Method for making a thin film of polymer
US4925612A · kind A · utility
2Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1989 |
| Grant date | May 15, 1990 |
| Priority date | — |
| Expiry date | Sep 5, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D7/01
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for making a polymer thin film wherein a first polymer thin film is formed on a support liquid, on which a solution of a second polymer is dropped is described. The first polymer film is pulled in opposite directions to break the first polymer film as a slit, from which the second polymer solution is cast on the support liquid. As a result, the solution can spread uniformly without involving any appreciable irregularity in thickness of a final film product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.