Kev paub dav dav ntawm Hydroxypropyl Methylcellulose HPMC

1. Lub hom phiaj tseem ceeb ntawm HPMC yog dab tsi?

Cov khoom no yog siv los ua cov khoom ua kom tuab, cov khoom tawg, cov khoom sib txuas, cov khoom siv ntxiv, cov tshuaj pleev xim uas tiv taus roj, cov khoom sau, cov khoom ua kom emulsifier thiab cov khoom ruaj khov hauv kev lag luam textile. Nws kuj tseem siv dav hauv kev lag luam synthetic resin, petrochemical, ceramic, ntawv, tawv, tshuaj, khoom noj thiab tshuaj pleev ib ce.

2. Lub luag haujlwm ntawm yog dab tsi?HPMChauv cov hmoov putty phab ntsa sab hauv?

HPMC muaj peb lub luag haujlwm: hmoov putty rau sab hauv phab ntsa, thickening, dej-locking thiab kev tsim kho. Concentration: Methyl cellulose tuaj yeem concentrated los ntawm floating lossis aqueous kua kom tswj tau cov haujlwm sib xws thiab sib xws thiab tiv thaiv kev ntws thiab dai. Xauv dej: Cov hmoov phab ntsa sab hauv qhuav qeeb qeeb, thiab cov calcium txiv qaub ntxiv yog pom hauv kev siv dej. Kev tsim kho engineering: Methyl cellulose muaj lub luag haujlwm ntub dej, uas tuaj yeem ua rau cov hmoov putty sab hauv phab ntsa muaj cov qauv engineering zoo. HPMC tsis koom nrog kev hloov pauv ntawm txhua yam tshuaj lom neeg, tab sis tsuas yog koom nrog kev rov ua dua. Cov hmoov putty sab hauv phab ntsa, ntawm phab ntsa, yog kev hloov pauv tshuaj lom neeg, vim tias muaj kev hloov pauv tshuaj lom neeg tshiab, cov hmoov putty sab hauv phab ntsa raug tshem tawm ntawm phab ntsa, milled, thiab rov siv dua, Vim tias cov tshuaj lom neeg tshiab (calcium bicarbonate) tau tsim tawm. Cov khoom tseem ceeb ntawm cov hmoov calcium grey yog: kev sib xyaw ntawm Ca (OH) 2, CaO thiab me me ntawm CaCO3, CaO + H2O = Ca (OH) 2 - Ca (OH) 2 + CO2 = CaCO3↓ + H2O grey calcium hauv dej thiab huab cua Hauv qab kev ua ntawm CO2, calcium carbonate yog tsim, thaum HPMC tsuas yog khaws dej thiab pab txhawb kev ua haujlwm zoo dua ntawm grey calcium, thiab nws tsis koom nrog hauv kev ua haujlwm nws tus kheej.

3. Yuav ua li cas los txiav txim qhov zoo ntawmHPMCyooj yim thiab intuitively?

(1) Dawb: Txawm hais tias dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias ntxiv cov tshuaj ci rau hauv cov txheej txheem ntau lawm, nws yuav cuam tshuam rau nws qhov zoo. Txawm li cas los xij, cov khoom zoo muaj qhov dawb zoo. (2) Qhov zoo: Qhov zoo ntawm HPMC feem ntau yog 80 mesh thiab 100 mesh, 120 mesh tsawg dua, thiab feem ntau HPMC tsim tawm hauv Hebei yog 80 mesh. Qhov zoo dua qhov zoo, qhov zoo dua feem ntau. (3) Kev xa mus: Muab hydroxypropyl methylcellulose (HPMC) rau hauv dej los tsim cov colloid pob tshab, thiab saib nws qhov kev xa mus. Qhov ntau dua qhov kev xa mus, qhov zoo dua, qhia tias muaj cov insolubles tsawg dua sab hauv. . Qhov permeability ntawm lub reactor ntsug feem ntau zoo, thiab lub reactor kab rov tav yog qhov phem dua, tab sis nws tsis txhais tau tias qhov zoo ntawm lub reactor ntsug zoo dua li ntawm lub reactor kab rov tav. Qhov zoo ntawm cov khoom tseem txiav txim siab los ntawm ntau yam. (4) Kev faib ua feem: Qhov loj dua qhov sib piv, qhov hnyav dua qhov zoo dua. Qhov tshwj xeeb siab feem ntau yog vim muaj cov ntsiab lus hydroxypropyl siab hauv nws, thiab cov ntsiab lus hydroxypropyl siab dua, qhov zoo dua qhov khaws cia dej.

