PTFE ƒe nutsyɔnu si mesɔ o hea fliwo, pinholes, yellowing, alo non-stick dɔwɔwɔ si mewɔ ɖeka o vɛ. Le dɔwɔwɔwo abe dzoxɔxɔ ƒe nutrenu ƒe alidziblanu, ʋuɖoɖo ƒe alidziblanu, kple asiɖeɖe le nu ŋu ƒe alidziblanu ene gome la, nutsyɔtsyɔ ƒe ɖekawɔwɔ kpɔa ŋusẽ ɖe nusiwo wowɔ ƒe nyonyome kple woƒe dɔwɔwɔ ƒe agbenɔƒe dzi tẽ.
Nukae hea nutsyɔnu si mesɔ o vɛ? Ŋuɖoɖoa keke ta le nu ene me: nutsyɔtsyɔ ƒe wɔwɔme, nutsyɔtsyɔ & sintering ɖoɖo, substrate ƒe nyonyome, kple nuwɔwɔ ƒe nɔnɔme.
Aokai PTFE na nu siawo nyo wu le ewɔwɔ ƒe duƒuƒu akpe geɖe me. Nyati sia ɖe nu ɖesiaɖe kple alesi woaɖu wo dzi hena woƒe nyonyome deŋgɔ, ɖekawɔwɔ me Avɔ si wotsɔ PTFE ƒoe.
Coating Formulation – Nusi gbɔ wòtso be ɖekawɔwɔ tsona
Atikewɔwɔ ƒe Parameter
Ideal Range / Nudidi
Nusita Wòle Vevie
PTFE ƒe akpa suewo ƒe lolome
0.15 – 0.35 μm (D50) ƒe didime.
Mama si keke akpa gblẽa nu le substrate ƒe gege ɖe eme kple film-wɔwɔ ƒe dɔwɔwɔ ŋu
Molekyul ƒe kpekpeme & viscosity
Dadasɔ – menye kɔkɔ akpa alo bɔbɔ akpa o
Slurry ƒe ʋeʋẽ si mesɔ o xea mɔ na eƒe kaka gɔ̃ hã tẽ
Nusiwo le eme sesẽ
60±2% (si bɔ ɖe fufɔfɔ me) .
Nu sesẽ siwo sɔ gbɔ akpa nana be woƒe kpekpeme dzi ɖena kpɔtɔna sɔsɔe le wo ƒuƒu me
Kakaɖedzi ƒe ŋutete
Aglomeration aɖeke meli o
Kaka si mebɔ o hea nusuewo ƒe ƒuƒoƒo siwo le teƒea kple nusiwo wotsɔ blae ƒe gbagbã vɛ
Nusiwo le filler me (le kpɔɖeŋu me, ceramic powder) .
Nusiwo mewɔa tɔtrɔ o, wokaka nyuie
Trɔa nusuekpɔmɔ̃ ƒe anyigba ƒe nɔnɔme; filler si mewɔ ɖeka o hea titrime ƒe tɔtrɔ vɛ
Aɖaŋuɖoɖo nyui: Do PTFE emulsion ƒe hatsotso ɖesiaɖe kpɔ ɣesiaɣi hena nusuewo ƒe lolome mama kple eƒe ʋeʋẽ hafi woawɔe. 10% ƒe tɔtrɔ le viscosity me ateŋu atrɔ coating pickup to 5-8%.
