1 Cov kev siv tseem ceeb ntawm cellulose ether HPMC yog dab tsi?
HPMC siv dav hauv cov tshuaj mortar siv rau kev tsim kho, xim pleev xim dej, cov roj hmab siv ua vaj tse, tshuaj, khoom noj, textile, tshuaj pleev ib ce, luam yeeb, thiab lwm yam lag luam. Nws muab faib ua qib siv rau kev tsim kho, qib khoom noj, qib tshuaj, qib PVC kev lag luam thiab qib tshuaj lom neeg txhua hnub.
2 Cov kev faib tawm ntawm cellulose yog dab tsi?
Cov celluloses feem ntau yog MC, HPMC, MHEC, CMC, HEC, EC
Ntawm lawv, HEC thiab CMC feem ntau yog siv rau hauv cov txheej txheem dej;
CMC kuj tseem siv tau rau hauv cov khoom siv av nplaum, cov roj av, cov khoom noj thiab lwm yam teb;
EC feem ntau yog siv rau hauv tshuaj, hluav taws xob nyiaj nplaum thiab lwm yam teb;
HPMC muab faib ua ntau yam kev qhia tshwj xeeb thiab siv rau hauv cov tshuaj khib, tshuaj, khoom noj, PVC kev lag luam, cov khoom siv tshuaj txhua hnub thiab lwm yam lag luam.
3Qhov txawv ntawm HPMC thiab MHEC hauv daim ntawv thov yog dab tsi?
Cov yam ntxwv ntawm ob hom cellulose yeej zoo ib yam, tab sis qhov ruaj khov ntawm qhov kub siab ntawm MHEC zoo dua, tshwj xeeb tshaj yog thaum lub caij ntuj sov thaum qhov kub ntawm phab ntsa siab, thiab kev ua haujlwm khaws dej ntawm MHEC zoo dua li HPMC nyob rau hauv qhov kub siab.
4 Yuav ua li cas thiaj txiav txim tau qhov zoo ntawm HPMC?
1) Txawm hais tias qhov dawb tsis tuaj yeem txiav txim siab seb HPMC puas yooj yim siv, thiab yog tias cov neeg sawv cev dawb ntxiv rau hauv cov txheej txheem ntau lawm, qhov zoo yuav raug cuam tshuam, tab sis feem ntau ntawm cov khoom zoo muaj qhov dawb zoo, uas tuaj yeem txiav txim siab los ntawm qhov tsos.
2) Kev xa hluav taws xob: Tom qab yaj HPMC hauv dej kom ua rau cov pob tshab, saib nws qhov kev xa hluav taws xob. Qhov zoo dua qhov kev xa hluav taws xob, qhov tsawg dua cov khoom tsis yaj, thiab qhov zoo kuj zoo.
Yog tias koj xav txiav txim siab qhov zoo ntawm cellulose kom raug, txoj hauv kev txhim khu kev qha tshaj plaws yog siv cov khoom siv tshaj lij hauv chav kuaj mob tshaj lij los kuaj. Cov ntsuas tseem ceeb ntawm kev kuaj suav nrog viscosity, dej khaws cia tus nqi, thiab tshauv.
5 Txoj kev kuaj pom viscosity ntawm cellulose?
Lub viscometer feem ntau hauv kev lag luam cellulose hauv tebchaws yog NDJ, tab sis hauv kev lag luam thoob ntiaj teb, cov chaw tsim khoom sib txawv feem ntau siv cov txheej txheem kuaj viscosity sib txawv. Cov feem ntau yog Brookfeild RV, Hoppler, thiab kuj tseem muaj cov kev daws teeb meem sib txawv, uas muab faib ua 1% kev daws teeb meem thiab 2% kev daws teeb meem. Cov viscometers sib txawv thiab cov txheej txheem kuaj pom sib txawv feem ntau ua rau muaj qhov sib txawv ntawm ntau zaus lossis txawm tias ntau kaum zaus hauv cov txiaj ntsig viscosity.
6 Qhov txawv ntawm HPMC hom tam sim ntawd thiab hom kub yaj yog dab tsi?
Cov khoom lag luam tam sim ntawd ntawm HPMC yog hais txog cov khoom uas tawg sai sai hauv dej txias, tab sis yuav tsum nco ntsoov tias kev tawg tsis txhais tau tias yuav yaj. Cov khoom lag luam tam sim ntawd raug kho nrog glyoxal ntawm qhov chaw thiab tawg hauv dej txias, tab sis lawv tsis pib yaj tam sim ntawd. , yog li qhov viscosity tsis tsim tam sim ntawd tom qab tawg. Qhov ntau dua ntawm kev kho qhov chaw glyoxal, qhov ceev dua qhov kev tawg, tab sis qhov qeeb dua qhov viscosity, qhov me dua ntawm glyoxal, thiab vice versa.
7 cov cellulose sib xyaw thiab cov cellulose hloov kho
Tam sim no muaj ntau cov cellulose hloov kho thiab cov cellulose sib xyaw ua ke hauv khw, yog li kev hloov kho thiab cov khoom sib xyaw yog dab tsi?
Hom cellulose no feem ntau muaj cov khoom uas cov cellulose qub tsis muaj lossis txhim kho qee yam ntawm nws cov khoom, xws li: tiv thaiv kev plam, txhim kho lub sijhawm qhib, nce thaj chaw khawb kom txhim kho kev tsim kho, thiab lwm yam. Txawm li cas los xij, nws yuav tsum tau sau tseg tias ntau lub tuam txhab kuj siv Cov cellulose pheej yig uas nws ua rau kom txo cov nqi hu ua compound cellulose lossis hloov kho cellulose. Ua tus neeg siv khoom, sim paub qhov txawv thiab tsis txhob raug dag. Nws yog qhov zoo tshaj plaws los xaiv cov khoom lag luam txhim khu kev qha los ntawm cov hom loj thiab cov chaw tsim khoom loj.
Lub sijhawm tshaj tawm: Lub Kaum Ob Hlis-23-2022