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. Joog heerkulkiisu hooseeyo 260°C si joogto ah, iska ilaali>300°C meelaha ugu saraysa ee qalliin badbaado leh.

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.

Dharka heerkulku sareeyo ee PTFE waxa uu leeyahay iskudar balaadhinta kulaylka (CTE) ee 30-60 ppm/°C (warp/weft) – ka sarreeya fiberglass kaligii laakiin aad uga hooseeya PTFE saafi ah (100-200 ppm/°C). PTFE waxa lagu sameeyaa isbeddello mug leh (1-2%) marka la gaadho 19°C iyo 30°C marxaladda kala-guurka. Si looga fogaado jeexjeexa, jeexjeexa, iyo kala saarista: nadiifinta naqshadaynta ballaarinta bilaashka ah, iska ilaali xiisadda heerkulka kala-guurka marxaladda, adeegso kiciyayaal toos ah suumanka qaadaha, oo codso nashqada isku dhafka ah ee ka-hortagga. Kormeer joogto ah ee socodka qabowgu waa lama huraan.

PTFE sariiraha dubista heerkulka sare ee dharka ayaa bixiya afar faa'iidooyin oo muhiim ah: waxqabadka aan dhejin (saliid ama bur looma baahna, macmacaan jilicsan si nadiif ah loo sii daayo), heerkulka ballaaran (-70 ° C ilaa 260 ° C, ammaan ah foornada ilaa qaboojiyaha), dib-u-isticmaalka (kumanaan wareegyo, si sahlan loo nadiifiyo), iyo xitaa kuleylka kuleylka (waxay ka hortagtaa gubasho, browning dheelitiran). U hoggaansanaanta heerka cuntada ee FDA, waxay ka sarreeyaan warqadda xaashida waxayna ka sarreeyaan sariiraha silikoon ee wareejinta kulaylka wanaagsan iyo muuqaalka kore ee wanaagsan.