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 muujisa firfircooni la'aan kiimikaad gaar ah, iska caabin 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, carbon tetras organic). (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 xoog leh, waxqabad aad u fiican oo aan dhejis ahayn, 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 dunta, qalajinta warqad/filim); 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 PTFE, abuurista godad godad ah, 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 dahaaran 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 aan 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 walbahaarka dharka ka hor daboolka), 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.

Isku-duubnida dahaarka inta lagu jiro impregnation emulsion PTFE ee marada fiberglass waa khadka nolosha ee tayada badeecada. Daahan aan sinnayn ayaa sababa: guuldarada aan dhegta lahayn (ku dheggan dhibco dhuuban), daciifnimo farsamo (fiirsashada culayska, jeexjeexa), xasiloonidarada korantada (korontadu waxay hoos u dhacdaa 1/10), dhexgalka kiimikaad (daxalka pinhole), arrimaha cabbirka (warpage), iyo cilladaha farsamaynta (wareejinta suunka, kala duwanaanta dhumucda). Daahan labbiska ah wuxuu u baahan yahay kontoroolka saxda ah ee viscosity emulsion, nuxurka adag, xiisadda dharka, tuujin daldaloolada, iyo astaanta qalajinta/qallajinta aaga badan.

PTFE maro heerkulkeedu sarreeyo waxay martaa afar marxaladood oo isbeddel qaabdhismeed ah marka heerkulku kor u kaco: ka hooseeya 260 ° C - yar-dillaac gaabis ah iyo isbeddel wax lagu daro oo hadh ah; at 327 ° C (dhibcaha dhalaalay) - kala-guurka crystalline-to-amorphous, daahan ayaa jilicsan, delaminates ka fiberglass; 400-500 ° C - PTFE depolymerizes (waxay sii deysaa gaasaska sunta ah), daboolka ayaa lumaya; ka sarreeya 500°C – fiberglass-ku wuu jilciyaa (840°C barta jilicsan) oo luminaysa sharafta qaabdhismeedka. Joog heerkulkiisu hooseeyo 260°C si joogto ah, iska ilaali>300°C meelaha ugu saraysa ee qalliin badbaado leh.