Title:
PREPARATION METHOD FOR RECYCLED POLYESTER FIBER COMPRISING TRACER
Document Type and Number:
WIPO Patent Application WO/2023/030252
Kind Code:
A1
Abstract:
The present invention relates to a preparation method for a recycled polyester fiber comprising a tracer. After ethylene glycol comprising a tracer is mixed with a purified waste PET depolymerization product, a spinning melt is obtained by esterification or transesterification and condensation polymerization, then a recycled polyester fiber comprising a tracer is obtained by spinning; or waste PET is mixed with ethylene glycol Ⅰ, alcoholysis reaction is performed, an alcoholysis product is purified, ethylene glycol ⅠⅠ is added to the purified alcoholysis product, a spinning melt is obtained by transesterification and condensation polymerization, then a recycled polyester fiber comprising a tracer is obtained by spinning, wherein the ethylene glycol comprising the tracer is isotopically labeled 13C-ethylene glycol, and the addition amount of the ethylene glycol comprising the tracer is 1-3 wt% of the content of ethylene glycol in the waste PET depolymerization product. In the present invention, a basic constituent element, i.e., a carbon element, of polyester is labelled by using an isotope labelling and tracing method, and other specific elements and functional groups are not added, so that durable traceability is achieved, the stability of back-end spinning operation is good, and the dyeing uniformity is good.
Inventors:
HE CHAOHENG (CN)
JIN GUANFAN (CN)
WANG YONGFENG (CN)
CHEN MING (CN)
JIA FENG (CN)
WU YUJUN (CN)
JIANG FUJIAN (CN)
ZHENG SONGMING (CN)
JIN GUANFAN (CN)
WANG YONGFENG (CN)
CHEN MING (CN)
JIA FENG (CN)
WU YUJUN (CN)
JIANG FUJIAN (CN)
ZHENG SONGMING (CN)
Application Number:
PCT/CN2022/115507
Publication Date:
March 09, 2023
Filing Date:
August 29, 2022
Export Citation:
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
D01F6/92; D01D5/08; D01F1/10
Foreign References:
| CN113502563A | 2021-10-15 | |||
| JP2002173523A | 2002-06-21 | |||
| JP2002161064A | 2002-06-04 | |||
| CN112204093A | 2021-01-08 | |||
| CN102505175A | 2012-06-20 | |||
| CN108641120A | 2018-10-12 | |||
| CN104357938A | 2015-02-18 | |||
| CN113073393A | 2021-07-06 | |||
| CN113185811A | 2021-07-30 |
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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