Film laminate with at least one diffusion-barrier layer and its use in vacuum insulation panels

摘要

At least one surface of the film laminate with at least one diffusion-barrier layer for production of a vacuum insulation panel has a heat-sealable layer, which comprises at least one sublayer of an additional diffusion-barrier layer composed of polyvinyl alcohol, in particular ethylene-vinyl alcohol copolymer (EVOH) within a multi-layer, preferably jointly extruded composite of the sealable-layer sublayers. The level of gas- and water-vapor-barrier effect provided by the high-barrier laminate can be significantly further increased, by a factor of about 2, by virtue of the additional diffusion-barrier layer integrated into the sealable layer.