INSULATION PANEL COMPRISING A CO2 BARRIER FILM

摘要

This invention relates to an insulation panel which comprises a first wall, a second wall being a synthetic resin, and positioned between the first and second wall a foamed-in-situ polyurethane foam obtained in the presence of an expanding agent consisting substantially of carbon dioxide. The thermal insulation retention properties of the panel are significantly improved by the presence of a carbon dioxide diffusion barrier film interposed between the second wall and the polyurethane foam. The barrier film is a thermoplastic polyester resin which is a homo- or co-polymer adduct of an aromatic dicarboxylic acid and an active hydrogen-containing material.