HPMC (HydroxyPropyyl methylcellulose) yog ib hom dej-soluble polymer tshuaj ntxiv, uas yog siv dav hauv kev tsim kho kev tsim kho, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv xws li kev siv pob zeb ua kom zoo thiab plaster. Vim nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, HPMC ua si lub luag haujlwm tseem ceeb hauv kev txhim kho cov ntaub ntawv hauv tsev.
1. Daim ntawv thov ntawm HPMC hauv kev qia dub qib qhob
Kev ua tus kheej-tswj hwm yog ib hom qhob ua ke uas tuaj yeem ntws thiab theem siab, feem ntau yog siv rau kev kho hauv av thiab kho haujlwm. Piv nrog tsoos ua vaj tse, tus kheej-level qhob muaj qis viscosity thiab zoo fluidity, yog li nws tuaj yeem sau tau yooj yim hauv av tsis xwm yeem thaum kev tsim kho. Txawm li cas los xij, cemen thiab tsis tuaj yeem muab cov khoom siv ib txwm muaj thiab ua haujlwm tau zoo, yog li kev sib ntxiv ntawm HPMC tshwj xeeb yog ib qho tseem ceeb.
Kev txhim kho Fluidity: HPMC muaj cov kev tswj hwm zoo ntawm kev ua kom zoo. Nws tuaj yeem tsim cov ntaub ntawv ruaj khov hauv cov khoom siv cov paj tsib, kom cov pob zeb ua kom muaj dej ntxiv tom qab ntxiv dej txaus siab vim dej ntau dhau. HPMC tuaj yeem txhim kho cov xim zoo nkauj thiab nthuav dav ntawm tus kheej theem pob zeb ua los ntawm kev sib cuam tshuam rau cov dej thiab ua tiav qhov zoo tshaj plaws ntawm tus kheej cov nyhuv tus kheej.
Txhim kho cov dej cia: Kev tswj hwm tus kheej yuav tsum tau ua kom cov dej kom tsim nyog los tiv thaiv cov kab nrib pleb ntawm kev ua dej evaporation thaum kev tsim kho. HPMC tuaj yeem txhim kho cov dej khaws cia ntawm cov pob zeb ua, txo tus nqi kev tsim kho, txuas ntxiv lub sijhawm tsim kho, thiab paub meej tias qhov zoo ntawm kev ntsuas tus kheej.
Txhim kho cov kab nrib pleb network tsis haum rau cov pob zeb ua kom yooj yim, thiab txuas ntxiv cov kev pabcuam lub neej ntawm kev siv nyiaj ua ke.
Txhim kho cov nplaum: hauv cov txheej txheem kev tsim kho ntawm tus kheej-leveling qhob, cov nplaum ntawm cov pob zeb ua thiab lub hauv paus yog qhov ntsuas tseem ceeb. HPMC tuaj yeem txhim kho cov nplaum ntawm kev coj tus kheej thiab cov hauv av, kom muaj kev ruaj ntseg ntawm cov khoom siv, thiab zam qhov tshwm sim ntawm tev thiab kev tu.
2. Daim ntawv thov ntawm HPMC hauv Plaster Plaster yog ib lub tsev ua los ntawm Maas, uas yog siv dav rau phab ntsa saum npoo av thiab tiv thaiv. HPMC, raws li cov khoom siv hloov kho, tuaj yeem txhim kho kev ua tau zoo ntawm plaster. Nws lub luag haujlwm yog feem ntau xav txog hauv cov hauv qab no:
Txhim kho cov kev ua haujlwm plaster yuav tsum muaj qee lub sijhawm thiab tsim nyog fluidity, tshwj xeeb yog siv rau cov neeg loj-thaj chaw, ua haujlwm tshwj xeeb yog qhov tseem ceeb. HPMC tuaj yeem txhim kho kom haum rau lub fluidity thiab cov kev ua haujlwm ntawm plaster, ua rau nws muaj kev sib dhos ntau dua thaum cov ntawv thov, txo cov adchesion thiab kev teeb meem.
