Polyolefin microporous membrane and method of producing the same, separator for non-aqueous secondary battery and non-aqueous secondary battery
US9178202B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Apr 7, 2015 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Apr 7, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.