Hydroxypropyl methylcellulose (HPMC) yog cov khoom siv polymer dav siv hauv cov khoom siv hauv tsev, tshwj xeeb tshaj yog cov nplaum nplaum. HPMC yog ib qho uas tsis yog-ionic cellulose ether tsim los ntawm chemically modified natural cellulose, nrog zoo thickening, dej tuav, bonding, film-forming, ncua kev kawm ntawv thiab lubrication zog. Cov khoom no ua rau nws ua lub luag haujlwm tseem ceeb hauv cov nplais nplaum, txhim kho kev ua tau zoo thiab kev tsim kho ntawm cov khoom.
1. Thickening nyhuv
Ib qho ntawm lub luag haujlwm tseem ceeb ntawm HPMC hauv cov nplais nplaum yog thickening. Cov nyhuv thickening tso cai rau qhov sib xws ntawm cov nplaum ua kom zoo dua qub, kom nws tuaj yeem ua tau zoo dua rau ntawm phab ntsa lossis hauv av thaum siv. HPMC tsub kom cov viscosity ntawm cov nplaum los ntawm kev yaj hauv dej los tsim cov tshuaj colloidal. Qhov no tsis tsuas yog pab txhim kho kev tswj cov dej ntws ntawm cov nplaum rau ntawm qhov chaw ntsug, tab sis tseem tiv thaiv cov vuas los ntawm kev swb thaum tso. Tsis tas li ntawd, qhov tsim nyog sib xws tuaj yeem ua kom cov neeg ua haujlwm tsim kho tau yooj yim dua thaum siv, txhim kho kev tsim kho kom zoo thiab ua haujlwm zoo.
2. Dej tuav nyhuv
HPMC muaj cov khoom tuav dej zoo, uas yog qhov tseem ceeb tshwj xeeb hauv kev siv cov nplais nplaum. Kev tuav dej yog hais txog lub peev xwm ntawm HPMC kom khaws cov dej noo hauv cov nplaum, tiv thaiv cov nplaum los ntawm kev ziab sai heev vim tias cov dej noo ntau dhau thaum tsim kho. Yog tias cov nplaum poob dej sai dhau, nws yuav ua rau muaj kev sib txuas tsis txaus, txo lub zog, thiab txawm tias muaj teeb meem zoo xws li hollowing thiab ntog. Los ntawm kev siv HPMC, cov dej noo hauv cov nplaum tuaj yeem khaws cia rau lub sijhawm ntev, yog li ua kom ruaj khov thiab ruaj khov ntawm cov vuas tom qab pasting. Tsis tas li ntawd, kev tuav dej kuj tseem tuaj yeem txuas ntxiv lub sijhawm qhib ntawm cov nplaum, muab cov neeg ua haujlwm tsim kho ntau lub sijhawm los kho thiab ua haujlwm.
3. Txhim kho kev tsim kho kev ua haujlwm
Lub xub ntiag ntawm HPMC kuj tseem tuaj yeem txhim kho kev tsim kho ntawm cov nplais nplaum nplaum. Tshwj xeeb, nws yog manifested nyob rau hauv cov nram qab no yam:
Kev ua haujlwm tau zoo: HPMC txhim kho cov nplaum nplaum, ua kom yooj yim rau kev thov thiab sib kis. Qhov kev txhim kho ntawm cov dej ntws no tso cai rau cov nplaum nplaum kom sib npaug ntau dua thaum tso cov vuas, yog li tsis txhob muaj qhov sib txawv thiab txhim kho cov nyhuv paving.
Anti-slip: Thaum lub sij hawm tsim kho phab ntsa, HPMC tuaj yeem tiv thaiv cov vuas los ntawm kev zawv zawg vim yog lub ntiajteb txawj nqus tom qab tso. Cov cuab yeej tiv thaiv no yog qhov tseem ceeb tshwj xeeb rau cov vuas loj lossis hnyav, kom ntseeg tau tias cov vuas nyob hauv qhov chaw ua ntej kho, zam kev tsis sib xws lossis tsis sib xws.
