Hydroxypropyl methylcellulose imakhala yosasungunuka mu ethanol ndi acetone. Njira yamadzimadzi imakhala yokhazikika kutentha kwa chipinda ndipo imatha kutentha kwambiri. Ambiri mwa hydroxypropyl methylcellulose pamsika tsopano ndi amadzi ozizira (madzi otentha m'chipinda, madzi apampopi) nthawi yomweyo. Madzi ozizira pompopompo HPMC idzakhala yabwino komanso yotetezeka kugwiritsa ntchito. HPMC iyenera kuwonjezeredwa mwachindunji ku madzi ozizira patatha mphindi khumi mpaka makumi asanu ndi anayi kuti ikhwime pang'onopang'ono. Ngati ndi chitsanzo chapadera, chiyenera kugwedezeka ndi madzi otentha kuti chibalalike, kenako ndikutsanulira m'madzi ozizira kuti chisungunuke mutatha kuzirala.
Pamene mankhwala HPMC mwachindunji anawonjezera madzi, iwo coagulate ndiyeno kupasuka, koma kuvunda ndi pang'onopang'ono ndi zovuta. Njira zitatu zotsatirazi zoyankhira zimalimbikitsidwa, ndipo ogwiritsa ntchito amatha kusankha njira yabwino kwambiri malinga ndi momwe amagwiritsidwira ntchito (makamaka pamadzi ozizira HPMC pompopompo).
Kutha njira ndi zodzitetezera za HPMC
1. Njira yamadzi ozizira: Pamene ikufunika kuwonjezeredwa ku madzi abwino otentha, ndi bwino kugwiritsa ntchito mtundu wa madzi ozizira. Pambuyo powonjezera mamasukidwe akayendedwe, kusinthasintha kumawonjezeka pang'onopang'ono kuchofunikira.
2. Njira yophatikizira ufa: HPMC ufa ndi kuchuluka komweko kapena zigawo zina za powdery zimabalalika kwathunthu ndi kusakaniza kouma, ndipo mutatha kuwonjezera madzi kuti asungunuke, HPMC ikhoza kusungunuka panthawiyi ndipo sichidzaphatikizananso. M'malo mwake, ziribe kanthu mtundu wa hydroxypropyl methylcellulose. Ikhoza kuwuma kusakanikirana mwachindunji muzinthu zina.
3. Organic zosungunulira kunyowetsa njira: HPMC pre-omwazikana kapena yonyowetsedwa ndi organic solvents, monga Mowa, ethylene glycol kapena mafuta, ndiyeno kusungunuka m'madzi, ndipo HPMC akhoza kusungunuka bwino.
Panthawi ya kusungunuka, ngati pali agglomeration, idzakulungidwa. Izi ndi zotsatira za kugwedezeka kosagwirizana, kotero ndikofunikira kufulumizitsa liwiro loyambitsa. Ngati pali thovu mu kuvunda, ndi chifukwa cha mpweya chifukwa choyambitsa mkangano, ndipo yankho amaloledwa kuima kwa 2- 12 maola (nthawi yeniyeni zimadalira kugwirizana kwa yankho) kapena vacuuming, pressurization ndi njira zina. kuchotsa, kuwonjezera kuchuluka koyenera kwa defoamer kungathenso kuthetsa vutoli. Kuwonjezera kuchuluka koyenera kwa defoamer kungathenso kuthetsa vutoli.
Popeza hydroxypropyl methylcellulose amagwiritsidwa ntchito m'mafakitale osiyanasiyana, ndizofunikira kwambiri kudziwa njira yosungunuka ya hydroxypropyl methylcellulose kuti igwiritsidwe ntchito moyenera. Kuonjezera apo, ogwiritsa ntchito amakumbutsidwa kuti azisamalira chitetezo cha dzuwa, chitetezo cha mvula ndi chitetezo cha chinyezi pakugwiritsa ntchito, kupewa kuwala kwachindunji, ndikusunga pamalo osindikizidwa komanso owuma. Pewani kukhudzana ndi magwero oyatsira ndikupewa kupanga fumbi lambiri m'malo otsekedwa kuti mupewe ngozi zophulika.
Nthawi yotumiza: Jun-20-2023