Abstract: A thermocompensating susceptor is described comprising a microwave transparent sheet, e.g. paper, paperboard or plastic, having a layer thereon of a dried dispersion comprising a film forming vehicle together with two kinds of dispersed particles including microwave interactive particles such as a metal, metal oxide, carbon or graphite that absorbs microwave energy to produce heat in a microwave oven and electrically nonconductive thermocompensating particles of a mineral hydrate containing bound water of crystallization and having a dissociation temperature between about 100.degree. F. and 500.degree. F., at which temperature the bound water is released therefrom to prevent overheating of the laminate.

Abstract: The invention provides a package for popping popcorn in a microwave oven including an open-topped wide mouth container in the form of a tub or bowl formed from self-supporting, i.e. stiff, microwave transparent sheet material such as stiff paper or paperboard with a flexible and expandable cover. A layer of microwave interactive susceptor material is distributed across the bottom wall of the tub to assist in popping the popcorn. Unpopped popcorn within the tub is packaged in a sealed inner compartment or container within the tub. During cooking, the flexible cover expands upwardly as the kernels pop so as to accommodate their expansion.

Abstract: A thermocompensating susceptor is described comprising a microwave transparent sheet, e.g. paper, paperboard or plastic, having a layer thereon of a dried dispersion comprising a film forming vehicle together with two kinds of dispersed particles including microwave intractive particles such as a metal, metal oxide, carbon or graphite that absorbs microwave energy to produce heat in a microwave oven and electrically nonconductive thermocompensating particles of a mineral hydrate containing bound water of crystallization and having a dissociation temperature between about 100.degree. F. and 500.degree. F., at which temperature the bound water is released therefrom to prevent overheating of the laminate.