HPMC (HydroxyPropyyl methylulose) yog qhov tseem ceeb txuas ntxiv siv hauv cov khoom lag luam hauv tsev, tshwj xeeb tshaj yog cov khoom lag luam xws li putty hmoov, cov nplaum thiab txheej. Nws yog dej-soluble polymer compound uas feem ntau cuam tshuam rau kev ua tau zoo ntawm cov ntaub ntawv tsim tau los ntawm kev kho nws cov viscosity. Hauv cov hmoov putty, cov chaw sib txawv ntawm HPMC muaj kev cuam tshuam tseem ceeb ntawm kev ua haujlwm ntawm cov khoom lag luam, xws li kev ua haujlwm, kev tuav dej, theem thiab qhuav sijhawm.
1. Lub luag haujlwm ntawm HPMC
Hauv cov hmoov putty, lub ntsiab num ntawm HPMC suav nrog:
Txhim kho cov dej rov qab: HPMC tuaj yeem tswj cov dej volatilization nyob rau hauv putty hmoov thaum lub sij hawm tsim nyog ntawm kev tsim tawm ntawm putty, ua rau muaj kev sib tsoo lossis tsis sib haum.
Txhim kho cov haujlwm ua haujlwm: los ntawm kev kho cov visccity ntawm HPMC, cov kev ua haujlwm ntawm cov hmoov putty tuaj yeem txhim kho, ua rau nws yooj yim rau kev thov thiab txhuam.
Ntxiv Bonding zog: HPMC tuaj yeem txhim kho cov hmoov butty thiab substrate, txhim kho cov nplaum ntawm putty, thiab txo qis.
Kho cov flucity: lub viscosity hloov HPMC kuj tseem tuaj yeem hloov kho kom zoo ntawm cov hmoov uas muaj zaub ua kom ntseeg tau.
2. Tus cawv ntawm txawv viscosity HPMC ntawm cov hmoov putty
(1) Tus cawv ntawm cov viscosity nyob qis HPMC ntawm hmoov putty
Tsis muaj viscosity HPMC feem ntau yog siv rau hauv cov hmoov nplaum uas muaj hmoov uas yuav tsum muaj kev kub siab dua. Nws cov cawv yog qhov tseem ceeb ntawm cov hauv qab no:
Kev ua haujlwm: Qis viscosity HPMC yuav ua rau cov hmoov puty muaj cov hmoov zoo dua thiab muab txhuam kom yooj yim thiab siv tusyees siv tau. Qhov no haum rau cov chaw tsim khoom uas yuav tsum tau ua haujlwm ntau dua, tshwj xeeb tshaj yog thaum ua ntawv thov ntawm cov chaw loj.
Dej khaws cia: txij li cov molecular chart ntawm cov viscosity qis HPMules yog tsis muaj zog thiab cov dej khaws cia ntawm putty hmoov yog tus tsis zoo. Qhov no yuav ua rau lub putty kom tawg yooj yim lossis poob adhesion tom qab kev tsim kho.
Adhesion: cov nplaum ntawm cov viscosity qis HPMC yog tsis muaj zog, yog li nws cov nplaum rau qee qhov tshwj xeeb substrates yuav tsis muaj zog raws li cov viscosity hostcosity hostcc. Nws yuav tsum tau siv ua ke nrog lwm cov ntaub ntawv uas txhim kho adhesion.
(2) Cov nyhuv ntawm nruab nrab viscosity HPMC ntawm hmoov putty
Nruab nrab viscosity HPMC feem ntau siv nyob rau hauv feem ntau cov qauv putty hmoov qauv thiab muaj kev ua tau zoo:
Kev ua haujlwm: Nruab nrab viscosity HPMC tuaj yeem muab cov hmoov av loj thiab ua rau cov hmoov tsis yooj yim tsis yooj yim thaum lub sijhawm tsim kho, thiab muaj kev ua haujlwm zoo.
Dej khaws cia: Nruab nrab visccosity HPMC ua tau zoo hauv kev ua haujlwm ntawm cov dej, kom ua tau zoo rau cov kev ua haujlwm ntawm kev tsim kho thiab kev sib tw ntawm cov txheej txheem kom qhuav.
Cov nplaum: HPMC ntawm qib viscosity no muab cov nplaum sib cais, uas tuaj yeem ua kom cov khoom nplaum zoo ntawm cov txheej putty thiab lub substrate thiab tiv thaiv cov txheej los ntawm kev poob.
(3) Cov nyhuv ntawm cov viscosity siab HPMC ntawm cov hmoov putty
Siab viscosity HPMC yog tsim nyog rau putty hmoov cov qauv uas yuav tsum tau ua haujlwm siab dua, tshwj xeeb rau cov ntawv thov kom muaj zog khaws cia thiab muaj zog adhesion. Nws cov kev cuam tshuam suav nrog:
Kev Siv Kev Siv Ua Haujlwm: Lub siab viscosity HPMC ua rau muaj cov khoom siv uas muaj zog los tiv thaiv kom muaj zog lossis ua kom haum rau kev tsim kho ntawm phab ntsa ntsug lossis cov chaw nyob hauv.
Dej khaws cia: Cov viscosity host
Adhesion: siab viscosity HPMC muab cov khoom nplaum muaj zog, xws li cov khoom lag luam hlau lossis cov khoom lag luam du ua kom ruaj khov ntawm cov txheej putty.
3. Kev ua kom zoo ntawm Putty hmoov ua hauj lwm los ntawm viscosity
Txhawm rau kom ua tiav qhov zoo tshaj plaws Putty cov hmoov ua tau zoo, feem ntau nws yog qhov tsim nyog los xaiv HPMC viscosity tsim nyog raws li thaj chaw kev tsim kho thiab siv cov cai. Feem ntau hais lus, qis viscosity HPMC yog tsim nyog rau kev thov loj-thaj chaw thiab tsim kho ceev; Nruab Nrab Viscosity HPMC yog tsim nyog rau kev kho dav dav thiab txheej kev tsim kho, ntsuas kev tsim kho, dej khaws cia thiab cov nplaum; Siab visccosity HPMC yog siv hauv cov chaw ua haujlwm tshwj xeeb uas yuav tsum qhib lub sijhawm ntev dua thiab muaj zog nplaum.
HPMC nrog cov viscosities sib txawv muaj qhov cuam tshuam tseem ceeb ntawm kev ua yeeb yam ntawm hmoov putty. Tsis muaj viscosity yog qhov tsim nyog rau cov ntawv thov muaj cov kev xav tau siab, nruab nrab ntawm cov khoom siv ntau yam, thiab cov viscosity siab tuaj yeem muab cov dej muaj zog khaws cia thiab cov nplaum. Raws li kev siv kev siv tshwj xeeb, cov xaiv kev xaiv HPMC tsim nyog tuaj yeem kho cov hmoov tsim kho thiab ua tau zoo ntawm cov hmoov sib txawv thiab ua tau raws li cov kev xav tau ntawm cov xwm txheej sib txawv. Yog li ntawd, nyob rau hauv kev tsim thiab siv cov hmoov putty, nws yog ib qho tseem ceeb uas yuav tsum xaiv HPMC nrog viscosity uas tsim nyog.
Lub Sijhawm Post: Feb-19-2025