JP5632982B2 - Elastic fiber treatment agent and elastic fiber - Google Patents

Description

  The present invention relates to an elastic fiber treating agent and an elastic fiber.

  Conventional processing agents for elastic fibers use silicone oil, mineral oil, ester oil and the like as a base component. Recently, the spinning speed when producing elastic fibers has been increased, and the recent demand for elastic fibers has led to the finer De, so the problem is that the yarn is taken off by rollers and nozzles during oiling. In order to solve this problem, a processing agent component having a low viscosity is often used.

For example, Patent Document 1, a viscosity at 25 ° C. is a diorganopolysiloxane of 100 mm ² / s or less diorganopolysiloxane and 5000~1500mm ² / s 85~95: The ingredients were mixed at a ratio of 15 to 5 An elastic fiber oil used at 40% by weight or more is described. Patent Document 2 describes an oil agent for polyurethane elastic fibers comprising mineral oil or polydiorganosiloxane and amino-modified silicone.

JP 58-104283 A JP 61-97471 A

  However, when the oil agent described in Patent Document 1 and Patent Document 2 is used, since the oil agent does not stay between yarns after the Cheese, the sticking progresses over time, and the unraveling property is improved. There is a problem that gets worse. In addition, when mineral oil or ester oil having a low viscosity is used, there is a problem that the elastic fiber swells and the original performance is not exhibited.

  An object of the present invention is to provide a treatment agent for elastic fibers which can impart excellent unwinding property even with low viscosity, and an elastic fiber to which the treatment agent is imparted.

  As a result of intensive studies, the inventors of the present invention have found that the elastic fiber treatment agent containing the base component (A) and the specific low molecular weight siloxane (B) reduces the viscosity at the time of oiling. The low molecular weight siloxane evaporates to increase the viscosity of the treatment agent on the surface of the yarn, and as a result, the treatment agent tends to stay between the yarns. Reached.

  That is, the present invention is an elastic fiber treating agent containing at least one base component (A) selected from silicone oil, mineral oil and ester oil, and further comprises a siloxane represented by the following general formula (1): And at least one low molecular weight siloxane (B) selected from siloxanes represented by the following general formula (2).

（式（１）中、ｍは１〜４の整数を示す。）

(In formula (1), m represents an integer of 1 to 4.)

（式（２）中、ｎは３〜６の整数を示す。）

(In formula (2), n represents an integer of 3 to 6)

The weight ratio of the low molecular weight siloxane (B) in the entire treatment agent is preferably 0.001 to 50% by weight.
Moreover, it is preferable that the viscosity (25 degreeC) of the said processing agent is 3-20 mm < ² > / s.
The weight ratio of the base component (A) in the entire treatment agent is preferably 40 to 99.99% by weight.

The viscosity (25 ° C.) of the silicone oil as the base component (A) is preferably 5 mm ² / s or more and less than 50 mm ² / s. The treating agent of the present invention further contains a component (C) comprising an organopolysiloxane having a viscosity (25 ° C.) of 50 mm ² / s or more and / or an amino-modified silicone, and occupies the entire treating agent. The weight ratio of (C) is preferably 0.01 to 10% by weight.

  The elastic fiber of the present invention is one in which the elastic fiber main body is provided with 0.1 to 15% by weight of the elastic fiber treatment agent.

  The treatment agent for elastic fibers of the present invention can impart excellent unwinding properties to the elastic fibers even when the viscosity is low. Since the elastic fiber of the present invention is provided with the elastic fiber treatment agent of the present invention, the elastic fiber has excellent unwinding properties.

The schematic diagram explaining the measuring method of roller static electricity generation amount. The schematic diagram explaining the measuring method of knitting tension | tensile_strength, and the measuring method of the amount of static electricity generation. The schematic diagram explaining the measuring method of the friction coefficient between fibers. The schematic diagram explaining the measuring method of unwinding speed ratio.

  The processing agent for elastic fibers of the present invention is a processing agent for elastic fibers containing a base component (A) and further containing a specific low molecular weight siloxane (B). Details will be described below.

[Base component (A)]
The base component (A) of the present invention is at least one selected from silicone oil, mineral oil and ester oil. Therefore, you may use together 1 type, or 2 or more types as a base component.
The weight ratio of the base component (A) in the entire treatment agent is preferably 40 to 99.99% by weight, more preferably 50 to 99% by weight, and even more preferably 70 to 95% by weight. If it is less than 40% by weight, the smoothness of the yarn may be insufficient.

