Cov txheej txheem PTFE tsis sib xws ua rau muaj streaks, pinholes, yellowing, lossis kev ua haujlwm tsis sib xws. Rau cov ntawv thov xws li cov hlua khi hlua khi, cov hlua khi, thiab cov hlua tso tawm, txheej txheej ncaj qha cuam tshuam rau cov khoom zoo thiab kev pabcuam lub neej.
Dab tsi ua rau cov txheej txheem tsis sib xws? Cov lus teb nthuav dav plaub qhov chaw: txheej txheej, txheej txheej & sintering, substrate zoo, thiab ib puag ncig tsim khoom.
Aokai PTFE tau ua kom zoo dua cov xwm txheej no thoob plaws ntau txhiab tus khiav haujlwm. Kab lus no piav qhia txhua yam thiab yuav ua li cas tswj lawv kom zoo, zoo ib yam PTFE-coated ntaub
Formulation Parameter
Qhov Zoo Tshaj Plaws / Xav Tau
Vim Li Cas Nws Tseem Ceeb
PTFE particle loj
0.15 - 0.35 μm (D50)
Overly broad distribution impairs substrate penetration thiab film-forming performance
Molecular hnyav & viscosity
Sib npaug - tsis siab dhau lossis qis dhau
Qhov txawv txav slurry viscosity ncaj qha tiv thaiv txawm tias kis tau
Cov ntsiab lus ruaj khov
60 ± 2% (raug impregnation)
Cov khib nyiab ntau dhau ua rau tsis sib xws thaum ziab
Dispersibility
Tsis muaj agglomeration
Tsis zoo dispersibility ua rau lub zos particle pawg thiab txheej tsis xws luag
Muab cov ntsiab lus (piv txwv li, ceramic hmoov)
Zoo sib xws, zoo dispersed
Hloov cov kab mob microscopic nto; inconsistent muab tub lim ua rau thickness variation
Tswv yim tswv yim: Ib txwm sim txhua batch ntawm PTFE emulsion rau particle loj tis thiab viscosity ua ntej ntau lawm. 10% kev hloov pauv hauv viscosity tuaj yeem hloov cov txheej txheem los ntawm 5-8%.
Cov kev sib raug zoo ntawm PTFE particle loj thiab txheej uniformity yog feem ntau underestimated. Emulsions nrog D50 qis dua 0.12 μm ntws yooj yim heev, ua rau cov hlaws hlaws tsim (thicker txheej ntawm npoo) thaum ziab. Emulsions nrog D50 saum toj no 0.4 μm nkag mus rau fiberglass tsis zoo, ua rau saum npoo porosity thiab tsis muaj fiber ntau encapsulation. Qhov zoo tshaj plaws ntau yam (0.18-0.22 μm) muab ob qho tib si nkag mus zoo thiab tsim cov yeeb yaj kiab du. Lwm qhov tseem ceeb tshaj plaws yog cov ntsiab lus surfactant - ntau dhau ntawm cov surfactant ua rau foaming thaum lub sij hawm dip txheej, tsim cov pa npuas uas tawg thiab tawm hauv qhov craters. Tsawg heev surfactant ua rau particle agglomeration thiab 'ntses ob lub qhov muag' nyob rau hauv lub kawg txheej. Rau qhov sib xws, ua haujlwm nrog ib tus neeg muab khoom emulsion thiab thov daim ntawv pov thawj batch uas qhia D50, D90, thiab feem pua surfactant.
Aokai PTFE tsuas yog siv PTFE emulsion nrog nruj tswj particle loj tis (D50 0.18-0.22 μm, D90 <0.35 μm). Qhov no ua kom muaj kev nkag mus zoo ib yam thiab du nto tiav thoob plaws txhua pawg ntawm cov ntaub.
