Hydroxypropyl methylcellulose, inonzi: HPMC kana MHPC. Chitarisiko chayo ihupfu huchena kana husina kuchena; kushandiswa kukuru ndeyekuparadzanisa mukugadzirwa kwepolyvinyl chloride, uye ndiyo inonyanya kubatsira pakugadzirira PVC ne suspension polymerization. Mukuvaka kweindasitiri yekuvaka, inonyanya kushandiswa mukuvaka nemashini senge kuvaka madziro, kupurasita, kuvharira, nezvimwewo; kunyanya mukuvaka kwekushongedza, inoshandiswa kunama mataira eceramic, marble, uye purasitiki. Ine simba rakawanda rekubatanidza uye inogona kuderedza huwandu hwesimende. . Inoshandiswa sechinhu chinosimbisa muindasitiri yekupenda, chinogona kuita kuti layer ive yakajeka uye yakapfava, kudzivirira kubviswa kwehupfu, kuvandudza mashandiro ekuyera, nezvimwewo.
Mu cement mortar ne gypsum-based slurry, hydroxypropyl methylcellulose inonyanya kuita basa rekuchengetedza mvura nekuikora, izvo zvinogona kuvandudza simba rekubatana uye kuramba kudonha kwe slurry.
Zvinhu zvakaita sekupisa kwemhepo, tembiricha uye kumhanya kwekumanikidzwa nemhepo zvinokanganisa mwero wekushanduka kwemvura mumota yesimende nezvigadzirwa zvakagadzirwa negypsum. Nokudaro, mumwaka yakasiyana, pane misiyano mumhedzisiro yekuchengetedza mvura yezvigadzirwa zvine huwandu hwakaenzana hwehydroxypropyl methylcellulose.
Mukugadzirwa kwacho, mhedzisiro yekuchengetedza mvura yeslurry inogona kugadziriswa nekuwedzera kana kuderedza huwandu hweHPMC inowedzerwa. Kuchengetwa kwemvura kwemethyl cellulose ether pasi pemamiriro ekupisa kwakanyanya chiratidzo chakakosha chekusiyanisa mhando yemethyl cellulose ether.
Zvigadzirwa zvakanaka zve hydroxypropyl methylcellulose series zvinogona kugadzirisa dambudziko rekuchengetedza mvura pasi pekupisa kwakanyanya. Munguva dzekupisa kwakanyanya, kunyanya munzvimbo dzinopisa uye dzakaoma uye dzakatetepa padivi rezuva, HPMC yepamusoro inodiwa kuti ivandudze kuchengetedza mvura mu slurry.
HPMC yemhando yepamusoro ine hunhu hwakanaka kwazvo. Mapoka ayo emethoxy nehydroxypropoxy akapararira zvakaenzana pamwe chete ne cellulose molecular chain, izvo zvinogona kuvandudza kugona kwemaatomu eokisijeni ari pa hydroxyl ne ether bonds kubatana nemvura kugadzira hydrogen bonds. , kuitira kuti mvura yakasununguka ibatane nemvura, kuitira kuti ikwanise kudzora kubuda kwemvura kunokonzerwa nemamiriro ekunze anopisa, uye kuwana mvura yakawanda inochengetwa.
Mvura inodiwa kuti zvinhu zvinosimbisa simende zvigadzike semasitemu negypsum zvisaparare. Huwandu hwakakodzera hweHPMC hunogona kuchengetedza hunyoro mumota kwenguva yakareba kuitira kuti kuomesa nekuomesa zvirambe zvichienderera mberi.
Huwandu hweHPMC hunodiwa kuti mvura irambe yakachengetwa hunoenderana ne:
1. Kunyudzwa kwechikamu chepasi
2. Kuumbwa kwedhaka
3. Ukobvu hwedhaka
4. Kudiwa kwemvura yedhaka
5. Nguva yekuiswa kwejelling zvinhu
Hydroxypropyl methylcellulose yemhando yepamusoro inogona kuparadzirwa zvakaenzana uye zvinobudirira mumota yesimende uye zvigadzirwa zvakagadzirwa negypsum, uye inoputira zvidimbu zvese zvakasimba, uye inoumba firimu rinonyorovesa, uye hunyoro huri pasi hunoburitswa zvishoma nezvishoma kwenguva yakareba, uye hydration reaction ne inorganic gelling material kuve nechokwadi chekuti chinhu chacho chinosimba uye simba rekumanikidza.
Saka, mukuvaka kwezhizha kunodziya zvakanyanya, kuti mvura irambe ichichengetwa zvakanaka, zvakakosha kuwedzera zvigadzirwa zveHPMC zvemhando yepamusoro muhuwandu hwakakwana zvichienderana nefomura, zvikasadaro, pachava nekushaikwa kwemvura yakakwana, simba shoma, kutsemuka, kuvharika uye kudonha kwemvura kunokonzerwa nematambudziko ekuoma zvakanyanya, asiwo kuwedzera kuoma kwevashandi pakuvaka. Sezvo tembiricha ichidzikira, huwandu hwemvura inowedzerwa neHPMC hunogona kudzikiswa zvishoma nezvishoma, uye mhedzisiro imwechete yekuchengetedza mvura inogona kuwanikwa.
Nguva yekutumira: Ndira-16-2023