Lesi sifinyezo sezobuchwepheshe esivela ku-Jiangsu Aokai sihlaziya ukuthi amazinga okushisa aphansi kakhulu noma aphezulu ayonakalisa kanjani indwangu ye-PTFE yezinga lokushisa eliphezulu. I-sintering ephansi ishiya izinhlayiya zingancibilikisiwe, okubangela ama-micro-pores, ukubopha okubuthakathaka kwe-coating-substrate, izindawo ezimahhadlahhadla, amandla angenamandla emishini, kanye nokubukeka kwe-milky opaque. Ukushisa ngokweqile kudala ukuwohloka kokushisa kwe-PTFE, kukhiqiza amaphinifa, amabhamuza, ukonakala, ukushintsha kombala okuphuzi ukuya kwabamnyama, nokukhipha intuthu enobuthi. Kokubili okudlulele kulimaza ukubumbana, ukusebenza okunganamatheli, ukuguquguquka, ukwahlukanisa, nokuzinza kwe-dimensional.

I-PTFE high-temperature insulating gaskets yendwangu ihlanganisa amandla aphezulu e-dielectric (azinzile ngaphansi komswakama), -70°C kuya ku-260°C izinga lokushisa, ukumelana kwamakhemikhali kwendawo yonke (ngaphandle kwezinsimbi ze-alkali ezincibilikisiwe), indawo enganamathele (ivimbela i-creepage), i-anti-creep (i-fiberglass reinforcement vs. μ-fiberglass reinforcement vs. Isilinganiso somlilo we-V-0. Uma kuqhathaniswa ne-mica, irabha, nama-gaskets e-PTFE ahlanzekile, indwangu ye-PTFE inikeza ukuguquguquka okuphakeme, ukucutshungulwa, nokuzinza kobukhulu besikhathi eside. Ilungele ama-transformer, ukufakwa kwezimoto, ukuvala uphawu kwamakhemikhali, kanye nemishini ye-semiconductor.

Intengo ye-emulsion ye-PTFE ithonywa izici kulo lonke uchungechunge lwezimboni. Izindleko ezikhuphuka nomfula (izimayini ze-fluorite, izabelo zesiqandisi ezingama-R22) zibeka inani eliphansi lentengo. Ukufunwa phansi komfula kusuka kuzibophezelo zebhethri le-lithium umshayeli oyinhloko wokukhula. Izinto ezinikezwayo (amazinga okusebenza embonini, ukunakekelwa kwezitshalo) kanye nekhwalithi yomkhiqizo (okuqukethwe okuqinile, usayizi wezinhlayiyana, izinga lokuhlanzeka) kudala izilinganiso zamanani. Imithethonqubo yezemvelo (imikhawulo ye-PFOA/PFAS) inyusa izindleko zokuthobela. Izinto zokuthutha (i-cold chain transport) zengeza izindleko ezinkulu. Izitayela zamanani zilandela ingqondo ewumgogodla: izindleko ze-fluorite/hydrofluoric acid = phansi; isidingo sebhethri lamandla amasha = isiqondiso sokuhamba; amazinga okusebenza nezinqubomgomo = izibangeli zokuntengantenga kwesikhashana.

Itheyiphu ye-PTFE yepayipi lamakhemikhali/isitsha sokunqanda ukugqwala, ukungagxili, nokuvikelwa kokuvala kudinga i-substrate ehambisanayo, isistimu yokunamathela, kanye nemidiya yamakhemikhali. I-Silicone PSA inconywa ku-200-260 ° C ngama-acids / alkali; I-acrylic PSA imelana nezinyibilikisi eziphilayo kodwa ikhawulela izinga lokushisa libe ngu-≤150°C. Ku-HF, ukubilisa >80% alkali, noma i-chlorine trifluoride, sebenzisa i-PTFE-only lining (akukho okunamathelayo okuphilayo). Okubalulekile: i-adhesive iyisixhumanisi esibuthakathaka, hhayi i-PTFE ngokwayo.

I-PTFE indwangu flatness ngesikhathi sintering kudinga ukushuba, izinga lokushisa, nokulawula ukuzibamba. Izindlela eziyinhloko: umshini we-stenter (amapuleti amaphini agcina ububanzi, avimbele ukushwabana kwe-weft), iphrofayili yezinga lokushisa eliphansi (ukushisa kancane → 380-400°C bamba → ukupholisa kancane ngaphansi kuka-310°C ngaphambi kokukhulula ukushuba), i-substrate eshwabene ngaphambili (isusa ukucindezeleka kokuluka ngaphambi kokumboza), kanye nogqinsi lokweluka okufanayo (ukuvimbela ukuncibilika kokuhlukana). Ukuvimbela okuqinile kufanele kugcinwe kuze kuphole ngaphansi kwephoyinti le-PTFE lokucwebezela (okungaba ngu-310°C) ukuze kuvinjelwe i-warpage.