Zi geɖe la, wobua ƒomedodo si le PTFE ƒe akpa suewo ƒe lolome kple nusi wotsɔ blaa nu ƒe ɖekawɔwɔ dome nu tsɛe. Emulsions siwo ƒe D50 le 0.12 μm te la sina bɔbɔe akpa, si wɔnɛ be edge bead (nu si le kpekpem wu le goawo dzi) nɔa ƒuƒu me. Emulsions siwo ƒe D50 wu 0.4 μm megena ɖe fiberglass me nyuie o, si wɔnɛ be eƒe gowo ƒe ʋeʋẽ lilili kple fiber encapsulation gbɔdzɔ. Afisi sɔ nyuie (0.18-0.22 μm) naa gege ɖe eme nyuie kple film ƒe wɔwɔme si le gbadzaa siaa. Nu vevi bubu enye surfactant ƒe agbɔsɔsɔ – surfactant ƒe agbɔsɔsɔ fũ nana foaming le dip coating me, si wɔnɛ be ya ƒe kuɖɔ siwo gbãna eye wogblẽa dowo ɖi. Surfactant sue akpa hea nusuewo ƒe ƒuƒoƒo kple ‘tɔmelã ŋkuwo’ vɛ le nusi wotsɔ blae mamlɛtɔ me. Be woawɔ ɖeka ɣesiaɣi la, wɔ dɔ kple emulsion dɔwɔƒe ɖeka eye nàbia batch ɖaseɖigbalẽ siwo ɖe D50, D90, kple surfactant ƒe alafa memamã fia.
Aokai PTFE zãa PTFE emulsion si dzi wokpɔa nusuewo ƒe lolome mama dzi vevie (D50 0.18-0.22 μm, D90 <0.35 μm) ko. Esia wɔnɛ be avɔ ƒe hatsotso ɖesiaɖe gena ɖe eme ɣesiaɣi eye wòwua eƒe akpa si le gbadzaa.
Coating & Sintering Process – Nyametsotso Afɔɖeɖe na Ðekawɔwɔ
1. Nutsyɔtsyɔ Mɔnu si Wotsɔ Sɔ Kple Wo Nɔewo
Nuwɔmɔnu
Gɔmeɖose
Ðekawɔwɔ ƒe Dzidzenu
Viɖewo
Nusiwo gblẽ le eŋu
Dip ƒe nutsyɔnu
Substrate toa emulsion tsilele me
Le ve dome
Tsidzadza blibo nyui, fiber encapsulation
Fli siwo didi wu, woƒe goawo le ɣie wu, titina le tsɛ wu
Blade ƒe nutsyɔnu
Precision ɖɔkta blade mitawo ƒe nutsyɔtsyɔ
Wolɔ̃a – ɖekawɔwɔ si kɔkɔ wu
Nusi wotsɔ blae si le gbadzaa, si le ʋeʋẽm, pinholes/streaks mele eme o
Sensitive na substrate ƒe gbadzaƒe
Spray ƒe nutsyɔnu
Atomized atike si wotsɔna ƒua gbe
Da ahe
Enyo na nɔnɔme siwo mesɔ o
Parameter-sensitive (adzɔge, nyaƒoɖeamenu), mesɔ na mass ewɔwɔ o
Ne womeƒu sɔsɔe o (kabakaba akpa alo blewu akpa) nana film la ƒe titrime si mewɔ ɖeka o, eƒe gbagbã, alo eƒe ʋuʋu ƒe dzesiwo nɔa anyi
Sintering ƒe dzoxɔxɔ
Ele be PTFE nalɔ̃ azu film si me womeɖea asi le o le dzoxɔxɔ 360-420°C . Dzoxɔxɔ si mesɔ o hea dzoxɔxɔ si mewɔ ɖeka o kple eƒe sɔsɔme vɛ
Sintering ƒe ɣeyiɣi didime
Ɣeyiɣi si mesɔ gbɔ o → film ƒe wɔwɔme si mede blibo o; ɣeyiɣi si gbɔ eme → ɣie alo dzoxɔxɔ ƒe gbegblẽ
Dzoxɔxɔ ƒe ɖekawɔwɔ le dzodoƒea katã
Teƒe dzodzoe/fafɛ siwo le nutoa me naa amadede ƒe tɔtrɔ (le kpɔɖeŋu me, ɣie le teƒe aɖewo) .
