Ko te ingoa Hainamana o te HPMC ko te hydroxypropyl methylcellulose. He kore-ionic, ā, he maha ngā wā e whakamahia ana hei pupuri wai i roto i te moata maroke-ranu. Koinei te rauemi pupuri wai e whakamahia whānuitia ana i roto i te moata. He hua ether i ahu mai i te polysaccharide i hangaia mā te alkaliization me te etherification. Kāore he utu, kāore e tauhohe ki ngā ion kua utua i roto i te rauemi whakapūkara, ā, he pumau te mahi. He iti ake hoki te utu i ētahi atu momo ether cellulose, nō reira he whānui te whakamahinga i roto i te moata maroke-ranu.
Te Mahi a te hydroxypropyl methylcellulose: Ka taea e ia te whakamātotoru i te moata hou kua whakaranua kia rite te matotoru mākū, ā, kia kore ai e wehewehe. (Te whakamātotoru) Ko te pupuri wai te āhuatanga tino nui, e āwhina ana ki te pupuri i te nui o te wai kore utu i roto i te moata, kia roa ake ai te wā o te rauemi sima ki te whakamakuku i muri i te hanganga o te moata. (Te pupuri wai) He āhuatanga ka taea te whakauru i te hau, ka taea te whakauru i ngā mirumiru hau ōrite me te pai hei whakapai ake i te hanganga o te moata.
Ko te teitei ake o te matotoru o te hydroxypropyl methylcellulose ether, ko te pai ake o te mahi pupuri wai. Mō te hua kotahi, he tino rerekē ngā hua matotoru i inehia mā ngā tikanga rerekē, ā, ko ētahi he ruarua ngā rerekētanga. Nō reira, ina whakatauritehia te matotoru, me whakahaere i waenga i ngā tikanga whakamātautau kotahi, tae atu ki te pāmahana, te rotor, me ētahi atu.
Mō te rahi o te matūriki, ko te angiangi o te matūriki, ko te pai ake o te pupuri wai. I muri i te pa atu o ngā matūriki nui o te cellulose ether ki te wai, ka rewa tonu te mata ka hanga he kirikiri hei takai i te rauemi hei aukati i ngā ngota wai kia kore e uru tonu. I ētahi wā, kāore e taea te horapa ōrite me te rewa ahakoa te roa o te whakaoho, ka hanga he wairewa pūngāwerewere, he whakakotahitanga rānei. He nui te pānga ki te pupuri wai o te cellulose ether, ā, ko te wairewatanga tētahi o ngā āhuatanga mō te whiriwhiri i te cellulose ether. Ko te angiangi he tohu mahi nui hoki o te methyl cellulose ether. Ko te MC e whakamahia ana mō te moata paura maroke me paura, he iti te ihirangi wai, ā, ko te angiangi me iti iho i te 63um te 20%-60% o te rahi o te matūriki. Ka pā te angiangi ki te wairewatanga o te hydroxypropyl methylcellulose ether. Ko te MC matotoru he kirikiri te nuinga o te wā, ā, he ngāwari ki te rewa ki te wai me te kore e whakakotahi, engari he tino puhoi te tere rewatanga, nō reira kāore e pai mō te whakamahi i roto i te moata paura maroke. I roto i te moata paura maroke, ka marara te MC ki waenga i ngā rauemi raima pēnei i te kirikiri, te whakakī pai me te sima, ā, ko te paura pai anake ka taea te karo i te kohikohinga o te methyl cellulose ether ina konatunatua ki te wai.
I te nuinga o te wā, ko te teitei ake o te matotoru, ko te pai ake o te pānga pupuri wai. Heoi, ko te teitei ake o te matotoru me te teitei ake o te taumaha ngota o te MC, ko te whakahekenga o tōna wairewa ka pā kino ki te kaha me te mahi hanga o te moata. Ko te teitei ake o te matotoru, ko te kitea ake o te pānga matotoru ki te moata, engari kāore i te ōrite tika. Ko te teitei ake o te matotoru, ko te matotoru ake o te moata mākū, arā, i te wā hanga, ka kitea he piri ki te waru me te piri nui ki te papa. Engari kāore e whai hua ki te whakanui ake i te kaha hanganga o te moata mākū tonu. Arā, i te wā hanga, kāore i te kitea te mahi ārai-totoka. I tetahi atu taha, ko ētahi matotoru reo me te iti engari he methyl cellulose ethers kua whakarerekētia he mahi tino pai ki te whakapai ake i te kaha hanganga o te moata mākū.
Ko te pupuri wai o te HPMC e pā ana hoki ki te pāmahana e whakamahia ana, ā, ka heke te pupuri wai o te methyl cellulose ether i te pikinga o te pāmahana. Heoi, i roto i te whakamahinga rauemi tūturu, he maha ngā wā ka whakamahia te moata paura maroke ki ngā papa wera i ngā pāmahana teitei (neke atu i te 40 nekehanga) i roto i ngā taiao maha, pērā i te paninga o te putty pakitara o waho i raro i te rā i te raumati, ka tere ake te whakamaroke o te sima me te whakapakeketanga o te moata paura maroke. Ko te hekenga o te tere pupuri wai ka puta te whakaaro mārama kei te pāngia te kaha mahi me te ātete pakaru, ā, he mea tino nui kia whakaitihia te awe o ngā āhuatanga pāmahana i raro i tēnei āhuatanga. I tēnei whakaaro, ko ngā tāpiringa methyl hydroxyethyl cellulose ether e kiia ana kei mua i te whanaketanga hangarau. Ahakoa kua piki ake te nui o te methyl hydroxyethyl cellulose (tātai raumati), kāore tonu te kaha mahi me te ātete pakaru e tutuki i ngā hiahia o te whakamahinga. Mā te maimoatanga motuhake ki te MC, pērā i te whakanui ake i te tohu o te etherification, me ētahi atu, ka taea te pupuri i te pānga pupuri wai i te pāmahana teitei ake, kia pai ake ai te mahi i raro i ngā āhuatanga uaua.
Ko te tikanga, he pāmahana tiēre te HPMC, ka taea te wehewehe ki ngā momo 60, momo 65, me te momo 75. Mō ngā umanga e whakamahi ana i te onepu awa mō te moata kua oti te whakaranu, he pai ake te whakamahi i te HPMC momo 75 me te pāmahana tiēre teitei. Kaua te horopeta o te HPMC e tino teitei, ki te kore ka nui ake te hiahia wai mō te moata, ka piri ki te kokoru, ā, ka roa rawa te wā whakatakoto, ka pā ki te hanganga. Ka whakamahia e ngā hua moata rerekē te HPMC me ngā matotoru rerekē, ā, kāore e whakamahia noatia te HPMC matotoru teitei. Nō reira, ahakoa he pai ngā hua hydroxypropyl methylcellulose, ka mihia rātou ina whakamahia pai. Ko te whiriwhiri i te HPMC tika te kawenga matua a ngā kaimahi taiwhanga umanga.
Wā tuku: Paenga-whāwhā-12-2023