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.