HPMC (Hydroxypropyl Methylcellulose) yog ib qho tshuaj polymer uas yaj tau hauv dej, uas siv dav hauv kev lag luam kev tsim kho, tshwj xeeb tshaj yog hauv cov ntaub ntawv xws li cov pob zeb ua vaj tse thiab plaster. Vim nws cov khoom siv lub cev thiab tshuaj lom neeg tshwj xeeb, HPMC ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo ntawm cov ntaub ntawv tsim kho no.
1. Daim ntawv thov ntawm HPMC hauv kev sib xyaw ua ke tus kheej
Cov pob zeb ua vaj tse uas nws tus kheej leveling yog ib hom pob zeb uas tuaj yeem ntws thiab leveled nws tus kheej, feem ntau yog siv rau kev kho av thiab kho. Piv nrog cov pob zeb ib txwm muaj, cov pob zeb uas nws tus kheej leveling muaj viscosity qis dua thiab fluidity zoo, yog li nws tuaj yeem yooj yim sau cov av tsis sib xws thaum lub sijhawm tsim kho. Txawm li cas los xij, cov cement ntshiab thiab lwm yam khoom siv ib txwm muaj feem ntau tsis tuaj yeem muab fluidity thiab operability txaus, yog li ntxiv HPMC yog qhov tseem ceeb heev.
Txhim kho qhov fluidity: HPMC muaj cov nyhuv zoo rau kev tswj cov fluidity. Nws tuaj yeem tsim ib lub kaw lus colloidal ruaj khov hauv cov ntaub ntawv cement, yog li ntawd cov pob zeb ua kom muaj kua ntau dua tom qab ntxiv dej, thiab yuav tsis ua rau dej ntws vim muaj dej ntau dhau. HPMC tuaj yeem txhim kho qhov fluidity thiab kev nthuav dav ntawm cov pob zeb ua kom nws tus kheej los ntawm kev sib cuam tshuam nrog dej, kom ntseeg tau tias nws tuaj yeem npog tag nrho hauv av thaum lub sijhawm tsim kho thiab ua tiav qhov zoo tagnrho rau nws tus kheej.
Txhim kho kev khaws dej: Cov pob zeb ua vaj tse uas nws tus kheej yuav tsum tau khaws dej kom zoo kom tiv thaiv cov kab nrib pleb uas tshwm sim los ntawm kev ua dej ntau dhau thaum lub sijhawm tsim kho. HPMC tuaj yeem txhim kho kev khaws dej ntawm cov pob zeb ua vaj tse, txo qhov nrawm ntawm kev ua dej, ncua lub sijhawm tsim kho, thiab xyuas kom meej qhov zoo ntawm cov pob zeb ua vaj tse uas nws tus kheej.
Txhim kho kev tiv thaiv kab nrib pleb: HPMC tuaj yeem tsim cov qauv sib txuas lus yooj ywm hauv cov pob zeb ua vaj tse, uas tuaj yeem ua rau muaj kev ntxhov siab zoo, txo cov kab nrib pleb los ntawm kev ntsws, txhim kho kev tiv thaiv kab nrib pleb ntawm cov pob zeb ua vaj tse, thiab txuas lub neej ua haujlwm ntawm cov pob zeb ua vaj tse tus kheej.
Txhim kho kev nplaum: Hauv cov txheej txheem tsim kho ntawm cov pob zeb ua vaj tse tus kheej, qhov nplaum ntawm cov pob zeb ua vaj tse thiab lub hauv paus yog qhov qhia txog kev ua tau zoo tseem ceeb. HPMC tuaj yeem txhim kho qhov nplaum ntawm cov pob zeb ua vaj tse tus kheej thiab hauv av, xyuas kom meej tias cov khoom siv ruaj khov thaum lub sijhawm tsim kho, thiab tiv thaiv kom tsis txhob muaj tev tawm thiab poob.
2. Kev siv HPMC hauv plaster Plaster yog cov khoom siv hauv tsev ua los ntawm cement, gypsum, xuab zeb thiab lwm yam khoom ntxiv, uas yog siv dav rau kev kho kom zoo nkauj thiab tiv thaiv phab ntsa. HPMC, ua cov khoom hloov kho, tuaj yeem txhim kho kev ua tau zoo ntawm plaster. Nws lub luag haujlwm feem ntau yog pom tseeb hauv cov hauv qab no:
Txhim kho kev ua haujlwm: Kev tsim cov plaster xav tau qee lub sijhawm thiab kev ua haujlwm kom zoo, tshwj xeeb tshaj yog thaum siv rau ntawm phab ntsa loj, kev ua haujlwm yog qhov tseem ceeb heev. HPMC tuaj yeem txhim kho kev ua haujlwm thiab kev ua haujlwm ntawm plaster, ua rau nws sib xws dua thaum thov, txo qhov nyuaj ntawm kev nplaum thiab kev tsim kho.
