Hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chofunikira pa zomatira zamakono zama matailosi ndi zophatikizira zamakemikolo. Katundu wake wochita ntchito zambiri amathandizira mbali zonse za zomatira, zomwe zimathandizira kukonza magwiridwe antchito, kusunga madzi, kumamatira komanso kugwira ntchito kwathunthu.
Makampani omanga akupitirizabe kufunafuna njira zatsopano zothetsera ntchito ndi kulimba kwa zomangira. Zina mwazowonjezera zosiyanasiyana zomwe zimagwiritsidwa ntchito popanga mankhwala omanga, hydroxypropyl methylcellulose (HPMC) yakopa chidwi chifukwa cha zabwino zake zingapo zomatira matailosi ndi kuphatikiza kwa mankhwala omanga. HPMC ndi yochokera ku cellulose yokhala ndi zinthu zapadera zomwe zimatha kukhudza momwe zomatira zimagwirira ntchito ndikuwongolera ntchito zonse zomanga. Cholinga cha nkhaniyi ndikuwunika udindo ndi maubwino a HPMC pa zomatira matailosi ndi kuphatikiza kwa mankhwala omanga, kufotokoza momwe amapangira, momwe amagwirira ntchito komanso zabwino zomwe amapereka pantchito yomanga.
1. Chemical kapangidwe ndi katundu wa HPMC:
Hydroxypropyl methylcellulose (HPMC) ndi semi-synthetic polima yosinthidwa ndi cellulose. Amapangidwa pochiza cellulose ndi propylene oxide ndi methyl chloride, kupanga chigawo chokhala ndi hydroxypropyl ndi methyl substituents (-OH ndi -CH3 magulu) omwe amamangiriridwa ku msana wa cellulose. Digiri ya m'malo (DS) yamagulu a hydroxypropyl ndi methyl imatsimikizira zomwe HPMC imaphatikizapo kukhuthala, kusungunuka, komanso kukhazikika kwamafuta.
HPMC ili ndi kusungunuka kwamadzi bwino kwambiri ndipo imapanga njira yowonekera komanso yowoneka bwino ikamwazikana m'madzi. Komabe, kusungunuka kwake kumadalira kutentha, ndi kutentha kwakukulu kumakonda kusungunuka. Katunduyu amapangitsa HPMC kukhala yoyenera kugwiritsidwa ntchito popanga mankhwala omwe amapangidwa ndi madzi. Kuonjezera apo, HPMC imapereka khalidwe la pseudoplastic ku yankho, kutanthauza kuti kukhuthala kwake kumachepa pansi pa kumeta ubweya wa ubweya, motero kumapangitsa kuti ntchito ikhale yosavuta komanso kupititsa patsogolo kusinthika kwa zomatira.
2. Njira yopangira zomatira matailosi a ceramic:
Mu matailosi zomatira formulations, HPMC amatumikira zosiyanasiyana ntchito chifukwa wapadera mankhwala kapangidwe ndi katundu. Imodzi mwa ntchito zake zazikulu ndikuchita ngati thickener, kukonza kusasinthasintha ndi ntchito zomatira. Powonjezera kukhuthala, HPMC imathandiza kupewa zomatira matope kuti zisagwe kapena kugwa, kuwonetsetsa kuti matailosi amalumikizana bwino ndi gawo lapansi.
HPMC imagwiranso ntchito ngati chosungira madzi, kulola zomatira kukhalabe ndi chinyezi chokwanira pakuchiritsa. Katunduyu ndi wofunikira kuti atsimikizire kuti hydration yoyenera ya simenti yomatira mu zomatira, kulimbikitsa zomangira zolimba ndikuchepetsa chiopsezo cha ming'alu ya shrinkage. Kuphatikiza apo, kuthekera kosunga madzi kwa HPMC kumathandizira kukulitsa nthawi yotseguka, kulola nthawi yokwanira yoyika matailosi ndikusintha zomatira zisanakhazikike.
