Ua ntej ntawm tag nrho cov, qib ntawm kev tsim kho kua nplaum yuav tsum coj mus rau hauv tus account cov ntaub ntawv raw. Qhov laj thawj tseem ceeb rau txheej txheej ntawm cov kua nplaum yog qhov tsis sib xws ntawm acrylic emulsion thiab hydroxypropyl methylcellulose (HPMC). Thib ob, vim lub sijhawm sib xyaw tsis txaus; kuj tseem muaj kev ua haujlwm tsis zoo ntawm kev tsim cov kua nplaum. Hauv kev tsim cov kua nplaum, koj yuav tsum siv tam sim hydroxypropyl cellulose (HPMC), vim tias HPMC tsuas yog tawg hauv dej, nws tsis yaj tiag tiag. Tom qab li 2 feeb, lub viscosity ntawm cov kua maj mam nce, ua kom pob tshab viscous colloidal tov. Cov khoom kub yaj, thaum raug dej txias, tuaj yeem tawg sai sai hauv cov dej kub npau npau thiab ploj mus rau hauv dej npau npau. Thaum qhov kub thiab txias poob mus rau ib qho kub, qhov viscosity maj mam tshwm kom txog thaum lub pob tshab kua nplaum colloidal ua tiav. Qhov pom zoo kom noj ntau npaum li cas ntawm hydroxypropyl methylcellulose (HPMC) hauv kev tsim cov kua nplaum yog 2-4KG.
Hydroxypropyl methylcellulose (HPMC) muaj lub cev ruaj khov hauv kev tsim cov nplaum nplaum, thiab muaj cov nyhuv zoo heev ntawm kev tshem tawm cov pwm thiab kaw dej, thiab yuav tsis cuam tshuam los ntawm kev hloov pauv ntawm pH nqi. Cov viscosity tuaj yeem siv li ntawm 100,000 s thiab 200,000 s. Hauv kev tsim khoom, qhov siab dua qhov viscosity, qhov zoo dua. Viscosity yog inversely proportional rau daim ntawv cog lus compressive zog. Qhov siab dua qhov viscosity, qhov qis dua lub zog compressive. Feem ntau, viscosity ntawm 100,000 s yog tsim nyog.
Sib tov CMC nrog dej thiab ua cov av nkos rau kev siv tom qab. Thaum txhim kho CMC muab tshuaj txhuam, ntxiv ib qho dej txias rau hauv lub tank nrog lub tshuab nplawm. Thaum lub tshuab nplawm pib, maj mam thiab sib npaug ntawm cov carboxymethyl cellulose rau hauv lub tank batching, thiab txuas ntxiv mus, kom cov carboxymethyl cellulose thiab dej yog fused tag, thiab carboxymethyl cellulose yog yaj tag. Thaum dissolving CMC, nws yog feem ntau yuav tsum tau disperse tusyees thiab sib tov tsis tu ncua, thiaj li zoo dua "tiv thaiv lub clumping thiab agglomeration ntawm CMC tom qab nws ntsib dej, thiab txo qhov teeb meem ntawm CMC dissolution" thiab ua rau kom lub dissolution tus nqi ntawm CMC. .
Lub sijhawm sib xyaw tsis zoo ib yam li lub sijhawm rau CMC kom yaj tag. yog 2 txhais. Feem ntau hais lus, lub sijhawm sib xyaw yog luv dua li lub sijhawm rau CMC kom yaj tag, nws nyob ntawm cov ntsiab lus. Lub hauv paus rau kev txiav txim rau lub sijhawm sib xyaw yog tias thaum CMC sib xyaw ua ke hauv cov dej tsis muaj qhov pom tseeb, qhov sib xyaw tuaj yeem raug tso tseg, kom CMC thiab dej tuaj yeem nkag mus rau hauv ib leeg raws li cov ntaub ntawv zoo li qub. Muaj ob peb lub laj thawj rau kev txiav txim siab lub sijhawm xav tau rau kev ua tiav ntawm CMC:
(1) CMC thiab dej sib xyaw ua ke, thiab tsis muaj cov khoom sib cais ntawm cov kua dej;
(2) Cov khoom sib xyaw ua ke yog qhov zoo sib xws thiab zoo ib yam, nrog rau qhov chaw du thiab du;
(3) Cov khoom sib xyaw ua ke tsis muaj xim thiab tsis muaj pob tshab, thiab tsis muaj qhov sib xyaw ua ke. Nws yuav siv sij hawm 10 mus rau 20 teev los ntawm lub sijhawm thaum CMC muab tso rau hauv lub tank batching thiab tov nrog dej kom txog thaum nws yaj tag.
Post lub sij hawm: Jan-13-2023