Sintering na di krichכl step usay PTFE patikyula dεm de mεlt, fכ fכlכ, εn fכs insay wan kכntinyu, dense film we de bכnd to di fayv glas sabstεrayt. If di tɛm we dɛn de ol am tu shɔt, di kɔtin de kɔntinyu fɔ gɛt porous ɛn wik. If i tu lɔng, di PTFE de pwɛl, i de pul pɔyzin gas dɛn ɛn tɔn brital.
di ki paramita na di tεm we yu de ol – di tεm we i de tek afta di kכt bכlk rich di sintering tεmprachכ (tipikli 370-400°C). Dis nɔto jɔs di tɛm we di ɔfna de na di tɛmpracha; na di tɛm we di di klos insɛf de ɔp di say we i de mɛlt.
Aokai PTFE dɔn ɔptimayz sintering paramita dɛn akɔdin to bɔku prɔdak layn dɛn. Dis gayd de kɔba di tɛm we dɛn nid fɔ ol fɔ difrɛn kayn ɔfna dɛn, di tin dɛn we de afɛkt di kɔr, ɛn di tin dɛn we nɔ fayn frɔm di tɛm we dɛn nɔ de yuz di rayt tɛm.
Besik Prinsipul dɛm – Wetin 'Holding Time' Rili Min
1. Di men tin we yu want fɔ du
fכ alaw PTFE patikyula dεm fכ fulכp mεlt, fכ fכlכ, εn fכs oba dεn mεlt pכynt (aprכx. 327°C ), fכ fכm wan kכntinyu εn dense film we de achy tayt mεkanikal intalכk wit di fayv glas sabstεrayt.
2. Krio difrɛns
di tεm we dεn de ol de tכk bכt di tεm we di fכs de tek afta di kכt bכlk rich di sinta tεmprachכ (nכmal 370-400°C), pas fכ jכs di tεm we di fכna tεmprachכ de kכnstant.
I impɔtant fɔ mek shɔ se di ful tik we di fayv glas klos (inklud di rɛsin we dɔn trɔp bitwin di fayv bɔndɛl dɛn we de insay) rich di tɛmpracha we de mɛlt ɛn i go ol fɔ inof tɛm. di tεmprechכr na di sכfayz nכmכ nכ inof – di insay layεr dεm dεn mכst mεlt bak.
Rifrɛns Rɛnj fɔ Tipik Prɔses
1. Kɔntinyu fɔ sinta ɔfna
Fɔrna tɛmpracha sɛtup: Mɔlti-zon ɔt wit di ay-tɛmpracha zon we dɛn sɛt to 380-400°C (we go rich 410°C fɔ sɔm kɔstɔmayz fɔmyulashɔn dɛn).
Ifektiv rεsidεns tεm (holdin tεm) in hεy-tεmpratura zon:
Mɛmba: Bɔks ɔfna dɛn kin sɔfa we dɛn nɔ de sheb di tɛmpracha we nɔ ivin. di ay-vεlositi sirkulεt εya nid fכ, εn di tεm we i de ol fכ εksεnd di rayt we fכ avכyd כnda-sintering fכ di insay layεr dεm.
Di Kɔr Fakta dɛn we De Ditarmin di Tɛm fɔ Hol
Fayv ki fכktכr dεm de intarakt fכ no di optimal holdin tεm fכ eni spεsifi k prodak.
1. Fayba glas fabrik tik ɛn wet
Tik, ebi klos dɛn gɛt po tɛmral kɔnduktiviti ɛn dɛn nid fɔ ol lɔng tɛm fɔ mek di ɔt go insay di sɛnt.
2. Kotin pas ɛn PTFE lod
mכltipכl kכt layεr dεm de mek tik tik rεsin film dεm we nid fכ εkstend כt fכ fulכp mεlt di bכtכm kכt. Singl tin kɔtin dɛn kin alaw fɔ ol shɔt tɛm.
3. PTFE emulshɔn gred
Pure PTFE emulsions – nid fɔ gɛt ay sintering tɛmpracha ɛn inof tɛm fɔ de
Modified blends (miks wit PFA ɔ FEP) – de sho supia mɛlt flɔ ɛn alaw fɔ ridyus di tɛm we dɛn de ol
4. Tεmprachכ we dεn de sinter
hכy set tεmprachכ dεm (εgz., 400°C) – sכt di tεm we dεn nid fכ hכl
Tεmpratura nia di lכw limit (370°C) – nid fכ hεt fכ lכng tεm
Di 380-390°C winda balans prodakshɔn efyushɔn ɛn PTFE dɛgradɛshɔn risk
5. Fɔrna dizayn ɛn ɔt ɛya velositi
Fɔrna dɛn we gɛt ay-spid ɔt ɛya sirkuleshɔn ɔ infrarɛd penetreshɔn – efyushɔn ɔt transfɔm, shɔt tɛm fɔ ol
