Process of manufacturing porous multi-expanded fluoropolymers
US5071609A · kind A · utility
161Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1988 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Nov 3, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31544
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Interpenetrated matrix of polytetrafluoroethylene and elastomer is disclosed. The matrix is formed into a composite material which is flexible, durable, highly porous with a tight microporous structure and improved retractability. The composite material is subjected to a multi-expansion process to produce shaped articles such as films, tubes, rods and filaments with excellent flexibility and elasticity. More particularly, the composite material can be utilized to produce vascular grafts with excellent biological compatibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.