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).

Ukuncipha okushisayo kwendwangu ye-Fiberglass kuyimbangela eyinhloko ye-PTFE tape dimensional ukungasebenzi. Emazingeni okushisa e-PTFE sintering (360-400°C), ingcindezi yokwaluka eyinsalela iyakhululwa. Uma kungavinjelwa, indwangu iyancipha; uma kuvinjelwa, ukucindezeleka okucashile kukhiyiwe, okubangela ukuncipha kamuva ngesikhathi sokuphulukisa okunamathelayo (150-200°C) kanye nokushisa kokugcina. Isixazululo: sebenzisa i-fiberglass esethwe ngaphambi kokushisa ene-<0.5% shrinkage ku-400 ° C, esusa ukucindezeleka okusele ngaphambi kokumboza.

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.

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.

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), i-fluorinating agents eqinile (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.

Indwangu ye-PTFE ephezulu yokushisa (i-PTFE-coated fiberglass) inokumelana nokushaqeka okuhle kakhulu okushisayo ngaphakathi kwebanga lokusebenza elijwayelekile elingu -70°C kuya ku-260°C. Ingakwazi ukubekezelela ukuhamba ngebhayisikili okusheshayo kwezinga lokushisa, isb, ukusuka ku- -50°C efrijini ukuya emshinini wokunyathelisa oshisayo ongu-260°C. Amabanga e-Premium aze asinde ekupholiseni kungazelelwe ukusuka ku-260°C ukuya ku-10°C emanzini. Nokho, ukushaqisa okokusebenza emazingeni okushisa angaphezu kuka-300°C (eduze kwendawo yokuncibilika ye-PTFE's 327°C) kuzodala ukuqhekeka kanye nokuncibilika ngokushesha. I-fiberglass substrate inikeza ukuzinza kwe-dimensional; ukunamathela kwe-PTFE kuyisici esikhawulelayo.

Indwangu ye-PTFE enezinga eliphezulu lokushisa eliphezulu isetshenziswa kabanzi embonini yamakhemikhali ezintweni eziyisikhombisa ezibalulekile: ama-flange gaskets namapayipi afakwa ngaphakathi (amelana nama-acids aqinile/ama-alkali), i-reactor kanye ne-tank linings (ivimbela ukugqwala kwensimbi, ukuhlanzeka kalula), izikhwama zokuhlunga zegesi egqwalayo (efika ku-260°C), ukunwetshwa kokubola kwe-corrosion, ukunwetshwa kokukhishwa kwendwangu yensimbi ukubumba okuyinhlanganisela, kanye nokusonga kokufakwa kukagesi/okushisayo. I-FDA ne-UL amamaki ayatholakala.

Indwangu ye-PTFE yokushisa ephezulu (PTFE-coated fiberglass) inikeza izinzuzo ezine ezibalulekile njenge-anti-corrosion lining: ukunganaki kwamakhemikhali (kumelana ne-aqua regia, ama-alkali aqinile, izinyibilikisi), ububanzi bokushisa (-70 ° C kuya ku-260 ° C ngokuqhubekayo, ukuphakama okungu-350 ° C), ukuzinza kwe-dimensional (<0.5% ukuqina), ukuhlanza ubuso obunzima, ukuvimbela ukuqina). Isetshenziswa kumapayipi amakhemikhali, imibhoshongo ye-desulfurization, amathangi okukhetha, kanye nempahla yokudla/ekhemisi. Amabanga e-FDA ayatholakala.