HydroxyPropyyl methylulose (HPMC) yog cov khoom siv dej-solub Nyob rau hauv xyoo tsis ntev los no, daim ntawv thov ntawm HPMC nyob rau hauv tsev cug tau ua kev tsim qauv, thiab txhim kho cov kev ua haujlwm tshawb xyuas, ua kom cov dej tawm hws thiab ua kom zoo nkauj ntawm cug.
1. Cov khoom yooj yim ntawm HPMC
HPMC yog cov tsis-ionic polymer compeded los ntawm kev hloov tshuaj lom neeg ntawm ntuj cog cellulose. Nws cov yam ntxwv tseem ceeb yog cov dej ua kom zoo, ua yeeb yaj kiab zoo heev, ua yeeb yaj kiab ua yeeb yaj kiab, dej ua kom huv, ua kom tuab thiab ruaj khov. Los ntawm kev tswj cov qib ntawm kev hloov chaw ntawm hydroxypropyl thiab cov tshuaj methyls thiab tshuaj lom neeg tuaj yeem hloov kho, uas tso cai rau HPMC ua lub luag haujlwm hauv cov ntawv thov sib txawv.
2. Lub luag haujlwm ntawm HPMC nyob rau hauv plaster cug
2.1 Txhim Txhim Kho Cov Dej Ua Haujlwm
Thaum lub sijhawm tsim qauv ntawm cov tshuaj khib, tshwj xeeb tshaj yog nyob rau hauv cov dej ntshiab, yog li cuam tshuam txog kev cug lub zog thiab tawg ntawm cov tshuaj khib. HPMC, raws li cov dej-soluble polymer, tuaj yeem txhim kho cov dej tuav ntawm lub tshuaj khib thiab ncua ntawm cov dej evaporation. Cov pab pawg hydroxyl thiab methyl hauv nws cov lwg tuaj yeem tsim cov hlua khau thiab cov dej lwg me me, yog li txo dej poob. Cov nyhuv no tsis tsuas pab txhawm rau txhim kho kev tsim kho ntawm lub tshuaj khib, tab sis kuj tseem zoo zam kom tsis txhob tawg los ntawm dej evaporation sai.
2.2 Txhim Kho Kev Tsim Kho Kev Siv
Kev tsim kho ntawm cov tshuaj khib, tshwj xeeb tshaj yog cov kev tsim kho ntawm kev tsim kho, yog qhov tseem ceeb cuam tshuam rau cov khoom siv ua tau zoo. HPMC tuaj yeem txhim kho fluidity thiab cov yees duab ntawm cov tshuaj khib, ua kom yooj yim rau cov neeg ua haujlwm kom muaj kuab tshuaj kom tsis txhob ua haujlwm tsis muaj zog lossis stratification. Ib qho ntxiv, HPMC kuj tseem tuaj yeem txo cov nplaum thiab ua kom tiav tias lub tshuaj khib tsis yooj yim ntws los yog swb rau cov txheej txheem kev tsim kho, tshwj xeeb tshaj yog nyob rau ntawm cov txheej txheem ntsug.
2.3 Txhim kho kev tawg
Thaum lub sij hawm cov txheej txheem tawv tawv, tshuaj khib feem ntau muaj feem ntau mus tawg vim tias txoj kev hloov ua kom muaj cua sov, cov dej nqus ntawm lub substrate thiab hloov pauv hauv ib puag ncig sab nraud. Cov lus qhia ntawm HPMC tuaj yeem txo cov kev tshwm sim ntawm qhov teeb meem no. Nws tuaj yeem txhim kho txoj hlua khi ntawm lub tshuaj khib, ua rau nws tsis tshua tawg ua rau cov txheej txheem kom qhuav. Tsis tas li ntawd, HPMC kuj muaj qee yam kev txhim kho ntawm microstructure ntawm cov cugas-cov ntaub ntawv, uas tuaj yeem txo cov txheej txheem kom huv si, thiab ntxiv txhim kho qhov tawg tsis kam.
