Sengoliloeng sena se hlahisa ts'ebetso e felletseng ea ho kenya lesela la fiberglass ka emulsion ea PTFE. Mehato e supileng ea bohlokoa: ① Pretreatment (dewaxing/desizing) ka 350-400°C ho tlosa lisebelisoa tsa boholo ba masela; ② Tlhahiso ea emulsion e nang le 40-55% e tiileng le li-surfactants bakeng sa ho kolobisa ho ntlafetseng; ③ Ho ima ka mokhoa oa dip-squeeze kapa ho roala ka lehare la ngaka; ④ Ho omisa ho 100-150 ° C ho fetola metsi ka bonolo 'me u thehe filimi e omileng ea PTFE; ⑤ Sintering ho 360-390 ° C (ho fihlela ho 400 ° C) ho qhibilihisa likaroloana tsa PTFE ka filimi e tsoelang pele; ⑥ Multi-cycle impregnation-drying-sintering e pheta-pheta makhetlo a 2-4 ho fihlela botenya ba sepheo le lihlahisoa tsa resin (45-65%); ⑦ Kalafo ea morao-rao e kenyeletsang phekolo ea corona, ho fokotsa moeli, ho koala le ho hlahloba boleng. Lintlha tsa taolo ea mantlha: dewaxing e felletseng, ho kolobisa ka botlalo emulsion, ho omisa butle-butle, mocheso o nepahetseng oa sintering, le letsoalo le sa fetoheng la ho roala. Lihlahisoa li fana ka li-laminate tsa koporo tse nang le maqhubu a phahameng, mabanta a conveyor a mocheso o phahameng le lisebelisoa tsa meralo ea meralo.

Sengoliloeng sena se hlahisa li-solvents tsa organic tseo lesela la mocheso o phahameng oa PTFE le ka mamellang. Lesela la fiberglass le koahetsoeng ke PTFE le bonts'a ho se sebetse ho ikhethang ha lik'hemik'hale, ho hanyetsa hoo e batlang e le lihlahisoa tsohle tse tloaelehileng tsa tlhaho tlas'a maemo a tloaelehileng a ho sebetsa ntle le ho qhibiliha, ho ruruha kapa karabelo ea lik'hemik'hale. Likarolo tse mamellehang li kenyelletsa: lino tse tahang (methanol, ethanol, isopropanol), ketone (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (peterole, toluene, xylene, hexane), halogenated hydrocarbons (dichloromethane, carboniclodethyl, tether). THF), organic acids (glacial acetic acid, formic acid), amines le amides (triethylamine, DMF), phenols, le tse ling tse kang carbon disulfide, pyridine, silicone oli le brake fluid.

Sengoliloeng sena se akaretsa litlhoko tsa sekhahla sa ho pholisa nakong ea PTFE ea mocheso o phahameng oa mocheso oa lesela. Kamora ho chesa ka 380-400 ° C, lesela le tlameha ho feta ka potlako sebakeng sa 310-315 ° C sa crystallization-sensitive zone. Sekhahla sa ho pholisa se khothalelitsoeng ke bonyane 30-50 ° C / min (lesela le lesesaane le ka fihlela 100-200 ° C / min ka moea o pholileng). Ho pholile ka potlako (ho tima) ho hlahisa crystallinity e tlaase (45-50%), ho fana ka liphahlo tse bonolo, tse thata tse nang le libaka tse boreleli, ho khomarela ka matla, ts'ebetso e babatsehang e sa tsitsang, le ho hanyetsa delamination le ho phunyeha. Ho pholile butle (ho pholile ha sebōpi) ho fella ka crystallinity e phahameng (60-70%), e bakang liphahlo tse thata, tse brittle tse atisang ho fokotseha, ho peeling le microcracks.

Lesela le nang le mocheso o phahameng oa PTFE le entsoe ka ho roala PTFE holim'a lesela la fiberglass e matla haholo, le fanang ka matla a tsitsitseng, ho hanyetsa mocheso, thepa e sa tsitsang, lik'hemik'hale tse hanyetsanang le likhohlano tse fokolang. Lisebelisoa tsa bohlokoa li kenyelletsa: ho tsamaisa liindasteri (ho paka ho fokotsa mocheso, ho baka lijo, li omisa masela, ho omisa pampiri / lifilimi); lesela la ho lokolla le entsoeng ka motsoako le li-cushion liner tse chesang; tjheseletsa likharetene tse sireletsang le libaki tsa ho futhumatsa mocheso; motlakase oa motlakase le motlakase oa motlakase; ho haha ​​li-bearings tse thellang le litšehetso tsa lipeipi; ho sefa lik'hemik'hale le ho koala li-valve libakeng tse senyang. Matla a matla a phahameng a tiisa ho tšoarella tlas'a tsitsipano, ho taboha, ho feto-fetoha khafetsa, le khatello ea mocheso e phahameng ea mocheso ho pholletsa le mefuta ena e fapaneng ea mesebetsi e boima.

