Structure
Insulatingglassiscomposedoftwoormorelayersofflatglass.Usehigh-strengthandhigh-air-tightcompositeadhesivesaroundtobondandsealtwoormorepiecesofglasswithsealingstripsandglassstrips.Themiddleisfilledwithdrygas,andtheframeisfilledwithdesiccanttoensurethedrynessoftheairbetweentheglasssheets.Variousoriginalglasssheetswithdifferentpropertiescanbeselectedaccordingtorequirements,suchascolorlesstransparentfloatglasspatternedglass,heat-absorbingglass,heat-reflectiveglass,laminatedglass,temperedglass,etc.andframes(aluminumframeorglassstrip,etc.),Itismadebycementing,weldingorwelding.
Thestructureisshowninthesectionviewofdouble-layerhollowglass.Insulatingglasscanuse3,4,5,6,8,10,12mmthickslicesoforiginalglass,andthethicknessoftheairlayercanuse6,9,12mmintervals.
Thethermalconductivityofglassis27timesthatofair.Aslongastheinsulatingglassissealed,theinsulatingglasshasthebestthermalinsulationeffect.
Thereisacertainspacebetweentheglassandtheglassofthehollowglass.Theframeisfilledwithdesiccanttoensurethedrynessoftheairbetweentheglasssheets.Thedistancebetweentwolayersofinsulatingglassisgenerally8mm.
High-performanceinsulatingglassisdifferentfromordinaryinsulatingglass.Inadditiontoenclosingdryairbetweenthetwolayersofglass,alayerofspecialmetalwithgoodthermalpropertiesshouldbecoatedonthesideoftheairlayeroftheouterglass.membrane.Itcancutofftheconsiderableenergyfromthesunintotheroomandplayagreaterheatinsulationeffect.
Principle
Becausethereisadesiccantinsidethehollowglassthatcanadsorbwatermolecules,thegasisdry,andwhenthetemperaturedrops,theinsideofthehollowglasswillnotproducecondensation.Atthesametime,thedewpointontheoutersurfaceoftheinsulatingglasswillalsoincrease.Forexample,whentheoutdoorwindspeedis5m/s,theindoortemperatureis20°C,andtherelativehumidityis60%,the5mmglassstartstocondensewhentheoutdoortemperatureis8°C,whilethe16mm(5+6+5)insulatingglassisunderthesameconditions.Condensationoccurswhentheoutdoortemperatureis-2℃,andthe27mm(5+6+5+6+5)three-layerinsulatingglassstartstocondensewhentheoutdoortemperatureis-11℃.
Therearethreewaysofenergytransferinhollowglass:radiationtransfer,convectiontransferandconductiontransfer.
Radiationtransfer
Radiationtransferisthetransferofenergyintheformofradiationthroughrays,whichincludevisiblelight,infrared,andultravioletradiation.Justlikethetransmissionofthesun'srays.Reasonablyconfiguredhollowglassandreasonablethicknessoftheinsulatingglassspacerlayercanminimizethetransmissionofenergythroughtheformofradiation,therebyreducingenergyloss.
Convectiontransfer
Convectiontransferisduetothetemperaturedifferencebetweenthetwosidesoftheglass,causingtheairtodroponthecoldsideandriseonthehotside.Convectionofairisproduced,andenergyislost.Thereareseveralreasonsforthisphenomenon:oneisthepoorsealingbetweentheglassandthesurroundingframesystem,causingthegasinsideandoutsidethewindowframetobedirectlyexchangedtoproduceconvection,resultinginenergyloss;theotheristhedesignoftheinternalspacestructureofthehollowglassUnreasonable,causingthegasinsidethehollowglasstoproduceconvectionduetothetemperaturedifference,drivingenergyexchange,resultinginenergyloss;third,thetemperaturedifferencebetweentheinsideandoutsideofthewindowthatconstitutestheentiresystemislarge,resultinginthetemperaturedifferencebetweentheinsideandoutsideofthehollowglass.Larger,withthehelpofcoldradiationandheatconduction,theairfirstproducesconvectiononbothsidesofthehollowglass,andthenpassesthroughthehollowglassasawholetoformalossofenergy.Reasonablehollowglassdesigncanreducetheconvectionofgas,therebyreducingtheconvectivelossofenergy.
