Standard_Parts_Catalogue

Page 2164 | Material Characteristics Elastomers Symbol MVQ, VMQ PUR TPE Trade name Elastosil ® Bayflex ® Santoprene ® Chemical description Silicone rubber Polyurethane Thermoplastic elastomer Hardness (Shore A) 3 ... 90 65 … 90 55 … 87 Temperature resistance • short-term • long-term –50° ... +250 °C –30° ... +200 °C – 40° … +130 °C – 25° … +100 °C – 40° … +150 °C – 30° … +125 °C Tensile strength in N/mm 2 12 20 8,5 Wear resistance / Abrasion resistance good excellent good Resistance to: * • Oil, greases • Solvents • Acid • Alkalines • Petrol • UV light / weather exposure o o - - o + + o - - + + + + + + + + General MVQ offers very good mechanical properties over a very wide temperature range with satisfactory oil resistance. In comparison with other elastomers, MVQ has exceptionally high purity and is therefore used in particular in food and pharmaceutical applica- tions. PUR is known for exceptio- nally good mechanical characteristics with very good resistance to atmospheric and environ- mental influences. In addition, the extreme resistance to tearing and to wear, should also be mentioned. TPE is a thermoplastic rubber, the performance characteristics of which are comparable to those of many customary vulcani- sed special rubbers. TPE is a multi-purpose material with outstanding dynamic fatigue strength and excellent resistance to ozone and atmospheric influences (environmental influences). * + resistant, o conditionally resistant, – non-resistant Material Characteristics of Plastics Materials and Elastomers continued