Shaped polymeric articles having improved receptivity to organic coatings
US4844979A · kind A · utility
13Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1986 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Feb 13, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The receptivity of shaped polymer articles (e.g., self-supporting films of polypropylene) to subsequently applied organic coatings is enhanced by exposure to an electrical discharge in the presence of a chlorocarbon or chlorofluorocarbon gas, thereby providing an extremely thin chlorine-containing surface layer in which the Cl:C ratio is inversely related to the distance from the face of the layer. Preferred embodiments of the invention include tape products in which the primed surface of the backing is coated with a pressure-sensitive adhesive or a low adhesion backsize.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.