POMLZ750旭化成--ForhomopolymerPOMorcopolymerPOM,theinjectionspeedshouldbefasterwhenmoldingthin-walledormultic***ityproducts.Thisisbecausetheinjectionmoldingofsuchpartsrequiresthesystemtoh***eagoodflowperformance.Asmentionedabove,POMmeltisashearsensitivepolymer.Toincreasetheflowperformance,theinjectionspeedcanbeincreased.Atthesametime,intheaboveapplicati***,thecoolingrateofPOMcrystalwillbeveryfast,andthesurfacedefectssuchaswrinkles,stripesandweldlineswilleasilyoccurontheproducts.Therefore,itisnecessarytoimprovetheinjectionspeed.Whenmoldingtheproductswithlargerwallthickness,aslightlyslowerinjectionspeedcanbeusedtopreventthegaswrappedinthematerialfromeffectivelydischargingduetothetoofastinjectionspeed.Relativelyspeaking,theinjectionspeedofhomopolymerPOMishigherthanthatofcopolymerizedPOM.Lz750physicalpropertytableBasicperformanceratingunittestmethodDensity1.39g/cmISO1183Meltflowrate(190℃/2.16kg)30g/10minISO1133TestmethodofphysicalperformanceratingunitMoldingshrinkageISO294-4(AcrossFlow)1.6-2%(Flow)1.6-2%Mechanicalproperties-ratingunits-TestmethodsTensilemodulus2800MPaISO527-2Tensilestressatbreak63MPaISO527-2Tensilestrainatbreak20%ISO527-2Charpynotchedimpactstrength(20℃)4kJ/MISO179/1eaThermalperformanceratingunittestmethodHotdeformationtemperature(0.45MPa,unannealed)157℃ISO75-2/B(1.8MPa,unannealed)100℃ISO75-2/AFlameretardantgradeHBUL94)