Dip + blade ƒo ƒu ƒe ɖoɖoa nye dɔwɔƒea ƒe dzidzenu na avɔ siwo ƒe dzoxɔxɔ deŋgɔ PTFE. Nusitae nye esi: dip coating ɖeɖeko naa ‘meniscus effect’ – coating la le kpekpem wu le goawo dzi eye wòle tsɛ wu le titina le emulsion la ƒe anyigba ƒe tete ta ne avɔa do le tsileƒea. Vovototo sia tso nugbɔ yi titina ateŋu anye 15-20% le eƒe titrime bliboa me. Blade coating ɖeɖe dzaa, togbɔ be ewɔa anyigba gbadza hã la, ewɔa avu kple gege ɖe eme – PTFE nɔa anyigba dzi evɔ metsɔa fiberglass kaawo ƒoa xlãe bliboe o, si wɔnɛ be womete ŋu nɔa te ɖe abrasion nu nyuie o. Dɔwɔwɔ si woƒo ƒu: nyrɔe be wòage ɖe eme, emegbe nàto ɖɔkta ƒe akplɔ te enumake be nàɖe nusiwo sɔ gbɔ la ɖa eye nàna anyigba la nasɔ. Be woakpɔ emetsonu nyuitɔwo la, ele be woaɖo akplɔa ƒe dometsotso ɖe 120-150% le nusi wotsɔ blae ƒe titrime mamlɛtɔ si wodi me, si awɔ akɔnta le eƒe ɖeɖe le eƒe ƒuƒu me ŋu. Dzoxɔxɔ ƒe nɔnɔmetata le sintering oven la dzi hã le vevie ŋutɔ – 10°C ƒe ʋuʋu le kekeme dzi ateŋu ahe fli siwo woateŋu akpɔ.
Substrate Quality & Do ŋgɔ na atikewɔwɔ – Gɔmeɖoanyi na Ðekawɔwɔ
Memanu
Ŋusẽkpɔɖeamedzi ɖe Coating Uniformity dzi
Weave ƒe kpɔɖeŋu
Plain weave: tight texture, didime ƒe liƒo nyui, permeability madeamedzi. Satin weave: wɔwɔme si me mekɔ o, gege ɖe eme si de ŋgɔ wu, eƒe adhesion si kɔ wu. Twill: domedometɔ. Weave density ƒe vovototowo kpɔa ŋusẽ ɖe emulsion ƒe gege ɖe eme dzi tẽ.
Nusiwo ƒo ɖi le anyigba dzi
Paraffin si susɔ, ami siwo dona tso nutata/lɔlɔ̃ me xea mɔ na PTFE gɔ̃ hã ƒe kaka vevie eye wòhea nutsyɔnu ƒe gbagbã vɛ
Anyigba ƒe ƒuƒuiƒe
Gbeɖiɖi si mewɔ ɖeka o nana nutsyɔnu ƒoa ƒu le mɔ si mesɔ o nu (wòlolona le teƒe siwo ƒu kplakplakpla, wòlolona le teƒe siwo le gbadzaa) .
Kafukafu: Le dɔwɔwɔ siwo sɔ ŋutɔ (le kpɔɖeŋu me, dzoxɔxɔ nutrenu ƒe kasɛtwo) gome la, zã satin weave fiberglass avɔ si ŋu dzoxɔxɔ kɔklɔ be nàɖe lãmenugbagbevi siwo katã susɔ hafi nàtsɔ PTFE atsyɔ wo dzi.
Nuwɔwɔ ƒe Nɔnɔme – Kakaɖedzi na Ðekawɔwɔ Kɔkɔ
Nutome Ŋuti Nunya
Nɔnɔme Nyuitɔ Kekeake
Nu ka ta
Dzoxɔxɔ
20-25°C ƒe dzoxɔxɔ
Dzoxɔxɔ si medze o gbɔdzɔa nutsyɔnu ƒe dzidzenu ƒe dɔwɔwɔ
Fafa si sɔ gbɔ wu
<60% (enyo wu: 40-55%)
Fafa geɖe nana tsi ƒoa ƒu ɖe emulsion me, si wɔnɛ be pinholes dona
Yame ƒe dzadzɛnyenye
Ke mele eme o (wokafui be woatsɔ HEPA akɔ tsii) .
