Cryovac, Inc.

Andrea Paci

Eugenio Longo

The present invention relates to a process for thermoforming a foamed polyester sheet of low crystallinity to produce a heat-resistant molded foam article (). The process comprises the steps of heating a foamed polyester sheet () to a preforming temperature by contact with at least one heating plate and molding the heated foamed polyester sheet onto a non-heated mold (). The present invention further relates to a process for manufacturing a package by thermoforming a foamed polyester sheet of low crystallinity to produce a heat-resistant molded foam container, loading a product () into said container and sealing or welding a film of thermoplastic material () onto said container to close it. The heat-resistant molded foam articles and the packages thus obtained are excellent in heat resistance and are not thermally distorted even when heated in a microwave or conventional oven. They are particularly useful for the packaging of food products for dual ovenable applications.

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Milan, Italy

Andrea Paci