Title:
HIGH-STRENGTH HEAT-STABLE POLYESTER INDUSTRIAL FILAMENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/142406
Kind Code:
A1
Abstract:
The present invention relates to a high-strength heat-stable polyester industrial filament and a preparation method therefor. The high-strength heat-stable polyester industrial filament is prepared by performing spinning, winding and coordination treatment on a modified polyester after solid-phase polycondensation and tackifying treatment. The coordination treatment method comprises: immersing wound fibers in an aqueous solution of a coordinating agent, the concentration of the aqueous solution of the coordinating agent being 0.1-0.2 mol/L. Conditions for the coordination treatment comprise 80 °C-100 °C for 48-72 hours, and a concentration of the aqueous solution of the coordinating agent of 0.1-0.2 mol/L. The polyester segments of the prepared high-strength heat-stable polyester industrial filament include terephthalic acid segments, ethylene glycol segments and 2,6-pyridinedicarboxylic acid segments. Furthermore, 2,6-pyridinedicarboxylic acid segments of different polyester segments are coordinated by means of Fe3+, the molar ratio of the terephthalic acid segment to the 2,6-pyridinedicarboxylic acid segment is 1: 0.03-0.05, and the O atom on the two carbonyl groups and the N atom on the pyridine of the 2,6-pyridinedicarboxylic acid segment are involved in the coordination. The present invention uses a coordination technique, and after Fe3+ forms a coordination bond with pyridine, the glass transition temperature of the polyester fiber is increased, and the thermal stability is enhanced.
Inventors:
WANG SHANSHUI (CN)
TANG FANGMING (CN)
WANG LILI (CN)
SHAO YIWEI (CN)
ZHAO YANLI (CN)
WANG XIAOYU (CN)
YANG CHAOMING (CN)
TANG FANGMING (CN)
WANG LILI (CN)
SHAO YIWEI (CN)
ZHAO YANLI (CN)
WANG XIAOYU (CN)
YANG CHAOMING (CN)
Application Number:
PCT/CN2021/114425
Publication Date:
July 07, 2022
Filing Date:
August 25, 2021
Export Citation:
Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
D01F6/84; C08G63/685; D06M11/28; D06M101/32
Foreign References:
| CN112725920A | 2021-04-30 | |||
| CN108130609A | 2018-06-08 | |||
| CN111100266A | 2020-05-05 | |||
| CN108976401A | 2018-12-11 | |||
| CN108130611A | 2018-06-08 | |||
| US4079045A | 1978-03-14 | |||
| US4931532A | 1990-06-05 |
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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