Redispersible polymer poda (RDPs) inoita basa rakakosha mumaindasitiri akasiyana, kusanganisira kuvaka, zvinonamira, uye machira. Aya mapoda anoshandiswa zvakanyanya kuvandudza zvimiro zvecementitious zvinhu, kuwedzera kunamatira, kuchinjika, uye kusimba. Kunzwisisa maitiro ekugadzira eRDPs kwakakosha kuti vagadziri vaone zvigadzirwa zvemhando yepamusoro.
Raw Materials :
Kugadzirwa kweadhispersible polymer poda kunotanga nekunyatso kusarudza zvigadzirwa zvinopesvedzera zvimiro zvechigadzirwa chekupedzisira. Izvo zvakakosha zvinosanganisira polymer resins, inodzivirira colloids, plasticizers, uye akasiyana ekuwedzera.
Polymer Resins: Ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), uye acrylic polymers anowanzoshandiswa semahombe epolymer resins. Aya ma resin anopa kunamatira, kuchinjika, uye kuramba kwemvura kune iyo RDPs.
Dziviriro Colloids: Hydrophilic inodzivirira colloids senge polyvinyl doro (PVA) kana cellulose ethers inowedzerwa kudzikamisa iyo polymer particles panguva yekuomesa uye kuchengetedza, kudzivirira kuunganidzwa.
Plasticizers: Plasticizers inovandudza kushanduka uye kushanda kweRDPs. Mapurasitiki akajairika anosanganisira glycol ethers kana polyethylene glycols.
Additives: Zvakasiyana-siyana zvekuwedzera senge dispersants, thickeners, uye cross-linking agents zvinogona kuiswa kuti zviwedzere zvinhu zvakadai se dispersibility, rheology, kana simba remagetsi.
Processing Techniques :
Kugadzirwa kweadhispersible polymer poda kunosanganisira akati wandei akaomarara ekugadzirisa matanho, anosanganisira emulsion polymerization, pfapfaidzo kuomesa, uye mushure mekurapa maitiro.
Emulsion polymerization:
Maitiro acho anotanga ne emulsion polymerization, uko monomers, mvura, emulsifiers, uye ekutanga zvinosanganiswa mune reactor pasi pekudzora mamiriro ekushisa nekumanikidza. Mamonomers anopolymesa kuita latex particles akaparadzirwa mumvura. Sarudzo yemamonomers uye maitiro ekuita anosarudza iyo polymer kuumbwa uye zvivakwa.
Kudzikamisa uye Coagulation:
Mushure me polymerization, iyo latex inodzikamiswa nekuwedzera inodzivirira colloids uye stabilizers. Iyi nhanho inodzivirira particle coagulation uye inovimbisa kugadzikana kwe latex dispersion. Coagulation agents anogona kuunzwa kuti akonzere kudzorwa kubatanidzwa kwelatex particles, kuumba yakagadzikana coagulum.
Spray Drying:
Iyo yakagadzikana latex dispersion inobva yadyiswa muspray dryer. Mukamuri yekupfapfaidza yekupfapfaidza, kupararira kunoitwa atomu kuita madonhwe madiki uchishandisa yakakwirira-kudzvanywa nozzles. Mhepo inopisa inounzwa panguva imwe chete kuti ibudise mvura, ichisiya zvimedu zvepolymer zvakasimba. Mamiriro ekuomeswa, anosanganisira tembiricha yemhepo inopinza, nguva yekugara, uye mwero wekuyerera kwemhepo, zvinokanganisa particle morphology uye hupfu.
Mushure mekurapwa:
Kutevera kuomeswa kwepfapfaidzo, iyo inokonzeresa yepolymer poda inopinda mushure mekurapa maitiro ekuvandudza mashandiro ayo uye kugadzikana kwekuchengetedza. Aya maitiro anogona kusanganisira kugadziriswa kwepamusoro, granulation, uye kurongedza.
a. Surface Kugadziridzwa: Surface-inoshanda maajenti kana muchinjika-anobatanidza maajenti anogona kushandiswa kugadzirisa epamusoro zvimiro zvepolymer zvimedu, kuwedzera kupararira kwavo uye kuenderana nezvimwe zvinhu.
b. Granulation: Kuvandudza mabatiro uye dispersibility, iyo polima poda inogona kuita granulation kuti ibudise yunifomu particle size uye kuderedza kuumbwa kweguruva.
c. Packaging: Iwo ekupedzisira maRDP akaiswa mumidziyo inodzivirira hunyoro kudzivirira kunyura uye kuchengetedza kugadzikana kwavo panguva yekuchengetedza nekufambisa.
Hunhu Kudzora Matanho:
Kudzora kwemhando kwakakosha mukati memaitiro ese ekugadzira kuti ive nechokwadi chekuenderana uye kuvimbika mune zvivakwa zvezve dispersible polymer poda. Anoverengeka akakosha paramita anotariswa uye anodzorwa pamatanho akasiyana:
Raw Material Hunhu: Kunyatsoongorora uye kuyedzwa kwezvinhu, zvinosanganisira mapolymer, colloids, uye zvekuwedzera, zvinoitiswa kuti zvionekwe hunhu hwazvo, kuchena, uye kuenderana nekwakagadzirirwa kushandiswa.
Maitiro Ekutarisa: Yakakosha maitiro maparamendi akadai sekuita tembiricha, kudzvanywa, monomer feed rates, uye kuomesa mamiriro anoramba achitariswa uye kugadziridzwa kuchengetedza chigadzirwa mhando uye kuenderana.
Particle Characterization: Particle size distribution, morphology, uye pamusoro pezvimiro zvepolymer powders zvinoongororwa pachishandiswa matekiniki akadai selaser diffraction, electron microscopy, uye ongororo yenzvimbo.
Performance Testing: Iwo anodhindwazve polymer hupfu anoyedzwa kuita kwakakura kuti aongorore simba rawo rekunamatira, kuumbwa kwefirimu, kuramba kwemvura, uye zvivakwa zvemuchina zvinoenderana neindasitiri zviyero uye zvinodiwa nevatengi.
Kugadzikana Kuyedzwa: Yakakurumidza kuchembera bvunzo uye kugadzikana zvidzidzo zvinoitiswa kuongorora kugadzikana kwenguva refu kweRDPs pasi peakasiyana ekuchengetedza mamiriro, kusanganisira tembiricha uye humidity kusiyana.
Kugadzirwa kweadhispersible polymer poda kunosanganisira akaomesesa akatevedzana matanho, kubva emulsion polymerization kusvika kupfapfaidza kuomesa uye mushure mekurapa maitiro. Nekunyatso kudzora zviwanikwa, maparamendi ekugadzirisa, uye nhanho dzekudzora mhando, vagadziri vanogona kuve nechokwadi chekuenderana uye kuita kweRDPs kune akasiyana maapplication mukuvaka, anonamira, uye maindasitiri ekuputira. Kunzwisisa kuomarara kwemaitiro ekugadzira kwakakosha pakugadzirisa hunhu hwechigadzirwa uye kusangana nezvinoda kuitika zvevatengi mumusika.
Nguva yekutumira: Mar-12-2024