Pehea ka hopena o ke ʻala o ka hydroxypropyl methylcellulose i ka maikaʻi?

He aha nā hopena o ka nui o ke ʻala ma ka hydroxypropyl methylcellulose:

Hoʻohuihui ʻana ohydroxypropyl methylcelluloseE mālama i ka cellulose pulupulu i hoʻomaʻemaʻe ʻia me ka lye ma 35-40°C no ka hapalua hola, kaomi, kuʻi i ka cellulose, a hoʻomaʻamaʻa pono ma 35°C, i hiki ai i ke kiʻekiʻe awelika o ka polymerization o ka alkali i loaʻa i loko o nā fibers laulā i makemake ʻia. E hoʻokomo i ka fiber alkali i loko o ka ipuhao etherification, e hoʻohui i ka propylene oxide a me ka methyl chloride ma ke kaʻina, a etherify ma 50-80°C no 5 mau hola, ʻo ke kaomi kiʻekiʻe loa ma kahi o 1.8MPa. A laila e hoʻohui i kahi nui kūpono o ka hydrochloric acid a me ka oxalic acid i ka wai wela ma 90°C e holoi i ka mea e hoʻonui i ka nui. E hoʻomaloʻo i loko o kahi centrifuge. E holoi me ka wai a hiki i ka neutral. Ke emi ka nui o ka makū o ka mea ma mua o 60%, e hoʻomaloʻo me kahi kahawai ea wela ma 130°C a hiki i ka emi ʻana o ka makū ma mua o 5%.

Hoʻohana ka HPMC i hana ʻia e ke ʻano solvent i ka toluene a me ka isopropanol ma ke ʻano he solvents. Inā ʻaʻole maikaʻi ka holoi ʻana, e koe ana kekahi ʻala palupalu. I kēia manawa, ʻokoʻa loa ke ʻano o ka hydroxypropyl methylcellulose HPMC kūloko, a ʻokoʻa loa ke kumukūʻai, e paʻakikī ai i nā mea kūʻai ke hana i ke koho kūpono. ʻO kēia ka pilikia o ke kaʻina holoi, ʻaʻole ia e hoʻopilikia i ka hoʻohana ʻana a ʻaʻohe pilikia, ʻaʻole pono ka HPMC maʻemaʻe e honi i ka ammonia, starch a me ka waiʻona; Hoʻohuihui ʻiaHPMChiki ke honi pinepine i nā ʻano ʻala like ʻole, ʻoiai inā he ʻono ʻole, e kaumaha ia. Eia nō naʻe, he ʻala ikaika loa ka hydroxypropyl methylcellulose i hana ʻia e nā mea hana he nui a he ʻala ʻawaʻawa hoʻi. ʻAʻole kūlike ke ʻano me ka maikaʻi.

Loaʻa ka Hypromellose ma ka hoʻomohu ʻana i ka pulupulu i hoʻomaʻemaʻe ʻia me ka wai kakaikahi e loaʻa ai ka cellulose alkaline, a laila e hoʻohui i ka solvent, etherification agent, toluene, a me isopropanol no ka hopena etherification, neutralizing cleansing, maloʻo, kuʻi, a pēlā aku e loaʻa ai nā huahana i hoʻopau ʻia. ʻAe, e loaʻa kahi ʻala, no laila hiki i nā mea hoʻohana ke hoʻohana me ka hilinaʻi.