Multi-layer, microporous polyolefin membrane, its production method, and battery separator
US8932748B2 · kind B2 · utility
4Cited by
5References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 23, 2006 |
| Grant date | Jan 13, 2015 |
| Priority date | — |
| Expiry date | Jul 14, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249978
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
(1) a combination of a microporous layer made of a polyethylene resin and a microporous layer made of polypropylene and a heat-resistant resin having a melting point or a glass transition temperature of 170° C. or higher, or (2) a combination of a microporous layer made of a polyethylene resin and a microporous layer made of polypropylene and inorganic filler having an aspect ratio of 2 or more provides a multi-layer, microporous polyolefin membrane with well-balanced permeability, mechanical strength, heat shrinkage resistance, shutdown properties and meltdown properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.