Cov khoom ua kom tuab rau cov xim latex yuav tsum muaj kev sib raug zoo nrog cov tshuaj emulsion polymer compound, txwv tsis pub cov zaj duab xis txheej yuav muaj me ntsis reticulate, thiab yuav tsim cov khoom sib sau ua ke tsis tuaj yeem rov qab tau, uas yuav txo qhov viscosity thiab ua rau cov khoom loj me me. Cov khoom ua kom tuab yuav hloov qhov them ntawm cov emulsion. Piv txwv li, cov khoom ua kom tuab cationic yuav muaj cov nyhuv tsis tuaj yeem rov qab tau rau cov anionic emulsifier kom tawg cov emulsion. Cov khoom ua kom tuab zoo tagnrho rau cov xim latex yuav tsum muaj cov yam ntxwv hauv qab no:
1. Cov tshuaj tsawg thiab viscosity zoo
2. Kev ruaj khov zoo, tsis muaj viscosity txo vim yog qhov kev ua ntawm cov enzymes, thiab tsis muaj viscosity txo vim yog kev hloov pauv ntawm qhov kub thiab PH tus nqi
3, kev khaws dej zoo, tsis muaj qhov tshwm sim ntawm npuas pom tseeb
4. Tsis muaj kev phiv rau cov khoom ntawm zaj duab xis xws li kev txhuam tsis kam, ci ntsa iab, lub zog zais thiab kev tiv thaiv dej
5. Tsis muaj cov xim flocculation
Cov txheej txheem ua kom cov xim latex tuab yog ib qho tseem ceeb los txhim kho qhov zoo ntawm cov xim latex thiab txo tus nqi. Hydroxyethyl cellulose yog ib qho khoom ua kom tuab zoo tagnrho, uas muaj ntau yam teebmeem rau kev ua kom tuab, kev ruaj khov thiab kev hloov pauv ntawm cov xim latex.
Hauv cov txheej txheem tsim cov xim latex,Hydroxyethyl Cellulose (HEC)Siv ua tus neeg faib khoom, ua kom tuab thiab ua kom cov xim tsis lo rau kom ruaj khov qhov viscosity ntawm cov khoom, txo cov agglomeration, ua kom cov xim zaj duab xis du thiab du, thiab ua rau cov xim latex ruaj khov dua. Rheology zoo, tuaj yeem tiv taus lub zog shear siab, thiab tuaj yeem muab kev sib npaug zoo, tiv taus khawb thiab cov xim sib xws. Tib lub sijhawm, HEC muaj kev ua haujlwm zoo heev, thiab cov xim latex uas tuab nrog HEC muaj pseudoplasticity, yog li cov txheej txheem tsim kho xws li txhuam, dov, sau, thiab txau muaj qhov zoo ntawm kev txuag zog, tsis yooj yim ntxuav thiab sag, thiab tsawg dua splashing. HEC muaj kev txhim kho xim zoo heev. Nws muaj kev sib xyaw zoo heev nrog feem ntau cov xim thiab cov binders, ua rau nws muaj peev xwm tsim cov xim latex nrog cov xim zoo sib xws thiab ruaj khov. Qhov versatility siv rau hauv cov qauv, nws yog non-ionic ether. Yog li ntawd, nws tuaj yeem siv rau hauv ntau pH (2 ~ 12), thiab tuaj yeem sib xyaw nrog cov khoom ntawm cov xim latex dav dav xws li cov xim reactive, cov khoom ntxiv, cov ntsev soluble lossis electrolytes.
Tsis muaj kev cuam tshuam tsis zoo rau cov zaj duab xis txheej. Vim tias cov kua dej HEC muaj cov yam ntxwv ntawm qhov dej ntws, nws tsis yooj yim rau ua npuas ncauj thaum lub sijhawm tsim khoom thiab kev tsim kho, thiab qhov tshwm sim ntawm cov qhov hluav taws kub thiab cov qhov pinholes tsawg dua.
