Patent ID: 9289728
Filing Date: 2016-03-22
CPC Classification: B01D,B29C,B32B,H01M,Y02E

Claim Text:
1. A microporous membrane comprising a first polyethylene in an amount of 1.0 wt. % to 20.0 wt. %, having a T 80 ≦130.0° C., a T 25 ≧100.0° C., a T 80 −T 25 ≦25.0° C., and an Mw of 1.0×10 4 to 4.0×10 5 , the wt. % being based on the weight of the membrane, a second polyethylene having an Mw>1.0×10 6 , and a third polyethylene having an Mw≦1.0×10 6 and a T 80 >132.0° C., wherein the microporous membrane is a monolayer membrane that is an extrudate comprising the first polyethylene and has a shutdown temperature in the range of 120° C. to 130° C.