Tam sim no, qhov zoo ntawm domestic hydroxypropylulose ntau heev, ua rau nws nyuaj rau cov neeg siv khoom los xaiv qhov yog. Tus HPM hloov kho ntawm tib lub tuam txhab txawv teb chaws yog qhov txiaj ntsig ntawm ntau xyoo ntawm kev tshawb fawb. Qhov sib ntxiv ntawm cov tshuaj yeeb dej caw tuaj yeem txhim kho kev ua haujlwm thiab txhim kho cov haujlwm. Ntawm chav kawm, nws yuav cuam tshuam qee qhov khoom, tab sis feem ntau hais lus nws tau muaj txiaj ntsig; Lub hom phiaj tsuas yog lwm cov khoom xyaw yog kom txo cov nqi, ua rau muaj kev txo qis, cov khoom ntawm cov khoom lag luam, ua rau muaj ntau yam teeb meem kev tsim khoom.
Muaj raws li qhov sib txawv ntawm cov ntshiab HPMC thiab deev ntxhais hu ua HPMC:
1. Ntshiab HPMC yog visually fluffy thiab muaj qhov tsawg bulk ntom ntom, xws li 0.3-0.4g / ml; Adulterated HPMC muaj cov fluidity zoo dua thiab muaj qhov hnyav dua, uas yog obviously sib txawv ntawm cov khoom muaj tseeb hauv tsos.
2. Ntshiab HPMC aqueous yog tseeb, muaj teeb meem kev hloov chaw, thiab dej khaws nyiaj khaws cia ≥ 97%; Adulterated HPMC aqueous daws yog huab, thiab cov dej khaws cia yog qhov nyuaj kom ncav cuag 80%.
3. Ntshiab HPMC yuav tsum tsis hnov ntxhiab ammonia, cov hmoov txhuv nplej siab thiab dej cawv; Adulterated HPMC feem ntau hnov tsw ntxhiab txhua yam tsw ntxhiab tsw, txawm tias nws yog tasteless, nws yuav hnov hnyav.
4. Ntshiab HPMC hmoov yog fibrous nyob rau hauv lub tsom taws xob lossis lub iav loj; Adulterated HPMC tuaj yeem pom tias yog cov khib nyiab los yog muaju hauv qab lub tshuab tsom lossis lub khob loj dua.
Qhov siab insurmount qhov siab ntawm 200,000?
Ntau cov kws tshaj lij hauv tsev thiab kws tshawb fawb tau tshaj tawm tias HPMC ntau lawm tsis muaj peev xwm tsim cov khoom lag luam uas tsis tuaj yeem tsim cov khoom lag luam nrog cov viscosity ntau tshaj 200,000. Nyob rau lub caij ntuj sov, nws yog txawm tsis yooj yim sua tsim cov khoom lag luam nrog viscosity ntawm ntau tshaj 80,000. Lawv ntseeg tias qhov thiaj li hu 200,000 cov khoom yuav tsum yog cov khoom cuav.
Tus kws tshaj lij sib cav tsis yog lub zog. Raws li cov teeb meem dhau los ua haujlwm dhau los, cov lus xaus saum toj no tuaj yeem kos tau.
Tus yuam sij rau nce lub visccosity ntawm HPMC yog qhov kev sib khi siab ntawm cov tshuaj reactor thiab cov tshuaj tiv thaiv siab zoo li cov khoom siv raw zoo. Lub airtightness tiv thaiv kev ua kom muaj kev cuam tshuam ntawm cov pa roj oxygen los ntawm cov tshuaj oxygen, thiab cov tshuaj tiv thaiv kev loj rau hauv cellulose thiab ua kom cov khoom sib txawv ntawm cov khoom.
