Maqaalkani wuxuu bixiyaa hagitaan nidaamsan oo ku saabsan ka hortagga laalaabyada ee maro heerkul sare ah ee PTFE inta lagu jiro sintering. Laalaabku asal ahaan waxaa sababa kulaylka oo yaraada iyo walbahaarka aan joogtada ahayn. Xalku waxay daboolayaan qulqulka shaqada oo buuxa: xakamaynta substrate alaabta ceeriin (goob ka-saarid dhammaystiran / kuleyl si loo baabi'iyo walbahaarka gudaha); impregnation iyo qalajinta (daaha dhuuban oo badan, heerkul tartiib tartiib ah, rollers drive firfircoon); Xakamaynta foornada sintering (1-3% quudinta dheeraadka ah ee gunnada yaraynta kulaylka, kontoroolka-xakamaynta-yaraanta-xiran, isku-dhafka heerkulka beddelka ah ee gudaha ± 5 ° C, qalooca kuleylka preheating-sintering-qaloojinta, foornooyinka sabbaynta hawada sida xalka ugu fiican, rolalka fidsan fidsan); qaboojinta iyo dejinta (qabow tartiib tartiib tartiib tartiib ah, sii faafi faafinta ilaa ka hooseeya 100 ° C, qaboojin buuxda ka hor inta aan dabaylo); la socodka khadka tooska ah oo leh kormeer iftiin xoog leh iyo iskaanka infrared.

Maqaalkani waxa uu falanqeynayaa sida ciid-qarxinta ama daaweynta dhamaystirka matt ay u saamayso qaabka dusha sare ee PTFE maro heerkul sare ah. Isbeddellada waxay ku dhacaan saddex cabbir: Moofoloji-yar oo isku beddesha muraayad siman-sida oo u ekaanaysa qaab-dhismeed qallafsan oo leh qiyamka Ra/Rz oo aad u kordhay, abuurista qaab-dhismeedyo farsamo oo 3D ah oo loogu talagalay isku-xidhka xiga. Daacadnimada hufnaanta waxay wajaheysaa khataro: khafiifinta lakabka PTFE, soo bandhigida suurtagalka ah ee substrate fiberglass (sababta luminta hantida aan dhegta lahayn, dhex galka qoyaanka, iyo hoos u dhigida xoogga makaanikada), oo lagu daray microcracks iyo jiilka qashinka.

Maqaalkani wuxuu soo bandhigayaa habka aasaasiga ah ee dhammaystiran ee loogu talagalay dhejinta dharka fiberglass leh emulsion PTFE. Todoba tillaabo oo muhiim ah: ① Pretreatment (wax-ka-saarid/qurxineed) at 350-400°C si meesha looga saaro walxaha cabbirka dharka; ② Samaynta Emulsion oo leh 40-55% maaddo adag iyo wax-soo-saareyaal si loo hagaajiyo qoynta; ③ Uurka oo loo maro habka maroojinta ama dahaarka daabka dhakhtarka; ④ Ku qallajinta 100-150 ° C si aad si tartiib ah u uumibaxdo biyaha oo aad u sameyso filim qallalan PTFE; ⑤ Isku-dubbarididda 360-390 ° C (ilaa 400 ° C) si aad u dhalaaliso qaybaha PTFE filim joogto ah; ⑥ Imow-qallajin-wareegyo badan oo wareeg ah oo soo noqnoqda 2-4 jeer si loo gaaro dhumucda bartilmaameedka iyo nuxurka resin (45-65%); ⑦ Daawaynta ka dib oo ay ku jiraan daawaynta korona, gooynta geesaha, dabaylaha iyo hubinta tayada. Qodobbada xakamaynta xudunta u ah: dewaxing dhammaystiran, qoynta emulsion oo buuxa, qallajin tartiib tartiib ah, heerkul saxan oo sax ah, iyo cufnaanta dahaarka joogtada ah. Alaabooyinku waxay u adeegaan laminates-ka-koobeedka naxaasta ah, suumanka qaada heerkulka sare iyo alaabta xuubabka dhismaha.

Maqaalkani wuxuu soo bandhigayaa dareerayaasha organic ee PTFE maro heerkul sare ah ay u adkeysan karto. Maro fiberglass-ku dahaaran oo PTFE ah ayaa soo bandhigta firfircooni la'aan kiimikaad oo gaar ah, iska caabbinta ku dhawaad ​​dhammaan dareerayaasha organic caadiga ah ee hoos yimaada xaaladaha shaqada caadiga ah iyada oo aan la milmin, barar ama falcelin kiimikaad. Qaybaha loo dulqaadan karo waxaa ka mid ah: aalkolada (methanol, ethanol, isopropanol), ketones (acetone, MEK, cyclohexanone), esters (ethyl acetate, butyl acetate), hydrocarbons (gaaska, toluene, xylene, hexane), hydrocarbons halogenated (dichloromethane, chloroformyl ethers organic, carbon tetras acid). (glacial acetic acid, formic acid), amines iyo amides (triethylamine, DMF), phenols, iyo kuwa kale sida carbon disulfide, pyridine, saliid silikoon iyo dareere brake.

