Biodegradable cryogenic bag
AssigneeCortec Corporation
InventorsBoris A. Miksic, Robert A. Boyle
Life of this patent
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Abstract
A vessel for retaining cryogens in the form of a flexible liner for compliably retaining a cryogen and designed for controlled release of vapors generated by the cryogen. The improved flexible liner is biodegradable, with the incorporation of the biodegradable component within the resin being accomplished without adversely affecting the properties of the film at cryogenic temperatures. A preferred biodegradable film consists of a polyester comprising butane 1,4-diol and adipic acid to which a controlled quantity of terephthalic acid has been added.
Claims11
In combination with a vessel adapted for receiving cryogens and adapted for the controlled release of a gaseous emission from a cryogen retained therewithin;
- a flexible liner for compliably retaining said cryogen within said vessel, said flexible liner being characterized in that:
- (a) said flexible liner consists of a biodegradable polyester film with the property of retaining flexibility at cryogenic temperatures as low as about −210° C.;
- (b) said biodegradable polyester resin being biodegradable following exposure to cryogenic temperatures.
A flexible bag adapted for receiving cryogens and adapted for the controlled release of a gaseous emission from a cryogen retained therewithin;
- a flexible bag for compliably retaining said cryogen, said flexible bag being characterized in that:
- (a) said flexible bag consists of a biodegradable polyester film with the property of retaining flexibility at cryogenic temperatures as low as about −210° C.;
- (b) said biodegradable polyester film being biodegradable following exposure to cryogenic temperatures.
A flexible bag adapted for receiving cryogens and adapted for the controlled release of a gaseous emission from a cryogen retained therewithin;
- a flexible bag for compliably retaining said cryogen, said flexible bag being characterized in that:
- (a) said flexible bag consists of a biodegradable polyester film consisting of the reaction product of butane 1,4-diol and a blend of adipic acid and an aromatic polyacid, with the reaction product having a density ranging from between 1.2 and 1.5 g/mm2 and a melting point ranging from 100 and 130° C., said flexible bag retaining flexibility at cryogenic temperatures as low as about −210° C.;
- (b) said biodegradable polyester film being biodegradable following exposure to cryogenic temperatures.
Dependencies are inferred from the claim text.