US 5,285,040 AGranted

Microwave susceptor with separate attenuator for heat control

AssigneeGolden Valley Microwave Foods Inc.

InventorsLawrence C. Brandberg, Jeffrey T. Watkins, Sara J. Risch

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Abstract

A thermocompensated susceptor laminate is described comprising a microwave transparent sheet, e.g., paper, paperboard or plastic, having two layers thereon. One layer is a microwave interactive susceptor layer, e.g., a dried dispersion comprising a film-forming vehicle together with microwave interactive particles such as metal, metal oxide, carbon or graphite that absorbs microwave energy to produce heat in a microwave oven. The second layer is an attenuator layer which includes electrically nonconductive thermocompensating particles of a mineral. One mineral attenuator is a hydrate containing bound water 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.

Claims6

Dependent claims

A laminate for microwave heating, toasting, browning or crisping foods comprising,

a paper backing,
a microwave susceptor material as a layer carried by the paper backing for producing heat when exposed to microwave energy, said susceptor layer including a sufficient amount of microwave interactive material for heating of said susceptor material through absorption of microwave energy during heating in a microwave oven,
a microwave attenuator separate from the microwave susceptor material,
said attenuator is incorporated into the composition of the paper as a part of the paper backing, and the microwave susceptor layer is applied to a surface of the paper as a coating thereon,
said attenuator within the paper being associated in heat conductive relationship with the microwave susceptor material layer,
said attenuator comprising electrically nonconductive, microwave noninteractive mineral particles present in an amount sufficient to absorb heat and to inhibit overheating of the microwave susceptor layer during heating in a microwave oven.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/938,815Filed 1 Sep 1992 · continuation in part
Priority: 22 Dec 1989
Granted: 8 Feb 1994
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B65D 81/3446
For packaging foodstuffs or other articles intended to be cooked or heated within the package: specially adapted to be heated by microwaves
B65D 2581/344
Means for affecting the heating or cooking properties: geometry or shape factors influencing the microwave heating properties
B65D 2581/3447
Means for affecting the heating or cooking properties: heat attenuators, blocking agents or heat insulators for temperature control
B65D 2581/3448
Means for affecting the heating or cooking properties: binders for microwave reactive materials, e.g. for inks or coatings