Hydroxypropyl Methyl Cellulose HPMC
Hydroxypropyl methylcellulose (HPMC), isiri-ionic cellulose ether, inotorwa kubva kune yakasikwa cellulose kuburikidza neakaomesesa akatevedzana emakemikari maitiro. Iyi poda chena inoratidzirwa nekusanhuhwirira kwayo uye kusinganakidze hunhu, ichiita kuti ive isina chepfu uye yakachengeteka kune akasiyana maapplication. Chimwe chezvinhu zvayo zvinozivikanwa ndiko kukwanisa kwayo kunyungudika mumvura inotonhora, zvichiita kuti pave nemhinduro yakajeka ye viscous. HPMC ine huwandu hwakawanda hwezvinhu zvinoshanda, zvinosanganisira kukora, kunamatira, kupararira, emulsification, uye kugona kugadzira firimu. Pamusoro pezvo, inokunda mukuchengetedza hunyoro, gelation, uye chiitiko chepamusoro, zvichiita kuti ive musanganiswa unogoneka mumaindasitiri mazhinji, akadai semishonga, kugadzira chikafu, kuvaka, uye zvekuzora.
Muchikamu chekuvaka, HPMC inowana zviuru zvezvikumbiro zvakakosha mukusimudzira kunaka uye kushanda kwezvinhu zvekuvaka. Semuyenzaniso, kana yaiswa mu simende-jecha slurry, HPMC inonatsiridza zvakanyanya kupararira kwechinhu, zvichikonzera kukwidziridzwa kwepurasitiki uye nekunatsiridza kuchengetwa kwemvura mukushandiswa kwedhaka. Ichi chikamu chakakosha, sezvo chinobatsira kudzivirira kuputika kwezvivakwa, nekudaro kuwedzera hupenyu nekugadzikana kwekuvaka. Saizvozvowo, mumamiriro ezvinhu e-ceramic tile mortar, HPMC inovandudza kwete kuchengetwa kwemvura chete asiwo kunamatira uye plastiki, izvo zvakakosha pakushanda kunobudirira uye hupenyu hurefu pasina nyaya yehupfu.
Uyezve, HPMC inoenderana nemirairo yakasimba yekuchengetedza, ichizivikanwa senge isiri-chepfu yekuwedzera chikafu yakachengeteka kuti ishandiswe, isina caloric kukosha uye isingatsamwire ganda uye mucous membranes. Zvinoenderana neFDA neFAO/WHO nhungamiro, kudyiwa kwezuva nezuva kweHPMC kunoiswa pa25mg/kg, zvichipa vimbiso yekushandiswa kwayo mukushandisa kwakasiyana. Nekudaro, kungwarira kunodiwa kana uchibata HPMC kuve nechokwadi chekuchengetedza panguva yekushandisa kwayo. Zvinokurudzirwa kupfeka giya rekudzivirira, kudzivirira kuratidzwa kune zvitubu zvemoto, uye kuderedza kugadzirwa kweguruva munzvimbo dzakavharwa kudzikamisa njodzi dzinoputika. Uyezve, HPMC inofanirwa kuchengetwa munzvimbo yakaoma, ine mhepo inofefetera zvakanaka, yakachengetedzwa kubva kune yakananga zuva uye hunyoro, nekutarisisa kunodiwa panguva yekufambisa kuidzivirira kubva kumvura uye zvimwe mamiriro ekunze. HPMC inoiswa zvakachengeteka mumabhegi e25 kg akagadzirwa nepolypropylene, akaiswa polyethylene kuti awedzere kuchengetedzwa, kuve nechokwadi chekuti chigadzirwa chinoramba chakavharwa uye chakasimba kusvika chashandiswa.
