HPMC (Hydroxypropyl Methylcellulose) yog cov tshuaj muaj txiaj ntsig zoo uas feem ntau siv rau hauv cov ntaub ntawv tsim kho, tshwj xeeb tshaj yog nyob rau hauv kev siv qib kev tsim kho, uas nws ua haujlwm ntau lub luag haujlwm tseem ceeb. HPMC feem ntau yog siv rau hauv cov haujlwm tsim kho los txhim kho kev ua haujlwm ntawm cov ntaub ntawv tsim kho, txhim kho lawv cov khoom siv kho tshuab thiab tshuaj lom neeg, thiab yog li txhim kho qhov zoo thiab ua haujlwm ntawm kev tsim kho.
1. Lub cev thiab tshuaj lom neeg ntawm HPMC
HPMC yog cov dej-soluble nonionic cellulose ether nrog zoo thickening, zaj duab xis-forming, stabilizing thiab dej-retaining zog. Vim yog cov hydroxypropyl thiab methyl pawg nyob rau hauv nws cov qauv molecular, HPMC tuaj yeem yaj sai sai hauv cov kua dej thiab tsim cov kua nplaum colloidal. Cov tshuaj no muaj qhov zoo rheology thiab thickening peev xwm, yog li nws yog dav siv nyob rau hauv cov ntaub ntawv siv.
Hauv kev tsim kho, HPMC feem ntau ua haujlwm los ntawm cov khoom hauv qab no:
Thickening: HPMC tuaj yeem ua kom cov viscosity ntawm cov ntaub ntawv tsim kho, txhim kho kev ua haujlwm ntawm mortar lossis pob zeb, thiab tsis txhob stratification thiab nag lossis daus.
Kev tuav dej: Nws tuaj yeem txo cov evaporation ntawm cov dej, xyuas kom meej tias cov cement khaws cov dej txaus thaum lub sij hawm hardening txheej txheem, thiab pab txhim kho lub zog thiab toughness ntawm lub tsev cov ntaub ntawv.
Cov cuab yeej ua yeeb yaj kiab: HPMC tuaj yeem tsim cov yeeb yaj kiab zoo ib yam ntawm cov khoom siv, tiv thaiv cov khoom los ntawm kev cuam tshuam ntawm ib puag ncig sab nraud, thiab txuas ntxiv lub neej ntawm cov khoom siv.
Adhesion: HPMC txhim khu cov adhesion ntawm cov khoom thiab cov substrate, tshwj xeeb tshaj yog nyob rau hauv daim ntawv thov ntawm tiling, gypsum los yog lwm yam ntaub ntawv zoo nkauj.
2. Kev siv HPMC hauv cov khoom siv hauv tsev
HPMC tau siv dav hauv ntau yam khoom siv hauv tsev, suav nrog cov khoom siv cement, cov ntaub ntawv gypsum thiab cov nplaum hauv tsev. Cov hauv qab no yog lub luag haujlwm ntawm HPMC hauv ntau yam khoom siv hauv tsev loj:
2.1 Cement mortar
Cement mortar yog dav siv hauv phab ntsa masonry, pem teb paving, thiab lub tsev sab nrauv phab ntsa rwb thaiv tsev. Hauv cov ntawv thov no, HPMC ua lub luag haujlwm tseem ceeb. Nws tuaj yeem txhim kho kev tsim kho kev ua tau zoo ntawm cov cement mortar, ua rau kom muaj peev xwm ua haujlwm thiab tiv thaiv sagging ntawm mortar. Nyob rau tib lub sijhawm, cov khoom tuav dej ntawm HPMC tuaj yeem txo cov dej hauv cov mortar, xyuas kom meej tias cov cement yog hydrated, thiab txhim khu lub zog thiab durability ntawm mortar.
Txhim kho kev ua haujlwm ntawm mortar: Los ntawm kev ntxiv HPMC, lub mortar tuaj yeem tuav lub sijhawm ua haujlwm ntev dua, txo cov teeb meem ntawm kev tawg thiab shrinkage thaum tsim kho.
Txhim kho kev tiv thaiv sagging: Hauv kev tsim kho ntsug, xws li plastering lossis tiling, HPMC tuaj yeem tiv thaiv cov mortar los ntawm zawv zawg ntawm phab ntsa thiab txhim kho kev tsim kho kom zoo.
Txhim kho kev sib raug zoo: HPMC ua kom lub zog sib txuas ntawm cov mortar thiab substrate, kom ntseeg tau qhov ruaj khov thiab ua haujlwm ntev ntawm kev tsim kho.
2.2 Cov khoom siv gypsum
Gypsum-raws li cov ntaub ntawv feem ntau yog siv rau sab hauv phab ntsa plastering, qab nthab thiab muab faib phab ntsa. Lub luag haujlwm tseem ceeb ntawm HPMC hauv gypsum-based cov ntaub ntawv yog los txhim kho nws cov dej tuav, txhim khu fluidity thiab operability. Thaum lub sij hawm hardening txheej txheem ntawm gypsum, HPMC tuaj yeem ua kom cov dej tsis sib xws thiab tiv thaiv kev tawg thiab txo lub zog los ntawm kev poob dej ntau dhau.
