1. Taw qhia rau Hydroxypropyl Methylcellulose (HPMC)
Hydroxypropyl Methylcellulose (HPMC)yog ib qho non-ionic cellulose ether ua los ntawm ntuj paj rwb fiber ntau los yog ntoo pulp los ntawm kev hloov tshuaj. HPMC muaj dej solubility zoo, thickening, stability, film-forming zog thiab biocompatibility, yog li nws yog dav siv nyob rau hauv kev tsim kho, tshuaj, khoom noj khoom haus, tshuaj txhua hnub thiab lwm yam teb.
2. Cov kauj ruam ntau lawm ntawm HPMC
Kev tsim khoom ntawm HPMC feem ntau suav nrog cov kauj ruam tseem ceeb hauv qab no:
Raw khoom npaj
Lub ntsiab raw khoom ntawm HPMC yog high-purity natural cellulose (feem ntau yog los ntawm paj rwb los yog ntoo pulp), uas yuav tsum tau kho ua ntej kom tshem tawm impurities thiab xyuas kom meej lub purity thiab uniformity ntawm cellulose.
Kev kho alkalinization
Muab cov cellulose tso rau hauv lub reactor thiab ntxiv qhov tsim nyog ntawm sodium hydroxide (NaOH) tov kom o ntawm cellulose nyob rau hauv ib qho chaw alkaline los tsim alkali cellulose. Cov txheej txheem no tuaj yeem ua rau muaj kev ua haujlwm ntawm cellulose thiab npaj rau cov tshuaj tiv thaiv etherification tom ntej.
Etherification cov tshuaj tiv thaiv
Raws li alkali cellulose, methylating agents (xws li methyl chloride) thiab hydroxypropylating agents (xws li propylene oxide) tau qhia los ua cov tshuaj tiv thaiv etherification. Cov tshuaj tiv thaiv feem ntau yog ua nyob rau hauv lub kaw high-pressure reactor. Ntawm qhov kub thiab txias, cov pawg hydroxyl ntawm cov cellulose yog hloov los ntawm methyl thiab hydroxypropyl pawg los tsim hydroxypropyl methylcellulose.
Neutralization ntxuav
Tom qab cov tshuaj tiv thaiv, cov khoom yuav muaj unreacted chemical reagents thiab by-products, yog li nws yog tsim nyog los ntxiv ib tug acid tov rau neutralization kev kho mob, thiab ces ntxuav nrog ib tug loj npaum li cas ntawm cov dej los yog organic hnyav kom tshem tawm cov residual alkaline tshuaj thiab impurities.
Lub cev qhuav dej thiab ziab
Cov tshuaj HPMC ntxuav yog centrifuged los yog lim kom tshem tawm cov dej ntau dhau, thiab tom qab ntawd cov tshuab ziab khaub ncaws qis yog siv los ua cov hmoov qhuav los yog flakes los tswj lub cev thiab tshuaj lom neeg ntawm HPMC.
Sib tsoo thiab tshuaj ntsuam
Lub tshuab ziab khaub ncaws HPMC raug xa mus rau cov cuab yeej sib tsoo rau kev sib tsoo kom tau HPMC hmoov ntawm ntau qhov sib txawv. Tom qab ntawd, kev tshuaj xyuas thiab kev muab qhab nia yog ua los xyuas kom meej qhov sib xws ntawm cov khoom kom tau raws li cov kev thov sib txawv.
Ntim thiab khaws cia
Tom qab kev soj ntsuam zoo, cov khoom kawg tau ntim raws li kev siv sib txawv (xws li 25kg / hnab) thiab khaws cia rau hauv qhov chaw qhuav thiab qhov cua kom tsis txhob ya raws lossis paug.
3. Cov chaw thov tseem ceeb ntawm HPMC
Vim nws cov thickening zoo, film-forming, dej-retaining, emulsifying thiab biocompatibility zog, HPMC tau dav siv nyob rau hauv ntau industries:
Kev tsim kho kev lag luam
HPMC yog ib qho tseem ceeb ntxiv rau cov khoom siv hauv tsev, feem ntau yog siv rau:
Cement mortar: txhim khu kev tsim kho fluidity, txhim kho adhesion, thiab tiv thaiv dej ntau dhau.
