| 摘要 |
A process for producing a foamed film from thermoplastic, preferably from polyethylene, polypropylene, polystyrene or the like, in particular from high molecular weight low pressure polyethylene (HPDE) and/or from medium molecular weight low pressure polyethylene (LDPE), in which a blowing agent is added to the plastics raw material and the plastics raw material containing blowing agent is extruded by means of a flat-film extruder or a tubular-film extruder, leads to a very thin and therefore economical, but at the same time highly tear- resistant final film, in that the plastics raw material is extruded so as to be multi-layered, and in that plastics raw material containing blowing agent is used in at least one layer and plastics raw material not containing blowing agent is used in at least one further layer. |
