HydroxyPropyyl methylcellose (HPMC) yog cov polymer ntau yam siv nyob rau ntau yam kev lag luam, suav nrog cov tshuaj, suav nrog cov khoom noj, tshuaj pleev ib ce, thiab kev tsim kho. Nws yog dej-soluble polymer muab tau los ntawm cellulose thiab feem ntau siv los ua tuab, binder, thiab zaj duab xis-forming tus neeg sawv cev. Thaum sib xyaw HPMC nrog dej, ntau yam yuav tsum tau pom tias yog kom muaj kev sib cais thiab kev ua tau zoo tshaj plaws.
1. Nkag siab HPMC:
HydroxyPropyyl methylulose yog ib nrab hluavtaws, inert, tsis muaj ionic cellulose ether. Nws yog tsim los ntawm kev hloov cellulose los ntawm kev ntxiv methyl thiab hydroxypropropyl pawg. Cov kev hloov kho no txhim kho nws cov solubility hauv dej thiab muab ntau hom viscosity. HPMC yuav txawv nyob rau hauv degree ntawm kev hloov pauv (DS) thiab molecular hnyav, ua rau cov qib sib txawv ntawm cov khoom muaj txiaj ntsig.
2. Daim Ntawv Thov HPMC:
HPMC yog dav siv nyob rau hauv ntau yam kev lag luam vim nws qhov kev ua tau zoo:
Kws Tshuaj Ntsuam Xyuas: HPMC yog ib txwm siv los ua tus tswj tus neeg sawv cev tso tawm hauv cov tshuaj yeeb yaj kiab. Nws pab tswj cov tshuaj tso tawm tshuaj thiab txhim kho ntsiav tshuaj khi.
Kev lag luam khoom noj: hauv zaub mov, HPMC yog siv los ua cov tuab, stabilizer thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier thiab emulsifier. Nws txhim kho cov kev ntxhib los mos thiab txee lub neej ntawm cov khoom xws li cov kua qaub, cov khoom qab zib thiab cov khoom noj siv mis.
Kev Tsim Kho: HPMC yog cov khoom tseem ceeb hauv cov tshuaj khib qhuav, muab cov dej ua haujlwm, ua haujlwm thiab tsev neeg. Nws yog dav siv nyob rau hauv cov nplais nplaum, Masas Plaster thiab Grouts.
Cov tshuaj pleev ib ce: nyob rau hauv cov tshuaj pleev ib ce, HPMC ua yeeb yaj kiab yav dhau los thiab thickener hauv cov khoom lag luam xws li cream, tshuaj, thiab tshuaj zawv plaub hau.
Xim thiab txheej: HPMC yog siv los txhim kho qhov sib xws thiab ruaj khov ntawm cov xim tsim qauv, muab cov nplaum zoo dua thiab kev sib tw zoo dua.
3. Xaiv cov qib HPMC tsim nyog:
Xaiv cov qib HPMC tsim nyog nyob ntawm cov kev xav tau ntawm daim ntawv thov. Yam xws li viscosity, loj me me, thiab degree ntawm kev hloov pauv tuaj yeem cuam tshuam kev ua haujlwm ntawm HPMC hauv cov qauv tshwj xeeb. Cov kws tsim khoom feem ntau muab cov ntaub ntawv cov ncauj lus kom ntxaws pab cov neeg siv khoom xaiv cov qib uas haum lawv cov kev xav tau.
4. Kev ceev faj ua ntej sib xyaw:
Ua ntej pib cov txheej txheem sib xyaw, nws yog qhov tseem ceeb los coj qee qhov kev tiv thaiv:
Cov Khoom Pab Tiv Thaiv: Hnav cov khoom tiv thaiv tus kheej (PPE), suav nrog looj hnab looj tes thiab kev nyab xeeb, kom muaj kev nyab xeeb thaum ua haujlwm.
Huv kom huv ib puag ncig: xyuas kom meej tias kev sib xyaw ib puag ncig yog cov kev paug tsis huv uas yuav cuam tshuam qhov zoo ntawm HPMC daws.
Qhov tseeb kev ntsuas: Siv cov cuab yeej ntsuas raug kom ua tiav cov kev xav tau ntawm HPMC hauv dej.
5. Cov lus qhia ib qib-ntawm-kauj ruam rau kev sib xyaw HPMC nrog dej:
Ua raws cov kauj ruam no rau cov txheej txheem sib xyaw ua ke:
Kauj ruam 1: Ntsuas cov dej:
Pib los ntsuas qhov dej uas yuav tsum tau ua. Dej kub cuam tshuam cov nqi, yog li chav chav sov tau pom zoo rau cov ntawv thov feem ntau.
Kauj ruam 2: Ntxiv HPMC maj mam:
Maj mam ntxiv cov nyiaj tau ua ntej HPMC mus rau hauv dej thaum nplawm tsis tu ncua. Nws yog qhov tseem ceeb kom tsis txhob muaj clumping, yog li ntxiv maj mam yuav pab ua kom ua tiav cov kev daws teeb meem.
