Hloov dej soluble cellulose ethers rau daim ntawv

Hloov dej-soluble cellulose ethers, xws liHydroxypropyl Methylcellulose(HPMC) los yog Carboxymethyl Cellulose (CMC), rau hauv daim ntawv muaj cov txheej txheem uas feem ntau suav nrog cov kauj ruam hauv qab no. Cov txheej txheem tshwj xeeb yuav txawv nyob ntawm daim ntawv thov thiab cov yam ntxwv ntawm cov nplooj ntawv xav tau.

Cov kauj ruam rau kev hloov dej-soluble cellulose Ethers rau daim ntawv:

1. Kev npaj ntawm Cellulose Ether Solution:
   • Dissolve cov dej-soluble cellulose ether nyob rau hauv dej los npaj ib homogeneous tov.
   • Kho qhov concentration ntawm cellulose ether nyob rau hauv kev daws raws li qhov xav tau ntawm cov nplooj ntawv.
2. Additives (Yeem):
   • Ntxiv cov additives uas yuav tsum tau muaj, xws li plasticizers, fillers, los yog reinforcing agents, los hloov cov khoom ntawm cov nplooj ntawv. Plasticizers, piv txwv li, tuaj yeem txhim kho kev yooj yim.
3. Kev sib xyaw thiab homogenization:
   • Sib tov cov tshuaj kom huv si kom ntseeg tau tias muaj kev sib faib ntawm cellulose ether thiab additives.
   • Homogenize qhov sib tov kom tawg tag nrho cov aggregates thiab txhim kho qhov sib xws ntawm cov tshuaj.
4. Casting los yog Txheej:
   • Siv cov txheej txheem casting los yog txheej txheej los siv cov tshuaj cellulose ether rau hauv substrate.
   • Cov substrates tuaj yeem suav nrog iav daim hlau, tso cov ntaub, lossis lwm yam khoom siv nyob ntawm daim ntawv thov.
5. Tus kws kho mob Hniav lossis Spreader:
   • Siv tus kws kho mob hniav los yog cov khoom siv los tswj cov tuab ntawm cov tshuaj cellulose ether.
   • Cov kauj ruam no pab ua kom tiav ib qho kev sib xws thiab tswj cov thickness rau cov ntawv txheeb.
6. Kev ziab:
   • Cia lub coated substrate kom qhuav. Txoj kev ziab tuaj yeem suav nrog huab cua kom qhuav, qhov cub kom qhuav, lossis lwm yam kev ua kom qhuav.
   • Cov txheej txheem ziab kom tshem tawm cov dej thiab ua kom cov cellulose ether, ua ib daim ntawv.
7. Txiav los yog Shaping:
   • Tom qab ziab, txiav los yog tsim cov cellulose ether-coated substrate rau hauv daim ntawv xav tau loj thiab daim ntawv.
   • Kev txiav tuaj yeem ua tiav siv cov hniav, tuag, lossis lwm yam khoom siv txiav.
8. Kev Tswj Xyuas Zoo:
   • Ua cov kev tswj xyuas zoo kom ntseeg tau tias cov nplooj ntawv ua tau raws li qhov xav tau tshwj xeeb, suav nrog thickness, yooj, thiab lwm yam khoom muaj feem xyuam.
   • Kev ntsuam xyuas yuav suav nrog kev tshuaj xyuas qhov muag, ntsuas, thiab lwm yam txheej txheem kev pov hwm zoo.
9. Ntim:
   • Ntim cov nplooj ntawv nyob rau hauv ib txoj kev uas tiv thaiv lawv los ntawm ya raws thiab lwm yam.
   • Daim ntawv lo thiab cov ntaub ntawv tuaj yeem suav nrog rau kev txheeb xyuas cov khoom.

Kev txiav txim siab:

• Plasticization: Yog tias qhov yooj yim yog qhov tseem ceeb, cov yas zoo li glycerol yuav raug ntxiv rau cov tshuaj cellulose ether ua ntej casting.
• Drying Conditions: Kev ziab kom zoo yog qhov tseem ceeb kom tsis txhob ziab tsis sib xws thiab ua rau cov nplooj ntawv tsis sib xws.
• Environmental Conditions: Cov txheej txheem yuav raug cuam tshuam los ntawm ib puag ncig xws li kub thiab av noo.

Cov txheej txheem dav dav no tuaj yeem hloov kho raws li cov cai tshwj xeeb ntawm daim ntawv thov, txawm tias nws yog rau cov yeeb yaj kiab tshuaj, ntim khoom noj, lossis lwm yam kev siv. Kev xaiv ntawm cellulose ether hom thiab formulation parameters kuj yuav cuam tshuam cov khoom ntawm cov ntawv txheeb.