Ukugqoka okufanayo ngesikhathi se-PTFE emulsion impregnation yendwangu ye-fiberglass iyindlela yokuphila yekhwalithi yomkhiqizo. Izimbangela zokwemboza ngokungalingani: ukwehluleka okungeyona intonga (ukunamathela ezindaweni ezizacile), ubuthakathaka bomshini (ukugxiliswa kwengcindezi, ukudabuka), ukungazinzi kukagesi (i-voltage ehlukanayo yehla ibe ngu-1/10), ukungena kwamakhemikhali (ukugqwala kwephinifa), izinkinga zobukhulu (i-warpage), kanye nokukhubazeka kokucubungula (ukuzulazula kwebhande, ukuhlukahluka kogqinsi). Ukumbozwa okufanayo kudinga ukulawulwa okunembile kwe-emulsion viscosity, okuqukethwe okuqinile, ukungezwani kwendwangu, izikhala zokuminyanisa, kanye namaphrofayili okomisa/ama-sintering anezindawo eziningi.

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 yenza izinguquko zevolumu ngokungazelelwe (1-2%) ku-19°C kanye no-30°C izinguquko zesigaba. Ukuze ugweme ukugoqa, ukuklebhuka, kanye ne-delamination: ukucaciswa kwedizayini kokunwetshwa kwamahhala, gwema ukushuba ngokusebenzisa amazinga okushisa esigaba, 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 intonga (akukho amafutha 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 yezinga 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 yokuhlanganisa 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 yokushisa okuphezulu (i-PTFE-coated fiberglass) inikeza ukumelana kwamakhemikhali okuhlukile, ukumelana nama-acids agxilile (okuhlanganisa i-aqua regia), ama-alkali aqinile (ezinga lokushisa legumbi), 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 (anciphisa ukushuba kwesikhumba, athuthukisa ukungena), ama-thickeners (ukulawula i-viscosity nesisindo sokumboza), 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-pifonholents), ama-designers (ukumelana nokugqoka) (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 aphansi kancane. Isetshenziselwa ama-gaskets ashisa kakhulu, amapayipi asongayo, izikhwama zokuhlunga, nama-oven seal.

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.

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.