Method for regenerating normalization spandex fibre from dry spinning spandex waste silk

A technology of spandex waste and spandex yarn is applied in the field of spandex yarn, which can solve the problems of inability to complete the regeneration of dry-spun spandex waste yarn, unable to remanufacture spandex yarn, etc., and achieves the effects of less investment, great economic benefit, and simple operation process.

Active Publication Date: 2008-01-02
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned relevant existing patented technologies can only reuse melt-spinning spandex waste, but cannot complete the regeneration of dry-spinning spandex waste, and can only be used to press into films, but cannot re-produce normal spandex

Method used

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  • Method for regenerating normalization spandex fibre from dry spinning spandex waste silk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The present invention regenerates dry-spinning spandex waste into normal spandex, comprising the following steps:

[0022] (1) Use a low-temperature pulverizer below -30°C to change spandex waste from filaments to short fibers;

[0023] (2) Remove the oil on the surface of the spandex waste silk with water and detergent;

[0024] (3), remove the moisture on the spandex waste silk with drying method;

[0025] (4), put the spandex waste silk after degreasing and drying into the reactor, and add organic solvent dimethylacetamide (DMAC), reaction terminator, anti-aging agent, fiber forming agent, spandex waste silk and organic The mass ratio of the solvent is 1:1, according to the mass percentage of spandex waste silk, the reaction termination dose is 0.01%, the antiaging agent is 0.2%, and the fiber forming agent is 0.2%. Stir at 45°C-100°C for 6-12 hours to obtain a suitable Viscosity spinning dope;

[0026] (5) Remove the air bubbles in the spinning dope;

[0027] (6...

Embodiment 2

[0029] The difference between a method of regenerating dry-spinning spandex waste silk into normal spandex silk and embodiment 1 of the present invention is:

[0030] The organic solvent is dimethylformamide (DMF), and the mass ratio of spandex waste silk to organic solvent is 1:2. According to the mass percentage of spandex waste silk, the reaction terminator is 0.5%, the antiaging agent is 0.01%, and the fiber forming agent 0.3%.

Embodiment 3

[0032] The difference between a method of regenerating dry-spinning spandex waste silk into normal spandex silk and embodiment 1 of the present invention is:

[0033] Organic solvent is dimethylformamide (DMF), spandex waste silk and organic solvent mass ratio are 1: 3, according to the mass percentage of spandex waste silk, reaction terminator is 0.2%, anti-aging agent 0.3%, fiber forming agent 0.01%.

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PUM

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Abstract

The invention discloses a method to regenerate dry-spun spandex waste silk to normal spandex silk in spandex silk preparing technique domain, which comprises the following steps: (1)adopting cryogenic breaking technology; changing the long fiber to short fiber; (2)removing oil solution on the surface of the spandex waste silk with water and detergent; (3)drying the water on the spandex waste silk; (4)adding into spandex waste silk, organic solvent and aids into reactor; reacting for 6-12 h at 45-100 deg. c; getting spinning raw liquid with proper viscosity; (5)removing bubble; spinning; oiling; modeling; getting spandex silk. This invention possesses simple operating course and little investment, which can get bigger economical benefit.

Description

1. Technical field: [0001] The invention relates to a method for regenerating waste dry-spun spandex yarns into normal spandex yarns, and belongs to the technical field of spandex yarns. 2. Background technology [0002] Patent No. 200410054329.2, patent name "A Method for Reusing Melt-spinning Spandex Waste" discloses a method for reusing melt-spinning spandex waste to solve the problem of serious environmental pollution caused by waste silk produced during the production process. In this method, melt-spinning spandex waste silk is added with a high boiling point reagent, and then a compound with active hydrogen is added to react in an inert atmosphere to obtain a yellow viscous liquid; then the liquefied melt-spinning spandex waste silk raw material is mixed with polyether Diols or polyols are mixed and reacted with diisocyanates to regenerate polyurethane elastomers. [0003] The above-mentioned relevant existing patented technologies can only reuse melt-spinning spandex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/70D01F13/04D01D5/04
CPCY02P70/62
Inventor 王典新林鹏凌常勇宋理正
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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