Iyadoo la horumarinayo oo la adeegsanayo rinjiga latex-ka ee biyaha ku salaysan, doorashada dhumuc-dhejinta rinjiga latex-ka waa kala duwan tahay. Hagaajinta rheology-ga iyo xakamaynta viscosity-ga rinjiga latex-ka laga bilaabo heerarka sare, dhexdhexaadka ah iyo kuwa hooseeya. Xulashada iyo codsiga dhumuc-dhejinta rinjiga latex-ka iyo rinjiga latex-ka ee nidaamyada emulsion-ka ee kala duwan (acrylic saafi ah, styrene-acrylic, iwm.).
Doorka ugu muhiimsan ee dhumuc-yaqaannada rinjiga ee latex, kaas oo rheology uu yahay mid ka mid ah arrimaha muhiimka ah ee sameeya muuqaalka iyo waxqabadka filimada rinjiga. Sidoo kale tixgeli saameynta viscosity-ga ee roobka midabka, cadayashada, simitaanka, buuxinta filimka rinjiga, iyo burburka filimka dusha sare inta lagu jiro cadayashada toosan. Kuwani waa arrimo tayo leh oo ay inta badan soo saarayaashu tixgeliyaan.
Halabuurka dahaarka ayaa saameeya habka rinjiga latex-ka, waxaana la hagaajin karaa iyadoo la beddelayo isku-darka emulsion-ka iyo isku-darka walxaha kale ee adag ee ku kala firirsan rinjiga latex-ka. Si kastaba ha ahaatee, kala duwanaanshaha hagaajinta waa xaddidan yahay kharashkuna waa sarreeyaa. Dheefshiidka rinjiga latex-ka waxaa inta badan hagaajiya kuwa dhumucda leh. Dhufnaanta inta badan la isticmaalo waa: dhumucyeyaasha ether-ka cellulose, dhumucyeyaasha emulsion-ka polyacrylic acid ee alkali-bararsan, dhumucyeyaasha polyurethane ee aan ionic ahayn, iwm. Dhufnaanta ether-ka ee Hydroxyethyl cellulose waxay inta badan kordhisaa dhefnaanta dhexdhexaadka ah iyo tan hoose ee rinjiga latex-ka, waxayna leedahay thixotropy weyn. Qiimaha wax soo saarku waa weyn yahay. Silsiladda ugu weyn ee hydrophobic-ka ee dhumuciyaha cellulose-ka waxay la xiriirtaa molecules-ka biyaha ee ku wareegsan iyada oo loo marayo isku-xidhka hydrogen, taas oo kordhisa mugga dareeraha ee polymer-ka laftiisa. Meesha loogu talagalay dhaqdhaqaaqa xorta ah ee walxaha waa la dhimaa. Dheefshiidka nidaamka ayaa la kordhiyaa, qaab-dhismeed shabakad isku xiran ayaa la sameeyaa inta u dhaxaysa midabka iyo walxaha emulsion-ka. Si loo kala saaro midabada midba midka kale, walxaha emulsion-ka si dhif ah ayay u nuugaan.
Waqtiga boostada: Noofambar-02-2022