Omata bokubhaka bendwangu bezinga lokushisa eliphezulu be-PTFE banikeza izinzuzo ezine ezibalulekile: ukusebenza okungeyona induku (akukho mafutha noma ufulawa odingekayo, amakhekhe athambile akhululwa ngokuhlanzekile), izinga lokushisa elibanzi (-70°C kuya ku-260°C, liphephile kuhhavini kuya efrijini), ukusebenziseka kabusha (izinkulungwane zemijikelezo, ukuhlanzeka kalula), ngisho nokuqhutshwa kokushisa (kuvimbela ukushiswa, ukunsundu okulinganiselwe). Ihambisana ne-FDA yebanga lokudla, ikhipha iphepha lesikhumba futhi yenza ama-silicone amacansi ngokudluliswa okungcono kokushisa kanye nokuthungwa kwendawo ecolekile.

Indwangu yokushisa ephezulu ye-PTFE ibalulekile embonini yokuhlanganisa izingubo. Izicelo ezibalulekile: amabhande angapheli angapheli emishini yokuxubha eqhubekayo (avimbela ukunamathela okunamathelayo okuncibilika okushisayo, ukudlulisa okungenayo imibimbi), isembozo esinganamatheli kanye nendwangu yokugoqa yokucindezela ukushisa okuyisicaba (ivikela amapuleti ekungcolisweni okunamathelayo), amabhande okuhambisa amachashazi okunamathisela/okunamathelayo ngesikhathi sokunamathisela kwe-powder ukomisa/ukucwilisa), kanye nekhava yezicathulo zensimbi zokucindezela isampula. Ubukhulu busukela ku-0.13mm (i-padding light) kuye ku-0.55mm (amabhande okuthutha asindayo).

Indwangu ye-PTFE ye-Anti-static ifinyelelwa ngezindlela ezimbili eziyinhloko: ukumboza i-doping (ukuxuba izigcwalisi ze-conductive ezifana ne-carbon black zibe i-PTFE emulsion, ukwakha inethiwekhi ye-percolation ekugxiliseni okubucayi) kanye nokwelukwa kwe-substrate (ukushumeka imicu yokuqhuba ibe yindwangu ye-fiberglass). Ukumelana nobuso kulawulwa kokuthi 10⁵–10⁹ Ω. Umgomo: dala indlela yokuqondisa edonsa amashaji amile ngokushesha, ivimbele ukunqwabelana okuyingozi. Ukugawula kuyadingeka ukuze kusebenze ngempumelelo.

Indwangu ye-PTFE esezingeni lokushisa eliphezulu (i-PTFE-coated fiberglass) inikeza ukumelana kwamakhemikhali okuhlukile, ukumelana nama-acids agxilile (okuhlanganisa i-aqua regia), ama-alkali aqinile (ezingeni lokushisa lasekamelweni), izinyibilikisi eziphilayo, nama-oxidizing agents. Okuhlukile: izinsimbi ze-alkali ezincibilikisiwe nezinhlanganisela ze-halogen ezisezingeni eliphezulu zihlasela i-PTFE. Ukulimala kwe-coating kuveza i-fiberglass ku-hydrofluoric acid nama-alkali agxilile ashisayo. Izinga lokushisa elingaphezu kuka-260°C linciphisa ukumelana. Ezimweni eziningi zamakhemikhali, indwangu ye-PTFE ihlala izinzile futhi ithembekile.

Ukomisa kuyisinyathelo esibalulekile ekukhiqizweni kwendwangu yezinga lokushisa eliphezulu ye-PTFE. Amaphutha avamile ahlanganisa: ukuqhekeka (ukoma ngokushesha okukhulu, ukucwiliswa kwesikhumba), ukuguquguquka kokumboza (izinhlayiya zithuthela phezulu, isibopho sangaphakathi esibuthakathaka), izimbobo/amabhamuza (umoya ovaleleke noma isitimu), amabala amhlophe kanye nokushova (ukufuduka kwe-surfactant noma ukuhlangana okungaphelele), ukuphuzi/ukupheka (ukushisa ngokweqile kwezithasiselo), i-delamination (i-deposion noma izinga le-orange) ukushwabana), indawo yomile kodwa ingaphakathi imanzi (isikhumba sibamba umswakama), kanye nemiphetho ewugqinsi (umphumela wendandatho yekhofi). Izixazululo zibandakanya amaphrofayili okomisa okulawulwayo, ukungena komoya ngendlela efanele, nokwelashwa kwangaphambili kwe-substrate.

