Hydroxypropyl methyl cellulose hpmc, e kiia ana ko te hydroxypromellose, he ma ki te puehu waikawa ma te kiri o te wai makariri me te koretake o te wai wera. Ko te roopu hydroxypropyl me te roopu methyl he kowhatu a te cellusous me te haona o te cellulose, he ahua o te cellulose kore-inoic whakaranu. Ko te semi-miiharo, kaore i te kaha, ko Viscoelastic e whakamahia ana hei miihini i Ophthalmology, he mea hihiri, he maamaa ranei i roto i nga rongoa a-waha.
1. Te tukanga whakaputa
Ko te penupenu kraft me te ihirangi αcellullose o te 97%, te nui o te muka o te 720ml / G me te otinga o te muka o te 2.6% i te 49% mo te 50 hēkona. Katahi ka toro atu te penupenu ki te tango i te taapiri 49% o te otinga naoh hei tiki i te cellulose alkali. Ko te ōwehenga taumaha o (49% otinga a Noan Aquious) ki (te waahanga totoka o te penupenu) i te tau (te reanga taumaha o Naoh i te cellulose ackali ki te totoka ki te penupenu ki te penupenu. Ko te Cellupose alkali e whiwhi ana (20kg) i roto i te reanga pehanga a-roto, katahi ka ngoikore, ka purea ki te hauota kia pai te tango hāora i te kaiwhakaora. Na, ko te pāmahana i roto i te kaiwhakarewa i whakahaerehia i te 60 ℃ i te wa i mahia ai te whakaohooho o roto.
Katahi ka tapiritia te DME 2.4kg me te pāmahana i roto i te kaiwhakanao i whakahaerehia ki te 60 ℃. I muri i te taapiri o te eter i te Eter, i honoa te paanga o te kohukohu o te alkaline celluline ki te hauhautanga o te kaitao. I muri i te taapiri i te chloromethane me te propolene oxide, te pāmahana i roto i te kaiwhakawao i whakahaerehia mai i te 80 ℃ ki te 90 ℃. I tua atu, ko te tauhohenga kua tau mo te 20 meneti i te 90 ℃.
Ka heke te hau mai i te kaiwhakanao me te hydroxypropyl hydroxypropy methyl cellulise mai i te kaiwhakanao. Ko te pāmahana o te hydroxypropyl methyl cellulose 62 ℃. Whakanuia te rahi 50% rahi matūriki i roto i te tohatoha rahi matūriki taimaha i runga i te ōwehenga o te hydroxypropyl celudrooxyprose na roto i nga tuwhera o te mahi tokowhitu, he rahi te whakatuwhera.
I te mutunga, ko te rahi o te matūriki toharite o nga matūriki koi te 6.2mm. Ko te whiwhinga o te hydroxypropypyproxypropyl methyl i whakauruhia ki roto i te reanga biaxial tonu (KRC Baddander S1, L / D = 10.2, te rahi o roto: I runga i nga mehua rite ma te whakamahi i nga mata 5 me nga rahi o te whakatuwhera, ko te rahi o te matūriki toharite ko te 1.4mm. Te taapiri i te 80 ¼ te wai wera ki te waikawa kino o te hydroxypropyr seldelroxypyl i roto i te tank me te mana pāmahana o te koti. Ko te nui o te paanga o te taumaha o te hydroxypropyl kino o te hydroxypropyl cellulose ki te tapeke o te slurry ko 0.1, a ka riro te whakama. I whakaohohia te Slurry i te pāmahana tonu o te 80 ℃ mo te 60 meneti.
Na, ka tukuna te putiputi ki te tere hurihuri o te 0.5 rpm me te tātari pehanga hurihuri o mua (nga hua bhs sonthofen). Ko te pāmahana o te grout ko te 93 ℃. Whakamahia he papu hei tuku i te slurry, ko te pehanga whakaheke pupuhi ko te 0.2mmpa. Ko te rahi o te whakatuwhera o te tātari pehanga hurihuri ko te 80μm, ko te rohe tātari ko te 0.12m2. Ko te slurry i tukuna ki te tātari pehanga hurihuri ka tātarihia ki te tātari me te huri ki te keke tātari. Ko te keke tātari hua ka tukuna me te 0.3mpa Steam me te 95 ℃ te wai wera me te paanga taumaha o te 10.0 ki te waahanga totoka o te hydroxypropy methyl cellulose, ka tātarihia ki te tātari.
Ko te wai wera ka tukuna ma te papu i te pehanga o te 0.2mpa. I muri i te wa wera ka tukuna mai, ka tukuna mai te 0.3mpa Steam. Na, i muri i te whakahekenga o nga hua horoi mai i te papa tātari e te kaihoroi ka tukuna mai i te miihini horoi. Ko nga hikoinga mai i te tuku i te slurry ki te tuku i nga hua kua horoia ka mau tonu. Ka rite ki te ine i te wera - te whakamaroke i te hygrometer, te kiko wai o te hua horoia ka kiia ko te 52.8%. Ko nga hua horoia ka tukuna mai i te tātari Press Press i maroke e tetahi miihini hau i te 80 ℃, ka pakaru i te mira toa kia whiwhi koe i te cellulase hydroxypropyl.
2.apāpā
Ka whakamahia te hua HPMC hei threckener, marara, pia, emulsifier me te whakatuu i roto i te umanga kakano. I whakamahia whānuitia i roto i te riihi konutai, te hinu, te hinu, te pepa, te rongoa, te kai, te hinu me etahi atu umanga.
Te wa tuku: Mar-23-2022