Hydroxypropyl Methylcellulose (HPMC) ndi ether yopanda ionic cellulose yomwe imagwiritsidwa ntchito kwambiri pomanga, makamaka mumatope owuma, zomatira ndi zokutira. Kukhuthala kwa HPMC ndi chimodzi mwazizindikiro zake zazikulu zogwirira ntchito zomanga ndipo zimakhudza kwambiri magwiridwe antchito, kusungidwa kwamadzi komanso makina azinthuzo.
Ubale pakati pa viscosity ya hydroxypropyl methylcellulose ndi mawonekedwe a formula
Kugwira ntchito
Kukhuthala kwa HPMC kumagwira ntchito yofunika kwambiri pakugwirira ntchito kwa zida zomangira. Mkulu mamasukidwe akayendedwe HPMC akhoza kwambiri kusintha kugwirizana ndi rheological katundu wa zinthu, kulola kuti bwino kutsatira gawo lapansi ndi kuchepetsa sagging pomanga. Mwachitsanzo, mu zomatira za matailosi a ceramic, kugwiritsa ntchito HPMC yokhala ndi mamasukidwe apamwamba kungapangitse kuti guluu likhale losavuta kupanga zokutira yunifolomu pakati pa matailosi a ceramic ndi gawo lapansi, potero kumapangitsa kuti ntchito yomanga ikhale yogwira mtima komanso yolumikizana.
Komabe, kukhuthala kwamphamvu kwambiri kungapangitse kuti ntchito ikhale yovuta kwambiri, popeza zida zowoneka bwino zimatha kukhala zovuta kuzigwedeza ndikufalikira. Chifukwa chake, ndikofunikira kupeza mgwirizano pakati pa mamasukidwe akayendedwe ndi magwiridwe antchito kuti muwonetsetse kuti zinthuzo zili ndi ntchito yabwino komanso zimatha kukwaniritsa zosowa zamainjiniya.
Kusunga madzi
Makhalidwe osungira madzi a HPMC ndi ofunikira pakuumitsa kwa zida zomangira. High mamasukidwe akayendedwe HPMC ali wamphamvu madzi posungira mphamvu ndipo amatha kusunga chinyezi zinthu kwa nthawi yaitali pambuyo kumanga. Izi ndizofunikira kwambiri pazida zopangira simenti, chifukwa chinyezi chokwanira chimatha kulimbikitsa kuyatsa kwa simenti ndikuwonjezera mphamvu ndi kulimba kwa zinthu zolimba.
Mu zipangizo zochokera gypsum, mkulu mamasukidwe akayendedwe HPMC amathandizanso kupewa mochulukira chinyezi kutaya pa ntchito yomanga, potero kupewa ming'alu ndi shrinkage mavuto. Nthawi zambiri, HPMC yokhala ndi mamasukidwe apamwamba ili ndi maubwino odziwikiratu pakuwongolera kusungidwa kwamadzi ndipo ndiyoyenera kugwiritsa ntchito zomwe zimafunikira kuwongolera kwachinyontho.
Anti-sag ndi anti-slip properties
Muzinthu zokutira pakhoma ndi zomatira matailosi, kukhuthala kwa HPMC kumathandizanso kwambiri pakukana kwa sag komanso kukana kuterera. Mkulu mamasukidwe akayendedwe HPMC akhoza mogwira kuonjezera thixotropy wa zinthu, kuchititsa kuonetsa apamwamba mamasukidwe akayendedwe mu malo amodzi boma, motero kuchepetsa otaya zinthu pa ofukula pamalo. Katunduyu ndi wofunikira pakusunga bata kwa zokutira kapena matailosi pamalo oyima, kuthandizira kukonza bwino komanso luso la zomangamanga.
Air encapsulation ndi mphamvu ya mgwirizano
The mamasukidwe akayendedwe a HPMC zimakhudzanso kuchuluka kwa mpweya entrapment mu zinthu ndi mtheradi zake chomangira mphamvu. High-viscosity HPMC imatha kukulitsa zomwe zili mumlengalenga, potero zimathandizira kukhazikika kwazinthuzo komanso katundu wotchinjiriza wamafuta. Komabe, mpweya wochuluka kwambiri ukhoza kuchepetsa kachulukidwe kazinthuzo, motero zimakhudza mphamvu yake yomangira. Choncho, posankha HPMC, m'pofunika kuganizira mozama mmene mamasukidwe akayendedwe ake pa katundu structural wa zinthu kuonetsetsa kuti nkhaniyo ali bwino processing ntchito ndipo akhoza kukwaniritsa zomaliza makina ntchito zofunika.
Kukhathamiritsa ndi kusankha mu ntchito zothandiza
Pakugwiritsa ntchito, opanga zida zomangira nthawi zambiri amakulitsa kuchuluka kwa kugwiritsidwa ntchito ndi kukhuthala kwa HPMC kudzera muzoyeserera komanso zokumana nazo kuti akwaniritse zosowa za ntchito zina. Makamaka, zochitika zosiyanasiyana zogwiritsira ntchito zitha kukhala ndi zofunikira zosiyanasiyana za kukhuthala kwa HPMC. Mwachitsanzo, mu zomatira matailosi, high-viscosity HPMC nthawi zambiri amagwiritsidwa ntchito kukulitsa kukana kuterera, pomwe mumatope opaka pulasitala, HPMC imatha kusankhidwa kuti iganizire kugwirira ntchito komanso kusunga madzi.
Magawo monga kugawa kulemera kwa mamolekyulu, digiri ya kusintha (DS) ndi digiri ya molar of substitution (MS) ya HPMC idzakhudzanso kukhuthala kwake ndi magwiridwe ake. Choncho, posankha HPMC, osati mamasukidwe akayendedwe ayenera kuganiziridwa, koma katundu wake ena mankhwala ayeneranso kuganiziridwa mokwanira kuonetsetsa ntchito mulingo woyenera kwambiri mu zomangira.
Kukhuthala kwa hydroxypropyl methylcellulose kumakhudza kwambiri momwe amagwirira ntchito pazomangira. Posankha mwanzeru ndi kukhathamiritsa kukhuthala kwa HPMC, kutheka kwa zinthuzo, kusungika kwa madzi, kukana kwa sag komanso mphamvu ya kutsekeka kwa mpweya kumatha kupitilizidwa, potero kupititsa patsogolo magwiridwe antchito ndikumanga bwino kwa zida zomangira. Pakugwiritsa ntchito, HPMC yokhala ndi kukhuthala koyenera imayenera kusankhidwa molingana ndi zofunikira zakuthupi komanso momwe zimakhalira kuti zikwaniritse ntchito yomanga komanso yolimba. Izi sizimangofunika kumvetsetsa mozama za mankhwala ndi thupi la HPMC, komanso zimafuna kuphatikizika kwa chidziwitso ndi deta yoyesera muzochitika zenizeni kuti zitsimikizire kukhathamiritsa kwazinthu zonse.
Nthawi yotumiza: Jul-10-2024