Patent ID: 7449227
Filing Date: 2008-11-11
Classification: F16L,Y10T

Abstract:
1. A vacuum insulation panel comprising: a core including an inner film bag made of polyethylene film in which a flexible inorganic fiber laminate that does not include a binder is accommodated in a compressed state, and an outer barrier bag which includes a heat-welding polyethylene film layer on its inner surface and a metallic layer on its outer surface, has a gas-barrier characteristic and accommodates the core including the inner film bag, wherein; an interior of the outer barrier bag has been depressurized and sealed to provide a unified edge comprising a portion in which edge portions of the outer barrier bag and edge portions of the inner film bag are heat-welded together, and the edge portions of the outer barrier bag are folded back, together with the edge portions of the inner film bag, at least at the unified edge along an end surface of the core in a manner not to allow a convection space to be formed between the outer barrier bag and the core, wherein corners formed by edge lines at ends of the core are round having been pressed by the outer barrier bag when the interior of the outer barrier bag was depressurized.