Method for surface treatment of film
US4832772A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1988 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Jun 6, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1956
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
There is provided a method for plastic film surface treatment for improving printability and adhesion properties which comprises feeding a plastic film and a wiping web in the opposite direction to each other in a ratio of the film running speed to the wiping web running speed being 1/1 to 100/1 and bringing them into contact with each other between knip rolls under a proper pressure, whereby a weak layer containing oligomers and additives is wiped off from the plastic film surface. The treatment improves the printability and adhesion of film inexpensively in a stable manner without being affected by the varied properties of film to be treated and also without deteriorating the physical properties of the film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.