The silicone oil is not particularly limited, and examples thereof include polydimethylsiloxane, polyalkylsiloxane, and polyalkylphenylsiloxane. You may use together 1 type, or 2 or more types.
The number average molecular weight of the silicone oil is preferably 700 or more, more preferably 800 to 4000, and still more preferably 1000 to 3000. The viscosity of the silicone oil (25 ° C.) is preferably less than ^{5 mm} 2 / s or more 50 mm ² / s, more preferably 6~40mm ² / s, more preferably 9~30mm ² / s.
Siloxane bonds of the silicone oil: amount of coupling ^{(SiOR 1 R 2 R 1,} R 2 represents an organic group) is preferably 10 to 55, more preferably from 12 to 45, more preferably 14 to 40.
The proportion of silicone oil in the total base component is preferably 50% by weight or more, more preferably 55% by weight or more, and further preferably 60% by weight or more. If it is less than 50% by weight, the compatibility with the low-molecular siloxane may deteriorate.

The mineral oil is not particularly limited, and examples thereof include machine oil, spindle oil, and liquid paraffin. Among these, as the mineral oil, liquid paraffin is preferable because the generation of odor is low. Mineral oil may use together 1 type, or 2 or more types.
The viscosity of mineral oil (25 ° C.) is preferably at least ^{5 mm} 2 / s, more preferably 5 to 50 mm ² / s, more preferably 5 to 30 mm ² / s. If the viscosity (25 ° C.) is less than 5 mm ² / s, the yarn may swell, which is not preferable.
The proportion of the mineral oil in the entire base component is not particularly limited, but is preferably 50% by weight or less, more preferably 40% by weight or less, and even more preferably 30% by weight or less. If the mineral oil is more than 50% by weight, the compatibility with the low-molecular siloxane may deteriorate.

  Although it does not specifically limit as ester oil, The ester manufactured from a fatty acid and alcohol can be mentioned. Examples of ester oils include esters produced from fatty acids selected from the following and alcohols, but esters that do not use the following fatty acids or alcohols as raw materials may also be used. The ester oil may be used alone or in combination of two or more.

The fatty acid is not particularly limited in terms of its carbon number, presence or absence of branching, valence, etc., and may be a higher fatty acid, a cyclic fatty acid, or a fatty acid containing an aromatic ring. Examples of the fatty acid include caprylic acid, 2-ethylhexylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid, oleic acid, arachic acid, behenic acid, lignoselenic acid, adipic acid, and sebacic acid. And benzoic acid.
The alcohol is not particularly limited with respect to its carbon number, presence or absence of branching, valence, etc., and may be a higher alcohol, a cyclic alcohol, or an alcohol containing an aromatic ring. Examples of the alcohol include octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, ethylene glycol, hexanediol, glycerin, trimethylolpropane, Examples include pentaerythritol, sorbitol, sorbitan and the like.

The viscosity of the ester oil (25 ° C.) is preferably at least ^{5 mm} 2 / s, more preferably 5 to 50 mm ² / s, more preferably 5 to 30 mm ² / s. If the viscosity (25 ° C.) is less than 5 mm ² / s, the yarn may swell, which is not preferable.
The proportion of the ester oil in the entire base component is not particularly limited, but is preferably 50% by weight or less, more preferably 40% by weight or less, and further preferably 30% by weight or less. If the ester oil exceeds 50% by weight, the compatibility with the low-molecular siloxane may be deteriorated.

[Low molecular weight siloxane (B)]
The treating agent of the present invention essentially contains at least one low molecular weight siloxane (B) selected from the siloxane represented by the general formula (1) and the siloxane represented by the general formula (2). These low molecular weight siloxanes may be used alone or in combination of two or more.
In addition to the above base component (A), the low viscosity and good smoothness low molecular weight siloxane (B) can be used to reduce the viscosity of the treatment agent and reduce friction at the oiling roller and oiling nozzle. Can be prevented. At the same time, since the low molecular weight siloxane (B) is volatilized or decomposed and volatilized without remaining as an impurity after becoming Cheese, the viscosity of the treating agent on the yarn surface becomes high, and the unraveling property after making Cheese is good. In addition, stickiness and scum generation in the inner layer due to the transfer of the treatment agent can be suppressed.
When a low-viscosity hydrocarbon-based organic solvent such as mineral oil or ester oil having a viscosity (25 ° C.) of less than 5 mm ² / s is used as the volatile solvent, it may cause a decrease in smoothness and swelling of the yarn. is there. They may also be toxic to the human body. However, the low molecular weight siloxane (B) of the present invention has little odor and high safety to the human body. Further, the smoothness is not lowered and the yarn is not swollen.

