting the content of dimethyl silicone (A2) within this range, the stability of the treatment agent can be further improved. In addition, the intermetallic friction of the fiber can be improved. In this embodiment, the content of dimethyl silicone (A2) in the treatment agent is, for example, 10% by mass or more, 20% by mass or more, 30% by mass or more, 37% by mass or more, 40% by mass or more, 44.5% by mass or more, 45% by mass or more, 48.2% by mass or more, 50% by mass or more, 60% by mass or more, 69% by mass or more, 70% by mass or more, 76% by mass or more, 77.7% by mass or more, or 80% by mass or more. Furthermore, the content of dimethylsilicone (A2) may be, for example, 80% by mass or less, 77.7% by mass or less, 76% by mass or less, 70% by mass or less, 69% by mass or less, 60% by mass or less, 50% by mass or less, 48.2% by mass or less, 45% by mass or less, 44.5% by mass or less, 40% by mass or less, 37% by mass or less, 30% by mass or less, 20% by mass or less, or 10% by mass or less. Additionally, a range can be set by arbitrarily combining the above upper and lower limits.

[0021] There are no particular limitations on ester oils; examples include ester oils made from fatty acids and alcohols. Ester oils can be made, for instance, from fatty acids and alcohols having an odd or even number of hydrocarbon groups.

[0022] The fatty acids used as raw materials for ester oils are not particularly restricted in terms of their number of carbon atoms, whether they have branches or not, or their number of atoms. For example, they can be higher fatty acids, fatty acids with aliphatic rings, or fatty acids with aromatic rings. Similarly, the alcohols used as raw materials for ester oils are not particularly restricted in terms of their number of carbon atoms, whether they have branches or not, or their number of atoms. For example, they can be higher alcohols, alcohols with aliphatic rings, or alcohols with aromatic rings.

[0023] Specific examples of ester oils include: (1) esters of aliphatic monools and aliphatic monocarboxylic acids such as octyl palmitate, laurate, oleate, isotriadecyl stearate, isotetracosyl oleate, propyl isostearate, and 2-ethylhexyl stearate; (2) esters of aliphatic polyols and aliphatic monocarboxylic acids such as 1,6-hexanediol didecanoate, glyceryl trioleate, trimethylolpropane trilaurate, and pentaerythritol tetraoctanoate; (3) dioleate of azelaic acid, dioleate of thiodipropionate, di(isohexadecyl) thiodipropionate, and thiodipropionate. (3) Ester compounds of aliphatic monools and aliphatic polycarboxylic acids, such as diisostearyl; (4) Ester compounds of aromatic monools and aliphatic monocarboxylic acids, such as benzyl oleate and benzyl laurate; (5) Complete ester compounds of aromatic polyols and aliphatic monocarboxylic acids, such as bisphenol A dilaurate; (6) Complete ester compounds of aliphatic monools and aromatic polycarboxylic acids, such as di(2-ethylhexyl) phthalate, diisostearyl isophthalate, and trioctyl trimellitate; (7) Natural oils such as coconut oil, rapeseed oil, sunflower oil, soybean oil, castor oil, sesame oil, fish oil, and tallow; etc.

[0024] Polyolefins are used as smoothing agents, specifically poly-α-olefins. Specific examples of polyolefins include poly-α-olefins obtained by polymerizing 1-butene, 1-hexene, and 1-decene. Commercially available poly-α-olefins are suitable.

[0025] These smoothing agents (A) can 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 limiting the content of the smoothing agent (A) to this range, the smoothness of the elastic fibers treated with the treatment agent can be further improved. In this embodiment, the content of the smoothing agent (A) in the treatment agent is, for example, 87% by mass or more, 90% by mass or more, 93.7% by mass or more, 94% by mass or more, 94.5% by mass or more, 96% by mass or more, 96.2% by mass or more, 97.2% by mass or more, 97.4% by mass or more, 97.7% by mass or more, 98.2% by mass or more, 98.5% by mass or more, 98.7% by mass or more, 98.9% by mass or more, 99% by mass or more, 99.2% by mass or more, 99.5% by mass or more, 99.7% by mass or more, or 99.9% by mass or more. Furthermore, the content of the smoothing agent (A) may be, for example, 99.9% by mass or less, 99.7% by mass or less, 99.5% by mass or less, 99.2% by mass or less, 99% by mass or less, 98.9% by mass or less, 98.7% by mass or less, 98.5% by mass or less, 98.2% by mass or less, 97.7% by mass or less, 97.4% by mass or less, 97.2% by mass or less, 96.2% by mass or less, 96% by mass or less, 94.5% by mass or less, 94% by mass or less, 93.7% by mass or less, 90% by mass or less, or 87% by mass or less. Additionally, a range can be set by arbitrarily combining the above-mentioned upper and lower limits.

[0026] (Urea-modified silicone (B)) The urea-modified silicone (B) supplied in the treatment agent of this embodiment can reduce inter-fiber metal friction of the elastic fibers to which the treatment agent is applied. In particular, when mineral oil (A1) is used as a lubricant (A), it exhibits excellent compatibility with mineral oil (A1), thus improving the stability of the treatment agent. Urea-modified silicone (B) refers to a modified silicone compound having, for example, -HN-CO-NH2 or -HN-CO-NHR (R: hydrocarbon group) as substituents. The organopolysiloxane constituting the main chain of the urea-modified silicone (B) can be linear or branched, and the substituents can be located at the end of the main chain or on a side chain.

[0027] Examples of hydrocarbon groups constituting substituents include alkyl groups with 1 or more but less than 12 carbon atoms, aryl groups with 6 or more but less than 10 carbon atoms, and aralkyl groups with 7 or more but less than 10 carbon atoms. Specific examples of alkyl groups with 1 or more but less than 12 carbon atoms include methyl, ethyl, propyl, butyl, pentyl, hexyl, cyclohexyl, octyl, decyl, and dodecyl. Specific examples of aryl groups with 6 or more but less than 10 carbon atoms include phenyl and tolyl. Specific examples of aralkyl groups with 7 or more but less than 10 carbon atoms include benzyl and phenethyl.

[0028] These urea-modified silicones (B) can be used alone or in combination of two or more. The kinematic viscosity of urea-modified silicone (B) is appropriately set, preferably 50 cst (mm) at 25°C. 2 / s or more and 10000cst (mm) 2 / s or less, more preferably 100cst (mm) 2 / s) or more and 2000cst (mm) 2 The kinematic viscosity of the urea-modified silicone (B) at 25°C is, for example, 170 mm³ / s. 2 / s or more, 260mm 2 / s or higher, 370mm 2 / s or higher, 600mm 2 / s or more, 1980mm 2 / s or higher, or 3180mm 2 / s or more. Additionally, the kinematic viscosity of urea-modified silicone (B) at 25°C is, for example, 3180 mm³ / s. 2 / s or less, 1980mm 2 / s or less, 600mm 2 / s or less, 370mm 2 / s or less, 260mm 2 / s or less, or 170mm 2 / s or less. Additionally, a range can be set by arbitrarily combining the above upper and lower limits. The kinematic viscosity at 25°C was measured according to JIS Z 8803. By limiting the kinematic viscosity of urea-modified silicone (B) to this range, the stability of the treatment agent, especially its stability over time, can be further improved.

[0029] The lower limit of the content of 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 inter-fiber-metal friction of the elastic fibers to which the treatment agent is applied can be further reduced. The upper limit of the content of 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 stability of the treatment agent can be further improved by increasing its compatibility with the smoothing agent (A). In this embodiment, the content of urea-modified silicone (B) in the treatment agent is, for example, 0.1% by mass or more, 0.3% by mass or more, 0.5% by mass or more, 0.6% by mass or more, 0.8% by mass or more, 1% by mass or more, 2% by mass or more, 3% by mass or more, 5% by mass or more, or 8% by mass or more. Furthermore, the content of urea-modified silicone (B) may be, for example, 8% by mass or less, 5% by mass or less, 3% by mass or less, 2% by mass or less, 1% by mass or less, 0.8% by mass or less, 0.6% by mass or less, 0.5% by mass or less, or 0.3% by mass or less. Additionally, a range can be set by arbitrarily combining the above upper and lower limits.

