Composite thermal insulator

Details Composite thermal insulator Composite thermal insulator

1983-07-18

1985-01-08

Thomas, Alexander

Stock material or miscellaneous articles

Sheet including cover or casing

Filled with gas other than air; or under vacuum

428 76, 428323, 428402, 428403, B32B 516, B32B 518

Patent

active

044927258

ABSTRACT:
The disclosure is directed to a composite thermal insulator including a Freon gas expanded plastic, and an evacuated powder insulation. The present invention provides a composite thermal insulator light in weight and having a superior heat insulating performance over a long period through replacement of a thick metallic container conventionally used for the evacuated powder insulation and considered indispensable for withstanding a load at one atmospheric pressure and for preventing vacuum leakage, by a film-like plastic container, with activated carbon disposed in it.
More specifically, the composite thermal insulator of the present invention includes a Freon gas expanded plastic, a film-like plastic container evacuated to form a vacuum in its interior, and directly contacting and/or covered by the expanded plastic, and activated carbon or inorganic powder containing activated carbon tightly enclosed in the plastic container, light in weight, having a heat conductivity lower than 0.01 kcal/mh.degree.C. and a mechanical strength sufficient for actual use, with almost no variations with time in the heat insulating property.

REFERENCES:
patent: 3264165 (1966-08-01), Stickel
patent: 3850714 (1974-11-01), Adorjan

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