《PET吹瓶介绍》PPT课件.ppt

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1、PET簡介I.CKuo2002/12/11分子量192*n+62n为聚合度，一般为100~160聚酯的性质结构式HOCH2CH2OOCOCH2CH2OOCCOCOn-1OCH2CH2OH聚对苯二甲酸乙二酯英文名称中文名称Polyethyleneterephthalate简称PET玻璃化温度Tg无定形67℃结晶81℃高顺向（取向态）结晶125℃熔点Tm般240~265℃纯结晶271℃密度g/cm3无定形1.334结晶1.455熔体270℃1.220295℃1.117吸水率温度25℃,相对湿度65%一星期含水0.4%温度25℃,

2、浸水中一星期含水0.5~0.8%折射率2℃2.4825℃1.64干燥不良对制品的影响IV下降强度下降、破裂黄颗未熔物气泡白雾拉丝PETCHIPS干燥风温（进口、出口、冷却后）风量露点干燥时间死角均匀性漏气桶槽堆积密度860Kg/m3冷却过滤风机加热分子筛分子筛加热TITID.PFI除湿PET干燥图PET注塑成型瓶胚成型的过程加料熔融射出保压冷却成型CoreHopperPreformCavityScrewNozzlebarrel挤出机挤出机螺杆瓶胚注射Co-InjectionProcessOptimizationBARRIER

3、LAYERVELOCITYPROFILECavityCoreWhatDoConvertersWant?OperatingefficiencyequaltomonolayerCycletimeequaltomonolayerMachinesizeandmoldsizeequaltomonolayerEaseofoperationandprocesscontrolEconomicaluseofbarriermaterialsaslowas2%Uniformdistributionaroundleadingedgeofbarrie

4、rPreformswithBarrierPCRPCRandbarrierWhatisMulti-Layer?MonolayerPETBottleMultilayerPETBottleShortshelflifeExtendedshelflifeThreeLayersPETBarrierPETOneLayerPETOnlyMULTI-LAYER–2Material,3LayersTurnkeyPETCo-InjectionSystemsCoreSkinKortecMeltDeliverySystemGatesKortecCo-

5、InjectionNozzlesXXXXOtherTechnology3-LAYERFLOWOtherTechnology3-LAYERFLOWBIASEDFLOW15%EVENLYDISTRIBUTEDFLOWOtherTechnology3-LAYERFLOWv=1.25vv=1.62v12lOtherTechnology3-LAYERFLOWKortecTechnology3-LAYERFLOWKortecTechnology3-LAYERFLOWBIASEDFLOW15%EVENLYDISTRIBUTEDFLOWKo

6、rtecTechnology3-LAYERFLOWlKortecTechnology3-LAYERFLOWSIMPLEBARRIERLAYERADJUSTMENTSSimultaneousinjectionThreeparametersadjustbarrierlayerdistribution1.)Leadingedge2.)Trailingedge3.)Layerthickness123Co-InjectionProcessOptimizationKORTECOTHERCombinelayersremotefromgat

7、eStandardmoldsizeStandardmachinesizeCombinelayersclosetocavityNon-standardmoldsizeNon-standardmachinesizeNozzleTechnologyThree-LayerInjectionProfileTIMEPOSITION“A”InjectPETonlyASimultaneouslyinjectPET&barrierTIMEPOSITION“B”BThree-LayerInjectionProfileCompleteinject

8、ionofbarrierContinuePETinjectionTIMEPOSITION“C”CThree-LayerInjectionProfileTIMEPOSITION“D”DFinishPETinjectionensuringgateissealedwithPETonlyandno