Conductionandtransmission
Conductionandtransmissionarethroughthemovementofthemoleculesoftheobject,drivingenergytomove,andachievingthepurposeoftransmission,justlikecookingwithanironpanItisthesameassolderingthingswithanelectricsolderingiron,andhollowglassconductsenergytransmissionthroughtheglassandtheairinside.Weknowthatthethermalconductivityofglassis0.77W/mk.Thethermalconductivityofairis0.028W/mk.Itcanbeseenthatthethermalconductivityofglassis27timesthatofair,andthepresenceofactivemoleculessuchaswatermoleculesintheairaffectstheenergytransferandconvectiontransferperformanceofhollowglass.Themainfactor,thusimprovingthesealingperformanceofinsulatingglass,isanimportantfactorinimprovingthethermalinsulationperformanceofinsulatingglass.
Features
①Greaterenergysavingeffect
Becauseofthespecialmetalfilm,thehigh-performanceinsulatingglasscanreach0.22-0.49shieldingcoefficient,soTheloadofindoorairconditioning(air-conditioning)isreduced.Theheattransfercoefficientis1.4-2.8W(m2.K),whichisbetterthanordinaryinsulatingglass.Italsoexertsgreatefficiencyinreducingtheloadofindoorheating.Therefore,thelargerthewindowisopened,themoreobvioustheenergy-savingeffect.
②Improvetheindoorenvironment
High-performanceinsulatingglasscaninterceptconsiderableenergyfromthesunintotheroom,therebypreventingdiscomfortcausedbyradiantheatandreducingsunsetsunlight.Dazzled.
③Richtonesandartistry
High-performanceinsulatingglasshasavarietyofcolors,youcanchoosecolorsaccordingtoyourneedstoachieveamoreidealartisticeffect.
④Useofhigh-performanceinsulatingglass
Suitableforofficebuildings,exhibitionrooms,librariesandotherpublicfacilities,suchascomputerrooms,precisioninstrumentworkshops,chemicalfactories,etc.,whichrequireconstanttemperatureandhumiditySpecialbuildings.Inaddition,itcanalsobeusedforsunprotectionandanti-dazzlingplaces.
Notes:Dryairisenclosedinthehollowglass,soaccordingtochangesintemperatureandairpressure,theinternalairpressurealsochanges,butthereisonlyasmalldeformationontheglasssurface.Inaddition,slightwarpagemayoccurduringmanufacturing,anddistortionmayalsobeformedduringconstruction.Therefore,includingsuchfactors,sometimestherearecorrespondingchangesinreflection,whichshouldbepaidattentionto.Differentcolorshavedifferentreflections.
Gold,copperandsilvermetalcoatingshavehighreflectivityinthemid-to-farinfraredregion,thatis,whenthewavelengthrangeisgreaterthan4μm.Ifthemetalcoatinghasatypicalthickness,thetotalreflectivitycanreach90%-95%,andthehighinfraredreflectivityisequivalenttothelowemissivity(Low-e),whichwillreducetheradiationconversionbetweentheinnerandouterglassplatesoftheinsulatingglassmodule.Correspondingly,comparedwiththestandardhollowglassmemberwithanairlayerof12mm,thethermalinsulationvaluecanbefrom0.3W/(m2.K).Inaddition,iftheairinthecomponentisreplacedbyheavygas,theinsulationvalueis1.4W/(m2.K).Byreducingthethicknessofthemetallayer,thelighttransmittancecanbeincreasedtoabout60%-60%.Thiskindofextremelythincoatinghasaverygoodprotectiveeffect,whilestillhavingahighinfraredreflectancevalue,intherangeof85%or75%.Theairlayeris12mmfilledwithheavygasinthemiddle,andthethermalinsulationvalueofthecoatingcanreach1.6-1.9W/(m2.K).
Mainuses
Insulatingglassismainlyusedinbuildingsthatrequireheating,airconditioning,noisepreventionorcondensation,andwherethereisnodirectsunlightandspeciallight.Itiswidelyusedinresidences,restaurants,hotels,officebuildings,schools,hospitals,shopsandotheroccasionsthatrequireindoorair-conditioning.Itcanalsobeusedfordoorsandwindowsoftrains,automobiles,ships,andfreezers.
