The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 11, 2018
Filed:
Jun. 23, 2014
Tianjin Dg Membrane Technology Co., Ltd., Tianjin, CN;
Xin Li, Tianjin, CN;
Jianhua Li, Tianjin, CN;
Yongjun Jiao, Tianjin, CN;
Long Li, Tianjin, CN;
Wei Chen, Tianjin, CN;
Xinjian Deng, Tianjin, CN;
TIANJIN DG MEMBRANE TECHNOLOGY CO., LTD., Tianjin, CN;
Abstract
A microporous membrane of a polyethylene-based composite material, including high density and high crystallinity of polyethylene as a base material. The polyethylene is modified by a modifying agent accounting for 10-25 wt. % of the membrane and including a moderate molecular weight of rubber selected from polyisobutylene (PIB), ethylene-propylene methylene copolymer (EPM), or a mixture thereof, the rubber having a dynamic viscosity of between 50 and 2000 Pa·S at 100° C. and a weight average molecular weight of between 90,000 and 250,000. The modified polyethylene is dissolved in a solvent and a pore-forming agent for pore formation.