[0030] (Hydroxy compound (C)) Examples of hydroxyl compounds (C) in the treatment agent provided in this embodiment include aliphatic alcohols having 8 or more and 24 or fewer carbon atoms, and alkylene oxide adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms. By including hydroxyl compounds (C) in the treatment agent, the stability of the treatment agent can be improved.

[0031] As an aliphatic alcohol, there are no particular restrictions regarding the presence or absence of unsaturated bonds; it can be an aliphatic alcohol with straight-chain or branched hydrocarbon groups. It can be an alcohol with an aliphatic ring. In the case of an alcohol with branched hydrocarbon groups, there are no particular restrictions on the branching position; for example, it can be a carbon chain branched at the α-position or a carbon chain branched at the β-position. Furthermore, it can be a primary alcohol or a secondary alcohol.

[0032] Specific examples of aliphatic alcohols having straight-chain or branched hydrocarbon groups include octanol, 2-ethylhexanol, lauryl alcohol, tridecanool, myristol, pentadecanool, cetyl alcohol, stearyl alcohol (octadecanool), eicosanool, behenol, tetradecanool, oleyl alcohol, 12-eicosanool, hexadecenol, eicosenoenol, octadecenol, isodecanol, isotrimesterol, isotrimesterol, isomyristol, isohexadecanol, isostearyl alcohol, isotearotetradecanool, etc.

[0033] Specific examples of straight-chain secondary alcohols include 2-octanol, 2-nonanol, 2-decanol, 2-undecanol, 2-dodecanol, 2-tetanetanol, 2-tetradecanol, 2-pentadecanol, 2-hexadecanol, 2-heptadecanol, 2-octadecanol, 2-nonadecanol, 2-eicosanetanol, 2-eicosanetanol, 2-docodecanol, 2-tridecanol, and 2-tetradecanol.

[0034] These aliphatic alcohols with 8 or more carbon atoms and 24 or fewer can be used alone or in combination of two or more. The aliphatic alcohols that constitute alkylene oxide adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms can be specific examples of the aliphatic alcohols having 8 or more and 24 or fewer carbon atoms as described above.

[0035] Regarding the epoxide used as a raw material constituting a (poly)oxyolefin structure of an epoxide adduct of an aliphatic alcohol having 8 or more and 24 or fewer carbon atoms, epoxides with 2 to 4 carbon atoms are preferred. Specific examples of epoxides include ethylene oxide, propylene oxide, and butane oxide. The molar number of epoxides added can be suitably set, preferably 0.1 moles or more and 60 moles or less, more preferably 1 mole or more and 40 moles or less, and even more preferably 2 moles or more and 30 moles or less. A range formed by any combination of the above upper and lower limits can also be set. In addition, the molar number of epoxides added represents the number of moles of epoxide relative to 1 mole of the target compound added to the raw material. An epoxide can be used alone, or two or more epoxides can be suitably combined. When using two or more epoxides, their addition method can be any of block addition, random addition, or a combination of block addition and random addition, without particular limitation.

[0036] Specific examples of alkylene oxide adducts of aliphatic alcohols with 8 or more but less than 24 carbon atoms include alkylene oxide adducts of secondary alcohols with 10 to 12 carbon atoms and alkylene oxide adducts of primary alcohols with 14 or 15 carbon atoms.

[0037] These alkyl oxide adducts of aliphatic alcohols with 8 or more but less than 24 carbon atoms can be used alone or in combination of two or more. The lower limit of the content of hydroxyl 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 hydroxyl 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 inter-fiber-metal friction of the elastic fibers to which the treatment agent is applied can be further reduced. In this embodiment, the content of hydroxyl compound (C) in the treatment agent is, for example, 0.5% by mass or more, 0.6% by mass or more, 1% by mass or more, 1.3% by mass or more, 2% by mass or more, 2.2% by mass or more, 3.5% by mass or more, or 5% by mass or more. Alternatively, the content of hydroxyl compound (C) is, for example, 10% by mass or less, 5% by mass or less, 3.5% by mass or less, 2.2% by mass or less, 2% by mass or less, 1.3% by mass or less, 1% by mass or less, or 0.6% by mass or less. In addition, a range can be set by arbitrarily combining the above upper and lower limits.

[0038] When the total percentage of the smoothing agent (A), urea-modified silicone (B), and the aforementioned hydroxyl compound (C) in the treatment agent is set to 100% by mass, it is preferable that the smoothing agent (A) is present in a proportion of 90.0% to 99.8% by mass, the urea-modified silicone (B) in a proportion of 0.1% to 5.0% by mass, and the hydroxyl compound (C) in a proportion of 0.1% to 5.0% by mass. By limiting this range, the inter-fiber-metal friction of the elastic fibers treated with the treatment agent can be further reduced. Furthermore, the stability of the treatment agent can be further improved.

[0039] (Second Implementation) Next, a second embodiment embodying the elastic fiber of the present invention will be described. The treatment agent of the first embodiment is attached to the elastic fiber of this embodiment. That is, according to this embodiment, a treated elastic fiber consisting of an elastic fiber and a treatment agent attached thereto is provided. There is no particular limitation on the amount of treatment agent attached to the elastic fiber, but from the viewpoint of further improving the effect of the present invention, it is preferable to attach the treatment agent at a ratio of 0.1% by mass or more and 10% by mass or less, based on the amount of solvent-free treatment agent.

[0040] There are no particular limitations on the type of elastic fiber used; examples include polyester-based elastic fibers, polyamide-based elastic fibers, polyolefin-based elastic fibers, and polyurethane-based elastic fibers. Among these, polyurethane-based elastic fibers are preferred. In this case, the performance of the present invention can be further improved.

[0041] The method for manufacturing elastic fibers according to this embodiment includes applying the treatment agent of the first embodiment to the elastic fibers. As the method for applying the treatment agent, a method of applying it without dilution during the spinning process of the elastic fibers is preferred. Known methods such as roller oiling, yarn guide oiling, and spray oiling can be used as the adhesion method. Regarding the oiling roller, it is common to locate it between the nozzle and the traverse take-up device, and this method is also applicable in the manufacturing method of this embodiment. Among these, using an oiling roller located between the stretching rollers to adhere the treatment agent of the first embodiment to the elastic fibers, such as polyurethane-based elastic fibers, can significantly improve the effect and is therefore preferred.

[0042] The manufacturing method of the elastic fiber itself applicable to this embodiment is not particularly limited, and it can be manufactured using known methods. Examples include wet spinning, melt spinning, and dry spinning. Among these, from the viewpoint of superior elastic fiber quality and manufacturing efficiency, dry spinning is preferred.

[0043] The effects of the treatment agent and elastic fibers in this embodiment will be explained. (1) The treatment agent of this embodiment contains a smoothing agent (A) and urea-modified silicone (B). Therefore, the inter-fiber-metal friction of the elastic fibers to which the treatment agent is applied can be reduced. In addition, the scum in the manufacturing process of the elastic fibers to which the treatment agent is applied can be reduced. Furthermore, the stability of the treatment agent can be improved. In particular, the long-term stability of the treatment agent can be improved. In addition, regarding the content of mineral oil as a smoothing agent, even if it contains a high concentration of, for example, 80% by mass or more in the treatment agent, the stability of the treatment agent can be improved.

[0044] (2) When the treatment agent further contains at least one hydroxyl compound (C) selected from aliphatic alcohols having 8 or more and 24 or fewer carbon atoms, and epoxide adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms, the stability of the treatment agent can be further improved. In particular, the long-term stability of the treatment agent can be further improved.