I-PTFE emulsion impregnation yendwangu ye-fiberglass idinga abasizi abahlukahlukene ukuze kuzuzwe ukunamathela okufanayo, ukunamathela okuqinile, kanye nezindawo ezingenasici. Izithasiselo ezibalulekile zifaka: ama-ejenti okumanzisa (ehlisa ukushuba kwesimo, athuthukise ukungena), izingqimba (ukulawula i-viscosity nesisindo sokunamathela), izilawuli ze-pH (zinza i-emulsion ku-pH 9-10), ama-silane coupling agents (athuthukisa ukunamathela engilazini), izinsiza zokwakha ifilimu (PFA/FEP ye-sintering), izigcwalisi ezisebenzayo (ukumelana nokuguga), ama-pifonholes (ukoma kancane). Ukukhethwa kuncike ku-substrate nezidingo zokusebenza.

Indwangu ye-fiberglass enwetshiwe (indwangu yomucu oyinqwaba) ihluke kakhulu kundwangu evamile ye-fiberglass esakhiweni sentambo. Ngokwelashwa kwejethi lomoya elinengcindezi ephezulu, imicu yengilazi eqhubekayo iyahlukaniswa, iboshelwe, futhi ifakwe emculweni ogqamile, ofana nokotini. Lokhu kudala indwangu ewugqinsi, ethambile enokwahlukanisa okushisayo okuphakeme (izingqimba zomoya ezivaleleke), ukuvumelana kangcono, ukusebenza kahle kokuhlunga okuphezulu, nokumelana okuthuthukisiwe kwezinyembezi/okuguquguqukayo - ngezindleko zamandla okubamba kancane kancane. Isetshenziselwa ama-gaskets ashisa kakhulu, amapayipi asongayo, izikhwama zokuhlunga, nama-oven seal.

Ukuhlanzeka kwempahla eluhlaza kuyisisekelo sokusebenza kwendwangu yezinga lokushisa eliphezulu le-PTFE. I-emulsion ye-PTFE ye-High-purity (awekho ama-ion ensimbi, awekho izinsalela zesisindo esiphansi) iqinisekisa ukumelana nokushisa (akukho yellowing kufika ku-260°C), okuqinile okungeyona intonga, namandla aphezulu e-dielectric. Ku-fiberglass, i-E-glass engenayo i-alkali (Na₂O <0.8%) igcina amandla kanye nokwahlukanisa emazingeni okushisa aphezulu; ingilazi ephakathi/ ene-alkali ephezulu idala ukuwohloka. Ukususwa ngokuphelele kwama-ejenti wokuluka kuvimbela i-carbonization kanye ne-delamination. Ukuhlanzeka kuthinta ngqo impilo yesevisi, ukuthobela izinga lokudla, nokuthembeka kukagesi.

Ukomiswa kwangaphambili okufanele kwendwangu ye-fiberglass kubalulekile ekunambeni okulandelayo kwe-PTFE, ukufakwa kwe-resin, noma ukucwiliswa. Izindlela zokwelapha ezintathu eziyinhloko: ukususwa komswakama ku-105-120 ° C (i-10-30 min kuye ngesisindo), ukuhlanza i-dewaxing / thermal ku-300-450 ° C (LOI <0.1%, gwema> 500 ° C), nokushisa kuqala ku-60-100 ° C ngaphambi kokumboza. Lawula ukufana kwezinga lokushisa kukahhavini (±5°C), ukususwa kokuswakama okuphoqelekile, futhi uvikele izindwangu ezifakwe i-silane ngaphansi kuka-110°C. Gcina indwangu eyomile ezikhwameni ezivaliwe noma emakamelweni omile (<30°C, <40% RH).

Indwangu ye-PTFE ephezulu lokushisa (i-PTFE-coated fiberglass) icishe ifane namakhemikhali, kodwa izinto ezithile zibanga ukugqwala ngaphansi kwezimo ezithile. Ukuhlasela okuqondile kwe-PTFE kwenzeka ngezinsimbi ze-alkali ezincibilikisiwe (i-sodium, i-potassium), ama-fluorinating agents aqinile (F₂, ClF₃) emazingeni okushisa aphezulu, kanye nama-alkali aqinile ancibilikisiwe ngaphezu kuka-300°C. Ukugqwala okungaqondile kwenzeka lapho i-hydrofluoric acid (HF), i-alkali egxilile eshisayo, noma i-hot phosphoric acid ingena ezinkingeni zokumboza bese ihlasela i-fiberglass substrate. Ukuze uthole isevisi yamakhemikhali eyeqisayo, sebenzisa ifilimu ye-PTFE ehlanzekile ngaphandle kwe-fiberglass.