Evacuated thermal insulation
OwnerRobert W. Barito, Mary O. Baritoinventors
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Abstract
Aluminum silicate or mixtures of aluminum silicate and silica are utilized as insulating materials with low thermal conductivities. The aluminum silicate or the mixtures are dried, compressed, placed in a gas-tight envelope, evacuated and sealed. The resultant rigid, board-like panel can be used directly as thermal insulation or it can be used in conjunction with other insulating materials, for example, polyurethane foam.
Claims13
A thermal insulation article comprising a composition of dried aluminum silicate and silica powder compressed into a predetermined form and sealed within an evacuated gas-tight envelope, said aluminum silicate and silica being present in amounts sufficient to cause the K factor of the article to be less than the K factor of an article when either powder in compressed form are present alone.
A thermal insulation material comprising dried particulate aluminum silicate and silica compressed into a composition having a density of between about 10 and 20 pounds per cubic foot, bounded by a microporous pouch, and sealed within a gas-tight envelope evacuated to no more than about 20 torr.
Dependencies are inferred from the claim text.