旭化成K胶Asaflex-en

ClearStyrenicCopolymerTableofContentsPageFundamentals2ASAFLEX™GradesandProperties3ASAFLEX™MoldingandApplications-Moldingprocessesandtemperatures-Injectionmolding-Sheetextrusion-Filmextrusion-Profileextrusion-Blowmolding4－7ASAFLEX™Characteristics-Low-temperatureimpactstrength-Heatdistortionresistance-Weatherability-Gaspermeability-Chemicalresistance-Hingecapability-Gamma-rayresistance-Comparisonwithothertransparentresins-Conformitywithfood-hygienerequirements8－12BlendedASAFLEX™Properties-Transparency-Impactstrength-Lowtemperatureimpactstrength-Gaspermeability13－17ImportantNotesandPrecautions181TheASAFLEX™polymerchainiscomposedofalternatingstyreneandbutadieneblocks.Thestyreneblocksimpartrigidityandhighcompatibilitywithotherstyrenicresins.Thebutadieneblocks,withtheirfinedispersion,providehighimpactstrength.Withthisblockcopolymercomposition,ASAFLEX™issuitableformolding,extruding,andformingprocesses,eitheraloneorinblendedform,forproductsrangingfromfoodandcosmeticscontainerstoshrinklabelsandblisterpackaging.ASAFLEX™–transparentHIPS–opaqueASAFLEX™andHIPSmicrographs：butadieneappearsdark,styrenelight.FundamentalsHightransparencyExcellentimpactstrengthHighcompatibilitywithotherstyrenicresinsExcellentcoloringandprintingqualitiesElegantglossExcellenthingepropertiesConformitywithfoodhygienerequirements2WhatisASAFLEXTM?MorphologyofASAFLEXTMInASAFLEX™resins,asshowninthelower-leftmicrograph,thebutadiene-phase(i.e.,therubber-phase)dispersionisonafinerscalethanthewavelengthofvisiblelight.Therefore,ASAFLEX™caneffectivelyimprovetheimpactstrength,flexuralproperties,andothercopolymercharacteristics,withoutanyeffectonlighttransmission.InHIPS(highimpactpolystyrene),incontrast,thebutadiene-phasedispersionresembleslarge“salami”cross-sections,whichtendtoblocklightandthusmaketheresinsopaque.SalientfeaturesofASAFLEXTMPropertyTestmethodUnits805810825830840800S815(withwax)835(withwax)845(withwax)DensityISO1183g/cm31.021.011.021.011.021.02WaterabsorptionISO62%0.10.10.10.10.1＜0.1MFR(200℃,5kgf)ISO1133g/10min1056576Moldshrinkage－%0.2～0.80.2～0.80.2～0.80.2～0.80.2～0.80.2～0.8Tensilestrength*1ISO527-1MPa302027182741Elongation*１%152502002504012FlexuralstrengthISO178MPa502437213454FlexuralmodulusMPa155014001200110015002550RockwellhardnessISO2039-2Rscale881055101078DurometerhardnessISO868Dscale756271556875Charpyimpactstrengthunnotched*２ISO179kJ/m216NB100NBNB23CharpyimpactstrengthV-notched*２kJ/m21.3P2P21.1Heatdistortiontemp.*３ISO75-1°C636557606269Vicatsofteningpoint*４ISO306°C918382728196Totallighttransmis-sion*５ISO13468%908990898890Haze*５%0.51.20.521.2ISO147823.0Keyadvantages-Transparency-Stiffness-Surfacehardness-Compatibilitywithstyrenics-Impactstrength-Hingecapability-Transparency-Lowanisotropy-Impactstrength-Thermalstability-Impactstrength-Excellentpropertiesbalance-CompatibilitywithGPPS-Excellentpropertiesbalance-Transparency-Stiffness-SurfacehardnessRecommendedmoldingprocessInjectionmolding◎–◎○○◎Extrusion–◎◎◎◎○Blowmolding––◎–––Typicalapplications-Cosmeticscaps-Foodcontainers-Cosmeticscaps-Foodcontainers-Blisterpackaging-laminate/shrinklabels-Blisterpackaging-Shrinklabels-Laminate/shrinklabels-Drinkcups-Foodcontainers-Gardeningampoules-Cosmeticscaps-Foodcontainers*1At5mm/minforASAFLEX™805and50mm/minforallothergrades.*2ValueatfractureintotwoormorepiecesNB:non-breakat15J,P:partialbreakat15J.*3Non-annealed,1.8MPaload,3mmwidth.*410Nload,50K/h.*52mmplate.Pleasenotethatalldataandvaluesaregivenastypicalresultsobtainedwiththeindicatedtestmethodsforpurposesofbasicreferenceingradeselectiononly,andnotasanyproductspecificationorwarrantyofanynature,andaresubjecttochangewithoutnotice.ASAFLEX™GradesandProperties3ASAFLEX™MoldingandApplicationsASAFLEXTMcanbeusedinanyofthemoldingprocessesgenerallyemployedforthermoplasticpolymers,asindicatedinthefollowingchart,whichprovidesabasicguidelineonoptimalandpracticablemoldingtemperaturerangesofASAFLEXTM.Temperatureisgenerallythekeyconsideration.Temperaturesof250ºCorhigheraregenerallyinappropriate,asASAFLEXTMwilltendtocauserapidcrosslinkinginthebutadiene(rubber)phase,lossoftransparency,andotherpropertiesdegradation.Foroperationswhichmayinvolvelongretentiontimes,temperaturesaslowas230°Cmaycausesimilarproblemsandrequireparticularcare.Becauseofitslowwaterabsorption,ASAFLEXTMordinarilyrequiresnopre-drying.MoldingProcessesandTemperaturesASAFLEXTMmoldingtemperatures*-optimal()andpracticable()ranges*TherangesshownareforASAFLEX™regulargrades.MoldingprocessMoldingtemperature（℃）１００１２０１４０１６０１８０２００２２０２４０２６０InjectionmoldingInjectionblowmoldingT-dieextrusionBlown-filmextrusionBlowmoldingCompressionmoldingVacuumformingPressureforming4Importantnoteongradeswithwax–ASAFLEX™815,835,and845TheuseofASAFLEX™gradeswithwaxmayresultinsurfacewhiteningandopacityinextrudedsheetsfilms,andotherproducts,duetowaxblooming.Thistendencyvarieswithresinformulations,extrudingconditions,andconditionsofproductstorageanduse.ItisthereforeessentialtoperformadvancetrialsbeforeusinganyASAFLEX™gradewithwax,toconfirmthatthedegreeofwaxbloomingwillbeacceptablefort