Thesheetusedforblisterpackagingiscalledrigidfilmorfilm.Commonlyusedare:PET(polyethyleneterephthalate)rigidfilm,PVC(polyvinylchloride)rigidfilm,andPS(polystyrene)rigidfilm.PShardfilmhaslowdensity,poortoughness,andiseasytoburn.Itwillproducestyrenegas(aharmfulgas)whenburned,soitisgenerallyusedtoproducevariousindustrialblistertrays.PVChardfilmhasmoderatetoughnessandisnoteasytoburn.Itwillproducechlorinewhenburned,whichwillaffecttheenvironment.PVCiseasytoheatandcanbesealedwithasealingmachineandhigh-frequencymachine.Itisthemainrawmaterialforproducingtransparentplasticproducts.PEThardfilmhasgoodtoughness,hightransparency,easytoburn,anddoesnotproduceharmfulgaswhenburned.Itisanenvironmentallyfriendlymaterial,butthepriceishigh,anditissuitableforhigh-endblisterproducts.TheblisterblisterinEuropeanandAmericancountriesgenerallyrequiresPEThardfilm,butItisnoteasytoheatseal,whichbringsgreatdifficultiestopackaging.Inordertosolvethisproblem,peoplecompoundalayerofPVCfilmonthesurfaceofPET,namedPETGrigidsheet,butthepriceishigher.Let'stalktoyouaboutthisissue.Blister:Aplasticprocessingtechnology.Themainprincipleistoheattheflatplastichardsheettosoftenit,thenusevacuumtoabsorbitonthesurfaceofthemoldandcoolittoform.Itiswidelyusedinplasticpackaging,lighting,advertising,decorationandotherindustries.　　Thesheetusedforblisterpackagingiscalledrigidfilmorfilm.CommonlyusedarePET(polyethyleneterephthalate)rigidfilm,PVC(polyvinylchloride)rigidfilm,andPS(polystyrene)rigidfilm.　　PShardfilmhaslowdensity,poortoughness,andeasytoburn.Itwillproducestyrenegas(aharmfulgas)duringcombustion,soitisgenerallyusedtoproducevariousindustrialblistertrays.　　PVCrigidsheethasmoderatetoughness,isnoteasytoburn,andwillproducechlorinewhenburned,whichwillaffecttheenvironmenttoacertainextent.PVCiseasytoheatandcanbesealedwithasealingmachineandahigh-frequencymachine.Itisthemainrawmaterialforproducingtransparentplasticproducts.PEThardfilmhasgoodtoughness,hightransparency,easytoburn,anddoesnotproduceharmfulgaswhenburned.Itisanenvironmentallyfriendlymaterial,butthepriceishigh,anditissuitableforhigh-endblisterproducts.TheblisterblisterinEuropeanandAmericancountriesgenerallyrequiresPEThardfilm,butItisnoteasytoheatseal,whichbringsgreatdifficultiestopackaging.Inordertosolvethisproblem,peoplecompoundalayerofPVCfilmonthesurfaceofPET,namedPETGrigidsheet,butthepriceishigher.

1.PVCsheethashightoughnessandisnoteasytoburn.Itwillproducechlorinewhenburned,whichwillaffecttheenvironmenttoacertainextent.PVCiseasytoheatandcanbesealedwithasealingmachineandhigh-frequencyedgesealing.Itisthemainrawmaterialforproducingtransparentplasticproducts.PVCsheetisawidelyusedandpopularmaterial.PVCfilmcanbedividedintoenvironmentalprotectionandnon-environmentalprotection.Itcanbemadeintovariousblisterpackagingproductssuchastransparent,colorful,anti-static,gold-plated,flocking,etc.Themainfeaturesarehightransparency,goodsurfacegloss,fewcrystalpoints,smallwaterlines,wideuse,strongimpactresistance,andeasymolding.Theproductsarewidelyusedintoys,food,electronicproducts,medicine,electricalappliances,gifts,cosmetics,stationery,etc.Productpackaging.2.PShardfilmhaslowdensity,poortoughness,easytoburn,andstyrenegas(aharmfulgas)willbeproducedwhenburned,soitisgenerallyusedtoproducevariousindustrialblistertrays.PSsheetisanewtypeofenvironmentallyfriendlypackagingmaterialdevelopedinrecentyears.Withitsexcellentthermoformingperformance,goodenvironmentalperformanceandsanitaryperformance,itiswidelyusedinmedicine,food,toys,andelectronics.3.PEThardfilmhasgoodtoughnessandisanewtypeofmaterialdevelopedinrecentyears.Withitsexcellenttoughness,highstrength,hightransparency,andrecyclability,itiseasytoburnanddoesnotproduceharmfulgaseswhenburned.ItisanenvironmentallyfriendlymaterialandgraduallybannedPVC,butthepriceishigh.Itissuitableforhigh-endblisterproducts.TheblistershellsinEuropeanandAmericancountriesgenerallyrequiretheuseofPETmaterials,buttheirthermalmeltingpointisrelativelyhigh,whichbringsgreatdifficultiestohigh-frequencypackaging.Inordertosolvethisproblem,peopleusePETmaterialsonthesurfaceofPET.LayerPVCfilm,namedPETG,butthepriceishigher.Mainlyusedinelectronics,food,toys,colorboxwindows,collarsupports,shoepackaging,etc.Itsadvantagesareasfollows:1.Ithasexcellenttransparencyandsmoothnessandgooddisplayeffect.2.Excellentsurfacedecorationperformance,canbeprintedwithoutsurfacetreatment,easytopresspatterns,easytometalprocessing(vacuummetalcoating)3.Withgoodmechanicalstrength.4.Goodbarrierperformancetooxygenandwatervapor.5.Goodchemicalresistance,canwithstandtheerosionofavarietyofchemicalsubstances.6.Itisnon-toxicandhasreliablehygienicperformance.Itcanbeusedforpackagingfood,medicineandmedicalequipment,andcanbeY-raysterilizedforthepackageditems.7.Ithasgoodadaptabilitytoenvironmentalprotectionandcanberecycledeconomicallyandconveniently;whenitswasteisincinerated,noharmfulsubstancesharmfultotheenvironmentareproduced.PETsheetisconsideredtobeanidealpackagingmaterialthatmeets(ROSH)environmentalprotectionrequirements.4.PETGsheet,alsocalledGPETsheet,ismadeofanamorphousPETresinmodifiedwithcyclohexanediol.ThebiggestadvantageofPETGsheetisgoodheatsealingperformance,easyoperationduringsealing,goodsealingeffectandeasygluebonding.Atthesametime,itschemicalresistance,opticalproperties,andscratchresistancearealsoverygood.PETGhaspassedtheUSFDA'sfoodcontactstandardsandcanbeusedinthepackagingoffoodandpersonalhealthproducts,medicalandhealthequipmentandfood,aswellaselectronicdevicepackaging.Itsadvantagesareasfollows:1.Goodtransparency,suitableforproductsrequiringhightransparency.2.Excellentimpactstrengthandrigidity.3.Excellentprocessability.Itcanbeprocessedbysawing,die-cutting,drillingandlasercutting.Itcanalsobecoldandhotbending,bonding,weldingandpolishing,printingandpainting;Andcoldbendingdoesnotwhiten,theappearanceisbright.4.Goodthermoformability,canbeformedwithoutpreheating,highprecision,gooddeepformability,nocrackinganduniformthickness.5.Lowflammability,goodfireresistance,non-combustion,lowsmokeemission,noharmfulsubstancesafterburning.5.PPsheetismadeofPPresinthroughtheprocessofbrewing,calenderingandtrimming.Ithaslightweight,brightandcalmsurface,goodheatresistance,highmechanicalstrength,excellentchemicalstabilityandinsulationIthasthecharacteristicsofsexandnon-toxicity,andcanbemadeintodailynecessitiessuchasbeveragecupsandfoodboxesafterthermoforming.6.GAGisathree-layercompositesheet.Itisathree-layercompositesheetproducedbyco-extrusionofthemiddlelayerAPETandtheupperandlowerlayersofPETGrawmaterialsinanappropriateratio.Itisespeciallysuitableforpackagingboxesthatneedtobebondedbyhigh-frequencyheatsealingandglue.Itsadvantagesareasfollows:1.Goodtransparency,transparencycanreachmorethan90%,goodtexture,suitableforproductsthatrequirehightransparency.2.Excellentimpactresistanceandrigidity,thematerialishardanddurable,suitableforapplicationswithhighimpactresistance.3.Excellentprocessability.Itcanbeprocessedbysawing,diecutting,drillingandlasercutting.Itcanalsobecoldbendingandhotbending,bonding,weldingandpolishing,printingandpainting;coldbendingisnotwhitening,andtheappearanceisbright.4.Goodthermoformability,canbemoldedwithoutpreheating,highprecision,shrinkagerateisabout0.5%;deepformability,nocrackinganduniformthickness.5.Environmentalprotection,canberecycledandusedwithoutpollutingtheenvironment.6.Excellentfoodhygiene.ThematerialisPETG,whichcanmeetallmajorfoodregulations,suchasF

