Hydroxypropyl methylcellulose, inonzi: HPMC kana MHPC.Chitarisiko chichena kana chisina-chena poda;iyo inonyanya kushandiswa ndeyekuparadzira mukugadzirwa kwepolyvinyl chloride, uye ndiyo inonyanya kubatsira mumiriri wekugadzirira kwePVC nekumisa polymerization.Mukuita kwekuvaka kweindasitiri yekuvaka, inonyanya kushandiswa mukuvaka mechan sekuvaka madziro, plastering, caulking, nezvimwe;kunyanya mukuvaka kwekushongedza, inoshandiswa kunama mataira eceramic, marble, uye kushongedza kwepurasitiki.Iine simba guru rekubatanidza uye inogona kuderedza kuwanda kwesamende..Iyo inoshandiswa seyakakora muindasitiri yependi, iyo inogona kuita kuti dhizaini rive rakajeka uye rakapfava, kudzivirira kubviswa kwehupfu, kunatsiridza mashandiro anoita, nezvimwe.
Mune simende dhaka uye gypsum-based slurry, hydroxypropyl methylcellulose inonyanya kutamba basa rekuchengetedza mvura uye kukora, iyo inogona kunyatso kuvandudza simba rakabatana uye sag kuramba kweslurry.
Zvinhu zvakadai semhepo tembiricha, tembiricha uye kumhanya kwemhepo zvinokanganisa huwandu hwekuvhuvhuta kwemvura mumatope esimende uye zvigadzirwa zvegypsum.Naizvozvo, mumwaka wakasiyana, kune mimwe misiyano mukuchengetedza kwemvura mhedzisiro yezvigadzirwa zvine huwandu hwakafanana hwehydroxypropyl methylcellulose yakawedzerwa.
Mukuvaka chaiko, iyo yekuchengeta mvura mhedzisiro yeslurry inogona kugadziriswa nekuwedzera kana kudzikisa huwandu hweHPMC hwakawedzerwa.Kuchengetwa kwemvura kwemethyl cellulose ether pasi pemamiriro ekushisa kwakanyanya chiratidzo chakakosha chekusiyanisa kunaka kwemethyl cellulose ether.
Yakanakisa hydroxypropyl methylcellulose akatevedzana zvigadzirwa zvinogona kunyatsogadzirisa dambudziko rekuchengetedza mvura pasi pekupisa kwakanyanya.Mumwaka wekushisa kwakanyanya, kunyanya munzvimbo dzinopisa uye dzakaoma uye dzakatetepa-layer kuvakwa padivi rezuva, yemhando yepamusoro HPMC inodiwa kuvandudza kuchengetwa kwemvura kweslurry.
Yepamusoro-mhando HPMC ine yakanaka kwazvo yakafanana.Mapoka ayo methoxy uye hydroxypropoxy akagoverwa zvakaenzana pamwe chete ne cellulose molecular chain, iyo inogona kuvandudza kugona kwemaatomu eokisijeni pa hydroxyl uye ether bond kuti abatanidze nemvura kuti vagadzire ma hydrogen bond., kuitira kuti mvura yakasununguka ive yakasungwa mvura, kuitira kuti ibudirire kudzora kubuda kwemvura kunokonzerwa nekupisa kwekushisa kwemamiriro okunze, uye kuwana mvura yakakwirira yekuchengetedza.
Mvura inodiwa pakuita hydration kuitira kuisa simende zvinhu zvakaita semendi negypsum.Huwandu hwakakodzera hweHPMC hunogona kuchengetedza hunyoro mudhaka kwenguva yakareba yakakwana kuitira kuti kugadzika uye kuomesa maitiro kuenderere mberi.
Huwandu hweHPMC hunodiwa kuwana mvura yekuchengetedza yakakwana hunoenderana ne:
1. The absorbency of the base layer
2. Kuumbwa kwedhaka
3. Motar layer ukobvu
4. Mvura inoda dhaka
5. Nguva yekugadzika kweiyo gelling material
Yepamusoro-mhando hydroxypropyl methylcellulose inogona kuparadzirwa zvakafanana uye zvinobudirira kuparadzirwa musimende dhaka uye gypsum-based zvigadzirwa, uye kuputira zvese zvakasimba zvimedu, uye kugadzira firimu rekunyorova, uye hunyoro huri mujinga hunoburitswa zvishoma nezvishoma kwenguva yakareba, uye hydration reaction neiyo inorganic gelling zvinhu kuti ive nechokwadi chekubatana kwesimba uye kumanikidza kusimba kwechinhu.
Naizvozvo, mukupisa kwekupisa kwezhizha kuvakwa, kuti uwane iyo yekuchengeta mvura, zvinodikanwa kuti uwedzere emhando yepamusoro zvigadzirwa zveHPMC muhuwandu hwakakwana maererano neformula, zvikasadaro, pachave nekusakwana hydration, kuderedzwa simba, kuputika, kuputika. uye kudurura kunokonzerwa nekuomeswa zvakanyanya.matambudziko, asiwo kuwedzera kuoma kwekuvaka kwevashandi.Sezvo tembiricha inodonha, huwandu hwemvura HPMC hwakawedzerwa hunogona kuderedzwa zvishoma nezvishoma, uye iyo yakafanana yekuchengetedza mvura inogona kuwanikwa.
Nguva yekutumira: Jan-16-2023