ʻO ka inoa Kina o HPMC he hydroxypropyl methylcellulose.ʻAʻole ionic a hoʻohana pinepine ʻia e like me kahi 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 ke kaʻina hana o ka HPMC he huahana polysaccharide-based ether i hana ʻia e ka alkalization a me ka etherification o ka pulupulu pulupulu (domestic).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 pahū, 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 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.ʻO ka viscosity kahi mea koʻikoʻi o ka hana HPMC.I kēia manawa, hoʻohana nā mea hana HPMC like ʻole i nā ʻano hana like ʻole a me nā mea hana e ana i ka viscosity o HPMC.ʻO nā ala nui ʻo HaakeRotovisko, Hoppler, Ubbelohde a me Brookfield.
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 hoʻāʻo like, me ka mahana, rotor, a me nā mea ʻē aʻe.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 pono e lilo i pauka, me ka wai haʻahaʻa haʻahaʻa, a ʻo ka fineness hoʻi e koi ai 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.Ke hoʻohui ʻia ʻo MC me ka wai e hoʻoheheʻe i nā agglomerates, paʻakikī loa ka hoʻopuehu a hoʻoheheʻe.ʻAʻole hoʻopau wale ka maikaʻi o ka MC, akā e hōʻemi ana i ka ikaika kūloko o ka mortar.Ke hoʻohana ʻia kēlā ʻano mea maloʻo maloʻo ma kahi ākea, e hoʻemi nui ʻia ka wikiwiki o ka hoʻōla ʻana o ka lepo maloʻo kūloko, a e ʻike ʻia nā māwae ma muli o nā manawa hoʻōla ʻokoʻa.No ka mortar sprayed me ka mechanical construction, ʻoi aku ka kiʻekiʻe o ke koi no ka fineness ma muli o ka pōkole o ka hui ʻana.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, ma nā noi waiwai maoli, hoʻohana pinepine ʻia ka mīkini pauka maloʻo i nā substrate wela i nā wela kiʻekiʻe (ʻoi aku ma mua o 40 degere) ma nā wahi he nui, e like me ka pā o waho ka putty plastering ma lalo o ka lā i ke kauwela, e hoʻolōʻihi pinepine i ka hoʻomaʻamaʻa ʻana i ka sima a me ka paʻakikī. puna pauda maloʻo.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.
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.I kēia manawa, nui ka poʻe kūʻai hewa ʻole e hoʻohui i ka HPMC, a maikaʻi ʻole ka maikaʻi.I ke koho ʻana i kekahi cellulose, pono e hana maikaʻi ke keʻena hana i ka hoʻokolohua e hōʻoia i ka paʻa o ka huahana mortar, a mai kuko i nā mea liʻiliʻi a kumu ʻole i nā poho pono ʻole.
Ka manawa hoʻouna: Mei-04-2023