JiangsuTeflonHigh-TemperatureClothManufacturer-JiangsuAokaiNewMaterialTechnologyCo., Ltd.remindsthatthisisessentiallyamatterofsynergybetweenporousstructureandsurface/bulkfunctionalproperties.
1.SourcesoftheConflictAmongMicroporousStructureandProperties Airpermeability yuav tsum tau interconnectedopenpores,withgaspassingthroughtortuouschannels.Thepermeabilityrateisproportionaltothesquareoftheporediameterandtheporosity,andinverselyproportionaltothetortuosityoftheporechannels. Rwb thaiv tsev (dielectric zog) reliesonthematerial'sdensity.Introducingmicroporesisequivalenttomixingair(withalowbreakdownfieldstrengthof~3kV/mm) rau hauv PTFEmatrix,andopenporesprovidepotentialpathwaysforpartialdischargeandcreepagetracking.Thehighertheporosityandthestraighterthemorethrough.
Airpermeabilityvs.non-stickproperty: Thenon-stickpropertyoriginates los ntawm PTFE'sextremelylowsurfaceenergy(~18mN/m)andsmoothsurface.Microporesincreasesurfaceroughnessandtheactualcontactarea;moltenmaterialsorviscousmediamaypen etratethemicropores, tsim 'mechanicalinterlocking'thatinsteadcausesadhesion.Yog li ntawd, cov ntaub ntawv mustsimultaneouslyachieveairpermeabilityandsurfaceresistancetowettingand penetration.
2.CoreApproachtoBalancedDesign:SynergisticModulationofMesoscopicStructuralParameters Thekeytobalanceisnotsacrificingonepropertyforanther, butrathercoordinatelytuningporesize,porosity,poregradient,tortuosity,andsurfacetreatmenttosatisfysultlythree
2.1ControltheAveragePoreDiameter(0.1–2μm)andNarrowPoreSizeDistribution forinsulation: Thaumtheporesizeismuchsmallerthantheelectronmeanfreepathandtheinitiationsizeforpartialdischarge,breakdownintheairgapsstillfollowsPaschen'slaw;txawm li cas los xij,extremelyfinemicropores(submicr onscale) tuaj yeem ua qhov tseem ceeb nce ntxiv rau qhov tawg voltage.Studiesshow thatwhentheaverageporediameteriskeptbelow0.5μm, theDCbreakdownstrengthofa50-μm-thickePTFEfilmcanstillreachabove40kV/mm.Fornon-stickperformance: Thaumtheporesizeissmallerthanthecritical penetrationsizedetermined bythemolecular chainradiusofgyrationorthemeltviscosityofhot-meltadhesives (piv txwv li, PE, PP), themeltcannotinfiltratethemicropores.Itonlycontactstherais edPTFEfibrilsonthesurface, resultinginanextremelysmallactualcontactarea,sothenon-stickpropertyremainsunaffected. Feem ntau, surfaceporessmallerthan0.5μmcaneffectivelypreventpenetrationbymosthot-meltadhesives.
2.2ControlPorosityinaModerateRange(50%–70%) Toolowporosity (<30%) tsis tuaj yeem ua kom muaj huab cua permeability; siab dhau (> 80%) txo cov ntsiab lus ntawm cov khoom hnyav heev, ua rau muaj kev puas tsuaj rau cov ntaub ntawv insulating thiab cov cuab yeej siv tshuab. Ataporosityaround 60%, theairpermeability (Gurleyvalue) tuaj yeem tswj tau nyob rau hauv 20–100s / 100cc,whileafilm0.13mmthickcanmaintainadielectricstrengthof≥2kV, kev sib ntsibmostheat-sealinginsulationrequirements.