  0.001-50 weight% is preferable, as for the weight ratio of the low molecular weight siloxane (B) to the said whole processing agent, 0.01-40 weight% is more preferable, 0.1-20 weight% is further more preferable, 0 .1 to 10% by weight is particularly preferred. If it exceeds 50% by weight, the amount of volatilization is too large, so that the amount of the treatment agent remaining on the yarn decreases, and the performance may not be exhibited.

The siloxane represented by the general formula (1) is a chain-like low molecular weight siloxane. In formula (1), m represents an integer of 1 to 4, and 2 to 4 are preferable from the viewpoint of volatility. When m exceeds 4, sufficient volatility may not be obtained.
The siloxane represented by the general formula (2) is a cyclic low molecular weight siloxane. In general, examples of the cyclic siloxane include cyclic siloxanes D _n having a siloxane bond (SiOR ¹ R ² : R ¹ , R ² represents an organic group) of 3 to 20 (n is an integer indicating the bond amount). However, in the treatment agent of the present invention, cyclic low molecular weight siloxane (D _{3 to} D ₆ ) which is a 3 to 6 mer of dimethylsiloxane (SiO (CH ₃ ) ₂ ) is used. Therefore, in Formula (2), n shows the integer of 3-6. From the viewpoint of volatility, n is preferably 4 to 5.

  As the low molecular weight siloxane (B), when the number of Si in the molecule is the same, the cyclic siloxane represented by the general formula (2) is more volatile than the siloxane represented by the general formula (1). For this reason, the siloxane represented by the general formula (2) is preferable.

The number average molecular weight of the low molecular weight siloxane (B) is preferably 500 or less, more preferably 200 to 400, and even more preferably 200 to 300. When the number average molecular weight exceeds 500, volatility may be reduced.
Viscosity of the low molecular weight siloxane (B) (25 ℃) is preferably 0.5~4.5mm ² / s, more preferably from 1 to 4 mm ² / s, more preferably 2-4 mm ² / s.

[Component (C)]
The treatment agent of the present invention has a viscosity (25 ° C.) of 50 mm ² / s or more and / or an organopolysiloxane because the treatment agent of the present invention facilitates the retention of the treatment agent between yarns after volatilization of the low molecular weight siloxane (B). Or it is preferable to further contain the component (C) which consists of amino-modified silicone.
Moreover, 0.01 to 10 weight% is preferable, as for the weight ratio of the component (C) to the whole processing agent, 0.05 to 8 weight% is more preferable, and 0.1 to 5 weight% is further more preferable.

Examples of the organopolysiloxane having a viscosity (25 ° C.) of 50 mm ² / s or more include polydimethylsiloxane, polymethylphenylsiloxane, and polymethylalkylsiloxane.
Although component organopolysiloxane viscosity (25 ° C.) of (C) is 50 mm ² / s or more, preferably 50~100000mm ² / s, more preferably ^{50~50000mm 2 / s, 50~10000mm 2 /} s is Further preferred is 50 to 5000 mm ² / s.
The number average molecular weight of the organopolysiloxane of the component (C) is preferably 4500 to 100,000, more preferably 5000 to 50000, and further preferably 5500 to 40000.
The organopolysiloxane of component (C) may be an oily ^{one having a} siloxane bond (SiOR ¹ R ² : R ¹ , R ² represents an organic group) bond amount of 60 to 2000, 5000 to It may be 10,000 rubber-like. From the viewpoint of unwinding property, a rubber-like one is preferable, and the amount of the bond is more preferably 5000 to 9000, and further preferably 6000 to 8000.

