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 aphansi kancane. Isetshenziselwa ama-gaskets ashisa kakhulu, amapayipi asongayo, izikhwama zokuhlunga, nama-oven seal.

Ukuhlanzeka kwempahla eluhlaza kuyisisekelo sokusebenza kwendwangu yezinga lokushisa eliphezulu ye-PTFE. I-emulsion ye-PTFE ye-High-purity (awekho ama-ion ensimbi, azikho 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 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 kumswakama okuphoqelekile, futhi uvikele izindwangu ezifakwe i-silane ngaphansi kuka-110°C. Gcina indwangu eyomile ezikhwameni ezivaliwe noma emakamelweni omile (<30°C, <40% RH).

Itheyiphu ye-PTFE yokushisa okuphezulu inokumelana nesifutho sikasawoti esihle kakhulu, kodwa amaphuzu abuthakathaka ungqimba olunamathelayo kanye nemiphetho ye-fiberglass substrate. Izindlela zokuhlola: Ukuhlolwa kwe-1000h neutral salt spray (NSS), ukulinganisa ukugcinwa kwamandla ekhasi (≥80% kuyadingeka), ukonakala okubonakalayo (ukuphakamisa, ukubhamuza), kanye nokugqwala kwe-substrate yensimbi. Ezindaweni zasolwandle nezinosawoti omningi: sebenzisa i-silicone PSA (hhayi i-acrylic), i-PTFE substrate efakwe ngokugcwele, vala imiphetho nge-sealant emelana nesimo sezulu, bese usebenzisa i-primer endaweni yensimbi.

I-PTFE high-temperature fabric (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 anamandla ancibilikisiwe angaphezu kuka-300°C. Ukugqwala okungaqondile kwenzeka lapho i-hydrofluoric acid (HF), i-alkali egxilile eshisayo, noma i-hot phosphoric acid ingena ezinsongeni futhi ihlasela i-fiberglass substrate. Ukuze uthole isevisi yamakhemikhali eyeqisayo, sebenzisa ifilimu ye-PTFE ehlanzekile ngaphandle kwe-fiberglass.

Itheyiphu ye-PTFE yokushisa okuphezulu ilahlekelwa ukunamathela ngemva kokusetshenziswa okuphindaphindiwe ngenxa yokungcoliswa kwendawo (uthuli, uwoyela we-silicone), ukwehluleka kokunamathelayo okunamathelayo (insalela), noma ukubopha okubuthakathaka kwe-substrate. Izixazululo: i-silicone ye-high-crosslink i-PSA (ukufuduka okuphansi, i-balanced tack/amandla okubamba), ukwelashwa kwe-primer ku-PTFE substrate, ukusekelwa kwe-fiberglass ecinene, nokubamba okufanele (indawo ehlanzekile, ikhasi elipholile, i-engeli engu-180°). Ukuhlolwa komthamo kuqinisekisa ukuthuthuka.

Indwangu ye-PTFE enezinga eliphezulu lokushisa (i-PTFE-coated fiberglass) inokumelana nokushaqeka okuhle kakhulu okushisayo ngaphakathi kwebanga layo elivamile lokusebenza elingu -70°C kuya ku-260°C. Ingakwazi ukubekezelela ukuhamba ngebhayisikili okusheshayo kwezinga lokushisa, isb, ukusuka efrijini -50°C 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 kusuka emazingeni okushisa angaphezu kuka-300°C (eduze kwendawo yokuncibilika ye-PTFE's 327°C) kuzodala ukuqhekeka kanye nokuncipha ngokushesha. I-fiberglass substrate inikeza ukuzinza kwe-dimensional; ukunamathela kwe-PTFE kuyisici esikhawulelayo.

Indwangu ye-PTFE enezinga eliphezulu lokushisa eliphezulu isetshenziswa kakhulu 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 kokubola, ukunwetshwa kokukhishwa kwendwangu yensimbi ukubumba okuyinhlanganisela, kanye nokusonga kokufakwa kukagesi/okushisayo. I-FDA ne-UL amamaki ayatholakala.

Itheyiphu ye-PTFE yokushisa ephezulu egcinwe ngaphansi kwezimo ezishiwo (10-25°C, 40-70% RH, kude ne-UV/ingcindezi enkulu) ineshalofu elijwayelekile lezinyanga ezingu-3-6 (amabanga eprimiyamu afika ezinyangeni eziyi-12). Imikhawulo eyinhloko yokuwohloka: amandla ekhasi akumele ehle ngaphansi kuka-70% yenani lokuqala; akukho zinsalela zokunamathela ngemva kokususwa kwezinga lokushisa eliphezulu; akukho carbonization noma ukuqhekeka ezingeni lokushisa elilinganiselwe. Ukuhlola okusheshayo: umuzwa wokuzikhulula mathupha, ukuhlolwa kwensalela engu-260°C, nokuhlolwa kokuncipha kwe-lamination.

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