PTFE (polytetrafluoroethylene) hasanextremelylowsurfaceenergyandisfamously knownasa'non-stick' material. Ergo non potest bedirectlychemicallybondedtofiberglassfabriclikeordinarycoatings.AsanalyzedbyTeflonhigh-temperaturecl othmanufacturer-JiangsuAokaiNewMaterialTechnologyCo.,Ltd., vinculum inter duas istypice per physicam anchoring et mechanicalem interclusionem, suppletionem bychemicalprimertreatmentorhot-meltadhesioncompositorum effectuum.
Thespecificmethods forbondingTeflon-temperatus-cloth-mainlyinclude the following:
1.MechanicalInterlocking (PhysicalBonding) Thisisthemostfundamentalapproach.Fiberglassfabricitselfisaporoustextile. QuandoPTFEemulsionordispersionisimpregnatedorcoatedonto the fiberglassfabric, in PTFE penetrat intothegaps et intersectio punctorum inter fibrarum. intering(approximate360-400°C), in PTFEparticlesmeltintoa continuum membranae, fiberbundae quasi innumerae anchorae tenentes.
Thisisalmost thecoreprocessfor all high qualityPTFEfiberglassfabrics. Thesurface of the fiberglassfabricis firsttracted withasilanecouplingagent ( suchasaminosilane, epoxysilane, etc.);
Oneendofthesilane(siloxygroup), afterhydrolysis, canchemicallybond with thehydroxylgroups(-OH)onthesurface of theglassfibers;
Alter terminus, portans functiones organicas, potest transire-linkor fortiter adsorb cum capite hesivecomponents in fluorinatedprimerduring subsequentimpregnationorcoating. Haec efficax aedificatio 'molecularbridge' inter facies organicandinorganicas.
3.ChemicalPrimerTransitionLayer
DirectlycoatingPTFEresultsinpooradhesionaftersintering, soadedicatedprimerisusually applicata prius ad fiberglassfabric.Thisprimerlayergenerally continet:
Adhesiveresins: Suchaspolyamide-imide(PAI), polyphenylenesulfide(PPS), polyethersulfone(PES), orpolyetherketonum(PEEK), quae bonam et validam adhaesionem toglassfibrarum habent, et in processu intercedente sustineri potest.
PTFEmicropowder: Praesens ut primara et ultimamPTFE lusori canfus in unum.
Thisprimerlayerachieveschemical bonding andphysicalin locking with the copuling agent-tractated fiberglassfabric,forming arobusttransitionlayer. The PTFE to- player thenfuses with the PTFE componentin the primerduringsintinging, there by indirectly assequens altam adhesion- sionem.
4.Hot-MeltAdhesiveFilmLamination (LaminationMethod) Thismethod, adhibitum per JiangsuAokaiNewMaterialTechnologyCo.,Ltd., adhibetur tobond pre-formatum, crassus PTFEfilmstofiberglassfabric. Quia PTFEhasanextremely highmelt viscositas (proximum ately10⊃1; ⁰-10⊃1; 2; Pa·s), vix fluit cum calefacto supraveitsmeltingpoint, sodirecthot-pressbondingis esse non potest. FEP(fluorinatedethylenepropylene)orPFA(perfluoroalkoxy)filins , quae habent puncta quamPTFE (approximately260-310°C). Postea liquefaciunt, fibreglassfabricandinter diffundunt / liquefaciunt cum PTFEfilmsurface. In processu, FEP/PFA filmis collocatur inter PTFE filmandthefiberglassfabrica, calefacta et pressa.
Multiplex temperatura conveyorbelts et architecturalmembranematerials efficiuntur per multam processum impregnationis: Prima impregnatio usuum adilutatam PTFEdispersionem continens ligamenta et coniunctiones agentium, permittens primas aperturas in fibrarum fasciculis. Interposito, multiplex subsequentis praegnatio, cum pura PTFEemulsione et successivis inter se passi efficiatur, consequitur in augendo altiorem puritatem ipsius PTFE in faciem. Thiscreatesacompositionallygradienttransitionlayer from the fiberglassfabrictothe puroPTFE,withoutinternum vis and strong bonding force.
conclusio
Insummarium, ligamentum inter PTFE cotingens et fiberglassfabricinTeflon high-temperatureclothis notsimply'conglutinando' -itisacomplex (systematicengineering processum): per physicalanchoring totakerootin the fibrarum throughcou plingagentia et primersto perficiendo chemicali vinculo et transitione, et per temperaturas altas interinge ad perfectam integrationem membranarum.
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