Laminate of biaxially oriented polystyrene film and polystyrene

Details Laminate of biaxially oriented polystyrene film and polystyrene Laminate of biaxially oriented polystyrene film and polystyrene

1975-09-23

1977-03-08

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428315, 428515, 428910, B32B 326

Patent

active

040113574

ABSTRACT:
A method for the production of laminates comprising oriented thermoplastic film heat bonded to a thermoplastic foam which comprises extrusion of a thermoplastic foam containing a blowing agent which has a plasticizing action upon the foam material and while the extruded foam still contains residual blowing agent, heat welding an oriented thermoplastic film to the foam. Disorientation of the oriented film in accord with the present method is eliminated by virtue of the lower heat bonding temperatures necessary to achieve an effective weld by virtue of the presence of the blowing agent-plasticizer material remaining in the foam.

REFERENCES:
patent: 3234065 (1966-02-01), Best
patent: 3481818 (1969-12-01), Wellen
patent: 3619344 (1971-11-01), Wolinski et al.
patent: 3649437 (1972-03-01), Wolinski et al.
patent: 3791916 (1974-02-01), Eastes

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