Hydroxypropyl methylcellulose (HPMC) ndi polima pawiri ntchito zomangira, makamaka gypsum moyang'anizana pulasitala, kumene amagwira ntchito yofunika. Monga chowonjezera, HPMC imatha kusintha magwiridwe antchito, kusunga madzi ndi kumamatira kwa gypsum moyang'anizana ndi pulasitala, chifukwa chake imagwiritsidwa ntchito kwambiri pomanga ndi kukongoletsa.
1. Makhalidwe oyambira a HPMC
HPMC ndi non-ionic mapadi efa ndi madzi solubility wabwino ndi thickening katundu. Ikhoza kusungunuka mofulumira m'madzi kuti ipange madzi amtundu wa colloidal, ndipo imakhala ndi zomatira bwino, zokometsera, kupanga mafilimu ndi kusunga madzi. Makhalidwewa amapangitsa kuti HPMC ikhale yogwiritsidwa ntchito kwambiri muzomangira, makamaka zoyenera kugwiritsidwa ntchito pazinthu za gypsum.
Makhalidwe akulu a HPMC ndi awa:
Kusungirako madzi: HPMC imatha kusunga chinyezi mu gypsum moyang'anizana ndi pulasitala, potero kukulitsa nthawi yotseguka komanso nthawi yogwiritsira ntchito zinthuzo.
Kukhuthala: Monga chokhuthala, HPMC imatha kukulitsa kukhuthala kwa pulasitala, kupewa kugwa, komanso kukulitsa kusungunuka.
Lubricity: Mafuta a HPMC amawongolera kamvekedwe ka pulasitala ndikupangitsa kuti ntchito yomanga ikhale yosavuta.
Katundu wopangira filimu: Itha kupanga filimu yoteteza pamwamba pa pulasitala, kuwongolera kukana kwa pulasitala.
2. Kachitidwe ka HPMC mu gypsum moyang'anizana ndi pulasitala
Pambuyo powonjezera HPMC ku gypsum moyang'anizana ndi pulasitala, zinthu zakuthupi zimasinthidwa makamaka pazinthu izi:
Kupititsa patsogolo kusunga madzi: Panthawi yomanga gypsum moyang'anizana ndi pulasitala, ngati kutayika kwa madzi kuli mofulumira kwambiri, kumayambitsa kuuma kosagwirizana, kusweka ndi kuchepetsa mphamvu. HPMC akhoza kupanga chabwino hydration filimu mu pulasitala, kuchepetsa evaporation mlingo wa madzi, kuti pulasitala akhoza kukhalabe madzi okwanira pa kuyanika ndondomeko, kuonetsetsa yunifolomu kuumitsa, potero kupewa m'badwo wa ming'alu.
Kuwongolera kumamatira: HPMC imatha kupanga filimu yopyapyala pamwamba pa pulasitala, yomwe imatha kukulitsa zomatira zikakumana ndi gawo lapansi, kuti kumamatira kwa pulasitala pakhoma kumawonjezeka. Makamaka pazigawo za porous ndi youma, mphamvu yosungira madzi ya HPMC imathanso kulepheretsa gawo lapansi kuti lisamwe madzi mwachangu, potero kumapangitsa kuti mgwirizano ukhale wabwino.
Limbikitsani kukana ming'alu: pulasitala yoyang'anizana ndi gypsum imatha kung'ambika chifukwa cha kusintha kwa kutentha ndi chinyezi.Mtengo wa HPMC amachepetsa kuyanika shrinkage mlingo ndi kusintha evaporation mlingo wa madzi, potero bwino kuchepetsa chiopsezo ming'alu mu pulasitala wosanjikiza. Panthawi imodzimodziyo, filimu ya colloid yopangidwa ndi HPMC ikhoza kuperekanso chitetezo china chotsutsana ndi kupasuka kwa pulasitala.
Kupititsa patsogolo magwiridwe antchito: HPMC imatha kukulitsa kukhuthala ndi pulasitiki ya pulasitala, kupangitsa kuti ikhale yosavuta kugwiritsa ntchito potsuka ndi kusanja. HPMC bwino operability wa pulasitala, ndi ogwira ntchito yomanga angathe molondola kulamulira makulidwe ndi flatness, amene amathandiza kupeza bwino kutsirizitsa zotsatira.
