Hydroxypropyl methylcellulose (HPMC) yog ib hom semi-synthetic cellulose derivative dav siv hauv kev lag luam, kev tsim kho, khoom noj thiab lwm yam.
(1) Cov yam ntxwv tseem ceeb ntawm HPMC
HPMC yog cov hmoov dawb uas yaj hauv dej los tsim cov kua dej khov kho. Nws muaj qhov zoo adhesion, stability thiab thickening zog, thiab tuaj yeem tsim cov duab pob tshab. Cov khoom ntawm HPMC nyob ntawm seb nws cov qib methylation thiab hydroxypropylation, yog li muaj ntau qhov sib txawv thiab kev siv.
(2) Cov chaw thov tseem ceeb thiab kev siv HPMC
1. Kev lag luam kws tshuaj
a. Raws li tus neeg nqa tshuaj thiab tus neeg sawv cev tso tawm
HPMC feem ntau yog siv los ua tus neeg saib xyuas kev tso tawm hauv kev npaj tshuaj. Hauv cov ntsiav tshuaj thiab tshuaj ntsiav, HPMC tuaj yeem tsim cov yeeb yaj kiab ruaj khov thiab tswj cov tshuaj tso tawm. Thaum siv, HPMC yog tov nrog cov khoom xyaw tshuaj. Tom qab ntsiav tshuaj lossis ntim cov tshuaj ntsiav, HPMC tuaj yeem maj mam tso cov tshuaj hauv plab hnyuv.
b. Raws li ib tug binder
Hauv kev tsim cov ntsiav tshuaj, HPMC feem ntau yog siv los ua cov ntawv khi. Thaum sib xyaw nrog lwm cov khoom xyaw, nws tuaj yeem txhim kho lub zog thiab ruaj khov ntawm cov ntsiav tshuaj.
c. Raws li tus neeg sawv cev ncua
Hauv cov tshuaj ua kua, HPMC tuaj yeem tiv thaiv cov khoom xyaw tshuaj los ntawm kev daws teeb meem, yog li tswj xyuas qhov sib xws ntawm cov tshuaj.
2. Kev tsim kho kev lag luam
a. Raws li ib tug thickener rau cement mortar
Hauv kev tsim kho, HPMC yog siv los sib xyaw cov cement, xuab zeb thiab lwm yam khoom siv los txhim kho cov adhesion thiab kev tsim kho ntawm mortar. Nws tuaj yeem txhim kho cov dej tuav ntawm mortar thiab tiv thaiv kom tsis txhob ziab sai heev, yog li ua kom lub sijhawm ua haujlwm ntawm mortar.
b. Raws li ib tug additive rau pobzeb nplaum
HPMC tuaj yeem siv los ua cov khoom siv ntxiv rau cov nplais nplaum txhawm rau ua kom cov nplaum nplaum thiab kev tsim kho ntawm cov nplaum thiab tiv thaiv cov cib los ntawm kev poob.
3. Kev lag luam zaub mov
a. Raws li cov zaub mov thickener thiab stabilizer
HPMC feem ntau yog siv los ua thickener hauv cov zaub mov, xws li jams, jellies thiab dej haus. Nws tuaj yeem ua kom cov viscosity ntawm cov khoom thiab tswj cov khoom ruaj khov.
b. Raws li ib tug zaub mov zaj duab xis qub
HPMC tuaj yeem siv rau hauv kev tsim cov ntawv ntim khoom noj los tsim cov yeeb yaj kiab pob tshab los tiv thaiv zaub mov.
4. Kev lag luam tshuaj pleev ib ce
a. Raws li ib tug thickener rau tshuaj pleev ib ce
HPMC feem ntau yog siv rau hauv cov tshuaj pleev ib ce, xws li tshuaj ntxuav lub ntsej muag, tshuaj pleev ib ce, thiab lwm yam, ua cov thickener los txhim kho cov kev ntxhib los mos thiab ruaj khov ntawm cov khoom.
b. Raws li zaj yeeb yaj kiab qub
HPMC tuaj yeem tsim cov zaj duab xis pob tshab thiab siv los ua zaj duab xis yav dhau los hauv cov khoom tu tawv nqaij, xws li lub ntsej muag lub ntsej muag.
(3) Kev ceev faj rau kev siv HPMC
Solubility
Lub dissolution tus nqi ntawm HPMC yog cuam tshuam los ntawm kub thiab nplawm tej yam kev mob. Xyuas kom meej tias qhov sib tov yog stirred tusyees thaum lub sij hawm dissolution kom tsis txhob agglomeration.
Concentration tswj
Kho qhov concentration ntawm HPMC raws li daim ntawv thov. Hauv kev npaj tshuaj, qhov siab dhau heev tuaj yeem cuam tshuam qhov tso tawm ntawm cov tshuaj; Hauv cov khoom siv hauv tsev, qhov concentration tsawg dhau yuav ua rau cov khoom siv tsis txaus.
Cia tej yam kev mob
HPMC yuav tsum tau muab cia rau hauv qhov chaw qhuav, txias, tsis txhob kub thiab av noo kom nws ruaj khov thiab ua haujlwm tau zoo.
Kev sib haum xeeb
Thaum ua ntawv thov HPMC, nws qhov kev sib raug zoo nrog lwm cov khoom xyaw yuav tsum tau txiav txim siab, tshwj xeeb tshaj yog thaum siv tshuaj thiab khoom noj, kom ntseeg tau tias tsis muaj kev phiv tshwm sim.
HPMC yog ntau yam cellulose derivative nrog ntau yam kev siv. Los ntawm kev siv tshuaj mus rau kev tsim kho, khoom noj rau cov tshuaj pleev ib ce, HPMC cov khoom tshwj xeeb ua rau nws ua lub luag haujlwm tseem ceeb hauv ntau yam khoom. Thaum siv nws, nws yog ib qho tsim nyog los xaiv qhov tsim nyog specifications thiab concentrations raws li cov kev thov tshwj xeeb, thiab xyuam xim rau nws cov solubility thiab cia tej yam kev mob los xyuas kom meej cov hauj lwm zoo thiab stability ntawm cov khoom.
Post lub sij hawm: Aug-09-2024