Qhov yooj yim ntawm 200000CPS HydroxyPropyyl methylenCulose:
2% aqueous daws viscosity 200000CPS
Khoom Purity ≥98%
Methoxy Cov ntsiab lus 19-24%
Hydroxyprropoxy Cov ntsiab lus: 4-12%
200000CPS HydroxyPropyyl methylcellulose nta:
1. Cov dej zoo khaws cia thiab thickening cov khoom los xyuas kom meej li co las ntawm cov slurry.
2. Muaj lub zog siab thiab muaj huab cua loj heev ntawm cov nyhuv cua, zoo nyob tiv thaiv shrinkage thiab tawg.
3. Ncua lub tshav kub tso tawm ntawm txoj kev ntsuas dej xis mas, ncua sijhawm lub sijhawm teem sijhawm, thiab tswj lub sijhawm ua haujlwm ntawm xis mas cug.
4. Txhim kho cov dej sib raug zoo ntawm cov tshuaj khib lav, txhim kho cov rhuaology, thiab tiv thaiv kab mob segration thiab los ntshav.
5. Cov khoom tshwj xeeb, tsom mus rau qhov kev tsim kho cua sov nyob rau lub caij ntuj sov, kom ntseeg tau tias cov quav ntawm cov slurry yam tsis muaj kev cuam tshuam.
Vim yog cov lax kev saib xyuas kev saib xyuas, kev sib tw hauv kev lag luam cug yog ua rau muaj tsiv zuj zus lawm. Txhawm rau kom muaj feem rau kev ua lag luam, qee tus tub lag luam tau sib xyaw nrog cov tshuaj uas tsis muaj txiaj ntsig los ua cov roj pheej yig los ua cov pheej yig cellulose ether. Ntawm no, cov editor yog lub luag haujlwm kom nco qab cov neeg siv khoom tsis txhob dag ntxias, yog li tsis txhob raug dag kom loj hlob, thiab thaum kawg qhov poob outweiv qhov nce.
Cov qauv deev thiab cov txheej txheem qhia qhia:
(1) Ntxiv rau txoj kev sib ntxiv rau cellulose cellulose cellulose tuaj yeem nce nce cov visculose nrawm, ua rau nws tsis tuaj yeem txheeb xyuas nws nrog tus visluse.
Cov qauv kev qhia: Vim muaj cov yam ntxwv ntawm kev tawm suab, qhov kev daws teeb meem zoo li no, yog li hu ua nplaum tab sis tsis txuas nrog.
(2) Ntxiv cov hmoov txhuv nplej siab rau cellulose ether. Cov hmoov txhuv nplej siab feem ntau insoluble hauv dej, thiab cov kev daws teeb meem feem ntau muaj kev hloov pauv tsis zoo.
Kev txheeb xyuas hom: Tso cov cellulose ether nrog iodine, yog tias cov xim tig xiav, nws tuaj yeem suav tau tias cov hmoov txhuv nplej siab tau ntxiv.
(3) Ntxiv polyvinyl cawv hmoov. Raws li peb txhua tus paub, tus nqi lag luam ntawm polyvinyl cawv hmoov xws li ntawm cellulose feem ntau yuav txo tus nqi ntawm cellulose ether.
Tus qauv qhia ntawv: Qhov no zoo ntawm cellulose ether yog feem ntau granular thiab ntom. Dissolves sai nrog dej, xaiv cov tshuaj nrog ib tus pas nrig iav, yuav muaj kev ntsuas pom tseeb ntxiv.
Ntsiab lus: Vim nws cov qauv tshwj xeeb thiab cov pab pawg, dej khaws cia ntawm cellulose tsis tuaj yeem hloov los ntawm lwm cov tshuaj. Tsis hais dab tsi ntawm cov tub lim tov muaj ntau yam hauv, tsuav nws tau sib xyaw ua ke, nws cov dej khaws cia yuav muaj kev txo qis heev. Tus nqi HPMC nrog kev xaiv viscosity ntawm 10W nyob rau hauv txoj kev khib caj dab yog 0.15 ~ 0.2 ‰, thiab dej rov qab los> 88%. Los ntshav yog loj dua. Yog li ntawd, cov dej khaws cia yog qhov ntsuas tseem ceeb los ntsuas HPMC, txawm nws yog qhov zoo lossis tsis ntev npaum li nws yuav pom tseeb ntawm ib nrais muag.
Lub Sijhawm Post: Lub Tsib Hlis-10-2023