西得乐PET瓶工艺

西得乐的热定型工艺SidelHeatSetTechnology适用于敏感饮料Forsensitivebeverages主讲人：兰尼先生ConductedbyMr.LudovicLAINEPET耐热瓶、无菌灌装及ACTISTM等离子工艺与应用技术交流会SIDELTECHNICALCONFERENCEONHR-BOTTLE，ASEPTICANDACTISTM2001年12月4、5日DECELMBER4TH&5TH,2001中国上海Shanghai,CHINA应用领域Applications适用于包装各类敏感饮料,如Forthepackagingofsensitivedrinkssuchas:果汁Fruitjuices茶Teas健康饮料Isotonicbeverages其它饮料等etc...Titles基本原理热定型的基本原理单轮吹塑工艺轻体瓶线性结晶炉西得乐热灌装设备在亚洲的分布情况西得乐在亚洲的联络方法BasicPrincipleHeatSetfundamentalsOnewheelTechnologyLightweightingLinearcrystalovenReferencesinAsiaContactsinAsia基本原理Basicprinciple主要工艺参数Mainparameters当前的灌装方式Currentfillingmethods:•非连线热灌装Offlinehotfilling•连线吹瓶、灌装Integratedblowingandfillingoperation热灌装瓶的热应力和机械应力Thermalandmechanicalstressesforhotfilledbottles•膨胀,继而负压变形Inflationthencollapsing•局部变形Localdeformation•收缩Contraction主要工艺参数Mainparameters灌装温度Fillingtemperature灌装水平Fillinglevel瓶子的存储条件(湿度,温度,时间等)Bottlestorageconditions(RH,Temperature,time...)瓶子的输送条件(顶压,侧压等)Bottlehandlingconditions(Verticalload,sideload...)隔氧性能O2barrier抗紫外线性能U.V.barrier抗真空性能Vacuumresistance热定型程度Degreeofheatsetting瓶口的设计Neckdesign热定型的程度Degreeofheatsetting吹瓶机的产量Bloweroutput瓶子的重量及设Bottleweight&design与吹瓶及灌装有关的工艺参数PARAMETERSLINKEDTOTHEBLOWINGANDFILLINGOPERATION:具体说明SPECIFICATIONS:{{与产品有关的工艺参数PARAMETERSLINKEDTOTHEPRODUCT:非连线灌装Offlinefillingoperation生产参数Parameters:•产量Output•模温Moldtemperature•生产条件ProcessConditions运输Transport灌装+封盖Filling+Capping冷却COOLING码垛PALLETIZING•湿度RH•存放时间Time•存放温度°C•垂直负荷Topload•灌装温度Fillingtemperature•旋盖钮力Torque•真空Vacuum•冷却时间Time•液面高度Fillinglevel•垂直负荷Verticalload制瓶厂BOTTLEPRODUCTIONPLANT灌装厂BOTTLEFILLINGPLANT•湿度RH•存放时间Time•存放温度°C•垂直负荷Topload连线吹瓶、灌装Integratedblowingandfillingoperation灌装+封盖Filling+Capping冷却COOLING码垛PALLETIZING生产参数Parameters:•产量Output•模温Moldtemperature•生产条件ProcessConditions•湿度RH•存放时间Time•存放温度°C•灌装温度Fillingtemperature•旋盖钮力Torque•真空Vacuum•冷却时间Time•灌装水平Fillinglevel•垂直负荷Verticalload缓冲区BUFFER热灌装瓶的热应力和机械应力Thermalandmechanicalstressesforhotfillbottles灌装Filling(70°Cto95°C)传输Conveying冷却Cooling变形(材料变软)Distortions(materialsoftening)静压HydrostaticPressure真空Vacuum封盖Capping局部变形Localizeddistortions热灌装HotFilling灌装方式Operatingmethod将液体加热至一定的温度，这个温度可使液体消毒Theliquidisraisedtoatemperatureenablingittobesterilized在此温度下进行灌装(温度最高可达92°C)Thebottleisfilledatthistemperature(upto92°C)瓶盖通过与高温液体的接触而进行消毒Sterilizationofthecapisobtainedbycontactwiththehotliquid逐步冷却Gradualcooling特殊的应力因素Specificstressfactors膨胀，继而负压变形Inflationthencollapsing局部变形Localdeformation收缩Contraction膨胀、继而负压变形Inflationthencollapsing液体的冷却及瓶颈部位的气体导致瓶子内部