Kev Txhim Kho Cov Dej Tuav Ruaj Ntseg thiab Kev Txuas Khoom Siv tau tuaj yeem qhib lub sijhawm: plaster yog nquag mus rau thaj chaw tawg lossis tsis sib luag vim muaj dej evaporation sai sai. Qhov kev sib txuas ntawm HPMC tuaj yeem txhim kho nws cov dej khaws cia, yog li ncua nws lub sijhawm kho, kom paub zoo dua thaum daim ntawv thov, thiab zam kev tawg thiab ua haujlwm.
Txhim kho kev sib koom ua lub zog: Hauv kev tsim kho plaster, yog qhov tseem ceeb rau cov nplaum thiab ruaj khov ntawm txheej. HPMC muaj peev xwm nce ntxiv rau txoj kev sib raug zoo ntawm plaster, kom ntseeg tau tias cov plaster, thiab tiv thaiv kom txhob tawg lossis tawg vim tias kub hloov.
Txhim kho kev tawm tsam: plaster tuaj yeem cuam tshuam los ntawm ib puag ncig cov av noo, kub thiab lwm yam thaum lub sijhawm ua kom tawv nqaij tawv, ua rau muaj cov kab nrib pleb. HPMC tuaj yeem ua tiav cov kab nrib pleb tshwm sim los ntawm shrinkage thiab ntsuas qhov kev pabcuam kub hnyiab, thiab txuas ntxiv kev pabcuam lub neej ntawm phab ntsa los ntawm kev txhim kho elasticity ntawm cov khoom.
Txhim kho cov dej tsis kam thiab durability: HPMC tsis tsuas yog txhim kho cov dej khaws cia ntawm plaster, tab sis kuj pab tau nws cov dej tsis kam thiab kav ntev. Tshwj xeeb tshaj yog nyob rau hauv qee qhov chaw noo noo, hpmc tuaj yeem tiv thaiv kev ua kom muaj cov nyhuv dej, thiab tsis txhob ua kom me me lossis tsis zoo ntawm phab ntsa tom qab noo noo.
3. Kev ua tau zoo thiab cov nyom ntawm HPMC
Daim ntawv thov ntawmHPMC Nyob rau hauv tus kheej-levelation qhob thiab plaster muaj ntau yam zoo, feem ntau nyob rau hauv cov kev cai ntawm nws cov kev cai zoo, thiab txhim kho tawg. Txawm li cas los xij, thaum siv HPMC, nws tseem tsim nyog yuav tau them sai sai rau nws qhov kev siv tau zoo thiab sib xyaw nrog lwm cov kev sib ntxiv. HPMC ntau dhau tuaj yeem ua rau lub fluidity ntawm cov pob zeb lossis plaster kom muaj zog dhau, uas yuav cuam tshuam nws lub zog kawg thiab cov qauv kev ruaj khov. Yog li ntawd, hauv cov ntawv thov siv, nws yog qhov tseem ceeb heev rau kev tsim nyog tswj hwm tus nqi HPMC siv kom ntseeg tau tias kev ua haujlwm ntawm lub tsev.
Raws li cov dej tseem ceeb-soluble cov khoom siv, HPMC tau dav siv nyob rau hauv tus kheej-qib qhob thiab plaster. Nws tuaj yeem txhim kho kom muaj kua dej, ua kom tsis taus dej, tawg tsis taus thiab cov nplaum ntawm cov ntaub ntawv hauv tsev, thiab txhim kho lawv cov kev tsim kho thiab ua tau zoo. Txawm li cas los xij, thaum siv HPMC, nws hom thiab ntau yam thiab siv tau xaiv raws li cov kev xav tau sib txawv thiab cov kev tsim qauv kom ua tau zoo tshaj plaws ntawm cov khoom siv. Nrog rau qhov kev xav tau loj hlob rau cov ntaub ntawv tshiab hauv kev tsim kho cov ntaub ntawv, HPMC yuav txuas ntxiv mus ua lub luag haujlwm tseem ceeb hauv kev tsim kho cov khoom lag luam thiab plaster rau yav tom ntej.
Sijhawm Sijhawm: NOV-20-2024