JP2003113581A - Elastic fiber-treating agent and elastic fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treating agent excellent in smooth property and antistatic property as an elastic fiber-treating agent by using a specific silicone resin. SOLUTION: This elastic fiber-treating agent is obtained by blending 0.1-15 wt.% silicone resin having R1 R2 SiO or R3 SiO3/2 of which R1 , R2 , R3 are each a 2-10C hydrocarbon group or phenyl group, and of which base component is selected from a silicone oil, a mineral oil and an ester oil, and using at least >=5 wt.% mineral oil or ester oil. The elastic fiber is provided by imparting 0.1-15 wt.% treating agent on it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment agent for elastic fibers which is excellent in antistatic property and smoothness.

[0002]

2. Description of the Related Art JP-B-42-8438 describes a treatment agent for elastic fibers containing an amylsiloxane resin and dimethyl silicone. Japanese Patent Laid-Open No. 57-617
Japanese Patent Publication No. 76 describes a yarn finishing composition comprising a silicone resin and dimethylsiloxane. JP-A-9-
No. 188974 discloses an oil agent for elastic fibers using a silicone resin having an MQ ratio of 0.4 to 1.5.

[0003]

Since the treatment agent for elastic fibers uses a hydrophobic base component such as silicone oil, mineral oil and ester oil, it is necessary to impart antistatic property to the treatment agent.
A component having strong polarity cannot be dissolved, and only a slight antistatic property is imparted by using a modified silicone having a small modification rate. In addition, as for the smoothness, at present, almost no component for improving the smoothness is found.

[0004]

Treatment agent of the present invention SUMMARY OF THE INVENTION, the base component is a silicone oil, mineral oil, selected from ester oils, using at least a mineral oil or ester oil 5 wt% or more, R _1, R R ₁ R ₂ SiO or R ₃ S in which ₂ , R ₃ is a hydrocarbon group having 2 to 10 carbon atoms or a phenyl group
0.1% silicone resin based on iO _3/2
It is a treating agent for elastic fibers which is blended up to 15% by weight. Also,
The present invention is an elastic fiber to which the above-mentioned treating agent is added in an amount of 0.1 to 15% by weight.

[0005] In treating agent less than ^{3 mm} 2 / s viscosity is usually 3 to 30 mm ² / s at 30 ° C. of the present invention, the volatile treatment agent is a problem, inferior in smoothness exceeds 30 mm ² / s.

In the present invention, the base component is silicone oil,
It is selected from mineral oil and ester oil, and it is necessary to use at least 5% by weight or more of mineral oil or ester oil. If 100% of silicone oil is used as a base component, the antistatic property of the silicone resin blended in the present invention will not be exhibited.
Preferably, when mineral oil or ester oil is used in an amount of 30% by weight or more, more preferably 50% by weight or more, the effect of improving antistatic property / smoothness is great. In the present invention, R ₁ , R ₂ , and R ₃ are hydrocarbon groups having 2 to 10 carbon atoms or phenyl groups.
A silicone resin having ₁ R ₂ SiO or R ₃ SiO _3/2 as a basic unit is used. R is propyl, butyl, isopentyl, hexyl, pentyl, octyl,
Benzyl, phenyl, etc. are used. The silicone resin may be copolymerized with a basic unit of R ₃ SiO _1/2 , SiO ₂ if necessary.

The treating agent of the present invention contains a metal soap of higher fatty acid of 0.01 to 0.01 in order to enhance the smoothness and antistatic effect.
5 parts by weight may be added. As the metal soap of higher fatty acid, known soaps used for conventional elastic fibers can be used, and Ca stearate, zinc stearate, Mg stearate, Al stearate, Ba stearate and the like are preferable. Further, the treatment agent of the present invention includes conventionally known modified silicone (alkyl modified silicone, ester modified silicone, polyether modified silicone, amino modified silicone, carbinol modified silicone, carboxy modified silicone, mercapto modified silicone, phosphoric acid modified silicone, Epoxy-modified silicone, MQ silicone resin, MQT silicone resin, T silicone resin, etc.), binders, antistatic agents, antioxidants, UV absorbers, and other components that are commonly used in elastic fiber treatment agents can be added. .

The treating agent of the present invention is usually applied in an amount of 0.1 to 15% by weight based on the elastic fiber.

[0009]

The present invention will be described in detail with reference to the following examples. In addition, in each of the specific examples, the evaluation of each oil agent property was performed according to the following methods.

