Ko te tono matua o te hydroxypropyl methylcellulose

1. He aha te whakamahinga matua o te hydroxypropyl methylcellulose (HPMC)?

Kei te whakamahia nuitia te HPMC ki nga taonga hanga, paninga, kapia waihanga, karamu, rongoa, kai, kakano, ahuwhenua, whakapaipai, tupeka me etahi atu ahumahi. Ka taea te wehewehea te HPMC ki te tohu hangahanga, te karaehe kai me te karaehe rongoa e ai ki te kaupapa. I tenei wa, ko te nuinga o nga hua o te kaainga he tohu hanga. I roto i te hanganga hanga, ka whakamahia te paura putty i roto i te nui nui, mo te 90% e whakamahia ana mo te paura putty, ko te toenga ka whakamahia mo te moata ciment me te kopa.

2. He maha nga momo o te hydroxypropyl methylcellulose (HPMC), a he aha nga rereketanga o o raatau whakamahinga?

Ka taea te wehewehea te HPMC ki te momo tere me te momo wera-whakarewa. Ka marara te momo hua inamata ki te wai matao ka ngaro ki te wai. I tenei wa, karekau he pokarekaretanga o te wai na te mea ka marara noa te HPMC ki te wai karekau 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 momo wera-rewa ka taea anake te whakamahi i te paura putty me te moata. I roto i te kapia wai me te peita, ka whakarōpūhia nga ahuatanga kaore e taea te whakamahi. Ko te momo inamata he whanui ake nga tono. Ka taea te whakamahi ki te paura putty me te kumete, me te kapia wai me te peita, kaore he tohu.

3. He aha nga tikanga whakakore o te hydroxypropyl methylcellulose (HPMC)?

Tikanga wetewete wai wera: I te mea karekau te HPMC e memeha ki te wai wera, ka taea te marara o te HPMC ki te wai wera i te wa tuatahi, ka tere te memeha ina whakamatao. E rua nga tikanga angamaheni e whakaahuatia ana e whai ake nei:

1) Kuhua te nui o te wai wera ki roto i te ipu ka whakamahana ki te 70°C. Ko te hydroxypropyl methylcellulose i āta tapirihia i raro i te whakaoho puhoi, i te tuatahi ka maanu te HPMC ki runga i te mata o te wai, katahi ka hanga he slurry, ka whakamataohia i raro i te whakakorikori.

2), tāpirihia te 1/3, te 2/3 rānei o te nui o te wai e hiahiatia ana ki roto i te ipu, ka whakamahana ki te 70°C, whakamararatia te HPMC kia rite ki te tikanga o te 1), me te whakarite i te slurry wai wera; kātahi ka tāpirihia te toenga o te wai matao ki te slurry wai wera, ka whakamataohia te ranunga i muri i te whakaoho.

Te tikanga whakaranu i te paura: uruhia te paura HPMC me te maha o etahi atu matū paura, uru pai ki te whakaranu, katahi ka tapirihia he wai kia memeha, katahi ka taea te rewa te HPMC i tenei wa kaore he whakahiato, no te mea he iti noa te HPMC i roto i ia iti. kokonga Paura, ka memeha tonu ina pa ana ki te wai. ——Kei te whakamahi nga kaihanga paura putty me te mota i tenei tikanga. [Hydroxypropyl methylcellulose (HPMC) e whakamahia ana hei whakakaha me te pupuri wai i roto i te kumete paura putty. ]

4. Me pehea te whakatau i te kounga o te hydroxypropyl methylcellulose (HPMC) ngawari me te mohio?

(1) Maama: Ahakoa kaore e taea e te maama te whakatau he ngawari te whakamahi i te HPMC, a, ki te taapirihia nga maaka ma i te wa o te mahi whakaputa, ka pa ki tona kounga. Engari, ko te nuinga o nga hua pai he pai te ma.

(2) Pai: Ko te pai o te HPMC he 80 mesh me te 100 mesh, he iti ake te 120 mesh. Ko te nuinga o te HPMC i hangaia i Hebei he 80 mata. Ko te pai ake o te pai, ko te tikanga, ko te pai ake.

(3) Whakawhiti marama: hoatu te hydroxypropyl methylcellulose (HPMC) ki roto i te wai kia hanga he colloid maramara, ka titiro ki tana whakawhiti marama. Ko te nui o te whakawhiti marama, ko te pai ake, e tohu ana he iti ake nga insolubles kei roto. . I te nuinga o te wa he pai te uruhanga o nga reactors poutū, he kino ake te kino o nga reactors whakapae, engari ehara i te mea he pai ake te kounga o nga reactors poutū i te pai o nga reactors whakapae, a ka whakatauhia te kounga hua e te maha o nga mea.

(4) Te taumahatanga motuhake: Ko te nui ake o te taumahatanga motuhake, ko te taumaha ake ka pai ake. He nui te motuhake, te tikanga na te mea he tiketike te ihirangi o te roopu hydroxypropyl kei roto, he nui te ihirangi o te roopu hydroxypropyl, he pai ake te pupuri wai.