Ko te whakaurunga papaku, e whai waahi nui ana ki te whakapai ake i te mahi o te hanga moata whakauru maroke, neke atu i te 40% o te utu rauemi i roto i te moata whakaranu maroke.Ko te nuinga o nga whakaurunga i roto i te maakete o-whare ka tukuna e nga kaihanga o nga iwi ke, a ko te tohu tohutoro o nga hua ka tukuna ano e nga kaiwhakarato.He nui tonu te utu mo te hua moata whakaranu maroke, he uaua ki te whakanui i te masonry noa me te raima raima me te nui me te whānuitanga whanui.Ko nga hua o te maakete teitei e whakahaerehia ana e nga kamupene o waho, a, he iti nga hua o nga kaihanga kumete maroke me te kore utu o te utu;ko te tono whakaurunga karekau he rangahau nahanaha me te whai kiko, me te whai matapo i nga tikanga o tawahi.Anei, ko ta matou korero ki a koe, he aha te mahi o te hydroxypropyl methylcellulose i roto i nga whakaurunga noa o te moata whakauru maroke?
Ko te Hydroxypropyl methylcellulose he momo cellulose kua piki haere te whakaputa me te kai i nga tau tata nei.Ko te Hydroxypropyl methylcellulose he mea hanga mai i te miro parakore i muri i te maimoatanga whakamaaramatanga, ma te whakamahi i te propylene oxide me te methyl chloride hei kaihoko whakaetere, he cellulose kore-ionic i konatunatua etera i hangaia ma te raupapa tauhohenga.Ko te tohu o te whakakapinga ko te tikanga 1.2~2.0.He rereke ona ahuatanga i runga i te ōwehenga o te ihirangi methoxyl me te ihirangi hydroxypropyl.Ko nga ahuatanga o te hydroxypropyl methylcellulose e whai ake nei:
1. He ngawari te wairewa Hydroxypropyl methylcellulose i roto i te wai matao, a ka raru ki te rewa i te wai wera.Engari he tino teitei ake te pāmahana o te wai wera i tera o te methyl cellulose.Ko te memehatanga i roto i te wai matao ka tino pai ake ki te methyl cellulose.
2. Ko te pokey o te hydroxypropyl methylcellulose e pa ana ki tona taumaha ngota.Ko te nui ake o te taumaha ngota, ka teitei ake te viscosity.Ka pa ano te pamahana ki tona pokey, i te pikinga o te pāmahana, ka heke te pokey.Heoi, he iti ake te awe o tona pokey teitei me te pāmahana i to te methyl cellulose.He pūmau tana otinga ina penapena ki te pāmahana rūma.
3. Ko te pupuri wai o te hydroxypropyl methylcellulose e whakawhirinaki ana ki te nui o te taapiri, te pokey, me etahi atu, a ko te reiti pupuri wai i raro i te nui o te taapiri he nui ake i tera o te methyl cellulose.
4. Ko te Hydroxypropyl methylcellulose he pumau ki te waikawa me te kawakawa, a he tino pumau tona otinga wai i roto i te awhe o te pH = 2 ~ 12.He iti te awe o te houra me te wai kotakota ki te mahi, engari ka taea e te kawakore te tere ake i te memeha me te whakanui paku i tona pokey.Ko te Hydroxypropyl methylcellulose he pumau ki nga tote noa, engari ka nui te kukū o te wairewa tote, ka piki ake te pokey o te otinga hydroxypropyl methylcellulose.
5. Ka taea te whakauru i te Hydroxypropyl methylcellulose ki nga polymers wairewa-wai hei hanga i tetahi otinga pokey teitei ake.Pērā i te waipiro polyvinyl, te māngaro ether, te kāpia huawhenua, aha atu.
6. Ko te Hydroxypropyl methylcellulose he pai ake te aukati i te methylcellulose, a he iti ake te kaha o te whakahekenga enzymatic o tona otinga i tera o te methylcellulose.
7. Ko te piri o te hydroxypropyl methylcellulose ki te hanga kumete he teitei ake i tera o te methylcellulose.
Wā tuku: Mei-09-2023