2.3AdoptaHigh-Tortuosity3DNetworkPoreStructure(asusedbyJiangsuTeflonHigh-TemperatureClothManufacturer) Lub 'node-fibril'structureofePTFEinherentlyformshightortuosity(τ≈2.54).Gasesmustpassthroughtortuouspaths, whichextendstheairbreakdownpathandeffectivelysuppressestheformationof straight-throughdischargechannels. Hightortuosityalsreducesthedependenceofairpermeabilityonporesizefromsquarerelationshiptoaweakerone, cia me ntsis loj duaporestobeusedinexchangeforhigherinsulationreliability.
2.4ConstructanAsymmetricGradientPoreStructure–DenseSurface, PorousInterior Densesurfaceskinlayer (thickness1–5μm) Los ntawm heatcalendering, luv luv-termhigh-temperaturesintering, orcoating withanultra-thinfluoropolymer (xws li, TeflonAF), qhov kev sib cuag nrog lub chaw ua hauj lwm ntawm cov khoom ua tau raws li zoo ib yam ntawm cov zaj duab xis. Thebulkretainsahighly porous breathablelayer: Hauv qab cov tawv nqaij, cov ntaub ntawv tseem tsis tau muaj kev sib txuas ntawm cov micropores zoo heev.
Cov nyhuv: Insulation isdominated bythedenselayer, non-stickperformanceisensuredbythedenselayer'sextremelylowsurfaceenergyandultra-finepores,andairpermeabilityreliesoninterlayerdiffus ionandedgeconvection.Whenusedonheat-sealingmachines, thetapesurfacedoesnot sticktothemoltenfilm,whilemoistureandvolatilescanbeexpelledthroughtheedgesofthemicroporouslayer.
2.5SurfacePost-Kev Kho Mob: Super-Oleophobic/HydrophobicModificationWithoutPoreBlockage Byplasmagrafting ntawm fluorinatedmonomersorvapordepositionofanextremelythin (<50nm) perfluorinatedlayer, coating nrog txawm qis qis surfaceenergy canbeformedontheinnerwallsofthemicropores.Qhov txuas ntxiv tiv thaiv kev sib tsoo ntawm cov khoom tsis muaj kev cuam tshuam ntawm lub hauv ntej. Qhov kev kho mob no muaj kev cuam tshuam nrog 'micro/nanodual-phobicity,'upgradingthenon-stickpropertytoanti-soiling, withalmostnolossinairpermeability. PTFEtape (0.13mmthick) asanexample:
Parameter
Tus nqi
Cua permeability (Gurley)
30-60 s / 100 cc - ua tau raws li qhov yuav tsum tau ua rau cov cua sov sealing, lub tshuab nqus tsev lamination, thiab lwm yam.
Breakdown voltage
≥ 3 kV (DC) - haum rau cov hluav taws xob hluav taws xob qis rau nruab nrab
Nto tsis-stick tev quab yuam (tiv thaiv acrylic nplaum, EVA kub-melt nplaum)
<0.1 N / cm - tsis muaj qhov seem tom qab siv qhov kub thiab txias
Kub tiv taus
Kev siv tsis tu ncua ntawm -70 ° C txog 260 ° C
4. Cov lus xaus ThebalanceofthemicroporousstructureinbreathableTeflonhigh-temperaturetapeisessially ua tiav los ntawm morphologicalengineering , faib rau peb yam khoom sib txawv ntawm cov txheej txheem:
Insulation andnon-stickperformance areprovided bythenear-surfacedenseskinorultra-finemicropores;
Airpermeability yog siv los ntawm kev sib txuas hauv nruab nrab, tortuousmacroporousnetwork. Aslongasthesurfaceporesizeiscontrolledinthesubmicronrange, theinternalporosityandtortuosity arepreciselycombined with agradientstructure,thetapecansimultaneouslyachievegoodairpermeability, insulation,andnon-stickperformancecrossawiderangeofspecifications.
Cov ntaub ntawv saum toj no yog muab los ntawm JiangsuAokaiNewMaterialTechnology 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_var158_1!~
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