Unwinding speed ratio: In FIG. 1, a fiber cheese (1) to which a treating agent is applied is set on the unwinding side of the unwinding speed ratio measuring machine, and a paper tube (2) on the winding side is set. After setting the winding speed to a constant speed, the rollers (3) and (4) are simultaneously activated. In this state, the yarn (5) has almost no tension, and the yarn sticks on the cheese and does not separate, so the unwinding point (6) is in the state shown in FIG. By changing the unwinding speed, the unwinding point (6) of the thread (5) from the cheese changes, so the unwinding speed is set so that this point coincides with the contact point (7) between the cheese and the roller.
The unwinding speed ratio is calculated by Equation 1. The smaller this value is, the better the unwinding property is. Unwinding speed ratio (%) = (Winding speed ratio-Unwinding speed) / Unwinding speed X100 (Formula 1) Knitting tension: In Fig. 2, the elastic yarn (9) vertically taken from the cheese (8) is used as a compensator. U gauge (1) through roller (11) and knitting needle (12) through (10).
3) via the roller (14) attached to the speedometer (15),
Connect to take-up roller (16). Speedometer (15)
Driving speed is constant (eg 10m / min, 100m /
Adjust the rotation speed of the take-up roller so that it will be equal to 1 minute), take up the take-up roller, measure the knitting tension at that time with a U gauge (13), and measure the friction (g) between the fiber and the knitting needle. To do. The static electricity generated is measured with a Kasuga type potentiometer (17) at a distance of 1 cm from the running yarn. Roller static electricity: Set cheese on the unwinding side of the unwinding speed ratio measuring machine, rotate it at a peripheral speed of 50 m / min, and put it on the cheese 2c
At m, measure the static electricity generated one hour after starting rotation with the Kasuga type potentiometer

Examples 1 to 8 Preparation of spinning dope: 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 1,2-diaminopropane dimethyl was reacted. Chain extension was performed using a formamide solution to obtain a dimethylformamide solution having a polymer concentration of 27%. The concentration at 30 ℃ is 1500mP
was aS. Polyurethane spinning solution is N ₂ at 190 ℃
It was discharged into an air stream and dried. After the treatment agent shown in Table 1 (the compounding amount in the table is a weight part) was applied to the running yarn during spinning in an amount of 6% by weight with respect to the fiber with an oiling roller, 5 minutes per minute
It was wound around a bobbin at a speed of 00 m to obtain 77 dtex monofilament cheese (roll amount 400 g). The obtained cheese was left for 48 hours in an atmosphere of 35 ° C. and 50% RH for evaluation.

[0012]

[Table 1]

Examples 9 to 13 and Comparative Examples 1 to 4 Preparation of spinning dope 100 parts by weight of polytetramethylene glycol having a number average molecular weight of 2000 and 25 parts by weight of 4,4'-diphenylmethane diisocyanate were reacted at 70 ° C. to give N, 250 parts by weight of N'-dimethylacetamide was added and the reaction mixture was dissolved while cooling. A solution prepared by dissolving 5 parts by weight of 1,2-diaminopropane in 184 parts by weight of N, N'-dimethylacetamide was added, and dimethyl silicone 10000 was added.
0.2 wt% of mm ² / s was added. The polyurethane spinning dope thus obtained was discharged from a spinneret having four pores into a N ₂ stream at 180 ° C. for dry spinning.
After the treatment agent shown in Table 4 was applied to the running yarn during spinning by an oiling roller in an amount of 6% by weight based on the fiber, the amount was 500 per minute.
It was wound on a bobbin at a speed of m to obtain 44 dtex multifilament cheese (roll amount 400 g). The obtained cheese was left for 48 hours in an atmosphere of 35 ° C. and 50% RH for evaluation.

[0014]

[Table 2]

[0015]

EFFECTS OF THE INVENTION By using the treating agent of the present invention, it is possible to impart stable unwinding property and antistatic property to the elastic fiber.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating a method for measuring an unwinding speed ratio.

FIG. 2 is a schematic diagram illustrating a method for measuring knitting tension.

[Explanation of symbols]

1 cheese 2 Winding paper tube 3 rollers 4 rollers 5 Running yarn 6 Unwinding point 7 Cheese and roller contact 8 cheese 9 Running yarn 10 compensator 11 roller 12 knitting needles 13 U gauge 14 roller 15 Speedometer 16 Take-up roller 17 Kasuga type potentiometer

Claims (3)

[Claims] 1. A base component is selected from silicone oil, mineral oil and ester oil, at least 5% by weight of mineral oil or ester oil is used, and R ₁ , R ₂ and R ₃ have 2 carbon atoms.
R ₁ R ₂ S which is a hydrocarbon group of 10 to 10 or a phenyl group
A treatment agent for elastic fibers, containing 0.1 to 15% by weight of a silicone resin having iO or R ₃ SiO _3/2 as a basic unit. 2. The treatment agent for elastic fibers according to claim 1, wherein 30% by weight or more of mineral oil or ester oil is used as a base component. 3. An elastic fiber containing 0.1 to 15% by weight of the treating agent according to claim 1.