Title:
METHOD FOR PREPARING HIGH-STRENGTH AND HIGH-MODULUS POLYETHYLENE FIBER
Document Type and Number:
WIPO Patent Application WO/2020/052360
Kind Code:
A1
Abstract:
Disclosed is a method for preparing a high-strength and high-modulus polyethylene fiber. The method comprises: blending a polyethylene raw material having a weight-average molecular weight of 0.6-1.2 million obtained by the polymerization of a single active center catalyst and an auxiliary agent; extruding the blend via a screw extruder as unstretched polyethylene thick filaments; after the unstretched thick filaments are cooled, same entering a hot cabinet for a high-temperature multistage stretching; and rolling a polyethylene fiber, which has been subjected to multistage stretching, to obtain a polyethylene fiber having a tensile strength of 25 cN/dtex or more and a tensile modulus of 900 cN/dtex or more. In contrast to the prior art, the preparation method has a simple production process flow, is environmentally friendly and energy-saving, and has a high safety factor, and a low production cost.
More Like This:
Inventors:
YE CHUNLIN (CN)
XIAO MINGWEI (CN)
LI JIANLONG (CN)
ZHANG ZHENFEI (CN)
YE XIAOFENG (CN)
XIAO MINGWEI (CN)
LI JIANLONG (CN)
ZHANG ZHENFEI (CN)
YE XIAOFENG (CN)
Application Number:
PCT/CN2019/098640
Publication Date:
March 19, 2020
Filing Date:
July 31, 2019
Export Citation:
Assignee:
SHANGHAI RES INSTITUTE OF CHEMICAL INDUSTRY CO LTD (CN)
SHANGHAI LIANPU CHEMICAL INDUSTRY SCIENCE AND TECH CO LTD (CN)
SHANGHAI LIANPU CHEMICAL INDUSTRY SCIENCE AND TECH CO LTD (CN)
International Classes:
D01F6/46; D01F1/10; D01D5/08; D01D5/12
Foreign References:
| CN109306541A | 2019-02-05 | |||
| CN104711697A | 2015-06-17 | |||
| CN102030844A | 2011-04-27 | |||
| CN102002769A | 2011-04-06 | |||
| CN107841796A | 2018-03-27 | |||
| US20160153122A1 | 2016-06-02 |
Attorney, Agent or Firm:
SHANGHAI KESHENG INTELLECTUAL PROPERTY AGENCY LTD. (CN)
Download PDF: