泰科纳POMM25UV---M25UVisanacetalcopolymerdevelopedasanaturalUVlightstabilizedlowflow,highmolecularweightgrade.Ithasbeenformulatedasanaturalacetalthatdoesnotdiscolor,yetmaintainsprotectionfromUVlightexposure.PhysicalperformanceratingunitsystemtestmethodDensity:1.41g/cm?ISO1183Dissolutionvolumeflowrate(MVR)(190°C/2.16kg)2.20cm3/10minISO1133Shrinkage:ISO294-4Verticalflowdirection1.8%ISO294-4Flowdirection:2.2%ISO294-4WaterabsorptionISO62Saturated,23°C0.75%ISO62Balanced,23°C,50%RH0.20%ISO62MechanicalpropertiesratingunitsystemtestmethodTensilemodulus2500MPaISO527-2/1A/1Tensilestress(yield)62.0MPaISO527-2/1A/50Tensilestrain(yield)12%ISO527-2/1A/50Bendingmodulus(23°C)2400MPaISO178ImpactperformanceratingunitsystemtestmethodNotchedimpactstrengthofsimplysupportedbeam(23°C)8.5kJ/M?ISO179/1eaNotchedimpactstrengthofcantileverbeam(23°C)7.6kJ/M?ISO180/1AThermalperformanceratingunittestmethodHotdeformationtemperature(1.8MPa,UNannealed)93.0°CISO75-2/AMeltingtemperature1166°CISO11357-3LinearcoefficientofthermalexpansionISO11359-2Flow1.2e-4cm/cm/°CISO11359-2Transverse1.2e-4cm/cm/°CISO11359-2InjectionratingunitsystemDryingtemperature:80.0to100°CDryingtime:3.0HRThetemperatureatthebackofthebarrelis170to180°CThetemperatureinthemiddleofthebarrelis180to190°CTemperatureatfrontofbarrel180to190°CNozzletemperature190to200°CProcessing(melt)temperature180to200°CMoldtemperature:80.0to120°CInjectionpressure:60.0to120MPaSlowinjectionspeedHoldingpressure60.0to120MPaBackpressure:0.00to0.500MPa)