Composite thermal insulator

Patent · Tue Jan 08 04:00:00 EST 1985

OSTI ID:5740427

Ishihara, Sh; Yamamoto, R; Yoneno, H

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/sup 0/ C. and a mechanical strength sufficient for actual use, with almost no variations with time in the heat insulating property.

• Assignee: Matsushita Electric Industrial Co. (Japan)
• Patent Number(s): US 4492725
• OSTI ID: 5740427
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360301* -- Composite Materials-- Preparation & Fabrication-- (-1987)
360304 -- Composite Materials-- Physical Properties-- (-1987)
ACTIVATED CARBON
ADSORBENTS
ATMOSPHERES
CARBON
CHEMICAL PREPARATION
COMPOSITE MATERIALS
COMPRESSION STRENGTH
CONTROLLED ATMOSPHERES
ELEMENTS
FREONS
HALOGENATED ALIPHATIC HYDROCARBONS
MATERIALS
MECHANICAL PROPERTIES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POWDERS
SYNTHESIS
SYNTHETIC MATERIALS
THERMAL CONDUCTIVITY
THERMAL INSULATION
THERMODYNAMIC PROPERTIES
WEIGHT