Method for the orientation of thermoplastic polyether ether ketone films
US4435350A · kind A · utility
12Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 18, 1982 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Feb 18, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2371/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for the orientation of a thermoplastic polyether ether ketone film or sheet is described, which comprises rolling the thermoplastic polyether ether ketone film or sheet containing therein a repeating unit represented by the formula: ##STR1## singly or in combination with one or more different repeating units at a linear pressure of at least 100 kg/cm by the use of at least one pair of pressure rolls maintained within a temperature range of from 80.degree. C. to 320.degree. C. while applying a backward tension of at least 80 kg/cm.sup.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.