Lapi ra mahiselo yale henhla ya PTFE (PTFE-coated fiberglass) rina ku tiya ka kahle swinene ka thermal shock endzeni ka ndzhawu ya rona ya ntolovelo yo tirha ya -70°C kuya eka 260°C. Yikota ku tiyisela ku rhendzeleka ka mahiselo hiku hatlisa, xikombiso, ku suka eka -50°C freezer kuya eka 260°C hot press. Ti grade ta premium ti pona hambi kuri ku kufumela ka xitshuketa kusuka eka 260°C kuya eka mati ya 10°C. Hambiswiritano, ku chavisa swilo leswi kusuka eka mahiselo yale henhla ka 300°C (ekusuhi na PTFE’s 327°C melting point) swita endla leswaku kuva na ku pandzeka ka xihatla xikan’we na delamination. Substrate ya fiberglass yinyika ku tiya ka dimensional; xifunengeto xa PTFE hi xona xi sivelaka.

Lapi ra mahiselo yale henhla ra PTFE ritirhisiwa ngopfu eka indasitiri ya tikhemikhali eka switirhisiwa swa nkoka swa nkombo: ti flange gaskets nati pipe linings (yi lwisana na ti acids/alkalis to tiya), ti reactor na ti tank linings (yi sivela ku bola ka nsimbi, ku basisiwa hiku olova), ti filter bags ta corrosive flue gas (kufika eka 260°C), ti anti-corrosion expansion joints ta ti ducts, anti-adhesion ti pads to welda, lapi ro humesa ra composite molding, na swifunengeto swo pfalela gezi/ku hisa. Tigredi ta FDA na UL ta kumeka.

Lapi ra PTFE ra mahiselo yale henhla ritshamisekile kuya fika eka 300°C, kambe eka ndzilo ri bola naswona ri humesa tigasi letingana chefu swinene: hydrogen fluoride (HF) (corrosive, pulmonary edema) na perfluoroisobutylene (PFIB) (leyi nga riki na muhlovo, yingari na nun’hwelo, ~10x leyingana chefu kutlula phosgene, kungari na antidote). Nakambe khaboni monokisayidi, masalela ya PFOA, na ti trace dioxins. Swisirhelelo leswi tolovelekeke swa musi a swi tirhi; tirhisa switirhisiwa swo hefemula leswi tiyimeleke (SCBA). Swikombiso swi nga ha hlwela.

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.

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.