Microwave susceptor comprising a dielectric silicate foam substrate coated with a microwave active coating
AssigneeThe Procter & Gamble Company
InventorsRobert Lawrence Prosise, Paul Ralph Bunke, Phillip Floyd Pflaumer, Joseph Anthony Milenkevich
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Abstract
The present invention provides a microwave silicate foam susceptor which comprises a dry sodium silicate foam substrate coated with an effective amount of microwave active material. The silicate is preferably a sodium silicate, but can be other suitable alkali metal silicate, and the active constituent is preferably graphite, but other actives can be used. The susceptor of the present invention is capable of quickly reaching and more importantly maintaining extremely high temperatures. This enables it to brown and crispen foods in a microwave oven.
Claims33
A microwave foam silicate susceptor comprising:
- a) a dry dielectric alkali metal silicate foam substrate having a moisture content of from about 0% to about 5% by weight;
- and
- b) a dry layer of a microwave active coating comprising an alkali metal silicate binder and a microwave active constituent in a weight ratio of from about 98:2 to about 15:85;
- and
- wherein said dry layer of said microwave active coating material overlays at least a portion of said foam substrate and has a surface concentration of said microwave active constituent of at least about 1.0 gram per square meter.
A microwave foam silicate susceptor comprising a dry sodium silicate foam substrate, having a moisture content of from about 0% to about 5% by weight coated with a layer comprising an alkali metal silicate binder and a microwave active material in a weight ratio of from about 98:2 to about 15:85, wherein said substrate has a surface concentration of said microwave active material of at least about 1.0 grams per square meter.
Dependencies are inferred from the claim text.