초록

A thermoformed polymeric foam article, such as a cup or container, is disclosed having improved thermal insulation properties. Contact with hot water causes expansion of the foam wall, substantially decreasing foam density and providing greater heat retention.

대표청구항 ▼

A thermoplastic foam container consisting essentially of oriented styrenic polymer having a deep drawn wall of polymer foam, said foam characterized by containing flat, elongated, pancake-shaped, interleaved, gas-containing cells, uniformly distributed generally parallel to the codirectional wall su

A thermoplastic foam container consisting essentially of oriented styrenic polymer having a deep drawn wall of polymer foam, said foam characterized by containing flat, elongated, pancake-shaped, interleaved, gas-containing cells, uniformly distributed generally parallel to the codirectional wall surfaces; said styrenic polymer having a Vicat softening point of at least 100°C.; said wall further characterized by having an average specific gravity of less than 0.15 prior to any thermally caused increase in wall thickness; and said container capable of undergoing an excess of 10% increase in wall thickness when subjected to a temperature between about 82°C. and about 100°C.