HEAT INSULATING LAMINATE
First Claim
2. A heat insulating layer comprising one aluminum foil and two thermoplastic resin films and the resin films being bonded to both surfaces of the metal foil at A number of bonding points uniformly and deviatively distributed throughout the surfaces of the metal foil characterized by the resin films being tightened and the metal foil being wrinkled to form a number of spaces between the resin films.
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Accused Products
Abstract
At least one metal foil and at least one thermoplastic resin film are bonded at a number of bonding points uniformly distributed throughout the surface to obtain heat insulating material. The heat insulating material is heated to cause shrinkage of the resin film and wrinkles of the metal foil whereby air spaces between the metal foil and the resin film are formed to obtain heat insulating layer.
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Citations
4 Claims
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2. A heat insulating layer comprising one aluminum foil and two thermoplastic resin films and the resin films being bonded to both surfaces of the metal foil at A number of bonding points uniformly and deviatively distributed throughout the surfaces of the metal foil characterized by the resin films being tightened and the metal foil being wrinkled to form a number of spaces between the resin films.
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3. A heat insulating material comprising one heat-shrinkable thermoplastic resin film and two metal foils characterized by the metal foils being bonded to both surfaces of the resin film at a number of bonding points uniformly distributed throughout the both surfaces of the resin film.
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4. A heat insulating layer comprising one thermoplastic resin film and two metal foils and the metal foils being bonded to both surfaces of the resin film at a number of bonding points uniformly distributed throughout the surfaces of the resin film characterized by the resin film being tightened and each metal foil being raised and wrinkled between the bonding points.
Specification