초록 ▼

The present invention provides a food package useful for heating a food product in a microwave oven. The package has a tray with an opening for introducing the food product therein. Once the food has been introduced into the tray, the opening is sealed using a microwave releasable adhesive. The micr

The present invention provides a food package useful for heating a food product in a microwave oven. The package has a tray with an opening for introducing the food product therein. Once the food has been introduced into the tray, the opening is sealed using a microwave releasable adhesive. The microwave releasable adhesive seal includes a microwave interactive material in close proximity to a heat-releasable resin containing a blowing agent. The microwave interactive material preferably is composed of metallic flakes which become hot when exposed to microwave energy. Consequently, when the package is heated in a microwave oven, the microwave interactive material becomes hot, causing the blowing agent to decompose and form a gas. The gas formation destroys the integrity of the seal between the tray and the closure, permitting the seal to be opened easily after heating in a microwave oven.

대표청구항 ▼

A food package which is useful for heating a food product in a microwave oven, said package comprising in combination: (a) a tray containing the food product before and during microwave heating, the tray having a continuous sealing surface which defines an opening for introducing the food product in

A food package which is useful for heating a food product in a microwave oven, said package comprising in combination: (a) a tray containing the food product before and during microwave heating, the tray having a continuous sealing surface which defines an opening for introducing the food product into the tray and for removing the food product therefrom; (b) a closure covering the opening of said tray; and (c) a microwave releasable adhesive seal in heat sealed contact with the continuous sealing surface of the tray and with the closure sealing the food product in said tray; said microwave releasable adhesive seal comprising a microwave interactive material in close proximity to a heat-sealable resin containing a blowing agent which forms a gas during microwave heating of the package; wherein the seal is selectively releasable upon exposure of the package to microwave energy and resultant heating of the food product under microwave heating conditions.