泰科纳POM***0---Celconacetalcopolymergrade***0™isamediumviscositypolymerprovidingoptimumperformanceingeneralpurposeinjectionmoldingandextrusionofthinwalledtubingandthingaugefilm.Thisgradeprovidesoverallexcellentperformanceinmanyapplications.ChemicalabbreviationaccordingtoISO1043-1:POMPleasealsoseeHostaform®C9021.PhysicalperformanceratingunitsystemtestmethodSpecificgravity:1.41g/cm?ASTMD792,ISO1183Meltflowrate(meltflowrate)9.0g/10minASTMd1238MVR(190°C/2.16kg)8.00cm3/10minISO1133ShrinkageFlow2.2%ASTMD955Transverseflow1.8%ASTMD955Verticalflowdirection1.9%ISO294-4Flowdirection:2.0%ISO294-4WaterabsorptionISO62Saturated,23°C0.75%ISO62Balanced,23°C,50%RH0.20%ISO62MechanicalpropertiesratingunitsystemtestmethodTensilemodulusofISO276527MPaTensilestrengthYield,-40°C-94.5MPa-ASTMD638Yield,23°C60.7MPaASTMD638Yield,71°C34.5MPaASTMD638Yield66.0MPaISO527-2/1A/50Tensilestrain(yield)10%ISO527-2/1A/50TensilecreepmodulusISO899-11hr2450MPaISO899-11000hr1350MPaISO899-1Bendingmodulus(23°C)2550MPaISO178ImpactperformanceratingunitsystemtestmethodNotchedimpactstrengthofsimplysupportedbeamsISO179/1ea-30°C6.0kJ/m²ISO179/1eA23°C6.0kJ/m²ISO179/1eANotchlessimpactstrengthofsimplysupportedbeamsISO179/1eu-30°C180kJ/m²ISO179/1eU23°C190kJ/m²ISO179/1eUNotchedimpactstrengthofcantileverbeam(23°C)5.7kJ/M?ISO180/1A韩国工程塑料POM均聚甲醛1959年发明，由甲醛溶液与***反应，经过脱水、热裂解得到精制甲醛，然后在催化剂作用下进行液相聚合，聚合后用醋酐酯化封端。均聚甲醛的结晶度高，分子量分布较窄。其产品相对密度约为1.4，熔点为170-185℃，特点是有优异的刚性，拉伸强度可达68.9MPa，具有优异的刚性，拉伸强度高，单位质量的拉伸强度高于锌和黄铜，接近钢材，而且耐磨性能好、耐疲劳强度和蠕变性均好，摩擦系数小，但是热稳定性差、不耐酸碱。目前均聚甲醛约占聚甲醛总产量的20%。)