PTFE lapi ra mahiselo yale henhla (PTFE-coated fiberglass) i xitirhisiwa xo sefa xa xiyimo xale henhla eka swiyimo swo tika: ku susiwa ka ntshuri wa gasi ya flue (semende, ku hisiwa ka thyaka, ti boilers ta malahla kuya fika eka 260°C), ku sefiwa ka mati lawa ya onhaka (acids, alkalis, oils), ku sefa ka swakudya/murhi leswinga sterile, na swisefo swa HEPA cleanroom. Xiphemu lexi nga namarheliki xi sivela ku caking ka ntshuri naswona swipfumelela ku basisiwa hiku olova. Ti membrane-laminated grades ti fikelela ku humesiwa ka swilo swale hansi swinene.

Lapi ra mahiselo yale henhla ra PTFE ri hlayisa ku pfaleriwa ka gezi lokunene kusuka eka -180°C kuya eka 260°C: volume resistivity >1013 Ω·cm eka 200°C, dielectric constant yitshamisekile eka 2.0-2.1. Ehenhla ka 260°C, PTFE ya olova, ya bola ehenhla ka 327°C, yi lahlekeriwa hi insulation hilaha kunga heriki. Ehansi ka 0°C, insulation ya antswisiwa kambe coating yi hundzuka brittle. Tshama endzeni ka 260°C kuva u kuma matirhelo yo tshembheka.

Switirhisiwa swo hetisa ehenhla leswi cheriweke eka lapi ra fiberglass loko kungase peta PTFE swina nkoka swinene eka matirhelo yohetelela ya lapi ra mahiselo yale henhla ya PTFE. Ti organosilane coupling agents ti endla mabuloho ya molecular exikarhi ka inorganic glass fibre na organic PTFE, leswi tlakusaka matimba ya peel kusuka eka <2 N/cm kuya eka 4-8+ N/cm. Vutshunguri lebyi faneleke byi tlhela byi antswisa ku tiya ka kuhisa (260°C+), matirhelo ya dielectric, na ku tiya ka tikhemikhali. Lapi leri nga tshunguriwangiki ri yisa eka delamination, bubbling, na vutomi byo koma bya ntirho.

Fiberglass weave pattern – plain, twill, kumbe satin – yi khumba swinene swivumbeko swa PTFE swa lapi ra mahiselo yale henhla. Satin weave yinyika matimba yale henhla swinene ya tear (2-3x plain) xikan’we naku olova, leswinga kahle eka dynamic bending. Plain weave yinyika kutshamiseka ka kahle swinene ka dimensional xikan’we naku namarhela ka peel, leswi faneleke eka switirhisiwa swa static. Twill yi ringanisela swivumbeko hinkwaswo leswaku swi tirhisiwa hi ku angarhela.

Kufana ka ku peta ka lapi ra mahiselo yale henhla ya PTFE swikumiwa hi swilo swa mune: ku endliwa ka ku peta (sayizi ya ti particle 0.15-0.35 μm, viscosity, solid content), endlelo ro peta & sintering (ku peta ka blade ku tsakeriwa kuva kufana), khwalithi ya substrate (weave pattern, pre-treatment), na ndzhawu ya vuhumelerisi (20-25°C, <60% RH). Dip + blade combined process yi ringanisela ku nghena na ku olova ka le henhla.

Ku basisiwa loku faneleke na ku hlayisiwa swi engetela vutomi bya lapi ra mahiselo yale henhla ya PTFE. Hlantswa endzhaku ko tirhisa na endzhaku ko titimela. Tirhisa maburashi yo olova, swibasisi leswi nga riki na xihlawuhlawu kumbe byala eka swivati. U nga tshuki u tirhisa ti acid/alkali to tiya, bleach, kumbe swikhwama swa nsimbi. Ku cheriwa ka mafurha ya silicone nkarhi na nkarhi swi hunguta ku onhaka. Landzelela swiletelo leswi ku sivela ku onhaka ka coating.

PTFE lapi ra mahiselo yale henhla na lapi ra silicone hivumbirhi bya swona switirhisa lapi ra fiberglass tani hi xisekelo kambe swihambana hi switirhisiwa swo peta (PTFE resin vs silicone rubber). PTFE yi humelela swinene eka ku nga namarheli, ku lwisana na ku onhaka, na ku lwisana na tikhemikhali ku fika eka 260°C. Lapi ra silicone rinyika ku olova lokukulu, ku pfaleriwa ka gezi, na ku tiya ka ndzilo (kufika eka 230°C). Hlawula hi ku ya hi leswi u swi rhangisaka emahlweni.

Lapi ra mahiselo yale henhla ra PTFE rinyika ku tiya ka ti khemikhali loku hlawulekeke, ku tiyisela ti acids to tiya, alkalis, ti organic solvents, na tigasi leti onhaka. Xihloko lexi xi hlamusela hi vuxokoxoko swilo swa yona leswi tiyeke, swipimelo (tinsimbi ta alkali leti n’okiweke, swiaki leswi tiyeke swa fluorinating), ni swilo swa nkoka swo tanihi mahiselo, ku hlangana ni ntshikilelo wa michini.

Ku cheriwa ka PTFE aswi pimiwi eka lapi ra fiberglass ntsena. Atikili leyi yi tivisa 7 wa ti substrates tin’wana – aramid, carbon fibre, PBI, porous metal, graphite, asbestos (phased out), na ti ceramic fillers – na swihlawulekisi swa tona swa maendlelo, swipfuno, swipimelo, na matirhiselo ya nkoka.

Xihloko lexi xi hlamusela leswaku hikokwalaho ka yini lapi ra fiberglass leri nga riki na alkali ri ri substrate leyi tsakeriwaka eka lapi ra PTFE ra mahiselo yale henhla. Yi katsa ku hlanganisiwa ka tikhemikhali hiku tirhisa ti silane coupling agents xikan’we na swivumbeko swa nkoka swa physical swofana na thermal stability, dimensional stability, na corrosion resistance – ku tiyisisa matirhelo yo leha eka tindzhawu to tika.