Wettability: HPMC muaj qhov ntub dej zoo, uas tuaj yeem txhawb kev sib raug zoo ntawm cov nplaum thiab sab nraub qaum ntawm cov pobzeb thiab qhov chaw ntawm lub substrate, txhim kho nws cov adhesion. Qhov no wettability kuj tuaj yeem txo qhov tshwm sim ntawm hollowing thiab txhim kho tag nrho kev sib raug zoo.
4. Txhim kho adhesion thiab tawg tsis kam
Daim ntawv thov ntawm HPMC hauv cov nplais nplaum tuaj yeem txhim kho adhesion thiab ua kom muaj kev sib raug zoo ntawm cov vuas thiab cov substrates muaj zog. Cov cuab yeej ua yeeb yaj kiab ntawm HPMC yuav tsim cov yeeb yaj kiab tawv tom qab ziab, uas tuaj yeem tiv taus qhov cuam tshuam ntawm ib puag ncig sab nraud, xws li kub hloov pauv, av noo hloov pauv, thiab lwm yam, yog li txhim kho qhov tawg tsis kam ntawm cov nplaum. Tsis tas li ntawd, qhov yooj yim muab los ntawm HPMC ua rau cov nplaum nplaum kom muaj zog ntawm kev sib koom ua ke nyob rau hauv me ntsis deformation, tsis txhob muaj teeb meem tawg los ntawm kev ntxhov siab.
5. Txhim kho khov-thaw tsis kam
Hauv qee qhov chaw txias, cov nplais nplaum yuav tsum muaj qee qhov kev tiv thaiv khov-thaw tiv thaiv kom tsis txhob muaj kev puas tsuaj rau cov txheej txheem vim qhov kub hloov pauv. Daim ntawv thov ntawm HPMC tuaj yeem txhim kho qhov khov-thaw tsis kam ntawm cov nplaum rau qee qhov thiab txo qhov kev pheej hmoo ntawm kev puas tsuaj los ntawm khov thiab thawing mus. Qhov no yog vim HPMC muaj qee qhov kev hloov pauv hauv cov txheej txheem nplaum nplaum, uas tuaj yeem nqus tau qhov kev ntxhov siab los ntawm kev hloov kub, yog li tiv thaiv kev ncaj ncees ntawm cov nplaum txheej.
6. Kev tiv thaiv kev lag luam thiab ib puag ncig
HPMC, raws li ib tug natural cellulose derivative, muaj biodegradability zoo thiab kev tiv thaiv ib puag ncig. Kev siv HPMC hauv cov nplais nplaum tuaj yeem txo qis cov tshuaj ntxiv, yog li txo qhov cuam tshuam rau ib puag ncig. Tsis tas li ntawd, kev siv HPMC kuj tseem tuaj yeem txhim kho tus nqi-zoo ntawm cov nplaum nplaum, thiab txo cov khoom pov tseg thiab cov nqi rov ua dua thaum lub sij hawm tsim kho los ntawm kev txhim kho kev ua haujlwm ntawm cov nplaum.
Xaus
Hydroxypropyl methylcellulose (HPMC) plays lub luag haujlwm tseem ceeb hauv cov nplaum nplaum. Nws thickening, dej tuav, txhim kho kev tsim kho kev ua tau zoo, txhim kho adhesion thiab tawg tsis kam thiab lwm yam kev ua tau zoo txhim kho tag nrho kev ua tau zoo ntawm cov nplais nplaum. Qhov no tsis tsuas yog pab txhim kho kev tsim kho kom zoo, tab sis kuj ua rau lub neej ua haujlwm ntev ntawm cov tsev. Nrog kev txhim kho txuas ntxiv ntawm thev naus laus zis thiab kev txhim kho ntawm kev tiv thaiv ib puag ncig, daim ntawv thov kev cia siab ntawm HPMC hauv cov khoom siv hauv tsev yuav dav dua.
Post lub sij hawm: Sep-03-2024