As the amino-modified silicone having a viscosity (25 ° C.) of 50 mm ² / s or more, an aminoalkyl group-containing organopolysiloxane represented by the following general formula (3) is preferable.
_{^{R 1 (R 2) 2 SiO}} - [(R 2) 2 SiO] k - [(R 2 R 3) SiO] l -SiR 4 (R 2) 2 (3)

In Formula (3), R ¹ represents a group selected from H ₂ N (CH ₂ ) ₃ —, a monovalent hydrocarbon group, and an alkoxy group. R ² is selected from a monovalent hydrocarbon group or an alkoxy group, R ³ is selected from a monovalent hydrocarbon group, H ₂ N (CH ₂ ) ₃ —, and H ₂ N (CH ₂ ) ₂ NH (CH ₂ ) ₃ —. Represents a group. R ⁴ represents a group selected from H ₂ N (CH ₂ ) ₃ —, a monovalent hydrocarbon group, and an alkoxy group. k is a positive number of 5 to 10,000, and l is 0 or a positive number of 0.1 to 400. In formula (3),-[(R ² ) ₂ SiO] _k -and-[(R ² R ³ ) SiO] _l- do not indicate the bonding position relationship between the two groups, but merely both in the molecule. It shows the average number of moles added. Therefore, both groups may be bonded randomly or in a block form. In formula (3), at least one of R ¹ , R ³ and R ⁴ is H ₂ N (CH ₂ ) ₃ — and / or H ₂ N (CH ₂ ) ₂ NH (CH ₂ ) ₃ —. is there. R ¹ is preferably H ₂ N (CH ₂ ) ₃ —, a methyl group, or a methoxy group. R ² is preferably a methyl group or a methoxy group. R ³ is preferably a methyl group, H ₂ N (CH ₂ ) ₃ —, or H ₂ N (CH ₂ ) ₂ NH (CH ₂ ) ₃ —. R ⁴ is preferably H ₂ N (CH ₂ ) ₃ —, a methyl group, or a methoxy group. When the sum of k and l is less than 5, volatility may be a problem. When k exceeds 10,000 and l exceeds 400, the viscosity of the treatment agent increases, which adversely affects smoothness. May have an effect.

Although component viscosity (25 ° C.) of the amino-modified silicone (C) is 50 mm ² / s or more, preferably 50~30000mm ² / s, more preferably ^{100~20000mm 2 / s, 200~10000mm 2 /} s is Further preferred. If the viscosity is less than 50 mm ² / s, the anti-sticking property may not be exhibited.
The amine value of the amino-modified silicone of component (C) is preferably in the range of 0.1 to 200 (KOHmg / g), more preferably 1 to 160 (KOHmg / g), and 1 to 50 (KOHmg). / G) is more preferred. If the amine value is less than 0.1 (KOHmg / g), the effect of anti-wrinkling property, antistatic property, cheese candy shape, smoothness and fluff adsorption may be insufficient, and 200 (KOHmg / g). If it exceeds 1, the solubility in the dispersion medium may deteriorate.
The amino equivalent of the component (C) amino-modified silicone is preferably in the range of 200 to 1,000,000 (g / mol), more preferably 4000 to 100,000 (g / mol), and 400 to 60000 (g / mol). Is more preferable.

[Other ingredients]
The treatment agent for elastic fibers of the present invention may further contain a metal salt of a higher fatty acid (metal soap) in order to enhance the effects of unwinding, smoothness and antistatic properties. The weight ratio of the higher fatty acid metal salt in the elastic fiber treating agent of the present invention is not particularly limited, but is preferably 0.01 to 10% by weight, more preferably 0.2 to 5% by weight, and 5 to 3% by weight is particularly preferred. When the weight ratio of the metal salt of the higher fatty acid is less than 0.01% by weight, the effect due to the addition may not be seen because the amount is too small. On the other hand, if it exceeds 10% by weight, an effect commensurate with the addition of a large amount cannot be obtained, which may be economically disadvantageous.
As the metal salt of higher fatty acid, known ones conventionally used for elastic fibers can be used, and examples thereof include calcium stearate, magnesium stearate, aluminum stearate, barium stearate, zinc stearate and the like. Of these higher fatty acid metal salts, calcium stearate, magnesium stearate and the like are preferred.

  The metal salt of the higher fatty acid can be made into fine particles by a known method such as using a jet mill or a bead mill. Although there is no limitation in particular about an average particle diameter, 0.01-5 micrometers is preferable, 0.02-3 micrometers is more preferable, 0.05-2 micrometers is especially preferable. When the average particle size of the metal salt of the higher fatty acid is less than 0.01 μm, the effect due to the addition may not be observed. On the other hand, if the average particle diameter of the metal salt of higher fatty acid is more than 5 μm, it may easily fall off from the fiber surface and may cause scum in the post-spinning process. In addition, the average particle diameter measured the volume-based average particle diameter, setting the refractive index to 1.02 using the batch cell of the particle size distribution analyzer (LA-910 by Horiba, Ltd.).

