PTFE ay-tɛmpracha klos na kɔmpɔzit fɔ PTFE kɔtin ɛn fayv glas sabstret. we dεn εkspos to tεmprachכ we de go כp, dis mεtirial nכ de jכs 'mεlt' na wan tεm – i de כnda wan siriכs prכgrεsiv fכshal εn kεmikכl chenj dεm akraos fכ difrεnt tεmprachכ rεnj dεm.
Frɔm maykro-krak na 260°C to kɔmplit dikɔmpɔzishɔn na 500°C+, di strɔkchɔral chenj dɛn de afɛkt di PTFE kɔtin fɔs, dɔn di fayv glas sabstret. Fɔ ɔndastand dɛn stej ya impɔtant fɔ mek yu ebul fɔ wok sef ɛn yu go abop pan.
Aokai PTFE dɔn analayz di tɛmral bihayvya fɔ PTFE-kɔt fabrik dɛn akɔdin to ɔl di tɛmpracha rɛnj dɛn. Dis gayd de ɛksplen di 4 ki strɔkchɔral chenj stej dɛm ɛn gi prɛktikal tɛmpracha limit.
Lɔng-Tɛm Savis Tɛmpratura Rɛnj – Dɔŋ lɛk 260°C
di ovala strכkchכ de stכp rεlatεvli stebul we slo, maykroskכpik כltεrayshכn dεm de tek ples sכmtεm.
lכng tεm tεmכl εkspכzכn de trigεr sכmtεm muvmεnt fכ di polimכr mכlikul chen dεm εn i de rεs di kristaliniti sכmtεm. So di kɔtin kin tɔn smɔl smɔl wit inkris sɔfays hadnɛs. Dis na slo prɔses – we dɛn kin mɛzhɔ afta ɔndrɛd ɔ tawzin awa.
2. Akyumyuleshכn כf intafεshal tεmral strεs
PTFE gɛt wan tɛmal-ɛkspɛnshɔn kɔfishin we na lɛk 10×10−5/°C , we fa fawe pas fayv glas we de lɛk 5×10−6/°C . ripit tεmכl-kol sayklεshכn de jεnarεt intanεt strεs na di kכt-sכbstεt bכnda, we kin fכm maykro-krak ova tεm. Dis na di praymar ej mεkanism insay di sef כpεrayshכn rεnj.
3. Volatilayzεshכn כf rεsidyual aditiv dεm
di rεmεnεnt sכfaynt dεm εn di wetin ejen dεm we lεf frכm prodakshכn de rɔtin smɔl smɔl, we de mek di fabrik sεf dak smɔl. Dis nɔ kin bad bɔt i kin sho se di tin we dɛn de yuz de ol.
Tɛmpratura we de kam nia ɛn pas di Mɛlt Point – Arawnd 327°C
wans PTFE rich in mεlt-pכynt tεmprachכ, dramatik fכshal-strכkchכral transfכmeshכn de apin.
1. Krɔs-rijyɔn mɛlt
sεmi-kristalin opak milky-wayt PTFE de kכnvכlt to wan amorphous jel-layk likwid we kכmpan wit shap vכlyum εkspεnsכn . Di kɔtin kin lɔs ɔl di mɛkanikal trɛnk ɛn bigin fɔ sof ɛn flɔ. na dis tεm, di fabrik de lכs in dimεnshכnal stεbiliti εn strכkchכral integriti.
2. Delamination bitwin kotin ɛn sabstret
Ridyus kohεsiv fכs εn tεmral-εkspεns-indyus strεs de mek mכlt PTFE fכ blista, pכl כf, εn fכ fכlכ away frכm di fayv glas fabrik, we de rizulta in kכmכpכsit dεlaminεshכn εn strכkchכral fεil. Di say we nɔ de stik kin pwɛl bikɔs ɔf dat. Wans delamination apin, i nɔ go ebul fɔ chenj.
3. Fayba glas de mek in skel strɔkchɔ kɔntinyu fɔ de
Di fayv glas fabrik de stil stebul dimɛnshɔnal wan na dis stej. If di protεktiv PTFE layεr nכ de, di bare glas filament dεm kin bi vulnerable fכ כksidεshכn εn kεmikכl eroshכn.
Aokai PTFE wɔnin: Ivin shɔt ɛkskurshɔn ɔp 327°C kin mek dɛn nɔ ebul fɔ chenj di delamination. Di klos kin luk intakt we i kol, bɔt di PTFE kɔtin dɔn separet fɔ ɔltɛm frɔm di fayv glas, we dɔn lɔs ɔl di mɛkanikal intɛgriti.
Di biginin fɔ Tɛmral Dikɔmpɔzishɔn – 400°C to 500°C
PTFE mכlikul bakbon dεm de stat kεmikכl klivεj, we de bכn bכt irrevεrsibl strכkchכral brεkdכwn.
