Thickeners rau cov xim tsev cov xim looj yuav tsum muaj kev sib xyaw zoo nrog cov duab nplaum hauv cov xim yas, thiab yuav tsis muaj me ntsis hauv cov duab yeeb yaj kiab Thickeners yuav hloov pauv cov nqi ntawm emulsion. Piv txwv li, cationic thickeners yuav muaj cov kev cuam tshuam tsis zoo ntawm anionic emulsifiers thiab ua rau begulsification. Qhov zoo tshaj plaws looj cov xim zoo tagnrho yuav tsum muaj cov khoom hauv qab no:
1. Qaub ntau thiab zoo viscosity
2. Cov khoom lag luam kom ruaj khov, yuav tsis txo lub viscosity vim kev txiav txim ntawm cov enzyms, thiab yuav tsis txo lub viscosity vim qhov hloov hauv qhov kub thiab txias thiab PH nqi
3. Cov dej zoo khaws cia, tsis muaj pa npuas
4. Tsis muaj cov kev mob tshwm sim ntawm cov xim pleev xim xws li cov npluaj ua kom tiv thaiv, ci, zais lub zog thiab dej tsis kam
5. Tsis muaj flocculation ntawm pigments
Qhov tuab tuab ntawm cov xim xim looj yog yog qhov tseem ceeb los txhim kho cov kua txiv hmab txiv ntoo zoo thiab txo tus nqi. Hydroxyethyl cellulose yog cov tuab zoo tshaj plaws, uas muaj ntau yam kev cuam tshuam ntau ntawm cov thickening, kev hloov kho ntawm cov xim huv.
Hauv cov txheej txheem ntau lawm ntawm cov xim huv si, hydroxyethyl cellulose ntawm cov khoom lag luam, kom cov xim ua yeeb yaj kiab du thiab du, thiab ua kom cov xim zoo nkauj dua Cov. Zoo rheology, tuaj yeem tiv taus siab zog siab, thiab tuaj yeem muab kev ua kom zoo, kos tsis kam thiab xim sib dhos. Nyob rau tib lub sijhawm, HEC muaj cov xim xim zoo heev, thiab cov kua txhuas zoo tshaj plaws nrog HEC muaj cov kev tsim kho, tsis yooj yim kom pom tseeb, sag, thiab tsawg dua kev sib txig. HEC muaj kev txhim kho xim zoo heev. Nws muaj qhov zoo tshaj plaws ua rau cov neeg feem ntau thiab cov custers, uas ua rau cov xim looj kua yas muaj xim zoo sib xws thiab ruaj khov. Versatility rau kev thov hauv cov qauv tsim, nws yog ib qho tsis-ionic ether. Yog li ntawd, nws tuaj yeem siv rau hauv cov xim dav dav (2 ~ 12), thiab tuaj yeem sib xyaw nrog cov xim yas kom zoo nkauj xws li cov xim sib ntxiv, cov ntsev ntxiv lossis cov khoom siv roj hmab, soluble ntsev lossis soluble ntsev lossis soluble ntsev lossis soluble ntsev lossis soluble ntsev lossis soluble salts lossis elecolytes lossis elecolytes.
Tsis muaj qhov cuam tshuam tsis zoo ntawm txheej yeeb yaj kiab, vim hais tias cov tsiaj aqueque muaj qhov yooj yim rau ua npuas ncauj, thiab qhov nyiam ntawm roob hluav taws xob thiab pinholes yog tsawg dua.
Kev khaws cia zoo. Thaum lub sijhawm ntev, qhov tawg thiab ncua ntawm cov xim tuaj yeem tswj, thiab tsis muaj teeb meem ntawm cov xim ntab thiab tawg paj. Muaj ib txheej dej me me ntawm cov xim pleev xim rau saum npoo, thiab thaum lub thawv ntsuas kub hloov zoo. Nws cov viscosity tseem muaj nyob ruaj khov.
HEC tuaj yeem nce tus nqi PVC tus nqi (cov xim xim ntim cov kev xav tau) cov khoom sib xyaw ua ke txog li 50-60%. Tsis tas li ntawd, cov txheej saum npoo txheej thickener ntawm cov xim xim dej kuj tseem siv tau HEC.
Tam sim no, cov tuab siv nyob rau hauv nruab nrab hauv tsev thiab cov xim tsev qib siab yog cov duab puab, xws li homopolymer pulters ntawm acrylic acid thiab methalicic acid) thickeners.
Hydroxyethyl cellulose tuaj yeem siv rau
1. Raws li cov kua nplaum lossis cov kua nplaum tiv thaiv
Feem ntau, hac nrog viscosity ntawm 10-30mpas yog siv. Tus lej uas tuaj yeem siv tau txog 300MpMpa · S yuav muaj kev sib raug zoo dua yog tias nws siv ua ke nrog kev ua ke nrog anionic lossis cationic surfactants. Qhov siv tshuaj ntau npaum li cas yog feem ntau 0.05% ntawm cov monomer pawg.
2. Raws li lub thickener
Siv 15000Mpa. Cov ntaub ntawv tshuaj ntawm cov high-viscosity hac saum toj s yog 0.5-1% ntawm tag nrho cov xim huv, thiab tus PVC tus nqi tuaj yeem ncav cuag li 60%. Siv hac ntawm txog 20pa, s nyob rau hauv lowex xim, thiab kev ua tau zoo ntawm cov xim yas yog qhov zoo tshaj plaws. Tus nqi tsuas yog siv HEC saud 30o00pa.s yog qis dua. Txawm li cas los xij, cov theem theem ntawm cov xim yas tsis zoo. Los ntawm cov kev pom ntawm qhov ua tau zoo thiab raug txo nqi txo, nws yog qhov zoo dua los siv nruab nrab thiab siab viscosity hac ua ke.
3. Txoj kev sib xyaw hauv cov xim huv
Deg-kho kom zoo rau HEC tuaj yeem ntxiv rau hauv cov hmoov qhuav los yog daim ntawv muab tshuaj txhuam. Cov hmoov mov qhuav tau ntxiv ncaj qha rau cov xim sib tsoo. Cov PH ntawm cov khoom noj yuav tsum yog 7 lossis qis dua. Cov txheej txheem Alkaline xws li Yanbian Dispersant tuaj yeem raug ntxiv tom qab HEC yog wetted thiab tag nrho dispersed. Slurries tau ua nrog hac yuav tsum tau sib xyaw rau hauv slurry ua ntej HEC tau muaj lub sijhawm txaus rau hydrate thiab tso cai rau cov dej tsis tau. Nws tseem muaj peev xwm npaj HEC Pulp nrog ethylene glycol theecing tus neeg sawv cev.
4. Anti-pwm ntawm cov xim pleev xim
Water-soluble HEC will biodegrade when in contact with molds that have special effects on cellulose and its derivatives. Nws tsis txaus los ntxiv cov tshuaj tiv thaiv kom tau xim ib leeg, txhua yam yuav tsum yog enzyme-dawb. Cov tsheb ntau lawm ntawm cov xim yas kom huv thiab txhua yam yuav tsum tau ua kom tsis tu ncua nrog chav 0.5% formalin lossis o.1% mercury tov
Lub Sijhawm Post: Dec-26-2022