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Recovery method of waste polyester blended fabric containing natural fibers

A recycling method and technology for blended fabrics, which are applied in the recycling field of waste polyester blended fabrics, can solve the problems of complete separation of difficult-to-recycle materials, affecting the purity of recycling, and harming the environment, achieving a wide range of applications, wide applicability, and reducing environmental hazards. Effect

Inactive Publication Date: 2019-03-15
THE HONG KONG RES INST OF TEXTILES & APPAREL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the solvents used in the existing methods are highly toxic, costly and harmful to the environment. In addition, most of the existing methods are difficult to achieve complete separation of recyclates, which affects the recovery purity.

Method used

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  • Recovery method of waste polyester blended fabric containing natural fibers
  • Recovery method of waste polyester blended fabric containing natural fibers
  • Recovery method of waste polyester blended fabric containing natural fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Put 10 g of waste polyester-wool blended fabrics with a water content of 5%, a polyester content of 50%, and a wool content of 10% in a 4-methylmethanol solution containing 0.5 g of propyl gallate and 12% of deionized water at 65°C. Swell in 45ml of morphine-N-oxide solution for 30min, and then raise the temperature to 100°C to fully dissolve the natural base fibers in it for 60min. The mixture is separated from solid and liquid by vacuum filtration, the obtained protein / cellulose spinning dope is continuously extruded into water from the spinneret, and mechanically stretched 3 times to obtain regenerated protein / cellulose fibers, which are recovered and ion exchanged The column was purified from a solution of 4-methylmorpholine-N-oxide containing propyl gallate. The separated solid insoluble matter was immersed in 50ml dimethyl terephthalate at 170°C for 15 minutes, and then slowly poured into methanol. When the temperature dropped to 50°C, the precipitated polyester p...

Embodiment 2

[0066] With 8% water content, 30% polyester content, 10g waste polyester viscose wool blended fabric containing 15% wool content, placed in 4-methylmorpholine containing 1g propyl gallate and 14% deionized water at 75°C - Swell in 50ml of N-oxide solution for 20min, and then raise the temperature to 90°C to fully dissolve the natural base fibers in it for 80min. The mixture is separated from solid and liquid by vacuum filtration, and the obtained protein / cellulose spinning solution is continuously extruded into water from the spinneret, mechanically stretched 8 times, and regenerated protein / cellulose fibers are obtained, which are recovered and ion exchanged The column was used for purification of 4-methylmorpholine-N-oxide solution containing propyl gallate. The separated solid insoluble matter was immersed in 60ml of butyl benzoate at 190°C for 5 minutes, and then slowly poured into ethanol. When the temperature dropped to 60°C, the separated polyester particles were collec...

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Abstract

The invention provides a recovery method of a waste polyester blended fabric containing natural fibers. The recovery method comprises the following steps: putting the waste polyester blended fabric ina water soluble tertiary amine oxide solution containing an antioxidant, so that the natural fibers are dissolved to form a fiber solution and a solid insoluble matter; then recovering the fiber solution to obtain regenerated natural cellulose fibers and recovering a polyester solid through sequentially adding an ester solvent and fatty alcohols in the solid insoluble matter. The recovery methodprovided by the invention can separate polyester from other natural fibers, is suitable for all polyester blended fabrics, makes up the blank in the prior art, has high recovery rate for the polyesterand the regenerated natural cellulose fibers and avoids the use of a chemical reagent with high toxicity and large irritation, and the used reagent can also be recycled. The recovery method providedby the invention has the advantages of being high in efficiency, low in cost, environmentally-friendly, wide in application range and the like, thereby having industrial application potentials.

Description

technical field [0001] The invention belongs to the field of textile resource regeneration, and in particular relates to a method for recycling waste polyester blended fabrics containing natural base fibers. Background technique [0002] Polyester is an important variety of synthetic fibers, and it is a fiber made of polyethylene terephthalate polymer (PET) through spinning and post-processing. Polyester blended fabric is a textile product made by blending polyester fiber with other fibers such as cotton, wool, silk, and hemp. The main polyester blended fabrics include polyester-cotton blended fabric, wool-polyester blended fabric, polyester-linen blended fabric, polyester-viscose Blended fabrics, "three-in-one" blended fabrics (fabrics blended with polyester and two fibers, such as polyester wool linen, polyester linen cotton, polyester viscose wool, polyester cotton viscose, etc.). When so many types of polyester blended fabrics become waste textiles, it is urgent to find...

Claims

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Application Information

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IPC IPC(8): C08J11/08C08L67/02C08L67/00C08L89/00C08L1/02
CPCC08J11/08C08J2367/00C08J2367/02C08J2401/02C08J2489/00Y02W30/62
Inventor 葛仪文姚磊廖骁刘洋卓嘉良陈学聪
Owner THE HONG KONG RES INST OF TEXTILES & APPAREL
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