B - Operations – Transporting – 65 – D
Patent
B - Operations, Transporting
65
D
B65D 81/34 (2006.01)
Patent
CA 2090838
PRINTED MICROWAVE SUSCEPTOR Abstract Paperboard packaging material for use in the manu- facture of containers for browning and crisping food in a microwave oven is prepared on a printing press. The compo- nents of the packaging material include paperboard or an equivalent microwave transparent substrate, a susceptor layer prepared from a printable aqueous susceptor-ink composition, and an intermediate coating applied to the paperboard sub- strate before the susceptor layer is printed thereon to provide a thermal barrier between the paperboard substrate and the susceptor layer. The thermal barrier layer may be coated or printed on the paperboard substrate as a sub- stantially uniformly thick layer while the susceptor-ink layer may be pattern-printed on the substrate in varying thickness corresponding to the location of food intended to be packaged in containers prepared from the packaging material. The printed susceptor material is overprinted with a food contact coating. The invention also contemplates the use of pigments or the like in one or more of the food contact layer, susceptor layer or thermal barrier layer to facilitate the release of water vapor from these layers during the microwave beating process.
Hall Roger D.
Parks Christopher J.
Moffat & Co.
Westvaco Corporation
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