MATÉRIAU D'EMBALLAGE EXTERNE DE MATÉRIAU D'ISOLATION SOUS VIDE, MATÉRIAU D'ISOLATION SOUS VIDE, ET ARTICLE DOTÉ D'UN MATÉRIAU D'ISOLATION SOUS VIDE

摘要

The main object of the present invention is to provide a vacuum insulation material outer packing material capable of forming a vacuum insulation material that can maintain insulating properties for a long period of time even in an environment with high temperature and high humidity. The present invention achieves the objective by providing a vacuum insulation material outer packing material comprising a thermally weldable film and a gas barrier film, characterized in that: the gas barrier film comprises a resin substrate, and a barrier layer disposed at least one surface side of the resin substrate; and when setting a dimension of the vacuum insulation material outer packing material under an atmosphere having a temperature of 25°C and a humidity of 0%RH as a reference, a dimension change rate of the vacuum insulation material outer packing material being 0.8% or less after the vacuum insulation material outer packing material is held for 2 hours under an atmosphere having a temperature of 70°C and a humidity of 90%RH.