Ko te Hydroxypropyl methylcellulose (HPMC) he ether cellulose kore-ionic i hangaia mai i te rauemi polymer tūturu cellulose mā roto i te raupapa o ngā tukanga matū. He paura ma, kāore he kakara, kāore he reka, kāore hoki he paitini, ka pupuhi hei wairewa colloidal mārama, paku kapua rānei i roto i te wai matao. He āhuatanga whakamātotoru, here, horapa, whakaemulsifying, hanga kiriata, whakatārewatanga, mimiti, whakapūmau, hohe mata, pupuri makuku me te tiaki colloid. Ka taea te whakamahi i te Hydroxypropyl methyl cellulose me te methyl cellulose ki ngā rauemi hanga, te ahumahi peita, te kapia hangai, te ahumahi uku, te rongoā, te kai, te kakahu, te ahuwhenua, te matū o ia rā me ētahi atu ahumahi.
Te pānga pupuri wai me te kaupapa o te hydroxypropyl methylcellulose HPMC
Ko te nuinga o te mahi a te cellulose ether HPMC ko te pupuri wai me te whakamātotoru i roto i te moata sima me te paru gypsum-based, ā, ka taea te whakapai ake i te kaha piri me te ātete totoro o te paru.
Ka pāngia te tere o te mimiti o te wai i roto i te moata sima me ngā hua e ahu mai ana i te gypsum e ngā āhuatanga pēnei i te pāmahana hau me te tere o te pēhanga. Nō reira, i ngā wā rerekē, he rerekētanga kei roto i te pānga pupuri wai o ngā hua me te nui o te HPMC i tāpirihia. I roto i te hanganga motuhake, ka taea te whakarite i te pānga pupuri wai o te paru mā te whakanui ake, te whakaiti rānei i te nui o te HPMC i tāpirihia. Ko te pupuri wai o te methyl cellulose ether i raro i ngā āhuatanga pāmahana teitei he tohu nui hei wehewehe i te kounga o te methyl cellulose ether. Ka taea e ngā hua raupapa HPMC pai te whakaoti rapanga o te pupuri wai i raro i te pāmahana teitei. I ngā wā pāmahana teitei, inā koa i ngā wāhi wera me te maroke me te hanganga paparanga angiangi i te taha paki, me whakamahi HPMC kounga teitei hei whakapai ake i te pupuri wai o te paru. He tino pai te ōritetanga o te HPMC kounga teitei. Ko ōna rōpū methoxy me te hydroxypropoxy he ōrite te tohatoha i te mekameka ngota cellulose, ka taea te whakapai ake i te kaha o ngā ngota hāora i runga i ngā hononga hydroxyl me te ether ki te hono atu ki te wai ki te hanga hononga hauwai. , kia noho ai te wai kore utu hei wai here, kia pai ai te whakahaere i te mimiti o te wai i puta mai i te pāmahana tiketike, kia mau ai te wai.
Ka taea te whakamarara ōrite me te whai hua i te HPMC cellulose kounga teitei ki roto i te moata sima me ngā hua e ahu mai ana i te gypsum, ka takai i ngā matūriki totoka katoa, ka hanga he kiriata mākū, ka tukuna mārire te makuku i roto i te turanga mō te wā roa, ā, mā te tauhohenga whakamakuku o te rauemi kua whakapūmautia ka whakarite i te kaha here me te kaha pēhi o te rauemi. Nō reira, i roto i te hanganga raumati pāmahana teitei, kia tutuki ai te pānga pupuri wai, me tāpirihia ngā hua HPMC kounga teitei ki ngā rahinga e tika ana kia rite ki te tauira, ki te kore, ka kore e ranea te whakamakuku, ka heke te kaha, ka pakaru, ka pakaru me te maturuturu nā te maroke nui. Ka piki ake hoki te uauatanga o te hanganga o ngā kaimahi. I te hekenga o te pāmahana, ka taea te whakaiti mārire i te nui o te wai HPMC i tāpirihia, ā, ka taea te whakatutuki i te pānga pupuri wai.
Ko te pupuri wai o te hua HPMC hydroxypropyl methylcellulose ka pāngia e ēnei āhuatanga:
He ōrite te tauhohenga o te HPMC, te methoxyl me te hydroxypropoxyl, ā, he teitei te tere pupuri wai;
He tiketike te pāmahana wai wera o te cellulose ether HPMC, he tiketike te tere pupuri wai; ki te kore, he iti te tere pupuri wai;
Ina piki ake te matotoru o te cellulose ether HPMC, ka piki ake hoki te tere pupuri wai; ina tae te matotoru ki tētahi taumata, ka ngawari te pikinga o te tere pupuri wai;
Ka nui ake te nui o te cellulose ether HPMC e tāpirihia ana, ka teitei ake te tere pupuri wai, ā, ka pai ake te pānga pupuri wai. I roto i te awhe o te tāpiri 0.25-0.6%, ka tere te piki o te tere pupuri wai me te pikinga o te nui tāpiri; ina piki ake te nui tāpiri, ka puhoi te ia o te pikinga o te tere pupuri wai.
Wā tuku: Pipiri-01-2023