procedure for the manufacture of a rohrstueckes and then produced verbundrohr.

摘要

1. Process for the manufacture of a tubular element (1) in a rotating mould drum (2) in which the tube wall is formed by the introduction of liquid plastics as well as of filler materials and/or reinforcing materials to build up a layer of material on the inner wall of the moulding drum, wherein the tube wall is constructed by the successive formation of layers (4-10) both of plastics and also of inorganic materials, characterised in that at least one inorganic material layer is applied as central layer (7) and two or more plastics layers (4-6) and (8-10) are applied as outer wall region and inner wall region and are connected with the central layer by the plastics layers (6, 8) adjacent them.