1. Txheej txheej sib piv
Txoj kev
Txoj Cai
Uniformity Level
Pros
Cons
Dip txheej
Substrate dhau los ntawm emulsion da dej
Nruab nrab
Zoo tag nrho ntub dej, fiber ntau encapsulation
Longitudinal streaks, thicker npoo, thinner center
Hniav txheej
Precision kws kho hniav hniav meter txheej
Nyiam - siab tshaj uniformity
Smooth, ntom txheej, tsis muaj pinholes / streaks
Sensitive rau substrate flatness
Txau txheej
Atomized tshuaj tsuag
pluag
Zoo rau cov duab tsis xwm yeem
Parameter-sensitive (nyob deb, siab), tsis haum rau ntau lawm
Kev coj ua zoo tshaj plaws hauv kev lag luam: kev sib xyaw ua ke - dip txheej + hniav txheej - dav siv. Qhov no ua ke zoo tshaj tag nrho cov ntub dej ntawm dip txheej nrog zoo heev nto flatness ntawm cov hniav txheej, ntsuas fiber ntau encapsulation zog thiab nto precision.
2. Tshuab ziab khaub ncaws & Sintering
Parameter
Qhov cuam tshuam rau Uniformity
Qhuav tus nqi
Kev ziab tsis sib xws (ceev dhau los yog qeeb dhau) ua rau cov yeeb yaj kiab tsis sib xws, tawg, lossis cov cim shrinkage
Sintering kub
PTFE yuav tsum yaj rau hauv zaj duab xis tas li ntawm 360-420 ° C. Qhov kub tsis sib xws ua rau qhov tsis sib xws ntawm melting thiab leveling
Sintering duration
Lub sij hawm tsis txaus → kev tsim zaj duab xis tsis tiav; Lub sij hawm ntau dhau → yellowing lossis thermal degradation
Kub uniformity thoob qhov cub
Cov chaw kub / txias hauv zos ua rau muaj xim sib txawv (xws li, daj hauv qee qhov chaw)
Lub dip + hniav ua ke txheej txheem yog cov txheej txheem kev lag luam rau high-end PTFE high-temperature fabrics. Ntawm no yog vim li cas: dip txheej ib leeg ua rau 'meniscus effect' - cov txheej yog thicker ntawm cov npoo thiab nyias nyob rau hauv qhov chaw vim qhov nro ntawm cov emulsion thaum cov ntaub tawm hauv da dej. Qhov kev hloov ntawm ntug-rau-nruab nrab no tuaj yeem yog 15-20% ntawm tag nrho cov tuab. Hniav txheej ib leeg, thaum tsim ib qho chaw tiaj tus, tawm tsam nrog kev nkag mus - PTFE nyob twj ywm ntawm qhov chaw yam tsis muaj kev cuam tshuam tag nrho cov fiberglass fibers, ua rau tsis zoo puas. Cov txheej txheem ua ke: poob rau kev nkag mus, tom qab ntawd tam sim ntawd dhau los ntawm tus kws kho mob hniav kom tshem tawm ntau dhau thiab theem saum npoo. Rau cov txiaj ntsig zoo, qhov sib txawv ntawm cov hniav yuav tsum tau teem rau 120-150% ntawm qhov kawg xav tau txheej txheej, suav rau shrinkage thaum ziab. Kub profileing thoob plaws qhov cub sintering kuj tseem ceeb heev - 10 ° C gradient thoob plaws qhov dav tuaj yeem ua rau pom streaks.
Qhov xwm txheej
Kev cuam tshuam rau Txheej Txheej Uniformity
Weave qauv
Plain weave: nruj kev ntxhib los mos, zoo dimension stability, tsis zoo permeability. Satin weave: xoob qauv, superior nkag mus, siab dua adhesion. Twill: nruab nrab. Weave qhov sib txawv ntawm qhov sib txawv ncaj qha cuam tshuam rau emulsion nkag mus.
Cov kab mob ntog
residual paraffin, lubricants los ntawm kev kos duab / weaving heev cuam tshuam txawm PTFE kis thiab ua rau txheej tsis xws luag
Nto roughness
Inconsistent roughness ua rau txawv txav txheej tsub zuj zuj (tuab nyob rau hauv qhov chaw ntxhib, nyias hauv qhov chaw du)
Cov lus pom zoo: Rau cov ntawv siv siab sib xws (xws li, cov ntaub nplaum thaum tshav kub kub sealing), siv satin weave fiberglass ntaub nrog kub ntxuav kom tshem tawm tag nrho cov organic residues ua ntej PTFE txheej.
