1 Kodi ntchito zazikulu za ether ya cellulose HPMC ndi ziti?
HPMC imagwiritsidwa ntchito kwambiri mu matope omangira, utoto wochokera m'madzi, utomoni wopangidwa, ziwiya zadothi, mankhwala, chakudya, nsalu, zodzoladzola, fodya, ndi mafakitale ena. Imagawidwa m'magulu omangira, kalasi ya chakudya, kalasi ya mankhwala, kalasi ya PVC ya mafakitale ndi kalasi ya mankhwala ya tsiku ndi tsiku.
2 Kodi magulu a cellulose ndi ati?
Maselo ofala kwambiri ndi MC, HPMC, MHEC, CMC, HEC, EC
Pakati pawo, HEC ndi CMC zimagwiritsidwa ntchito kwambiri popanga zokutira zochokera m'madzi;
CMC ingagwiritsidwenso ntchito mu zoumbaumba, minda yamafuta, chakudya ndi minda ina;
EC imagwiritsidwa ntchito kwambiri mu zamankhwala, phala la siliva lamagetsi ndi madera ena;
HPMC imagawidwa m'magawo osiyanasiyana ndipo imagwiritsidwa ntchito mu matope, mankhwala, chakudya, makampani a PVC, mankhwala a tsiku ndi tsiku ndi mafakitale ena.
3 Kodi kusiyana pakati pa HPMC ndi MHEC ndi kotani pakugwiritsa ntchito?
Kapangidwe ka mitundu iwiri ya cellulose ndi kofanana, koma kukhazikika kwa kutentha kwa MHEC kumakhala bwino, makamaka nthawi yachilimwe pamene kutentha kwa khoma kuli kwakukulu, ndipo magwiridwe antchito a MHEC osungira madzi ndi abwino kuposa a HPMC pamene kutentha kuli kwakukulu.
4 Kodi mungaweruze bwanji mtundu wa HPMC?
1) Ngakhale kuti kuyera sikungathe kudziwa ngati HPMC ndi yosavuta kugwiritsa ntchito, ndipo ngati zinthu zoyeretsera ziwonjezedwa popanga, khalidwe lake lidzakhudzidwa, koma zinthu zambiri zabwino zimakhala ndi kuyera kwabwino, komwe kungawonedwe mozama kuchokera ku mawonekedwe ake.
2) Kutumiza kuwala: Mukamaliza kusungunula HPMC m'madzi kuti ipange colloid yowonekera bwino, yang'anani momwe kuwala kwake kumatumizira. Kutumiza kuwala kuli bwino, zinthu zosasungunuka zimakhala zochepa, ndipo khalidwe lake limakhala labwino.
Ngati mukufuna kuweruza molondola mtundu wa cellulose, njira yodalirika kwambiri ndikugwiritsa ntchito zida zaukadaulo mu labotale yaukadaulo poyesa. Zizindikiro zazikulu zoyesera zimaphatikizapo kukhuthala, kuchuluka kwa madzi omwe amasungidwa, komanso kuchuluka kwa phulusa.
5 Njira yodziwira kukhuthala kwa cellulose?
Viscometer yodziwika bwino pamsika wa cellulose wamkati ndi NDJ, koma pamsika wapadziko lonse lapansi, opanga osiyanasiyana nthawi zambiri amagwiritsa ntchito njira zosiyanasiyana zoyesera kukhuthala. Zodziwika bwino ndi Brookfeild RV, Hoppler, ndipo palinso njira zosiyanasiyana zodziwira, zomwe zimagawidwa mu yankho la 1% ndi yankho la 2%. Ma viscometer osiyanasiyana ndi njira zosiyanasiyana zodziwira nthawi zambiri zimapangitsa kuti zotsatira za kukhuthala zikhale zosiyana kapena zambiri.
6 Kodi pali kusiyana kotani pakati pa mtundu wa HPMC instant ndi mtundu wa hot melt?
Zogulitsa za HPMC zomwe zimagwira ntchito nthawi yomweyo zimaimira zinthu zomwe zimafalikira mwachangu m'madzi ozizira, koma ziyenera kudziwika kuti kufalikira sikutanthauza kusungunuka. Zogulitsa zomwe zimagwira ntchito nthawi yomweyo zimayikidwa ndi glyoxal pamwamba ndipo zimafalikira m'madzi ozizira, koma sizimayamba kusungunuka nthawi yomweyo. , kotero kukhuthala sikupangidwa nthawi yomweyo pambuyo pofalikira. Kuchuluka kwa mankhwala a glyoxal pamwamba, kufalikira kumathamanga, koma kukhuthala kumachepa, kuchuluka kwa glyoxal kumachepa, ndipo mosemphanitsa.
7 cellulose yophatikizika ndi cellulose yosinthidwa
Tsopano pali ma cellulose ambiri osinthidwa ndi ma cellulose ophatikizika pamsika, ndiye kodi kusintha ndi kuphatikiza ndi chiyani?
Mtundu uwu wa cellulose nthawi zambiri umakhala ndi zinthu zomwe cellulose yoyambirira ilibe kapena umawonjezera zina mwa zinthu zake, monga: woletsa kutsetsereka, nthawi yotseguka yowonjezera, malo okulirapo okonzera kuti akonze zomangamanga, ndi zina zotero. Komabe, ziyenera kudziwika kuti makampani ambiri amagwiritsanso ntchito cellulose yotsika mtengo yomwe imasokoneza kuti achepetse ndalama imatchedwa compound cellulose kapena modified cellulose. Monga ogula, yesani kusiyanitsa ndipo musanyengedwe. Ndi bwino kusankha zinthu zodalirika kuchokera ku makampani akuluakulu ndi mafakitale akuluakulu.
Nthawi yotumizira: Disembala-23-2022