Process for preparing a polymeric film
US4218498A · kind A · utility
8Cited by
10References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1975 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Aug 19, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D7/01
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of preparing a polymeric film comprising the steps of applying a layer of solution of the polymer in a volatile solvent therefor to a support, heating the solution to evaporate at least part of the solvent and, before the polymer is dry, applying to the surface of the polymer layer a surfactant which is soluble in the polymer solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.