Thermal insulator
AssigneesMatsushita Electric Industrial Co., Ltd., Matsushita Reiki Co., Ltd.
InventorsRyoichi Yamamoto, Yoshihiro Matsuo, Masanari Mikoda, Yoshihiro Asada
Life of this patent
Estimating the term…
Abstract
A thermal insulator comprises an expanded resin body having embedded therein an evacuated powder insulation portion which consists of fine powder and a container of film-like plastics or a film-like composite of plastics and metal for enclosing the powder. The resin body has been expanded by a Freon gas as a blowing agent. Since a Freon gas has a larger molecular diameter than the constituent gases of air, it is less likely to permeate through the container than air. Thus present invention provides a novel composite insulator which fully utilizes the benefits of vacuum insulation without necessitating a strong and costly material for a vacuum container.
Claims6
A thermal insulator comprising an expanded resin body having embedded therein at least one evacuated powder insulation portion, said insulation portion comprising fine powder and a film-like flexible container enclosing said powder.
Dependencies are inferred from the claim text.