PTFE emulsion impregnation i endlelo ra nkoka ro humelerisa PTFE lapi ra mahiselo ya le henhla . Ku hangalaka ka base PTFE ntsena a hi minkarhi hinkwayo ku tsakamaka, ku nghena, kumbe ku boha hi ku hetiseka eka lapi ra fiberglass. Leswaku ku fikeleriwa ku peta loku fanaka, ku namarhela loku tiyeke ni swilo leswi nga riki na swihoxo, vaendli va engetela nxaxamelo wa swipfuneti leswi tirhaka.
Switirhisiwa swo Tswakisa na ku Nghena – Xiengeteri xa Nkoka
Raw PTFE emulsion yina tension yale henhla swinene yale henhla, leswi endlaka leswaku kuva na ku nghenelela lokunga kahle eka ti fibre na malapi. Switirhisiwa swo tsakamisa swihunguta surface tension, leswi pfumelelaka emulsion kuva yi hangalaka naku nghena kahle.
Muxaka
Swikombiso
Swihlawulekiso
Switirhisiwa swa le henhla leswi nga riki swa ayoni (leswi tolovelekeke) .
Ti-ether ta polyoxyethylene ta byala bya mafurha (nxaxamelo wa AEO), ti- alkyl polyglycosides (APG) .
Swi tshamisekile, swi fambisana ngopfu
Switirhisiwa swa le henhla swa fluorocarbon
Tikhemikhali Nxaxamelo wa Capstone (ya nketani yo koma, leyi nga riki na PFOS/PFOA) .
Ultra-low surface tension, ku nghena kahle swinene eka ti substrates leti tikaka ku tsakama. Mpimo wufanele ku lawuriwa swinene kuva ku papalatiwa ku onha matirhelo yale henhla endzhaku ka sintering.
Xitsundzuxo xa nkoka: Ti fluorocarbon surfactants ti tirha swinene kambe ti lava ku cheriwa hi vukheta. Ku tlula mpimo swinga rhurhela eka coating surface hinkarhi wa sintering naswona swihunguta matirhelo ya non-stick.
Ti Thickeners na Rheology Modifiers – Ku Lawula Ku Tekiwa ka Coating
Ti thickeners ti lulamisa viscosity ya emulsion kuva ti sivela ku thona naswona ti lawula kahle ku enta ka coating.
Ku ndlandlamuxa thixotropy xikan’we naku lwisana na kuhisa; swi nga ha hunguta ku vonakala ka coating
Xitsundzuxo lexi tirhaka: Eka swifunengeto swo olova, leswi fanaka eka lapi leri lukiweke hi ku tiya, tirhisa swivumbeko swa low-viscosity leswi nga na thickener yitsongo. Eka swifunengeto swo tika kumbe malapi lawa ya pfulekeke, engetela thickener ku lawula vuenti bya ku nghena.
Swilawuri swa pH na Switiyisisi swa Emulsion
Ti emulsions ta PTFE hi xitalo ti tiyisisiwa hi ti anionic surfactants naswona ti hlayisiwa eka pH 9–10 ku sivela coagulation.
Mati ya ammonia (28 wt%): I regulator leyi tirhisiwaka ngopfu. Yi khuluka hiku hetiseka hinkarhi wa ku omisiwa/sintering, kunga siyi masalela lawa ya kavanyetaka matirhelo.
Switiyisisi swo pfuneta: Ti anionic surfactants tofana na sodium dodecyl sulfate (SDS) na secondary alkyl sulfonate (SAS) ti antswisa ku tiya ka shear ka emulsion hinkarhi wa ku pompa naku pfilunganyeka.
Swihlohloteri swa ku Namarhela – Ti Bonding Resins na Switirhisiwa swo Hlanganisa
Pure PTFE yina matimba yo hlanganisa lawa yanga tsana swinene na ti substrates. Swihlohloteri swa ku namarhela i swa nkoka.
1. Switirhisiwa swo hlanganisa swa silane
Swikombiso: Aminosilane (KH-550), epoxy silane.
Endlelo: Endzhaku ka hydrolysis, ti endla swihlanganisi swa tikhemikhali na fiberglass – Si-O-Si swihlanganisi exikarhi ka silane na nghilazi, na mintlawa ya ntirho ya organic leyi tirhisanaka na PTFE kumbe ti polymers tin’wana.
Xilemukiso: Swifanele ku cheriwa hi vukheta ku papalata ku tshoveka ka emulsion. Pre-hydrolysis kumbe endzhaku ka vutshunguri (ku cheriwa eka lapi loko kungase cheriwa) swa hlohleteriwa.
2. Ku hangalaka ka resin yo boha leyi tiyiselaka mahiselo ya le henhla
Swikombiso: Ku hangalaka loku tluletiwaka hi mati ka polyamide-imide (PAI), polyphenylene sulfide (PPS), polyethersulfone (PES).
Ku tirhisiwa: Switirhisiwa swa nkoka swa swifunengeto leswi nga namarheliki na swihlanganisi leswi tolovelekeke swa swihangalasamahungu swa fiberglass filter media leswi cheriweke na switirhisiwa swa membrane. Ti antswisa ku namarhela na ku hlangana eka xivumbeko xo hetelela.
Swipfuneti swo Vumba Filimi – Ku Ehlisa Mahiselo ya Sintering
PTFE yina melt viscosity yale henhla swinene. Swipfuneti swo endla filimi swi olovisa ku hlanganisiwa ka ti particle hi nkarhi wa sintering.
