Thaum ua kom cov hmoov putty thiab chot ntub dej, xaiv cov yeeb yam ntawm hydroxypropylulose (HPMC) yog qhov tseem ceeb rau kev ua haujlwm ntawm cov khoom. Raws li ib qho tseem ceeb ntxiv ntxiv, HPMC muaj cov haujlwm ntawm thickening, dej tuav, thiab muaj kev ruaj khov.
1. Lub luag haujlwm ntawm HPMC nyob rau hauv putty hmoov thiab cug qhuav
Thickening: HPMC muaj peev xwm ua kom muaj txiaj ntsig zoo ua kom zoo sib xws ntawm cov hmoov putty thiab cug cug qhuav los ua kom tau kev ua haujlwm zoo thiab cov khoom nplaum thaum lub sijhawm kev tsim kho.
Dej khaws cia: HPMC muaj cov dej ua haujlwm zoo heev thiab tuaj yeem txo cov hmoov tsis muaj zog, yog li siv lub zog qhuav, cov khoom ntawm cov khoom kawg.
Stability: HPMC tuaj yeem tiv thaiv stratification thiab cais cov tshuaj khib thiab muab cov hmoov tso rau thaum cia thiab tswj kev sib xyaw.
Kev ua haujlwm: los ntawm kev txhim kho rheological cov khoom siv, HPMC tuaj yeem txhim kho kev ua haujlwm ntawm cov khoom lag luam, ua rau nws ua paug thiab txo cov shrinkage thiab tawg tom qab kev tsim kho.
2. Qhov xwm txheej cuam tshuam rau kev xaiv HPMC viscosity
Thaum xaiv cov visccity ntawm HPMC, cov ntsiab lus hauv qab no yuav tsum tau txiav txim siab:
Yam khoom thiab daim ntawv thov: ua kom muaj hmoov thiab xhuv qhuav tau sib txawv thiab yuav tsum muaj cov viscosities txawv. Piv txwv li, phab ntsa wilty hmoov yuav tsum muaj cov viscosity ntau dua rau kev ncua kev raug ncua zoo, thaum txoj kev tshuaj khib pem teb yuav xav tau qis viscosity rau kev ua kom zoo nkauj.
Kev Tsim Kho Txoj Kev Siv: Cov qauv kev siv sib txawv muaj cov sib txawv yuav tsum tau ua rau lub visccosity ntawm HPMC. Kev tuav cov ntawv thov feem ntau yuav tsum muaj viscosity, thaum cov neeg kho tshuab txau yuav tsum muaj cov viscosity hauv nruab nrab thiab qis viscosity los xyuas kom meej.
Ib puag ncig cov xwm txheej: Thaj kub ib puag ncig thiab cov av noo tuaj yeem cuam tshuam kev ua haujlwm ntawm HPMC. Nyob rau hauv cov kev mob siab, xaiv ntau dua viscosity HPMC tuaj yeem tswj cov dej poob zoo, thaum nyob hauv qhov chaw av noo
Cov Txheej Txheem Tsim Txheej Txheem: Lwm cov khoom xyaw nrog rau ntawm cov formula ntawm putty hmoov kuj tseem yuav cuam tshuam rau kev xaiv HPMC. Piv txwv li, muaj lwm yam thickeners, fillers lossis cov ntxiv yuav xav tau lub viscc tuaj yeem hloov kho kom ua tiav kom tau nyiaj tshuav.
3. Xaiv cov txheej txheem rau HPMC viscosity
Lub visccosity ntawm HPMC feem ntau yog qhia hauv Mpa · S (Millipasasas). Hauv qab no yog ib qho HPMC viscosity xaiv cov txheej txheem:
Putty hmoov:
Phab Ntsa Putty hmoov: HPMC nrog 150,000-200,000 mpaip thiab yog haum rau kev ua haujlwm thiab kev kawm tau zoo dua.
Teb Chaws Putty Hmoov: HPMC nrog 50,000-100,000 tus MPH S haum kom paub meej tias fellisticity thiab kev sib tw.
