impregnation PTFE emulsion waa habka ugu muhiimsan ee soo saarista PTFE dhar heerkul sare leh . Kala firdhisanaanta PTFE kaligiis had iyo jeer ma qoyso, ma dhex gasho, ama si qumman ugu xidhidayso marada fiberglass-ka. Si loo gaaro dahaarka isku midka ah, ku dheggan xooggan, iyo dusha aan cillad lahayn, soosaarayaashu waxay ku daraan kaabayaal shaqeynaya oo kala duwan.
Aokai PTFE waxay hagaajisay qaababka impregnation ee alaabooyin badan. Hagahan waxa uu sharxayaa sideed kaaliyeyaasha ugu caansan - waxa ay qabtaan, sida ay u shaqeeyaan, iyo marka la isticmaalo.
Emulsion-ka ceeriin ee PTFE wuxuu leeyahay xiisad dusha sare oo aad u sareysa, taas oo u horseedda galitaanka liidata ee fiilooyinka iyo dharka. Wakiilada qoynta waxay yareeyaan xiisadda dusha sare, taas oo u oggolaanaysa in emulsionku uu faafo oo uu si wax ku ool ah u galo.
Xiisad dusha sare ee aadka u hooseeya, dhexgalka aad u fiican ee substrates-ka-qoyan Qiyaasta waa in si adag loo xakameeyaa si looga fogaado hoos u dhigista waxqabadka dusha sare ka dib sintering.
Xusuusin muhiim ah: Dabaylaha Fluorocarbon waa kuwo aad waxtar u leh laakiin waxay u baahan yihiin qiyaas taxaddar leh. Xad-dhaafku wuxuu u guuri karaa dusha dahaarka inta lagu jiro qulqulka wuxuuna yareeyaa waxqabadka aan dhegta lahayn.
Wax ka beddelayaasha dhumucda iyo Rheology - Xakamaynta qaadista dahaarka
Dhumucyadu waxay hagaajiyaan viscosity emulsion si ay uga hortagaan dareeraha oo si sax ah u habeeyaan dhumucda dahaarka.
Tilmaan wax ku ool ah: Si aad u heshid dahaar dhuuban, labis ah oo ku yaal maro adag oo tidcan, isticmaal qaab-muuqaal hoose oo dhumuc yar leh. Dahaarka culculus ama dhar-dhoobo furan, kordhi dhumucyada si loo xakameeyo qoto-dheeraanta dhexgalka.
Nidaamiyeyaasha pH iyo Dejinta Emulsion
Emulsions PTFE waxaa guud ahaan xasiliya surfactants anionic waxaana lagu ilaaliyaa pH 9-10 si looga hortago xinjirowga.
Biyaha Ammonia (28 wt%): Nidaamiyaha ugu isticmaalka badan. Si buuxda ayay u rogmataa marka la qalajiyo/qallajinayo, iyada oo aan ka tagin wax hadhaa ah oo wax u dhimaya waxqabadka.
Mechanism: Ka dib hydrolysis, waxay sameeyaan curaarta kiimikada leh fiberglass - Si-O-Si bonds inta u dhaxaysa silane iyo galaas, iyo kooxaha functional organic kuwaas oo la falgala PTFE ama polymers kale.
Digniin: Waa in si taxadar leh loogu daro si looga fogaado jebinta emulsion. Pre-hydrolysis ama daawaynta ka dib (codsiga maro ka hor inta aan uurka lahayn) ayaa lagula talinayaa.
2. Heerkul sare oo u adkaysta xajinta resinnada kala firidhsan
Tusaalooyinka: Kala firdhisanaanta biyaha ee polyamide-imide (PAI), polyphenylene sulfide (PPS), polyethersulfone (PES).
Codsiga: Qalabka muhiimka ah ee dahaarka aan dhegta lahayn iyo xirmooyinka caadiga ah ee warbaahinta shaandhada fiberglass-ka ee uurka leh iyo walxaha xuubabka. Waxay hagaajiyaan isku-xidhka iyo isku-xidhka isku-dhafka ugu dambeeya.
PTFE waxay leedahay viscosity dhalaalid aad u sarreeya. Aaladaha filim-samaynta waxay fududeeyaan isku-dhafka walxaha inta lagu jiro sintayn.
PFA (perfluoroalkoxy resin) - barta dhalaalka hoose marka loo eego PTFE
FEP (fluorinated ethylene propylene copolymer) - barta dhalaalka hoose marka loo eego PTFE
Fluoropolymers-kan dhalaalaysa ee laga shaqayn karo waxay sameeyaan wejiyo isku xidhid dhalaal ah oo u dhexeeya qaybaha PTFE inta lagu guda jiro sintering, kor u qaadida cufnaanta daahan iyo ku dheggan wajiga. Waxay si gaar ah faa'iido ugu leeyihiin dahaarka qaro weyn ama marka heerkul hoose oo hooseeya la rabo.
Buuxiyeyaasha shaqeeya - Guryaha gaarka ah ee Baahida
Buuxiyeyaasha si toos ah ayaa loogu kala firdhiyaa emulsion-ka si loo bixiyo hanti gaar ah.
Muhiim: Buuxiyeyaashu waxay u baahan yihiin kala firdhiyaan qoynta habboon (tusaale, polycarboxylates) si looga hortago xad-gudubka iyo hubinta qaybinta isku midka ah.
Foamers-ka-hortagga godad-ka-hortagga
Xumbo ba'an ayaa dhacda inta lagu jiro uurka, taasoo keenta cilladaha pinhole ee dahaarka.
Nooca
Astaamaha
Foamers-free-Silicone-free (la doorbiday)
Polyether-ku-saleysan, saliid macdan ah oo ku saleysan. Waxa ay meesha ka saartaa halista hadhaaga silikoonka ee farageliya ku dheggan sare ama daawaynta dusha sare.
Foamers silicone
Awoodda xumbo-samaynta xooggan, laakiin isticmaalku wuxuu ku xaddidan yahay codsiyada halka hadhaaga silikoonka la aqbali karo.
Talo soo jeedin: Cajalado PTFE ah oo loo isticmaali doono isku xidhka waxqabadka sare ama codsiyada dahaadhka, foamers-ka xorta ah ee silicone ayaa si xoogan loo door bidaa.
Haddii aad rabto inaad wax badan ka ogaato faahfaahinta faahfaahsan, xaaladaha codsiga iyo xalalka loo habeeyey ee noocyada kala duwan ee alaabtayada, oo ay ku jiraan PTFE dhar heerkul sare ah, cajalado heerkul sare ah PTFE, suumanka mesh PTFE, suumanka mashiinka isku-xidhka ah, maro PTFE hal dhinac ah, heerkul sare oo u adkaysta gudbinta iyo suumanka fiberglaska ah fadlan nala soo xiriir suunka fidsan.
