Importance

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Abstract

A vacuum insulation panel includes two laminate films each having at least a gas barrier layer and a sealant layer, a core material sealed at a reduced pressure between the two laminate films disposed so that the sealant layers may be opposite to each other, and a sealing joint extending from the inner peripheral edge of the two laminate films to an outer peripheral edge defining a joint width, where the sealant layers are fused to each other so as to surround the whole circumference of the core material. The sealing joint has at least one constricted section with a thickness of the fused sealant layers which is lower than the thickness of the non-constricted fused sealant layers extending essentially parallel to the edges. The constricted section/s is/are arranged at the outer peripheral edge and/or at the inner peripheral edge of the two laminate films.

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First Claim