Hydroxypropyl Methyl Cellulose (HPMC, Hydroxypropyl Methyl Cellulose) yog cov khoom siv polymer dav siv hauv cov hmoov putty. Nws muaj dej solubility zoo, adhesion, dej tuav, thickening, zaj duab xis-forming thiab lubrication, yog li nws plays lub luag hauj lwm tseem ceeb hauv putty hmoov.
1. Kev tuav dej
Ib qho ntawm cov haujlwm tseem ceeb tshaj plaws ntawm HPMC hauv cov hmoov putty yog muab cov dej tuav tau zoo. Putty hmoov dries tom qab daim ntawv thov, thaum HPMC khaws cov dej noo thiab ua kom lub sij hawm kom qhuav. Cov yam ntxwv no tso cai rau cov hmoov putty muaj lub sijhawm ua haujlwm ntev dua thaum lub sijhawm kho, uas muaj txiaj ntsig zoo rau kev tsim kho. Kev tuav dej kuj tseem tiv thaiv kev tawg ntawm cov txheej txheej putty, txhim kho lub zog thiab ruaj khov ntawm cov khoom tiav.
2. Thickening
Raws li tus neeg sawv cev thickening, HPMC tuaj yeem ua kom cov viscosity ntawm putty hmoov, ua rau cov hmoov putty ntau plump thiab txawm tias thaum siv. Nws tuaj yeem kho qhov sib xws ntawm cov hmoov putty kom tsis txhob muaj cov khoom sagging thiab kev tsim kho teeb meem, yog li xyuas kom meej tias cov hmoov putty tuaj yeem sib npaug ntawm phab ntsa tsis ntws, txhim kho kev tsim kho kom zoo.
3. Film-forming zog
Cov yeeb yaj kiab tsim los ntawm HPMC thaum lub sijhawm ziab tuaj yeem ua rau lub zog saum npoo thiab ua haujlwm ntev ntawm cov hmoov putty. Film-forming zog yog ib qho tseem ceeb ntawm cov hmoov putty muaj peev xwm tiv thaiv tawg thiab hnav. Cov qauv zaj duab xis no tuaj yeem tsis tsuas yog tiv thaiv cov kab nrib pleb ntawm cov txheej txheej putty, tab sis kuj txhim khu kev tiv thaiv ntawm putty txheej rau ib puag ncig, xws li UV tsis kam thiab ya raws.
4. Lubricity
HPMC muaj lubricity zoo thiab pab txhim kho kev tsim kho ntawm putty hmoov. Thaum lub sij hawm sib tov thiab tsim cov txheej txheem ntawm putty hmoov, cov nyhuv lubrication ntawm HPMC ua rau nws yooj yim rau do cov hmoov putty tusyees thiab siv nws smoothly rau ntawm phab ntsa. Qhov no tsis tsuas yog ua rau kev tsim kho yooj yim dua, tab sis kuj txo qhov hnav thiab tsim kua muag ntawm cov cuab yeej tsim kho.
5. Kev ruaj ntseg
HPMC tuaj yeem txhim kho qhov ruaj khov ntawm putty hmoov. Nws tuaj yeem tiv thaiv putty hmoov los ntawm kev daws teeb meem, agglomerating thiab lwm yam teeb meem thaum lub sij hawm cia thiab ua kom lub sij hawm ntev ntawm cov khoom. Cov nyhuv stabilizing ntawm HPMC tiv thaiv cov hmoov putty los ntawm kev nplawm ntau zaus ua ntej siv thiab tswj cov khoom zoo.
6. Txhim kho kev ua haujlwm tiv thaiv plam
Thaum tsim cov phab ntsa ntsug, yog tias cov hmoov putty tsis muaj cov khoom zoo los tiv thaiv plam, nws yooj yim rau sagging thiab sagging. Lub adhesion thiab thickening los ntawm HPMC ho txhim kho lub anti-slip kev ua tau zoo ntawm putty hmoov, kom ntseeg tau tias cov khoom yuav tsum tau ruaj khov txuas mus rau phab ntsa los tsim ib tug ca, du nto.
7. Txhim khu kev tsim kho
Lub neej ntawm HPMC ua rau cov hmoov putty yooj yim rau kev tsim, txo cov adhesion ntawm cov cuab yeej, thiab txhim kho kev tsim kho. Nws tuaj yeem ua rau cov hmoov putty tsis tuaj yeem ua raws li cov cuab yeej siv thaum lub sijhawm tsim kho, txo qhov kev tiv thaiv thaum thov, thiab txhim kho kev nplij siab thiab kev ua haujlwm ntawm kev tsim kho.
8. Kho cov sij hawm qhib
HPMC tuaj yeem kho lub sijhawm qhib ntawm cov hmoov putty. Lub sijhawm qhib yog hais txog lub sijhawm uas cov hmoov putty tuaj yeem hloov kho thiab txiav tom qab kev tsim kho. Los ntawm kev tswj hwm tus nqi ntawm HPMC ntxiv, lub sijhawm qhib ntawm cov hmoov putty tuaj yeem tsim nyog txuas ntxiv lossis luv luv kom haum rau cov kev xav tau sib txawv.
9. Txhim khu kev ua haujlwm tawg
Vim lub thickening thiab dej tuav cov khoom ntawm HPMC, nws muaj peev xwm tiv thaiv tau cov hmoov putty los ntawm shrinking thiab cracking vim dej ntau dhau thaum lub sij hawm ziab. Nws tuaj yeem muab qhov tsim nyog elasticity, tso cai rau cov qhuav putty txheej los tiv thaiv kev ntxhov siab sab nraud thiab txo qhov tshwm sim ntawm cov kab nrib pleb.
10. Txhim kho huab cua tsis kam
HPMC tuaj yeem txhim kho huab cua tiv thaiv ntawm putty hmoov thiab tiv thaiv kev laus thiab kev puas tsuaj ntawm cov txheej putty nyob rau hauv ib puag ncig hnyav. Vim yog cov khoom tsim cov yeeb yaj kiab thiab kev ruaj ntseg ntawm HPMC, nws tuaj yeem tiv thaiv ultraviolet yaig thiab av noo hloov pauv, ncua kev pab cuam lub neej ntawm cov hmoov putty.
HPMC plays ntau lub luag haujlwm hauv cov hmoov putty. Los ntawm kev tuav dej, thickening, thiab tsim zaj duab xis los txhim kho kev tsim kho thiab txhim kho kev tawg, nws ua lub luag haujlwm tseem ceeb hauv kev ua haujlwm thiab kev tsim kho ntawm cov hmoov putty. Nws daim ntawv thov ua rau cov hmoov putty muaj kev tsim kho zoo dua, ruaj khov thiab kav ntev, muab qhov tseem ceeb lav rau kev tsim kho phab ntsa. Hauv luv luv, HPMC yog ib qho tseem ceeb thiab tseem ceeb ntawm cov hmoov putty thiab ua lub luag haujlwm hloov tsis tau hauv kev txhim kho tag nrho cov kev ua tau zoo ntawm cov hmoov putty.
Post lub sij hawm: Lub Xya hli ntuj-10-2024