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US 9,178,202 B2Granted
Polyolefin microporous membrane and method of producing the same, separator for non-aqueous secondary battery and non-aqueous secondary battery
AssigneeTeijin Limited
InventorsHiroki Sano, Satoshi Nishikawa, Takashi Yoshitomi
Life of this patent
Estimating the term…
Abstract
The present invention provides a polyolefin microporous membrane in which a degree of crystallinity is from 60 to 85%, and a tie molecular volume fraction is from 0.7 to 1.7%.
Claims12
A separator for a non-aqueous secondary battery, the separator comprising:
- a polyolefin microporous membrane. wherein a degree of crystallinity is from 60 to 85%, and a tie molecular volume fraction is from 0.7 to 1.7%;
- and
- an adhesive porous layer containing vinylidene fluoride resin provided on one side or both sides of the polyolefin microporous membrane.
Dependencies are inferred from the claim text.