Insulatingglassismainlyusedforouterglassdecoration.Itsopticalperformance,thermalconductivity,andsoundinsulationcoefficientshouldallcomplywithnationalstandards.Onlywhenthestructureisreasonableandthedesignmeetsthestandardcantheinsulatingglassexertitsheatinsulation,soundinsulation,anti-theft,andfirepreventioneffects.Thevacuumdouble-layertemperedglasscanreachlaboratorystandardsevenmore!Therearealsohollowglasswithinertgasandcolorpigmentgasaddedonthemarket,aswellastheadditionofbeautifulscenerystripsforreinforcementanddecoration.
Theroleofhollowglassaluminumspacers:Aluminumiscalledanactivemetalelement,butadenseoxidefilmwillformonitssurfaceintheair,preventingitfromcontinuingtointeractwithoxygenandwater.Itcanreactwithoxygenathightemperaturesandreleasealotofheat.Withthishighheatofreaction,aluminumcanreplacemetalfromotheroxides(thethermitemethod).
Commoncategories
One.Floathollowglass
2.Temperedinsulatingglass
Three.Coatedinsulatingglass
4.LOW-Einsulatingglass
Commoninsulatingglass:5+9A+5double-layerhollow.ShenghaiDoorsandWindowsexplainedthat5meansthatthethicknessoftheglassis5mm,9meansthatthehollowpartis9mm,andtheletterAistheabbreviationofair.Therearealsomodelsonthemarket5+15A+5,5+22A+5,5+27A+5,5+32A+5,etc.Itisnotdifficulttounderstandthemeaningoftheabove.
Safetyperformance
Becausetheinsulatingglasshasbetterheatinsulationperformance,thetemperaturedifferencebetweenthetwosidesoftheglassislarge,whichcanalsoreducetheeffectofcoldradiation;whentheoutdoortemperatureis-10℃Whenthetemperatureinfrontoftheindoorsingle-glazedwindowis-2°Candthetemperatureinfrontofthehollowglasswindowis13°C;inthesamehousestructure,whentheoutdoortemperatureis-8°Candtheindoortemperatureis20°C,3mmordinarysingleThecoldradiationareaofdouble-layerglassaccountsfor67.4%oftheindoorspace,whilethedouble-layerhollowglass(3+6+3)is13.4%.
Usinghollowglasscanimprovethesafetyperformanceoftheglass.Inthecaseofusingthesamethicknessoftheoriginalglass,thewindpressurestrengthofthehollowglassis1.5timesthatofordinarysingleglass.
Developmentprospects
Upgradingtheconsumptionstructureofresidents,encouragingindependentinnovationofenterprises,constructionofnewruralareasandtheprocessofurbanization,etc.willensurethatthegrowthtrendofthedomesticmarketforglassproductsinthemediumandlongtermwillremainunchanged.Withthedevelopmentofconstruction,automobile,decoration,furniture,informationindustrytechnologyandotherindustriesandtheimprovementofpeople'srequirementsforlivingspaceenvironment,functionalprocessedproductssuchassafetyglassandenergy-savinginsulatingglasshavebeenwidelyused.Thesupplyanddemandpatternandconsumptionstructureofflatglassarechanging.
Thedevelopmentoftheglassindustryisrelatedtomanyindustriesinthenationaleconomy,andtheglassindustryplaysapositiveroleinpromotingthedevelopmentoftheentirenationaleconomy.Therefore,the"EleventhFive-YearPlan"alsoputforwardspecificrequirementsforthedevelopmentoftheglassindustry.Variouslawsandregulationshavealsobeenpromulgatedtoregulatethehealthydevelopmentoftheglassindustry.Underthenewsituation,theglassindustrymustchangethegrowthmodeandeffectivelyadjusttheindustrialstructureinaccordancewiththerequirementsofthescientificdevelopmentconcept,inordertopromotethehealthydevelopmentoftheindustry.
Designpoints
1Thebutylglueforthefirstsealingofthegroovedaluminumdouble-passsealinginsulatingglasshasextremelylowwatervaportransmissionrate;thesecondsealinggluemainlyTherearepolysulfideglueandsiliconeglue.Thewatervaportransmissionrateofpolysulfideglueislowerthanthatofsiliconeglue,butitsUVresistanceisnotasgoodassiliconeglue,soitissuitableforwindowsorframedglasscurtainwalls(becausethealuminumframecanshadeandavoiddirectsunlight);siliconeglueissuitableforHiddenframeglasscurtainwall,itsanti-ultravioletabilityandstrengtharehigherthanpolysulfideglue.Whenthebuildinghashigherdecorativerequirementsforinsulatingglass,milkywhiteortransparentsiliconegluecanbeused.Forwoodenwindows,siliconeglueshouldnotbeusedasthesecondseal.Becauseofitspoorresistancetowoodpreservatives,thesealantwillbedamagedduetomigration.
