Qadarka wax lagu daro daahan ee daahan waa mid aad u yar, laakiin waxa ay siin kartaa daahan guryaha farsamo aad u fiican iyo guryaha kiimikada deggan, oo uu noqday qayb lagama maarmaan ah oo daahan.Thickerer waa nooc ka mid ah waxyaabaha rinjiga lagu daro.Waa qayb aad muhiim u ah oo lagu daro daaha-biyoodka oo leh aragti hoose.Waxa ku jira biyuhu waa weyn yihiin dareerehooduna waa yar yihiin, taas oo u baahan in lagu daro qaar dhumucyo leh si ay u baabi'iyaan viscosity-kooda.Intaa waxaa dheer, rinjiga cinjirka ah wuxuu inta badan la kulmaa dhibaatooyinka kala soocida biyaha inta lagu jiro wax soo saarka, gaadiidka, kaydinta, iyo dhismaha.Inkasta oo ay dib u dhigi karto iyada oo la kordhinayo viscosity iyo kala firdhisanaanta rinjiga cinjirka, saamaynta hagaajinta noocan oo kale ah ayaa inta badan xaddidan oo ka sii muhiimsan.Ama iyada oo loo marayo xulashada dhumucda iyo isticmaalkeeda si loo xalliyo dhibaatadan.
Kala firdhi Dhuxusha Daabacaadda Dhiig-baxa
Doorka dhumucda mid ka ilaali rinjiga inuu hoos u dhaco marka rinjiyeynta dusha sare.Kala firdhida Daabacaadda Dhuxusha waa kiimiko riyooloji ah.Ujeeddadeeda ugu weyn waa in la kordhiyo joogtaynta, la xakameeyo sifooyinka saxda ah ee alaabta dareeraha, hagaajinta dareeraha iyo heerka, iyo ka hortagga dhacdooyinka dhismaha.Ifafaalaha guracan, gaar ahaan darbiyada toosan ama geesaha iyo geesaha, ayaa si fiican loo rinjiyeeyay.Rinjiyeyntu waa labis badan oo midabkuna waa ka buuxsamay, taas oo aan saameyn ku yeelan doonin habka soo socda.Rinjiga aan lahayn dhumucdiisuna waxay u qulquli doonaan sida biyo oo kale.Doorka dhumuclaha laba kaydinta xasiloon ee rinjiga.Dhumucdiisuna waxay leedahay sifooyin kiimikaad oo deggan oo si fiican ula noolaan kara waxyaabo kala duwan oo rinjiga ah, si aanay u muuqan khafiifin iyo delamination, waxayna ka ilaalin kartaa rinjiga inuu dejiyo.Ka dib marka rinjiga lagu daro dhumucdiisuna waxay kordhisaa viscosity, kaas oo ka hortagi kara qaybaha kala firdhiyey ee rinjiga ka soo baxa iyo roobka inta lagu jiro kaydinta, si loo gaaro kaydinta xasilloon.Saamaynta dhumucda sadexaad Xakamee dareeraha rinjiga.Ku darida dhumucda rinjiga waxay sii dheerayn kartaa wakhtiga samaynta filimka ee rinjiga, waxay yaraynaysaa qulqulka iyo daadinta inta lagu jiro daahan rullaluistemadka ama cadayashada, si loo gaaro shaqada ee siman ee filimka daahan.Dhumucyada dahaarka waxaa loo qaybin karaa laba qaybood iyadoo loo eegayo noocyadooda Dhumucdiisuna waxay si wax ku ool ah u hagaajin kartaa viscosity-xiirid hoose oo ka dhigi nidaamka daahan inuu leeyahay pseudoplasticity sare.Dahaarka leh dhumucdiisuna aan associative sida qaabeynta dhumuc weyn ayaa leh qaab-dhismeedka jel sare.Oo ay ku jiraan: inorganic, ether cellulose, dhumucdiisuna acrylic alkali-barar;Dhuxusha associative waa polymer-biyood-milmi leh, guud ahaan waxa loola jeedaa polymer-ka-biyo-biyoodka leh oo leh qadar yar oo ah kooxaha hydrophobic ee silsiladda macromolecular hydrophilic, oo ay ku jiraan: dhumuc alkali-barari hydrophobically, polyurethane non-ionic, cellulose hydrophobically modified. .Dhumuc wanaagsani waa inuu buuxiyaa shuruudaha soo socda: Hagaajinta viscosity ee rinjiga oo joojiso kala-soocidda rinjiga inta lagu jiro kaydinta, Yaree viscosity marka rinjiyeynta xawaaraha sare, Ka dib rinjiyeynta, kordhi viscosity ee filimka daahan oo ka hortag hoos u.Kaydinta dhumucda rinjiga Dhumucda rinjiga waa in lagu kaydiyaa deegaan leh heerkul 5 ~ 40℃, meesha wax lagu kaydiyaana waa inay ahaataa mid qalalan oo hawo leh.Haddii alaabtu si lama filaan ah u barafto, waa in lagu dhalaaliyaa biyo diirran oo si fiican loo qaso.Intaa waxaa dheer, dhumucda rinjiga waa in sidoo kale lagu kaydiyaa weelkii asalka ahaa, ama galaas kale, birta aan fiicnayn, balaastiigga ama weelasha resin ee epoxy, ee aan ku jirin birta kaarboon hoose, naxaasta ama aluminiumka weelasha.
Waqtiga boostada: Juun-05-2020