Title:
HIGH-STRENGTH AND LOW-ELONGATION POLYESTER INDUSTRIAL YARN AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/142400
Kind Code:
A1
Abstract:
The present invention relates to a high-strength and low-elongation polyester industrial yarn and a preparation method therefor. Modified polyester is subjected to solid-state polycondensation, spinning, winding, and complexing treatment to prepare a high-strength and low-elongation polyester industrial yarn. A method for complexing treatment is: soaking wound fibers in a complexing agent aqueous solution having a concentration of 0.1-0.2 mol/L; the condition for complexing treatment is that if complexing treatment is to be performed at 80-100ºC for 48-72 hours, the concentration of the complexing agent aqueous solution is 0.1-0.2 mol/L; a polyester chain segment of the prepared high-strength, low-elongation, and thermal stable polyester industrial yarn comprises a terephthalic acid chain segment, an ethylene glycol chain segment, and a 2,5-pyridinedicarboxylic acid chain segment, and 2,5-pyridinedicarboxylic acid chain segments of different polyester chain segments are complexed by means of Fe3+; the molar ratio of the terephthalic acid chain segment to the 2,5-pyridinedicarboxylic acid chain segment is 1:0.05-0.07; and O atoms on two carbonyls and an N atom on pyridine in the 2,5-pyridinedicarboxylic acid chain segment participate in the complexing. In the present invention, physical crosslinking points in the polyester industrial yarn are increased by complexing the 2,5-pyridinedicarboxylic acid chain segments of different polyester chain segments by means of Fe3+, such that the breaking strength is greatly improved.
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Inventors:
FAN HONGWEI (CN)
CHEN RUI (CN)
SHAO YIWEI (CN)
WANG LILI (CN)
ZHANG YUANHUA (CN)
NIU ZANGZANG (CN)
ZHANG JINGJING (CN)
CHEN RUI (CN)
SHAO YIWEI (CN)
WANG LILI (CN)
ZHANG YUANHUA (CN)
NIU ZANGZANG (CN)
ZHANG JINGJING (CN)
Application Number:
PCT/CN2021/114245
Publication Date:
July 07, 2022
Filing Date:
August 24, 2021
Export Citation:
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
D01F6/84; C08G63/685; D06M11/28; D06M101/32
Foreign References:
| CN112725921A | 2021-04-30 | |||
| CN106400162A | 2017-02-15 | |||
| CN108130610A | 2018-06-08 | |||
| US4931532A | 1990-06-05 | |||
| CN106350886A | 2017-01-25 | |||
| CN108130611A | 2018-06-08 | |||
| US4079045A | 1978-03-14 |
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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