2Thepartitionaluminumframeshouldadoptthecontinuouslongtubeelbowtype,andthejointsshouldbesealedwithbutylrubber;ifthepartitionaluminumframeadoptsthefour-cornerplug-intype,thejointsshouldalsobemadeofbutylrubber.Theinsulatingglassmadebysealingtreatmenthasaservicelifenotasgoodastheformer.Whenthesecondsealantofinsulatingglassadoptssiliconeglue,theinsulatingglasswithfour-cornerplug-inspaceraluminumframeshouldnotbeused.
3Becausethesealantisusedforsealing,itshouldnotbeusedatatemperatureof70°Corhigher,otherwiseitwillgreatlyaffecttheservicelifeoftheinsulatingglass.
4Thechangeintheinternalpressureofthehollowglassairlayerwilldeformtheglass,whichwillcauseimagedistortion.Therefore,wheninsulatingglassisusedatanaltitudeof1000morabove,theairpressuremustbeadjusted.Suppliernegotiation.
5Thethermalinsulationperformanceofawindowiscloselyrelatedtothematerialofthewindowframe,soawindowframematerialwithgoodthermalinsulationperformanceshouldbeselected.
6Ifitisusedasalightingceiling,theindoorsideglassshouldbelaminatedorexplosion-prooffilm.
7Low-Einsulatingglass,themembranesurfaceislocatedonthesecondorthirdsurface,whichshouldbeselectedaccordingtothedesignrequirements.Ifthedesignedhollowglassmustbeintheformoflargeandsmallpieces,themembranesurfacemustbeplacedonthethirdside.
8Themaximumallowableareaoftheinsulatingglasssupportedonfoursidesis1.5timesthemaximumallowableareaoftheinsulatingglasscalculatedbythethicknessoftwosingleglasssheets.
9Thefollowingtechnicalperformancerequirementsshouldbeputforwardduringarchitecturaldesign:thermalinsulationperformance,thermalinsulationperformance,soundinsulationperformance,lightingperformance,sealingperformance,andweatherresistance.
Warmedgesealingsystem
(1)Forinsulatingglassfordoorsandwindows,aseparatesealingsystemwithrubberstripscanbeusedasasingle-channelsealingmethodtoensurethehollowGlasshasaservicelifeofmorethan10years.Insulatingglassusedforcurtainwallsmustbesealedwithstructuralglueontheoutsideoftheadhesivestripasasecondarysealanttoensurethattheinsulatingglasshassufficientstructuralstrength.
(2)Itisespeciallysuitablefortheproductionofspecial-shapedhollowglassandgas-filledhollowglass,especiallysuitableforspecial-shapedgas-filledLow-Ehollowglass,becausetherubberstripitselfdoesnothavevolatilegasthatadverselyaffectstheLow-Efilm.Therefore,theLow-Einsulatingglasscanbeguaranteedtohavealongservicelife.
(3)Superspacerstriptypeinsulatingglass
InsulatingglassforwindowscanbesealedwithhotmeltbutylglueofsufficientdepthontheoutsideofthesuperspacerstriptoensurethesealingoftheinsulatingglassThesystemhassufficientresistancetowatervaporpenetration.Insulatingglassforcurtainwallsmustbesealedwithasufficientlydeepthirdlayerofstructuralglueoutsidethehotmeltbutylgluetoensurethattheinsulatingglasshassufficientstructuralstrengthandservicelife.
Traditionalwarm-edgepartitionsystem
(1)U-shapedstripinsulatingglass
InsulatingglassforwindowscanonlybeusedHotmeltbutylglueisusedasaseparatesealingmaterial.Insulatingglassforcurtainwallsmustbesealedwithsufficientdepthofstructuralglueontheoutsideofthehotmeltbutylgluetoensuresufficientbondingstrengthandservicelife.Whenusedasgas-filledinsulatingglass,youmustpaygreatattentiontothesealingoftheU-shapedstripjoint.
