초록 ▼

The present invention provides packaging capable of room-temperature storage of foods followed by simplified microwave heating. The package also permits heating in conventional ovens. The package includes a multi-ply container portion having a central recess surrounded by a sealing rim to which is h

The present invention provides packaging capable of room-temperature storage of foods followed by simplified microwave heating. The package also permits heating in conventional ovens. The package includes a multi-ply container portion having a central recess surrounded by a sealing rim to which is heat sealed a lid which is flexible and non-extensible and has good barrier proporties. The inner surface of the container is amorphous polyethylene terephthalate to assure good heat sealing. The out ply of the container is crystallizable to provide sufficient dimensional stability during heating. The package can be retorted and vents itself when microwave heated, thus simplifying storage and preparation of foods.

대표청구항 ▼

A food package comprising: a formed container having a recessed area surrounded by a sealing rim, the container being formed from a multi-ply composite of polyethylene terephthalate wherein the outer ply is crystallizable and the inner ply is substantially amorphous, the container being capable of d

A food package comprising: a formed container having a recessed area surrounded by a sealing rim, the container being formed from a multi-ply composite of polyethylene terephthalate wherein the outer ply is crystallizable and the inner ply is substantially amorphous, the container being capable of dimensional stability during retorting; and a non-extensible flexible lid comprising a barrier substantially impervious to oxygen and water, and a heat-sealable layer capable of forming a seal with the substantially amorphous polyethylene terephthalate surface of the sealing rim which seal is retort-stable and releases sufficiently during microwave heating to vent the package.