Heat insulating material and method for producing same

Details Heat insulating material and method for producing same Heat insulating material and method for producing same

1994-07-19

1996-11-19

Yoder, Michele K.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156213, 156214, 264321, 521174, B32B 3104, B32B 300

Patent

active

055758711

ABSTRACT:
The heat insulator of this invention comprises a thermoformed open cell rigid polyurethane foam core enclosed in a gas barrier material and evacuated. The method of this invention comprises heating an open cell rigid polyurethane foam at a temperature not lower than the temperature at which its storage modulus of elasticity begins to decrease and enclosing the thus-thermoformed polyurethane foam in a gas barrier material and evacuating the interior of the enclosure. The heat insulator of the invention is highly heat-insulating and can be snugly applied to irregular surfaces.

REFERENCES:
patent: 3159700 (1964-12-01), Nakamura
patent: 3946039 (1976-03-01), Walz
patent: 4053341 (1977-10-01), Kleiner et al.
patent: 4510268 (1985-04-01), Tonokawa et al.
patent: 4668555 (1987-05-01), Uekado et al.
patent: 5312848 (1994-05-01), Klapper et al.
patent: 5318997 (1994-06-01), Okada et al.

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