(2)Glue-injectedaluminumhollowglass
Itisbasicallythesameasthetraditionalaluminumhollowglass.ItshouldbenotedthatthisproductisusedinthemiddleoftwoaluminumbarsAdoptheatinsulationmaterialtobond,sothethicknessofthewholealuminumstripmustbemorethan12mmtoachieve,andduetothecharacteristicsoftheintermediateheatinsulationmaterial,itisdifficulttoachievecornertreatmentatthecorners,soyouneedtopayattentiontothecornerswhendesigningandusinginflatableinsulatingglassSealcontrolattheplace.
Processconditions
1.Accordingtothewindload,controltherequiredsizeoftheopeningandthethicknessoftherequiredglass.
2.Thehollowglassmustbemadeandconstructed,andthesizecannotbechanged.Theopeningforassemblingthehollowglassshouldberectangularandvertical.Payattentiontochecktheaccuracyofitsspecifications.
3.Insulatingglassisnotallowedtohaveanysurfacecoveredbypaintorpaper,becausethiswillcauselocaloverheatingandcausebreakage.
4.Thehollowglassshallnotbeindirectcontactwiththeframe.
5.Theinstallationrequirementsshouldvaryaccordingtothetypeofinlaidinsulatingglassmaterial.
Mainissues
Asabuildingenergy-savingmaterial,insulatingglassiswidelyusedbecauseofitsgoodheatandsoundinsulationproperties.Atthesametime,thequalityrequirementsforinsulatingglassaregettinghigherandhigher.Itisunderstoodthatthebiggestqualityproblemofinsulatingglassiscondensationintheairlayerduringuse,andthereasonforthecondensationintheairlayeristhatthedewpointoftheairlayerrisesduringuse.Therefore,controllingthedewpointofinsulatingglassisthekeytocontrollingthequalityofinsulatingglass.
Duringtheuseofinsulatingglass,whentheambienttemperaturedropstothedewpointinthedryairlayer,thesurfaceofthedryairlayerwillproducedeworfrost.Theperformanceofinsulatingglassisaffectedbycondensationorfrostontheinnersurfaceoftheglass.Ifitisensuredthattheairlayerdoesnotcondenseaboveminus40degreesCelsius,therewillbenoairlayercondensationduringtheuseofinsulatingglass.
Thedewpointofinsulatingglassreferstothetemperaturewhenthehumidityoftheairsealedintheairlayerreachesasaturatedstate.Belowthistemperature,thewatervaporintheairlayerwillcondenseintoliquidwater.Itcanbeconcludedthatthehigherthewatercontent,thehigherthedewpointtemperatureoftheair.Whenthetemperatureoftheinnersurfaceoftheglassislowerthanthedewpointoftheairintheairlayer,themoistureintheairwillcondenseorfrostontheinnersurfaceoftheglass.
Theincreaseinthedewpointofinsulatingglassiscausedbyexternalmoistureenteringtheairlayerwithoutbeingabsorbedbythedesiccant.Therearethreereasonsthatmaycausethedewpointtoincrease:
(1)SealingThereareairbubblesintheglue,causingairmoisturetoenter.
(2)Watervapordiffusesintotheairlayerthroughthepolymer.
(3)Theeffectiveadsorptioncapacityofthedesiccantislow.
Controlmeasures
(1)Strictlycontroltheproductionenvironmenttemperature
Theproductionenvironmentmainlyaffectstheattachedcapacityandtheremainingadsorptioncapacity.
(2)Reducethediffusionofwaterthroughthepolymer
Mainlyrelyontheselectionoflowpermeabilitycoefficientsealant,determineareasonablesealingthickness,reducethetemperaturedifferencebetweentheinsideandoutsideoftheinsulatingglass(thatis,controlProducewithinacertaintemperaturerangewithoutmakingthetemperaturerangetoolarge).
(3)Reduceproductionprocesstime
Trytoreducethetimethatthedesiccantisincontactwiththeatmosphere,reducethelossofadsorptioncapacityandmakethedesiccanthaveahigheradsorptioncapacity.
(4)Choosetheappropriatealuminumprofile
Theairconductionseamoftheporesshouldbesmalltoreducethewaterabsorptionrateofthemolecularsieveduringoperation.
(5)Chooseasuitabledesiccant
Tochooseadesiccantwithhighadsorptionrateandlonglasting.
Ibelievethatthequalityofinsulatingglasswillbeclearlycontrolledthroughthecontrolofmaterialselection,processing,environmentandotherlinks.