2.4 Txhim Kho Adhesion
Raws li surfactant, HPMC tuaj yeem txhim kho cov nplaum ntawm lub tshuaj khib thiab txheej. Txawm hais tias nws yog sib chwv nrog cov sib txawv, pob zeb av lossis gypsum phab ntsa, HPMC tuaj yeem txhim kho lub cug ntawm ntog lossis tawg. Ntawm kev tiv tauj saum npoo ntawm ntau yam substrates, HPMC tuaj yeem tsim cov yeeb yaj kiab tiv thaiv los txhim kho lub zog uas muaj zog, yog li txhim kho lub durability ntawm lub cug.
2.5 txhim kho impermability
Nyob rau hauv ib puag ncig huab cua, lub impermabeability ntawm lub roj cug yog qhov tshwj xeeb tshaj yog. HPMC tuaj yeem txhim kho nws qhov tsis muaj tseeb los ntawm kev txhim kho cov kev sib xyaw ntawm lub tshuaj khib. Cov pab pawg hydroxyl thiab methyl hauv HPMC molecule tuaj yeem tsim cov qauv denseed hauv lub tshuaj khib, tab sis kuj tseem ua rau lub neej ntawm lub tshuaj khib nyiab hauv ib puag ncig.
3.. Cov ntawv thov tshwj xeeb ntawm HPMC nyob rau hauv plug cort
3.1 Ntsa Sab Nraud Thiab Sab Nraud Ntsa Cuav
Sab hauv thiab sab nraud phab ntsa plaster cug yog ib qho ntawm feem ntau dav siv thaj chaw rau HPMC. Txij li thaum sab nrauv phab ntsa uas yuav tsum tau ntsib huab cua muaj zog hloov thiab qhov sib txawv ntawm phab ntsa phab ntsa sib txawv tshwj xeeb thiab cov dej tsis kam tiv taus. Cov dej khaws cia thiab tawg tsis kam ntawm HPMC ua nws tseem ceeb heev hauv kev tshuaj khib sab nrauv. Lub sab hauv phab ntsa collhaum tsuas yog txhim kho kev tsim kho zoo thiab ua tau zoo los ntawm kev txhim kho kev ua haujlwm, lub hauv paus thiab cov nplaum.
3.2 zoo nkauj cug
Nrog rau diversification ntawm architectural kev kho kom zoo nkauj yeej, qhov kev thov kom zoo nkauj cort yog nce. Nyob rau hauv hom cug no, HPMC tuaj yeem txhim kho cov volp cap, tso cai rau cov neeg ua haujlwm tsim kho kom ua ntau yam kev kho kom zoo nkauj ntawm thaj chaw loj ntawm cov phab ntsa loj. Lub zoo fluentity thiab dej tuav tseg ntawm HPMC pab lub cug kom tswj tau zoo thaum lub sijhawm ua kom qhuav lossis kev poob qis.
3.3 CUG CUG
Hauv kev kho kho lub tsev, cov nplaum thiab impermetility ntawm cug yog qhov tseem ceeb heev. HPMC tuaj yeem txhim kho cov nplaum ntawm cug, yog li cov tshuaj khib nyiab zoo tuaj yeem ua tau zoo sib txuas nrog thawj lub phab ntsa saum npoo av, zam kev poob ntawm cov txheej txheem kho lossis cov tsos ntawm hollowing. Tsis tas li ntawd, HPMC tuaj yeem txuas qhov kev pabcuam lub neej ntawm cov tshuaj khib thiab txo cov kev tawg ntawm cov txheej kho.
Daim ntawv thov ntawm hydroxypropylencellulose (HPMC) nyob rau hauv cov dej tshuaj rov qab, tab sis kuj tseem ua haujlwm ntawm lub tshuaj khib nyiab kom tau raws li cov kev xav tau ntawm cov chaw sib txawv. Nrog kev nce qib nruam ntawm HPMC thev naus laus zis thiab kev nthuav dav ntawm nws daim ntawv thov kev tsim khoom hauv kev tsim kho yog qhov chaw tsim khoom zoo thiab ua tiav cov dej num ua haujlwm.
Lub Sijhawm Post: Feb-19-2025