Process for production of polyester-polyolefin film laminates

Details Process for production of polyester-polyolefin film laminates Process for production of polyester-polyolefin film laminates

1983-03-14

1984-02-21

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156243, 15624411, 15624423, 15624424, B32B 3126

Patent

active

044328206

ABSTRACT:
A process for the production of a permanently bonded polyester-polyolefin film laminate is disclosed herein. The process involves exposing the surface of polyester or polyolefin film to contact with a flame so as to prime the surface thereof and thereafter coating the primed surface of the film with a layer of a molten polyolefin or polyester, respectively. Flame priming of the polyester or polyolefin film results in a permanent surface modification of the film. Thus, the time lapse between the priming of the polyester or polyolefin film and the subsequent coating with the molten polymer may be a matter of days, if desired.
Multi-layer laminates which comprise a substrate-polyester-polyolefin laminate, e.g., paperboard-polyester-polyolefin laminates, can be provided by the process of the present invention by providing a previously formed laminate of a substrate and a polyester film and flame priming the polyester surface of the laminate. Thereafter, a layer of a molten polyolefin is coated onto the primed polyester surface.

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patent: 3959567 (1976-05-01), Bradley

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