Kauj ruam 3: do thiab disperse:
Tom qab ntxiv HPMC, txuas ntxiv tshem cov sib tov siv cov khoom siv sib xyaw. Siab shear nws cov khoom siv lossis cov tshuab sib xyaw yog feem ntau siv los xyuas kom meej dispersion.
Kauj ruam 4: Tso cai rau dej:
Cia HPMC kom muaj hydleing tag nrho. Cov txheej txheem no yuav siv qee lub sijhawm thiab yuav tsum tau muab khi kom tiv thaiv clumping thiab ua kom muaj dej.
KAUJ RUAM 5: Kho PH yog tias tsim nyog:
Nyob ntawm daim ntawv thov, E ntawm HPMC kev daws teeb meem yuav xav tau hloov kho. Rau kev taw qhia ntawm PH kev hloov kho, saib cov khoom lag luam cov khoom lag luam lossis tsim cov lus qhia.
Kauj Ruam 6: Lim (yeem):
Muaj qee kis, ib qho ruam feem pom yuav tsum tau tshem tawm cov khoom tsis muaj txiaj ntsig lossis tsis txaus ntseeg. Cov kauj ruam no yog daim ntawv thov nyob ntawm seb yog tsis tau.
Kauj Ruam 7: Tswj Xyuas Zoo:
Ua cov tshev hluav taws zoo kom ntseeg tau HPMC daws teeb meem raws li cov cai. Cov tsis muaj xws li viscosity, transparency, thiab pH tuaj yeem ntsuas kom paub qhov zoo ntawm kev daws.
KAUJ RUAM 8: KHW THIAB SIV:
Thaum cov tshuaj HPMC yog npaj thiab tshuaj xyuas zoo, khaws nws nyob rau hauv ib lub thawv ntim khoom uas tsim nyog. Siv cov tshuaj no raws li cov lus qhia kev cai lij choj tshwj xeeb.
6. Cov lus qhia rau kev sib tsoo sib xyaw:
Do zog: Do tau xwm yeem thiab ua kom huv si hauv cov txheej txheem sib xyaw kom tiv thaiv clumping thiab xyuas kom meej.
Zam kev ua pa tawm: txo qis cua nkag thaum sib tov thaum sib xyaw ua ke ua pa npuas tuaj yeem cuam tshuam kev ua haujlwm ntawm HPMC cov kev daws teeb meem.
Cov dej kub tshaj plaws: thaum chav tsev kub yog feem ntau haum, qee cov ntawv thov yuav tau txais txiaj ntsig los ntawm cov dej sov kom ua kom cov txheej txheem sib cais.
Ntxiv maj mam: ntxiv hpmc maj mam pab tiv thaiv kom txhob muaj clumping thiab txhawb nqa cov kev sib cais zoo dua.
PH.rhaum: Yog tias daim ntawv thov yuav tsum muaj cov pheeb suab tshwj xeeb, kho cov ntawv kom haum rau tom qab HPMC yog kev tawg tag nrho.
Kev tswj hwm zoo: Kev tswj cov tshev kom tsis tu ncua tau ua kom ntseeg tau tias muaj kev sib xws thiab kev ua tau zoo ntawm HPMC.
7. Cov lus nquag nug thiab cov kev daws teeb meem:
Caking: Yog tias noj thaum sib xyaw, thov txo tus HPMC ntxiv, nce stirring, lossis siv ntau cov khoom siv sib xyaw.
HPMC tsis txaus: Yog tias HPMC tsis yog tshuaj hydrated tag nrho, txuas ntxiv lub sijhawm sib xyaw los yog me ntsis nce cov dej kub.
Cov ntawv thov PHH-rau cov ntawv thov pH-rhiab, ua tib zoo kho pH tom qab kev siv cov kua qaub uas tsim nyog lossis puag.
Viscosity hloov: Ua kom muaj kev ntsuas yog ntawm cov dej thiab HPMC kom ua tiav xav tau viscosity. Yog tias tsim nyog, kho cov kev pom zoo kom haum.
Sib tov hydroxypropyl methylcellose nrog dej yog ib qib tseem ceeb hauv ntau cov txheej txheem kev muaj. Nkag siab txog cov khoom ntawm HPMC, xaiv cov qib raug thiab ua raws li cov txheej txheem sib xyaw ua ke yog qhov tseem ceeb kom ua tiav cov txiaj ntsig kev ua tau zoo. Los ntawm kev them nyiaj rau cov ntsiab lus xws li dej thiab kev tswj hwm kev tsim kho, cov chaw tsim khoom siv tau ntawm HPMC hauv cov ntawv thov xws li cov ntaub ntawv siv cov ntaub ntawv.
Lub Sijhawm Post: Jan-11-2024