ʻO ka inoa Kina o HPMC he hydroxypropyl methylcellulose. He non-ionic a hoʻohana pinepine ʻia ma ke ʻano he mea mālama wai i loko o ka mortar maloʻo. ʻO ia ka mea maʻamau i hoʻohana ʻia e mālama i ka wai i ka mortar. ʻO kahi huahana ether e pili ana i ka polysaccharide i hana ʻia e ka alkalization a me ka etherification. ʻAʻohe ona uku ponoʻī, ʻaʻole pane me nā ion i hoʻopaʻa ʻia i loko o ka mea gelling, a paʻa ka hana. ʻOi aku ka haʻahaʻa o ke kumukūʻai ma mua o nā ʻano cellulose ethers ʻē aʻe, no laila ua hoʻohana nui ʻia i loko o ka mortar maloʻo.
Ka hana o ka hydroxypropyl methylcellulose: Hiki iā ia ke mānoanoa i ka pahū hou i hui pū ʻia e loaʻa i kahi viscosity pulu a pale i ka hoʻokaʻawale ʻana. (Ka mānoanoa) ʻO ka paʻa ʻana o ka wai ka mea nui loa, e kōkua ana i ka mālama ʻana i ka nui o ka wai manuahi i loko o ka pahū, a ma hope o ke kūkulu ʻia ʻana o ka pahu, ʻoi aku ka manawa o ka mea cementitious e hydrate. (Water paʻa) Loaʻa iā ia nā mea e komo ai i ka ea, hiki ke hoʻokomo i nā ʻōhū ea like ʻole a maikaʻi hoʻi e hoʻomaikaʻi ai i ke kūkulu ʻana i ka momi.
ʻOi aku ka kiʻekiʻe o ka viscosity o ka hydroxypropyl methylcellulose ether, ʻoi aku ka maikaʻi o ka hana paʻa wai. No ka huahana like, ʻokoʻa loa nā hopena viscosity i ana ʻia e nā ʻano hana like ʻole, a ua pālua ʻia kekahi. No laila, i ka hoʻohālikelike ʻana i ka viscosity, pono e hana ʻia ma waena o nā ʻano hoʻokolohua like, me ka mahana, rotor, etc.
E pili ana i ka nui o ka ʻāpana, ʻoi aku ka maikaʻi o ka ʻāpana, ʻoi aku ka maikaʻi o ka paʻa ʻana o ka wai. Ma hope o ka hui ʻana o nā ʻāpana nui o ka cellulose ether me ka wai, e hoʻoheheʻe koke ka ʻili a hana i kahi gel e hoʻopili ai i ka mea e pale ai i nā molekala wai mai ka hoʻomau ʻana i ka infiltrate. I kekahi manawa, ʻaʻole hiki ke hoʻopuehu like ʻia a hoʻoheheʻe ʻia ma hope o ka hoʻoulu ʻana i ka wā lōʻihi, e hana ana i kahi hopena flocculent ao a i ʻole agglomeration. Hoʻopilikia nui ia i ka paʻa wai o ka cellulose ether, a ʻo ka solubility kekahi o nā kumu no ke koho ʻana i ka cellulose ether. ʻO ka maikaʻi kekahi mea nui o ka methyl cellulose ether. ʻO ka MC i hoʻohana ʻia no ka pauka maloʻo maloʻo e koi ʻia i ka pauka, me ka haʻahaʻa o ka wai, a ʻo ka fineness hoʻi e koi i ka 20% -60% o ka nui o ka nui ma lalo o 63um. Hoʻopili ka fineness i ka solubility o ka hydroxypropyl methylcellulose ether. He mea maʻamau ka MC Coarse, a he maʻalahi ke hoʻoheheʻe i ka wai me ka ʻole o ka agglomeration, akā lohi loa ka dissolution rate, no laila ʻaʻole kūpono ia no ka hoʻohana ʻana i ka lepo maloʻo. I loko o ka lepo lepo maloʻo, ua hoʻopuehu ʻia ʻo MC ma waena o nā mea hoʻoheheʻe ʻia e like me ka aggregate, ka mea hoʻopiha maikaʻi a me ka sima, a ʻo ka pauka maikaʻi wale nō e hiki ke pale i ka methyl cellulose ether agglomeration i ka hui ʻana me ka wai.
