PTFE high-temperature fabric-ah hian kum upa lam a nih laiin eng structural change nge a awm?

PTFEhigh-temperature fabric chu polytetrafluoroethylene(PTFE) hmanga glassfiberbasefabric impregnating emaw coating emawa siamcompositematerial a ni.

Hun rei tak temperature sang, thermo-oxidativecondition, ultravioletradiation, leh mechanicalstress-a a awm loh chuan a structure chu molecular atanga macroscopiclevel-ah agingaging changes reversible a tawk thin.PTFEhigh-temperaturefabricca siamtute chuan he process hi a hnuaia mi ang hian an hrethiam lo:

I.PTFECoating-a microstructural-a inthlak danglamna

Molecularchaindegradation leh oxidation: Carbon-fluorine chu chainscission, depolymerization, leh oxidation hnuaiah a awm a, chu chuan molecularweight a tihhniam a, polargroup siam a ni a, chu chu scarbonylandcarboxylgroup atchainends a ni.Hei hian surfaceenergy a tipung a, non-stick property leh hydrophobicity a ti tlem bawk.

Crystallinity-a inthlak danglamna: Secondarycrystallization hnuaia shortchains segment-te.Stage tir lamah crystallinity chu a pangngai lo takin a sang a, chu chuan coating chu a khauh a, a chhe zawk a ni.

Microscopicmorphology chhe zel: Degradation lehshrinkages tress chuan micro-crack leh pinhole tam tak a siam a, corrosionchannel a siam a.A nasat chuan coatingsurfacepowder lehPTFEparticle te chu a inthen thin.

II.GlassFiberSubstrate leh Interface-a structure inthlak danglamna

Failureoffibersizing/couplingagents: Silanecouplingagent emaw,glassfibersurface-a organic-agent-te chu temperature sang takah a chhe vek a, a carbonize hmasa a, chu chuan PTFE leh glassfiber inkara chemical bonding leh mechanicalinterlockingforce hloh a thlen a ni.

Interfacialdebondingandlamination: Interfacialfailure hnuah,PTFE leh glassfiber inkara thermalexpansioncoefficient danglamna chuan thermalstress a siam a, chu chuan topeeling leh fabric atanga coating inthenna a thlen a, chu chuan blistering, delamination, leh hmun var tarlan te a thlen a ni.

Glassfiber ngei pawh a chhe: Temperature sang leh kalinesubstance chuan glassnetwork a tichhe a, fibersurface-ah micro-crack a siam a, a ti chhe thei bawk.Hetih lai hian, glassfiber-a alkalimetaloxides-te chuan temperature sang takah a tlakbuak a, stress a tichhe a, chu chuan interface a tichhe nasa hle a, chakna a tichhe bawk.

III.MacroscopicStructure leh A lan danah inthlak danglamna

Colorchange: Material chu a danglam zauh zauh a, chu chu naturalcolor aangin beige,brown,orvenblack-ah a inthlak a, chu chu interfaciallayer-a carbonization, adhesionoforganiccontaminants, leh PTFEdegradation-a adresidualproducts aanga lo chhuak a ni.

Dimensionalstability leh flatness: Shrinkagedeformation a lo awm a, fabricsurface chu a inang lo a, a dedgescurl a ni.Hei hi molecularchaindisorientation leh interfacialstressrelease atanga lo chhuak a ni.

Surfaceroughening: Thesmoothfeel chu a bo a, a surface chu a lo awm a, a loseitsgloss.A nasat loh chuan powdering hi khawih a nih chuan hmuh a ni a,PTFEpowdering a ni tih a tilang.

Mechanicalstructuralcollapse: Material hian folding-ah flexibility a hloh vek a, a chhe vek bawk.Coating hi basefabric aangin nasa takin a inthen a, chu chuan functionality a nei lo vek a ni.

IV.AgingProcess-a thil pawimawh ber

A chunga kan sawi takte hi 'coatingdegradation→interfacialfailure→substratedegradation'progressive process a ni.'PTFElose sinertnessand developscracks;glassfiberinterface chu fiber taksa ngei hmaa tihchhiat a ni a, delamination;ulti mately,theentirestructurebecomesbrittle,powders,anddisintegrates.Operatingtemperatures control-na, rang leh cooling atanga thermalshock pumpelh, leh cidsandalkali nena inbiak lohna venna hian he structureagingprocess hi a hlawhtling takin a ti slow thei a ni.

A chunga thu hriatte hi a pe a niJiangsuOKThil tharTechnologyCo.,Ltd.

Kan thil siam chi hrang hrang—PTFEhigh-temperaturefabric, PTFEhigh-temperaturetape,Teflonhigh te pawh tel—a chipchiar zawka specification, application scenario, leh customizationoption chungchang zir belh i duh chuan -temperaturemeshbelts,seamlessbeltingforadhesivepresses,single-sidedPTFEfabric,temperature sang conveyorbelt,leh temperature sang tak fiberglassfabric—a hnuaia channel hmang hian zalen takin i inhriat theih nan:

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