  Moreover, the treatment agent for elastic fibers of the present invention may further contain a modified silicone in order to improve antistatic properties and unwinding properties. The modified silicone is generally a reactive (functional) group or a non-reactive group at least at one of both ends, one end, side chain, and both side chains of polysiloxane such as dimethyl silicone (polydimethylsiloxane) ( It has a structure in which at least one functional group is bonded.

  Examples of the modified silicone include alkyl-modified silicones such as modified silicones having long-chain alkyl groups (such as alkyl groups having 6 or more carbon atoms and 2-phenylpropyl groups); ester-modified silicones that are modified silicones having ester bonds; alcohols Carbinol-modified silicone that is a modified silicone having a functional hydroxyl group; Carboxyl-modified silicone that is a modified silicone having an acid anhydride group or carboxyl group; Mercapto-modified silicone that is a modified silicone having a mercapto group; Glycidyl group or alicyclic epoxy group Epoxy-modified silicones such as modified silicones having epoxy groups such as polyoxyalkylene groups (for example, polyoxyethylene groups, polyoxypropylene groups, polyoxyethyleneoxypropylene groups, etc.) It can be given polyether-modified silicone such as sex silicone.

  The polymerization rate of the modified silicone in the entire elastic fiber treatment agent is not particularly limited, but is preferably 0.01 to 10% by weight, more preferably 0.05 to 7% by weight, and 0.1 to 5% by weight. Particularly preferred. If the weight ratio of the modified silicone is less than 0.01% by weight, the effect due to the addition may not be observed because the amount is too small. On the other hand, if it exceeds 10% by weight, the proper performance of the treatment agent may not be obtained.

Moreover, the processing agent for elastic fibers of the present invention may further contain a silicone resin in order to improve antistatic properties and unwinding properties. The silicone resin means a silicone having a three-dimensional crosslinked structure, and may further contain other modified silicones and the like. The silicone resin is generally at least one component selected from a monofunctional constituent unit (M), a bifunctional constituent unit (D), a trifunctional constituent unit (T), and a tetrafunctional constituent unit (Q). It consists of units.
Examples of the silicone resin include silicone resins such as MQ silicone resin, MQT silicone resin, T silicone resin, and DT silicone resin.

As the MQ silicone resin, for example, R ¹ R ² R ³ SiO _1/2 that is a monofunctional structural unit (wherein R ^1, R ^2, and R ³ are all hydrocarbon groups) and tetrafunctional. And a silicone resin containing SiO _4/2 which is a structural unit.
Examples of the MQT silicone resin include R ¹ R ² R ³ SiO _1/2 that is a monofunctional structural unit (where R ¹ , R ^2, and R ³ are all hydrocarbon groups) and tetrafunctional. And a silicone resin containing SiO _4/2 which is a structural unit and RSiO _3/2 which is a trifunctional structural unit (wherein R is a hydrocarbon group).
Examples of the T-silicone resin include a silicone resin containing RSiO _3/2 (where R is a hydrocarbon group) which is a trifunctional structural unit (the terminal of which is a hydrocarbon group, silanol group or alkoxy group). Or the like)).
As the DT silicone resin, for example, R ¹ R ² SiO _2/2 which is a bifunctional structural unit (however, R ¹ and R ² are both hydrocarbon groups) and a trifunctional structural unit. There can be mentioned RSiO _3/2 (where R is a hydrocarbon group).

  The weight ratio of the silicone resin in the entire elastic fiber treatment agent is not particularly limited, but is preferably 0.01 to 10% by weight, more preferably 0.05 to 7% by weight, and 0.1 to 5% by weight. Particularly preferred. If the weight ratio of the silicone resin is less than 0.01% by weight, the effect of addition may not be seen. On the other hand, if it exceeds 10% by weight, an appropriate balance of treatment agent performance may not be maintained.

  The elastic fiber treatment agent of the present invention can further contain components that are usually used in the treatment agent for elastic fibers, such as a binder, an antistatic agent, an antioxidant, and an ultraviolet absorber.