Cuag cug:
Masonry colle: HPMC nrog 30,000-60,000 mpa -60 tsim nyog rau kev txhim kho cov dej rov qab thiab kev tsim kho.
Plastering Cug: HPMC nrog 75,000-100,000 Mpa-· S yuav nce ntxiv thiab haum rau kev siv tes los ntawm kev tuav phau ntawv.
Pobzeb nplaum: HPMC nrog 100,000-150,000 MPAs tsim nyog rau cov khoom nplaum uas yuav tsum muaj zog dua.
Tshwj xeeb lub hom phiaj cug: Xws li kev sib xyaws tus kheej thiab kho cov tshuaj khib, qis viscosity hpmc (20,000-40,000 kev ua tau zoo ntawm kev ua tau zoo thiab ua tau zoo.
IV. Cov lus pom zoo rau HPMC viscosity xaiv
Hauv cov txheej txheem ntau lawm, cov lus pom zoo hauv qab no yuav tsum tau ua thaum xaiv HPMC viscosity:
Kev sim ua pov thawj: Ua ntej pawg kev sim, cov kev sim me me yog nqa tawm los xyuas cov nyhuv hpmc ntawm cov khoom lag luam. Nrog rau cov kev ua tau zoo xws li kev tsim kho, dej khaws cia, thiab tawv tawv.
Tus neeg xa khoom tau pom zoo: Tham txog kev txhawb nqa kev pab ntawm HPMC xa khoom kom cov ncauj lus kom ntxaws thiab cov lus pom zoo hais txog cov khoom. Lawv feem ntau muaj peev xwm muab cov qauv HPMC nrog cov viscosities txawv rau kev sim.
Haum thiab kev ua kom zoo: Raws li kev siv cov nyhuv siv tiag tiag, lub viscosity ntawm HPMC txuas ntxiv mus rau qhov ua tau zoo. Thaum lub sij hawm ua ntawv thov cov txheej txheem, kev xaiv HPMC raug hloov kho nyob rau lub sijhawm xav txog cov kev hloov pauv ntawm cov qauv thiab cov pej xeem hloov.
V. Kuaj thiab Tswjhwm HPMC viscosity
Tom qab xaiv HPMC nrog cov viscosity uas tsim nyog, kev tswj hwm zoo kuj tseem ceeb:
Viscosity Kev txiav txim siab: Kev daws teeb meem HPMC siv tau siv tus qauv Visciveter (xws li Brookfield visiCometer) kom ntseeg tau tias nws ua tau raws li cov kev cai tshwj xeeb.
Dej Tuav Tseg Kev Kawm: Kuaj cov dej khaws cia ntawm cov hmoov txhuas thiab cov tshuaj khov ua kom ntseeg tau tias cov dej ua kom muaj txiaj ntsig ntawm HPMC ua tau raws li cov txheej txheem xav tau.
Kev Ntsuam Xyuas Kev Siv Ua Haujlwm: Kuaj qhov ua haujlwm ntawm cov khoom lag luam hauv kev tsim kho kom ntseeg tau tias HPMC tsis cuam tshuam rau kev ua haujlwm.
Xaiv HPMC nrog txoj cai viscosity yog qhov tseem ceeb rau kev tsim cov kev ua tau zoo putty thiab cug muag. Nyob ntawm cov khoom siv, kev tsim qauv kev tsim kho, cov kev tsim kho ib puag ncig thiab kev tsim qauv, HPMC nrog cov kuab tshuaj sib txawv yuav tsum tau xaiv kom tau raws li cov kev xav tau tshwj xeeb. Los ntawm kev sim cov lus pov thawj, cov lus pom zoo, kho kom haum, nws tuaj yeem ntseeg tau tias cov khoom kawg tau ua haujlwm zoo, yog kev txhim kho kev ua lag luam kev sib tw ntawm cov khoom.
Lub Sijhawm Post: Feb-17-2025