Oriented polymer films, a process for the preparation thereof
US4851173A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1986 |
| Grant date | Jul 25, 1989 |
| Priority date | — |
| Expiry date | May 20, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C55/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for the continuous preparation of an oriented film of a polymer material comprising shearing at least one film of a solution and/or gel of the polymer material between at least one set of two solid surfaces which are in motion relative to one another. At least one of which surfaces is endless, so as to cause by the shearing, solidification of the polymer material from the solution or gel to a degree sufficient that a coherent, oriented film of the polymer material is formed on one of the surfaces. The film is sufficiently coherent so as to be capable of being removed from the surface on which it is formed in a continuous manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.