Hydroxypropyl methylcellulose (HPMC) ndi ether yosungunuka m'madzi yomwe siionic cellulose yomwe imagwiritsidwa ntchito kwambiri popanga zida zomangira, mankhwala, chakudya, zinthu zosamalira anthu komanso zokutira. Mu zokutira zamafakitale ndi utoto, HPMC yakhala chowonjezera chofunikira chifukwa cha mawonekedwe ake apadera akuthupi ndi mankhwala. Ntchito yake yayikulu ndikugwira ntchito ngati thickener, stabilizer, film-forming agent ndi rheology control agent kuti apititse patsogolo kugwira ntchito, kukhazikika kosungirako komanso kutsekemera kwabwino kwa zokutira ndi utoto.
1. Makhalidwe oyambira a HPMC
HPMC ndi pawiri wopezedwa ndi mankhwala kusintha cellulose zachilengedwe. Ili ndi zotsatirazi zofunikira komanso zamankhwala, zomwe zimapangitsa kuti zizigwiritsidwa ntchito kwambiri popaka utoto ndi utoto wa mafakitale:
Kusungunuka kwamadzi: HPMC imakhala ndi kusungunuka kwabwino m'madzi ozizira, ndikupanga njira yowonekera bwino yomwe imathandiza kuwongolera kukhuthala kwa utoto.
Kutentha kwa kutentha: Pa kutentha kwina, HPMC imapanga gel osakaniza ndikubwerera ku malo abwino pambuyo pozizira. Makhalidwewa amalola kuti apereke ntchito yabwino yokutira pansi pamikhalidwe yomanga.
Zabwino kupanga filimu: HPMC imatha kupanga filimu yosalekeza utoto ukauma, kuwongolera kumamatira komanso kulimba kwa zokutira.
Kukhazikika: Imakhala ndi kukana kwakukulu kwa ma acid, maziko ndi ma electrolyte, kuonetsetsa kukhazikika kwa zokutira pansi pazikhalidwe zosiyanasiyana zosungira ndikugwiritsa ntchito.
2. Ntchito zazikulu za HPMC mu zokutira mafakitale ndi utoto
2.1 Wowonjezera
Mu zokutira zamafakitale, kukhuthala kwa HPMC ndikofunikira kwambiri. Yankho lake lili ndi mamasukidwe apamwamba kwambiri komanso kumeta ubweya wabwino, ndiye kuti, pakuyambitsa kapena kupenta, kukhuthala kudzachepa kwakanthawi, potero kumathandizira kupanga utoto, ndipo mamasukidwe ake amachira msanga pambuyo poyimitsa ntchito kuti aletse utoto. kuchokera kugwa. Katunduyu amatsimikizira kugwiritsa ntchito zokutira ndikuchepetsa kuchepa.
2.2 Kulamulira kwa Rheology
HPMC imakhudza kwambiri rheology ya zokutira. Imasunga mamasukidwe oyenera a zokutira panthawi yosungira ndikuletsa zokutira kuti zisawonongeke kapena kukhazikika. Pakugwiritsa ntchito, HPMC imapereka mawonekedwe oyenerera kuti athandizire utoto kugawira mofanana pamwamba pa ntchito ndikupanga zokutira zosalala. Kuonjezera apo, kumeta ubweya wa ubweya kumatha kuchepetsa zizindikiro za burashi kapena zolembera zomwe zimapangidwa panthawi yogwiritsira ntchito ndikuwongolera maonekedwe a filimu yomaliza yophimba.
2.3 Wopanga mafilimu
Mafilimu opanga mafilimu a HPMC amathandizira kukonza zomatira ndi mphamvu za filimu zokutira. Pa kuyanika, filimu yopangidwa ndi HPMC imakhala yolimba komanso yosalala, yomwe imatha kupititsa patsogolo kukana kwa ming'alu ndi kuvala kukana kwa zokutira, makamaka pamafakitale omwe amafunidwa kwambiri ndi mafakitale, monga zombo, magalimoto, ndi zina zambiri, HPMC The kupanga mafilimu amatha kupititsa patsogolo kulimba kwa zokutira.
