| 摘要 |
<p>PURPOSE: To maintain a stable heat insulating condition for over a long period by suppressing gas leak due to deterioration along with the lapse of time. CONSTITUTION: A vacuum heat insulation material 1 is provided with a sealing area by heat fused layer which is formed between a high gas barrier foil 9 and a high gas barrier foil 9 by forming a bag out of a heat fusing resin compound layer 11 stuck on the surface of a high gas barrier foil 9 set inside, inserting a core material 3 into the bag, reducing a pressure in the bag, and heat-fusing the periphery part of it. Then the sealing area by heat fused layer is provided with at least an inner side heat fusing resin compound layer 11 and an outer side heat fusing resin compound layer 17 of which gas permeability is different from each other.</p> |