Fɔrna dɛn we de abop pan raytin ɔt nɔmɔ – dɛn nid fɔ de fɔ lɔng tɛm
Difɛkt dɛn we Kɔz bikɔs di tɛm we dɛn nɔ de ol am fayn
1. Nɔ inɔf tɛm fɔ ol (ɔnda-sinter) .
Di sayn we de sho se di sik de
Rut Kɔz
Kotin de tɔn opaque wayt, gren, rɔf sɔfays
Partikul dεm we nכ fulכp mεlt εn fכs
Pɔr adheshon – we yu de pul afta yu dɔn rɔb ɔ fold
Wik bonding to fayv glas
Ridyus dielektrik trɛnk, ay ay permiabiliti
Porous, inkɔmplit film strɔkchɔ
Digrɛd wata/ɔyl ripɛlɛns
Surface nɔ ful-ɔp fɔ dense
Substandard mɛkanikal trɛnk
Wik inta-partikul bonding
Ditekshɔn: Visual inspekshɔn (opak wayt, greyn), tep pul tɛst (peeling), krɔs-sɛkshɔn inspekshɔn (wayt patikyula dɛn we nɔ mɛlt insay).
2. Fɔ lɔng tɛm fɔ ol pasmak (ɔva-sinter) .
Di sayn we de sho se di sik de
Rut Kɔz
PTFE de bigin fɔ mek di tɛmral dɛkɔmpɔzishɔn
Fɔ lɔng tɛm we yu de na 380-400°C (i rili bad pas 415°C) .
di kכt de tכn yכlכ, brit, brawn/blak sכch spat dεm
Tɛmral dɛgradɛshɔn
Tɔxik fluoride gas rilis (HF, PFIB) .
PTFE dikɔmpɔzishɔn
Fayba glas kin lɔs trɛnk fɔ tɛnsiɛl
Di damej we di ɔksidɛshɔn de mek we di ples gɛt ay tɛmpracha
Pinhol ɛn bɔbul dɛn na di kɔtin sɔfays
Gas evolushɔn frɔm digradɛshɔn
Ditekshɔn: Visual inspekshɔn (yɔlɔ, skɔch spat), britlɛs tɛst (krak we i bɛn), smel ditekshɔn (akrid smɛl de sho se dikɔmpɔzishɔn).
Yuz wan ɔfna tɛmpracha traka fɔ rikodɔ rial-taym fabrik sɔfayz tɛmpracha ɛn chɛk if i fayn fɔ mek i mɛlt pas 370°C. Dis na di we we pɔsin kin abop pan pas ɔl fɔ kɔnfɔm rial tɛm fɔ ol.
2. Visual machɔri inspekshɔn
Ful sintered PTFE kotins prɛzɛnt:
Yunifɔm sɛmi-transparent to ful transparent apinɛns (i kin difrɛn wit tik)
No chalky unmelted patikyula dɛn
Fleksibul fɔ tɔch (nɔto stiff ɔ brittle) .
3. Tɛst fɔ adheshon
Nɔ peel ɔ pauda rɛsɛdyu afta tep pul tɛst ɔ ripit bɛnd (fold/unfold 5-10 tɛm).
Wantɛm wantɛm yu fɔ fid di klos insay wan fɔs kol zon afta di ay-tɛmpracha sɛkshɔn fɔ kol dɔŋ dɔŋ 300°C kwik kwik wan – kwik kol de ɛp fɔ lɔk insay di fuz maykrostrakchɔ
Sɔma – Kwik Rifrɛns Holdin Taym Gayd
Tayp fɔ Fɔrna
Tiknɛs fɔ Fabrik
Di Tɛm we Dɛn Rikɔmɛnd fɔ Hol
Kɔntinyu (mɔlti-zon) .
Tin (0,08-0,15 mm) fɔ mek i tan.
30 – 90 sɛkɔn
Kɔntinyu (mɔlti-zon) .
Midul (0,15-0,30 mm) .
90 – 180 sɛkɔn
Kɔntinyu (mɔlti-zon) .
I ebi (>0.30 mm) .
3 – 5+ minit fɔ lɔng tɛm
Batch (bɔks-tayp) .
Single kot we yu de yuz
5 – 15 minit fɔ lɔng tɛm
Batch (bɔks-tayp) .
Multi-kot / we gɛt laminɛt
15 – 30 minit fɔ lɔng tɛm
Jɛnɛral rul: Adopt di minim akseptabl holdin tɛm we de mek shɔ se kɔmplit kɔtin mɛlt, lɛvɛl, ɛn ziro ɔnda kɔr dɛn we nɔ mɛlt – fɔ mitigate thermal degradation risk.
Aokai PTFE de gi sintering prɔses sɔpɔt inklud tɛmpracha trakin, krɔs-sɛkshɔn inspekshɔn, ɛn paramita ɔptimayzeshɔn. Kɔntakt wi fɔ ɛp wi fɔ gɛt tɛknikal.
