Nakamoto Packs Co., Ltd.

Shigeru Takaoka

Hiroshi Shibano

Katsuro Sasauchi

Jun Kawata

This invention provides a food container which can be manufactured cheaply by using inexpensive general PET resin or further inexpensive PET resin for fiber or recovered PET flakes, and nevertheless, which has a high heat resistance up to 250&#xb0; C., and the container is obtained by adding a chain extender and a compatibilizer and talc to PET resin, charging the mixture into an extruderhaving two or more vent holes, degassing under a condition where the PET resin is melted with heating by sucking at a high vacuum of &#x2212;99.99 kPa or lower from the vent holes, thereafter, forming a sheet by extrusion molding, pressure-forming with vacuum the sheet by a thermoforming machine, forming the container by keeping in a mold at 100-220&#xb0; C. The container has a total of the content of crystal portion represented by the following formula and the content of talc being 25% by weight or more.

Heat-resistant food container and its manufacturing method

This invention relates to a method of making a heat-resistant transparent container which involves the steps of:

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Osaka, Japan

Shigeru Takaoka