Ki chanjman estriktirèl ki fèt nan twal PTFE wo-tanperati pandan pwosesis la aje?

PTFEhigh-temperaturefabricisacompositematerialmadebyimpregnatingorcoatingglassfiberbasefabricwithpolytetrafluoroethylene(PTFE).

Endèkspozisyon pwolonje nan tanperati wo, kondisyon tèmo-oksidatif, tradisyon iltravyolèt, ak estrès mekanik, estrikti li sibi chanjman aje irevokabl soti nan molekilè a nan nivo makwoskopik la.

I.MicrostructuralChangeinthePTFECoating

Molecularchaindegradationandoxidation: Thecarbon-fluorinemainchainundergoeschainscission,depolymerization,andoxidation,resultinginadecreaseinmolecularweightandtheformationofpolargroupssuchascarbonylandcarboxylgroupsatchainends.Thisincreasessurfaceenergyandreducesnon-stickpropertiesandhydrophobicity.

Changesincrystallinity: Shortchainsegmentsundergosecondarycrystallization.Intheearlystage,crystallinityrisesannormally,coatingthecoatingtobecomeharderandmorebrittle.Asdegradationintensifies,thecrystallineregionsredstroyedandthestructure collapses.

Deteriorationofmicroscopicmorphology: Degradationandshrinkagestressgeneratenumerousmicro-cracksandpinholes,formingcorrosionchannels.Inseverecases,thecoatingsurfacepowdersandPTFEparticlesdetach.

II.Chanjman Struktirèl Nan Substrat Fib Vè ak Entèfas

Failureoffibersizing/couplingagents: Silancouplingagentsororganicsizingagentsontheglassfibersurfacedecomposeandcarbonizeathighttemperaturesfirst,causingthelossofchemicalbondingandmechanicalinterlockingforcesbetweenPTFEandtheglassfiber.

Interfacialdebondinganddelamination: Afterinterfacialfailure,thedifferenceinthermalexpansioncoefficientsbetweenPTFEandglassfibergeneratesthermalstress,leadingtopeelingandseparationofthecoatingfromthefabric,resultinginblistering,delamination,andexposedwhiteareas.

Degradationoftheglassfiberitself: Hightemperaturesandalkalinesubstanceserodetheglassnetwork,sa ki lakòz micro-cracksonthefibersurfaceandbrittlement.An tan,alkalimetaloxidesintheglassfiberprecipitateathighttemperatures,inducingstrescorrosionthatreverselydamagestheinterfaceandacceleratesstrengthloss.

III.Chanjman nan Estrikti ak Aparans Makwoskopik

Chanjman koulè: Thematerialgraduallychangesfromwhiteoritsnaturalcolortobeige,mawon,ouvenblack,resultingfromcarbonizationoftheinterfacialayer,adhesionoforganiccocontaminants,andressidualproductsfromminorPTFEdegradation.

Dimensionalstabilityandflatness: Shrinkagedeformationoccurs,thefabricsurfacebecomesuneven,andedgescurl.Thisistheresultofmolecularchaindisorientationandinterfacialstressrelease.

Surfaceroughening: Thesmoothfeeldisappears,andthesurfacebecomesroughandlosesitsgloss.Inseverecases, powdering isobservedwhentouched,indicatingPTFEpowdering.

Mechanicalstructuralcollapse: Thematerialcompletelylosesflexibilityandbreaksuponfolding.Thecoatingextensivelyseparatesfromthebasefabric,resultingintotallossoffunctionality.

IV.Esans Pwosesis Aje

Chanjman ki anwo yo konstitye yon pwosesis pwogresif 'degradasyon kouch →echèk entèfas →degradasyon substrate.'PTFE pèdi inertness epi devlope fant;koòdone fib vè a detwi anvan kò fib la li menm, ki mennen nan delaminasyon; Mately,theentirestructurebecomesfragil,poud,anddisintegrates.Controllingoperatingtemperature,evitingthermalshockfromrapidheatingandcooling,andpreventingcontactwithasidsandalkaliscaneffectively ralentitthisstructuralagingprocess.

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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