Hydroxypropyl methyl cellulose i loko o ka sima a me ka gypsum plaster based

HPMC Hydroxypropyl methyl cellulosei loko o ka mortar sima a me ka gypsum slurry, ka mea nui e pāʻani i ka hana o ka paʻa ʻana o ka wai a me ka mānoanoa, hiki ke hoʻomaikaʻi maikaʻi i ka adhesion a me ka pale ʻana o ka slurry.

Hiki i ka ea wela, ka mahana a me ka makani ke kaomi i ka nui o ka evaporation o ka wai i loko o ka pahu sima a me nā huahana gypsum. No laila i nā kau like ʻole, ʻo ka hoʻohui ʻana i ka hydroxypropyl methyl cellulose i ka nui like o ka hopena paʻa wai o ka huahana he mau ʻokoʻa. I ke kūkulu ʻia ʻana, hiki ke hoʻoponopono ʻia ka hopena paʻa wai o ka slurry ma ka hoʻonui a hoʻemi ʻana i ka nui o ka HPMC. ʻO ka paʻa ʻana o ka wai o ka methyl cellulose ether i ka wela kiʻekiʻe he hōʻailona koʻikoʻi ia e ʻike ai i ka maikaʻi o ka methyl cellulose ether.

maikaʻi loahydroxypropyl methyl celluloseHiki i nā huahana moʻo ke hoʻoponopono pono i ka pilikia o ka mālama ʻana i ka wai ma lalo o ka wela kiʻekiʻe. I ke kau wela kiʻekiʻe, ʻoi aku ka maikaʻi ma nā wahi wela a maloʻo a me ke kūkulu ʻia ʻana o ka papa lahilahi ma ka ʻaoʻao o ka lā, pono ka HPMC kiʻekiʻe e hoʻomaikaʻi i ka paʻa ʻana o ka wai o ka slurry; ʻO ka hydroxypropyl methyl cellulose (HPMC), maikaʻi loa ke kūlike, ʻo ia ka oxygen a me ka oxygen hydroxypropyl pūʻulu i puʻunaue like ʻia ma ke kaulahao cellulose, hiki ke hoʻomaikaʻi i ka hydroxyl a me ka ether oxygen a me ka wai ma ke kī e pili ana i ke ʻano o ka hydrogen bonding hiki, hana i ka wai manuahi o ka hydration, i mea e hoʻomalu pono ai i ka wā wela i hoʻokumu ʻia e ka wai e evaporate, Loaʻa ka paʻa wai kiʻekiʻe.

High quality o hydroxypropyl methyl cellulose hiki uniformly a me ka hoʻopuehu maikaʻi i loko o ka sima a me ka plaster huahana, a puʻupuʻu i nā mea paʻa paʻa a pau, a hana i ka papa o ka wetting kiʻiʻoniʻoni, ka makū i loko o ke kumu no ka manawa lōʻihi hoʻokuʻu mālie, a inorganic cementitious mea hydration hopena. , i mea e hōʻoia ai i ka ikaika pili a me ka ikaika compressive o nā mea.

I ke kūkulu ʻana, i mea e hoʻokō ai i ka hopena o ka mālama wai, pono e hoʻohui i ke ʻano kiʻekiʻeHPMCʻO nā huahana e like me ke ʻano, inā ʻaʻole, e maloʻo wikiwiki ʻia ma muli o ka lawa ʻole o ka hydration, ka emi ʻana o ka ikaika, ka haki ʻana, ka pahu pahu a me ka hoʻoheheʻe ʻana i nā pilikia maikaʻi, akā hoʻonui i ka paʻakikī o ka hana ʻana o nā limahana. I ka emi ʻana o ka mahana, hiki ke hoʻemi ʻia ka nui o ka wai HPMC, a hiki ke hoʻokō ʻia ka hopena paʻa wai like.