Yadda ake zaɓar hydroxypropyl methylcellulose don turmi na plaster?

Matsakaicin pH na kayayyakin gypsum yana da acidic ko tsaka tsaki. Yanzu akwai nau'ikan matakin gini guda biyu.hydroxypropyl methylcellulosea kasuwa: cellulose mai narkewa a hankali da cellulose mai sauri (S). Cellulose mai sauri bai dace da tsarin gypsum ba. Samfuran, narkewar yana da rauni sosai a ƙarƙashin yanayi mai acidic ko tsaka tsaki, kuma hydroxypropyl methylcellulose mai narkewa a hankali ana iya narkar da shi a cikin samfuran gypsum, amma cellulose mai narkewa a hankali yana da babban rashi, yana da sauƙin haɗuwa (lokacin da gypsum Bayan an motsa turmi a bango na ɗan gajeren lokaci, ƙananan tabo na granular sukan bayyana a saman). A halin yanzu, a cikin kayayyakin gypsum, musamman a cikin turmi na gypsum da aka fesa da injin, ana buƙatar cewa za a iya wargaza cellulose ether gaba ɗaya kuma a narkar da shi cikin ɗan gajeren lokaci, wanda ke buƙatar mu gudanar da bincike mai zurfi kan tsarin samar da cellulose ether mai narkewa a hankali. Maganin saman (ba abin da ake kira ƙara wasu ƙari a cikin cellulose ether na yau da kullun ba), don daidaitawa da tsarin turmi na gypsum. Hydroxypropyl methylcellulose ether tare da maganin saman zurfi na iya samun lokacin narkewa mai karko da kyawawan kaddarorin injiniya a cikin turmi na gypsum, kuma yana iya inganta matakin da kammala aikin turmi sosai.

Turmin gypsum da aka fesa ta injina gabaɗaya yana amfani da ƙarancin ɗanko hydroxypropyl methylcellulose ether tsakanin 20,000 da 75,000, kuma adadin ƙarin yawanci shine 0.2% zuwa 0.4%. Lokacin saita turmin gypsum da aka fesa ta injin ana sarrafa shi da kimanin awa 1. Muna amfani da matsin lamba na turmin gypsum, ɗanko na filastik, thixotropy, rheology da daidaiton slurry don tantance aikin samfuran turmin gypsum.

Muna la'akari da ingancin sarrafa tsarin gypsum na desulfurization, abubuwan cikawa (siminti, ƙaramin taro, foda mai kauri na calcium) da abubuwan haɗawa (ana iya amfani da su a cikin foda na latex, hydroxypropyl methyl cellulose ether, perlite da aka faɗaɗa, gypsum retarder) Zaɓin tsarin samfurin gabaɗaya mai inganci.

Hydroxypropyl methyl cellulose etherdomin turmin gypsum yana da tsarki sosai kuma yana da kyau wajen aiki, kuma abokan cinikin turmin gypsum sun yaba masa sosai.