[Treatment agent for elastic fibers]
As a method for producing the treatment agent for elastic fibers of the present invention, a known method can be applied, and the base component (A), the low molecular weight siloxane (B), and the component (C) can be added and mixed in any order as necessary. . You may use low molecular weight siloxane (B) in the state contained in the other silicone component. For example, the low molecular weight siloxane (B) can be used in a state of being contained in the base component (A) silicone oil, the component (C) organopolysiloxane, the amino-modified silicone, or the modified silicone as the other component.

The viscosity of the elastic fiber-processing agent of the present invention (25 ° C.) is preferably from 3 to 20 mm ² / s, more preferably ^{5~20mm 2 / s, 8~15mm 2 /} s is particularly preferred. If it is less than 3 mm ² / s, volatilization of the treatment agent for elastic fibers may become a problem, and if it exceeds 20 mm ² / s, the elastic fibers may be taken by a roller and thread cutting may occur.

[Elastic fiber]
The elastic fiber of the present invention is an elastic fiber in which the elastic fiber treating agent is added to the entire elastic fiber in an amount of 0.1 to 15% by weight, preferably 1 to 10% by weight. If it is less than 0.1% by weight, the effect of the present invention is not sufficient, and if it exceeds 15% by weight, it is uneconomical. A known method can be adopted as the providing method.

  The elastic fiber (elastic fiber body) of the present invention is a fiber having elasticity using polyether polyurethane, polyester polyurethane, polyether ester elastomer, polyester elastomer, polyethylene elastomer, polyamide elastomer, etc., and its elongation is Usually 300% or more. Polyolefin elastic fibers having soft stretch properties and polytrimethylene terephthalate fibers may also be included.

  As the elastic fiber of the present invention, for example, polyurethane urea elastic fiber is prepared by preparing polytetramethylene glycol (PTMG) having a molecular weight of 1000 to 3000 and diphenylmethane diisocyanate (MDI), and PTMG / MDI = 1/2 to 1/1. 20 (molar ratio) of a polyurethane urea polymer obtained by reacting in a solvent such as dimethylacetamide or dimethylformamide and reacting with 80 to 100% of excess isocyanate with a diamine such as ethylenediamine or propanediamine to extend the chain. A polyurethane urea elastic fiber that can be produced by spinning a ~ 40% solution by dry spinning at a spinning speed of 400 to 800 m / min is preferred.

The treatment agent of the present invention is preferably used for fibers having an elastic fiber fineness of 5 to 40 dtex.
As an application of the elastic fiber of the present invention, it can be used as a fabric by processing yarn such as covering yarn such as CSY, single covering, PLY and air covering, circular knitting, tricot and the like. In addition, using these processed yarns and fabrics, products that require elasticity such as stockings, socks, underwear and swimwear, and outerwear such as jeans and suits are given elasticity for comfort. Also used for purposes. More recently, it has been applied to disposable diapers.
The treatment agent of the present invention is usually applied in an amount of 0.1 to 15% by weight with respect to the elastic fiber. If it is less than 0.1% by weight, the effect of the present invention is not sufficient, and if it exceeds 15% by weight, it is uneconomical.

  The low molecular weight siloxane (B) used in the treatment agent of the present invention can be used as a treatment agent for fibers other than elastic fibers in order to provide the same effects as those of the present invention. In particular, fiber treatment agents containing silicone components such as the above-described silicone oil, amino-modified silicone, and modified silicone (for example, acrylic fiber oil agent for carbon fiber production such as WO 2007/066517, JP 2007-247128 A, etc. Can be used in the state in which the low molecular weight siloxane (B) is contained in these silicone-based components.

  Non-elastic fibers include nylon 6, nylon 66, polyethylene, polypropylene, polymethylene terephthalate, polyethylene terephthalate, polybutylene terephthalate, rayon, polynosic, lyocell, cupra, vinylon, acrylic, diacetate, triacetate, carbon fiber precursor, etc. And various synthetic fibers.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples described herein. The percent (%) and part shown in the following examples indicate “% by weight” and “part by weight” unless otherwise specified. Each characteristic in the examples was evaluated according to the following method. In addition, Example 5 and Example 13 are taken as reference examples.

[Method for evaluating treatment agent]
(viscosity)
Using a Canon Fenceke viscometer, the kinematic viscosity of the sample solution at 25 ° C. was determined.
(Viscosity after 7 days)
1 g of the treatment agent was put in a watch glass having a diameter of 10 cm, placed in a 40 ° C. gear oven, and the viscosity after one week was measured.

