Upfu hweputty hunonyanya kushandiswa pakuenzanisa nekugadzirisa madziro panguva yekuvaka. Zvisinei, upfu hweputty hwechinyakare hunowanzo nyungudika uye kupfava kana hukaiswa mumvura, zvichikanganisa kunaka kwekuvaka uye hupenyu hwebasa rechivako. Hydroxypropyl methylcellulose (HPMC), sechinhu chakakosha chinowedzera, chinogona kuvandudza zvakanyanya kuramba kweputty powder mumvura.
1. Hunhu hwemakemikari uye mabasa ekutanga eHPMC
Hydroxypropyl methylcellulose (HPMC) imhando ye cellulose ether isina ionic ine mabasa akasiyana-siyana akadai sekukora, kugadzira firimu, kugadzikana, uye kunyorovesa. Inoshandiswa zvakanyanya muzvinhu zvekuvaka, mishonga, chikafu nedzimwe nzvimbo. Maumbirwo eHPMC ane mahydrophilic hydroxyl groups (–OH) uye hydrophobic hydrocarbon groups (–CH3, –CH2–), zvichiita kuti inyungudike zvakanaka mumvura uye igadzikane. Hunhu uhwu hunoita kuti HPMC igadzire mhinduro dzakagadzikana dzecolloidal mumvura uye igadzire chimiro chakasimba chenetwork panguva yekupisa, nokudaro ichivandudza hunhu hwezvinhu.
2. Nzira yekuvandudza kudziviswa kwemvura
2.1. Mhedzisiro yekukora
HPMC inogona kuwedzera zvakanyanya kusimba kweputty powder slurry, zvichiita kuti slurry igadzire sisitimu yekumisikidza yakadzikama mumvura. Kune rumwe rutivi, kusimba uku kunovandudza mashandiro ekuvaka kweslurry uye kunoderedza chiitiko chekubvisa slurry uye kubuda ropa; kune rumwe rutivi, nekugadzira slurry ine viscous, HPMC inoderedza mwero wekupinda kwemamorekuru emvura, nokudaro ichivandudza kushanda kweputty powder. Kusagadzikana kwemvura mushure mekupora.
2.2. Hunhu hwekugadzira mafirimu
Munguva yekugayiwa kweputty powder, HPMC inoumba firimu rakakora pakati pesimende, mvura nezvimwe zvinoshandiswa. Kamudzira aka kane mwero wepasi wemvura uye kanogona kudzivirira kupinda kwehunyoro. Firimu rinogadzirwa neHPMC rinogonawo kuvandudza simba remuchina uye kuramba kupfeka kwechinhu chacho, zvichiwedzera kuramba mvura kweputty powder.
2.3. Kuvandudza kusimba kwekuputika
Nekuvandudza elastic modulus uye shrinkage properties ye putty powder, HPMC inogona kuderedza zvinobudirira njodzi yekutsemuka kunokonzerwa nekutsemuka kwakaoma uye kuchinja kwetembiricha. Kuderedza kuitika kwekutsemuka kuchabatsirawo kuvandudza kudzivirira mvura kwe putty powder, nekuti tsvina dzichava nzira huru yekupinda kwemvura.
2.4. Kudzora kunyorova kwemvura mumuviri
HPMC inogona kunonotsa mwero wekuita kwemvura nesimende, zvichiita kuti putty powder ive nenguva yakareba yekuzviporesa uye kuwedzera simba panguva yekuoma kwayo. Kunonoka kwemvura kunobatsira kugadzira microstructure yakakora, nokudaro zvichideredza maburi eputty powder uye kunatsiridza kushanda kwemvura kwechinhu chacho.
3. Kushandiswa kweHPMC muupfu hweputty
3.1. Kuvandudza mashandiro ekuvaka
HPMC inovandudza hunhu hwe rheological hwe putty slurry, zvichiita kuti zvive nyore kune vashandi vekuvaka kuita mabasa ekukwenya nekutsvedzerera. Nekuda kwekukora kwayo kwakanaka uye hunhu hwekuchengetedza mvura, putty powder inogona kuchengetedza hunyoro hwakakodzera kana ikashandiswa, zvichideredza kuwanda kwemavanga akaoma uye kuvandudza kunaka kwekuvaka.
3.2. Kuvandudza hunhu hwemakanika ezvigadzirwa zvakapedzwa
Upfu hweputty hunowedzerwa neHPMC hune simba guru rekushandisa uye hunonamatira mushure mekupora, zvichideredza mukana wekutsemuka nekubviswa kweganda. Izvi zvinovandudza zvikuru runako rwese uye kugara kwenguva refu kwechivako.
3.3. Kuvandudza kuramba kwemvura kwependi yekupedzisira
Ongororo dzinoratidza kuti simba reputty powder inowedzerwa neHPMC inoderera zvishoma mushure mekunyikwa mumvura, uye inoratidza kuramba kuri nani kwehydrolysis uye kugadzikana. Izvi zvinoita kuti putty powder inoshandisa HPMC ive yakakodzera zvinodiwa pakuvaka munzvimbo dzine hunyoro.
4. Nzira dzekudzivirira pakushandisa
Kunyangwe HPMC iine simba guru pakuvandudza kusapindirana kwemvura kweputty powder, zvinhu zvinotevera zvinofanira kucherechedzwa pakushandisa kwayo:
4.1. Sarudza mushonga wakakodzera
Chiyero cheHPMC chinofanira kugadziriswa zvine mwero zvichienderana nefomula uye zvinodiwa pakuvaka kweputty powder. Kushandiswa zvakanyanya kunogona kukonzera kuti slurry ive yakanyanya kusviba, zvichikanganisa mashandiro ekuvaka; kusashandiswa zvakakwana kunogona kusaita kuti iite kukora kwayo uye kugadzira firimu.
4.2. Kushanda pamwe chete nezvimwe zvinowedzerwa
HPMC inowanzoshandiswa pamwe chete nedzimwe cellulose ethers, latex powder, plasticizers nezvimwe zvinowedzera kuti pave nemigumisiro yakanaka. Kusarudza nekufananidza zvinowedzerwa izvi kunogona kuwedzera mashandiro eputty powder.
4.3. Dzora tembiricha yemhepo uye hunyoro
Hunhu hweHPMC hwekuchengetedza mvura hunogona kukanganiswa kana hukashandiswa munzvimbo dzinopisa zvakanyanya kana dzine hunyoro hushoma. Kuvaka kunofanirwa kuitwa mumamiriro ekupisa nehunyoro hwakakodzera zvakanyanya sezvinobvira, uye kutarisisa kunofanira kupihwa kuchengetedza hunyoro hwemvura.
HPMC inonyatso vandudza kudzivirira kweputty powder kuburikidza nenzira dzakasiyana-siyana dzakadai sekukora, kuumbwa kwefirimu, kuvandudza kudzivirira kutsemuka uye kudzora hydration reaction, zvichiita kuti iratidze kugadzikana kwakanaka uye kugara kwenguva refu munzvimbo dzine hunyoro. Izvi hazvingobatsiri chete kunaka uye kushanda zvakanaka kwekuvaka chivako, asiwo zvinowedzera hupenyu hwebasa rechivako. Mukushandiswa kwakakodzera, kusarudza nekushandisa HPMC nezvimwe zvinowedzera zvinogona kuwedzera kushanda kweputty powder uye kuwana mhedzisiro yekuvaka yepamusoro.
Nguva yekutumira: Chikumi-26-2024