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.

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 (fiiri 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 heerkul sare ah waxay maraysaa 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 jilcisa, 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. Ka hooseyso 260°C si joogto ah, ka fogow>300°C meelaha ugu saraysa si aad u hesho hawlgal badbaado leh.

PTFE maro heerkul sare ah ayaa la soo saaraa iyada oo loo marayo impregnation-kaliya mid ka mid ah (hal baas: degdeg ah, qiimo jaban, daahan khafiif ah, dusha qallafsan oo leh godad pinholes) ama impregnation multi-dip (2-3+ baasas: siman, cufan, daahan-free-hole-free, PTFE content 50-70%, waxqabadka premium, kharashka sare). Hal-maquufintu waxay ku habboon tahay gaasaska heerka hoose, dermaha ku meel gaadhka ah, iyo alaabta neefsashada. Isku-dubbarid badan ayaa looga baahan yahay xaashida dubista heerka-cunada, suumanka gudbinta ee aan dhegta lahayn, substrates wareegyada inta badan soo noqnoqda, xadhkaha kiimikaad, iyo xuubabka dhismaha.

PTFE daawaynta maro heerkul sare leh waxay jebisaa firfircoonaanta kiimikada ee isku xidhka/daabacaadda. Afar hab: etching kiimikaad (sodium-naphthalene, tamarta dusha 20→40-50 dyn / cm, lakabka madow ee joogtada ah, qaab-dhismeedka micro-porous), daaweynta plasma (nano-roughening, grafting kooxda functional, daaqad firfircoon gaaban), daaweynta corona (filim khafiif ah, suus degdeg ah, qoto dheer oo xadidan), iyo daaweynta laser (micro-qaabaynta saxda ah, carbonization la xakameeyey). Dhammaan hababka jir ahaan way qallafsan yihiin oo kiimiko ahaan waxay soo bandhigaan kooxaha polar (C=O, -OH, -COOH) si ay awood ugu yeeshaan isku xidhka xabagta.

Nadiifinta alaabta ceeriin waa aasaaska aasaasiga ah ee tayada maro heerkul sare leh ee PTFE. Waxyaalaha wasakhda ah (bilaabayaasha haraaga ah, Surfactants, ions biraha, walxaha wasakhaysan) waxay sababaan hoos u dhaca kulaylka (xumo, finan ka sarreeya 260 ° C), sagxadaha aan sinnayn ee aan sinayn (dhibcaha ku dheggan), dahaarka korantada oo yaraada (luminta korontada, korantada burburka hoose), daciifinta xoogga farsamada (suuq-geynta). Alaabooyinka cayriin ee nadiifka ah ee sarreeya waxay xaqiijinayaan FDA-ku-dhaqanka, cimri-dheer, waxqabadka sare ee PTFE.

PTFE-dahaarka leh muraayadaha fiberglas-ka-soo-baxa waxay u baahan tahay waqti haynta saxda ah 370-400 ° C. Foornooyinka joogtada ah: 30-90s (dhuuban) ilaa 3-5+ daqiiqo (qararan). Foornooyinka Dufcada: 5-15 min. Hoos-u-dhigiddu waxay sababtaa dahaarka aan muuqan, qallafsan ee diirka; xad-dhaafka ah waxay sababtaa jaale, jajaban, iyo sii daynta gaasta fluoride ee sunta ah. Hagaajinta habka: isticmaal raadiyeyaasha heerkulka foornada, samee kormeer muuqaal ah (daah-furnaan, dabacsanaan), oo samee tijaabooyinka jiidista cajaladda. Had iyo jeer hubi isku mid ahaanshaha heerkulka dhumucda buuxda.

Dharka heerkulka sare ee PTFE wuxuu u baahan yahay in si taxadar leh loo maareeyo si loo hubiyo badbaadada iyo cimriga dheer. Taxadarrada muhiimka ah: waligaa ha dhaafin 260°C (ka sarreeya 320°C ayaa sii daaya qiiqa sunta ah), ka fogow dillaacyada fiiqan (daahan dildilaaca, soo bandhiga fiberglass), nadiifin la'aan (dhogor bir ah ayaa waxyeello u geysata dusha aan dhegta lahayn), kaydi nadiifinta kulaylka (waxay ka hortagtaa jeexjeexa), beddel marka ay finan ama diirto. Bakhaarku waa la duubay, oo ka fog UV. Xiro galoofyada kulaylka ka ilaaliya inta aad wax ka qabanayso.