[0045] It should be noted that the above implementation methods can also be modified as follows. The above implementation methods and the following modifications can be combined with each other within the scope of technical inconsistency. In the treatment agent described above, without impairing the effects of the present invention, other components commonly used in treatment agents, such as stabilizers, charge control agents, thickeners, antioxidants, and ultraviolet absorbers, can be further mixed in as other ingredients to maintain the quality of the treatment agent. Furthermore, from the viewpoint of effectively utilizing the performance 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. Example

[0046] Hereinafter, embodiments are given to illustrate the structure and effects of the present invention in more detail, but the present invention is not limited to these embodiments. It should be noted that in the following embodiments and comparative examples, parts refer to parts by mass, and % refers to percentages by mass.

[0047] Experimental Group 1 (Preparation of the Treatment Agent) The treatment agents used in each embodiment and comparative example were prepared using the components shown in Table 1 by the following preparation method.

[0048] (Example 1) 38.9 parts (%) of mineral oil (A1-1) with a kinematic viscosity of 40 Rexroth seconds at 40°C as lubricant (A) and a kinematic viscosity of 10 mm at 25°C were used as lubricant (A). 2 The kinematic viscosity of 60 parts (%) of dimethyl silicone (A2-1) at 25°C is 170 mm. 2 The treatment agent of Example 1 was prepared by thoroughly mixing 0.5 parts (%) of urea-modified silicone (B-1), 0.5 parts (%) of 2-ethylhexanol (C-1) as an aliphatic alcohol, and 0.1 parts (%) of ethylene oxide (7 mol) and propylene oxide (12 mol) adduct (C-4) as a primary alcohol with carbon atoms of 14 or 15 in the form of an epoxide adduct of an aliphatic alcohol.

[0049] (Examples 2-22, Comparative Examples 1-6) In Examples 2-22 and Comparative Examples 1-6, the smoothing agent (A), urea-modified silicone (B), hydroxyl compound (C), and other components (D) were mixed in the proportions shown in Table 1, as in Example 1, thereby preparing the treatment agent.

[0050] The types of each component in the smoothing agent (A), urea-modified silicone (B), hydroxyl compound (C), and other components (D) in each example treatment agent, and the proportion of each component when the total content of each component is 100%, are shown in the "Smoothing Agent (A)", "Urea-modified Silicone (B)", "Hydroxyl Compound (C)" and "Other Components (D)" columns of Table 1, respectively.

[0051] [Table 1]

[0052] The details of the smoothing agents (A), urea-modified silicones (B), hydroxyl compounds (C), and other ingredients (D) listed in the grouping columns of Table 1 are as follows. <Smoothing Agent (A)> (Mineral oil (A1)) A1-1: Mineral oil with a kinematic viscosity of 40 Reiss seconds at 40℃. A1-2: Mineral oil with a kinematic viscosity of 60 Reiter seconds at 40℃. (Dimethylsilicone (A2)) A2-1: The kinematic viscosity at 25℃ is 10 mmHg. 2 / s of dimethyl silicone A2-2: The kinematic viscosity at 25℃ is 20 mmHg. 2 / s of dimethyl silicone <Urea-modified silicone (B)> B-1: The kinematic viscosity at 25℃ is 170 mmHg. 2 / s urea-modified silicone B-2: Kinematic viscosity at 25℃ is 260 mmHg. 2 / s urea-modified silicone B-3: Kinematic viscosity at 25℃ is 370 mmHg 2 / s urea-modified silicone B-4: Kinematic viscosity at 25℃ is 600 mmHg 2 / s urea-modified silicone B-5: Kinematic viscosity at 25℃ is 1980 mmHg. 2 / s urea-modified silicone B-6: The kinematic viscosity at 25℃ is 3180 mmHg. 2 / s urea-modified silicone <Hydroxy Compound (C)> (Aliphatic alcohols) C-1: 2-Ethylhexanol C-2: Octadecanol (Epoxyalkane adducts of aliphatic alcohols) C-3: ethylene oxide (3 moles) adduct of secondary alcohols with 10-12 carbon atoms. C-4: Adducts of ethylene oxide (7 mol) and propylene oxide (12 mol) of primary alcohols with 14 or 15 carbon atoms. <Other Ingredients (D)> D-1: Urea resin (an aliphatic diurea with a structure formed by reacting octadecaneamine with methylene diphenyl diisocyanate) D-2: Kinematic viscosity at 25℃ is 300 mmHg 2 / s of polyether-modified silicone D-3: Nonylphenol D-4: Kinematic viscosity at 25℃ is 250 mmHg 2 / s of amino-modified silicone Experimental Group 2 (Manufacturing of Elastic Fibers) A prepolymer obtained from polytetramethylene glycol (molecular weight 2000) and diphenylmethane diisocyanate was subjected to a chain extension reaction with ethylenediamine in a dimethylformamide solution to obtain a 30% spinning solution. This spinning solution was then dry-spun through a spinneret in a heated gas stream. Subsequently, the polyurethane-based elastic fibers obtained by dry spinning were cleanly oiled using a roller-type oiling method via an oiling roller located between the pre-winding stretching rollers.