Kev ruaj khov zoo rau kev khaws cia. Hauv cov txheej txheem khaws cia mus sij hawm ntev, qhov kev sib kis thiab kev ncua ntawm cov xim tuaj yeem tswj tau, thiab tsis muaj teeb meem ntawm cov xim ntab thiab tawg paj. Thaum muaj txheej dej me me ntawm qhov chaw pleev xim thiab qhov kub khaws cia hloov pauv ntau heev. Nws cov viscosity tseem ruaj khov.
HEC tuaj yeem ua rau kom tus nqi PVC (cov xim ntim concentration) cov khoom khov kho nce mus txog 50-60%. Tsis tas li ntawd, cov xim pleev xim rau saum npoo ntawm cov xim dej kuj tseem siv tau HEC.
Tam sim no, cov thickeners siv rau hauv cov xim pleev xim latex hauv tsev yog cov khoom xa tuaj ntawm HEC thiab acrylic polymers (xws li polyacrylates, homopolymer lossis copolymer emulsion thickeners ntawm acrylic acid thiab methacrylic acid) thickeners.
Hydroxyethyl cellulose tuaj yeem siv rau kev ua cov khoom noj khoom haus
1. Ua ib qho tshuaj dispersant lossis cov kua nplaum tiv thaiv
Feem ntau, HEC nrog viscosity ntawm 10 txog 30 mPaS yog siv. HEC txog li 300mPa·S tuaj yeem siv ua ke nrog anionic lossis cationic surfactants, thiab cov nyhuv dispersion zoo dua. Tus nqi siv feem ntau yog 0.05% ntawm qhov hnyav ntawm monomer.
2, ua ib qho thickener
Siv 15000mPa. Qhov kev siv tshuaj ntawm HEC siab viscosity saum toj no s yog 0.5 txog 1% ntawm tag nrho cov hnyav ntawm cov txheej latex, thiab tus nqi PVC tuaj yeem ncav cuag li 60%. Hauv cov xim latex, HEC ntawm kwv yees li 20Pa, s yog siv, thiab ntau yam khoom ntawm cov xim latex yog qhov zoo tshaj plaws. Tus nqi ntawm kev siv HEC saum toj no 30O00Pa.s yog qis dua. Txawm li cas los xij, qhov sib npaug thiab lwm yam ntxwv ntawm cov xim latex tsis zoo. Los ntawm qhov kev xav tau zoo thiab kev txo nqi, nws yog qhov zoo tshaj plaws los siv HEC nruab nrab thiab siab viscosity ua ke.
3. Txoj kev siv rau hauv cov xim latex
HEC kho qhov chaw tuaj yeem ntxiv rau hauv cov hmoov qhuav lossis cov slurry daim ntawv. Cov hmoov qhuav yog ncaj qha ntxiv rau cov xim sib tsoo. Lub pH ntawm qhov ntxiv yuav tsum yog 7 lossis qis dua. Cov khoom alkaline xws li dispersants tuaj yeem ntxiv tom qabHECtau ntub thiab tag nrho dispersed. Slurry ua nrog HEC yuav tsum tau sib xyaw rau hauv cov slurry ua ntej HEC muaj sijhawm txaus los hydrate thiab thickened rau ib qho tsis siv tau. HEC slurries kuj tuaj yeem npaj nrog glycol-based coalescing agents.
4. Tiv thaiv cov pwm ntawm cov xim latex
HEC uas yaj tau hauv dej yuav lwj thaum raug rau cov pwm uas tshwj xeeb rau cellulose thiab nws cov derivatives. Ntxiv cov tshuaj preservatives rau xim ib leeg tsis txaus, txhua yam khoom yuav tsum tsis muaj enzyme. Cov tsheb tsim cov xim latex yuav tsum khaws cia kom huv si thiab huv si, thiab txhua yam khoom siv yuav tsum tau sterilized tas li nrog cov pa 0.5% formalin lossis 0.1% mercury kua.
Lub sijhawm tshaj tawm: Plaub Hlis-25-2024