Microporous composite membrane and its production method and use
US7781094B2 · kind B2 · utility
5Cited by
2References
1Claims
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Key dates
| Filing date | Nov 17, 2004 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Oct 22, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31909
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A microporous composite membrane obtained by coating at least one surface of a microporous polyolefin membrane with a solution of a gelable fluororesin in a mixed solvent of a good solvent for the fluororesin, and a poor solvent having a dipole moment of 1.8 Debye or less and drying to form a porous coating layer of the above fluororesin has cylindrical penetrating pores formed in the above coating layer, with well-balanced permeability, adhesion to electrodes, mechanical strength, heat shrinkage resistance, shutdown properties and meltdown properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.