Process for protecting thermoformed films
US4824506A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Apr 21, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1911
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for thermoforming a decorative glossy film to a relatively rigid substrate includes the steps of: providing a carrier film having a heat absorption limit or a plurality of heat absorption limits above which decorative degradation occurs during direct exposure to heat sources of thermoforming apparatus; thermally protecting the surface of the carrier film with a layer of material with a heat absorption rate which will shield the carrier film against excessive heat buildup while softening the carrier film for drawing against a substrate; drawing the carrier film and the protective layer thereon into bonded engagement with the relatively rigid substrate; and thereafter removing the thermal protection layer without degrading the appearance of the decorative carrier film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.