Polytetrafluoroethylene mixture
US8865839B2 · kind B2 · utility
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5References
8Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 21, 2011 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Dec 21, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is a material that can be easily biaxially oriented, homogeneously stretched even with a high draw ratio, and formed into a polytetrafluoroethylene porous membrane with low pressure loss. The present invention relates to a polytetrafluoroethylene mixture comprising: a modified polytetrafluoroethylene; and a fibrillable polytetrafluoroethylene homopolymer, the modified polytetrafluoroethylene having an extrusion pressure to a cylinder, at a reduction ratio of 1600, of 70 MPa or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.