Izindawo ezihlukene zokusebenzisa kufanele zikhethe ama-viscosity ahlukene we-cellulose HPMC

IHydroxypropylmethylcellulose (HPMC) iyi-ether ye-cellulose etholakala emithonjeni yemvelo efana ne-pulp yokhuni nama-linter kakotini. Ngenxa yezakhiwo zayo eziyingqayizivele, okuhlanganisa ukuncibilika kwamanzi, ikhono lokuqina, izakhiwo zokwakha ifilimu, njll., isetshenziswa kabanzi ezimbonini ezihlukahlukene. Enye yezinto ezibalulekile okufanele icatshangelwe lapho usebenzisa i-HPMC i-viscosity yayo, engathinta kakhulu ukusebenza kwayo ezindaweni ezihlukene zokusetshenziswa. Kulesi sihloko, sidingida ukuthi kungani i-cellulose HPMC ene-viscosity ehlukene kufanele ikhethelwe izindawo ezihlukene zokusetshenziswa, nokuthi i-viscosity elungile ingasiza kanjani ekuthuthukiseni ukusebenza kwe-HPMC.

I-viscosity isilinganiso sokumelana koketshezi nokugeleza futhi iwukucatshangelwa okubalulekile lapho uklama imikhiqizo edinga izici ezithile zokugeleza. I-Viscosity ithinta ukusebenza kwe-HPMC ngoba inquma amandla ayo okwenza amajeli, okuthinta i-pH yesixazululo, ukushuba kokumboza, nezinye izici ezibonakalayo. I-HPMC itholakala kumabanga ahlukahlukene e-viscosity, izinhlobo ezivame kakhulu i-viscosity ephansi (LV), i-viscosity ephakathi (MV) kanye ne-viscosity ephezulu (HV). Ngayinye yalezi zinhlobo inenhloso ethile futhi ifanele indawo ethile.

I-Viscosity Ephansi (LV) HPMC

I-viscosity ephansi I-HPMC inesisindo se-molecule ephansi futhi incibilika kalula emanzini. Iwuhlobo oluvame kakhulu lwe-HPMC futhi isetshenziswa ezimbonini eziningi ezahlukahlukene ezihlanganisa ukudla, izimonyo, ezokwakha kanye nemithi. I-LV HPMC ifaneleka kakhulu izinhlelo zokusebenza ezidinga izixazululo ze-viscosity ephansi kuya emaphakathi njengamajeli acacile, ama-emulsion namapende. I-LV HPMC ingasetshenziswa futhi ukwelula impilo yeshalofu yokudla, ukunciphisa i-synersis kanye nokuhlinzeka ngokuthungwa okubushelelezi.

I-LV HPMC ibuye isetshenziswe njalo embonini yezokwakha ukuze kuthuthukiswe ukusebenza kwempahla esekwe usimende njengodaka, ama-grouts namathayela anamathelayo. Kuyasiza ekunciphiseni ukulahlekelwa kwamanzi kuzingxube zikasimende, kuvimbele ukuqhekeka, futhi kuqinise isibopho phakathi kwezinto. I-LV HPMC iphinde isetshenziselwe ukukhulisa amandla nokuqina kwe-plaster, istucco nezinye izinto ezihlobene.

I-Medium Viscosity (MV) HPMC

I-viscosity emaphakathi I-HPMC inesisindo semolekyuli ephakeme kune-LV HPMC futhi ayincibiliki kalula emanzini. Ngokuvamile isetshenziswa ezinhlelweni ezidinga izixazululo ezigxile kakhulu ezifana nama-coatings, ama-varnishes noyinki. I-MV HPMC inokulawula ukugeleza okungcono kanye nezakhiwo zohlelo kune-LV HPMC, okuholela ekushubeni okufanayo nokungaguquguquki kwefilimu. I-MV HPMC ingasetshenziswa futhi ebangeni le-pH elibanzi, inikeze ukuguquguquka okwengeziwe kwezinhlelo zokusebenza ezahlukahlukene.

I-MV HPMC iphinde isetshenziswe kabanzi emikhiqizweni yezemithi, njengamaphilisi okukhululwa okulawulwayo, njengoba ibambezela ukuhlakazeka futhi ngaleyo ndlela andise ukukhululwa kwezithako ezisebenzayo.

I-High Viscosity (HV) HPMC

I-viscosity ephezulu I-HPMC inesisindo samangqamuzana esiphezulu kakhulu kuwo wonke amabanga amathathu futhi iyona encane encibilikayo emanzini. Isetshenziswa ngokujwayelekile ezinhlelweni ezidinga ukujiya nokuzinza, njengamasoso, okhilimu namajeli. I-HV HPMC isiza ukuthuthukisa ukuthungwa kanye nokubonakala kwemikhiqizo, ihlinzeka ngolwazi lomsebenzisi olumnandi kakhulu. Ingase futhi isetshenziselwe ukuzinzisa ama-emulsions, ukuvimbela ukuhlalisa kanye nokwelula impilo yeshalofu. Ukwengeza, i-HV HPMC ivamise ukusetshenziswa embonini yamaphepha ukuze kuthuthukiswe amandla ephepha nokuphrinta.

Ekuphetheni

I-viscosity efanele ye-HPMC ibalulekile ukuze kuthuthukiswe ukusebenza kwayo ezindaweni ezihlukahlukene zokusetshenziswa. I-LV HPMC ifaneleka kakhulu ezinhlelweni ezidinga izixazululo ze-viscosity ephansi kuya emaphakathi, kuyilapho i-MV HPMC ifanele izixazululo eziqinile ezifana nopende, amavashi noyinki. Okokugcina, i-HV HPMC ilungele izinhlelo zokusebenza ezidinga izakhiwo zokujiya neziqinisayo ezifana nokhilimu, amajeli namasoso. Ukukhetha i-viscosity efanele kungasiza ukuthuthukisa ukusebenza kukonke kwe-HPMC futhi kuyenze ifaneleke kakhulu izinhlelo zokusebenza ezahlukene.