(Amine number)
A sample dissolved in a solvent such as isopropyl alcohol or xylene / isopropyl alcohol (1/1) is mixed with 0.1N-HCl ethylene glycol / isopropyl alcohol solution using an automatic potentiometric titrator (COM-900 manufactured by Hiranuma). Potentiometric titration was performed to measure the end point titer (ml), and the amine value was calculated from the following formula a. The amine value is expressed in mg of KOH equivalent to HCl required to neutralize 1 g of the sample.
Amine value (KOHmg / g) = (A × F × 5.61) / W (Formula a)
(In formula a, A = titer (ml), F = 0.1 N HCl titer, W = sample weight (g))

(Roller static electricity)
In FIG. 1, the fiber cheese (1) to which the treatment agent is applied is set on the unwinding side of the unwinding speed ratio measuring machine, rotated at a peripheral speed of 50 m / min, and at 2 cm above the cheese, the Kasuga potential difference With the measuring device (2), the generated static electricity 1 hour after the start of rotation is measured.
(Knitting tension)
In FIG. 2, the elastic yarn (4) vertically taken from the cheese (3) is passed through the compensator (5), the roller (6), and the roller (9) attached to the U gauge (8) via the knitting needle (7). ) And connected to the speedometer (10) and the take-up roller (11). The rotational speed of the take-up roller is adjusted so that the traveling speed of the speedometer (10) becomes a constant speed (for example, 10 m / min, 100 m / min), and the knitting tension at that time is taken up by the take-up roller. Is measured with a U gauge (8), and the friction (g) between the fibers / knitting needles is measured. The generated static electricity is measured with a Kasuga-type potentiometer (12) at a distance of 1 cm from the running yarn.

(Friction coefficient between fibers (F / FμS))
In FIG. 3, a monofilament of elastic fiber to which a treatment agent has been applied is taken about 50 to 60 cm, a load T1 (13) is suspended at one end, and the other is attached to the U gauge (15) via a roller (14). The ends are pulled at a constant speed (eg, 3 cm / min), the secondary tension T2 at that time is measured with a U gauge (15), and the inter-fiber friction coefficient is obtained by the following equation b.
Friction coefficient (F / FμS) = 1 / θ · ln (T2 / T1) (Formula b)
(In formula b, θ = 2π, ln = natural logarithm, T1 is 1 g per 22 dtex)

(Unwinding speed ratio)
In FIG. 4, the fiber cheese (16) to which the treatment agent is applied is set on the unwinding side of the unwinding speed ratio measuring machine, and the paper tube (17) is set on the winding side. After setting the winding speed to a constant speed, the rollers (18) and (19) are activated simultaneously. In this state, there is almost no tension on the yarn (20), so the yarn is stuck on the cheese and does not leave, so the unwinding point (21) is in the state shown in FIG. By changing the unwinding speed, the unwinding point (21) of the yarn (20) from the cheese is changed. The unraveling speed ratio is obtained by the following equation c. The smaller this value is, the better the unpacking property is.
Unwinding speed ratio (%) = (Winding speed−Unwinding speed) ÷ Unwinding speed × 100 (Formula c)

(Adjustment of spinning dope)
A polytetramethylene ether glycol having a number average molecular weight of 2000 and 4,4′-diphenylmethane diisocyanate were reacted at a molar ratio of 1: 2, and then chain-extended using a 1,2-diaminopropane solution in dimethylformamide, with a polymer concentration of 27%. Of dimethylformamide was obtained. The viscosity at 30 ° C. was 1500 mPaS.

(Examples 1-13, 15-17 and Comparative Examples 1-3)
The treating agent (the blending amount in the table is part by weight) was prepared by mixing the components described in Table 1 and Table 2 in an arbitrary order. Further, the treatment agent containing magnesium stearate was prepared by mixing all components of the treatment agent and then dispersing the mixture until the average particle size became 3 μm using a bead mill.
Next, the polyurethane spinning dope was discharged into a N ₂ stream at 210 ° C. to dry-spin. After applying 6% by weight of the treatment agent prepared on the running yarn during spinning to the fiber, it was wound on a bobbin at a speed of 500 m / min to obtain 44 dtex / 4f cheese (400 g of winding amount). The obtained cheese was left for 48 hours in an atmosphere of 35 ° C. and 50% RH for evaluation. These results are shown in Tables 1 and 2.

