Microporous composite membrane and its producing method and use
US7785735B2 · kind B2 · utility
0Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2004 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Apr 13, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A microporous composite membrane comprising a microporous polyolefin membrane and a polypropylene-based coating layer formed on at least one surface of the microporous polyolefin membrane, the polypropylene having a mass-average molecular weight within a range of 5,000-500,000, and solubility of 0.5 g or more in 100 g of toluene at a temperature of 25° C., and the microporous composite membrane having air permeability (converted to the value at 25-μm thickness) of 50-10,000 seconds/100 cc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.