Bawo niPTFECoatingonTeflonAṣọ-Iwọn otutu-giga ti o faramọ Aṣọ Fiberglass?
PTFE(polytetrafluoroethylene)hasanextremelylowsurfaceenergyandisfamously knownasa'ti kii-stick' ohun elo.Nitorina, ko le ṣe taara kemikali bondedtofiberglassfabriclike awọn aṣọ ibora.Asanalyzed nipasẹTeflonhigh-temperaturecl othmanufacturer–JiangsuAokaiNewMaterialTechnologyCo.,Ltd.,isopọ laarin awọn woistypically ti o waye nipasẹ fisiksicalanchoringandmechanicalinterlocking,fikun nipasẹkemikaprimertreatmentorhot-meltadhesioncompositees.
Awọn ọna kan pato fun isọpọ Aṣọ otutu-giga pataki ninu pẹlu atẹle naa:
1.MechanicalInterlocking(PhysicalBonding) Eyi jẹ ọna ti o ṣe pataki julọ.Fiberglassfabricit ara rẹ ni ọrọ-ọrọ.Nigbati PTFEemulsionordispersioni ti wa ni idasilẹ tabi ti a bo sori fiberglassfabric,PTFE wọ inu awọn gapsandi aaye laarin awọn fibers.Lẹhin gbigbe ati awọn iwọn otutu giga. intering(to 360–400°C), awọn PTFE patikulusmeltinto tẹsiwaju fiimu, fifẹ giripfiberbundles bi aimoye ' anchorhooks. 'Sibẹsibẹ, gbigbekele awọn ọna ti o jẹri awọn esi ti o ni opin si agbara, ati pe o nilo afikun ohun elo.
Eyi jẹ ilana pataki fun gbogbo awọn ile-iṣelọpọ PTFEfiberglass ti o ni agbara giga. Oju oju ti fiberglassfabrici ni itọju akọkọ pẹlu asilanecouplingagent (suchasaminosilane,epoxysilane, ati bẹbẹ lọ):
Oneendofthesilane(ẹgbẹ siloxy), afterhydrolysis, cankemikaly sopọ mọ awọn ẹgbẹ hydroxyl (-OH) lori oju ti awọn gilaasifibers;
Ni ipari, awọn ẹgbẹ ti o niiṣe ti o niiṣe, o le kọja-linkorstronglyadsorb pẹlu awọn ohun elo adhesive si awọn ohun elo fluorinated alakoko ni atẹle iṣe iṣere tabi aṣọ.
3.ChemicalPrimerTransitionLayer
Ibo taara PTFE awọn esi ti a ti sọ di mimọ lẹhin ifaramọ, soadedicatedprimerisisually ti a lo ni akọkọ si fiberglassfabric. Alakoko yii ni ninu:
Adhesiveresins: Suchaspolyamide-imide (PAI), polyphenylenesulfide (PPS), polyethersulfone (PES), tabi polytheretherketone (PEEK), eyiti o ni omi tutu ati awọn glassfibers ti o lagbara, ati pe o le duro ni iwọn otutu ti o tẹle PTFEsintering ilana.
PTFEmicrowder: Lati rii daju pe alakoko ati igbẹhinPTFEtoplayer le papọ.
Eleyi alakoko ṣe aṣeyọri imora kẹmika ati ifarakanra ti ara pẹlu oluranlowo-itọju-fiberglassfabric, ti n ṣe agberobusttransitionlayer.PTFEtoplayer nfi pẹlu PTFE paati akọkọ lakoko mimu, nitorinaa ni taara ni iyọrisi agbara giga.
4.Hot-MeltAdhesiveFilimLamination(LaminationMethod) Ọna yii, ti JiangsuAokai NewMaterialTechnologyCo.,Ltd., ti a lo si ti a ti ṣẹda tẹlẹ, fiimu nipọnPTFEfilimstofiberglassfabric.NitoriPTFEhasanextremelyhighmeltviscosity(isunmọ). aly10¹⁰–10¹²Pa·s), ithardlyflowmeven when heatedaboveitsmeltingpoint,sodirecthot-pressbonding ko ṣee ṣe.Amelt-processable'gbona-meltadhesive' gbọdọ jẹ lilo, ni deede: FEP(fluorinadethylenepropylene) tabi PFA(perfluoroalkoxy) awọn fiimu ,eyiti o ni aaye gbigbona juPTFE (isunmọ 260–310°C) msurface.Ninu ilana,FEP/PFAfiimu ti o wa laarin PTFEfilmandfiberglassfabric,gbona ati titẹ,ati lẹhin itutu agbaiye,ailagbara ti bajẹ.
5.Gradient StructurenipasẹMultiple Impregnation ati Awọn Yiyi Ibaraẹnisọrọ
Ọpọlọpọ awọn iwọn otutu ti o ga julọ, awọn ohun elo ti n ṣe agbejade ọpọlọpọ-ilana impregnation: Ipilẹṣẹ akọkọ ti a lo PTFE ipinfunni ti o ni awọn ọna asopọ ati awọn nkan isọpọ, ti o gba laaye primertopenetratedeepintofiberbundles. Leyin ti o ba ti ṣe, ọpọlọpọ awọn atẹle atẹle ifasẹyin pẹlu PTFEemulsion ati aṣeyọri awọn igbesẹ igbesẹ ti a gbejade, ti o mu ki o pọ si ni giga ti PTFE lori oju-aye. Eyi ṣẹda akojọpọ ni gradient iyipada lati inu fiberglassfabric si PPTFE mimọ, laisi wahala inu ati agbara ifaramọ to lagbara.
Ipari
Lakotan, isọdọkan laarin PTFE aṣọ ati fiberglassfabricinTeflonhigh-otutu aṣọ ti kii ṣe ni irọrun “gluing” –itisacomplex Plingagents andprimerstoachieve chemical bonding and transformation, and throughhigh-ipetuturessintering to complete theemelt-Integration of thefilmlayers.IfonlypurePTFE ni a bo ni taara, gbogbo rẹ yoo peeli pẹlu omije asingle.
