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Hydroxypropyl methyl cellulose mu simenti ndi gypsum based plaster

HPMC Hydroxypropyl methyl cellulose mu matope a simenti ndi gypsum slurry, makamaka imagwira ntchito yosungira madzi ndi kukhuthala, imatha kusintha bwino kumamatira ndi kukana kwa slurry.

Kutentha kwa mpweya, kutentha ndi kuthamanga kwa mphepo kungakhudze kuchuluka kwa madzi mumatope a simenti ndi gypsum.Chifukwa chake munyengo zosiyanasiyana, kuwonjezera hydroxypropyl methyl cellulose kuchuluka komweko kwazinthu zosungira madzi kumakhala ndi zosiyana.Pakumanga konkire, mphamvu yosungira madzi ya slurry imatha kusinthidwa ndikuwonjezera kapena kuchepetsa kuchuluka kwa HPMC.Kusungidwa kwa madzi kwa methyl cellulose ether pa kutentha kwakukulu ndi chizindikiro chofunikira kusiyanitsa ubwino wa methyl cellulose ether.

Zinthu zabwino kwambiri za hydroxypropyl methyl cellulose zimatha kuthetsa vuto la kusunga madzi kutentha kwambiri.M'nyengo yozizira kwambiri, makamaka m'madera otentha ndi owuma ndi zomangamanga zopyapyala kumbali yadzuwa, kufunikira kwapamwamba kwa HPMC kupititsa patsogolo kusungirako madzi kwa slurry;hydroxypropyl methyl cellulose (HPMC), kufanana ndi zabwino kwambiri, ndi mpweya ndi mpweya hydroxypropyl magulu wogawana anagawira pamodzi mapadi unyolo, akhoza kusintha hydroxyl ndi efa mpweya ndi madzi pa kiyi kugwirizanitsa mawonekedwe haidrojeni chomangira luso, kupanga madzi aulere a hydration, kuti muzitha kuwongolera bwino nyengo yotentha yomwe imayambitsa chinyontho kuti chisasunthike, Kukwaniritsa kusungirako madzi ambiri.

Mkulu khalidwe la hydroxypropyl methyl mapadi akhoza uniformly ndi mogwira kumwazikana mu matope simenti ndi pulasitala mankhwala, ndi phukusi onse olimba particles, ndi kupanga wosanjikiza wa kunyowetsa filimu, chinyezi m'munsi kwa nthawi yaitali pang'onopang'ono anamasulidwa, ndi inorganic cementitious zinthu hydration anachita. , kuti awonetsetse mphamvu ya mgwirizano ndi mphamvu yopondereza ya zipangizo.

Pomanga, kuti akwaniritse zotsatira za kusunga madzi, ayenera kuwonjezera apamwamba HPMC mankhwala malinga ndi chilinganizo, apo ayi, padzakhala kuyanika mofulumira kwambiri chifukwa chosakwanira hydration, kuchepetsa mphamvu, akulimbana, ng'oma dzenje ndi khalidwe kukhetsa. mavuto, komanso kuonjezera kuvuta kwa ogwira ntchito yomanga.Pamene kutentha kumachepa, kuchuluka kwa madzi a HPMC kumatha kuchepetsedwa pang'onopang'ono, ndipo zotsatira zofanana zosungira madzi zimatha kupezeka.


Nthawi yotumiza: Dec-21-2021