To provide a heat insulating material capable of attaining required heat insulating performance and supplementing stiffness and shape-retention property of heat insulating layers by a shape retention member.
The heat insulating material 1 is equipped with a core material 10 having heat insulating layers 12, 13 and the plastic-deformable shape retention member 11 laminated on the heat insulating layers 12, 13, having higher stiffness than the heat insulating layers 12, 13 and a vacuum pack 20 for covering around the core material member 10 for tightly sealing inside in a vacuum state. The required heat insulating performance can be attained by the heat insulating layers 12, 13 and the stiffness and shape-retention property of the heat insulating layers 12, 13 can be complemented by the shape retention member 11.
Iwa Saki Kokuni
Kawamata Sumio
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu
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