IHydroxypropylmethylcellulose (HPMC) iyipolymer esetshenziswa kakhulu enezinhlobonhlobo zokusetshenziswa emikhakheni eyahlukene. Isetshenziswa kakhulu kwezokwelapha, ukudla, izimonyo, ukwakhiwa kanye nezinye izimboni. Ukuhlanzeka kwe-HPMC kuyisici esibalulekile esithinta ukusebenza nokusebenza kwayo. Kulesi sihloko, sixoxa ngezinto ezithinta ukuhlanzeka kwe-HPMC.
1. Izinto zokusetshenziswa
Ukuhlanzeka kwe-HPMC kuncike kakhulu ekuhlanzekeni kwezinto ezingavuthiwe ezisetshenziswa ekukhiqizeni kwayo. Izinto zokusetshenziswa ezisetshenziswa ekukhiqizweni kwe-HPMC zifaka i-cellulose, i-methyl chloride, i-propylene oxide namanzi. Uma kukhona ukungcola kulezi zinto zokusetshenziswa, zizothwalwa ku-HPMC ngesikhathi senqubo yokukhiqiza, okuholela ekulahlekeni kokuhlanzeka.
2. Inqubo yokukhiqiza
Inqubo yokukhiqiza ye-HPMC ibandakanya izinyathelo ezimbalwa, okuhlanganisa ukusabela kwe-cellulose nge-methyl chloride ne-propylene oxide, ukuhlanzwa nokomisa. Noma yikuphi ukuchezuka ezimeni ezifanele zenqubo kungaholela ekungcoleni komkhiqizo wokugcina, kunciphise ubumsulwa bawo.
3. Izincibilikisi kanye nama-catalysts
Ngesikhathi sokukhiqizwa kwe-HPMC, ama-solvents nama-catalysts asetshenziselwa ukwenza lula ukusabela phakathi kwe-cellulose, i-methyl chloride ne-propylene oxide. Uma lezi zincibilikisi kanye nama-catalysts kungezona zokuhlanzeka okuphezulu, zingase zingcolise futhi zinciphise ukuhlanzeka komkhiqizo wokugcina.
4. Isitoreji kanye nezinto zokuhamba
Isitoreji nezokuthutha nakho kunquma ubumsulwa be-HPMC. I-HPMC kufanele igcinwe endaweni epholile neyomile ukuze kuvinjelwe ukumuncwa komswakama kanye nokuwohloka. Ukwengeza ama-stabilizer afanelekile kanye nama-antioxidants ngesikhathi sokugcina nokuthutha kungavimbela ukuwohloka kwe-HPMC nokugcina ubumsulwa bayo.
5. Ukulawulwa kwekhwalithi
Okokugcina, ukulawulwa kwekhwalithi kuyisici esibalulekile ekuqinisekiseni ukuhlanzeka kwe-HPMC. Abakhiqizi be-HPMC kufanele basebenzise izinyathelo eziqinile zokulawula ikhwalithi ukuze baqaphe ubumsulwa bemikhiqizo yabo. Lokhu kubandakanya ukuhlola ukuhlanzeka kwezinto ezingavuthiwe, ukuhlola izinga elijwayelekile ngesikhathi sokukhiqiza, kanye nokuhlola ubumsulwa bomkhiqizo wokugcina.
Kafushane, ubumsulwa be-HPMC buthintwa yizici eziningi, okuhlanganisa ukuhlanzeka kwempahla eluhlaza, inqubo yokukhiqiza, izincibilikisi nama-catalysts asetshenziswayo, ukugcinwa nezokuthutha, nokulawulwa kwekhwalithi. Ukuqinisekisa ikhwalithi ephezulu nokuhlanzeka kwe-HPMC, ukusetshenziswa kwezinto ezingavuthiwe zekhwalithi ephezulu, ukunamathela ngokuqinile ezimweni ezifanelekile zokukhiqiza, ukusetshenziswa kwezinyibilikisi ezihlanzekile nezisusa izinto, ukugcinwa okufanele kanye nokuthuthwa kwemikhiqizo, kanye nezinyathelo eziqinile zokulawula ikhwalithi kufanele zisetshenziswe. . Ngokwenza kanjalo, abakhiqizi bangakhiqiza ama-HPMC ekhwalithi ephezulu ahlangabezana nezidingo zamakhasimende ezimbonini ezahlukahlukene.
Isikhathi sokuthumela: Jul-18-2023