泰科纳POM S9363
泰科纳POMS9363---acetalcopolymergradeS9363isanimpactmodifiedgradefordemandingapplications.Hostaform®S9363providesgoodimpactstrengthwhileimprovingmodulusandweldlinestrengthoverstandardimpactmodifiedgradessuchasHostaform®S9064.ChemicalabbreviationaccordingtoISO1043-1:POM-HIPhysicalperformanceratingunitsystemtestmethodISO1183.38g/cmMVR(190°C/2.16kg)5.50cm3/10minISO1133Shrinkage:ISO294-4Verticalflowdirection1.6%ISO294-4Flowdirection1.8%ISO294-4Waterabsorption(saturated,23°C)0.80%ISO62MechanicalpropertiesratingunitsystemtestmethodTensilemodulus2000MPaISO527-2/1A/1Tensilestress(yield)50.0MPaISO527-2/1A/50Tensilestrain(yield)12%ISO527-2/1A/50Bendingmodulus(23°C)2000MPaISO178ImpactperformanceratingunitsystemtestmethodNotchedimpactstrengthofsimplysupportedbeamsISO179/1ea-30°C8.0kJ/m²ISO179/1eA23°C13kJ/m²ISO179/1eAImpactstrengthofISO/179simplysupportedbeam-30°CnofractureISO179/1eu23°CnofractureISO179/1euThermalperformanceratingunittestmethodHotdeformationtemperature0.45MPa,UNannealedat148°CISO75-2/b1.8MPa,UNannealedat84.0°CISO75-2/AMeltingtemperature1166°CISO11357-3LinearcoefficientofthermalexpansionISO11359-2Flow1.1e-4cm/cm/°CISO11359-2Transverse1.1e-4cm/cm/°CISO11359-2InjectionratingunitsystemDryingtemperature:80.0to100°CDryingtime:3.0HRThetemperatureatthebackofthebarrelis170to180°CThetemperatureinthemiddleofthebarrelis180to190°CTemperatureatfrontofbarrel180to190°CNozzletemperature180to200°CProcessing(melt)temperature180to200°CMoldtemperature:60.0to70.0°CInjectionpressure:60.0to120MPaSlowinjectionspeedHoldingpressure60.0to120MPaBackpressure:0.00to0.500MPa赛刚材料吸水率不高,所以采用铝箔防潮袋包装的POM料原则上可以直接用于注射成型,但对外观要求高的制品,最好经干燥后再进行成型。因为干燥处理可提高制品的表面光泽度,减少模垢、气痕等不良现象出现。而对开封并放置一定时间的POM料,会有一定的吸湿,所以必须经干燥后再用于成型,否则会在注射成型中产生较多的模垢,或者因产生银纹而使制品的外观不良。对POM进行注射成型时,为了达到较好的制品外观和减少成型时的模垢,要求其原料的含水率不超过0.1%。较高的干燥温度虽能使树脂烘干所需的时间大为缩短,但因过高的温度易使POM制品表面氧化变黄,所以最好采用较温和的干燥条件。均聚POM可采用的干燥温度为80~90℃,干燥时间为2~4h。共聚POM可采用干燥温度为90~100℃,干燥时间为2~4h。在干燥上的区别是因为共聚甲醛的吸湿率低于均聚甲醛,且热稳定性要好,所以采用高温烘烤。)