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Patent Searching and Data


Title:
METHOD FOR RECYCLING WASTE POLYESTER-COTTON BLEND FABRICS
Document Type and Number:
WIPO Patent Application WO/2019/047176
Kind Code:
A1
Abstract:
Provided in the present invention is a method for recycling waste polyester-cotton blend fabrics: immersing a waste polyester-cotton blend fabric in an ester solvent having a structure as represented by formula (1); heating to dissolve the polyester; performing solid-liquid separation on the obtained mixture so as to obtain a polyester solution and an insoluble substance containing cotton fiber; then, recycling the polyester solution and the insoluble substance containing the cotton fiber respectively so as to obtain a polyester solid and cellulose regeneration fiber. The recycling method of the present invention may completely and thoroughly separate polyester from cotton fiber, avoiding the use of chemical agents that have high toxicity and that cause irritation, and the used reagent may be recycled and reused. The recycling method provided by the present invention has the advantages of being high-efficiency, being low-cost, being environmentally friendly, having a wide range of applications, and the like, while having the potential of industrial application.

Inventors:
KEH, Edwin Yee Man (R906, Shirley Chan BuildingThe Hong Kong Polytechnic University,Kowloon, Hong Kong 7, 999077, CN)
YAO, Lei (R906, Shirley Chan BuildingThe Hong Kong Polytechnic University,Kowloon, Hong Kong 7, 999077, CN)
LIAO, Xiao (R906, Shirley Chan BuildingThe Hong Kong Polytechnic University,Kowloon, Hong Kong 7, 999077, CN)
LIU, Yang (R906, Shirley Chan BuildingThe Hong Kong Polytechnic University,Kowloon, Hong Kong 7, 999077, CN)
CHEUK, Kevin (R906, Shirley Chan BuildingThe Hong Kong Polytechnic University,Kowloon, Hong Kong 7, 999077, CN)
CHAN, Alex (R906, Shirley Chan BuildingThe Hong Kong Polytechnic University,Kowloon, Hong Kong 7, 999077, CN)
Application Number:
CN2017/101111
Publication Date:
March 14, 2019
Filing Date:
September 08, 2017
Export Citation:
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Assignee:
THE HONG KONG RESEARCH INSTITUTE OF TEXTILES AND APPAREL LIMITED (R906-08, Shirley Chan BuildingThe Hong Kong Polytechnic,Kowlonn, Hong Kong 7, 999077, CN)
International Classes:
C08J11/08; C08L1/02; C08L67/02
Foreign References:
CN1252823A2000-05-10
CN103374144A2013-10-30
CN102199310A2011-09-28
CN106146877A2016-11-23
CN102061005A2011-05-18
CN103304839A2013-09-18
US5342854A1994-08-30
Attorney, Agent or Firm:
LUNG TIN INTELLECTUAL PROPERTY AGENT LTD. (18th Floor, Tower B Grand Place,No. 5 Huizhong Road, Chaoyang District, Beijing 1, 100101, CN)
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