Ti fluoropolymers leti ta melt-processable ti endla ti molten bonding phases exikarhi ka ti particles ta PTFE hinkarhi wa sintering, leswi tlakusaka coating compactness xikan’we na interfacial adhesion. Ti pfuna ngopfu eka swifunengeto swo tiya kumbe loko ku laveka mahiselo yale hansi ya sintering.
Functional Fillers – Swihlawulekisi swa Xihlawuhlawu hi ku Laveka
Ti fillers ti hangalasiwa hiku kongoma eka emulsion kuva tinyika swivumbeko swokarhi.
Muxaka wa Filler
Swikombiso
Xikongomelo
Swilo swo tata leswi nga onhakiki
Nano/micron alumina, khabayidi ya silikon, silika
Ku antswisa ku lwisana na ku rhurhumela
Switatisi leswi fambisaka/antistatic
Khaboni ya ntima, graphite, ti- nanotube ta khaboni (leti nga ni swilo swo hangalasa) .
Ku hangalasa xihlawuhlawu xa static
Mihlovo ya mihlovo
Iron oxide ya ntima, titanium dioxide
Ku khodiwa ka mihlovo, ku lwisana na UV
Nkoka: Ti fillers tilava ti wetting dispersants leti faneleke (xikombiso, polycarboxylates) kuva ti sivela agglomeration xikan’we naku tiyisisa ku hangalaka loku fanaka.
Ti Defoamers – Ku Sivela Ti Pinholes
Foaming leyikulu yihumelela hinkarhi wa impregnation, leswi endlaka leswaku kuva na swihoxo swa pinhole eka ti coatings.
Muxaka
Swihlawulekiso
Swigwitsirisi leswi nga riki na silicone (swi tsakeriwa) .
Leswi endliweke hi polyether, leswi endliweke hi mafurha ya timinerali. Swi herisa khombo ra masalela ya silicone lawa ya kavanyetaka ku namarhela ka vumbirhi kumbe vutshunguri bya le henhla.
Swigwitsirisi swa silicone
Vuswikoti bya matimba byo defoaming, kambe ku tirhisiwa swi pimiwile eka switirhisiwa laha masalela ya trace silicone ya amukelekaka.
Xitsundzuxo: Eka tithepi ta PTFE letinga ta tirhisiwa eka switirhisiwa swa matirhelo yale henhla ya bonding kumbe coating, ti silicone-free defoamers ta tsakeriwa swinene.
Ti Humectants leti Vumbaka Filimi – Ku Tirhisa Nkarhi na Nkarhi
Trace high-boiling-point solvents kumbe ti polyols (propylene glycol, ethylene glycol) nkarhi wun’wana ti cheriwa ku hunguta ku khuluka ka mati xikan’we naku sivela ku pandzeka kusuka eka ku oma hiku hatlisa.
Nkoka: Leswi aswi tali kutirhisiwa eka maendlelo ya sintering, tani hileswi swiphemu hinkwaswo swa organic swifaneleke ku bola hiku hetiseka hinkarhi wa sintering. Ku tirhisiwa ngopfu swi nga siya masalela ya khaboni.
Nkatsakanyo – Ku hlawula Phasela ra Xipfuneti leri Faneleke
Xikongomelo
Mupfuni loyi a ringanyetiweke
Ku antswisa ku tsakama na ku nghena
Xitirhisiwa xo tsakamisa xa nonionic kumbe fluorocarbon
Lawula ntiko wa xifunengeto
Xigwitsirisi (cellulose kumbe HEUR) .
Tiyisisa emulsion, sivela coagulation
Xilawuri xa pH (mati ya ammonia) + xitiyisisi xa anionic
Tiyisisa vuxaka bya PTFE-substrate
Silane coupling agent kumbe ku hangalasiwa ka resin ya PAI/PPS
Ku antswisa ku tumbuluxiwa ka filimi, ku hunguta sintering temp
Ku hangalasiwa ka PFA kumbe FEP
Engetela ku lwisana na ku onhaka
Xigwitsirisi xa aluminiyamu kumbe silicon carbide
Engetelani ku fambisa
Khaboni ya ntima, graphite kumbe CNT
Sivela ti pinholes eka foam
Xigwitsirisi lexi nga riki na silicone
Ku omisiwa hiku nonoka eka swifunengeto swo tiya
Humectant (propylene glycol) – tirhisa hiku olova
Aokai PTFE yinga endla swihlanganisi swa custom impregnation eka switirhisiwa swokarhi. Tihlanganisi na hina hi substrate ya wena, xilaveko xa vukulu bya coating, na swikongomelo swa matirhelo.
Loko u lava ku dyondza swo tala hi vuxokoxoko bya swihlawulekisi, swiyimo swa xikombelo na swintshuxo leswi endleriweke nxaxamelo wa hina hinkwawo wa swikumiwa, ku katsa na malapi ya mahiselo ya le henhla ya PTFE, tithepi ta mahiselo ya le henhla ya PTFE, mabandhi ya mesh ya PTFE, mabandhi ya muchini wo boha lama nga riki na swirhabyani, lapi ra PTFE ra tlhelo rin’we, mabandhi yo fambisa lama nga lwisaniki na mahiselo ya le henhla na fiberglass leyi nga tiyangiki hi mahiselo ya le henhla malapi, hi kombela u hi tihlanganisa:
Minkarhi hinkwayo hi seketela filosofi ya vutshila na vutshembeki, naswona hi tiyimiserile ku ku nyika swintshuxo swa xiyimo xin’we na vukorhokeri lebyi ehleketiweke.
