摘要:
The present invention relates to a method for producing a layered material, the layered material comprising a carrying layer and one or more further layers, wherein at least one of the further layers comprises thermally expandable microspheres, the method comprising attaching the layer comprising thermally expandable microspheres to another layer of the layered material, and thereafter expanding the microspheres. It also relates to a layered material comprising two or more layers of which one is a carrying layer, wherein at least one of the layers positioned under the carrying layer comprises expanded thermoplastic microspheres. It further relates to a composition for impregnating, or coating, a substrate, comprising thermally expandable microspheres.