1. He aha te kaupapa matua o te hydroxypropyl methyl cellulose (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 tohu hauora e ai ki tana kaupapa.I tenei wa, ko te nuinga o nga hua o te kaainga he reanga 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 hydroxypropyl methyl cellulose (HPMC).He aha te rereketanga o o raatau whakamahinga?
Ka taea te wehewehea te HPMC ki te momo tere me te momo wera-rewa.Ko nga momo momo hua ka tere marara ki te wai matao ka ngaro ki te wai.I tenei wa, karekau he viscosity o te wai, no te mea ka marara noa te 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 te hua wera-rewa, ka tutaki ki te wai matao, ka tere te marara i roto i te wai wera ka ngaro i roto i te wai wera.Ka heke te pāmahana ki tetahi pāmahana, ka ata puta te pokey tae noa ki te hanganga o 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 pupū ake ka kore 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.Karekau he whakapae.
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 whakamararatia te HPMC ki roto i te wai wera i te timatanga, ka tere te memeha i te wa whakamatao.E rua nga tikanga angamaheni e whakaahuatia ana e whai ake nei:
1).Tuhia he 1/3, 2/3 ranei o te nui o te wai e hiahiatia ana ki roto i te ipu ka whakamahana ki te 70°C.whakamararatia te HPMC hei whakarite i te wai wera;ka tāpirihia te toenga o te wai matao ki te wai wera I roto i te slurry, whakamataohia te ranunga i muri i te whakaoho.
Tikanga whakaranu paura: Whakaranuhia te paura HPMC me te maha o etahi atu mea paura, uru pai ki te whakaranu, katahi ka tapirihia he wai kia memeha, katahi ka taea te rewa te HPMC i tenei wa kaore e kopikopiko me te whakahiato, no te mea ko ia kokonga iti, he iti noa iho. o HPMC Ka rewa tonu te paura ina tutaki ki te wai.-Ka whakamahia e nga kaihanga paura putty me te moata tenei tikanga.[Hydroxypropyl methyl cellulose (HPMC) e whakamahia ana hei whakakaha me te pupuri wai i roto i te kumete paura putty.
Kuhua te nui o te wai wera ki roto i te ipu ka whakamahana ki te 70°C.Taapirihia te hydroxypropyl methylcellulose me te whakaoho puhoi, timata te HPMC ki runga i te mata o te wai, katahi ka hanga he slurry, ka whakamatao i te slurry me te whakaoho.
Wā tuku: Nov-16-2021