Labẹ iwọn otutu ti o ga, awọn ipo oxidative, ultravioletradiation, ati atupa ẹrọ, eto rẹ labẹ awọn iyipada ti o ṣee ṣe iyipada lati inu moleculartothemacroscopiclevel.
I.MicrostructuralChangesinthePTFECoating
Molecularchaindegradationandoxidation: Thecarbon-fluorinemainchain ti o wa labẹ iṣakoso,depolymerization,atioxidation,abajade ni idinku ninu iwuwo-ara ati iṣelọpọ ti awọn ẹgbẹ pọọlasuchascarbonylandcarboxylgroupschainends
Awọn iyipada sicrystallinity: Awọn ọna kukuru labẹ ile-ẹkọ giga ile-ẹkọ giga. Ni ipele ibẹrẹ, crystallinity dide ni deede, eyiti o jẹ ki ibora di lile ati diẹ sii.
Idibajẹ ti microscopicmorphology: Ibajẹ ati isunku ti ipilẹṣẹ lọpọlọpọ micro-cracks andpinholes, awọn ikanni ibaje.
Ikuna awọn ifisilẹ/awọn asopọpọ: Silanecouplingagentsororganicizingagentsontheglassfibersurface decompose andcarbonizeemperatures first,nigbamii ipadanu ti kemikali ati ẹrọ idawọle laarin PTFE ati gilaasifiber.
Interfacialdebonding ati delamination: Lẹhin ikuna, iyipada ninu awọn ilodisi iwọn otutu laarin PTFE ati gilaasifibergene nfa aapọn, itọka itọka ati ipinya ti ẹṣọ lati ile-iṣẹ iṣelọpọ, abajade ni blistering, delamination, awọn agbegbe ti a fiweranṣẹ.
Ibajẹ ti gilasi fiberiti funrarẹ: iwọn otutu ati awọn ohun elo ti o nbọ nẹtiwọki nẹtiwọki gilasi, ti o nfa micro-cracksonfiber lori oju-ara ati idamu.
III.AyipadaMacroscopicStructureati Irisi
Iyipada awọ: Awọn ohun elo diẹdiẹ yipada lati funfunoritsnatural awọ sibeige, brown,orevenblack, Abajade lati inu erogba ti inu ile-ipin, ifaramọ ti awọn ohun elo eleto, ati awọn ọja ti o ku lati ibaje PTFE.
Iduroṣinṣin iwọn ati aipin: isunmọ alaye n ṣẹlẹ, oju-ọrun ti o wa ni oju-ọrun ti di aiṣedeede, ati idasikẹ.
Surfaceroughening: Thesmoothfeeldisappears,ati awọn oju-oju diroughandlosesitsgloss.Inseverecases,powderingisorabi nigbati o ba farakàn, nfihan PTFEpowdering.
Mechanicalstructural Collapse: Thematerialcompletelylossflexibility and breaksuponfolding.Thecoatingextensively yaparate from thebasefabric, Abajade sinutotallossof iṣẹ ṣiṣe.
IV.Eyi ti Ilana Igbagbo
Theabovechangesconstituteaprogressiveprocessiveprocessof'coating degeneration→interfacialfailure→ substratedegradation.'PTFElosesitsinertnessanddevelopscracks;glassfiberinterface ti bajẹ niwajufiberbodyitself,asiwaju latidelamination;ultiti mately, gbogbo eto di brittle, lulú, ati awọn tituka. Ṣiṣakoso awọn iwọn otutu ti n ṣiṣẹ, yago fun gbigbona gbigbona lati gbigbona gbigbona ati itutu agbaiye, ati idilọwọ awọn olubasọrọ pẹlu acidsandalkaliskan ti o munadoko ti o lọ silẹ ilana ilana imudara.
Ti o ba fẹ lati ni imọ siwaju sii nipa awọn alaye alaye, awọn oju iṣẹlẹ ohun elo, ati awọn aṣayan isọdi fun awọn ọja ni kikun — pẹlu PTFEhigh-Temperaturefabric, PTFEhigh-Temperaturetape, Teflonhigh -awọn igbanu iwọn otutu, awọn ẹrọ afọwọṣe ti ko ni iran, PTFEfabric-apa kan, awọn iyipada iwọn otutu giga, ati gilaasi iwọn otutu giga - jọwọ lero ọfẹ lati kan si nipasẹ awọn ikanni atẹle:
