Ekstrusiooni, survevalu v?i puhumisvormimise teel saadud plastist toru, liitmik v?i profiilelement vedelike ning pastataolise v?i gaasilise aine jaoks m?eldud torustike valmistamiseks ja meetod plasttoru keskmise kihi sideaine valmistamiseks

摘要

An extruded, injection molded or blow molded pipe, fitting or component of synthetic plastics comprises a tubular body (1). The tubular body has inner and outer layers of a base material, and an intermediate layer of a base material with additive(s). The inner and intermediate layers consist of a polymeric material, which has additives against aggressive media. An extruded, injection molded or blow molded pipe, fitting or component of synthetic plastics comprises a tubular body composed of at least three layers. The three layers are inner and outer layers (2, 3) of a base material, and an intermediate layer (4) of a base material with additive(s). The inner and intermediate layers consist of a polymeric material. The polymeric material has additives against aggressive oxidizing and reduction media. The media are built into the amorphous regions of the part-crystalline polymer material of the inner layer. Filling materials and/or additives are worked into the amorphous regions of the polymer material of the intermediate layer as barrier materials for reducing a migration of the additives from the inner layer into the outer layer. The filling materials and/or additives and the polymer material constitute a composite material of the intermediate layer. An Independent claim is also included for a method for producing a starting material for the intermediate layer of the plastic pipe, fitting, or component.