High strength porous polytetrafluoroethylene product having a coarse microstructure
US4598011A · kind A · utility
72Cited by
12References
23Claims
0Family size
Inventor
Key dates
| Filing date | Mar 27, 1984 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Mar 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Porous polytetrafluoroethylene materials having high strength and coarse microstructure are produced by densifying the materials after removal of lubricant and then stretching. The term, "coarse," is used to indicate that the nodes are larger, the fibrils are longer, and the effective pore size is larger than conventional materials of the same matrix tensile strength. Densification can be achieved through the use of such devices as a densification die, a calender machine, or a press. This invention can be used to produce all kinds of shaped articles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.