Foamable foil and method of making same

Details Foamable foil and method of making same Foamable foil and method of making same

1991-05-24

1992-07-07

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

156 79, 1563082, 4283044, 4283099, 4283186, 4283193, 4283197, B32B 326

Patent

active

051282011

ABSTRACT:
This invention relates to a method of making a foamable foil of at least one thermoplastic resin with at least one liquid blowing agent incorporated therein, said method comprising forming the thermoplastic resin into a layer between two foils, said resin comprising an excess of blowing agent, to form an assembly comprising at least an intermediate layer of resin with blowing agent and two other layers, whereafter the blowing agent partly diffuses from the intermediate layer.

REFERENCES:
patent: 2727278 (1955-12-01), Thompson
patent: 3860371 (1975-01-01), Willy
patent: 4025686 (1977-05-01), Zion
patent: 4569880 (1986-02-01), Nishiyama et al.
patent: 4804504 (1989-02-01), Lee et al.
patent: 4889763 (1989-12-01), Brambach

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