Polypropylene rod PP® series

Due to its thermal and mechanical properties, this semi-crystalline material belongs to the polymer group of standard plastics. It has a good rigidity and hardness. PP is not prone to stress cracking. At temperatures below zero, however, significant embrittlement occurs. Polypropylene shows a high mechanical strength and a tensile strength, but a low notched impact strength. PP resists stress cracking and it is easy to weld. At minus temperatures it can get brittle. The chemical and electrical properties are very good. The continous operating temperatures ranges between +5 °C and +100 °C. The 30 % glass fibre reinforced PP has an improved dimensional stability, very high stiffness and high heat resistance that opens up additional applications. In the context of new technical developments we have extruded a white coloured PP-HT material, which is particularly suitable for applications in the chemical industry and for thermally demanding applications. GEHR PP-HT® is a new material that has a heat deflection temperature (HDT/B=133 °C) which is approximately 40 °C higher than that of standard PP without losing its high chemical resistance. The melting point of PP HT is approximately 165 °C. It was possible to significantly enhance the mechanical properties of this homopolymeric material, which expands the field of application for the use of a polyolefin. Due to its thermal and mechanical properties, this semi-crystalline material belongs to the polymer group of standard plastics. It has a good rigidity and hardness.