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1. (WO2017152731) METHOD FOR PREPARING LITHIUM-ION BATTERY SEPARATOR

Pub. No.:    WO/2017/152731    International Application No.:    PCT/CN2017/073087
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Feb 09 00:59:59 CET 2017
IPC: H01M 2/14
H01M 2/16
Applicants: SHANGHAI ENERGY NEW MATERIALS TECHNOLOGY CO., LTD.
上海恩捷新材料科技股份有限公司
Inventors: CHENG, Alex
程跃
SU, Xiaoming
苏晓明
WANG, Weiqiang
王伟强
HE, Fangbo
何方波
CHEN, Yongle
陈永乐
Title: METHOD FOR PREPARING LITHIUM-ION BATTERY SEPARATOR
Abstract:
Disclosed is a method for preparing a lithium-ion battery separator. The method comprises: performing cooling, molding, stretching, and reaming on a liquid phase stable system that contains polyethylene, and then performing solvent extraction and thermoforming to obtain a lithium-ion battery separator, wherein the stretching and reaming processes comprise prestretching and simultaneous bidirectional stretching, and the prestretching is completed before the simultaneous bidirectional stretching.