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Preparation method of chlorine-resistant black polyurethane urea elastic fiber

A polyurethane urea and elastic fiber technology, applied in the field of chlorine-resistant black polyurethane urea elastic fiber, can solve the problems of low cleaning fastness, poor color fastness of dark color, dyeing, etc., and achieves strength retention rate and elastic recovery Excellent strength, excellent strength retention, excellent elastic recovery rate

Active Publication Date: 2022-01-11
TAEKWANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the polyurethane urea elastic yarn is dyed black with disperse dyes or acid dyes, there is a problem of uneven dyeing, especially when washing, there is a problem of low washing fastness due to fading
That is, in the case of dyeing with these disperse dyes or acid dyes (black) after preparing a braided fabric using ordinary polyurethane urea elastic yarn and polyester or polyamide yarn, there is dark color and / or color fastness. The problem of poor degree
[0004] In order to solve these problems, Korean Patent Publication No. 10-646648 discloses a method in which carbon black (Carbon black) is added to polymerize during polymerization to prepare black elastic fibers. However, black is still used and dyed on it. In the case of dyeing, there is still a problem of dyeing, and because the spinnability is poor due to the addition of carbon black, there are problems such as poor productivity of the fiber and occurrence of cutting when spinning.
[0005] In addition, in the case of the conventional black elastic fiber, it is difficult to use it in places exposed to chlorine such as swimwear because of its poor chlorine resistance.

Method used

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  • Preparation method of chlorine-resistant black polyurethane urea elastic fiber
  • Preparation method of chlorine-resistant black polyurethane urea elastic fiber
  • Preparation method of chlorine-resistant black polyurethane urea elastic fiber

Examples

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preparation example Construction

[0021] One embodiment of the present invention is a preparation method of chlorine-resistant black polyurethane urea elastic fiber, the above-mentioned chlorine-resistant black polyurethane urea elastic fiber contains carbon black, and the preparation method of chlorine-resistant black polyurethane urea elastic fiber comprises: preparing polyurethane urea polymer The step of: mixing the slurry composition comprising the anti-chlorine agent, carbon black and polyurethane prepolymer with unreacted terminal isocyanate groups in the above polyurethane urea polymer to prepare the spinning stock solution; and using the above spinning stock solution to carry out The steps of spinning.

[0022] In one embodiment of the present invention, the polyurethane prepolymer may include 2.4 mol % to 3.5 mol % of unreacted terminal isocyanate groups. In one embodiment of the present invention, the above-mentioned polyurethane urea polymer can be prepared by the following steps: adding polytetram...

Embodiment 1

[0101] 1) Use a quantitative pump to continuously transfer 155.43 g / min of polytetramethylene ether glycol (molecular weight: 1800) and 36.71 g / min of diphenylmethane-4,4 to a 40° C. uniform mixer (Static Mixer). '-diisocyanate and mixed, put into a continuous polymerization tube in the form of a cylindrical tube at 80°C, and reacted for 135 minutes. By adjusting the reaction, the unreacted diisocyanate at the end was 2.64±0.02 mole percent, and synthesized as the first polymerization Polyurethane prepolymers.

[0102] Cool the above-mentioned first polymer to 40°C and stabilize it for 24 hours. Before putting it into the second reactor, put it into the high-end mixer continuously with 309.93 g / min of N,N-dimethylacetamide at 3500 rpm Stir vigorously for 20 seconds. The above-mentioned primary polymer was completely dissolved, and a 40°C polyurethane polymer solution having a solids content of 38.27% by weight was prepared by cooling.

[0103] 2) Prepared 4.955kg of ethylene...

Embodiment 2

[0110] In Example 1, except that the reaction was adjusted so that the unreacted diisocyanate at the end was 2.24±0.02 mole percent to prepare the polyurethane prepolymer as the first polymer, it was carried out in the same manner.

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Abstract

The present invention provides a chlorine-resistant black polyurethaneurea elastic yarn having chlorine resistance and black color while being excellent in spinning characteristics without cutting off, and a preparation method thereof.

Description

technical field [0001] The present invention relates to a method for preparing a black polyurethane urea (Polyurethaneurea) elastic fiber with excellent form properties and significantly improved dyeability, and a chlorine-resistant black polyurethane urea elastic fiber prepared therefrom. Background technique [0002] Polyurethane urea elastic fiber is a polymer obtained by using diamine to extend the chain of isocyanate-terminated prepolymer (Prepolymer) synthesized from high molecular weight polyol (Polyol) and excessive organic diisocyanate (Diisocyanate). It is mainly prepared by dry and melt spinning and woven with polyamide (Polyamide) fiber or polyester (polyester) fiber and natural fiber, so that it can be used as an elastic functional material in tights, socks, pantyhose, swimsuits, etc. field of clothing. [0003] However, when the polyurethaneurea elastic yarn is dyed black with disperse dyes or acid dyes, there is a problem of uneven dyeing, especially when was...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F1/10D01F1/04D01D1/02
CPCD01F1/06D01F1/10D01F6/70D01F6/72D02G3/32
Inventor 权容秀金泰成韩荣均都炫在金海东洪景坤
Owner TAEKWANG IND CO LTD