Semi-finished products Plastic granules Special compounds

Thermal limitation usage of ZEDEX ® materialsAll plastics react to temperature variations with strong mateiral´s proprieties modification. Up to the glass transitiontemperature, the characteristics variation is relative low. Over the glass transition temperature, proprietiesvariations should be considered. A 20 % overstepping of the glass transition temperature could involve a reductionof 80% of the characteristics. At this point the material´s characteristics, determined at 20 °C, are not longervalid.Continuous service temperature (longterm)...or UL 746B Relative Temperature Index (RTI)represents a material characteristic. It dipends onthe thermoxidative stability of the polymer. During along-term overstepping, the plastic reacts with severeproperties modification, as e.g. colour change, andembrittlement to the complete chain destruction. Thishappens even without the action of factors as, e.g.pressure, friction, chemicals.Glass transition temperature...is the temperature, at which the amorphous structuresof the polymers lose their stability. The mechanicalcharacteristics of the amorphous polymers have astrong decay. Whereas the crystalline structure of thesemi-crystalline polymers has still got interconnections.If the temperature increases again, the crystallinestructures lose their strong interconnections andthe characteristics strong decay.Short term service temperature...may be temporarily admitted, however an earlycharacteristics changes has to be expected. The timelength depends on the operating conditions (e.g. atmosphere)and it lasts from 3 to max. 100 hours.ZX-100KZX-100EL63/55ZX-100MTZX-324ZX-324V1TZX-324V2TZX-324V11TZX-324VMTZX-410ZX-410V7TZX-530ZX-530CD3ZX-530EL3ZX-530KF15ZX-550ZX-550PVZX-750V5TZX-750V5KFshort-term service temp.long-term service temp.glass transition temp.50 100 150 200 250 300Temperature [°C]Figure 2: temperature limit use of the ZEDEX ® plasticsZEDEX ® basic typesZEDEX ® familiesPost heattreatmentMachiningShippingoverviewSterilizationChemicalresistance5