[0053] The elastic fibers, coated with the treatment agent via roller oiling as described above, are wound onto a 58mm long cylindrical paper tube using a surface-driven winding machine with a traverse yarn guide capable of imparting a 38mm roll width, at a winding speed of 600m / min, yielding a 500g package of 40 denier dry-spun polyurethane elastic fibers. The amount of treatment agent applied is adjusted by uniformly adjusting the rotation speed of the oiling rollers to 5%.

[0054] Using the resulting roll, the inter-metal friction of the elastic fibers and scum were evaluated. Additionally, the stability of the treatment agent was evaluated. Experimental Group 3 (Evaluation of Elastic Fibers) (Evaluation of fiber-metal inter-fiber friction (FM friction)) A friction tester (manufactured by Eiko Test Instruments Co., Ltd., Sample Friction Unit Model TB-1) was used. A chrome-plated satin-finished pin with a diameter of 1 cm and a surface roughness of 2S was placed between two free rollers as a metal friction element, such that the contact angle between the polyurethane-based elastic fiber drawn from the roll (500g roll) and the chrome-plated satin-finished pin was 90 degrees. Under conditions of 25°C and 60% RH, an initial tension (T1) of 5g was applied on the inlet side, and two tensions (T2) on the outlet side were measured every 0.1 seconds at a speed of 100 m / min for 1 minute. The coefficient of friction was calculated using the following formula. The relative value when the coefficient of friction of Comparative Example 3 was set to 1.0 was then calculated and evaluated according to the following criteria. The results are shown in the "FM Friction" column of Table 1.

[0055] Coefficient of friction = (2 / 3.14) ×ln(T2 / T1) Evaluation criteria for fiber-metal friction ◎(Good): Less than 0.9 ○ (Pass): 0.9 or higher and less than 1.0 × (Poor): 1.0 or higher (Evaluation of scum) In the evaluation of fiber-metal friction described above, after the evaluation of fiber-metal friction is completed, the accumulation state of scum in the thread of the chrome-plated satin-finish pin used as a metal friction body is observed with the naked eye, and the scum is evaluated according to the following criteria. The results are shown in the "Scum" column of Table 1.

[0056] ◎(Good): Scum is present. × (Defective): No scum. (Stability of the treatment agent during mixing) The components were mixed at 25°C and thoroughly stirred. The stability of the treatment agent during mixing was evaluated according to the following criteria. The results are shown in the "Stability" column of Table 1.

[0057] Evaluation criteria for the stability of treatment agents during mixing ◎(Good): Colorless and transparent liquid ○ (Pass): White, transparent liquid × (Poor): Contains particles or sediment. (Stability of the 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.