HPMC imapanga filimu yosinthika komanso yomata ikamawumitsa, potero imawongolera zomangira zomatira matailosi. Firimuyi imagwira ntchito ngati zomatira, zomwe zimalimbikitsa mgwirizano pakati pa zomatira, matailosi ndi gawo lapansi. Kukhalapo kwa HPMC kumakulitsa mphamvu ya chigwirizano chonse ndi kulimba kwa kuyika matayala, kuchepetsa kuthekera kwa debonding kapena delamination pakapita nthawi.
3. Zokhudza zosakaniza za mankhwala:
Kuphatikiza pa zomatira matailosi, HPMC imagwiritsidwa ntchito kwambiri pazophatikizira zamankhwala osiyanasiyana, kuphatikiza matope, ma pulasitala ndi ma grouts. Katundu wake wochita ntchito zambiri umapangitsa kukhala chowonjezera chofunikira kwambiri kuti chiwonjezere magwiridwe antchito ndi kulimba kwa zida izi. M'matope, HPMC imagwira ntchito ngati rheology modifier, kulamulira kayendedwe ka kayendedwe kake komanso kusasinthasintha kwa osakaniza. Izi zimatsimikizira kugwiritsa ntchito yunifolomu ndikuwongolera magwiridwe antchito, kumathandizira kuyika komanso kuchepetsa zinyalala zakuthupi.
HPMC imathandizira kukonza zodziyimira pawokha zopangira pansi ndi mbewu za SCR, zomwe zimapangitsa kuti pakhale malo osalala, osalala. Mphamvu yake yokhala ndi madzi imalepheretsa kusakaniza kuuma msanga, kumalimbikitsa kuchiritsa koyenera ndikuchepetsa zofooka zapamtunda monga ming'alu kapena ming'alu. Kuphatikiza apo, HPMC imathandizira kumamatira ndi kumamatira kwa pulasitala ndi ma grouts, zomwe zimapangitsa kuti pakhale zomaliza zamphamvu, zokongola kwambiri.
Kugwiritsiridwa ntchito kwa HPMC pakupanga mankhwala osakaniza kumagwirizana ndi zolinga zokhazikika zamakampani omanga. Pakuwongolera magwiridwe antchito komanso kuchepetsa kugwiritsa ntchito zinthu, HPMC imathandizira kuti zinthu ziziyenda bwino komanso kuchepetsa zinyalala. Kuphatikiza apo, ntchito yake pokulitsa kulimba kwa zida zomangira zimathandiza kukulitsa moyo wa nyumbayo, potero kuchepetsa kufunika kokonzanso kapena kusinthidwa pafupipafupi.
Hydroxypropyl methylcellulose (HPMC) imagwira ntchito yofunika kwambiri pa zomatira zamakono za matailosi ndi zophatikizira zamakina omanga, zomwe zimapereka zabwino zambiri zomwe zimathandizira kukonza magwiridwe antchito, kugwira ntchito komanso kulimba. Kapangidwe kake kapadera ka mankhwala ndi zinthu zake zimamuthandiza kuti azitha kuchita zinthu ngati thickener, kusunga madzi ndi zomata pakupanga zomatira. Kuphatikiza apo, HPMC imapangitsanso rheological katundu wa zomangira mankhwala admixtures kuti atsogolere ntchito ndi kuonetsetsa kufanana kwa mankhwala yomalizidwa.
Kugwiritsiridwa ntchito kofala kwa HPMC pantchito yomanga kumawunikira kufunikira kwake monga chowonjezera chosunthika chomwe chimapangitsa kuti zida zomangira zikhale zabwino komanso zokhazikika. Pamene machitidwe omanga akupitilirabe, kufunikira kwa njira zopangira njira zogwirira ntchito komanso kulimba kumayendetsa kafukufuku wopitilira ndi kupanga mapangidwe opangidwa ndi HPMC. Pogwiritsa ntchito kuthekera kwa HPMC, makampani omanga amatha kuzindikira kupita patsogolo kwazinthu zakuthupi ndikuthandizira kukulitsa malo omangidwa okhazikika komanso okhazikika.
Nthawi yotumiza: Feb-26-2024