Packaging structure

Details Packaging structure Packaging structure

1992-10-14

1994-06-07

Loney, Donald J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Nonplanar uniform thickness material

428172, 428179, 428213, 428216, 428516, 428212, 206531, 206532, 206538, B32B 312, B65D 8304

Patent

active

053188241

ABSTRACT:
A packaging structure composed of a composite synthetic resin sheet having a depressed portion formed therein for holding an article and a metal foil bonded to the sheet, said composite sheet being a three-layer sheet composed of an interlayer of high-density polyethylene and outside layers of a propylene polymer bonded to both surfaces of the interlayer, the interlayer having a thickness of 120 to 800 micrometers, each of the outside layers having a thickness of 15 to 80 micrometers, and the thickness of the interlayer being at least 2.5 times the total thickness of both outside layers; a process for production thereof; and a process for producing a composite (synthetic) resin sheet suitable as a material for the aforesaid packaging structure.

REFERENCES:
patent: 3462329 (1969-08-01), Beyer
patent: 3878018 (1975-04-01), Cospen et al.
patent: 3925591 (1975-12-01), Breitenfellner et al.
patent: 4126262 (1978-11-01), Thompson
patent: 4229927 (1980-10-01), Day
patent: 4252851 (1981-02-01), Lansbury
patent: 4322465 (1982-03-01), Webster
patent: 4372098 (1983-02-01), Mason
patent: 4460631 (1984-07-01), Steigmeier
patent: 4574104 (1986-03-01), Ashima

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