Ukugqoka okufanayo ngesikhathi se-PTFE emulsion impregnation yendwangu ye-fiberglass iyindlela yokuphila yekhwalithi yomkhiqizo. Izimbangela zokwemboza ngokungalingani: ukwehluleka okungeyona intonga (ukunamathela ezindaweni ezizacile), ubuthakathaka bemishini (ukugxiliswa kwengcindezi, ukudabuka), ukungazinzi kukagesi (i-voltage ehlukanayo yehla ibe ngu-1/10), ukungena kwamakhemikhali (ukugqwala kwephinifa), izinkinga zobukhulu (i-warpage), 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.

Amandla okubamba itheyiphu ye-PTFE athuthukiswa ngokugcotshwa kanye nokwenza ngcono inqubo yokwelapha. I-Coating: ungqimba lwe-primer (0.5-2μm silane primer ivimbela ukuxebuka kwe-adhesive), ukujiya kwe-adhesive 30-60μm (okulungele ukubamba amandla), i-vacuum defoaming, kanye nokuhlunga okungu-5-10μm. Ukwelapha: Ukushisa okuhamba kancane (80-100°C ukususwa kwe-solvent → 120-140°C shape → 150-220°C deep crosslinking), post-curing (40-60°C for 24-48h ukuze uphumuze ingcindezi), kanye nokudluliswa kwe-tension ephansi ukuvimbela ukucindezeleka kwangaphakathi ekuncipheni kwe-substrate. I-primer ibalulekile kumandla aphansi we-PTFE.

Indwangu ye-PTFE enezinga eliphezulu lokushisa idlula ezigabeni ezine zoshintsho lwesakhiwo njengoba izinga lokushisa likhuphuka: ngaphansi kuka-260°C – ukuqhekeka okuncane okunensayo kanye nokuguquguquka okungeziwe okusele; ku-327 ° C (iphuzu elincibilikayo) - inguquko ye-crystalline-to-amorphous, i-coating iyathambisa, i-delaminates kusuka ku-fiberglass; 400-500°C - PTFE depolymerizes (ikhulula amagesi anobuthi), ukunamathela kuyanyamalala; ngaphezu kuka-500 ° C - i-fiberglass iyathamba (iphoyinti lokuthambisa elingu-840 ° C) futhi ilahlekelwa ubuqotho besakhiwo. Hlala ngaphansi kuka-260°C ngokuqhubekayo, gwema >300°C iziqongo ukuze usebenze ngokuphephile.

Indwangu ye-PTFE enezinga lokushisa eliphezulu ikhiqizwa ngokufakwa kokucwiliswa okukodwa (iphasi eyodwa: esheshayo, eshibhile, enamathelayo emincane, indawo emagebhugebhu enezimbobo zokucwilisa) noma ukucwiliswa kokucwiliswa okuningi (amaphasi angu-2-3+: okubushelelezi, okuminyene, okungenayo iphinifa, okuqukethwe kwe-PTFE 50-70%, ukusebenza kwe-premium, izindleko eziphezulu). I-Single-dip ifanela ama-gasket ebanga eliphansi, omati besikhashana, nezinto eziphefumulayo. I-Multi-dip iyadingeka kumashidi okubhaka ebanga lokudla, amabhande okuthutha angagxili, ama-substrates esekethe yamagagasi aphezulu, amalayini amakhemikhali, nolwelwesi lwezakhiwo.

I-PTFE yokwelashwa kwendawo enezinga lokushisa eliphezulu yendwangu yephula ukungangeni kwamakhemikhali ukuze kuhlanganiswe/ukuphrinte. Izindlela ezine: ukufakwa kwamakhemikhali (i-sodium-naphthalene, amandla angaphezulu 20→ 40-50 dyn/cm, ungqimba olumnyama oluhlala njalo, isakhiwo se-micro-porous), ukwelashwa kwe-plasma (i-nano-roughening, ukuxhunyelelwa kweqembu elisebenzayo, iwindi elifushane elisebenzayo), ukwelashwa kwe-corona (ifilimu elincanyana, ukubola okusheshayo, ukujula okulinganiselwe), kanye nokwelashwa kwe-laser (ukunemba kwe-micro-patterning, ukulawulwa kwe-carbonization). Zonke izindlela zenza zibe rough ngokomzimba futhi zethule amaqembu asezindaweni ezishisayo ngamakhemikhali (C=O, -OH, -COOH) ukuze kusebenze ukunamathela kokunamathelayo.