Nakong ea sintering, likaroloana tsa PTFE holim'a lesela la fiberglass le qhibiliha ka holimo ho 327 ° C, li senya lamellae ea pele e phuthoang le likaroloana ho etsa hore ho be le ho qhibiliha ha amorphous. Ka mor'a ho pholile, PTFE e tsosolosa li-spherulites tse entsoeng ka lamellae e nang le mahlaseli a maholo, a nang le crystallinity ho tloha 50-70%. Sekhahla sa ho pholisa se etsa qeto ea phetheho ea kristale: ho pholisa butle ho fana ka kristale e phahameng, li-spherulite tse kholoanyane, boima bo boholo; ho tima ka potlako ho fana ka li-spherulite tse ntle le ho feto-fetoha ha maemo.

Kakaretso ena ea tekheniki e tsoang ho Jiangsu Aokai e sekaseka kamoo mocheso o tlase haholo kapa o phahameng oa sintering o senyang lesela la mocheso o phahameng oa PTFE. Mahlaseli a tlaase a sintering a sa qhibiliha, 'me a baka li-micro-pores, li-coat-substrate bonding tse fokolang, libaka tse mahoashe, matla a fokolang a mochine, le ponahalo ea milky opaque. Ho futhumala ho feteletseng ho baka PTFE ho senyeha ha mocheso, ho hlahisa masoba, lipululana, brittleness, mosehla ho ea ho o motšo, le ho ntša mosi o chefo. Likarolo tsena ka bobeli li senya tšubuhlellano, ts'ebetso e se nang thupa, ho tenyetseha, ho kenya letsoho, le botsitso ba sebopeho.

PTFE high-themperature cloth insulating gaskets kopanya matla a dielectric a phahameng (a tsitsitseng tlas'a mongobo), -70 ° C ho 260 ° C mocheso oa mocheso, lik'hemik'hale tsa bokahohleng (ntle le litšepe tsa alkali tse qhibilihantsoeng), holim'a metsi a sa tsitsang (thibela creepage), anti-creep (fiberglass reinforcement vs. friction e tlaase μ5 = 0.0 . Tekanyo ea mollo ea V-0. Ha ho bapisoa le mica, rabara, le li-gaskets tse hloekileng tsa PTFE, lesela la PTFE le fana ka maemo a holimo, a sebetsang hantle, le botsitso ba nako e telele. E loketse li-transformer, ho kenya motlakase, ho tiisa flange ea lik'hemik'hale, le lisebelisoa tsa semiconductor.

PTFE lesela flatness nakong sintering hloka e tobileng tsitsipano, mocheso, le taolo ya thibelo. Mekhoa ea mantlha: mochini oa stenter (lipoleiti tsa pin li boloka bophara, li thibela ho fokotseha ha weft), profil ea mocheso oa gradient (ho futhumala butle → 380-400 ° C tšoara → ho pholile butle ka tlase ho 310 ° C pele ho lokolla tsitsipano), substrate e senyehileng pele (e tlosa khatello ea ho loha pele e roaloa), le botenya ba ho roala junifomo (ho thibela ho qhibiliha ho fapaneng). Thibelo e tsitsitseng e tlameha ho bolokoa ho fihlela ho pholile ka tlase ho ntlha ea crystallization ea PTFE (hoo e ka bang 310 ° C) ho thibela ntoa.

Ho apara ho tšoana nakong ea PTFE emulsion impregnation ea lesela la fiberglass ke mokhoa oa bophelo oa boleng ba sehlahisoa. Lisosa tse sa tšoaneng tsa ho roala: ho hlōleha ha lithupa (ho khomarela libakeng tse tšesaane), bofokoli ba mochine (khatello ea maikutlo, ho taboha), ho se tsitse ha motlakase (ho theoha ha motlakase ho ea ho 1/10), ho kenella ka lik'hemik'hale (pinhole corrosion), litaba tsa dimensional (warpage), le liphoso tsa ho sebetsa (ho lelera ka lebanta, ho fetoha ha botenya). Ho roala ka mokhoa o ts'oanang ho hloka taolo e nepahetseng ea viscosity ea emulsion, dikahare tse tiileng, tsitsipano ea masela, likheo tse petetsang, le li-profiles tsa multi-zone drying / sintering.

Lesela la mocheso o phahameng oa PTFE le kena ka mekhahlelo e mene ea phetoho ea mohaho ha mocheso o ntse o phahama: ka tlase ho 260 ° C - butle-butle ho phunyeha ha micro-cracking le ho salla ho eketsa matla; ka 327 ° C (sebaka sa ho qhibiliha) - phetoho ea crystalline-to-amorphous, ho roala ho kokobetsa, ho senya ho tloha fiberglass; 400-500 ° C - PTFE depolymerizes (e lokolla likhase tse chefo), ho roala hoa nyamela; ka holimo ho 500 ° C - fiberglass e nolofatsa (840 ° C e nolofatsa ntlha) mme e lahleheloa ke botšepehi ba sebopeho. Lula ka tlase ho 260°C kamehla, qoba >300°C tlhoro bakeng sa ts'ebetso e sireletsehileng.