Engtin Nge Teflon-a PTFECoating chuHigh-TemperatureCloth chuFiberglassFabric-ah A Innghah?
PTFE(polytetrafluoroethylene) hian lei chung chakna hniam tak tak a nei a, chu chu 'non-stick'material anga hriat lar tak a ni.Chuvangin, fiberglassfabric-ah direct-a chemicallybonded a ni thei lo, ordinarycoatings angin.Teflonhigh-temperaturecl othmanufacturer–JiangsuAokaiNewMaterialTechnologyCo.,Ltd., an pahnih inkara inzawmna chu physicalanchoring leh mechanicalinterlocking hmanga tih theih a ni tlangpui a, chemicalprimertreatmentorhot-meltadhesioncompositeffects hmanga tihpun a ni.
Teflon temperature sang tak puan bonding dan bikte chu a hnuaia mite hi a ni ber:
1.MechanicalInterlocking(Tisa lam inzawmna) . Hei hi a bulpui ber a ni.Fiberglassfabricit hi poroustextile a ni.PTFEemulsion emaw dispersion emaw chu fiberglassfabric-ah a inhnim hnawih chuan,PTFE chu fiber inkar gap leh intersectionpoint-ah a lut a.A vawt hnuah leh temperature sang takah intering(approximately360–400°C),thePTFEparticlesmeltintoacontinuousfilm, firmly grippingthefiberbundleslikecountless'anchorhooks.'Amaherawhchu, he method chauh rinchhan hian bondingstrength a la tikhawtlai a, a tlangpuiin supplementarymeasures a mamawh a ni.
2.SilaneCouplingAgentPretreatment(ChemicalBridging) hmanga tihdam theih a ni.
Hei hi PTFEfiberglassfabrics quality sang tak tak siamna atana process bulpui ber a ni.Fiberglassfabricis lei chunglam chu silanecouplingagent(suchasaminosilane,epoxysilane,etc.) hmanga enkawl hmasak a ni:
Thesilane(siloxygroup) tawp pakhat,hydrolysis hnuah,glassfibers-a hydroxylgroup(-OH)-te nen chemical-in a inzawm thei a;
3.ChemicalPrimerTransitionLayer hmanga tihchhuah a ni
DirectlycoatingPTFEresultsinpooradhesionaftersintering, soadedicatedprimeri chu fiberglassfabric-ah hman hmasak ber a ni tlangpui.He primerlayer hian a tlangpuiin:
Adhesiveresins: Polyamide-imide(PAI),polyphenylenesulfide(PPS),polyethersulfone(PES),orpolyetheretherketone(PEEK),glassfiber-a hnim tha leh nghet taka inzawmkhawm, a hnu lama thigh-temperaturePTFEsinteringprocess-a tuar thei.
PTFEmicropowder: Primerary leh finalPTFEtoplayer chu a inzawmkhawm theih nan.
He primerlayer hian coupling-agent-treated fiberglassfabric nen chemicalbonding leh physicalinterlocking a ti thei a, transitionlayer bulpui tak a siam a ni.Chumi hnuah chuan PTFEtoplayer chuan PTFEcomponent chu primer-ah intering laiin a fuse a, chu chuan indirect-in highdhesionstrength a nei thei a ni.
4.Hot-MeltAdhesiveFilmLamination(LaminationMethod) hmanga siam chhuah a ni. Hetiang kawng hi,JiangsuAokaiNewMaterialTechnologyCo.,Ltd.-in a hman,bondpre-formed,thickPTFEfilm-a fiberglassfabric-a siam nan hman a ni.A chhan chuPTFE hianmeltviscosity sang tak a nei (approxim ately10⊃1;0–10⊃1;⊃2;Pa·s),a meltingpoint aia a lum chuan pasarih a luang lo va, chutiang chuan directhot-pressbonding chu a theih loh.Amelt-processable'hot-meltadhesive' hman a ngai a, a tlangpuiin: FEP(fluorinatedethylenepropylene) emawPFA(perfluoroalkoxy) film emaw hmanga siam a ni ,chu chuPTFE(260–310°C vel) aiin a meltingpoint hniam zawk a ni.Melting hnuah, fiberglassfabricandinter-diffuse/meltwith thePTFEfil an hnim thei msurface.Process-ah hianFEP/PFAfilm chuPTFEfil leh fiberglassfabric inkarah dah a ni a, a lum a, a press a, a lum hnuah a ti lum a, a strong bondsformed a ni.
5.GradientStructureviaImpregnation lehSinteringCycle tam tak hmangin
Temperature sang conveyorbel lehchitecturalmembranematerial tam tak chu multiple-impregnationprocess hmangin siam a ni: Naupai hmasa ber chu dilutePTFEdispersion hmangin binders leh couplingagents a awm a, chu chuan primer chu fiberbundles chhung thuk takah a lut thei a ni. Intering hnuah, a hnu lama naupai tam tak chu purePTFEemulsion leh a hnungzuiin intering step hrang hrang hmanga tih a ni a, chu chuan leihnuaiah PTFE thianghlimna sang zawk a tipung a ni. Hei hian fiberglassfabrictothepurePTFE aangin compositionally gradienttransitionlayer a siam a, chhungril lama chakna leh inzawmna chakna chak tak a nei a ni.
Tawpna
Thuhmahruaiah chuan,PTFEcoating leh fiberglassfabricinTeflontemperature sang tak puan inkara inzawmna chu 'gluing'–a buaithlak(systematicengineeringprocess) chauh a ni lo:physicalanchoring totakerootinthefibers,throughcou plinggents leh primers te hian chemicalbonding leh transition an nei thei a, leh temperature sang tak intering hmangin filmmlayers temelt-integration an ti famkim thei a ni.IfonlypurePTFE were directlycoated, theentirelayerwould peeloffwithasingletear.
