Modèl chanjman nan fòs limenm nan kouch adezif Teflon wo-tanperati tep apre aje segondè-tanperati.

I.PatternofChangeinAdhesiveLayerCohesionUnderHigh-TemperatureAging

Etap apre gerizon: Nan premye etap ekspoze nan tanperati ki wo (egzanp, 200–260 °C), gwoup reyaktif rezidyèl yo kontinye ap kwaze, ki mennen nan ogmante koezyon an.

Stableequilibriumstage: Cross-linkingapproachescompletion,andcohesionremainsstableoveralongperiod.Athisstage,thetapeexhibitsoptimalperformanceandcanwithstandcontinuousoperationatitsdesigntemperature.

Degradationanddeclinestage: Underexcessivetimeortemperature,themainchainundergoesdegradation, sa ki lakòzcohesiontodecreasecontinuously.Theadhesivelayersoftensandbecomestacky,makingithighlysusceptibletocohesivefailureandsqueeze-out.

II.RootCausesofCohesiveFailureandAdhesive Squeeze-Out

Rootcauseofcohesivefailure: Whenthecohesivestrengthoftheadhesivelayerislowerthantheinterfacialadhesionstrength,internalteringoccurs,levingadhesiveresidue.Thisstemsfrominsufficientcohesionorhigh-temperaturedegradation.

Rootcauseofsqueeze-out: Atelevatedtemperatus,modulusdiminue,andtheadhesivelayerundergoescoldflow,beingextrudedfromtheedgesbythermalstress.Theunderlyingcausesareinsufficientcross-linkingdensityorexcessivemolecularchainmobility.

Relasyon ant de: Degradasyon alontèm agrave tou de pwoblèm nan menm tan an;

III.PrevansyonAtravèFòmilasyonAdezif ak Pwosesis

Formulationdesign: Usehigh-phenylsilicone, employaddition-curingsystemswithpresecross-linkingcontrol,balanceMQresinratios,addreinforcingfillers,andeliminatelow-molecular-weightplasticizers.

Coatingandcuring: Implementthoroughpost-curingtreatmenttoreremovelow-molecular-weightsubstancesandpreventsqueeze-outduringthefirstheateexposition.

Estrikti adhesive: Theadhesivethicknessshouldbekeptthin(≤25μm), anda0.5–1mmadhesive-freesafetymarginshouldbeprovidedtheedgestophysicallyblocksqueeze-out.

IV.Prevansyon Atravè Substrat ak Kondisyon Fonksyònman

Substrateanchoring: PTFEfilmequiresetchingorplasmattreatment,combinewiththeprimertomatchinterfasciaandcohesivestforces,preventingtropeanchoringthatcouldleadtocohesivefailure.

Temperaturecontrol: Strictlyfollowtheratedtemperaturespecificationsforuse,aplikegradualstepwiseheating,andavoidthermalshock.

Depo ak manyen: Sere yon tanperati ki ba pou anpeche koule frèt, pèmèt kasèt la tounen tanperati chanm anvan w itilize, epi asire sifas lyezon an pwòp epi san papye.

Enfòmasyon ki pi wo yo bayJiangsuOKNewMaterialTechnologyCo.,Ltd.

Si ou ta renmen aprann plis sou spesifikasyon detaye yo, senaryo aplikasyon yo, ak opsyon personnalisation pou tout seri pwodwi yo—ki gen ladan twal PTFE wo tanperati, PTFE tape segondè tanperati, teflon segondè. -tanperati meshbelts,seamlessbeltingforadhesivepresses,yon sèl-sidedPTFEfabric,wo-tanperaticonveyorbelts,andhigh-temperaturefiberglassfabric-tanpri, ezite kontaktekthroughthefollowingchannels:

Liy dirèk sèvis:

Mr.Guo: 18944819998

Mr.Liu: 13705266308

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