Kodi mungasankhe bwanji hydroxypropyl methylcellulose pa matope a plaster?

pH ya zinthu zopangidwa ndi gypsum ndi acidic kapena neutral. Tsopano pali mitundu iwiri ya kapangidwe kake.hydroxypropyl methylcellulosepamsika: cellulose yosungunuka pang'onopang'ono ndi cellulose yachangu (S). Cellulose yachangu si yoyenera machitidwe a gypsum. Zogulitsa, kusungunuka kwake kumakhala kotsika kwambiri pansi pa acidity kapena neutral, ndipo hydroxypropyl methylcellulose yosungunuka pang'onopang'ono imatha kusungunuka muzinthu za gypsum, koma cellulose yosungunuka pang'onopang'ono ili ndi vuto lalikulu, ndikosavuta kusonkhana (pamene gypsum matope asunthidwa pakhoma kwa kanthawi kochepa, madontho ang'onoang'ono a granular amakonda kuwonekera pamwamba). Pakadali pano, muzinthu za gypsum, makamaka mu gypsum matope opopera ndi makina, ndikofunikira kuti cellulose ether ifalitsidwe kwathunthu ndikusungunuka munthawi yochepa kwambiri, zomwe zimatipangitsa kuti tichite kafukufuku wozama pakupanga ether ya cellulose yosungunuka pang'onopang'ono. Chithandizo cha pamwamba (osati chotchedwa kuwonjezera zowonjezera zina mu ether ya cellulose yachizolowezi), kuti igwirizane ndi dongosolo la gypsum matope. Hydroxypropyl methylcellulose ether yokhala ndi chithandizo chakuya pamwamba imatha kukhala ndi nthawi yokhazikika yosungunuka komanso mawonekedwe abwino amakina mu gypsum matope, ndipo imatha kusintha kwambiri njira yolinganiza ndi kumaliza matope.

Chopopera cha gypsum chopopera ndi makina nthawi zambiri chimagwiritsa ntchito ether ya hydroxypropyl methylcellulose yokhala ndi kukhuthala kochepa pakati pa 20,000 ndi 75,000, ndipo kuchuluka kowonjezera nthawi zambiri kumakhala 0.2% mpaka 0.4%. Nthawi yokhazikitsira chopopera cha gypsum chopopera ndi makina imayendetsedwa pafupifupi ola limodzi. Timagwiritsa ntchito gypsum mortar yield stress, plastic viscosity, thixotropy, rheology ndi kusinthasintha kwa slurry kuti tiwone momwe zinthu za gypsum mortar zimagwirira ntchito.

Tikuganizira za kuwongolera kwabwino kwa njira yochotsera sulfurization gypsum source calcining, zodzaza (simenti, fine aggregate, heavy calcium powder) ndi zosakaniza (zingagwiritsidwe ntchito mu dispersive latex powder, hydroxypropyl methyl cellulose ether, expanded perlite, gypsum retarder) Kusankha njira yonse yazinthu ndikotsika mtengo.

Hydroxypropyl methyl cellulose etherChifukwa cha matope a gypsum, matopewa ali ndi chiyero chapamwamba komanso amatha kugwira ntchito bwino, ndipo makasitomala ambiri amawayamikira.