Hydroxypropyl methylcellulose (HPMC) txoj kev sib cais:

Thaum cov khoom siv hydroxypropyl methylcellulose (HPMC) ncaj qha ntxiv rau dej, lawv yuav coagulate thiab tom qab ntawd yaj, tab sis qhov kev sib cais no qeeb heev thiab nyuaj. Muaj peb txoj hauv kev kom tshem tawm hauv qab no, thiab cov neeg siv tuaj yeem xaiv txoj kev yooj yim tshaj plaws raws li lawv cov kev siv:

1. Cov txheej txheem dej kub: Txij li thaum hydroxypropyl methylcellulose (HPMC) tsis yaj hauv dej kub, thawj theem ntawm hydroxypropyl methylcellulose (HPMC) tuaj yeem sib npaug ntawm cov dej kub, thiab tom qab ntawd thaum nws txias, peb Ib txoj kev raug piav qhia raws li raws li nram no:

1). Muab cov dej kub uas xav tau rau hauv lub thawv thiab ua kom kub li 70 ° C. Maj mam ntxiv hydroxypropyl methylcellulose (HPMC) nyob rau hauv qeeb stirring, lub hydroxypropyl methylcellulose (HPMC) pib ntab rau saum npoo dej, thiab tom qab ntawd maj mam tsim cov slurry, txias cov slurry nyob rau hauv stirring.

2). Tshav kub 1/3 lossis 2/3 (yuav tsum tau) cov dej hauv lub thawv thiab kub rau 70 ° C. Raws li txoj kev ntawm 1), disperse hydroxypropyl methylcellulose (HPMC) los npaj cov dej kub slurry; Tom qab ntawd ntxiv cov dej txias los yog dej khov rau hauv lub thawv, tom qab ntawd ntxiv cov dej kub uas hais saum toj no hydroxypropyl methylcellulose (HPMC) slurry rau cov dej txias, thiab do, ces txias qhov sib tov.

3). Ntxiv 1/3 los yog 2/3 ntawm cov dej xav tau rau hauv lub thawv thiab kub rau 70 ° C. Raws li txoj kev ntawm 1), disperse hydroxypropyl methylcellulose (HPMC) los npaj cov dej kub slurry; Tom qab ntawd cov dej txias los yog dej khov ntxiv ntxiv rau cov dej kub slurry thiab qhov sib tov yog txias tom qab nplawm.

2. Powder mixing method: hydroxypropyl methylcellulose (HPMC) hmoov cov khoom thiab qhov sib npaug lossis ntau dua ntawm lwm cov khoom xyaw hmoov tau tawg tag nrho los ntawm kev sib xyaw qhuav, thiab tom qab ntawd yaj hauv dej, ces hydroxypropyl methylcellulose Base cellulose (HPMC) tuaj yeem yaj yam tsis muaj agglomeration. . 3. Organic solvent wetting method: pre-disperse los yog ntub hydroxypropyl methylcellulose (HPMC) nrog cov organic solvents xws li ethanol, ethylene glycol lossis roj, thiab tom qab ntawd yaj hauv dej. Nyob rau lub sijhawm no, hydroxypropyl methylcellulose (HPMC) tuaj yeem yaj tau zoo.