4. Yuav tsum tau them sai sai rau dab tsi thaum siv cov viscosity thiab kub ntawm HPMC?

Qhov viscosity ntawm HPMC yog inversely proportional rau qhov kub thiab txias, uas yog, qhov viscosity nce ntxiv thaum qhov kub thiab txias txo qis. Peb feem ntau hais tias qhov viscosity ntawm cov khoom xa mus rau qhov tshwm sim ntawm kev sim nws 2% aqueous kua ntawm qhov kub ntawm 20 degrees Celsius. Hauv kev siv ua haujlwm, hauv thaj chaw uas muaj qhov sib txawv ntawm qhov kub thiab txias loj ntawm lub caij ntuj sov thiab lub caij ntuj no, nws yuav tsum tau sau tseg tias nws raug pom zoo kom siv qhov viscosity qis dua thaum lub caij ntuj no, uas yog qhov zoo dua rau kev tsim kho. Txwv tsis pub, thaum qhov kub thiab txias qis, qhov viscosity ntawm cellulose yuav nce ntxiv, thiab tes yuav hnov ​​​​​​qhov hnyav thaum khawb.

5. Cov txheej txheem yaj ntawm HPMC yog dab tsi?

Txoj kev yaj dej kub: Vim tias HPMC tsis yaj hauv dej kub, HPMC tuaj yeem yaj sib npaug hauv dej kub thaum pib, thiab tom qab ntawd yaj sai sai thaum txias. Ob txoj kev ib txwm muaj raws li nram no: 1). Cov dej kub thiab cua sov txog li 70 ° C. Maj mam ntxiv hydroxypropyl methylcellulose nrog kev sib xyaw qeeb qeeb, pib HPMC ntab saum npoo dej, thiab tom qab ntawd maj mam tsim cov slurry, thiab txias cov slurry nrog kev sib xyaw. 2). Ntxiv 1/3 lossis 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab cua sov rau 70 ° C. Raws li txoj kev ntawm 1), faib HPMC los npaj cov dej kub slurry; tom qab ntawd ntxiv cov dej txias seem rau hauv dej kub Hauv cov slurry, txias cov sib tov tom qab sib xyaw. Txoj kev sib tov hmoov: sib tov HPMC hmoov nrog ntau cov khoom siv hmoov, sib tov kom huv si nrog lub tshuab sib tov, thiab tom qab ntawd ntxiv dej kom yaj, tom qab ntawd HPMC tuaj yeem yaj lub sijhawm no yam tsis muaj clumping thiab agglomerating, vim tias txhua lub ces kaum me me, tsuas muaj me ntsis ntawm HPMC Cov hmoov yuav yaj tam sim ntawd thaum nws ntsib dej. -Cov chaw tsim cov hmoov putty thiab cov mortar siv txoj kev no. [Hydroxypropyl methyl cellulose (HPMC) yog siv los ua cov khoom ua kom tuab thiab khaws dej hauv cov hmoov putty.]

6. Cov koob tshuaj HPMC ntxiv rau hauv cov hmoov putty yog dab tsi?

Tus nqi ntawmHPMCSiv rau hauv daim ntawv thov tiag tiag sib txawv nyob ntawm huab cua, kub, qhov zoo ntawm cov tshauv calcium hauv zos, cov mis ntawm cov hmoov putty, thiab "qhov zoo uas cov neeg siv khoom xav tau". Feem ntau hais lus, nws yog ntawm 4 kg thiab 5 kg. Piv txwv li, cov hmoov putty hauv kev kho kom zoo nkauj'>Beijing feem ntau yog 5 kg; cov hmoov putty hauv Guizhou feem ntau yog 5 kg thaum lub caij ntuj sov thiab 4.5 kg thaum lub caij ntuj no; Yunnan cov khoom ntxiv yog me me, feem ntau 3 kg-4 kg thiab lwm yam.