Pobzeb nplaum: ua kom cov dej tuav ntawm cov nplais nplaum thiab txhim kho kev tsim kho.
Cov khoom siv gypsum: txhim kho kev ua haujlwm tawg thiab kev tsim kho.
Putty hmoov: txhim kho adhesion, tawg tsis kam thiab muaj peev xwm tiv thaiv sagging.
Self-leveling pem teb: txhim khu fluidity, hnav tsis kam thiab stability.
Kev lag luam kws tshuaj
HPMC yog dav siv nyob rau hauv kws tshuaj raws li:
Txheej thiab zaj duab xis-forming tus neeg saib xyuas rau cov tshuaj ntsiav tshuaj: txhim kho tshuaj stability thiab tswj cov tshuaj tso tawm tus nqi.
Sustained-tso thiab tswj-tso npaj: siv nyob rau hauv sustained-tso ntsiav tshuaj thiab tswj-tso capsule plhaub los tswj cov tshuaj tso tawm.
Capsule hloov: siv nyob rau hauv kev tsim cov neeg tsis noj nqaij capsules ( zaub capsules).
4. Kev lag luam zaub mov
HPMC yog siv los ua zaub mov ntxiv rau:
Thickener thiab emulsifier: siv rau hauv cov khoom ci, jellies, kua ntses, thiab lwm yam.
Stabilizer: siv hauv cov dej khov thiab cov khoom noj siv mis los tiv thaiv cov protein los nag.
Khoom noj neeg tsis noj nqaij: siv los ua cov thickener rau cov khoom noj cog qoob loo los hloov cov tsiaj stabilizers xws li gelatin.
Kev lag luam tshuaj txhua hnub
HPMC yog cov khoom tseem ceeb hauv cov tshuaj pleev ib ce thiab cov khoom tu tus kheej:
Cov khoom tu tawv nqaij: siv rau hauv cov tshuaj pleev ib ce, lub ntsej muag lub ntsej muag, thiab lwm yam los muab moisturizing thiab ruaj khov.
Tshuaj zawv plaub hau thiab da dej gel: ua kom cov npuas ruaj khov thiab txhim kho viscosity.
Cov tshuaj txhuam hniav: siv los ua cov thickener thiab moisturizer los txhim kho saj.
Xim thiab inks
HPMC muaj cov cuab yeej ua yeeb yaj kiab zoo thiab kev ncua kev ruaj ntseg thiab tuaj yeem siv rau:
Latex xim: txhim kho kev txhuam thiab rheology ntawm cov xim thiab tiv thaiv nag lossis daus.
Ink: Txhim kho rheology thiab txhim kho kev luam ntawv zoo.
Lwm daim ntawv thov
HPMC kuj tseem siv tau rau:
Ceramic kev lag luam: Raws li ib tug binder, txhim kho lub zog ntawm ceramic blanks.
Kev Ua Liaj Ua Teb: Siv cov tshuaj tua kab tua kab thiab cov noob txheej los txhim kho kev ruaj ntseg ntawm tus neeg sawv cev.
Papermaking kev lag luam: Raws li tus neeg sawv cev sizing, txhim kho cov dej tsis kam thiab luam ntawv ntawm daim ntawv.
HPMCyog cov khoom siv ua haujlwm zoo polymer, dav siv hauv kev tsim kho, tshuaj, khoom noj, tshuaj niaj hnub, txheej thiab lwm yam lag luam. Nws cov txheej txheem ntau lawm suav nrog cov khoom siv raw pretreatment, alkalization, etherification, ntxuav, ziab, sib tsoo thiab lwm yam, txhua qhov txuas cuam tshuam qhov zoo ntawm cov khoom kawg. Nrog rau kev txhim kho ntawm kev tiv thaiv ib puag ncig thiab kev loj hlob ntawm kev lag luam xav tau, cov cuab yeej tsim khoom ntawm HPMC kuj tau ua kom zoo kom tau raws li cov kev xav tau ntawm kev lag luam ntau dua.
Lub sij hawm xa tuaj: Mar-25-2025