真空压力的产生：即通常所说的“负压变形”现象Effectofinternalvacuumpressureresultingfromthecoolingoftheliquidandtheairintheheadarea:phenomenonknownas“collapsing”温度的升高及材料的机械应力Riseintemperatureofthematerialcombinedwithmechanicalstress瓶颈部位气体的膨胀：加剧瓶子的膨胀Expansionoftheairintheheadarea:increasedinflation液体对瓶壁产生静压：瓶子膨胀Hydrostaticpressureexertedbytheliquidonthewalls:bottleinflation材料变软，极易变形Materialissoftened,easilydeformed在包装过程中局部产生压力Stressexertedlocallyduringpackaging局部变形Localdeformation未经拉伸的瓶颈与高温液体接触：材料塑化，存在变形的可能Contactoftheunstretchedneckwiththehotliquid:thematerialbecomesplastic,deformationispossible灌装后的瓶子在仍保持高温的状态下被输送：与输送和引导设备接触而导致变形Conveyingofthefilledbottleswhilestillhot:deformationoncontactwiththetransportandguidingequipment由于瓶盖产生机械应力：存在变形的风险Mechanicalstressexertedbythecap:riskofdeformation材料固有的特性导致变形Deformationresultingfromtheintrinsicpropertiesofthematerial拉伸而导致的应力在高温下释放，但吹瓶之后材料中仍存在残留的应力Releaseundertheeffectofheatofthestressfactorscausedbystretchingandwhichremaininthematerialafterblow-molding因材料本身具有一种保持应力较低状态的天然倾向而导致的变形Deformationofthematerialwhichnaturallytendstowardsastateinwhichthelevelofstressislowest“记忆”作用“Memory”effect收缩ContractionTitles基本原理热定型的基本原理单轮吹塑工艺轻体瓶线性结晶炉西得乐热灌装设备在亚洲的分布情况西得乐在亚洲的联络方法BasicPrincipleHeatSetfundamentalsOnewheelTechnologyLightweightingLinearcrystalovenReferencesinAsiaContactsinAsia热定型的基本原理HeatsetfundamentalsPET的热特性P.E.T.thermalproperties•结晶度对软化温度的影响InfluenceofcrystallinityonTg•材料处于不同状态时的特性Statesproperties•结晶的来源Originofcrystals•受热导致的结晶Heatinducedcrystallinity•拉伸导致的结晶Straininducedcrystallinity•拉伸及受热共同导致的结晶Combinedstrain&heatinducedcrystallinity•吸湿性的影响Influenceofmoisturepickup耐热瓶的吸湿过程KineticofwaterabsorptioninHRbottles结晶度对水分吸收的影响Effectofcrystallinityonwaterabsorption•应力的释放Stressrelaxation抑制应力的产生Limitedinducedstress释放产生的应力Relaxationofinducedstress关于热定型HeatsetansweringPET的受热特性PETthermalproperties材料处于不同状态时的特性Statesproperties机械强度Mechanicalresistance热稳性Thermalstability对热十分敏感Highsensitivitytoheat:当接近软化温度时，PET变软PETsoftenswhenapproachingTg记忆现象：材料回到最初的状态Memoryphenomena:materialreturnstoitsoriginalshape无序状态Amorphousstate结晶状态Crystallinestate导致结晶的因素Originofcrystals温度升高Temperaturerise机械拉伸Mechanicalstretching球粒结晶Spheruliticalcrystallization其它因素导致的结晶Inducedcrystallization7075808590951000102030405060Xc%Tgonset(°C)受热结晶HeatCristallisation拉伸+受热Orientation+heat软化温度Tg=f(X)软化温度与结晶度InfluenceofcrystallinitylevelonTg受热导致的结晶HeatinducedcrystallinityR=3m受热Heat无序状PETAmorphouspet不透光结构Nontransparentstructuretovisiblelight球粒结晶SpherulitePET的双向拉伸：对分子结构的影响Petbi-orien