To provide a vacuum heat insulating material efficiently manufacturable by eliminating adsorbed moisture in a core material in a short time without degrading heat insulating performance in the vacuum heat insulating material manufactured through a drying process for eliminating a trace of moisture adsorbed in the core material formed of an inorganic fiber assembly mainly composed of inorganic fiber.
This vacuum heat insulating material is formed by packing the core material formed of the inorganic fiber assembly mainly composed of inorganic fiber obtained by a wet method or a dry method, in an outer material and carrying out evacuation. Dielectric heating treatment such as high frequency heating or microwave heating is applied to the core material to eliminate the trace of moisture adsorbed in the inorganic fiber due to a moisture adsorbing phenomenon, and then evacuation is carried out while preventing readsorption of moisture.
KATAGIRI YUJI
| JPH07139691A | 1995-05-30 | |||
| JPH1064488A | 1998-03-06 |
Shinichi Abe
Yuji Tsujida
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