Ganter Norm Standard Parts - Catalogue Page 2162
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Material Characteristics of Plastics Materials and Elastomers continued Technopolymer Symbol PC PP GF20 PSU PTFE Description Polycarbonate Polypropylene Polysulfon Polytetra- Yield stress in MPa 63 33 with 20% glass fibre fluorethylene 70 4 Tensile strength in MPa – – 70 20 Tension-E-Module in MPa 2400 2900 2400 600 Ball indentation hardness in MPa 110 80 147 (H358/30) 26 Temperature resistance: • max. short-term • max. long-term • min. application temp. 140 °C 125 °C –100 °C 140 °C 100 °C 0 °C 180 °C 160 °C –100 °C 300 °C 260 °C –200 °C Resistance to: * • Oil, greases • Solvents: Tri Per • Acid: weak strong • Alkalines: weak strong • Petrol • Alcohol • hot water • UV light / weather exposure o – – + – – – – o – o + o o + + + + + + + o + o o o o + + – + + - + + + + + + + + + + + V-2 Polycarbonates (amorphous) are translucent plastic materials with following properties: – Propylenes (partially crystalline) are universal standard plastic materials with balanced property levels: V-0 V-0 The primary feature of Polysulfon is its very high heat resistance and good resistance to chemicals. Polytetrafluorethylene is characterized in particular by very low friction coefficients and very high chemical and thermal resistance. Fire behaviour (UL 94) General High strength, in particular high impact resistance, good optical properties, selfextinguishing. but: sensitive to chemicals and stress cracking, not suitable for high dynamic stress loads, notch sensitive at edges and corners. Average strength, stiffness, impact resistance, low density, excellent chemical resistance but very bad cold temperature properties. Embedded glass fibre, e.g. PP GF20, enhances stiffness and strength. Typical fields of application are electrical engineering, electronics, mechanical engineering, and medical technology where high heat resistance is needed, while also allowing transparency. PTFE is a preferred material for friction bearings, guides, seals, anti-stick coatings and insulators. Typical applications for propylenes are armatures. * + resistant, o conditionally resistant, – non-resistant Material Characteristics | Page 2161
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