1. Dominant dipolimayzeshɔn riakshɔn
כnda כksijεn-fri envayroment, PTFE de כnda wan zip-tayp dεgradashכn . CC kכvalεnt bכnd dεm na di men chen de brok dכn, we de rilis gas mכnomεr dεm we fכs kכnsis fכ tεtrafluoroethylene (כva 95%) εn hεksafluoropropylene. di mכlikul wet de dכp shap shap, εn di PTFE kכt de pulvεrayz εn dispεt.
כksijεn de atak di kabכn fri radikal dεm εn i de mek tכxik gas dεm lεk kabכnayl fכrayd (COF2) εn trifluoromethane, we de kכmכn wit wan shap pכngεnt sכl smel. haydrojen fluoride (HF) εn pεrfluoroisobutylene (PFIB) kin kכmכt bak כnda sכm kכndishכn dεm.
3. Tray di kabɔn rɛsɛdyu
Pure PTFE de vaporize klos to komplit witout kabon lef. Blak diskɔlɔreshɔn pan di fabrik kin kɔmɔt frɔm kabɔnayzeshɔn pan fayv glas sayzin ɛjɛn, sɔfayz kɔntaminɛnt, ɔ smɔl smɔl komonomers insay modifyed-grɛd PTFE.
4. Bɔn-ɔf pan fayv glas sayzin ɛjɛn
כrganik sayzin ejen dεm we dεn kכt pan fayv glas filamen dεm de dכn oba 350°C. Glas filamɛnt dɛn kin lɔs fɔ adhesion, we kin mek di klos flɔflɔ ɛn i kin izi fɔ mek i fuz.
Di PTFE kotin don komplitli vanish, lef onli di bare fiberglass substrate we de bia kontiniu hai-temperature lod.
1. Softin fɔ E-glas fayba
Standart E-glas fayba gɛt sɔftin pɔynt we na lɛk 840°C . Bɔt pan ɔl dat, in tɛnsiɛl trɛnk de dɔŋ mak wan pas 500°C. We dɛn ɔt am pas 800°C, di wan ol fayv glas klos kin sof, difɔm, ɛn sag ɛn i kin lɔs di strɔkchɔral sɔpɔt kapasiti.
2. Ay-tɛmpracha krip ɛn devitrification
fכ lכng hεy tεmprachכ εkspכzכn de trigεr krip-strεch fכ glas fayb dεm, we de fכlכ devitrifyεshכn εn pulvεrayzeshכn we fulכp kכlaps di fabrik strכkchכ. na dis stej, dεn nכ de no di klos igen as tεkstil – i de bi wan lכs, fraylayz mas fכ glas fayv dεm.
Sɔmari – Tɛmpratura Stej ɛn Kritikal Limit
Tɛmpratura Rɛnj
PTFE Kotin we dɛn kɔl
Fayba Glas Sabstret
Ɔl di Fabrik Status
≤260°C na di wɔl
Slow maykro-krak, aditiv volatilayzeshɔn
Stɛdi
✅ Fɔ wok – fɔ yuz am fɔ lɔng tɛm sef
260-327°C di ples
Softening, strɛs we de gɛda
Stɛdi
⚠️ Digradɛshɔn bigin – fɔ shɔt tɛm nɔmɔ
~327°C (we de mɛlt)
Melt, delaminate, lɔs strɔkchɔ
Stɛdi
❌ Katastrofik – damej we nɔ go ebul fɔ chenj
327-400°C na di ples
Mɔlt, flɔ, lɔs kɔvarej
Stebul (bɔt nɔ gɛt protɛkshɔn) .
❌ Nɔn-fɔnshɔn – kɔtin de separet
400-500°C we de kam
I de rɔtin, i de pul pɔyzin gas dɛn
Sizing de bɔn ɔf
❌ Denja – pɔyzin fum, strɔkchɔral lɔs
>500°C na di wɔl
I dɔn go kpatakpata
I de sof >500°C, i de mɛlt >840°C
❌ Kɔmplit strɔkchɔral fayl
Aokai PTFE rikɔmɛnd fɔ strikt wan kɔntrol di lɔng tɛm ɔpreshɔn tɛmpracha dɔŋ 260°C ɛn limit fɔ shɔt tɛm pik to 300°C maksimam fɔ avɔyd pefɔmɛns fayl ɛn pɔtɛnɛshɛl sefty risk dɛn we kin kam bikɔs ɔf dilaminɛshɔn ɛn tɛmal dikɔmpɔzishɔn.
Wi de sɔpɔt pɔshɔnalizm ɛn intɛgriti as wi kɔr biznɛs filɔsofi, we de kɔmit fɔ gi wan-stɔp industrial sɔlvishɔn ɛn tink gud wan kɔstɔma-oriɛnted savis!