Txuas lub sijhawm teem sijhawm: Los ntawm kev kho qhov chaw nrawm ntawm gypsum, HPMC tuaj yeem muab sijhawm rau cov neeg ua haujlwm tsim kho kom zoo thiab ua tiav.
Ua kom lub smoothness ntawm kev tsim kho: HPMC txhim kho qhov fluidity ntawm gypsum, ua kom kev tsim kho smoother, txo cov khoom pov tseg thiab kev tsim kho.
Txhim kho qhov smoothness: Qhov saum npoo ntawm cov ntaub ntawv gypsum siv HPMC yog smoother thiab smoother, uas tuaj yeem txhim kho cov nyhuv zoo nkauj ntawm phab ntsa.
2.3 Lub Tsev Adhesive
Lub tsev adhesives ua lub luag haujlwm tseem ceeb hauv pobzeb pasting, rwb thaiv tsev cov ntaub ntawv sib txuas thiab lwm yam khoom siv zoo nkauj. Qhov sib ntxiv ntawm HPMC tuaj yeem txhim kho kev sib raug zoo, qhib lub sijhawm thiab kev tsim kho ntawm cov nplaum. Tshwj xeeb tshaj yog nyob rau hauv kev tsim kho ntawm phab ntsa thiab pem teb vuas, lub peev xwm los tiv thaiv plam ntawm HPMC xyuas kom meej tias cov vuas yuav tsis txav mus tom qab pasting, yog li ua kom ntseeg tau qhov tseeb ntawm kev tsim kho.
Txhim kho kev sib raug zoo: HPMC txhim kho cov adhesion ntawm cov nplaum rau cov vuas thiab substrates, ua kom cov khoom ruaj khov.
Lub sijhawm qhib qhib: Cov dej tuav dej ntawm HPMC txuas ntxiv lub sijhawm qhib ntawm cov nplaum, muab cov neeg ua haujlwm tsim kho sijhawm ntxiv los kho thiab txhim kho kev tsim kho.
Anti-slip: Tshwj xeeb tshaj yog nyob rau hauv pasting ntawm cov vuas loj, HPMC tuaj yeem tiv thaiv cov vuas los ntawm zawv zawg thaum pasting thiab xyuas kom meej kev tsim kho.
3. Lwm yam kev siv ntawm HPMC hauv kev tsim kho
Ntxiv nrog rau cov ntawv sau npe saum toj no, HPMC tseem ua lub luag haujlwm tseem ceeb hauv ntau lwm cov ntaub ntawv hauv tsev, xws li cov ntaub ntawv hauv pem teb tus kheej, lub tsev sealants thiab sab nrauv phab ntsa. Hauv cov ntawv thov no, lub luag haujlwm tseem ceeb ntawm HPMC suav nrog:
Self-leveling pem teb: Nyob rau hauv tus kheej-leveling cov ntaub ntawv hauv pem teb, HPMC txhim kho cov fluidity thiab uniformity ntawm cov khoom, kom ntseeg tau lub flatness ntawm pem teb nto.
Lub tsev sealants: HPMC txhim kho kev ua haujlwm ntawm lub sealant, ua kom nws cov khoom sib xws hauv cov pob qij txha thiab tawg, thiab txhim kho nws cov khoom tiv thaiv kev laus.
Sab nrauv phab ntsa coatings: Nyob rau sab nrauv phab ntsa coatings, HPMC ua kom muaj kev tiv thaiv ib puag ncig thiab zoo adhesion ntawm txheej los ntawm kev txhim kho rheology thiab dej tuav ntawm txheej.
Lub luag haujlwm ntawm HPMC hauv kev tsim kho cov haujlwm yog ntau yam. Los ntawm kev txhim kho kev ua haujlwm ntawm cov khoom siv hauv tsev, txhim kho kev tsim kho kom zoo, txhim kho qhov zoo thiab ua haujlwm ntev ntawm cov khoom tiav, HPMC plays lub luag haujlwm tseem ceeb. Txawm hais tias nyob rau hauv cov cement mortar, gypsum-raws li cov ntaub ntawv, los yog lub tsev adhesives, HPMC tau txhim kho kev tsim kho kev ua tau zoo thiab qhov kawg ntawm lub tsev cov ntaub ntawv los ntawm nws cov thickening zoo heev, dej tuav, film-forming thiab adhesion zog. Raws li kev tsim kho kev lag luam txuas ntxiv nce nws cov kev xav tau rau kev tsim kho kom zoo thiab ua haujlwm tau zoo, daim ntawv thov thiab qhov tseem ceeb ntawm HPMC yuav loj hlob ntxiv, muab kev txhawb zog rau kev ua tiav ntawm kev tsim kho.
Post lub sij hawm: Sep-13-2024