Process for preparing strong aromatic polyamide papers of high porosity
US5223094A · kind A · utility
29Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1992 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | May 13, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/0293
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Papers with improved tensile strength and increased porosity are obtained by heat treatment of calendered sheets of poly(p-phenylene terephthalamide) short fibers and poly(m-phenylene isophthalamide) fibrids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.