Me pehea te whakamatautau i te pokey o te hydroxypropyl methylcellulose?

Ko te Hydroxypropyl methylcellulose mo te hanga me karo i te kuhu o te wai ki roto i te pakitara, me te pupuri i te nui o te wai i roto i te kumete ka taea e te ciment te whakaputa i nga mahi pai mo te wai me te wai. Hydroxypropyl methylcellulose Ko te viscosity o te cellulose i roto i te kumete he rite tonu te rite, te teitei ake te pokey, te pai ake te pupuri wai o hydroxypropyl methylcellulose.

Ina he tiketike rawa te makuku o te hydroxypropyl methylcellulose, ka heke te pupuri wai o te hydroxypropyl methylcellulose, e tika ana te heke o te kaha o te hanga o te hydroxypropyl methylcellulose. Kei te mohio ano tatou ki nga mea ka nui ake te he. Me pupuri tonu tatou i te mea hou ka whiwhi hua ohorere.

Ko te tino pokey he tohu nui mo te hydroxypropyl methylcellulose. Ko nga tikanga whakatau tikanga ko te viscometry hurihuri, viscometry capillary me te viscometry ngahuru.

I mua, ko te tikanga whakatau o te hydroxypropyl methylcellulose he viscometry capillary, ma te whakamahi i te Ubbelohde viscometer. Ko te tikanga ko te otinga whakatau he wairewa wai o te 2, a ko te tauira: V=Kdt. Ko te V hei tohu mo te pokey, ko te waeine ko , Ko te K te taumau o te inetere, d e tohu ana i te kiato i te pāmahana tuturu, ko te t e tohu ana ki te wa mai i runga ki raro i roto i te viscometer, he tuarua s te waeine. He tino uaua tenei tikanga ki te whakahaere, a mena he matū karekau e rewa, he ngawari te mahi he, he uaua ki te tautuhi i te kounga o te hydroxypropyl methylcellulose.

Ko te raruraru o te whakakore i te kopa hanga he raruraru nui e pa ana ki nga kaihoko. Tuatahi o nga mea katoa, me whakaaro te raruraru o te rauemi mata i roto i te delamination o te kāpia hanga. Ko te take matua mo te whakakore i te kapia hanga ko te waipiro polyvinyl (PVA) me te hydroxypropyl methylcellulose (HPMC). na te hotokoretanga. Tuarua, na te mea kare i ranea te wa whakakorikori; i tua atu, e kore e pai te mahi thickening o te kāpia hanga.

I roto i te kapia hanga, me whakamahi te hydroxypropyl methylcellulose (HPMC) inamata, na te mea ka marara noa te hydroxypropyl methylcellulose (HPMC) ki te wai kaore he tino rewa. Tata ki te 2 meneti, ka piki haere te pokey o te wē, ka puta he colloid karekau marama.

Ko nga hua rewa wera, ka tutakina ki te wai matao, ka tere te marara i roto i te wai wera ka ngaro ki te wai wera. Ka taka te pāmahana ki tetahi pāmahana, ka ata puta te pokey tae noa ki te hanga i te colloid viscous marama. Ko te nui o te hydroxypropyl methylcellulose (HPMC) kua tohua ki te kapia hanga he 2-4kg.

Ko te Hydroxypropyl methylcellulose (HPMC) he matū pūmau, he ātete ki te koriri, he pai te pupuri i te wai i roto i te kāpia hanga, kaore e pa ki nga huringa o te uara pH. Ka taea te whakamahi me te viscosity mai i te 100,000 S ki te 200,000 S. Engari i roto i te hanga, te teitei o te pokey, te pai ake. Ko te pokey he taurite ki te kaha here. Ko te teitei o te pokey, ka iti ake te kaha. Ko te tikanga, he pai te pokey o te 100,000 S.