I roto i nga tau tata nei, me te whanaketanga tonu o te hangarau whakawera waiariki taiepa waho, te ahunga whakamua tonu o hydroxypropyl methyl cellulose production hangarau, me nga āhuatanga pai o te hydroxypropyl methyl cellulose HPMC ake, hydroxypropyl methyl cellulose HPMC kua whakamahia whānuitia i roto i te ahumahi hanga.
wa whakarite
Ko te wa whakarite o te raima ko te nuinga o te waa e pa ana ki te waahi o te raima, a he iti te awe o te kohinga.Na reira, ka taea te whakamahi i te wa whakatakoto o te kumete hei whakakapi i te rangahau mo te awe o te HPMC ki te wa whakatuu o te ranunga raima kore marara i raro i te wai.Mai i te wa o te whakatakotoranga o te kumete e pa ana ki te tauwehenga ciment wai me te tauwehenga kirikiri ciment, kia taea ai te arotake i te awe o te HPMC i runga i te wa waahi o te moata, he mea tika ki te whakatika i te tauwehenga ciment wai me te tauwehenga kirikiri kirikiri o te moata.
Ko te tauhohenga whakamatautau e whakaatu ana ko te taapiri o te HPMC he paheketanga ki runga i te ranunga moata, a ka piki ake te wa whakatakoto o te kumete ki te piki o te nui o te HPMC cellulose ether.He rite tonu te nui o te HPMC, he roa ake te wa whakatakoto o te kumete i hanga i raro i te wai i tera i hanga ki te hau.Ina ine i roto i te wai, ko te 6~18h i muri mai o te kumete i konatunatua ki te HPMC me te 6~22h i muri mai i te waahi whakamutunga atu i tera o te tauira kore.Na reira, me whakamahi tahi te HPMC me te kaihoko kaha moata.
He polymer te HPMC me te hanganga raina macromolecular, me nga roopu hydroxyl i runga i nga roopu mahi, ka taea te hanga i nga here hauwai me te whakaranu i nga ngota ngota wai hei whakanui ake i te pokey o te whakaranu wai.Ko nga mekameka ngota roa o te HPMC ka kukume tetahi ki tetahi, ka hono nga ngota ngota HPMC ki te hanga i te hanganga whatunga, me te takai sima me te whakaranu wai.I te mea ka hangahia e te HPMC he hanganga whatunga e rite ana ki te kiriata me te takai i te sima, ka taea e ia te aukati i te paheketanga o te wai i roto i te kumete me te aukati, te whakaheke ranei i te tere o te whakamakuku sima.
Te whakaheke toto
Ko te ahua o te toto o te kumete he rite ki tera o te raima, ka nui te whakatau o nga whakahiato, ka piki ake te ōwehenga sima wai o te slurry paparanga o runga, ka nui te whakaheke kirihou o te paparanga o runga, ka pakaru ranei i te wa tuatahi, me te kaha o te mata slurry he ahua ngoikore.
Ka nui ake te horopeta i te 0.5%, karekau he toto.Ko tenei na te mea ka whakauruhia te HPMC ki te kumete, he hanga kiriata me te hanganga reticular a HPMC, me te whakauru o te hydroxyl i runga i te mekameka roa o te macromolecule, e hanga ana i te sima me te whakaranu i te wai i roto i te kumete puka moata, te whakarite i te hanganga pumau o te. moata.Ina whakauruhia te HPMC ki te kumete, he maha nga mirumiru iti motuhake ka puta.Ka tohatohahia enei mirumiru ki roto i te kumete, ka aukati i te tukunga o nga kohinga.Ko tenei mahinga hangarau a HPMC he nui te paanga ki runga i nga taonga raima, he maha nga wa e whakamahia ana ki te whakarite i nga waahanga hou o te raima penei i te moata maroke me te paru polymer, kia pai ai te pupuri i te wai me te kirihou.
Te hiahia wai mo te kumete
Ina he iti rawa te nui o te HPMC, he nui te awe ki te tono wai mo te kumete.I raro i te tikanga he rite tonu te roha o te kumete hou, ko te nui o te HPMC me te tono wai mo te kumete ka huri i roto i tetahi waa, ka heke te tono wai mo te kumete i te tuatahi ka piki ake.A, no te iti iho i te 0.025% te ihirangi HPMC, me te piki ake o te ihirangi HPMC, ka heke te hiahia o te wai o te moata i raro i te tohu roha kotahi, e whakaatu ana ko te iti ake o te ihirangi HPMC, ko te wai whakaheke i te paanga o te moata.Ko te awe o te hau o te HPMC he maha nga mirumiru iti motuhake o te moata, e whai waahi ana ki te whakahinuhinu me te whakapai ake i te rere o te kumete.Mena he nui ake te inenga i te 0.025%, ka piki ake te tono wai o te kumete ki te piki o te inenga, na te tika tonu o te hanganga whatunga o HPMC, te poto o te aputa i waenga i nga flocs i runga i te mekameka ngota roa, te kukume me te whakakotahitanga, me te whakahekenga o te rere o te kumete.No reira, ina he rite tonu te tohu roha, ka whakaatu te slurry i te pikinga o te hiahia wai.
Te wa tuku: Noema-25-2022