Title:
EXTRUSION COATING PROCESS FOR MAKING HIGH TRANSPARENCY PROTECTIVE AND DECORATIVE FILMS
Document Type and Number:
WIPO Patent Application WO2000033975
Kind Code:
A3
Abstract:
A process for making a protective and decorative surfacing film comprises extrusion coating a solventless polymeric material from an extruder die to form an optically clear first layer on a polyester carrier sheet travelling past the extruder die opening. The extrusion coated first layer is immediately cooled on the carrier sheet to harden it, followed by applying a pigmented second layer to the first layer. The composite paint coat is transferred to a reinforcing backing sheet, after which the carrier sheet is separated from the paint coat to expose the outer surface of the first layer as a high gloss surface with a high distinctness-of-image, providing a transparent protective outer coat for the pigmented second layer. The pigmented second layer can be solvent cast and dried or extruded and hardened as a separate coating on the fist layer. The composite paint coat can be bonded to a coextruded size coat and semi-rigid plastic substrate panel to form a thermoformable laminate. Techniques are disclosed for producing extruded clear films of exceedingly high optical clarity using a closed air flow transport and HEPA filtration system that removes airborne particles from the resin handling and extrusion process, thereby preventing micron-sized contaminants naturally present from many sources from entering the process and degrading ultimate film quality.
Inventors:
ENLOW HOWARD H
MARKEY JOHN J
ROYS JOHN E
TRUOG KEITH L
YOUNG FREDERICK
MARKEY JOHN J
ROYS JOHN E
TRUOG KEITH L
YOUNG FREDERICK
Application Number:
PCT/US1999/029151
Publication Date:
September 08, 2000
Filing Date:
December 08, 1999
Export Citation:
Assignee:
AVERY DENNISON CORP (US)
International Classes:
B32B27/30; B05D1/00; B05D1/26; B29C31/04; B29C48/08; B29D7/01; B32B27/08; B32B37/15; B44C1/17; C08J9/00; B29K23/00; B29K27/00; B29K27/12; B29K33/04; B29K75/00; B29L7/00; B32B38/12; (IPC1-7): B05D1/26; B05D5/06
Foreign References:
| US4121535A | 1978-10-24 | |||
| US4985284A | 1991-01-15 | |||
| EP0137581A1 | 1985-04-17 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 014, no. 422 (P - 1104) 12 September 1990 (1990-09-12)
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