Thevacuumblistermoldingprocesswasknownasearlyasthebeginningofthe20thcentury,butitsapplicationinindustrialproductionwasonlyafterthe1940s,anditonlydevelopedinthe1960s.Inthepast20years,ithasdevelopedintooneofthemostimportantmethodsforprocessingpackagingmaterials.Thereasonfortherapiddevelopmentofthistechnologyisthecontinuousinnovationofvacuumformingtechnologyandequipment,aswellasthedevelopmentofnewsheetswithformingproperties;itisalsodeterminedbythedevelopmentofthepackagingindustryandthecharacteristicsofvacuumformingpackaging.Vacuumformingisoneofthemostcommonlyusedformingmethodsforplasticpackagingcontainers.Itisasecondarymoldingtechnologythattakesthermoplasticsheetsasthemoldingobject.Inforeigncountries,vacuumblistermoldingisanoldmoldingprocess.Duetocontinuousdevelopmentandchanges,ithasbeenhighlyautomatedandmechanized,andithasachievednowasteand100%ofrawandauxiliarymaterialsintoproducts.Themoldingsystemengineeringoffullassemblylineproduction.Vacuumblistermoldinghasdifferencesinthefollowingconditions:·Theremoldingtemperaturerequiredforheatingthemoldingmaterialtoahighlyelasticstate·Themoldingmoldusuallyusedinblistermolding·Theproductiscooledtoacoolingtemperaturethatdoesnotchangeinsize·DimensionalstabilityInmostcases,post-processingofblistermoldingisalsonecessary,suchas:·trimming·welding·bonding·heatsealing·coating·metalspraying·flocking·printingvacuumformingNowithasbecomeagenerallyacceptedtermintheprocessingfield:"vacuumforming".And"pressureforming"(pressureforming)referstosomespecialprocessesusingairpressure."Thermoforming"(thermoforming)isageneraltermforvariousthermoplasticmoldings(includingvacuumandpressure,ormixedmolding).1.Theadvantagesanddisadvantagesofvacuumblistermolding.Judgewhetheranyoneoftheprocessingandproductionprocessesissuccessful,comparewithanotherprocessingmethod,whetherthecostoftheproductsproducedbythismethodisappropriate;orareproducedbythesetwomethodsThecostoftheproductisthesame,butthequalityoftheproductproducedbythismethodisimproved.Inmanyapplications,injectionmoldingorblowmoldingcompeteswithvacuummolding.Butasfaraspackagingtechnologyisconcerned,unlesscardboardisusedaspackagingmaterial,thereisnootherprocessingmethodthatcancompetewithvacuumformingtechnology.Themainadvantageofvacuumblistermoldingisitsengineeringeconomy.Forproductssuchascompositesheet,foamsheetandprintingsheet,themoldshouldbechangedappropriatelytoreplacethevacuumsuctionmoldingmachine.Productswithverythinwallscanbevacuummoldedwithhighmeltviscositysheets,whileinjectionofthesamewallthicknessrequireslowmeltviscositypellets.Forasmallnumberofplasticparts,thefavorablemoldcostisanotheradvantageofvacuumblistermolding.Forlarge-volumeparts,theproductcanachieveverythinwallthicknessandthehighoutputratioofthevacuumblistermoldingmachineisveryadvantageous..Thesmallestpartsthatcanbeproducedbyvacuumblistermoldingarepackagingmaterialsfortabletsorbatteriesforwatches.Itcanalsoproduceverylargeproducts,suchasgardenpoolswithalengthof3to5meters.Thethicknessofthemoldingmaterialcanrangefrom0.05to15mm,andforfoamedmaterials,thethicknesscanreach60mm.Anykindofthermoplasticsormaterialswithsimilarpropertiescanbevacuummolded.Thematerialusedforvacuumblistermoldingisasheetwithathicknessof0.05to15mm,andthesesheetsaresemi-finishedproductsmadeofpelletsorpowder.Therefore,comparedwithinjectionmolding,therawmaterialforvacuumblistermoldingwillincreaseadditionalcosts.Itisnecessarytocutthesheetduringvacuumforming,whichwillproducescraps.Aftercrushingtheseleftoversandmixingthemwiththeoriginalmaterials,theycanbemadeintosheetsagain.Invacuumforming,onlyonesurfaceofthesheetisincontactwiththevacuumformingmold,soonlyonesurfaceisconsistentwiththegeometricdimensionsofthevacuumformingmold,andthecontouroftheothersurfaceoftheproductisobtainedbydrawing.