Maro fidsan oo fidsan (dharka dunta badan) waxay asal ahaan kaga duwan tahay maro fiberglass-ka caadiga ah ee qaab dhismeedka dunta. Iyada oo loo marayo daawaynta hawada cadaadiska sare leh, fiilooyinka muraayadaha ee joogtada ah waa la kala soocaa, waa la curyaamiyey, waxaana loo rogay dunta mugga leh, sida suufka oo kale ah. Tani waxay abuurtaa dhar ka sii dhumuc weyn, jilicsan oo leh dahaarka kulaylka sare (lakabyada hawada xayiran), waafajinta wanaagsan, waxtarka sifaynta sare, iyo jeexjeexa iska caabbinta oo la wanaajiyey - iyadoo qiimaha xoogga xajinta uu yara hooseeyo. Loo isticmaalo gaasaska heerkulka sare leh, duubabka tuubooyinka, bacaha shaandhada, iyo xirmooyinka foornada.

Nadiifinta alaabta ceeriin waa aasaaska waxqabadka dharka heerkulka sare ee PTFE. Emulsion PTFE nadiif ah oo nadiif ah (aan lahayn ions bir ah, ma jiraan hadhaaga miisaanka-molecular-hooseeya) waxay hubisaa iska caabbinta kulaylka (wax jaale ah ilaa 260 ° C), dhejis aan dhejis ahayn, iyo xoog koronto oo sarreeya. Fiberglass, E-glass-free alkali-free (Na₂O <0.8%) waxa uu ilaaliyaa xoogga iyo dahaarka heerkulka sare; Dhalada dhexdhexaadka ah/alkali-sare waxay keentaa hoos u dhac. Si dhammaystiran u saarista wakiilada cabbirka tolida waxay ka hortagtaa kaarboonaysiinta iyo delamination. Nadiifintu waxay si toos ah u saamaysaa nolosha adeegga, u hoggaansanaanta heerka-cuntada, iyo isku hallaynta korantada.

Qalajinta saxda ah ee ka samaysan fiberglass-ka ayaa muhiim u ah daahan PTFE ee xiga, resin impregnation, ama lamination. Saddex daweyn oo waaweyn: qoyaan ka saarista 105-120 ° C (10-30 min iyadoo ku xiran culeyska), nadiifinta / kulaylka nadiifinta 300-450 ° C (LOI <0.1%, ka fogow> 500 ° C), iyo kuleyliyaha 60-100 ° C ka hor inta aan la daboolin. Xakamee lebiska heerkulka foornada (± 5°C), qoyaanka qasabka ah, oo ilaali dharka silane-la daweeyay ee ka hooseeya 110°C. Ku kaydi dharka qallalan ee bacaha xidhan ama qolalka engegan (<30°C, <40% RH).

Cajalad heerkul sare leh ee PTFE waxay leedahay iska caabin milix ah oo aad u wanaagsan, laakiin dhibcaha daciifka ah waa lakabka koollada iyo cidhifyada substrate fiberglass. Hababka qiimaynta: 1000h tijaabo buufin milix dhexdhexaad ah (NSS), cabbiraadda xajinta xoogga diirka (≥80% loo baahan yahay), ciladaha aragga (qaadista, finan), iyo daxalka substrate biraha. Deegaannada badda iyo milixda-sare: isticmaal silikoon PSA (ma aha acrylic), substrate PTFE oo si buuxda u milmay, cidhifyada shaabada leh ee cimiladu u adkeysaneyso, oo ku dalbo asal biraha dushooda.

Dharka heerkulkiisu sareeyo ee PTFE (Fiberglass-dahaarka PTFE) ayaa ku dhow kiimiko ahaan aan shaqaynayn, laakiin maaddooyinka qaarkood waxay sababaan daxalka xaalado gaar ah. Weerarka tooska ah ee PTFE wuxuu ku dhacaa biraha alkaliska ah ee dhalaalay (sodium, potassium), wakiilada fluorinada ee xooggan (F₂, ClF₃) heerkul sare, iyo dhalaalid alkalis xooggan oo ka sarreeya 300°C. Daxalka aan tooska ahayn wuxuu dhacaa marka hydrofluoric acid (HF), alkalis kulul, ama phosphoric acid kulul ay galaan cilladaha daahan oo ay weeraraan substrate-ka fiberglass-ka. Adeegga kiimikada daran, isticmaal filimka PTFE saafi ah oo aan lahayn fiberglass.