ʻO ka ʻōlelo maʻamau, ʻoi aku ka kiʻekiʻe o ka viscosity, ʻoi aku ka maikaʻi o ka hopena paʻa wai. Eia naʻe, ʻoi aku ka kiʻekiʻe o ka viscosity a ʻoi aku ka kiʻekiʻe o ke kaumaha molekala o MC, ʻo ka emi ʻana o kona solubility e loaʻa i ka hopena maikaʻi ʻole i ka ikaika a me ka hana ʻana o ka mortar. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka maopopo o ka hopena mānoanoa ma ka mortar, akā ʻaʻole pololei ia. ʻO ke kiʻekiʻe o ka viscosity, ʻoi aku ka viscous o ka mortar pulu, ʻo ia hoʻi, i ka wā o ke kūkulu ʻana, ʻike ʻia ʻo ia e pili ana i ka scraper a me ka hoʻopili kiʻekiʻe i ka substrate. Akā ʻaʻole kōkua ka hoʻonui ʻana i ka ikaika o ke kūkulu ʻana o ka mortar pulu ponoʻī. ʻO ia hoʻi, i ka wā o ke kūkulu ʻana, ʻaʻole maopopo ka hana anti-sag. Ma kahi ʻē aʻe, ʻoi aku ka maikaʻi o ka hoʻomaikaʻi ʻana i ka ikaika o ka mortar pulu.
ʻO ka paʻa ʻana o ka wai o HPMC e pili pū ana me ka mahana i hoʻohana ʻia, a ke emi nei ka paʻa wai o ka methyl cellulose ether me ka piʻi ʻana o ka mahana. Eia nō naʻe, i ka hoʻohana ʻana i nā mea maoli, hoʻohana pinepine ʻia ka mīkini pauka maloʻo i nā substrate wela i nā wela kiʻekiʻe (ʻoi aku ma mua o 40 degere) i nā wahi he nui, e like me ka hoʻopili ʻana o ka pā o waho ma lalo o ka lā i ke kauwela, e hoʻolōʻihi pinepine i ka mālama ʻana i ka sima a ka paakiki o ka pauda maloo. ʻO ka emi ʻana o ka nui o ka paʻa ʻana o ka wai e alakaʻi i ka manaʻo maopopo e pili ana ka hana a me ka pale ʻana i ka māwae, a he mea koʻikoʻi loa ia e hōʻemi i ka mana o nā mea wela ma lalo o kēia ʻano. Ma kēia manaʻo, ua manaʻo ʻia nā mea hoʻohui methyl hydroxyethyl cellulose ether i kēia manawa ma mua o ka hoʻomohala ʻenehana. ʻOiai ua hoʻonui ʻia ka nui o ka methyl hydroxyethyl cellulose (ke kumu kauwela), ʻaʻole hiki ke hoʻokō i nā pono o ka hoʻohana. Ma o kekahi hana kūikawā ma ka MC, e like me ka hoʻonuiʻana i ke kiʻekiʻe o ka etherification, a me nā mea'ē aʻe, hiki ke mālamaʻia ka hopena o ka mālamaʻana i ka wai i kahi mahana kiʻekiʻe, i hiki ai ke hāʻawi i ka hana maikaʻi ma lalo o nā kūlana paʻakikī.
ʻO ka maʻamau, loaʻa i ka HPMC kahi mahana gel, hiki ke hoʻokaʻawale ʻia i 60 mau ʻano, 65 ʻano, a me 75 mau ʻano. No nā ʻoihana e hoʻohana ana i ke one kahawai no ka mortar maʻamau, ʻoi aku ka maikaʻi o ka hoʻohana ʻana i ka HPMC 75-type me kahi mahana gel kiʻekiʻe. ʻAʻole pono e kiʻekiʻe ka nui o ka HPMC, inā ʻaʻole ia e hoʻonui i ka koi wai o ka mortar, pili ia i ka trowel, a lōʻihi loa ka manawa hoʻonohonoho, e pili ana i ka hana. Hoʻohana nā huahana mortar like ʻole i ka HPMC me nā viscosity ʻokoʻa, a mai hoʻohana wale i ka HPMC kiʻekiʻe-viscosity. No laila, ʻoiai he maikaʻi nā huahana hydroxypropyl methylcellulose, mahalo ʻia lākou ke hoʻohana maikaʻi ʻia. ʻO ke koho ʻana i ka HPMC kūpono ke kuleana nui o nā limahana ʻoihana ʻoihana.
Ka manawa kau: Apr-07-2023