Dynamit Nobel Aktiengesellschaft

By Rudolf Wienand, Heir

Wilhelm Nachtigall

By Karl Wienand, Heir

By Elisabeth Wienand, Heir

By Anneliese Wienand, Legal Representative

By Hans-Jurg Wienand, Heir

Michael Wienand, Deceased

By Michael Wienand, Heir

Heinz Mewes

An improved process for incorporating glass fibers into a thermoplastic synthetic resin wherein the glass fibers are continuously mixed with a molten thermoplastic synthetic resin and the resulting mixture is shaped into a desired article, involves preheating the glass fibers to a temperature not more than the melting point of the synthetic resin, feeding the preheated glass fibers and the molten synthetic resin separately to a premixing chamber, intermixing the resin and fibers within the chamber and thereafter introducing the resultant premix continously and directly into a two-stage degasifying screw-type extruder for effecting further homogenization of the premix and for extruding the desired article. The two-stage degasifying screw-type extruder used for carrying out this process is provided with a screw having a constant screw pitch in the two stages and in each stage with a low pressure zone and a high pressure zone in succession.

Apparatus for the incorporation of glass fibers into thermoplastic

Growing community of inventors

Siegburg, Germany

By Rudolf Wienand, Heir