Multilayer separator exhibiting improved strength and stability
US8486556B2 · kind B2 · utility
10Cited by
20References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2010 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Apr 7, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-layer microporous battery separator which comprises: a high molecular weight polypropylene layer having a melt flow index of ≦1.2 measured at layer; a polyethylene layer; and a high molecular weight polypropylene layer having a melt flow index of ≦1.2 measured at layer. The resulting microporous battery separator which is formed by a dry stretch process produces the microporous battery separator which has a porosity of ≦37% while maintaining a gurley from 13-25 seconds and a thickness of ≦25 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.