ABUSE-TOLERANT METALLIC PACKAGING MATERIALS FOR MICROWAVE COOKING

摘要

An abuse-tolerant microwave food packaging material includes repeated sets o f metallic foil or high optical density evaporated material segments (22, 30) disposed on a substrate. Each set of metallic segments (22, 30) is arranged to define a perimeter (24, 32) having a length equal to a predetermined fractio n of the operating or effective wavelength of an operating microwave oven. The repeated sets of segments (22, 30) act both as a shield to microwave energy and as focusing elements for microwave energy when used in conjunction with food products, while remaining electrically safe in the absence of the food products.