Hydroxypropyl Methyl Cellulose HPMC
Hydroxypropyl methylcellulose (HPMC), non-ionic cellulose ether, imachokera ku cellulose yachilengedwe kudzera munjira zambiri zama mankhwala. Ufa woyera uwu umadziwika ndi chikhalidwe chake chopanda fungo komanso chosasangalatsa, chomwe chimachititsa kuti chisakhale cha poizoni komanso chotetezeka kwa ntchito zosiyanasiyana. Chimodzi mwazinthu zake zodziwika bwino ndikutha kusungunuka m'madzi ozizira, zomwe zimapangitsa kuti pakhale njira yowoneka bwino ya viscous. HPMC ali ndi yotakata ya zinchito katundu, kuphatikizapo thickening, adhesion, kubalalitsidwa, emulsification, ndi filimu kupanga mphamvu. Kuphatikiza apo, imachita bwino pakusunga chinyezi, gelation, ndi zochitika zapamtunda, ndikupangitsa kuti ikhale yosunthika m'mafakitale ambiri, monga mankhwala, kupanga chakudya, zomangamanga, ndi zodzola.
M'gawo la zomangamanga, HPMC imapeza ntchito zambirimbiri zofunika kupititsa patsogolo luso lazomangamanga. Mwachitsanzo, ikaphatikizidwa mu slurry ya mchenga wa simenti, HPMC imathandizira kwambiri kuti zinthuzo zisafalikire, zomwe zimapangitsa kuti pulasitiki ikhale yabwino komanso kusunga madzi bwino pakuyika matope. Mbali imeneyi ndi yofunika kwambiri, chifukwa imathandiza kuti nyumbayo isaphwanyike, motero imakulitsa moyo ndi kukhazikika kwa zomangamanga. Momwemonso, pankhani ya matope a ceramic matailosi, HPMC imapangitsa kuti madzi asasungidwe kokha komanso kumamatira ndi pulasitiki, zomwe ndizofunikira kuti zigwiritsidwe ntchito moyenera komanso moyo wautali popanda nkhani ya ufa.
Kuphatikiza apo, HPMC imagwirizana ndi malamulo okhwima otetezedwa, kuzindikirika ngati chowonjezera chopanda poizoni kuti chigwiritsidwe ntchito, chopanda phindu la caloric komanso chosakwiyitsa pakhungu ndi mucous nembanemba. Malinga ndi malangizo a FDA ndi FAO/WHO, kuloledwa kwa tsiku ndi tsiku kwa HPMC kumayikidwa pa 25mg/kg, kupereka chitsimikizo cha kugwiritsidwa ntchito kwake m'mapulogalamu osiyanasiyana. Komabe, kusamala ndikofunikira mukamagwira HPMC kuonetsetsa chitetezo pakagwiritsidwe ntchito. Amalangizidwa kuvala zida zodzitchinjiriza, kupewa kukhudzana ndi zozimitsa moto, komanso kuchepetsa kutulutsa fumbi m'malo otsekedwa kuti muchepetse ziwopsezo zophulika. Komanso, HPMC iyenera kusungidwa pamalo owuma, olowera mpweya wabwino, otetezedwa ku dzuwa ndi chinyezi, ndi chisamaliro chofunikira pamayendedwe kuti chiteteze ku mvula ndi nyengo zina. HPMC imayikidwa bwino m'matumba a 25 kg opangidwa ndi polypropylene, okhala ndi polyethylene kuti atetezedwe, kuwonetsetsa kuti katunduyo amakhalabe osindikizidwa komanso osasunthika mpaka atagwiritsidwa ntchito.
