Ukuhlanzeka kwempahla eluhlaza kuyisisekelo esiyisisekelo sekhwalithi yendwangu yezinga lokushisa eliphezulu ye-PTFE. Ukungcola (iziqalisi eziyinsalela, izinto ezisetshenziswayo, ama-ion ensimbi, ama-sizing agents angcolile) kubangela ukuwohloka kokushisa ngaphambi kwesikhathi (amabhamuza, amabhamuza angaphezu kuka-260°C), izindawo ezingabambeki ezingalingani (amaphoyinti okunamathela), ukuncishiswa kokufakwa kukagesi (ukulahleka kwe-dielectric, ukwehla kwamandla kagesi), ukuwohloka kokushisa okuphansi (kanye nombala ophuzi wokuqhekeka), ukuqina kombala ophuzi Izinto zokusetshenziswa ezimsulwa eziphezulu ziqinisekisa ukuthobela kwe-FDA, impilo ende, indwangu ye-PTFE esebenza kakhulu.

I-PTFE-coated fiberglass sintering yendwangu idinga isikhathi esinembile sokubamba ku-370-400°C. Izithando zomlilo eziqhubekayo: 30-90s (zacile) ukuya ku-3-5+ amaminithi (aminyene). Izithando zenqwaba: 5-15 min. I-under-sintering idala i-opaque, izimbotshana ezimahhadlahhadla; i-sintering ngokweqile idala ukuphuzi, ukonakala, nokukhishwa kwegesi ye-fluoride enobuthi. Ukulungiselela inqubo: sebenzisa izilandeleli zezinga lokushisa esithandweni, yenza ukuhlola okubonakalayo (okungafihli lutho, okuguquguqukayo), futhi wenze ukuhlola ukudonsa kwetheyiphu. Njalo qinisekisa ukufana kwezinga lokushisa eliwugqinsi olugcwele.

Indwangu ye-PTFE enezinga eliphezulu lokushisa idinga ukuphathwa ngokucophelela ukuze kuqinisekiswe ukuphepha nokuphila isikhathi eside. Izinyathelo zokuqapha eziyinhloko: ungalokothi udlule u-260°C (ngaphezulu kuka-320°C ukhipha intuthu enobuthi), gwema ama-crease abukhali (ama-cracks ambozwe, aveze i-fiberglass), akukho ukuhlanzwa okulimazayo (uboya bensimbi bulimaza indawo enganamathi), gcina imvume yokunwetshwa okushisayo (ivimbela ukudabuka), futhi ufake esikhundleni lapho kubhamuza noma kuhlutshiwe. Isitolo sigoqiwe, kude ne-UV. Gqoka amagilavu ​​avikela ukushisa ngesikhathi sokuphatha.

Indwangu ye-PTFE enezinga eliphezulu lokushisa ine-coefficient of thermal expansion (CTE) engu-30-60 ppm/°C (i-warp/weft) – ephakeme kune-fiberglass iyodwa kodwa iphansi kakhulu kune-PTFE emsulwa (100-200 ppm/°C). I-PTFE ibhekana nokushintsha kwevolumu okungazelelwe (1-2%) ku-19°C no-30°C noshintsho lwesigaba. Ukuze ugweme ukugoqa, ukuklebhuka, kanye ne-delamination: imvume yedizayini yokunwetshwa kwamahhala, gwema ukushuba ngokusebenzisa amazinga okushisa okushintsha kwesigaba, sebenzisa ama-tensioner azenzakalelayo kumabhande okuthutha, futhi sebenzisa idizayini yokugqagqana emelene nokubhibha. Ukuhlola njalo ukugeleza okubandayo kubalulekile.

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.