METHOD FOR PRODUCING MULTI-LAYER PIPE CONDUIT COMPONETS OF PLASTIC MATERIAL, INORGANIC FILLER MATERIAL AND GLASS FIBERS, AND PIPE CONDUIT COMPONENT PRODUCED BY THE STATED METHOD

摘要

For the purpose of forming individual layers, a free-flowing mixture of an inorganic filler powder and a polyester resin is fed to a rotating die. By selecting the speed during the formation of the layers, a greater or lesser degree of separation to match the intended purpose of the conduit part is created in the layer. Thereafter, the layer of chopped glass fibres is fed in, which can penetrate at least into the inner layer portion which has become richer in resin. Thanks to this speed-controlled filler/resin distribution in the layers, less glass is required to achieve high strengths in the layers. Use of carbon-containing fillers avoids strain corrosion. ……