Izindawo ezihlukile zokusebenzisa kufanele zikhethe ama-viscosities ahlukile we-cellulose HPMC

I-Hydroxypropylmethylcellellose (HPMC) iyi-cellulose ether etholakala kwimithombo yemvelo efana nama-solip we-Wood Pulp kanye nama-Literstogi. Ngenxa yezakhiwo zayo ezihlukile, kufaka phakathi i-solubity yamanzi, amandla okuqina, izakhiwo ezakha amafilimu, njll., Kusetshenziswa kabanzi kwizimboni ezahlukahlukene. Enye yezinto ezibalulekile okufanele ucatshangelwe lapho usebenzisa i-HPMC ukubonwa kwayo, okungathinta kakhulu ukusebenza kwawo ezindaweni ezihlukile zokusebenzisa. Kulesi sihloko, siyaxoxa ukuthi kungani i-cellulose HPMC ene-visosities ehlukene kufanele ikhethelwe izindawo ezihlukile zokusebenzisa, nokuthi i-viscosity efanele ingasiza kanjani ukusebenza kahle kwe-HPMC.

I-Viscosity iyisihlobo sokumelana koketshezi ukuze igeleze futhi ingukucatshangelwa okubalulekile lapho ukuklama imikhiqizo edinga izici ezithile zokugeleza. I-Viscesity ithinta ukusebenza kwe-HPMC ngoba inquma amandla ayo okwenza ama-gels, athinta i-PH yesisombululo, ubukhulu bokuhlanganiswa kwemininingwane, nezinye izakhiwo ezibonakalayo. I-HPMC iyatholakala kumabanga okubona ahlukahlukene, izinhlobo ezivame kakhulu ukuba se-viscosity ephansi (i-LV), i-medium viscosity (MV) kanye ne-viscosity ephezulu (HV). Ngayinye yalezi zinhlobo inenhloso ethile futhi ilungele imvelo ethile.

I-Viscosity ephansi (LV) HPMC

I-viscosity ephansi i-HPMC inesisindo esiphansi se-molecular futhi iyancibilika kalula emanzini. Uhlobo oluvame kakhulu lwe-HPMC futhi lusetshenziswa ezinhlobonhlobo zezimboni ezibandakanya ukudla, izimonyo, ukwakhiwa kanye nemithi. I-LV HPMC ilungele kangcono izinhlelo zokusebenza ezidinga izixazululo ze-viscosity eziphakathi ezinjengama-gels acacile, ama-emulsion kanye nopende. I-LV HPMC nayo ingasetshenziswa ukunweba impilo yeshelufu yokudla, ukunciphisa i-syneresis futhi inikeze ukuthungwa okubushelelezi.

I-LV HPMC nayo isetshenziswa njalo embonini yezokwakha ukuthuthukisa ukusebenziseka kwezinto ezisetshenziswayo zikasimende ezinjengezidakamizwa, ama-grouts kanye namathayela anamathela. Kuyasiza ukunciphisa ukulahleka kwamanzi ekuxubeni usimende, kuvimbela ukuqhekeka, futhi kuqinise isibopho phakathi kwezinto zokwakha. I-LV HPMC nayo isetshenziselwa ukukhulisa amandla nokuqina kodaka, i-tucco nezinye izinto ezihlobene.

I-Medium Viscosity (MV) HPMC

I-Medium Viscosity HPMC inesisindo esiphakeme se-molecular kune-LV HPMC futhi ayincibilikise emanzini. Ngokuvamile kusetshenziswa kuzinhlelo zokusebenza ezidinga izixazululo ezihlanganisiwe ezifana nezimbathi, ama-varnish kanye nama-inks. I-MV HPMC inokulawulwa okungcono kwe-flow kanye nezakhiwo zohlelo lokusebenza kune-LV HPMC, okuholele ekugqilazweni kwefilimu okufanayo. I-MV HPMC nayo ingasetshenziswa ngaphezu kobubanzi be-PH, ukuhlinzeka ngezindlela ezingeziwe zokusebenzisa izinhlelo ezahlukahlukene.

I-MV HPMC nayo isetshenziswa kabanzi emikhiqizweni yezemithi, njengamaphilisi okukhishwa alawulwayo, njengoba kubambezela ukuhlukaniswa futhi ngenxa yalokho kwandiswa ukukhishwa kwezithako ezisebenzayo.

I-Viscosity ephezulu (HV) HPMC

I-viscosite ephezulu i-HPMC inesisindo esiphakeme kakhulu samangqamuzana awo wonke amabanga amathathu futhi yinto encane kakhulu yamanzi. Ngokuvamile kusetshenziswe kuzinhlelo zokusebenza ezidinga ukuqina nokuqina kwezindawo, ezinjengososo, okhilimu kanye namajeli. I-HV HPMC isiza ukuthuthukisa ukuthungwa kanye nokubonakala kwemikhiqizo, ukuhlinzeka ngolwazi olumnandi kakhulu lomsebenzisi. Ingasetshenziswa futhi ukuzenzisa ama-emulsions, kuvikele ukulungisa nokwandisa impilo eshalofini. Ngokwengeziwe, i-HV HPMC ivame ukusetshenziswa embonini yamaphepha ukuthuthukisa amandla ephepha nokuphrinta.

Ekuphetheni

I-viscosity efanele ye-HPMC ibalulekile ukwenza kahle ukusebenza kwayo ezindaweni ezihlukile zokusebenzisa. I-LV HPMC ilungele kangcono izinhlelo zokusebenza ezidinga izixazululo ze-viscosity eziphakathi, ngenkathi i-MV HPMC ilungele izixazululo ezinkulu ezifana nopende, ama-varnish kanye nama-inks. Ekugcineni, i-HV HPMC ilungele izinhlelo zokusebenza ezidinga ukuqina nokuqina kwezindawo ezinjengamakhilimu, ama-gels kanye namasoso. Ukukhetha i-viscosity efanele kungasiza ekuthuthukiseni ukusebenza okuphelele kwe-HPMC futhi kwenze kubekele kakhulu izicelo ezihlukile.