PTFE-cajalad heerkulkeedu sarreeyo waxay luminaysaa xabagta ka dib isticmaalka soo noqnoqda ee wasakhaysan dusha sare ( boodhka, saliidda silikoonka), koollada isku xidhka ah (haraad), ama isku xidhka substrate daciifka ah. Xalka: PSA silikoon-iskutallaabta-sare ah (guuritaan hoose, taako isku dheeli tiran/xajinta awoodda), daawaynta asaasiga ah ee substrate-ka PTFE, taageerka fiberglass cufan, iyo maaraynta habboon ( sagxadaha nadiifka ah, diirka qabow, xagal 180°). Tijaabada tirade waxa ay ansixiyaa horumar

Dharka heerkulku sareeyo ee PTFE (Fiberglass-dahaarka leh ee PTFE) waxay leedahay iska caabin kulayl heersare ah oo heersare ah oo u dhexeeya inta u dhaxaysa -70°C ilaa 260°C. Waxay u adkaysan kartaa baaskiil wadida heerkulka degdega ah, tusaale ahaan, ka guurista qaboojiyaha -50°C una guurto cadaadis kulul oo 260°C ah. Heerarka qiimaha leh xitaa waxay ka badbaadaan qaboojin degdeg ah 260°C ilaa 10°C biyo ah. Si kastaba ha ahaatee, ka nixin walxaha heerkul ka sarreeya 300 ° C (oo u dhow PTFE's 327 ° C barta dhalaalka) waxay keeni doontaa dillaac degdeg ah iyo delamination. Substrate-ka fiberglassku wuxuu bixiyaa xasilloonida cabbirka; daahan PTFE waa qodobka xaddidaya.

Dharka heerkulka sare ee PTFE waxaa si ballaaran loo isticmaalaa warshadaha kiimikada ee toddobada codsiyo muhiim ah: flange gaskets iyo dahaarka tuubada (iska caabiya acids / alkalis xoog leh), reactor iyo dahaarka taangiga (hortagga daxalka biraha, nadiifinta fudud), bacaha filter gaaska daxalka ah (ilaa 260 ° C), kala-goysyada ballaarinta maro koronto, anti-padssion. daboolka dahaadhka. FDA iyo UL darajooyin la heli karo.

PTFE-cajalad heerkul sare ah oo lagu kaydiyay xaalado cayiman (10-25°C, 40-70% RH, ka fog UV/cadaadiska culus) waxay leedahay nolol shelf heerkeedu yahay 3-6 bilood (darajooyin qaali ah ilaa 12 bilood). Heerarka ugu muhiimsan ee hoos u dhaca: xoogga diirka waa inuusan hoos uga dhicin 70% qiimaha bilowga; ma jiro hadhaaga xabagta kadib ka saarista heerkulka sare; ma jiro kaarboonization ama dildilaac heerkulka la qiimeeyay. Jeegaga degdega ah: Dareen ka bixitaan gacan, 260°C hadhaaga tijaabada, iyo tijaabada yaraynta lamination.

Dharka heerkulka sare ee PTFE (Fiberglass PTFE-dahaarka leh) waxay bixisaa afar faa'iidooyin oo muhiim ah sida dahaarka ka-hortagga daxalka: kiimikaad-ka-hortagga aqua regia, alkalis xooggan, dareeraha), heerkulka ballaaran (-70 ° C ilaa 260 ° C joogto ah, 350 ° C ugu sarreysa), ka hortagga xasilloonida cabbirka (<0.5% nadiifinta dusha sare), iyo nadiifinta dusha sare). Loo isticmaalo tuubooyinka kiimikada, munaaradaha nadiifinta, taangiyada wax lagu guro, iyo qalabka cuntada/farmasiga. Heerarka FDA waa la heli karaa.