MATERIAL WEB CONSISTING OF TWO OR SEVERAL THERMOPLASTIC PLASTICS MATERIALS OF DIFFERENT KIND AND/OR PROPERTIES, FOR EXAMPLE IN THE FORM OF FOILS FOR PACKING PURPOSES OR FOR THE PRODUCTION OF SHAPED ARTICLES, AND PROCESS AND DEVICE FOR THE PRODUCTION OF MATERIAL WEBS OF THIS KIND

摘要

A combination matl. for e.g. double - walled container, consists of different strips bonded together longitudinally. Each strip itself consists of two thermoplastics e.g. an upper high impact polystyrene and a lower standard polystyrene with anti - static additive layer in one strip, and an upper polyethylene and lower heat - resistant polystyrene in the next strip. The strips are heat - formed so that, for example, the first produces the outer wall and the second strip produces the inner lining of a container.