Maqaalkani waxa uu daboolayaa shuruudaha qaboojinta inta lagu jiro PTFE-ku-kululka sare ee maro sintering. Ka dib marka la gooyo 380-400 ° C, dharku waa inuu si degdeg ah u dhex maraa 310-315 ° C aagga xasaasiga ah. Heerka qaboojinta lagu taliyay waa ugu yaraan 30-50C/daqiiqo (maro khafiif ah waxay gaari kartaa 100-200 ° C/daqiiqo iyada oo loo marayo qaboojinta hawada). Qaboojinta degdega ah (dejinta) waxay soo saartaa crystallinity hooseeya (45-50%), soo saara jilicsan, dahaar adag oo leh sagxad siman, dhejis adag, waxqabad aan dhejisnayn oo aad u fiican, iyo caabbinta delamination iyo dildilaaca. Qaboojinta qunyar socodka ah (qaboojinta foornada) waxay keentaa crystallinity sare (60-70%), taasoo keenaysa dahaar adag, jajaban oo u nugul yaraanshaha, diirka iyo microcracks.

Maro heerkul sare leh oo PTFE ah oo cufan ayaa lagu sameeyaa iyadoo lagu dahaadhay PTFE oo ku dul dhejinaysa dhar fiberglass ah oo aad u sarreeya, oo bixisa xoogga adkaysiga, iska caabbinta kulaylka, guryaha aan dhegta lahayn, caabbinta kiimikada, iyo khilaaf hooseeya. Codsiyada muhiimka ah waxaa ka mid ah: gudbinta warshadaha (baakadaha kulaylka yareeya, dubista cuntada, qalajiyaha dharka, xaashida/filida qalajinta); maro lagu sii daayo oo wax ka samaysan oo isku dhafan iyo maro kulul oo saxaafadeed oo kulul; alxanka daahyada ilaalinta iyo jaakadaha kuleylka kuleylka; mootada korantada iyo dahaarka transformer; dhisidda biraha silbanaya iyo taageerada dhuumaha; sifaynta kiimikaad iyo xidhidhiyaha valve ee meelaha daxalka leh. Awooda xajinta sare waxay hubisaa cimri dhererka xiisadda, jeexjeexa, dabacsanaanta soo noqnoqda, iyo heerkulka heerkulka sare ee codsiyadan kala duwan ee waajibaadka culus.

Inta lagu guda jiro sintering, Qurub PTFE on marada fiberglass dhalaali in ka sarreeya 327 ° C, baabbi'in asalka laalaabka laalaa silsilad iyo xuduudaha qayb si ay u sameeyaan dhalaal amorphous ah. Marka la qaboojiyo, PTFE waxay dib u qaabaynaysaa spherulites ka kooban shucaac ku jihaysan lamellae, oo leh crystallinity u dhaxaysa 50-70%. Heerka qaboojinta ayaa go'aamisa kaamilnimada crystal: qaboojinta tartiib tartiib ah waxay soo saartaa crystallinity sare, spherulites waaweyn, qallafsanaan weyn; Deminta degdega ah waxay siinaysaa spherulites fican iyo dabacsanaan soo hagaagtay.

Farsamadan kooban ee ka socota Jiangsu Aokai waxay falanqaynaysaa sida xad-dhaafka ah ee hooseeya ama heerkulka sintering sare ay u waxyeeleeyaan PTFE maro heerkul sare ah. Diidmada hoose waxay ka tagtaa qaybo aan dhalaalin, taasoo keenta daldalool yar, isku xidhka substrate-ka daahan daciifka ah, sagxadaha qallafsan, xoog makaanik liidata, iyo muuqaal muuqaal caano ah. Kulaylku wuxuu keenaa hoos u dhaca kulaylka ee PTFE, abuurista godad godad leh, goobooyin, jajabnaan, midab huruud ilaa madow, iyo sii daynta qiiqa sunta ah. Labada darafba waxay burburiyaan isafgaradka, waxqabadka aan dhegta lahayn, dabacsanaanta, dahaarka, iyo xasilloonida cabbirka.

PTFE heerkul sare maro insulating gaskets isku daraa xoogga dielectric sare (degan hoos qoyaan ka hooseeya), -70 ° C in 260 ° C kala duwan heerkulka, caabbinta kiimikada caalamiga ah (marka laga reebo dhalaalid biraha alkali), dusha non-stick (ka hortagtaa gurguurta), anti- gurguurta (Xoojinta fiberglass vs. PTFE saafi ah), xoog adkaysi sare = 0 - 0 f). qiimeynta. Marka la barbar dhigo mica, caag, iyo gaasaska PTFE saafi ah, marada PTFE waxay bixisaa dabacsanaan sare, hawlkarnimo, iyo xasilloonida cabbirka muddada-dheer. Ku habboon transformers, dahaarka mootada, xidhitaanka flange kiimikaad, iyo qalabka semiconductor.

Fiicnaanta maro PTFE inta lagu guda jiro sintering waxay u baahan tahay xiisad sax ah, heerkulka, iyo xakamaynta xakamaynta. Hababka muhiimka ah: Mashiinka stenter (taarikada biinanka ah waxay ilaalinayaan ballaca, waxay ka hortagaan yaraynta weft), profile heerkulka gradient (kuleyl tartiib tartiib ah → 380-400 ° C qaboojin → qaboojin gaabis ah oo ka hooseeya 310 ° C ka hor inta aan la sii deyn), substrate-ka hore (waxay ka saartaa diiqada dharka ka hor daahan), iyo dhumucda dahaarka lebbiska (waxay ka hortagtaa dhalaalid kala duwan). Xannibaadda steetarka waa in lagu hayaa ilaa ay ka hoos qaboojinayso barta kirismaska ​​PTFE (qiyaastii 310°C) si looga hortago dagaal.