Composite polytetrafluoroethylene article and a process for making the same
US4283448A · kind A · utility
49Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1980 |
| Grant date | Aug 11, 1981 |
| Priority date | — |
| Expiry date | Feb 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3154
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A porous polytetrafluoroethylene (PTFE) article which is made up of a number of smaller articles with a microstructure of nodes interconnected by fibrils, these articles having been joined to one another such that their microstructure is virtually unaltered across the join. A process for producing such a PTFE article by closely abutting small-shaped PTFE segments and applying a force perpendicular to the seam while heating to a temperature above the crystalline melt point of the segments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.