Thermal insulator

Details Thermal insulator Thermal insulator

1981-12-03

1985-07-16

Thomas, Alexander S.

Stock material or miscellaneous articles

Sheet including cover or casing

Filled with gas other than air; or under vacuum

428 71, 428 76, 4283055, 4283166, 220421, B32B 106

Patent

active

045296383

ABSTRACT:
A thermal insulator comprises an expanded resin body having embedded therein an evacuated powder insulation portion which consists of fine powder and a container of film-like plastics or a film-like composite of plastics and metal for enclosing the powder. The resin body has been expanded by a Freon gas as a blowing agent. Since a Freon gas has a larger molecular diameter than the constituent gases of air, it is less likely to permeate through the container than air. Thus present invention provides a novel composite insulator which fully utilizes the benefits of vacuum insulation without necessitating a strong and costly material for a vacuum container.

REFERENCES:
patent: 3264165 (1966-08-01), Stickel
patent: 3769770 (1973-11-01), Deschamps et al.

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