Yuav ua li cas yog PTFE txheej bonded rau fiberglass ntaub substrate nyob rau hauv Teflon high-temperature ntaub?

PTFECoatingonTeflonHigh-TemperatureClothAdheretoFiberglass Fabric li cas?

PTFE (polytetrafluoroethylene) hasanextremelylowsurfaceenergyandisfamouslyknownasa'non-stick' khoom.Yog li ntawd, nws tsis tuaj yeem ncaj qha chemicallybondedtofiberglassfabriclikeordinarycoatings.AsanalyzedbyTeflonhigh-temperaturecl Othmanufacturer-JiangsuAokaiNewMaterialTechnology Co., Ltd., kev sib koom ua ke ntawm kev sib koom ua ke feem ntau tau ua tiav los ntawm kev siv lub cev thiab kev siv tshuab cuam tshuam, ntxiv los ntawm kev siv tshuaj lom neeg ua kom sov-meltadhesioncompositeeffects.

Cov txheej txheem tshwj xeeb rau kev sib khi Teflonhigh-temperaturecloth feem ntau suav nrog cov hauv qab no:

1.MechanicalInterlocking (PhysicalBonding) Cov txheej txheem no yog qhov tseem ceeb tshaj plaws.Fiberglassfabricitselfisaporous textile.Thaum PTFEemulsionordispersionisimpregnatedorcoatedontothefiberglassfabric, PTFEpenetratesintothegapsandintersectionpoints nruab nrab ntawm cov fibers.Afterdryingandhigh-temperatures intering (kwv yees li 360–400 ° C), the PTFEparticlesmeltintoacontinuousfilm, khov kho cov fiberbundles zoo li suav tsis txheeb'anchorhooks.'Txawm li cas los xij, kev cia siab rau txoj kev nostillresultsinlimitedbondingstrength, thiab generalallyrequiressupplementary.

2.SilaneCouplingAgentPretreatment(ChemicalBridging)

Qhov no yog qhov tseem ceeb tshaj plaws rau kev ua tau zoo PTFEfiberglassfabrics.Thesurfaceofthefiberglassfabricisfirsttreated withasilanecouplingagent (suchasaminosilane, epoxysilane, thiab lwm yam.):

Oneendofthesilane (siloxygroup), tom qab hydrolysis, canchemicallybond nrog cov hydroxylgroups (-OH) nyob rau saum npoo ntawm cov iav fibers;

Lwm yam, bearingorganicfunctionalgroups, cancross-linkorstronglyadsorbwiththeadhesivecomponentsinthefluorinatedprimerduringsubsequentimpregnationorcoating.Thiseffectivelybuildsa'molecularbridge' between theorganicandinorganicinterfaces.

3.ChemicalPrimerTransitionLayer

Directlycoating PTFEresultsinpooradhesionaftersintering, soadedicatedprimerisusuallyapplied ua ntej rauthefiberglassfabric.Thisprimerlayergenerally muaj:

Adhesiveresins: Suchaspolyamide-imide (PAI), polyphenylenesulfide (PPS), polyethersulfone (PES), orpolyetheretherketone (PEEK), uas muaj cov dej zoo thiab muaj zog adhesiontoglassfibers, thiab tuaj yeem tiv taus qhov kub thiab txias PTFEs interingprocess.

PTFEmicropowder: ToensurethatheprimerandthefinalPTFEtoplayercanfuse ua ke.

Cov txheej txheem no tau txais kev sib txuas ntawm cov tshuaj lom neeg thiab lub cev sib cuam tshuam nrog cov coupling-tus neeg saib xyuas-kho fiberglassfabric, formingarobusttransitionlayer.The PTFEtoplayerthenfuses nrog PTFEcomponentintheprimerduringsintering, yog li ntawd ncaj qha ua tiav highadhesionstrength.

4.Hot-MeltAdhesiveFilmLamination (LaminationMethod) Txoj kev no, ua haujlwm los ntawm JiangsuAokaiNewMaterialTechnology Co., Ltd., isusedtobondpre-formed, tuabPTFEfilmstofiberglassfabric.Vim tias PTFEhasanextremelyhighmeltviscosity(kwv yees ately10⊃1;⁰–10⊃1;⊃2;Pa·s), ithardlyflowsevenwhenheatedaboveitsmeltingpoint,sodirecthot-pressbondingisnotpossible.Amelt-processable'kub-meltadhesive'mustbeused, feem ntau: FEP (fluorinatedethylenepropylene) lossis PFA (perfluoroalkoxy) zaj duab xis PTFE (kwv yees li 260-310 ° C). Tom qab melting, lawv canwetthefiberglassfabricandinter-diffuse/meltwiththe PTFEfil msurface.Intheprocess, the FEP/PFAfilmisplaced betweenweenthe PTFEfilmandthefiberglassfabric,heatedandpressed,andaftercooling,astrongbondisformed.

5.GradientStructureviaMultipleImpregnationandSinteringCycles

Muaj ntau qhov kub thiab txias conveyorbeltsandarchitecturalmembranematerials yog tsim los ntawm kev siv ntau-impregnation txheej txheem: ThefirstimpregnationusesadilutePTFEdispersioncontainingbindersandcouplingagents, tso cai rau covprimertopenetratedeepintothefiberbundles. Aftersintering, multiplesubsequentimpregnationswithpurePTFEemulsionandsuccessivesinteringstepsarecarriedout, ua tau nce siab purity ntawmPTFEonthesurface. Qhov no tsim kom muaj kev hloov pauv hloov pauv los ntawm cov fiberglassfabrictothepurePTFE, nrog rau kev ntxhov siab hauv sab hauv thiab muaj zog sib khi.

Xaus

Insummary, thebonding betweenweenthePTFEcoatingandthefiberglassfabricinTeflonhigh-temperatureclothisnotsimply'gluing'–itisacomplex(systematicengineeringprocess):throughphysicalanchoringtotakerootinthefibers, throughcou plingagentsandprimerstoachievechemicalbondingandtransition,andthroughhigh-temperaturesinteringtocompletethemelt-integrationofthefilmlayers.IfonlypurePTFEweredirectlycoated,theentirelayerwouldpeeloffwithasingletear.

Cov ntaub ntawv saum toj no yog muab los ntawmJiangsuAokaiNewMaterialTechnology Co., Ltd. Yog tias koj xav paub ntxiv txog cov ncauj lus kom ntxaws, cov txheej txheem kev thov, thiab kev daws teeb meem rau peb cov khoom lag luam - suav nrog Teflonhigh-temperaturecloth, Teflonhigh-temperaturetap e, Teflonhigh-temperaturemeshbelts, seamlessbelts forlaminatingmachines, ib leeg-sided PTFEcloth, high-temperatureconveyorbelts, high-temperaturefiberglasscloth, thiab ntau ntxiv-pleasefeelfreetocontactus: ~!phoenix_var143_1!~

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