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Hydroxypropyl Methyl Cellulose (HPMC)
Hydroxypropyl methyl cellulose, faaohie i te propyl methyl cellulose (HPMC hydroxypropylmethylcellulose, whakapoto), he mea ki te no ki te momo o te whakauru kore-katote cellulose etera. He polymer hangarua, kore hohe, viscoelastic e whakamahia nuitia ana i roto i te ophthalmology hei whakahinuhinu, hei whakahinuhinu, hei whakangao ranei i roto i nga rongoa waha, ka kitea i roto i nga momo taonga maha. Ka taea te whakamahi i te Hydroxypropyl cellulose hei taapiri kai, he emulsifier, he whakamaarama, he kaihoko whakatara me te whakakapi gelatin kararehe.
NGA MEA WHAKAMAHI Te ahua Paura ma Te Pawera Whakapara 200min Te Pawera Whakarereketanga 190-200 ℃ Poneke 400 Uara PH 5~8 Kiato 1.39g/cm3 Te pāmahana waro 280-300 ℃ Momo Koeke kai Ihirangi 99% Te mahunga o te mata 42-56dyne/cm mo te 2% wairewa wai -
Hydroxypropyl Methylcellulose (MHPC)
Ko te Hydroxypropyl methylcellulose (MHPC) he haunga kore, he reka, he etera cellulose kore paitini kua whai roopu hyrdroxyl i runga i te mekameka cellulose hei whakakapi mo te roopu methoxy, hydroxypropyl ranei me te wairewa pai. Ko te HPMC F60S he karaehe-nui-nui e whakamahia ana hei whakakaha, hei here, me te kiriata o mua i roto i nga matū ahuwhenua, paninga, karamu, whakapiri, waituhi, me etahi atu tono.
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Hydroxyethyl Cellulose (HEC)
Ko te Hydroxyethyl Cellulose(HEC) he polymer kore-katote, he wai-wairewa i ahu mai i te ahua cellulose i roto i te raupapa o nga tikanga matū me te tinana. HEC he ma ki te marama kowhai, he hongi me te reka o te paura, ka whakarewahia i roto i te wai wera, makariri ranei hei hanga i te wairewa gel viscous.I te pH i roto i te wairewa 2 ki te 12, he tino pumau te otinga. I te mea ko te roopu HEC he nonionic i roto i te wairewa wai, kare e tauhohe ki etahi atu anion, kation ranei, karekau ki nga tai.
Engari ka taea e te ngota ngota HEC te whakaputa i te esterification, te whakaetere, na reira ka taea te hanga i te wairewa i roto i te wai, te whakapai ake ranei i ona taonga.He pai hoki te kaha o te hanga kiriata me te mahi mata o te HEC.
