Hydroxypropyl methyl cellulose mu simenti ndi gypsum based plaster

HPMC Hydroxypropyl methyl cellulosemumatope a simenti ndi gypsum slurry, makamaka amatenga gawo la kusunga madzi ndi kukhuthala, amatha 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.

Zabwino kwambirihydroxypropyl methyl cellulosemankhwala angapo amatha kuthetsa vuto la kusunga madzi pansi pa kutentha kwakukulu. Mu nyengo kutentha, makamaka m`madera otentha ndi youma ndi woonda wosanjikiza yomanga mbali dzuwa, kufunika mkulu khalidwe HPMC kusintha madzi posungira 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 ophatikizana wa haidrojeni chomangira luso, kupanga madzi aulere a hydration, kuti bwino kulamulira kutentha kutentha chifukwa cha nthunzi chifukwa cha chinyontho.

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

Pomanga, kuti tikwaniritse zotsatira za kusunga madzi, muyenera kuwonjezera khalidwe lapamwambaMtengo wa HPMCmankhwala molingana ndi chilinganizo, apo ayi, padzakhala kuyanika mofulumira kwambiri chifukwa cha kusakwanira hydration, kuchepetsa mphamvu, akulimbana, dzenje ng'oma ndi kukhetsa mavuto khalidwe, komanso kuonjezera zovuta ntchito zomangamanga. Pamene kutentha kumachepa, kuchuluka kwa madzi a HPMC kumatha kuchepetsedwa pang'onopang'ono, ndipo zotsatira zofanana zosungira madzi zimatha kupezeka.