(Example 14)
Amino-modified silicone KF-880 (manufactured by Shin-Etsu Chemical Co., Ltd., amino equivalent 1800 g / mol, amine value 30 KOH mg / g, containing 5% by weight of D4) was heated at 80 ° C. for 3 hours with stirring under reduced pressure of 1.3 kPa. In the same manner as in the above example, except that the content of D4 was 0.01% by weight or less (KF-880M) was used. The results are shown in Table 2.

Various physical properties of the components described in the table are shown below.
1) Base component (A)
Dimethyl silicone (15 mm ² / s): Average molecular weight 2000.
Dimethyl silicone (20 mm ² / s): average molecular weight 2500.
Liquid paraffin: mineral oil, 12.8 mm ² / s.
Isooctyl laurate: ester oil, 7.3 mm ² / s.
2) Low molecular weight siloxane (B)
D4: Cyclic siloxane tetramer, 2.4 mm ² / s.
D5: Cyclic siloxane pentamer, 4.0 mm ² / s.
D6: Cyclic siloxane hexamer, 2.5 mm ² / s.
3) Component (C)
Amino-modified silicone KF-861: 3500 mm ² / s, amino equivalent 2000 g / mol, amine value 28 KOH mg / g, 1% by weight of D4, manufactured by Shin-Etsu Chemical Co., Ltd.
Amino-modified silicone KF-880: 650 mm ² / s, amino equivalent 1800 g / mol, amine value 30 KOH mg / g, containing 5% by weight of D4, manufactured by Shin-Etsu Chemical Co., Ltd.
Amino-modified silicone KF-880M: 700 mm ² / s, D4 reduced product of KF-880.
Polydimethylsiloxane: dimethyl silicone, 3000 mm ² / s, average molecular weight 40
000, manufactured by Shin-Etsu Chemical Co., Ltd.
Amino silicone raw rubber: 40000mm ² / s, 20% solution of dimethyl silicone 20 mm ² / s.
4) Other components Magnesium stearate: 99%, 200-mesh product.

DESCRIPTION OF SYMBOLS 1 Cheese of elastic fiber 2 Kasuga type potential difference measuring device 3 Cheese of elastic fiber 4 Yarn 5 Compensation sweater 6 Roller 7 Knitting needle 8 U gauge 9 Roller 10 Speedometer 11 Winding roller 12 Kasuga type potentiometer 13 Load 14 Roller 15 U gauge 16 Cheese 17 Winding paper tube 18 Roller 19 Roller 20 Traveling yarn 21 Unwinding point 22 Contact point of cheese and roller

Claims (7)

A processing agent for elastic fibers used when producing elastic fibers,
Containing at least one base component (A) selected from silicone oil, mineral oil and ester oil, and further containing a low molecular weight siloxane (B) comprising a siloxane represented by the following general formula (2),
The processing agent for elastic fibers whose weight ratio of the said base component (A) to the said whole processing agent is 40-99.99 weight%.

(In formula (2), n represents an integer of 3 to 5.)   The proportion of the silicone oil in the whole base component is 50% by weight or more, the proportion of the mineral oil is 50% by weight or less, and the proportion of the ester oil is 50% by weight or less. Treatment agent for elastic fibers. The viscosity of the silicone oil (25 ° C.) of less than ^{5 mm} 2 / s or more 50 mm ² / s, the viscosity of the mineral oil (25 ° C.) is 5 to 50 mm ² / s, a viscosity (25 ° C. of the ester oil ) Is a processing agent for elastic fibers according to claim 1 or 2 , wherein ⁵ ) to 50 mm2 / s. The viscosity of the low molecular weight siloxane (B) (25 ℃) is 0.5~4.5mm ² / s, the elastic fiber-processing agent according to any one of claims 1-3. The processing agent for elastic fibers according to any one of claims 1 to 4 , wherein a weight ratio of the low molecular weight siloxane (B) in the entire processing agent is 0.001 to 50% by weight. It further contains a component (C) composed of an organopolysiloxane and / or amino-modified silicone having a viscosity (25 ° C.) of 50 mm ² / s or more, and the weight ratio of the component (C) in the entire treatment agent is 0.00. The processing agent for elastic fibers according to any one of claims 1 to 5 , which is from 01 to 10% by weight. An elastic fiber, wherein the elastic fiber main body is provided with 0.1 to 15% by weight of the elastic fiber treatment agent according to any one of claims 1 to 6 .

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