Environmental Factor
Qhov zoo tshaj plaws
Vim li cas
Kub
20-25 ° C
Tsis tsim nyog kub tsis muaj zog txheej txheej leveling kev ua tau zoo
txheeb ze humidity
<60% (zoo tagnrho: 40-55%)
High humidity ua rau dej condensation nyob rau hauv emulsion, ua rau pinholes
Huab cua huv
Tsis muaj plua plav (HEPA pom zoo)
Cov plua plav hauv huab cua embeds nyob rau hauv txheej, tsim defects
Cua ntws
Tswj tau, tsis muaj cov ntawv sau ncaj qha
Cov huab cua tsis sib xws ua rau qhov tsis sib xws ntawm qhov ziab ntawm cov ntaub dav
Nco ntsoov: Thaum lub caij los nag lossis hnub muaj av noo, xav txog kev khiav lub tshuab dehumidifier hauv chav txheej txheej. Cov av noo siab dua 70% ua rau muaj qhov tsis xws luag ntawm pinhole.
Summary - Muab Tag Ib Sim
Qhov xwm txheej
Feem ntau Qhov Tseem Ceeb Tswj
Qhov zoo tshaj tus nqi/Range
Kev tsim qauv
Particle loj faib
D50 0.18-0.22 μm, D90 <0.35 μm
Kev tsim qauv
Cov ntsiab lus ruaj khov
60 ± 2%
Txheej txheem
Txheej txheej
Dip + hniav sib xyaw
Txheej txheem
Sintering kub uniformity
± 5 ° C nyob ntawm qhov dav dav
Substrate
Weave qauv
Satin weave rau uniformity-tseem ceeb apps
Substrate
Kev kho mob ua ntej
Thaum tshav kub kub ntxuav, tsis muaj residue
Ib puag ncig
Kub & humidity
20-25 ° C, RH 60%
Hauv cov ntsiab lus , txheej txheej uniformity ntawm PTFE high-temperature npuag nyob ntawm plaub yam kev sib tshuam. Txheej txheej formulation (particle loj, viscosity, khoom cov ntsiab lus) yog lub hauv paus. Txheej txheej thiab sintering - tshwj xeeb tshaj yog siv dip + hniav ua ke - yog qhov txiav txim siab theem. Substrate zoo thiab pre-kev kho mob muab lub hauv paus. Kev tsim khoom ib puag ncig lav qhov sib xws.
Rau kev thov cov ntawv thov uas yuav tsum muaj kev sib txig sib luag (xws li, cov ntaub qhwv cov ntaub ntawv kub, tso cov ntaub nplaum rau cov khoom nplaum), cov txheej txheem dip + hniav ua ke yog kev lag luam kub txheej txheem. Saib xyuas txhua qhov ntsuas tsis tu ncua, ua kom ib puag ncig ruaj khov, thiab sim cov khoom emulsions tuaj rau qhov loj me me.
Xav tau kev pab kom ua tiav cov txheej txheej zoo ib yam rau koj cov ntaub PTFE? Aokai PTFE muab kev pabcuam txheej txheej thiab kev sib tham txog txheej txheem. Tiv tauj peb nrog koj lub hom phiaj specifications thiab ntau lawm ntim.
Cov ntsiab lus saum toj no yog muab los ntawm Jiangsu Aokai Tshiab Materials Technology Co., Ltd.
Yog tias koj xav paub ntau ntxiv txog cov ncauj lus kom ntxaws, daim ntawv thov scenarios, thiab cov kev daws teeb meem rau peb cov khoom lag luam, suav nrog PTFE high-temperature fabrics, PTFE high-temperature tapes, PTFE high-temperature mesh bets, seamless fusing machine bets, single-sided PTFE fabrics, high-temperature fabrics resistant, high-temperature resistant, fiberglass resistant, high-temperature fabrics resistant fiber ntau. tiv tauj peb:
Ua raws li cov kev pabcuam kev ua haujlwm ntawm kev tshaj lij thiab kev ncaj ncees, peb tau mob siab rau muab cov kev daws teeb meem ib zaug thiab saib xyuas kev pabcuam rau txhua tus neeg siv khoom.
