PTFE emulsion impregnation yog cov txheej txheem tseem ceeb rau kev tsim khoom PTFE high-temperature ntaub
Aokai PTFE tau optimized impregnation formulations thoob plaws ntau yam khoom. Phau ntawv qhia no piav qhia txog yim lub koom haum feem ntau - lawv ua dab tsi, lawv ua haujlwm li cas, thiab thaum twg siv lawv.
Wetting thiab Penetrating Agents - Qhov tseem ceeb Additive
Raw PTFE emulsion has relatively high surface tension, which leads to poor infiltration into fibers and fabrics. Cov tshuaj ntub dej txo qhov nro, tso cai rau cov emulsion kis tau thiab nkag mus tau zoo.
Hom
Piv txwv
Nta
Nonionic surfactants (nruab nrab)
Fatty alcohol polyoxyethylene ethers (AEO series), alkyl polyglycosides (APG)
Stable, dav sib xws
Fluorocarbon surfactants
Chemours Capstone series (cov saw luv, PFOS / PFOA-dawb)
Ultra-low nto nro, zoo heev nkag mus rau hauv tawv-rau-ntub substrates. Kev noj tshuaj yuav tsum nruj me ntsis tswj kom tsis txhob degrading nto kev ua tau zoo tom qab sintering.
Nco ntsoov: Fluorocarbon surfactants muaj txiaj ntsig zoo tab sis yuav tsum tau ceev faj. Tshaj tuaj yeem txav mus rau txheej txheej thaum sintering thiab txo qis kev ua haujlwm tsis zoo.
Thickeners thiab Rheology Modifiers - Tswj Txheej Pick-Up
Thickeners kho emulsion viscosity los tiv thaiv dripping thiab precisely tswj txheej thickness.
Hom
Piv txwv
Nta
Cellulose ethers
Hydroxyethyl cellulose (HEC), methyl cellulose (MC)
Dej-soluble, hlawv tag nrho thaum sintering
Alkali-swellable acrylic tuab (ASE)
ASE series
High efficiency, adjustable thixotropy (neutralized nrog ammonia dej)
Polyurethane associative thickeners (HEUR)
HEUR hom
Zoo heev leveling, anti-xeb
Inorganic thickeners
Fumed silica, bentonite
Txhim khu thixotropy thiab kub tsis kam; tej zaum yuav txo cov txheej clarity
Practical tip: For thin, uniform coatings on tight-weave fabric, use low-viscosity formulations with minimal thickener. Rau cov coatings hnyav los yog qhib-weave fabrics, nce thickener los tswj qhov tob tob.
pH Regulators thiab Emulsion Stabilizers
PTFE emulsions feem ntau stabilized los ntawm anionic surfactants thiab tswj ntawm pH 9-10 los tiv thaiv coagulation.
Ammonia dej (28 wt%): Cov khoom siv dav tshaj plaws. Nws volatilizes kiag li thaum ziab / sintering, tsis muaj residues uas cuam tshuam kev ua tau zoo.
Pab stabilizers: Anionic surfactants xws li sodium dodecyl sulfate (SDS) thiab theem nrab alkyl sulfonate (SAS) txhim kho shear tsis kam ntawm emulsion thaum lub sij hawm nqus thiab agitation.
Pure PTFE muaj qhov tsis muaj zog ntawm kev sib txuas nrog cov substrates. Adhesion txhawb nqa yog qhov tseem ceeb.
1. Silane coupling agents
Piv txwv li: Aminosilane (KH-550), epoxy silane.
Mechanism: Tom qab hydrolysis, lawv tsim tshuaj bonds nrog fiberglass - Si-O-Si bonds ntawm silane thiab iav, thiab organic functional pawg uas cuam tshuam nrog PTFE los yog lwm yam polymers.
Ceeb toom: Yuav tsum tau ua tib zoo ntxiv kom tsis txhob emulsion tawg. Pre-hydrolysis los yog tom qab kev kho mob (ua ntawv thov rau ntaub ua ntej impregnation) yog pom zoo.
2. High-temperature resistant bonding resin dispersions
Piv txwv li: Waterborne dispersions ntawm polyamide-imide (PAI), polyphenylene sulfide (PPS), polyethersulfone (PES).
Daim ntawv thov: Cov ntaub ntawv tseem ceeb rau cov txheej txheem tsis-stick thiab cov khoom sib txuas rau impregnated fiberglass lim xov xwm thiab cov ntaub ntawv membrane. Lawv txhim kho adhesion thiab cohesion hauv qhov kawg sib xyaw.
