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industrial control elements metal control elements locks standard plastic parts cover and protective elements

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technical information about materials		Overview Materials
Overview Materials Contact Bäcker GmbH & Co KG Plastic - Metal - Standard Elements Tel.: +49 (27 53) / 59 50 - 0 Fax: +49 (27 53) / 59 50 - 44 Fax: +49 (27 53) / 59 50 - 45 Fax: +49 (27 53) / 59 50 - 46		Technical information about materials The specific material properties of plastics offer new and cost-effective design possibilities. Plastic products such as plastic nuts or screws have a great number of advantages, including electrical insulation, low weight, elasticity, toughness, scratch resistance, resistance to corrosion, chemicals and the influence of the weather.The color of plastic parts can also be matched to that of the finished product. Polyamide 6 and 6.6 Very good mechanical properties in regard to tensile characteristics, fatigue, shocks, friction and wear. Very good resistance to solvents: petroleum, lubricating oils, petrol, benzene, acetone, trichloroethylene, petroleum ether. Not affected by the majority of acids in the dilute state. Hardly flammable to self-extinguishing. Polyamide 6 and 6.6 GF In contrast to PA 6 and 6.6, the properties of these materials are enhanced in the following areas for the most part: superior mechanical behavior in respect of tension and bending (low shock value), better thermal behavior. High-pressure polyethylene HP-PE Excellent electrical insulation, low loss factor, high resistivity and resistance to changes in shape, does not affect foodstuffs, low coefficient of friction. Polyacetal POM Good chemical behavior, good mechanical properties (fatigue resistance). Very good long-term dimensional stability, not affect by mold fungus or storage in the soil. Physical properties Units PA6 PA6 GF PA6.6 PA6.6 GF ND-PE HD-PE Specific weight g/cm3 1,14 1,35 1,13 1,35 0,92 0,95 Tearing resistance MPA 40 95 55 140 8 20 Elongation at tear % 250 7 220 6 1000 1000 Elasticity module MPA 1300 6500 1800 7200 500 1100 Notch value kJ/m2 30 40-60 15-25 10-18 - 5 Indentation hardness MPA 75 110 80 170 30 28 Long-period service temperature °C 80-100 90-120 80-120 100-140 60-80 70-90 Short-period service temperature °C 140-170 170-190 170-200 170-240 80-90 90-110 Specific volume resistance Ohm x cm 1012 1012 1012 1012 1017 1017 Percussion strength kV/mm 60 70 80 75 150 150 Physical properties Units PP PS ABS PC POM Specific weight g/cm3 0,90 1,05 1,05 1,20 1,14 Tearing resistance MPA 20 45 32 >55 65 Elongation at tear % 800 4 30 110 70 Elasticity module MPA 1200 3200 2500 2300 3000 Notch value kJ/m2 3-20 2-3 5-20 20-35 4-10 Indentation hardness MPA 36-90 150 50-95 110 160 Long-period service temperature °C 90-100 50-80 70-90 100-130 90-110 Short-period service temperature °C 100-140 60-90 80-100 135 110-150 Specific volume resistance Ohm x cm 1017 1016 1016 1016 1015 Percussion strength kV/mm 100 135 120 25-35 120 Information based on our present state of knowledge is only intended to help you in the choice of material and possible applications. The properties of the materials listed were communicated to us by the manufacturers. They do not represent any guarantee of specific properties. The user must subject our products to his own tests before use. This also applies in particular to the suitability of a material for a specific application. The same applies analogously to our other information and advice on technical applications by word of mouth or in writing. Our General Terms of Sale and Delivery apply otherwise.

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