2.4 Stabilizer
Monga stabilizer, HPMC ingalepheretse mpweya wa inki, fillers ndi particles zina olimba mu ❖ kuyanika formulations, potero kuwongolera kusunga bata zokutira. Izi ndizofunikira makamaka pazovala zokhala ndi madzi. HPMC imatha kuletsa delamination kapena kuphatikizika kwa zokutira panthawi yosungira ndikuwonetsetsa kusasinthika kwazinthu pakanthawi yayitali.
3. Kugwiritsa ntchito HPMC mu zokutira zosiyanasiyana
3.1 Zopaka zamadzi
Zovala zokhala ndi madzi zakhala zikuyang'aniridwa kwambiri m'zaka zaposachedwa chifukwa chokonda zachilengedwe komanso mpweya wochepa wa volatile organic compound (VOC). HPMC chimagwiritsidwa ntchito zokutira madzi zochokera. Monga thickener ndi stabilizer, HPMC akhoza bwino kusintha kusunga bata ndi workability wa zokutira madzi. Amapereka kuwongolera koyenda bwino m'malo otentha kapena otsika kwambiri, kupangitsa utoto kukhala wosalala ukapopera, kupukutidwa kapena kukulungidwa.
3.2 Utoto wa latex
Utoto wa latex ndi chimodzi mwazovala zogwiritsidwa ntchito kwambiri masiku ano. HPMC imagwiritsidwa ntchito ngati rheology control agent ndi thickener mu utoto wa latex, yomwe imatha kusintha kukhuthala kwa utoto wa latex, kukulitsa kufalikira kwake, ndikuletsa filimu ya utoto kuti isagwe. Kuphatikiza apo, HPMC imakhala ndi mphamvu zowongolera bwino pakubalalika kwa utoto wa latex ndikuletsa zigawo za utoto kuti zisakhazikike kapena kukhazikika panthawi yosungira.
3.3 Utoto wopangidwa ndi mafuta
Ngakhale kugwiritsa ntchito zokutira zokhala ndi mafuta kwatsika masiku ano chifukwa chazovuta zoteteza zachilengedwe, zimagwiritsidwabe ntchito kwambiri m'mafakitale ena, monga zokutira zoteteza zitsulo. HPMC imagwira ntchito ngati woyimitsa komanso wowongolera ma rheology mu zokutira zokhala ndi mafuta kuti aletse kukhazikika kwa pigment ndikuthandizira kuti zokutira zizikhala bwino komanso kumamatira pakugwiritsa ntchito.
4. Momwe mungagwiritsire ntchito ndi mlingo wa HPMC
Kuchuluka kwa HPMC komwe kumagwiritsidwa ntchito popaka nthawi zambiri kumatsimikiziridwa ndi mtundu wa zokutira ndi zosowa zenizeni za ntchito. Nthawi zambiri, kuchuluka kwa HPMC nthawi zambiri kumayendetsedwa pakati pa 0.1% ndi 0.5% ya kuchuluka kwa zokutira. Njira yowonjezera nthawi zambiri imakhala yowonjezera ufa wowuma mwachindunji kapena njira yokonzedweratu ndikuwonjezeredwa. The solubility ndi mamasukidwe akayendedwe kusintha zotsatira za HPMC amakhudzidwa ndi kutentha, khalidwe madzi ndi zolimbikitsa mikhalidwe. Choncho, njira yogwiritsira ntchito iyenera kusinthidwa malinga ndi zochitika zenizeni.
Hydroxypropyl methylcellulose (HPMC) amagwiritsidwa ntchito ngati thickener, rheology control agent, film-forming agent ndi stabilizer mu zokutira mafakitale ndi utoto, kwambiri kupititsa patsogolo ntchito yomanga, kusunga bata ndi chomaliza filimu ❖ kuyanika kwa zokutira. khalidwe. Ndi kulimbikitsa zokutira zoteteza zachilengedwe komanso kufunikira kwa msika wa zokutira zowoneka bwino kwambiri, HPMC ipitiliza kuchita gawo lofunikira pakupangira zokutira zamtsogolo zamakampani. Kupyolera mukugwiritsa ntchito moyenera kwa HPMC, mawonekedwe akuthupi ndi mankhwala a zokutira amatha kuwongolera bwino, ndipo kulimba ndi kukongoletsa kwa zokutira kumatha kupitilizidwa.
Nthawi yotumiza: Sep-13-2024