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Sealing technology manual for the process industry - Overview of engineering plastics

Engineering plastics Engineering plastics have properties that make them ideal for a variety of applications in the process industry. The combination with other substances, such as reinforcing fibers, lubricants or other polymers, can significantly ex- pand the range of possible applications. It should be noted that thermoplastics, depending on their sophistication, have very different performance limits with respect to temperature, pressure resistance and chemi- cal resistance, which should be taken into account when it comes to their application. Properties of thermoplastics • Low density • Chemical resistance • High resistance to wear • Excellent electrical properties • High energy input capacity • Very good processing properties PA/POM • –40 °C to +100 °C (–40 °F to +212 °F) • Limited chemical and pressure resistance PEEK • –100 °C to +260 °C (–148 °F to +500 °F) • Good chemical resistance • Highest pressure resistance PTFE • –250 °C to +250 °C (–418 °F to +482 °F) • Highest chemical resistance • Good pressure resistance Chemical resistance Pressure resistance PA/POM PEEK PTFE Temperature resistance in °C 260 130 0 –130 –260 OVERVIEW OF ENGINEERING PLASTICS 48

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