Ke si tso ya me gena ɖe nusi wotsɔ blae me, si wɔnɛ be eƒe gowo ƒe nɔnɔme gblẽna
Ya ƒe sisi
Woɖua wo dzi, womexɔa asrafo tẽ o
Ya si mesɔ o nana be avɔa ƒuna edziedzi le avɔa ƒe kekeme katã me
Nya nyui aɖe: Le tsidzaɣi alo ŋkeke siwo dzi yame fa miamiamia ŋutɔ la, bu eŋu be yeatsɔ tsi si ɖea tsi le lãme na ame le xɔ si me wofa nu ɖo me. Fafa si wu 70% dzia pinhole ƒe gbagbãƒewo ɖe edzi ŋutɔ.
Kpuie ko la – Wo Katã Ðekae
Memanu
Dzɔdzɔmeŋusẽŋununya Vevitɔ Kekeake
Asixɔxɔ/Agbɔsɔsɔme Nyuitɔ
Atikewɔwɔ
Nusuewo ƒe lolome mama
D50 0.18-0.22 μm, D90 <0.35 μm
Atikewɔwɔ
Nusiwo le eme sesẽ
60±2% ƒe xexlẽme.
Nuwᴐna
Mɔnu si wotsɔ tsyɔa nu nu dzi
Dip + blade ƒo ƒu
Nuwᴐna
Sintering dzoxɔxɔ ƒe ɖekawɔwɔ
±5°C le dzodoƒea ƒe kekeme katã me
Nusi wotsɔ wɔa anyigbae
Weave ƒe kpɔɖeŋu
Satin weave na dɔwɔɖoɖo siwo le vevie na ɖekawɔwɔ
Nusi wotsɔ wɔa anyigbae
Do ŋgɔ na atikewɔwɔ
Wotsɔ dzoxɔxɔ klɔe, si me nusiwo susɔ mele o
Xexeãme
Dzoxɔxɔ & fafa
20-25°C, RH <60% .
In summary , coating uniformity of PTFE high-teature fabric nɔ te ɖe nu ene siwo do ƒome kple wo nɔewo dzi. Nusi wotsɔ blaa nu (nusuewo ƒe lolome, woƒe ʋeʋẽ, nu sesẽ siwo le eme) ye nye nusi gbɔ wòtso. Nutsyɔtsyɔ kple sintering ƒe ɖoɖoa – vevietɔ dip + blade zazã ƒo ƒu – ye nye afɔɖeɖe vevitɔ. Substrate ƒe nyonyome kple atikewɔwɔ do ŋgɔ na gɔmeɖoanyia. Nuwɔwɔ ƒe nɔnɔme naa kakaɖedzi be woawɔ nu ɖekae.
Le dɔwɔwɔ sesẽ siwo hiã ɖekawɔwɔ gã (le kpɔɖeŋu me, dzoxɔxɔ nutrenu tapes, asiɖeɖe le liners na nusiwo léna ɖe nu ŋu), dip + blade ƒokpli ƒe ɖoɖoa nye dɔwɔƒea ƒe sika dzidzenu. Lé ŋku ɖe parameter ɖesiaɖe ŋu edziedzi, na nutome ƒe nɔnɔmewo nali ke, eye nàdo emulsions siwo va la kpɔ hena nusuewo ƒe lolome mama.
Èhiã kpekpeɖeŋu be nàɖo nutsyɔnu ƒe ɖekawɔwɔ si mewɔa tɔtrɔ o gbɔ na wò PTFE avɔa? Aokai PTFE naa custom coating subɔsubɔdɔwo kple dɔwɔwɔ ŋuti aɖaŋuɖoɖo. Te ɖe mía ŋu kple wò taɖodzinu ƒe nɔnɔmewo kple ewɔwɔ ƒe agbɔsɔsɔme.
Esi míelé subɔsubɔ ƒe gɔmeɖose si nye dɔwɔwɔ nyuie kple fɔmaɖimaɖi me ɖe asi ta la, míetsɔ mía ɖokui na be míana egbɔkpɔnuwo le teƒe ɖeka kple subɔsubɔdɔ siwo ŋu wobua tame na asisiwo katã.