[0058] Evaluation criteria for the stability of the treatment agent after 1 month ◎(Good): Colorless and transparent liquid ○ (Pass): White, transparent liquid × (Poor): Contains particles or sediment. According to the evaluation results of each embodiment relative to each comparative example in Table 1, it can be seen that the treatment agent of the present invention can reduce the inter-fiber-metal friction of the elastic fibers to which the treatment agent is applied, and can reduce the scum generated when the elastic fibers to which the treatment agent is applied move. In addition, the stability of the treatment agent can be improved.

[0059] This disclosure also includes the following methods. (Postscript 1) A treatment agent for elastic fibers, applied in the spinning process, is characterized by containing a smoothing agent (A) and a urea-modified silicone (B), wherein the urea-modified silicone (B) has a kinematic viscosity of 100 mmHg at 25°C. 2 / s or higher and 2000mm 2 / s or less.

[0060] (Postscript 2) According to the elastic fiber treatment agent described in Appendix 1, the smoothing agent (A) contains mineral oil (Al) and has a kinematic viscosity of 5 mm at 25°C. 2 / s or higher and 20mm 2 Dimethyl silicone (A2) with a strength of less than / s.

[0061] (Note 3) According to Appendix 2, the elastic fiber treatment agent contains the dimethylsiloxane (A2) in a proportion of 10% by mass or more.

[0062] (Postscript 4) According to Appendix 1, the elastic fiber treatment agent contains the urea-modified silicone (B) in a proportion of 0.1% by mass or more and 5.0% by mass or less.

[0063] (Note 5) The elastic fiber treatment agent according to Appendix 1 further contains at least one hydroxy compound (C) selected from aliphatic alcohols having 8 or more and 24 or fewer carbon atoms and alkyl oxidase adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms.

[0064] (Note 6) According to the elastic fiber treatment agent described in Appendix 5, when the total content of the smoothing agent (A), the urea-modified silicone (B), and the hydroxyl compound (C) is set to 100% by mass, the smoothing agent (A) is contained in a proportion of 90.0% by mass or more and 99.8% by mass or less, the urea-modified silicone (B) is contained in a proportion of 0.1% by mass or more and 5.0% by mass or less, and the hydroxyl compound (C) is contained in a proportion of 0.1% by mass or more and 5.0% by mass or less.

[0065] (Note 7) An elastic fiber, characterized in that it is coated with any one of the elastic fiber treatment agents according to claims 1 to 6.

Claims

1. A treatment agent for elastic fibers, characterized in that, It contains a smoothing agent (A) and urea-modified silicone (B).

2. The treatment agent for elastic fibers according to claim 1, wherein, The urea-modified silicone (B) has a kinematic viscosity of 100 mmHg at 25°C. 2 / s or higher and 2000mm 2 / s or less.

3. The treatment agent for elastic fibers according to claim 1, wherein, The smoothing agent (A) contains mineral oil (Al) and has a kinematic viscosity of 5 mm at 25°C. 2 / s or higher and 20mm 2 Dimethyl silicone (A2) with a strength of less than / s.

4. The treatment agent for elastic fibers according to claim 3, wherein, The treatment agent for elastic fibers contains dimethylsiloxane (A2) at a proportion of 10% by mass or more.

5. The treatment agent for elastic fibers according to claim 1, wherein, The urea-modified silicone (B) is contained in the elastic fiber treatment agent at a ratio 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 hydroxyl compound (C) selected from aliphatic alcohols having 8 or more and 24 or fewer carbon atoms and alkyl oxidase adducts of aliphatic alcohols having 8 or more and 24 or fewer carbon atoms.

7. The treatment agent for elastic fibers according to claim 6, wherein, When the total content of the smoothing agent (A), the urea-modified silicone (B), and the hydroxyl compound (C) is set to 100% by mass, the smoothing agent (A) is contained in a proportion of 90.0% or more and 99.8% by mass or less, the urea-modified silicone (B) is contained in a proportion of 0.1% or more and 5.0% by mass or less, and the hydroxyl compound (C) is contained in a proportion of 0.1% or more and 5.0% by mass or less.

8. An elastic fiber, characterized in that, It is coated with the elastic fiber treatment agent according to any one of claims 1 to 7.

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