Indwangu ye-PTFE enezinga eliphezulu lokushisa (i-PTFE-coated fiberglass) iyisihlungi semidiya ye-premium yezimo ezimbi kakhulu: ukukhishwa kwegesi ye-flue (usimende, ukushiswa kwemfucuza, amabhayela amalahle afika ku-260°C), ukuhlunga uketshezi okugqwalayo (ama-acids, ama-alkali, uwoyela), ukuhlunga ukudla/kwemithi okuyinyumba, nezihlungi zegumbi lokuhlanza i-HEPA. Indawo enganamatheli ivimba uthuli futhi ivumela ukuhlanzwa kalula. Amabanga ane-Membrane-laminated athola ukukhishwa okuphansi kakhulu.

Indwangu ye-PTFE enezinga eliphezulu lokushisa igcina kahle kakhulu ukwahlukanisa kukagesi ukusuka ku- -180°C kuya ku-260°C: ukumelana nevolumu >10¹³ Ω·cm ku-200°C, i-dielectric ihlala iqinile kokuthi 2.0-2.1. Ngaphezulu kuka-260°C, i-PTFE iyathamba, ibole ngaphezu kuka-327°C, ilahlekelwa ukufakwa kwamagciwane unomphela. Ngaphansi kuka-0°C, ukwahlukanisa kuyathuthuka kodwa ukunamathela kuba nzima. Hlala ku-260°C ukuze uthole ukusebenza okuthembekile.

Ama-ejenti wokuqedela ongaphezulu asetshenziswa endwangu ye-fiberglass ngaphambi kokunameka kwe-PTFE abalulekile ekusebenzeni kokugcina kwendwangu yezinga lokushisa eliphezulu ye-PTFE. I-Organosilane coupling agents idala amabhuloho amamolekyuli phakathi kwe-inorganic glass fiber kanye ne-organic PTFE, ekhulisa amandla ekhasi ukusuka ku-<2 N/cm ukuya ku-4-8+ N/cm. Ukwelashwa okufanele futhi kuthuthukisa ukumelana nokushisa (260°C+), ukusebenza kwe-dielectric, nokumelana namakhemikhali. Indwangu enganakiwe iholela ekuqhekekeni, ekubhibhizeni, nempilo yesevisi emfushane.

Iphethini ye-Fiberglass weave - plain, twill, noma satin - ithinta kakhulu izici zendwangu yezinga lokushisa eliphezulu le-PTFE. I-Satin weave inikeza amandla aphezulu okudabula (2-3x plain) kanye nokuguquguquka, ilungele ukugoba okuguquguqukayo. I-Plain weave ihlinzeka ngokuzinza kwe-dimensional okungcono kakhulu kanye nokunamathela kwekhasi, okulungele ukusetshenziswa okumile. I-Twill ibhalansisa zonke izakhiwo ukuze zisetshenziswe ngokujwayelekile.

Ukufana kokunamathela kwendwangu yokushisa ephezulu ye-PTFE kunqunywa izici ezine: ukwakheka kokumboza (usayizi wezinhlayiyana 0.15-0.35 μm, i-viscosity, okuqukethwe okuqinile), inqubo yokugqoka kanye ne-sintering (i-blade enamathela ekhethwayo ukuze ifane), ikhwalithi ye-substrate (iphethini yokuluka, ukwelashwa kwangaphambili), nendawo yokukhiqiza (20-25% R <60%). I-Dip + blade inqubo ehlanganisiwe ilinganisa ukungena nokushelela kwendawo.

Ukuhlanzwa nokugcinwa ngendlela efanele kwandisa impilo yendwangu ye-PTFE enezinga eliphezulu lokushisa. Hlanza ngemva kokusetshenziswa nangemuva kokupholisa. Sebenzisa amabhulashi athambile, okokuhlanza okungathathi hlangothi, noma utshwala ukuze uthole amabala. Ungalokothiono ekugcineni ukwakheka kwayo emazingeni okushisa aphezulu kakhulu noma aphansi kakhulu, i-PTFE ingcono ekumelaneni namakhemikhali futhi kulula ukuyisusa.

Indwangu ye-PTFE enezinga eliphezulu lokushisa eliphezulu nendwangu ye-silicone kokubili kusebenzisa indwangu ye-fiberglass njengesisekelo kodwa ihlukile ezintweni zokumboza (i-PTFE resin vs irabha ye-silicone). I-PTFE iphumelela kakhulu ekungabambeni, ukumelana nokugqoka, kanye nokumelana namakhemikhali kufika ku-260°C. Indwangu ye-Silicone inikeza ukuguquguquka okuphakeme, ukufakwa kukagesi, nokumelana nomlilo (kufika ku-230°C). Khetha ngokusekelwe kokubalulekile kwakho.

Indwangu ye-PTFE enezinga eliphezulu lokushisa inikeza ukumelana kwamakhemikhali okukhethekile, imelana nama-asidi aqinile, ama-alkali, izinyibilikisi eziphilayo, namagesi abolayo. Lesi sihloko sichaza ngezinto ezimelana nayo, imikhawulo (izinsimbi ze-alkali ezincibilikisiwe, ama-ejenti anamandla e-fluorinating), nezici ezibalulekile ezifana nezinga lokushisa, ukugxilisa ingqondo, nokucindezeleka komshini.

Ukufakwa kwe-PTFE akugcini nje ngendwangu ye-fiberglass. Lesi sihloko sethula ama-substrates angu-7 ahlukile - i-aramid, i-carbon fibre, i-PBI, insimbi enezimbotshana, i-graphite, i-asbestos (ikhishiwe), kanye nezigcwalisi ze-ceramic - nezici zazo zenqubo, izinzuzo, imikhawulo, kanye nezicelo ezibalulekile.

Lesi sihloko sichaza ukuthi kungani indwangu ye-fiberglass engena-alkali iyisisekelo esincanyelwayo sendwangu ye-PTFE enezinga lokushisa eliphezulu. Ihlanganisa ukubopha kwamakhemikhali ngama-ejenti ahlanganisayo we-silane kanye nezakhiwo ezibalulekile zomzimba njengokuzinza kwe-thermal, ukuzinza kwe-dimensional, nokumelana nokugqwala - iqinisekisa ukusebenza okuhlala isikhathi eside ezindaweni ezinokhahlo.