Method for producing biodegradable packaging material

Details Method for producing biodegradable packaging material Method for producing biodegradable packaging material

1989-06-23

1991-02-12

Simmons, David

Plastic and nonmetallic article shaping or treating: processes

With step of cooling to a temperature of zero degrees c. or...

383 1, B29C 3938

Patent

active

049922203

ABSTRACT:
A mixture of boiling water and a gelling agent, such as the polysaccharide agar, are mixed and poured into a mold and allowed to cool and gel. The gelled mixture is then removed from the mold and frozen, after which it is placed in a freeze drier where it is completely sublimated to remove therefrom all moisture. The resultant freeze dried material is extremely light in weight, is biodegradable, and exhibits favorable fire retardant properties.

REFERENCES:
patent: 3551535 (1970-12-01), Henderson et al.
patent: 4279812 (1981-07-01), Cioca
patent: 4312979 (1982-01-01), Takemoto et al.
patent: 4472542 (1984-09-01), Nambu
patent: 4849141 (1989-07-01), Fujioka et al.
patent: 4925603 (1990-05-01), Nambu

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