PTFE maro heerkul sare ah ayaa lagu 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 qaade 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, tallaalka 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 (bilowga haraaga ah, surfactants, ions birta, walxaha wasakhaysan) waxay sababaan hoos u dhaca kulaylka (xumo, finan ka sarreeya 260°C), sagxadaha aan sinnayn ee aan dhegta lahayn (dhibcaha ku dheggan), korantada korantada oo hoos u dhacda (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 xaqiijiyo 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-celisa inta aad gacanta ku hayso.

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 oo degdeg ah (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, ka fogow xiisadda heerkulka kala-guurka, adeegso kiciyayaal toos ah suumanka qaadaha, oo mari nakhshad is-kordhinta 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 oo si nadiif ah loo sii daayo), heerkulka ballaaran (-70 ° C ilaa 260 ° C, ammaan ah foornada ilaa qaboojiyaha), dib-u-isticmaalka (kumanaan wareegyo, fududahay in la 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.

Dharka heerkulka sare ee PTFE ayaa lagama maarmaan u ah warshadaha isku dhafka dharka. Codsiyada muhiimka ah: suumanka gudbinta aan dhamaadka lahayn ee mashiinada fusing joogtada ah (waxay ka hortagtaa dhejinta dhalaalaysa kulul, gudbinta laalaab la'aanta), daboolka aan dhegta lahayn iyo marada suufka ah ee kulaylka fidsan (waxay ka ilaalisaa platens ka wasakhaynta xabagta), suunka gudbinta ee koollada dhibcaha / xadhkaha budada (waxay ilaalisaa xabagta xabagta / dhejinta ee kabaha) inta lagu jiro dhibcooyinka birta ee qalalan. Dhumucdiisuna waxay u dhaxaysaa 0.13mm (suunka khafiifka ah) ilaa 0.55mm (suunka qaadaha culayska leh).

Dharka PTFE-ga ka-hortagga ah waxaa lagu gaaraa laba hab oo waaweyn: dahaarka doping (isku-darka buuxinta dareeraha sida kaarboonka madow ee emulsion PTFE, samaynta shabakad percolation ah oo diiradda saaraya) iyo tolidda substrate (ku dhejinta fiilooyinka korantada ee maro fiberglass ah). Iska caabbinta dusha sare waxaa lagu xakameynayaa 10⁵-10⁹ Ω. Mabda'a: samee dariiq toosan oo miiraya kharashyada taagan isla markaaba, ka hortagaya isu-ururinta khatarta ah. Dhul-dhigiddu waa waajib shaqo wax ku ool ah.

Dharka heerkulku sareeyo ee PTFE (Fiberglass PTFE-dahaarka leh) waxay bixisaa iska caabin kiimiko oo gaar ah, adkeysi asiidh uruursan (ay ku jirto aqua regia), alkalis xoog leh (heerkulka qolka), dareerayaasha organic, iyo wakiilada oksaydhka. Waxa ka reebban: biraha alkali ee dhalaalay iyo xeryahooda heerkulka sare ee halogen waxay weeraraan PTFE. Waxyeellada dahaarka waxay u soo bandhigtaa fiberglasska hydrofluoric acid iyo alkalis diirran oo kulul. Heerkulka ka sarreeya 260 ° C wuxuu yareeyaa caabbinta. Inta badan bay'ada kiimikada, dharka PTFE ayaa weli ah mid deggan oo la isku halayn karo.