Putty chigadziko chinoshandiswa zvakanyanya mukuvaka mapurojekiti ekushongedza, uye hunhu hwayo hunobata zvakananga hupenyu hwesevhisi uye yekushongedza mhedzisiro yekuputira madziro. Bonding simba uye mvura kuramba zviratidzo zvinokosha pakuongorora putty kushanda.Redispersible latex poda, se organic polymer yakagadziridzwa zvinhu, inoita basa rakakosha mukuvandudza mashandiro e putty.
1. Mechanism yekuitazve redispersible latex powder
Redispersible latex poda ihupfu inogadzirwa nekupfapfaidza kuomeswa kwepolymer emulsion. Inogona-emulsify kuumba yakagadzikana yepolymer dispersion system mushure mekusangana nemvura, iyo inoita basa mukusimudzira simba rekubatanidza uye kuchinjika kweputty. Mabasa ayo makuru anosanganisira:
Kuvandudza simba rekubatanidza: Redispersible latex poda inoumba firimu repolymer panguva yekuomeswa kweputty, uye inopindirana neinorganic gelling zvinhu kuvandudza kugona kwekubatana.
Kuvandudza kudzivirira kwemvura: Latex poda inoumba hydrophobic network mune putty chimiro, ichideredza kupinda kwemvura uye kuvandudza kudzivirira kwemvura.
Kuvandudza kuchinjika: Inogona kuderedza brittleness ye putty, kuvandudza deformation kugona, uye kuderedza njodzi yekutsemuka.
2. Chidzidzo chekuedza
Test zvinhu
Base zvinhu: simende-based putty poda
Redispersible latex poda: ethylene-vinyl acetate (EVA) copolymer latex poda.
Zvimwe zvinowedzera: thickener, mvura inochengetedza mumiriri, filler, nezvimwe.
Test method
Maputty ane akasiyana redispersible latex poda dosages (0%, 2%, 5%, 8%, 10%) akagadzirirwa zvakateerana, uye simba ravo rekubatanidza uye kuramba kwemvura kwakaedzwa. Kusimba kwechisungo kwakatemwa nebvunzo yekudhonza-kunze, uye bvunzo yekudzivirira mvura yakaongororwa nehuwandu hwekuchengetedza simba mushure mekunyudzwa mumvura kwemaawa makumi maviri nemana.
3. Migumisiro uye nhaurirano
Mhedzisiro yeredispersible latex poda pakusimba kwekubatanidza
Mhedzisiro yebvunzo inoratidza kuti nekuwedzera kweRDP dosi, iyo yekubatanidza simba re putty inoratidza maitiro ekutanga kuwedzera uye nekudzikamisa.
Kana iyo RDP dosage ikawedzera kubva pa0% kusvika 5%, iyo yekubatanidza simba reputty inovandudzwa zvakanyanya, nekuti iyo polymer firimu inoumbwa neRDP inosimudzira yekubatanidza simba pakati peiyo base zvinhu uye putty.
Ramba uchiwedzera RDP kusvika kupfuura 8%, kukura kwesimba rekubatanidza kunowanzove kwakapfava, uye kunyange kuderera zvishoma pa10%, izvo zvingave nekuti yakawandisa RDP ichakanganisa iyo yakasimba chimiro cheputty uye kuderedza iyo interface simba.
Mhedzisiro yeredispersible latex poda pakudzivirira mvura
Mhedzisiro yekuyedza yekudzivirira mvura inoratidza kuti huwandu hweRDP hune mhedzisiro yakakosha pakudzivirirwa kwemvura kweputty.
Simba rekubatanidza re putty pasina RDP rakadzikira zvakanyanya mushure mekunyura mumvura, zvichiratidza kushomeka kwemvura.
Kuwedzerwa kwehuwandu hwakakodzera hweRDP (5% -8%) kunoita kuti putty iite dense organic-inorganic composite chimiro, inovandudza kudzivirira kwemvura, uye inovandudza zvakanyanya chiyero chekuchengetedza simba mushure memaawa makumi maviri nemana ekunyudzwa.
Nekudaro, kana iyo RDP yemukati ichipfuura 8%, kuvandudzwa kwemvura inodzikira, izvo zvingave nekuti zvakawandisa organic zvikamu zvinoderedza anti-hydrolysis kugona kweputty.
Mhedziso dzinotevera dzinogona kutorwa kubva muongororo yekuyedza:
Nhamba yakakodzera yeredispersible latex poda(5% -8%) inogona kuvandudza zvakanyanya simba rekubatanidza uye kuramba kwemvura kweputty.
Kunyanya kushandiswa kweRDP (> 8%) kunogona kukanganisa chimiro chakasimba cheputty, zvichikonzera kudzikira kana kutoderera mukuvandudzwa kwesimba rekubatanidza uye kuramba mvura.
Iyo yakakwana dosage inoda kukwidziridzwa zvinoenderana neiyo chaiyo application mamiriro ekuisa kuti uwane yakanakisa chiyero pakati pekuita uye mutengo.
Nguva yekutumira: Mar-26-2025