三元乙丙卷材屋面系統(tǒng)中壓敏膠粘帶接縫技術(shù)及其應(yīng)用

三元乙丙卷材屋面系統(tǒng)中壓敏膠粘帶接縫技術(shù)及其應(yīng)用美國(guó)卡萊爾合成技術(shù)有限公司，國(guó)際市場(chǎng)總監(jiān)，奧蘭多?洛博關(guān)鍵詞EPDMmembrane,vulcanizedrubber,single-ply,roofingandwaterproofing,fieldsplicing,pressure-sensitive,splicingtape,roofenvironment,roofsystem,fullyadheredroofingsystem,loose-laidballastedroofingsystemmechanicallyfastenedroofingsystem,tapeaccessoryproducts.摘要三元乙丙(EPDM,Ethylene-Propylene-DieneMonomer)防水卷材是以乙烯、丙烯和二烯炷三種單體共聚合成的橡膠為基的硫化橡膠卷材，近20年來(lái)，三元乙丙卷材世界各地的應(yīng)用一直在平穩(wěn)增長(zhǎng)。三元乙丙橡膠卷材屋而防水系統(tǒng)具有非常優(yōu)異的耐久性，適用于大而積的平屋面和各種復(fù)雜異形結(jié)構(gòu)的屋面：施工時(shí)不需大型設(shè)備，所以防水施工分包商無(wú)須大額的設(shè)備投資。任何屋而防水系統(tǒng)的長(zhǎng)期性能取決于屋面環(huán)境條件。屋而環(huán)境可分為兩部分：施工環(huán)境和工作環(huán)境。施工環(huán)境指防水系統(tǒng)在施工時(shí)的環(huán)境條件，如濕度、灰塵及英它污染物、屋面上的交通、溫度變化、刮風(fēng)和降雨等。工作環(huán)境指防水系統(tǒng)長(zhǎng)期所處的環(huán)境條件，如使用壽命、水、水汽、高低溫、溫度變化、結(jié)構(gòu)變形及卷材收縮、銹蝕、煙火和刮風(fēng)等。自始至今，硫化型三元乙丙橡膠卷材被公認(rèn)為是耐候性和耐紫外線性能最好的材料，但這恰恰使之成為難粘材料。雖然業(yè)界針對(duì)卷材之間的搭接縫處理，采用過(guò)多種膠粘劑及相應(yīng)的搭接技術(shù)，但膠粘劑接縫技術(shù)都存在冬季施工較困難等缺陷。近年來(lái)，壓延成形的預(yù)制膠粘帶在三元乙丙卷材現(xiàn)場(chǎng)搭接中逐步得到普及。搭接膠粘帶的應(yīng)用大大節(jié)省了工時(shí)，而且膠粘帶的長(zhǎng)期性能與卷材本身完全相容，能夠抵抗各種屋而環(huán)境因素的破壞作用。近10年來(lái)，在各種空鋪或卵石壓頂屋而系統(tǒng)中，一種特制、完全硫化的壓敏膠粘帶作為三元乙丙卷材間的搭接膠帶得到了成功的應(yīng)用。這種壓敏膠粘帶的特殊配方和施工技術(shù)使得整個(gè)防水系統(tǒng)更加耐用持久，同時(shí)也避免了施工過(guò)程中出現(xiàn)的如溶劑揮發(fā)量大、涂層厚度不均勻等不利因素，為防水施工分包商提供了安全、經(jīng)濟(jì)、省時(shí)、省工的搭接技術(shù)。除了卷材與卷材間的搭接外，這種壓敏膠帶技術(shù)同樣可以用于屋面系統(tǒng)各種輔助材料(如泛水卷材、管根密封構(gòu)件以及陰陽(yáng)角等)的預(yù)制。在機(jī)械固定屋而防水系統(tǒng)中，風(fēng)壓是卷材及其接縫須要抵抗的最大荷載，也是設(shè)汁時(shí)須要考慮的最重要因素。最近的研究結(jié)果以及應(yīng)用實(shí)例表明，只要在搭接縫使用足夠?qū)挾鹊哪z粘帶，并以機(jī)械固左件為中心用膠粘帶覆蓋粘接，完全可以保證機(jī)械固定屋而系統(tǒng)中卷材接縫的強(qiáng)度。本文闡述了三元乙丙卷材防水系統(tǒng)在近期發(fā)展起來(lái)的壓敏膠粘帶搭接技術(shù)，包括搭接膠粘帶的歷史、屋而環(huán)境條件的影響、屋而防水系統(tǒng)的設(shè)訃以及膠粘帶輔助配套材料等。的歷史、屋而環(huán)境條件的影響、屋而防水系統(tǒng)的設(shè)訃以及膠粘帶輔助配套材料等。發(fā)言人簡(jiǎn)介奧蘭多?洛博教育：1975年.美國(guó)馬里蘭大學(xué)，動(dòng)物學(xué)/化學(xué)，學(xué)士1977年，美國(guó)馬里蘭大學(xué),1977年，美國(guó)馬里蘭大學(xué),企業(yè)財(cái)務(wù)與市場(chǎng)學(xué)，碩士1999年一2003年：系統(tǒng)匯編程序(SAP),碩士工作經(jīng)歷:國(guó)內(nèi)市場(chǎng)部經(jīng)理美國(guó)Cooley有限公司1987年一1989年國(guó)際項(xiàng)目經(jīng)理美國(guó)卡萊爾合成技術(shù)有限公司1989年一國(guó)內(nèi)市場(chǎng)部經(jīng)理美國(guó)Cooley有限公司1987年一1989年國(guó)際項(xiàng)目經(jīng)理美國(guó)卡萊爾合成技術(shù)有限公司1989年一1991年國(guó)際業(yè)務(wù)經(jīng)理美國(guó)卡萊爾合成技術(shù)有限公司1991年一1995年國(guó)際市場(chǎng)總監(jiān)美國(guó)卡萊爾合成技術(shù)有限公司1995年一至今專業(yè)活動(dòng):RILEM：國(guó)際建筑材料實(shí)驗(yàn)室與專家協(xié)會(huì)，系統(tǒng)與結(jié)構(gòu)1989年一1995年，屋面卷材耐熱分析工作小組副主席1989年一至今，協(xié)會(huì)成員CSI：美國(guó)建筑規(guī)范協(xié)會(huì)1975年一1989年，會(huì)員主席，巴爾的摩/華盛頓1975年一2000年，協(xié)會(huì)成員NRCA：美國(guó)國(guó)家屋面承包商協(xié)會(huì)1981年一至今，協(xié)會(huì)成員SPRI：?jiǎn)螌泳聿奈菝嫦到y(tǒng)協(xié)會(huì)1987年—1989年，固定件小組委員會(huì),候補(bǔ)委員卷材標(biāo)準(zhǔn)測(cè)試：歐洲、日本1989年一至今USEOFPRESSURE-SENSITIVETAPEINEPDMSINGLE-PLYROOFINGAPPLICATIONSDirectorInternational,CarlisleSyntecIncorporatedlntrodiictionOrlandoR.LoboSingle-plyvulcanizedrubbersheetingbasedonethylenepropylenedieneterpolymers(EPDM),hassteadilyincreasedinusageforroofingandwaterproofingoverthepast20years.TheuseofEPDMmembranesforroofinghasforeverchangedthetechnologylevelofroofingandroofdesigns;particularlyforlarge,lowslopecommercialbuildings.EPDMmembraneroofsystemsarepotentiallyverylonglasting,canbeusedtocoverlarge,flatareasorcomplex,unusuallyshapedroofsanddonotrequirehugeinvestmentsincapitalequipmentbytheroofingcontractors/applicators?EPDMpolymerfirstbecamecommerciallyavailablein1963.By1970,formulationchemistryhadcometothepointwhereEPDMsheetscouldbeproducedthathadtheproperbalanceofphysicalandchemicalcharacteristicstomakethemsuitableforuseasroofmembranes?AssistedbytwooilboycottsthatgreatlyaffectedthecostandqualityoftheasphaltusedinthetraditionalBuiltUpRoof(BUR)designandbydesignchangesthatincreasedtheamountofthermalcyclingthattheroofhadtodealwith,theEPDMmembraneroofingbusinesssegmentexperienceddoubledigitgrowthinthelate°70'sandearly'80's.Tliecurrentmarketsizeisestimatedtobe1,000.000,000sq.ft.(929,000.000SM)peryear.Fromthebeginning,itwasknownthatthecharacteristicsofvulcanizedEPDMmembranesthatmadethemsoresistanttotheeffectsofclimateandUVlightalsomadethemverydifficulttobondtogethertoformsplices.Theindustryhas^weathered''manyadhesivesystemsanddesigns.Tlieearliestwereverytimeconsumingandcomplex?Currently,pre-formedextrudedtapesaregainingmuchpopularityforpreparingfieldsplicesofEPDMmembranes.Theysignificantlyreducethetimerequiredtopreparefieldsplicesandappeartomatchthelong-termperformanceofthemembraneitself.ThispaperwilldiscussthevariousaspectsofEPDMmembranefieldsplicingtapesandhowtheyrelatetothemembraneitself.Thisincludesahistoryofsplicetapes,theroofenvironment,roofsystemdesignsandtapeaccessoryproducts.HistoryTheuseoftapeinfieldsplicingwaterproofingmembranehaditsbeginningover40yearsagotothe1957-1960timeperiodintheinstallationofrainwatercatchmentbasinsforlivestockinUtahandofalargeMobilOilsaltpitlineratDaisetta,Texas?Thelinerwasmadefrombutylpolymerandwassplicedtogetherwithacuringgumtapeand2-part.solvent-basedbutyladhesive?Thepurposeofthegumtapewastodistributestressattheseamandcompensateforirregularitiesintheearthensubstructure?Thegumtapewasacalendaredandslitbutylproductabout.035"(0.875nun)thickinwidtlis&om2"to8"(50-400nun).Thetapecontainedcuringacceleratorsthatcross-linkedthebutylpolymerwhenthenibbersheetwasexposedtoheat.Theadhesivecuredatambienttemperatureafterthetwopartsweremixedtogether.Thecurewasatypicalleaddioxide/paraquinonedioximecross-linkingmechanism.Asthetransitionofrubbermembraneprogressedfrompondliningintoroofinginstallationsthecuringgumtapeandtwo-partbutyladhesivelogicallybecametheprimaryfieldseamofchoice?Thegumtapeseamwasstrongandreliable,albeitslow,expensive,andtimeconsuming?Thissplicewasusedinwaterproofing,lining,androofingforbothbutylandEPDMnibbermembranesfrom1961untilthemid1970s.Inthe1970stheroofingindustryexperiencedareductioninthequalityofasphaltusedinBuilt-UpRoofing(BUR)alongwithanincreaseinthepriceofasphalt.ThesetwofactorsallowedEPDMroofingmembranesystemstobecompetitivewithBURinthemarketplaceespeciallywiththeballastedEPDMsystem.Atremendousincreaseinsingle-plyroofingwasexperiencedbetweentheyears1975and1986.ThehighvolumeofEPDMroofscouldnolongeracceptafieldsplicingmethodthatwasasslowasthegumtapesplice?Theroofingapplicatorhadtocompletehisroofquicklyandgoontothenextone?Tospeeduptheseamingprocessinthefieldaone-part,solvent-basedneoprenecementbecamethenorm.Aftertime,one-partmultiplereactionsolvent-basedbutylsplicingcementbecamethenorm.Theone-partbutyladhesivesreplacedneoprenecementsthatabsorbedwater.Thesesystemsarestillinusetoday.Intheearly1980sanothertypeofsplicesystembecameavailableforEPDMmembranethatclaimedtobefast,reliable,withabondlineofuniformthickness.Thisspliceusedpressure-sensitivetape.Byprcssuroscnsitivcsplicing(apeforroofingwearereferringtoasoftbutylrubber(isobutylene-isoprenecopolymer)oranEPDM(Ethylene-Propylene-Dienelerpolymer)/butylrubberblendthatisformed(extruded)intoa2.5'、to6'(62-150mm)widex0.035"(0.875inm)thickpermanentlytackytapethatadhereswithslightpressure?ThetapeisusedtoattachtwoormoresectionsofEPDMsingle-plymembranetogethertoformcontinuous.unifoun,watertightroofing'blanket".Thesplicetapesfindingapplicationinroofingonanexperimentalandinsomecasescommercialbasiswereofthreetypes:1? Non-curingtapesCuringtapesFullycuredtapesAllthreetypesofsplicetapeshavebeenevaluatedandsomedeficiencieswerenoted.Nomcuringtapeswereformulatedwithbutylrubberandhighamountsofplasticizers,fillersandtackifyingresinstomakethemsoft,pliable,andtackysothattheywetouttheEPDMmembranesurfacewithpressureandadheredstrongly.Theproblemwithapressure-sensitivebutyltapethatdoesnotcross-linkisthatthetapehasverypoorresistancetotheambienttemperaturesfoundontheroofandconsequentlytheresistanceofthesplicetocreepisalsoextremelypoor.Inthesummertimewhenthetemperaturesofblackrubberapproaches200°F(93°C)thesplicewouldslowlyseparatewithin30daysinserviceallowingwatertoinfiltratetheroof.Wequicklyrealizedthatanon-curingtapewouldnotperformintheroofenvironment.Likewise,thecuringprcssurc?scnsi(ivc(apeshadsimilardeficienciesontheroofuntiltheywerecross-linked.Anystressontheseambeforethetapewasexposedtoenoughheatforcurecausedtheseamtocreepapartandfail.Thecuringtapeswerealsounreliablebecausetheywouldpartiallycureinstorage,whichwouldreducethetackofthetape?WithoutsufficienttackthetapewouldnotwetouttheEPDNmembrane,andsplicestrengthwouldbeverylow.Theperformanceofcuringtapeswasnotconsistentenoughtouseinroofinginstallations.Thethirdtypeisthefullycured(ape.Thistapeisaggressivelytackyandcohesivelystrong;itiscuredtoatensilestrengthof50psiandelongationof1000%.Thetensilewillnotincreaseevenwithadditionalexposuretoambientrooftoptemperatures.Butmostimportantlyexposureofthetapesplicetoelevatedtemperatureswillnotaffecttheseamperformance?Theresistancetocreepfromstressremainsexcellentforthefullycuredtape?Thisistheonlypressure-sensitivesplicetapethathasbeenfoundtobesuitableforuseinEPDMroofinginstallations.Thelong-termperformanceofthefullycuredsplicetapewasproveninthefirstcommercialuseoftheproductinaroofsystem,firstintroducedin1984.whichalsoutilizedelectronbeamcuredEPDMmembrane?Fouryearsofinstallationsdemonstratedthereliabilityanddurabilityofthetapeseamandtheefficiencyoftheseamingmethodtotheroofingapplicator.Manyoftheroofsareapproaching20yearsofmaintenance-freewatertightserviceandmanymoreyearsareexpected?Today,fullycuredpressure-sensitivetapehasfoundconsiderableapplicationinfieldseamsofEPDMsingle-plymembraneandinaccessoryconstructionssuchaspressure-sensitiveflashing,pourablesealerpockets,andcorners?RoofEnvironmentTheoverallroofenvironmentcanbebrokendownintotwocomponents?TheyaretheApplicationEnvironmentandtheServiceEnvironment.TheApplicationEnvironmentisdefinedastheambientconditionsthatthefieldspliceisexposedtoduringandimmediatelyafterassembly.TheServiceEnvironmentisdefinedastherooftopconditionsthatthefieldspliceisexposedtoduringitsusefullifetime?Bothenvironmentshaveadirectaffectonhowafieldsplicewillperform?TheingredientsoftheApplicationEnvironmentare:1?AmbientTemperature?Ingeneral,systeminstallationcanbeaccomplishedanytimeofyearinanyclimate?Applicationtemperaturemightrangefromlessthan0°F(-17.7°C)toover100°F(38°C).SubstrateTemperature-Onahot,sunnydayinArizona,ablackEPDMmembranecanbeashotas200°F(93°C).OnacleardayinDuluth.MNinJanuary,themembranewillstillbewarmtothetouch?Humidity-Thisisnotreallyafactorfortapes,butcanaffectthedryingofsolvent-basedcleanersandprimers.Ifthetemperatureisatornearthedewpoint,thematerialwilldryveryslowlyorpossiblynotatall.Dirt/Dcbris-Reroofingofanexistingbuildingmaygenerateasignificantamountofairbornedust.Evennewconstructioncanresultinsignificantdebrisblowingaroundontheroof.RoofTraffic?Certainroofdesignsresultinthemovementofheavy"ballastbuggies"o-^eranewlycompletedfieldsplice.ThermalShock-Rubbertemperaturesof100°F(38°)ormorecandroptobelowfreezingovernight.Wind-Notonlywillwindcontaminateacleanedsubstratewithdirt,buthighwindscanstressaroofthedayitscompleted?Precipitation-Rainandsnowaretheonlyweatherconditionsthatwillconsistentlystoparoofingproject.Ashowercanoftensurprisearoofingcrewbeforetheyhaveachancetocompletethesplicingprocess.WhenlistingtheingredientsoftheServiceEnvironment,ithastoberememberedthatthefieldsplicingmethodmustemulateallthepositivecharacteristicsoftheEPDMmembraneitself.Theseinclude:ServiceLife-BlackEPDMsystemsaregivenleak-proofwarrantiesofupto20years.Whitesystemsarewarrantedforupto15years?Waler?Thefieldsplicemustbeunaffectedbythelong-termeffectsofpondedwater,evenifthewatertemperatureisover1OOCF(38°C)?MoistureVapor-RcroofingolderbuildingswilloftentrapmoistureundertheEPDMmembranesystem?Whenmembranetemperaturesclimbto150+°F(66°C),thismoistureisconvertedtovaporandsteam?Thefieldsplicemustbeunaffectedbylong-termexposuretomoisture?Heat?Anysplicesystemmusthaveexcellentlong-termresistancetoheatdegradationandhightemperaturecreep?ThermalShock-Dailymembranetemperaturefluctuationsof100°F(38°C)ormorearetypical.Cold?Thefieldsplicemustremainflexibledownto-50°F(-46°C).BuildingMovcmcnt/McmbrancShrinkage-Overa20yearperiod,therecanbesmallbutsignificantchangesinbuildingdimensions.Also,EPDMmembranescanbeexpectedtoshrinkbyasmuchas2%overa20-yearperiod?Siainiiw-Afieldspliceinawhitemembranesystemcannotdiscoloroveritsservicelife?Fire-MostcompetitiveexposedmembranesystemscarryUnderwritersLaboratory(UL),ClassArating.Afieldsplicingmethodcannotdetractfromtheoverallflameretardanceofthesystem.Wind?Competitivemechanicallyfastenedsystems,whichrelysolelyonthefieldsplicetokeeptheminplaceonaroof,mustbecertifiedbyFactoryMutual(FM)fortheirwindperformance?Thesesystemsmustbeabletohandlewindloadsspecifiedbyparticularbuildingheightwithinageographicregionwithoutdamagetotheroof.PartofthechallengeofdesigningaroofingsystemisthattheclimateintheUnitedStatesvariesmorethananyothercountryintheworld.AroofdesignmustbeexpectedtoperforminAnchorage,Alaska：Phoenix,ArizonaorinMiami.Horida?SingloPlvEPDMRoofSystemsThreeroofingsystemscurrentlydominatetheEPDMsingle-plymarket.Thesesystemsareloose-laidballasted,fullyadheredandmechanicallyfastened?Tobetterunderstandwherethetapecanbeutilizeditisimportanttoknowthedifferencesbetweenthethreeroofingsystems.Loose-laidballastedroofingsystemsutilizeminimum45-milthicknon-reinforcedEPDMmembraneinsizesupto50feetwideby200feetlong?Inthissystemboththemembraneandacceptableunderlaymentorinsulationarcloose-laidovertheroofdeck?AdjoiningsheetsofEPDMmembranearefieldsplicedtogetherusingeitherliquidadhesiveorpressure-sensitivesplicetape?Theminimumfieldsplicewidthis3'、(75mni).Tliesplicedmembraneandinsulationarethenheldinplacewithanaverageof10poundsofballastpersquarefoot(49kg/SM).Themembranemustbecompletelycoveredbytheballast,whichcanconsistofroundedwater-worngravel,individualconcretepayersoralightweightinterlockingpave匚Onceballasted.nowindupliftforcesareabletoworkonthespliceareaoftheroof.Avariationoftheloose-laidballastedsystemistheloose-laidprotectedroofingsystemwhereextrudedpolyurethaneorpolystyreneinsulationandaprotectionfabricareplacedovertheloosemembrane?Theballastisthenappliedovertopofthefabricatthesame10poundspersquarefootrate.Afullyadheredroofingsystemincorporates60-milthicknon-reinforcedEPDMmembraneor45mil(1.14mm)or60mil(1.5mm)thickpolyesterreinforcedEPDMmembrane.Themembraneis100%adheredtoanacceptableinsulationsubstrateusinganyofanumberofsolventorwater-basedadhesives.Themembranesheetscanbeanywherefrom54''(137m)to50feetwide(15.24m)andupto200feetinlength(66m).Adjoiningsheetsofmembranearesplicedtogetherusingeitheraliquidadhesiveorapressure-sensitivesplicetape?Aswiththeballastedsystemfieldsplicesareammimumof3"(75nun)wide.Sincetheroofmembraneis100%adheredtothesubstrate,minimalstressisappliedtothesplice?Themechanicallyfastenedroofingsystemusesa45(1.14mm)or60mil(1.5mm)polyesterreinforcedEPDMmembranethatisattachedthroughapreattachedinsulationintotheroofdeck?Thisattachmentisaccomplishedbymeansofscrewtypefastenersandspecializedplateslocated6'、(150null)upto12"(300mm)oncenter(dependingonwindperformancerequirements),alongthecenterofthemembrane-to-membranesplice?Membranesheetscanbeeither