Coated foam boards

摘要

Foam plate (I) comprises a cell-gas with lower thermal conductivity than air, where all the side of (I) is coated with a polymer film containing polyamide, polyvinylidene chloride, polyethylene vinyl alcohol, polyvinyl acetate or polyacrylonitrile. An independent claim is included for the preparation of (I) comprising coating the foam core with the polymer film by single or multiple rolling, immersing or spraying with a polymer solution or polymer dispersion.