IHydroxypropyl Methyl Cellulose HPMC
IHydroxypropyl methylcellulose (HPMC), i-non-ionic cellulose ether, itholakala ku-cellulose yemvelo ngochungechunge oluqinile lwezinqubo zamakhemikhali. Le mpushana emhlophe ibonakala ngokungabi naphunga kwayo futhi ayinambitheki, iyenza ingabi yingozi futhi iphephe ukusetshenziswa okuhlukahlukene. Esinye sezici zayo eziphawulekayo yikhono layo lokuncibilika emanzini abandayo, okuholela ekuxazululeni okubonakalayo kwe-viscous. I-HPMC inohlu olubanzi lwezakhiwo zokusebenza, okuhlanganisa ukujiya, ukunamathela, ukuhlakazwa, ukuhlanganisa, kanye namakhono okwenza ifilimu. Ukwengeza, iphumelela kakhulu ekugcineni umswakama, i-gelation, kanye nomsebenzi ongaphezulu, okuwenza ube yinhlanganisela eguquguqukayo kuzo zonke izimboni eziningi, njengezokwelapha, ukukhiqiza ukudla, ukwakhiwa, nezimonyo.
Emkhakheni wezokwakha, i-HPMC ithola inqwaba yezicelo ezibalulekile zokuthuthukisa ikhwalithi nokusebenza kahle kwezinto zokwakha. Isibonelo, uma ihlanganiswa kudaka lukasimende, i-HPMC ithuthukisa kakhulu ukuhlakazeka kwento, okuholela ekuthuthukisweni kwepulasitiki kanye nokugcinwa kwamanzi okuthuthukisiwe ekufakweni kodaka. Lesi sici sibalulekile, njengoba sisiza ukuvimbela ukuqhekeka kwezakhiwo, ngaleyo ndlela andise impilo nokuzinza kokwakhiwa. Ngokufanayo, kumongo we-ceramic tile mortar, i-HPMC ithuthukisa hhayi kuphela ukugcinwa kwamanzi kodwa futhi nokunamathela kanye nepulasitiki, okubalulekile ekusetshenzisweni okuphumelelayo nokuphila isikhathi eside ngaphandle kokukhishwa kwempushana.
Ngaphezu kwalokho, i-HPMC ithobelana nemithetho eqinile yokuphepha, iqashelwa njengesengezo sokudla esingenabo ubuthi ukuze sisetshenziswe, esingenalo inani lekhalori futhi singacasuli isikhumba nolwelwesi lwamafinyila. Ngokweziqondiso ze-FDA kanye ne-FAO/WHO, ukuthathwa okuvunyelwe kwansuku zonke kwe-HPMC kusethwe ku-25mg/kg, kuhlinzeka isiqiniseko sokusetshenziswa kwayo ezinhlelweni ezihlukahlukene. Kodwa-ke, izinyathelo zokuphepha ziyadingeka lapho uphatha i-HPMC ukuze kuqinisekiswe ukuphepha phakathi nokusetshenziswa kwayo. Kuyalulekwa ukuthi ugqoke amagiya okuvikela, ugweme ukuchayeka emithonjeni yomlilo, futhi unciphise ukukhiqiza uthuli ezindaweni ezivaliwe ukuze unciphise izingozi zokuqhuma. Ngaphezu kwalokho, i-HPMC kufanele igcinwe endaweni eyomile, enomoya omuhle, evikelekile elangeni eliqondile kanye nomswakama, ngokunakekelwa okudingekayo ngesikhathi sokuthutha ukuyivikela emvuleni nakwezinye izimo zezulu. I-HPMC ipakishwe ngokuvikelekile ezikhwameni ezingama-25 kg ezenziwe nge-polypropylene, ezifakwe i-polyethylene ukuze zivikeleke okwengeziwe, okuqinisekisa ukuthi umkhiqizo uhlala uvaliwe futhi unjalo kuze kube yilapho usetshenziswa.
