Hydroxypropyl methylcellulose (HPMC) yog ntau yam khoom siv dav siv hauv phab ntsa putty hmoov formulations, tshwj xeeb tshaj yog rau kev siv sab hauv tsev thiab sab nraum zoov.
HPMC hmoov qhia:
Txhais thiab muaj pes tsawg leeg:
Hydroxypropyl methylcellulose, hu ua HPMC, yog hloov kho cellulose ether muab los ntawm ntuj cellulose. Nws yog synthesized los ntawm chemically modifying cellulose, complex carbohydrate pom nyob rau hauv cov nroj tsuag cell phab ntsa. Kev hloov kho suav nrog kev qhia txog hydroxypropyl thiab methyl pawg rau hauv cov qauv cellulose, ua rau muaj dej-soluble thiab ntau yam polymer.
Lub cev thiab tshuaj muaj zog:
Solubility: HPMC yog soluble hauv dej, tsim cov tshuaj ntshiab thiab tsis muaj xim. Solubility tuaj yeem hloov kho los ntawm kev hloov pauv qib (DS) thaum lub sijhawm tsim khoom.
Viscosity: HPMC muab cov viscosity tswj thiab zoo ib yam rau cov tshuaj. Cov cuab yeej no yog qhov tseem ceeb hauv kev tsim cov phab ntsa putty vim nws cuam tshuam rau kev ua haujlwm thiab kev siv cov yam ntxwv ntawm cov khoom.
Thermal gelation: HPMC nthuav tawm cov thermal gelation, uas txhais tau tias nws tuaj yeem tsim cov gel thaum cua sov. Cov cuab yeej no muaj txiaj ntsig hauv qee cov ntawv thov uas yuav tsum tau gelling.
Kev siv HPMC hauv phab ntsa putty:
Sab hauv phab ntsa putty:
1. Bonding thiab adhesion:
HPMC txhim kho cov khoom sib txuas ntawm sab hauv phab ntsa putties, kom ntseeg tau zoo dua adhesion rau substrates xws li pob zeb, stucco lossis drywall.
HPMC's modified cellulose qauv tsim ib zaj duab xis nyias ntawm qhov chaw, muab kev ruaj khov thiab ruaj khov.
2. Processability thiab yooj yim ntawm daim ntawv thov:
Lub viscosity tswj ntawm HPMC muab lub putty zoo heev workability, tso cai rau nws mus thov smoothly thiab yooj yim rau sab hauv.
Nws tiv thaiv sagging thiab dripping thaum lub sij hawm daim ntawv thov thiab kom ib tug uniform txheej.
3. Kev tuav dej:
HPMC ua raws li tus neeg sawv cev khaws dej, tiv thaiv cov dej evaporation sai thaum lub sijhawm kho. Qhov no pab txhim kho cov hydration ntawm putty, uas ua rau kev txhim kho lub zog zoo dua.
Sab nrauv phab ntsa putty:
1. Huab cua tsis kam:
HPMC txhim kho huab cua tiv thaiv ntawm sab nrauv phab ntsa putties thiab tiv thaiv kev cuam tshuam ntawm tshav ntuj, nag thiab kub hloov.
Cov yeeb yaj kiab polymer tsim los ntawm HPMC ua raws li kev thaiv, tiv thaiv kev nkag mus ntawm cov dej noo thiab tswj kev ncaj ncees ntawm txheej.
2. Kev tiv thaiv tawg:
Qhov yooj yim ntawm HPMC pab txhawb kev tawg ntawm sab nrauv phab ntsa putty. Nws haum rau substrate txav tsis cuam tshuam rau kev ncaj ncees ntawm txheej.
Cov cuab yeej no tseem ceeb heev rau cov ntawv thov sab nraud raug cuam tshuam rau ib puag ncig kev ntxhov siab.
3. Durability:
HPMC txhim kho lub zuag qhia tag nrho durability ntawm sab nrauv putty los ntawm kev txhim kho nws cov tsis kam mus puas, cuam tshuam thiab tshuaj lom neeg raug.
Cov yeeb yaj kiab tiv thaiv tsim los ntawm HPMC pab txuas ntxiv lub neej ntawm txheej thiab txo qhov kev xav tau ntawm kev saib xyuas tsis tu ncua.
Qhov zoo ntawm kev siv HPMC hauv phab ntsa putty:
1. ruaj khov zoo:
HPMC xyuas kom meej tias cov phab ntsa putty formulations zoo ib yam thiab ua tau raws li cov qauv kev ua tau zoo.
2. Txhim kho kev ua haujlwm:
Kev tswj hwm viscosity ntawm HPMC muab cov txheej txheem ua tau zoo dua, ua rau cov txheej txheem thov ua haujlwm tau zoo dua thiab siv tau zoo.
3. Txhim kho adhesion:
Cov khoom nplaum ntawm HPMC pab txhawb rau kev ua kom zoo, ua kom cov putty adheres zoo rau ntau yam substrates.
4. Versatility:
HPMC muaj ntau yam thiab tuaj yeem siv rau ntau hom kev tsim thiab tuaj yeem hloov kho kom tau raws li qhov project tshwj xeeb.
nyob rau hauv xaus:
Hydroxypropyl methylcellulose (HPMC) hmoov yog ib qho tseem ceeb muaj nyob rau hauv sab hauv thiab sab nrauv phab ntsa putty qauv. Nws cov khoom tshwj xeeb, suav nrog kev solubility, viscosity tswj thiab kev ua yeeb yaj kiab, ua rau nws zoo tagnrho rau kev txhim kho kev ua tau zoo thiab kav ntev ntawm phab ntsa txheej. Txawm hais tias siv sab hauv tsev lossis sab nraum zoov, phab ntsa putties muaj HPMC muab qhov zoo ib yam, txhim kho daim ntawv thov kev ua tau zoo thiab kev tiv thaiv ib puag ncig ntev. Raws li kev tsim kho kev lag luam txuas ntxiv mus, lub luag haujlwm ntawm HPMC hauv phab ntsa putty formulations tseem yog ib qho tseem ceeb kom ua tiav cov khoom zoo thiab ua haujlwm zoo.
Post lub sij hawm: Jan-25-2024