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 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).

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 e-peel (≥80% edingekayo), ukukhubazeka okubukwayo (ukuphakamisa, amabhamuza), 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 ezindaweni zensimbi.

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.

Itheyiphu ye-PTFE yokushisa okuphezulu ilahlekelwa ukunamathela ngemva kokusetshenziswa okuphindaphindiwe ngenxa yokungcoliswa kwendawo (uthuli, uwoyela we-silicone), ukwehluleka kokunamathela okunamathelayo (insalela), noma ukubopha okubuthakathaka kwe-substrate. Izisombululo: i-silicone ye-high-crosslink i-PSA (ukufuduka okuphansi, i-balance 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 ukuthuthukiswa.

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.

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 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.