3. HPMC bwino ntchito ya gypsum moyang'anizana pulasitala
Kuphatikiza kwa HPMC kuli ndi zosintha zambiri pamachitidwe a gypsum akukumana ndi pulasitala, kuphatikiza:
Kusintha kwa Rheological: HPMC imatha kukulitsa kukhuthala kwa pulasitala, kuwongolera kutulutsa kwa pulasitala, kupewa zovuta, ndikuwongolera magwiridwe antchito a pulasitala.
Kulimbana ndi chisanu: Kanema wa colloid wopangidwa ndi HPMC amateteza pulasitala kumlingo wakutiwakuti, kuteteza pulasitala kuti isaundane ndi kusweka m'malo otentha kwambiri, ndikuwongolera kukana kwa chisanu.
Kulimbitsa kukana kwa shrinkage:Mtengo wa HPMC kumawonjezera chinyezi mu pulasitala, kumachepetsa vuto la kuchepa kwa madzi chifukwa cha kutuluka kwa nthunzi, ndipo kumapangitsa kuti pulasitala ikhale yokhazikika komanso yosagwedezeka kwambiri.
Kumamatira kwabwino: Kumangirira kwa HPMC kumatha kupititsa patsogolo kumamatira kwa pulasitala pamwamba pa gawo lapansi, ndikupangitsa kuti zokutirako zisagwe.
4. Kusamala pogwiritsira ntchito HPMC
Ngakhale HPMC ili ndi zabwino zambiri za gypsum moyang'anizana ndi pulasitala, zinthu zotsatirazi ziyenera kudziwidwanso pakugwiritsa ntchito kwake:
Kuwongolera kuchuluka kwa kuchuluka: Kuchulukitsa kwa HPMC kumapangitsa pulasitala kukhala yomata kwambiri, zomwe zimapangitsa kuti zikhale zovuta kusalala, zomwe zimakhudza momwe ntchito yomanga. Nthawi zambiri, kuchuluka kwa HPMC kuyenera kuyendetsedwa mkati mwa 0.1% -0.5%, ndikusinthidwa malinga ndi zosowa zenizeni.
Ngakhale kusakaniza:Mtengo wa HPMC iyenera kugwedezeka mokwanira ikasakanizidwa ndi zinthu monga gypsum kuti zitsimikizire kubalalitsidwa kofanana ndi magwiridwe antchito ofanana. HPMC ikhoza kusungunuka m'madzi poyamba, kenako kuwonjezeredwa ku gypsum kuti isakanike, kapena ikhoza kusakanikirana mofanana pa siteji ya ufa wouma.
Kugwirizana ndi zina zowonjezera: Mu gypsum moyang'anizana ndi pulasitala, HPMC nthawi zambiri amagwiritsidwa ntchito ndi zina zowonjezera, monga zochepetsera madzi, zosungira madzi, ndi zina zotero.
5. Kufunika kwa HPMC pamakampani
Mu gypsum moyang'anizana ndi pulasitala ndi zida zina zomangira, HPMC, monga chowonjezera chachikulu, imagwira ntchito yofunika kwambiri pakuwongolera magwiridwe antchito azinthu chifukwa chakusungidwa bwino kwa madzi, kumamatira, kukhuthala komanso kukana ming'alu. M'zaka zaposachedwa, pakuwonjezeka kwa kufunikira kwa zida zomangira zobiriwira, mawonekedwe oteteza zachilengedwe a HPMC apangitsanso kuti pang'onopang'ono izikondedwa ndi msika. M'nyumba zamakono, HPMC sikuti imangowonjezera kugwiritsa ntchito gypsum moyang'anizana ndi pulasitala, komanso imapangitsa kuti ntchito yomanga ikhale yabwino komanso imathandizira kupititsa patsogolo luso la zomangamanga.
Kugwiritsa ntchito kwa HPMC mu gypsum moyang'anizana ndi pulasitala sikumangowonjezera kusunga madzi, kumamatira komanso kukana kwa zinthuzo, komanso kumapangitsanso ntchito yomanga, ndikupangitsa kuti ikhale chowonjezera chofunikira pakumanga. Makhalidwe apadera a HPMC komanso kusintha kwa magwiridwe antchito amitundu yambiri kwapangitsa kuti ikhale yofunika kwambiri pazomangira, kupereka chithandizo champhamvu chaukadaulo pakumaliza kwanyumba zapamwamba kwambiri, zolimba kwambiri. M'tsogolomu, ndikukula kosalekeza kwaukadaulo wa zomangamanga, mwayi wogwiritsa ntchito HPMC muzinthu zopangidwa ndi gypsum udzakhala wokulirapo.
Nthawi yotumiza: Nov-19-2024