Method for recycling cotton-containing components in waste cotton-polyester blended fabrics

A polyester-cotton blending and recycling method technology, applied in the textile field, can solve the problems of pollution, cotton fiber damage, inconvenient recycling, etc., and achieve the effects of reducing pollution, increasing recycling value, and improving recycling rate.

Inactive Publication Date: 2013-01-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because this method uses a large amount of alkaline solution, it will damage the cotton fiber to a certain extent, and the dissolved solution is not easy to recycle, which will cause great pollution to the environment and will also affect the performance of recycled fibers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Soak 100g of waste polyester-cotton blended fabric with a water content of 8% and a cotton content of 10% in 989.99g of NMMO solution containing 0.01g of gallic acid monohydrate and a water content of 13.3% by weight. Swell for 30 minutes, then heat up to 95°C, stir for 5 minutes, stop stirring, and keep at this temperature for 1.5 hours to dissolve the cotton cellulose of the waste polyester-cotton blended fabric with the NMMO aqueous solution, and then use vacuum filtration to separate the polyester fiber in the solution That is, a cellulose-containing solution is obtained.

Embodiment 2

[0022] Soak 350g of waste polyester-cotton blended fabric with a water content of 4% and a cotton content of 35% in 1918g of NMMO solution containing 0.9g of propyl gallate and a water content of 13.3% by weight, and first swell at 85°C for 20min , then raise the temperature to 100°C, stir for 15 minutes, stop stirring, and keep at this temperature for 2 hours, so that the NMMO aqueous solution dissolves the cotton cellulose of the waste polyester-cotton blended fabric, and then uses high-speed centrifugation to separate the polyester fiber in the solution to obtain fiber-containing prime solution.

Embodiment 3

[0024] Soak 200g of waste polyester-cotton blended fabric with a water content of 1% and a cotton content of 65% in 952.03g of NMMO solution containing 1.3g of hydroxylamine and a water content of 13.3% by weight. Swell at 80°C for 25min, then Raise the temperature to 90°C, stir for 5 minutes, stop stirring, and keep at this temperature for 1 hour to dissolve the cotton cellulose of the waste polyester-cotton blended fabric in the NMMO aqueous solution, and then use vacuum filtration to separate the polyester fiber in the solution to obtain the cellulose-containing The solution.

[0025] The most important point of the present invention is that when recycling waste polyester-cotton fabrics, compared with previous methods, it greatly improves the recovery of cotton cellulose in waste polyester-cotton fabrics, not only as fillers, but as It is dissolved into cellulose solution to produce and process cellulose film or silk. In addition, the dissolution rate of cotton cellulos...

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PUM

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Abstract

The invention provides a method for recycling cotton-containing components in waste cotton-polyester blended fabrics. The method is characterized by comprising the steps of soaking the waste cotton-polyester blended fabrics in solution containing an antioxidant and 4-methylmorpholine-N-oxide to dissolve the cotton cellulose in the blended fabrics and then carrying out solid-liquid separation to obtain solution containing cellulose and polyester. The method has the following beneficial effects: the cotton cellulose in the blended fabrics can be well dissolved; the polyester can not be damaged;and the environment can not be polluted.

Description

technical field [0001] The invention relates to a method for recovering cotton components in waste polyester-cotton blended fabrics, belonging to the technical field of textiles. Background technique [0002] For cellulose fibers, people usually use 4-methylmorpholine-N-oxide (NMMO) solution as the direct solvent of cellulose fibers, and cellulose films and LYOCELL fibers can be prepared by dissolving cellulose with NMMO aqueous solution. As early as the 1930s, the basic patent (USP-2,179,181) for dissolving cellulose by tertiary amine oxides was formed. Since the 1970s, hundreds of patents have appeared for tertiary amine oxides to directly dissolve cellulose, such as EP-A-0553070 , EP-A-0356419, DE-A-2913589, WO 95 / 04173, WO97 / 47790, DD-A-218121, EP-A-0574870, AT-B-397392, GB-A-1,017,855, WO 92 / 144871、WO92 / 07124、DE-A-4219658、WO 96 / 18760、US-A-4,246,221以及中国专利申请96197127、96191362、96191361、95193763、95193716、94192192、94192048、98801167、98800540、97190439、96193341等。 If it is fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J11/08C08L1/02C08L67/02C08K5/13C08K5/134
CPCC08J11/08C08J2301/02C08J2367/02Y02W30/62
Inventor 张瑞云周文娟沈宇燕敬雪
Owner DONGHUA UNIV
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