Txhim kho kev khaws dej thiab ntev lub sijhawm qhib lub kaus poom: Cov plaster feem ntau yuav tawg ntawm qhov chaw lossis tsis sib xws vim yog dej ua pa sai sai thaum lub sijhawm thov. Kev ntxiv HPMC tuaj yeem txhim kho nws cov dej khaws cia, yog li ncua nws lub sijhawm kho, xyuas kom meej tias cov plaster zoo ib yam thaum lub sijhawm thov, thiab zam kev tawg thiab poob.
Txhim kho lub zog sib txuas: Hauv kev tsim cov plaster, lub zog sib txuas yog ib qho tseem ceeb uas cuam tshuam rau qhov kev sib txuas thiab kev ruaj khov ntawm cov txheej. HPMC tuaj yeem ua rau lub zog sib txuas ntawm plaster zoo dua, xyuas kom meej tias cov plaster tuaj yeem txuas ruaj khov rau ntawm qhov chaw substrate, thiab tiv thaiv kev poob lossis tawg vim muaj zog sab nraud lossis kev hloov pauv kub.
Txhim kho kev tiv thaiv kab nrib pleb: Cov plaster yuav raug cuam tshuam los ntawm cov av noo ib puag ncig, kub thiab lwm yam thaum lub sijhawm ua kom tawv, ua rau muaj kab nrib pleb ntawm qhov chaw. HPMC tuaj yeem txo qhov kab nrib pleb uas tshwm sim los ntawm kev hloov pauv ntawm qhov ntsws thiab kub, txhim kho qhov kev tiv thaiv kab nrib pleb ntawm cov plaster, thiab txuas ntxiv lub neej ua haujlwm ntawm phab ntsa los ntawm kev txhim kho qhov elasticity ntawm cov khoom.
Txhim kho kev tiv thaiv dej thiab kev ruaj khov: HPMC tsis yog tsuas yog txhim kho kev khaws dej ntawm plaster, tab sis kuj txhim kho nws cov dej tsis kam thiab kev ruaj khov. Tshwj xeeb tshaj yog nyob rau hauv qee qhov chaw noo noo, HPMC tuaj yeem tiv thaiv kev nkag mus rau hauv dej noo, txhim kho cov dej tsis kam ntawm plaster, thiab zam kev pwm lossis kev puas tsuaj ntawm phab ntsa tom qab noo noo.
3. Cov txiaj ntsig zoo thiab cov teeb meem ntawm HPMC
Daim ntawv thov ntawmHPMC Hauv kev ua cov pob zeb thiab plaster uas nws tus kheej leveling muaj ntau yam zoo, feem ntau yog hais txog nws txoj kev tswj hwm zoo fluidity, txhim kho adhesion, thiab txhim kho kev tiv thaiv kab nrib pleb. Txawm li cas los xij, thaum siv HPMC, nws tseem ceeb heev uas yuav tsum tau them sai sai rau nws cov koob tshuaj thiab kev sib raug zoo nrog lwm cov khoom ntxiv. HPMC ntau dhau yuav ua rau cov kua ntawm cov pob zeb lossis plaster muaj zog dhau, uas yuav cuam tshuam rau nws lub zog kawg thiab kev ruaj khov ntawm cov qauv. Yog li ntawd, hauv kev siv ua haujlwm, nws yog qhov tseem ceeb heev uas yuav tsum tswj hwm qhov ntau ntawm HPMC siv kom ntseeg tau tias cov khoom siv hauv tsev ua haujlwm tau zoo.
Ua ib yam khoom siv polymer uas yaj tau hauv dej tseem ceeb, HPMC siv dav hauv cov pob zeb ua vaj tse thiab plaster uas nws tus kheej leveling. Nws tuaj yeem txhim kho qhov fluidity, dej khaws cia, tawg tsis kam thiab lo rau cov khoom siv hauv tsev no, thiab txhim kho lawv cov kev ua tau zoo hauv kev tsim kho thiab qhov zoo kawg. Txawm li cas los xij, thaum siv HPMC, nws hom thiab koob tshuaj yuav tsum tau xaiv raws li qhov xav tau ntawm kev siv sib txawv thiab cov qauv tsim kom ntseeg tau tias cov khoom siv ua tau zoo tshaj plaws. Nrog rau qhov kev thov ntau ntxiv rau cov khoom siv tshiab hauv kev lag luam tsim kho, HPMC yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv cov khoom siv hauv tsev xws li cov pob zeb ua vaj tse thiab plaster uas nws tus kheej leveling yav tom ntej.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-20-2024