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 koloba hantle; 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 akaretsa matšoao a mantlha a ts'ebetso bakeng sa tepi ea PTFE ea mocheso o phahameng o sebelisoang ho koahela vacuum, kalafo ea mocheso oa vacuum le libaka tse tšoanang. Litlhoko tsa bohlokoa li fapane haholo le ts'ebeliso ea sepakapaka: ho tsoa mali ho bohlokoa haholo (TML≤1%, CVCM≤0.1%; limaraka tsa sefofane / optical li hloka TML≤0.5%, CVCM≤0.01%); ho hanyetsa mocheso ho tlameha ho netefatsoa bakeng sa bobeli ba PTFE substrate (260 ° C) le lera la sekhomaretsi; PSA ea silicone e hloekisitsoeng ka ho khetheha e hlokahalang ho thibela tšilafalo ea siloxane; matla a ho tšoara mocheso o phahameng a thibela ho qhoma le ho phahamisa bohale; bohloeki ha bo hloke ho tšolloa ha fiber le li-ionic tse fokolang; tepi e khahlanong le static (ka holim'a resistivity 10⁶-10⁹ Ω / sq) e thibela tšenyo ea ESD; khanyetso ea plasma e tlameha ho hlahlojoa bakeng sa lits'ebetso tsa sputtering/PECVD; shrinkage ea mocheso ka tlase ho 2% e netefatsa ho nepahala ha masking.

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 lihlapolli 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: joala (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 liaparo tse thata, tse brittle tse atisang ho fokotseha, ho peeling le microcracks.

Sehlooho sena se bapisa mocheso oa kamore le mocheso o phahameng oa sekhomaretsi se nang le khatello ea silicone bakeng sa tepi ea PTFE. Boemo bo phahameng ba mocheso (120-180 ° C) bo etsa marang-rang a teteaneng a kopantsoeng a nang le matla a matla a ho kopanya, a thibela masala a sekhomaretsi ka mor'a ho ebola. E theha litlamo tsa lik'hemik'hale tse nang le lik'hemik'hale tse nang le li-substrates tsa PTFE ka primer co-curing, ho felisa likotsi tsa delamination. Ho hōla ha mocheso o phahameng ho boetse ho tlosa li-volatile tsa limolek'hule tse tlaase pele ho tsoaloa, ho thibela ho phatloha le ho silafala ha oli ea silicone nakong ea ho futhumatsa ha pele.

Tataiso ena e akaretsa khetho ea theipi ea mocheso o phahameng oa PTFE bakeng sa ho bopa ha ente le lits'ebetso tse khahlanong le lithupa. Khetho e thehiloeng mocheso: ≤260 ° C bakeng sa polasetiki e tloaelehileng (tape e tloaelehileng ea silicone PSA, 0.13-0.18mm); 260-300 ° C bakeng sa li-plastiki tsa boenjiniere tse phahameng tsa mocheso joaloka PC, PA66, POM (sekhomaretsi sa silicone se phahameng, 0.18-0.25mm); 300-400 ° C bakeng sa PEEK, LCP, PPS haufi le libapali tse chesang (theipi e khomarelang e hlōleha; sebelisa lesela la PTFE le se nang sekhomaretsi kapa filimi ea PFA). Khetho e thehiloeng ho lintho tse bonahalang: thepa ea tacky e hloka libaka tse phahameng tsa PTFE tse hloekileng; lisebelisoa tse tlatsitsoeng ka khalase / liminerale li hloka tepi e sa sebetseng ea boima ba 0.25mm +; li-additives tse senyang li hloka sekhomaretsi se hanyetsanang le lik'hemik'hale le substrate e teteaneng; static-sensitive applications hloka anti-static black PTFE theipi.

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 ho khohlakana ho 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 e qhibiliha ka holimo ho 327 ° C, e senya lamellae ea pele e phuthoang le likaroloana ho etsa 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.

Lesela la fiberglass le koahetsoeng ka PTFE le sebelisoa haholo ts'ebetsong ea rabara bakeng sa ho hanyetsa mocheso, thepa e sa thupeng le khohlano e tlase. Lisebelisoa tsa bohlokoa li kenyelletsa: li-liner tsa ho lokolla bakeng sa ho phunya poleiti / vacuum le ho etsa mabili; mabanta a conveyor a sa thupeng bakeng sa tshilo e butsweng, di-calender le mehala ya ho phodisa; lesela la interleave bakeng sa polokelo ea rabara e felileng; ts'ebetso e khethehileng ea silicone le fluororubber; le literei tsa ontong bakeng sa ho phekoa. Melemo e kenyelletsa ho felisa ho khomarela hlobo, ho fokotsa tšebeliso ea moemeli oa tokollo, ho thibela ho phuthela ha lirolara, le ho etsa bonnete ba hore e theohile hantle.

Li-sintering tse tlaase li siea PTFE e sa qhibiliha, e bakang li-micro-pores, ho khomarela ho fokolang, libaka tse thata, matla a tlaase a mochine le ponahalo ea lebese. Mocheso o feteletseng o theola boemo ba PTFE, o hlahisa masoba, lipululana, maqheka, 'mala o mosehla ho ea ho o motšo, le mosi o chefo. Ka bobeli li senya compactness, ts'ebetso e se nang thupa, ho tenyetseha, ho kenya letsoho, le botsitso ba sebopeho. Boemo bo nepahetseng ba 370-400°C bo fana ka mokhabiso o hlakileng, o boreleli, o mosehla. Tlhahlobo ea pono: matte white = under-sintered; mosehla/brittle = over-sintered. (296 litlhaku)