Productionprocess
1Theheatedglassshouldadoptmultiplesetsofpressingrollersandgraduallypresstotherequiredthickness.Eachgroupofpressingrollersshouldbeparalleltoeachothertoensureuniformthicknessofthepressedglass.
2Thetemperatureoftherubberstripattheexitofthepressshouldbecontrolledat40-55℃.
3Thesealingoftheinsulatingglasswithcompositerubberstripadoptsathree-stepprocedure,namelypressing,turningandpinching,tocompletethefinalsealingoperationoftheinsulatingglass.
①Press:squeezetheouterrubberstripalongtheverticaldirectionoftheedgetoanothersegmentofthepressurestripuntilthetwosegmentsofrubberstripsarecompletelyfusedtogether;
②Turn:pushTheexcessglueissmoothedalongthespacelayerinthemiddleofthehollowglass,sothatthereisnoexcessglueontheoutside;
③Pinch:PinchtwopiecesofglassinwardtoeliminatetheglasstotheoutsidecausedbypressingandturningThegapcausedbyseparation.
Payattentiontotheproblem
①Thetemperatureoftheadhesivestripleavingthehotpress;
②Thesealingtemperature,thicknessandflatnessoftheadhesivestrip,Displacement;
③Theintegrityofthesealingsurfaceoftherubberstrip;
④Thetightnessofthesealing.
Identificationmethod
1.Fillingwithinertgasargonandkrypton
Accordingtoexpertsinthedesignandconstructionofenergy-savinghousing,asfarasawindowisconcerned,thethermalenergyinthehouseThelossismainlythroughtheconductionofwindowframes,glassradiation,andconvectioninthegapsbetweenwindowpagesanddoorframes,so"hollowglass"cameintobeing.Infact,"hollowglass"isnot"empty".Accordingtotechnicalrequirements,thedistancebetweentwolayersofinsulatingglassisgenerally8mm.Testshaveshownthatifthe8mmgapiscompletelyvacuumed,atmosphericpressurewillcrushtheglass.Therefore,qualifiedinsulatingglass.Theinterlayer,thatis,the8mmthickspacingspace,mustbefilledwithinertgasesargonandkrypton.Afterfilling,thetestshowsitsKvalue(heattransfercoefficientlimitvalue),whichcanbereducedby5%comparedwiththesameperiodinthevacuumstate,whichmeansthattheheatpreservationperformanceisbetter.
2.Confusingdouble-layerglassonthemarket
Inotherwords,iftheinsulatingglassyoubuybackisreally"empty"intheinterlayer,itwillundoubtedlyshowthatitisinsulatedorTheheatinsulationandcoldinsulationperformanceisatbestdouble-layerglass,andtheeffectofheatpreservationandenergysavingmustbepoor.Scientifictestinghasprovedthatqualifiedinsulatingglasscanreducetheheattransfercoefficientlimitvalueofgeneralwindowglassfrom3.5to2.8,andheattransferDecreaseinperformancecanmaketheheatinthehousenoteasytolose.Thecounterfeitinsulatingglassonthemarketmostlysimplyfixestwopiecesofglasstogether,anditsthermalinsulationperformanceisundoubtedlypoor.
3.Aluminumstripswithholesbetweentheglass
The"double-layerglass"withinferiorheatinsulationperformanceoftencausesfogandflowersintheinterlayerduetotheentryofairandwatervapor,andevenMoldspotsareformed,sosomecompaniesoftenusealuminumstripswithholesbetweenthetwopiecesofglass,andputgranulardesiccantintheporesofthealuminumstrips.Infact,itonlyservesasatemporarydeception.,Didnotimproveanyheatinsulationperformanceofdoubleglass,afteralongperiodoftimethedesiccantfails,itwillstillrevealthestuffing.
Oneofthetricksto"verifythebody"istoseeifthereisanyicebetweentheglassinwinterandseeifthereismoistureinspringandsummer.Ofcourse,mostofthealuminumstripsareembeddedinthefalsevacuum.Thequalityofthewindowframeisalsoasign,andtheinsulatingglassisgenerallymadeofplasticsteelratherthanaluminumalloy.
