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Method for regenerating dry-spinning waste polyurethane filament into polyurethane spinning stock solution with chlorine resistance

A spandex waste silk and spandex spinning technology, which is applied in the field of spandex spinning, can solve the problems of small amount of additives, lack of chlorine resistance of stock solution, and limited use range, etc., achieve good stability and uniformity, and improve product quality , The effect of broadening the scope of use

Active Publication Date: 2010-12-22
JIANGSU SHUANGLIANG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in viscosity of spandex waste silk and the very small amount of additives added, it is difficult to mix the added additives and spandex waste silk evenly, which directly affects the stability and uniformity of the spinning stock solution obtained from spandex waste silk , which indirectly affects the spinnability of the stock solution, which in turn affects the quality of the regenerated silk; in addition, the stock solution obtained from it lacks chlorine resistance, especially the finished swimwear is easily corroded by active chlorine and will lose its strength and elasticity. Relatively limited its scope of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Ingredients

[0025] 1. Prepare the reaction control agent: first, add the monoamine and the diamine into the container according to the molar ratio of 8:1, then add the organic solvent dimethylacetamide, and prepare a solution with a mass percentage of 5.1%;

[0026] 2. Deploying reaction aids: first grind the reaction aids, then use dimethylacetamide to mix the mixture of anti-aging agent Ciba 245 and Ciba 622 (Ciba245: Ciba 622=1: 3 mass ratio), the anti-yellowing agent SAS and the chlorine-resistant additive ZnO are all formulated into a 32% solution, and the lubricant magnesium stearate is formulated into a solution with a mass percentage of 8.5%.

[0027] Two, production

[0028] Step 1. At -30°C to -40°C, using the weak elasticity and brittleness of spandex yarn, crush spandex waste silk into short fibers;

[0029] Step 2. Wash with water and detergent at 40°C to 100°C for 10 to 90 minutes, wash off the oil and other impurities on the surface of the spandex ...

Embodiment 2

[0034] The difference between the present invention and embodiment 1 is:

[0035] First add 25.0Kg of DMAC to impregnate the reactor, put the degreased and dried spandex waste into the reactor, then add 22.10Kg of DMAC; in the reaction control agent, the molar ratio of monoamine and diamine is 6:1, The addition amount is 1.0Kg; the anti-aging agent is a mixture of Ciba 1790 and Ciba 622 (Ciba 1790: Ciba 622=1:3 mass ratio), the addition amount is 0.16Kg; the addition amount of anti-yellow agent SAS is 0.01Kg; chlorine-resistant additive The addition amount of ZnO / DESn (ZnO:DESn=4:1) is 1.5Kg; the addition amount of lubricant magnesium stearate is 0.9Kg.

Embodiment 3

[0037] The difference between the present invention and embodiment 1 is:

[0038] The organic solvent used is DMF, first add 50.0Kg DMF to impregnate the reactor, put the degreased and dried spandex waste silk into the reactor, and then add 20.5Kg DMF; in the reaction control agent, the moles of monoamine and diamine The ratio is 5:1, and the addition amount is 1.5Kg; the anti-aging agent is a mixture of Ciba 245 and Ciba622, and the addition amount is 0.01Kg; the anti-yellowing agent Ciba HN-150, the addition amount is 0.32Kg; the chlorine resistance additive ZnO addition amount is 2.0Kg; the added amount of lubricant magnesium stearate is 1.47Kg.

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Abstract

The invention relates to a method for regenerating dry-spinning waste polyurethane filament into polyurethane spinning stock solution with chlorine resistance, comprising the following technical process: at the temperature of 30 DEG C below zero to 40 DEG C below zero, smashing waste polyurethane filament into short fibre; washing by water and detergent and drying; adding organic solvent accounting for 50-200 wt% of waste polyurethane filament; then adding waste polyurethane filament; finally, adding organic solvent accounting for 46.4-284 wt% of waste polyurethane filament; under the protection of N2, stirring and reacting for 2-4 hours at the reaction temperature of 50-100 DEG C; spraying reaction control agent blended by organic solvent; adding reaction auxiliary agent blended by the organic solvent; stirring for 20-120 minutes; and after curing, obtaining spinning stock solution with proper viscosity. The polyurethane spinning stock solution produced by the method of the invention has good stability, evenness and spinnability and has obvious effect of good chlorine resistance of the product.

Description

(1) Technical field [0001] The invention relates to a method for regenerating dry-spun spandex waste silk into spandex spinning stock solution containing chlorine resistance. The invention belongs to the technical field of spandex spinning. (2) Background technology [0002] Patent No. ZL200710015256.X, titled "A method for regenerating dry-process spandex waste into normal spandex" discloses a method for reusing dry-process spandex waste to solve environmental pollution caused by spandex waste and improve spandex input-output ratio. In the method, the spandex waste silk is pulverized at low temperature, washed with water and detergent, dried, put into a reactor together with an organic solvent and an auxiliary agent, and reacted at 45 DEG C to 100 DEG C for 6 to 12 hours to obtain a spinning stock solution. This patented method can regenerate dry-spun spandex waste into spandex yarn, and the whole operation procedure is simple. However, due to the large difference in vis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10D01F13/04D01D1/02
CPCY02P70/62
Inventor 张磊李广忠何春远沙季红周志能
Owner JIANGSU SHUANGLIANG SPANDEX
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