Hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chomwe chimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana kuphatikiza zomangamanga chifukwa cha ntchito zake zambiri. Pankhani yopanga putty, HPMC imagwira ntchito yofunika kwambiri pakuwongolera zinthu monga zomangamanga, zomatira, kusunga madzi komanso kukana ming'alu.
Putty ndi chinthu chosunthika chomwe chimagwiritsidwa ntchito kwambiri pomanga kudzaza ming'alu, malo osanjikiza ndikupereka malo osalala pamakoma ndi denga. Kuchita kwa putty ndikofunikira kuti mukwaniritse zomwe mukufuna pantchito yomanga, chifukwa chake zowonjezera zimagwiritsidwa ntchito kukulitsa katundu wake. Hydroxypropyl methylcellulose (HPMC) yakhala chowonjezera chofunikira pamapangidwe a putty chifukwa cha kuthekera kwake kusintha rheology, kukonza magwiridwe antchito komanso kukulitsa kulimba.
1. Mwachidule za Hydroxypropyl Methylcellulose (HPMC):
HPMC ndi yochokera ku cellulose, yopangidwa ndikusintha magulu a hydroxyl a cellulose ndi magulu a methoxy ndi hydroxypropyl. Kusintha kwamankhwala kumeneku kumapatsa HPMC katundu wapadera, ndikupangitsa kuti ikhale yosungunuka kwambiri m'madzi ndikutha kupanga mayankho okhazikika a colloidal. Popanga putty, HPMC imagwira ntchito ngati chowonjezera, chomangira, komanso chosungira madzi, zomwe zimakhudza kutsitsimuka komanso kuuma kwa putty.
2.Zolemba za Chinsinsi:
Kuphatikizira HPMC m'mapangidwe a putty kumafuna kuganizira mozama zinthu monga kugawa kukula kwa tinthu, kukhuthala kwa ma viscosity, nthawi yoyika, komanso kugwirizana ndi zowonjezera zina. Kusankha giredi yoyenera ya HPMC ndi kuyika kwake ndikofunikira kuti mukwaniritse bwino pakati pa processability ndi makina. Kuphatikiza apo, kuyanjana pakati pa HPMC ndi zosakaniza zina monga zodzaza, ma pigment, ndi dispersants ziyenera kuwunikiridwa kuti zitsimikizire kuti zimagwirizana ndikuwongolera magwiridwe antchito.
3. Zokhudza processability:
Chimodzi mwazabwino zazikulu za HPMC pamapangidwe a putty ndikutha kuwongolera magwiridwe antchito posintha mawonekedwe a rheological. HPMC imagwira ntchito ngati thickener, kuonjezera mamasukidwe akayendedwe a putty phala ndi kuchepetsa sagging kapena kudontha pa ntchito. Mawonekedwe a pseudoplastic a yankho la HPMC amathandiziranso kufalikira kosavuta komanso kutha kosalala kwa putty pamwamba, motero kumapangitsa kuti magwiridwe antchito azitha kugwiritsidwa ntchito pamitundu yosiyanasiyana yomanga.
4. Mphamvu pamakina:
Kuwonjezera kwa HPMC kungakhudze kwambiri mawotchi a putty, kuphatikizapo mphamvu zomatira, mphamvu zamakokedwe ndi mphamvu zowonongeka. HPMC imapanga filimu yopyapyala pamwamba pa tinthu tating'onoting'ono, yomwe imakhala ngati zomatira ndikuwongolera kulumikizana kwapakati pakati pa tinthu tating'onoting'ono. Izi zimawonjezera mgwirizano mkati mwa putty matrix ndikuwonjezera kukana kusweka ndi kusinthika. Komanso, HPMC kumathandiza kupanga wandiweyani microstructure, potero kusintha makina katundu monga compressive mphamvu ndi kuvala kukana.
5. Limbikitsani kulimba:
Kukhazikika ndichinthu chofunikira kwambiri pakuchita kwa putty, makamaka pazogwiritsa ntchito kunja komwe kukhudzana ndi zinthu zachilengedwe monga chinyezi, ma radiation a UV ndi kusinthasintha kwa kutentha kumatha kuwononga zinthu pakapita nthawi. HPMC imagwira ntchito yofunika kwambiri pakukulitsa kulimba kwa ma putties powongolera kukana kwa madzi, kukana nyengo komanso kukana kukula kwa tizilombo. Chikhalidwe cha hydrophilic cha HPMC chimalola kuti chisunge chinyezi mu putty matrix, kuteteza kutaya madzi m'thupi komanso kuchepetsa chiopsezo cha ming'alu ya shrinkage. Kuphatikiza apo, HPMC imapanga filimu yoteteza pamwamba pa putty, yomwe imalepheretsa chinyezi kulowa ndikuukira kwamankhwala, potero kumakulitsa moyo wautumiki wa putty.
6. Zoganizira zachilengedwe:
M'zaka zaposachedwa, pakhala chidwi chofuna kupanga zida zomangira zosawononga chilengedwe zomwe zimachepetsa kuwononga chilengedwe. HPMC imapereka maubwino angapo pankhaniyi, chifukwa imachokera kuzinthu zongowonjezwdwa ndipo imatha kuwonongeka ngati zinthu zili bwino. Kupitilira apo, kugwiritsa ntchito HPMC pamapangidwe a putty kumawonjezera kugwiritsa ntchito bwino zinthu ndikuchepetsa kuwononga zinyalala, motero kumathandizira kusunga mphamvu ndi zinthu. Komabe, mphamvu yonse ya moyo wa HPMC yokhala ndi putty, kuphatikiza zinthu monga njira zopangira, mayendedwe ndi kutaya, ziyenera kuganiziridwa kuti ziwunikenso kukhazikika kwake.
Hydroxypropyl methylcellulose (HPMC) ndi chowonjezera chamitundumitundu chomwe chingakhudze kwambiri magwiridwe antchito a putty pakumanga. Kuthekera kwa HPMC kusintha mawonekedwe a rheological, kukonza magwiridwe antchito, kupititsa patsogolo makina komanso kukhazikika kumathandizira kupanga mapangidwe apamwamba kwambiri a putty oyenera zosiyanasiyana. Komabe, kukwaniritsa ntchito yabwino kumafunika kupangidwa mosamala, poganizira zinthu monga kusankha magiredi, kugwirizana ndi zinthu zachilengedwe. Kafukufuku wowonjezereka akufunika kuti afufuze ntchito zatsopano za HPMC muzolemba za putty ndikuthana ndi zovuta zomwe zikubwera pomanga zokhazikika.
Nthawi yotumiza: Feb-22-2024