Process for making an element for microwave heating

Details Process for making an element for microwave heating Process for making an element for microwave heating

1989-04-12

1990-04-10

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156634, 156656, 1566591, 156665, B44C 122, C23F 102, C03C 1500, C03C 2506

Patent

active

049157809

ABSTRACT:
A novel laminate of a partially-demetallized polymeric material web and stiff card is used to effect microwave reconstitution of frozen pizza with a more uniform cooking than previously achieved. The polymeric material web includes a metallized region having a central portion which has a first metal density and a peripheral portion having a lesser metal density. A novel demetallizing process is employed to achieve such differential metal density by applying etchant-resistant material to the metal surface through screen prior to etching, with the number of screen lines being varied to change the density.

REFERENCES:
patent: 4230924 (1980-10-01), Brastad et al.
patent: 4242378 (1980-12-01), Arai
patent: 4398994 (1983-08-01), Beckett
patent: 4552614 (1985-11-01), Beckett
patent: 4610755 (1986-09-01), Beckett
patent: 4685997 (1987-11-01), Beckett

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