PTFE muaj cov viscosity siab heev. Film-forming pab pab txhawb particle fusion thaum sintering.
Cov fluoropolymers yaj no ua rau cov molten bonding theem ntawm PTFE hais thaum sintering, boosting txheej compactness thiab interfacial adhesion. Lawv muaj txiaj ntsig tshwj xeeb rau cov txheej txheej tuab lossis thaum xav tau qis sintering.
Functional Fillers - Custom Properties on Demand
Fillers tau ncaj qha mus rau hauv lub emulsion kom faib cov khoom tshwj xeeb.
Hom Filler
Piv txwv
Lub hom phiaj
Hnav-resistant fillers
Nano / micro alumina, silicon carbide, silica
Txhim kho kev puas tsuaj
Conductive / antistatic fillers
Carbon dub, graphite, carbon nanotubes (nrog dispersants)
Dissipate static nqi
Xim pigments
Hlau oxide dub, titanium dioxide
Xim coding, UV tsis kam
Ib qho tseem ceeb: Cov khoom ntim yuav tsum muaj cov khoom ntub dej kom tsim nyog (piv txwv li, polycarboxylates) txhawm rau tiv thaiv agglomeration thiab xyuas kom muaj kev sib faib.
Defoamers - Tiv thaiv Pinholes
Mob hnyav tshwm sim thaum lub sij hawm impregnation, ua rau pinhole defects ntawm coatings.
Hom
Nta
Silicone-free defoamers (nyiam dua)
Polyether-based, ntxhia roj-based. Tshem tawm txoj kev pheej hmoo ntawm silicone residue cuam tshuam nrog kev sib txuas los yog kev kho saum npoo.
Silicone defoamers
Muaj peev xwm defoaming muaj peev xwm, tab sis kev siv tsuas yog siv rau cov ntawv thov uas muaj cov kab mob silicone residue tau txais.
Kev pom zoo: Rau PTFE daim kab xev uas yuav siv rau hauv kev ua haujlwm siab los yog daim ntawv thov txheej, silicone-dawb defoamers yog qhov xav tau.
Cov kuab tshuaj kub kub kub los yog polyols (propylene glycol, ethylene glycol) yog qee zaus ntxiv rau cov dej evaporation qeeb thiab tiv thaiv kev tawg los ntawm kev ziab sai.
Tseem ceeb: Cov no tsis tshua muaj siv nyob rau hauv sintering txheej txheem, raws li tag nrho cov organic Cheebtsam yuav tsum tau tag nrho decompose thaum sintering. Kev siv ntau dhau tuaj yeem tso cov pa roj carbon residue.
Summary - Xaiv Cov Pab Pawg Pabcuam Zoo
Lub hom phiaj
Pom zoo pab
Txhim kho ntub dej thiab nkag mus
Nonionic los yog fluorocarbon wetting agent
Tswj txheej hnyav
Thickener (cellulose lossis HEUR)
Stabilize emulsion, tiv thaiv coagulation
pH regulator ( dej ammonia) + anionic stabilizer
Txhim kho PTFE-substrate daim ntawv cog lus
Silane coupling tus neeg saib xyuas lossis PAI / PPS resin dispersion
Txhim kho zaj duab xis tsim, qis sintering temp
PFA lossis FEP dispersion
Ntxiv hnav tsis kam
Alumina los yog silicon carbide muab tub lim
Ntxiv conductivity
Carbon dub, graphite, los yog CNT
Tiv thaiv pinholes los ntawm ua npuas ncauj
Silicone-dawb defoamer
Maj mam qhuav rau cov txheej tuab
Humectant (propylene glycol) - siv me ntsis
Aokai PTFE tuaj yeem tsim kev cai impregnation blends rau cov ntawv thov tshwj xeeb. Tiv tauj peb nrog koj cov substrate, txheej thickness yuav tsum tau, thiab cov hom phiaj kev ua tau zoo.
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 tag nrho, suav nrog PTFE high-temperature fabrics, PTFE high-temperature tapes, PTFE mesh bets, seamless bonding machine belts, single-sided PTFE fabrics, high-temperature resistant conveyor bets thiab high-temperature fabrics, thov hu rau peb:
Peb ib txwm txhawb nqa lub tswv yim ntawm kev tshaj lij thiab kev ncaj ncees, thiab tau cog lus los muab kev daws teeb meem rau koj ib leeg thiab kev xav zoo.