Technicalparameters
TheprovisionsofGB11944-2002areexcerptedasfollows:
①Materials
a.Theglasscanbefloatglass,laminatedglassGlass,patternedglass,heat-absorbingglass,coatedglass,temperedglass,temperedandsemi-temperedglassforcurtainwalls,tintedglass,etc.FloatglassshouldmeettherequirementsofGB11614,laminatedglassshouldmeettherequirementsofGB9962,temperedglassshouldmeettherequirementsofGB9963,andtemperedandsemi-temperedglassusedforcurtainwallsshouldmeettherequirementsofGB17841.Othertypesofglassshouldmeetthecorrespondingstandardsorbenegotiatedbyboththesupplierandthebuyer.
b.Thesealantshouldmeetthefollowingrequirements:
TheelasticsealantforinsulatingglassshouldmeettherequirementsofJC/T486;
PlasticsealantforinsulatingglassShouldcomplywithrelevantregulations;
Thecolordifferencebetweenthefirstandsecondsealantcomponentsusedshouldbeclear;thevalidityperiodismorethanhalfayear;
ThesecondsealisusedforthehiddenframecurtainwallThegluemustbeasiliconesealant;itmustmeettheperformancerequirementsofinsulatingglass.
cAdhesivestrips:Adhesivestripsmadeofplasticsealantcontainingdesiccantandwave-shapedaluminumtape,andtheirperformanceshouldmeetthecorrespondingstandards.
c.Spacerframe:Whenmetalspacerframeisused,itshouldbedecontaminatedorchemicallytreated.
d.Thequality,specificationandperformanceofthedesiccantshouldmeetthecorrespondingstandards.
②Theallowabledeviationofthelengthandwidthofthehollowglassisasfollows:
Theallowabledeviationofthelengthorwidth(mm)
L<1000±2.0
1000≤L<2000+2,-3
L≥2000±3.0
③Thethicknesstoleranceofinsulatingglassisasfollows:
NominalglassthicknessThickness(mm)Allowabledeviation(mm)
t<17±1.0
17≤t<22±1.5
t>22±2.0
Note:Thenominalthicknessofinsulatingglassisthesumofthethicknessofthetwopiecesofglassandthethicknessofthespacerframe.
④Theallowabledeviationofthetwodiagonalsofinsulatingglassisshowninthetable.
Thedifferencebetweenthediagonalsofthesquareandrectangularinsulatingglassshouldnotbemorethan0.2%oftheaveragelengthofthediagonals.
⑤Widthofinsulatingglasssealant:thewidthofasinglesealantlayershouldbecalculatedanddetermined,anditsminimumwidthis10mm±2mm,andthewidthoftheouterlayerofdoublesealantsealantshouldbecalculatedanddetermined,anditsminimumwidthis5-7mm,thethicknessofthesealantlayeroftherubberstripis8mm±2mm.Productswithspecialspecificationsorspecialrequirementsshallbenegotiatedbyboththesupplierandthebuyer.
⑥Appearance:Theinnersurfaceofthehollowglassmustnothavestains,inclusionsandsealantsplashesthathindertheperspective.
⑦Performancerequirements:Thesealing,dewpoint,ultravioletradiation,climatecycle,hightemperatureandhighhumidityperformanceofinsulatingglassaretestedaccordingtoGB7020,andthefollowingrequirementsmustbemet.
※Whenthetestpressureislowerthantheambientairpressureby10±0.5KPa,thethicknessincreasemustbe≥0.8mm.Afterthepressureismaintainedat2.5,thethicknessincreasedeviationis<15%Inordertoleakallsamples,noleakageisallowed.
※Thedewpointreducesthetemperatureofthedewpointmeterto≤-40degrees,sothatthedewpointmeterisincontactwiththesamplesurfacefor3minuteswithoutcondensationorfrostontheinnersurfaceofthesample.
※UltravioletradiationTheinnersurfaceofthespecimenshallnothavetracesoffoggingandpollutionafter168hofultravioletradiation.
※Climatecycleandhightemperatureandhighhumidityclimatetestweresubjectedto320cycles,hightemperatureandhumiditytestwerecycled224times,andthedewpointtestwascarriedoutafterthetest.Atotalof12samples,atleast11sampleswithoutcondensationorfrost.
Wheninsulatingglassisselectedforthehiddenframecurtainwall,thesecondsealantoftheinsulatingglassmustbesiliconesealant,anditmustbecompatiblewiththesealantusedforstructuralglassassembly,thatis,bothmustbeusedCompatiblesealants.Whenacertainsiliconesealantisusedforstructuralassembly,itisbesttousethesamefactorysiliconesealantfortheinsulatingglasssealantlayer.