Udaka oluxubile oluhlanganisiwe: Udaka oluxubile luhlobo losekhulile, oluhlangene olunhle, phakathi kwamanzi, futhi ngokuya ngezakhiwo zezinto ezithile, ngokukalwa esiteshini esithile, kuxutshwe, ukuthuthwa endaweni lapho Iloli liyasetshenziswa, futhi lingene esitolo esikhethekile esitsheni bese lisebenzisa ingxube emanzi eqediwe yesikhathi esishiwo.
I-Hydroxypropylm methylcellulose isetshenziswa njenge-ejenti yokugcina amanzi ngodaka kasimende kanye ne-retarder yempompo kadaka. Endabeni ye-gypsum njenge-binder yokuthuthukisa uhlelo lokusebenza lwe-application kanye nesikhathi esandisa khona, ukugcinwa kwamanzi kwe-HPMC kuvimbela ama-slurry kusuka ekuqhekekeni ngokushesha okukhulu ngemuva kokomiswa, futhi kuthuthukise amandla ngemuva kokuqina. Ukugcinwa kwamanzi kuyindawo ebalulekile ye-hydroxypropylllylylylylyly hpmc, futhi futhi kungukukhathazeka kwabakhiqizi abaningi basemaster-mix abaxuba abamanzi. Izici ezithinta umphumela wokugcinwa kwamanzi ngodaka oluxutshwe olumanzi lubandakanya inani le-HPMC elingeziwe, ukubonwa kwe-HPMC, ukubusa kwezinhlayiya kanye nokushisa kwendawo yokusebenzisa.
Kunemisebenzi emithathu eyinhloko ye-hydroxypropyllylyll hpmc ku-wortar emanzi, elinye lamandla okubamba amanzi, elinye ithonya ekuguquguqukeni kanye ne-twixotropy yodaka olumanzi, kanti lwesithathu ukusebenzisana nosimende. Ukugcinwa kwamanzi kwe-cellulose ether kuya ngesilinganiso sokutholwa kwamanzi kwesisekelo, ukwakheka kodaka, ukushuba kongqimba lwesidakamizwa, ukufunwa kwamanzi ngodaka, kanye nesikhathi sokusetha. Lapho kuphakama okusobala kwe-hydroxypropylllym methylcellulose, ngcono ukugcinwa kwamanzi.
Izici ezithinta ukugcinwa kwamanzi kodaka oluxutshwe namanzi kufaka i-cellulose ether vispelity, inani lokungezelela, usayizi wezinhlayiyana kanye nokushisa. Lapho kukhuphuka khona i-viscose ether, kungcono ukugcinwa kwamanzi. I-Viscosity iyipharamitha ebalulekile yokusebenza kwe-HPMC. Ngomkhiqizo ofanayo, imiphumela yokusebenzisa izindlela ezahlukahlukene ukukala ukubonakala kwehlukahluka kakhulu, futhi abanye banegebe eliphindwe kabili. Ngakho-ke, ukuqhathanisa kwe-viscosity kumele kwenziwe ngendlela efanayo yokuhlola, kufaka phakathi izinga lokushisa, i-spindle, njll.
Ngokuvamile, kuphakama i-viscosity, kungcono ukugcinwa kwamanzi. Kodwa-ke, ukukhuphuka kwesisindo esiphakeme, isisindo esiphakeme se-HPMC kanye ne-solubity ye-HPMC, enomthelela ongemuhle emandleni nasekwenzeni kokwakha kodaka. Lapho kuphakama i-viscosity, kusobala kakhulu umphumela wokuqina wodaka, kepha ahlobene ngqo. Lapho esekhuphuka i-viscosity, i-viscous mores ngodaka olumanzi, ingcono ukusebenza kwezokwakha, ukusebenza kwesikhafu se-viscous kanye nokunamathela ku-substrate. Kodwa-ke, amandla esandayo enhlaka kadaka olumanzi uqobo alusizi. Lezi zakhiwo ezimbili azinawo ukusebenza okusobala kwe-anti-sag. Ngokuphambene nalokho, ukubukeka okuphakathi nendawo okuphansi kodwa okuguquliwe i-hydroxypropyllylyly methylcellulose kusebenza kahle kakhulu ekuthuthukiseni amandla ahlelekile ngodaka olumanzi.
Lapho imali enkulu ye-cellulose ether eyengezwe ku-PMC emanzi udaka, okungcono ukugcinwa kwamanzi, kanye nokuphakama okuphezulu, ukugcinwa kwamanzi kangcono. Ubuhle futhi kuyinkomba yokusebenza ebalulekile ye-hydroxypropylylylylylylylyl.
Ubumsulwa be-hydroxypropylllylyly buye bube nethonya elithile ekugcinweni kwalo kwamanzi. Ngokuvamile, i-hydroxypropyll methylcellulose enokubonakala okufanayo nobunzima obuhlukile, incane ubumsulwa, incane ukugcinwa kwamanzi ngaphansi kwenani elifanayo lezengezo. okungcono.
Udaka oluxutshwe olumanzi, inani lokungezwa le-cellulose ether hpmc liphansi kakhulu, kepha lingathuthukisa kakhulu ukusebenza kosuku lwamanzi, futhi yisengezo esikhulu esithinta kakhulu ukusebenza ngodaka. Ukukhetha okufanele kwe-hydroxypropyllylylylylyly, ukusebenza kodumo omanzi kuthinteka kakhulu.
Isikhathi Sokuthumela: APR-25-2023