qhia
Additives tau dhau los ua ib feem ntawm cov nplais nplaum thiab ua lub luag haujlwm tseem ceeb hauv lawv cov kev ua tau zoo thiab kev ua tau zoo. Kev siv cov khoom ntxiv hauv cov nplais nplaum yog qhov tseem ceeb hauv kev lag luam niaj hnub no. Cov additives pab txhim kho cov khoom nplaum xws li dej tuav, kev ua haujlwm thiab kev sib raug zoo, ua rau lawv ruaj khov thiab ua haujlwm zoo. HPMC (Hydroxypropyl Methyl Cellulose) yog ib qho piv txwv ntawm ib qho tshuaj ntxiv uas feem ntau siv hauv kev lag luam pobzeb nplaum. Kab lus no qhia txog cov txiaj ntsig ntawm kev siv HPMC hauv kev tsim cov nplais nplaum.
HPMCs yog dab tsi?
Hydroxypropyl methylcellulose yog ib qho derivative ntawm cellulose thiab tsim cov hmoov dawb los yog lub teeb daj. Nws yog non-toxic, tsw thiab muaj cov dej solubility zoo heev. HPMC tau txais los ntawm hydrolysis ntawm cov nroj tsuag fibers los tsim cellulose, uas yog tom qab ntawd hloov kho tshuaj los ntawm kev ntxiv methoxy thiab hydroxypropyl pawg rau cov ether linkages. Nws yog soluble hauv dej, ethanol thiab acetone thiab muaj qee yam khoom ntawm cov organic thiab inorganic compounds. Nws yog dav siv hauv kev lag luam xws li kev tsim kho, tshuaj pleev ib ce, khoom noj khoom haus, tshuaj thiab coatings.
Cov txiaj ntsig ntawm kev siv HPMC hauv cov nplaum nplaum
1. Txhim kho dej tuav
Ib qho txiaj ntsig tseem ceeb ntawm kev siv HPMC hauv cov nplais nplaum yog tias nws txhim kho cov dej tuav. Kev tuav dej yog qhov tseem ceeb hauv cov txheej txheem tsim cov nplaum vim nws ua kom cov nplaum tseem ua haujlwm tau thiab tsis qhuav sai sai. Thaum HPMC ntxiv rau cov nplaum, nws ua ke nrog cov dej molecules los tsim cov gel zoo li sib xws. Lub gel xwm ntawm HPMC xyuas kom meej tias cov nplaum sib tov tseem ntub thiab cohesive, uas txhim kho cov txheej txheem nplaum thiab txhim kho cov pobzeb sib txuas.
2. Txhim kho kev ua haujlwm
Kev siv HPMC hauv cov nplais nplaum txhim kho kev ua haujlwm, uas yog yooj yim npaum li cas cov nplaum sib xyaw, siv thiab kho. Machinability yog qhov tseem ceeb hauv kev tsim khoom raws li nws txiav txim siab qhov ua tau zoo ntawm cov txheej txheem installation. Thaum HPMC ntxiv rau cov nplaum, nws ua raws li cov thickener, uas ua rau muaj qhov sib xws zoo dua thiab tuav tau yooj yim dua. Kev txhim kho qhov sib xws ntawm cov nplaum ua kom ntseeg tau tias nws tseem cohesive thiab tuaj yeem ua tau yooj yim zoo li, molded los yog kis mus rau theem saum npoo los tsim ib tug du nto.
3. Ua kom muaj zog ntxiv
Bond lub zog yog txiav txim los ntawm kev sib txuas ntawm cov substrate (tile) thiab cov nplaum. Siv HPMC hauv cov nplais nplaum ua kom muaj zog ntawm daim ntawv cog lus los ntawm kev ua kom muaj kev sib raug zoo ntawm cov pobzeb thiab cov nplaum. Lub luag haujlwm ntawm HPMC yog txhawm rau txhim kho thaj chaw sib cuag ntawm substrate thiab cov nplaum. Qhov kev sib cuag zoo no ua rau muaj kev sib raug zoo uas tuaj yeem tiv taus siab thiab hnyav dua. Lub zog adhesion muab los ntawm HPMC kom ntseeg tau tias cov vuas nyob hauv qhov chaw txawm tias nyob hauv cov chaw tsheb loj thiab tseem tiv taus cov neeg kho tshuab.
4. Txo shrinkage
Raws li cov nplaum dries, nws shrinks, tsim qhov khoob thiab qhov chaw nruab nrab ntawm cov vuas. Qhov khoob thiab qhov chaw tuaj yeem tshwm tsis pom thiab tseem tso cai rau cov dej noo nkag mus, uas tuaj yeem ua rau cov vuas tev tawm. Siv HPMC hauv cov nplais nplaum ua kom cov nplaum dries maj mam thiab sib npaug, txo qis. Cov txheej txheem kom qhuav qeeb tso cai rau cov nplaum los daws, kom ntseeg tau tias txhua cov pobzeb lays tusyees, txo qhov kev pheej hmoo ntawm qhov khoob vim qhov shrinkage.
5. Txhim kho huab cua tsis kam
Kev siv HPMC hauv cov nplais nplaum tuaj yeem txhim kho huab cua ntawm cov nplaum. HPMC muab ib txheej ntxiv ntawm kev tiv thaiv, kom ntseeg tau tias cov nplaum nplaum tseem nyob zoo txawm tias nyob rau hauv huab cua hnyav. Cov xwm txheej sab nraud xws li qhov kub thiab txias, av noo thiab nag tuaj yeem ua rau cov nplaum nplaum tsis muaj zog thiab txo nws cov txiaj ntsig. HPMC muab cov txheej txheem tiv thaiv uas tiv thaiv cov nplaum los ntawm huab cua hnyav, kom ntseeg tau tias nws tseem siv tau rau lub sijhawm ntev dua.
nyob rau hauv xaus
Ntxiv HPMC rau cov nplais nplaum nplaum muaj qhov zoo tshaj plaws, ua kom cov nplaum nplaum ua haujlwm zoo, ua haujlwm zoo, ruaj khov thiab muaj zog. Cov txiaj ntsig muaj xws li kev txhim kho dej tuav, txhim kho kev ua tau zoo, ua kom muaj zog ntxiv, txo qis shrinkage thiab txhim kho huab cua. Cov txiaj ntsig no tuaj yeem txhim kho qhov ua tau zoo ntawm lub tsev ua haujlwm uas nyob twj ywm thiab ua haujlwm txawm tias huab cua tsis zoo. Vim nws muaj ntau yam zoo, kev siv HPMC hauv cov nplais nplaum tau dhau los ua ib qho ntawm cov pobzeb nplaum tsim kev lag luam. Nws versatility tau ua nws nrov thiab thawj qhov kev xaiv ntawm kev tsim kho cov kws tshaj lij thoob ntiaj teb
Post lub sij hawm: Lub Xya hli ntuj-28-2023