Polytetrafluoroethylene porous composite film
US5834528A · kind A · utility
21Cited by
5References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Feb 21, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An object is to provide a polytetrafluoroethylene (PTFE) porous composite film which has substantially no defect portion. There is provided the PTFE porous composite film by stretching a composite along its width direction which composite is composed of at least two overlapped films longitudinally stretched at a temperature not higher than a melting point of a sintered PTFE material, each film being obtained by paste-extruding and semi-sintering thereafter a PTFE produced by emulsion polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.