7or10(2?I一3.0m)footwideandaslongas200feet(66m).Splicingandattachment,therefore,occuratevery7or10-foot(2」一3.0m)intervaldependingonthesheetsize,Inbetweenthefastenedareas,themembraneissusceptibletomovementfromwindupliftforces?Tliismembranemovementplacesagreatdealofstressonboththespliceadhesiveandonthefasteningsystem?Inordertoachievetherequiredsystemperformance,ainininiuin6-inch(150mm)widespliceisrequired?Ballasted,fullyadheredandmechanicallyfastenedsystemsareabletoutilizepressure-sensitivetapeforEPDMmembranesplicing?Theforcesofwindupliftdonotaffectthesesystems,becauseoftheirdesign.Whenwindupliftisaconcern,asitiswithamechanicallyfastenedroofsystem,thentheuseofpressure-sensitivesplicetapesrequiresanevenlyloadedspliceareawiththefasteningsystemcenteredatthemidpointofthetape?WindupliftinamechanicallyfastenedroofsystemplacesagreatdealofstressontheEPDMmembranesplice,requiringittobemuchwiderthanitisintheothersystems.SystemAccessoryProductsInadditiontosimplifyingroofEPDMmembranesplicing,pressure-sensitivetapesarealsousedtosimplifymanysingleplyroofdetailsrequiredtomakearoofsystemwatertight.Thesedetailsrangefromsealingaclusterofpipestostrippinginlengthsofmetaledging?Pressuresensitiveroofsystemaccessoryproductsincludeflashing(invariouswidths),pre-moldedpipeseals,pourablesealerpockets,insideandoutsidecorners,anduniversalsecurementstrips?Eachproductincorporatesacuredbutylorbutyl/EPDMadhesivelaminatedtoanEPDMmembraneproduct.Thisisthesameadhesivedescribedpreviouslytosplicelargemembranesheetstogetherandmustmeetpreviouslydescribedperformancerequirements.Pressure-sensitiveflashingisanominal40mil(1mm)curedorsemi-curedEPDMmembranelaminatedtoa35mil(0.875mm)curedbutylorbutyl/EPDMadhesive.Thepre-appliedadhesiveprovidestheroofingapplicatorwithreducedinstallationtimeandguaranteesaconsistentadhesiveapplication?Pressure-Sensitiveflashingisavailableinwidtlisfrom5"(125nmi)to18'、(455mm)andissuppliedinlengthsof50(15.24m)and100feet(30m).Itsusesincludeflashinggravelstops?metaledging,hardnibberedgingandseamfasteningplates?Theadhesivenotonlymustadheretotheroofmembranebutalsotometalplasticsandhardrubbe匚Pressure-sensitivepipeflashingsarepre-moldedcuredEPDMnibberwitha35milcuredbutyl(0.875mm)orbutyl/EPDMadhesivefactoryappliedtotheundersideofthepipeflashingdeckflange?Thisproductisusedtosealindividualpipes&oin1/2"(13inm)to6'、(150nun)indiameter,whichpenetratethroughthemainroofmembrane?Thepressure-sensitiveadhesiveisusedinplaceofliquidadhesivetosplicetheflashingtotheroofdeckmembrane?Hereagaintheproductreduceslabortimeontheroofandprovidesabetterqualityinstallation?aPressure-sensitivepourablesealerpocketsareflexibleonepieceproductsconsistingofahighdensitypolyethylenebandadheredtoanuncured40mil(1mm)EPDMmembranebymeansofacuredbutylorbutyl/EPDMadhesive.TheHDPEbandis2"(50mm)wideandisfabricatedsothattheendsclamptogethertoformthedesiredpocketdiameter.Theuncurcdmembrane/adhesivelaminateiswiderandlongerthantheHDPEbandtoallowforthepropersplicestobemadeontotheroofdeckmembraneandovertheendlap.Pressure-sensitivepourablesealerpocketsareusedinconjunctionwithapolyurethanesealanttosealaclusterofpipesorconduitsthataretooclosetogetherfortheinstallationofindividualpipeflashings?Itprovidestheroofingapplicatorwithbothlaborandmaterialcostsavingsovertheindustrystandardpourablesealerpocketinstallation.Thisuniqueapplicationalsochallengesthepressure-sensitiveadhesiveinthatitmustadheretoboththeEPDMdeckmembraneandtotheHDPEband?Theproductissuppliedinvariouslengthstomeetdiameterrequirements?Pressure-sensitiveiiiside/outsidecomersareprecutT'(175mm)by9'、(225inm)60mil(1.5nmi)uncuredEPDMmembranewithapre-applied35mil(0.875mm)curedbutylorbutyl/EPDMadhesive.ThisproductisusedontherooftosealtheEPDMmembraneatcornerswherecutsarerequiredforproperinstallation?Theuncuredportionoftheproductallowsittobeformedtothemanycontoursencounteredwhensealingeitherinsideoroutsidecorners?Theadhesivealsohastobecapableofstretchingwiththeuncuredmembraneduringtheformingprocess?Pressure-sensitivecornersgreatlysimplifythecomerdetailandprovidetheapplicatorwithlaborandmaterialcostsavings.Pressure-sensitiveunh-ersalsecurementstripsare6'、(150linn)wideuncuredorcuredreinforced45?niil(1.14nun)membranewitha3"(75mm)widebutylorbutylEPDMadhesivelaminatealongoneedge?Thisproductisusedtosecureroofmembraneinanglechangesatparapetwallsandaroundcurbunits.Thesecurementstripitselfisfastenedtotheroofdeckusingscrewtypefasteners.Theroofmembraneisthensplicedtothesecurementstripsbymeansofthepressure-sensitiveadhesiveandcontinuedasawallflashingresultinginacontinuousmembraneflashingwithoutpenetrationoftheroofmembrane?Allofthepressure-sensitiveaccessoryproductsaregearedtowardsimplifyingroofdetailsthusprovidinglaborsavingsfortheroofingapplicator.Additionally,theseproductsprovideameansforloweringvolatileorganiccompoundsontheroof.Thedevelopmentofpressure-sensitiveaccessoryproductsgreatlyenhancesanysingle-plyroofingsystem?Workcontinuesinthisareatoexpandtheproductlineevenfurther.SummaryandConclusionsAspecialfullycured,pressure-sensitivetapehasbeenusedsuccessfullyforthelasttenyearsforfieldsplicingEPDMroofingmembraneinAdheredandBallastedRoofingSystems.Thisroofingsplicetapehasbeenformulatedandvulcanizedtoresisttheelementsoftheroofenvironmentthattriestodestroytheroofmembraneandsplices(theserviceenvironment)andtoendurethoseelementspresentduringinstallationofthemembraneandformationofthesplices(theapplicationenvironment).Thepressure-sensitivetapecompoundhasalsofoundutilizationinroofingsystemswhenpre-appliedtoaccessoryproductssuchasflashing,pre-moldedpipeseals,inside/outsidecornersandsheeting?Theycanprovidetheroofingapplicatorwithbothlaborandmaterialcostsavings?Otheradvantagesofpressure-sensitivesplicetapeincludethereducedvolatileorganiccompoundscomparedtosolvent-basedadhesivesandaveryuniformbondlinethickness?TheMechanicallyFastenedRoofSystemcannowfullyrealizethebenefitsofpressure-sensitivesplicetapeduetoadvancedformulationandtesting?Inconclusion,thepressure-sensitiveaccessoryproductsincombinationwithpressure-sensitivesplicetapesareprovidingroofsyste