Redispersible Latex Powder (RDP) chinhu chakakosha chekuvaka uye chinoshandiswa zvakanyanya mukuvaka zvinonamira, zvemadziro, zvepasi uye mamwe minda. Iyo yakanakisa redispersibility, adhesion uye kuchinjika kunopa iyo yakakosha mabhenefiti panguva yekuvaka maitiro.
1. Kugadzirira emulsion
Nhanho yekutanga mukugadzira redispersible latex poda ndeyekugadzirira emulsion. Izvi zvinowanzoitwa ne emulsion polymerization. Emulsion polymerization ndeyemvura chikamu sisitimu inoumbwa neyakafanana kuparadzira monomers, emulsifiers, initiators uye zvimwe mbishi zvinhu mumvura. Munguva ye polymerization process, monomers polymerize pasi pechiito chevatangi vekugadzira polymer cheni, nekudaro vachigadzira yakagadzikana emulsion.
Inowanzo shandiswa monomers ye emulsion polymerization inosanganisira ethylene, acrylates, styrene, etc. Zvichienderana nezvinhu zvinodiwa, monomers dzakasiyana-siyana dzinogona kusarudzwa kune copolymerization. Semuenzaniso, ethylene-vinyl acetate copolymer (EVA) emulsion inoshandiswa zvakanyanya mukugadzirira redispersible latex powder nekuda kwekunaka kwayo kwemvura uye kunamatira.
2. Kupfapfaidza kuomesa
Mushure mekunge emulsion yagadzirwa, inoda kushandurwa kuita pfumbu redispersible latex poda. Iyi nhanho inowanzoitwa kuburikidza nekupfapfaidza kuomesa tekinoroji. Spray drying inzira yekuomesa inokurumidza kushandura zvinhu zvemvura kuita hupfu.
Munguva yekuomeswa kwekupfapfaidza, iyo emulsion inogadziriswa kuita madonhwe akanaka kuburikidza nemuromo uye yakabatwa nemhepo inopisa inopisa. Mvura iri mumadonhwe inokurumidza kubuda, uye chinhu chakasara chakasimba chinomonereka kuita twunhu twudiki. Kiyi yekupfapfaidza kuomesa ndeye kudzora tembiricha yekuomesa uye nguva yekuona yunifomu particle saizi ye latex poda uye yakakwana kuomeswa, uchidzivirira kupisa kunokonzerwa nekupisa kwakanyanya.
3. Kurapa kwepamusoro
Kuti uvandudze kushanda uye kugadzikana kwe redispersible latex powder, nzvimbo yayo inowanzobatwa. Chinangwa chikuru chekurapa kwepamusoro ndechekuwedzera fluidity yehupfu, kuvandudza kugadzikana kwayo kwekuchengetedza uye kuwedzera kudhindwa kwayo mumvura.
Nzira dzakajairika dzekurapa pamusoro dzinosanganisira kuwedzerwa kweanorwisa-caking agents, maajenti ekupfekedza uye ma surfactants. Anti-caking agents vanogona kudzivirira hupfu kubva pakiki panguva yekuchengetedza uye kuchengetedza mvura yayo yakanaka; Coating agents vanowanzo shandisa mamwe mapolymer anonyungudika nemvura kuti apfekedze latex poda kudzivirira kupindira kwemwando; kuwedzererwa kwema surfactants kunogona Kuvandudza redispersibility ye latex poda kuitira kuti ikurumidze kuparadzirwa uye yakaenzana mushure mekuwedzera mvura.
4. Packaging uye kuchengetedza
Yekupedzisira nhanho mukugadzirwa kweiyo redispersible latex poda kurongedza uye kuchengetedza. Kuti uone kunaka uye kuita kwechigadzirwa, kutarisisa kunofanirwa kubhadharwa kudzivirira hunyoro, kusvibiswa uye guruva kubva pakubhururuka panguva yekurongedza. Kazhinji redispersible latex poda inoputirwa mumabhegi emapepa akawanda kana mabhegi epurasitiki ane kunaka kwekunyorova, uye desiccant inoiswa mukati mebhegi kudzivirira unyoro.
Paunenge uchichengeta, redispersible latex poda inofanira kuiswa munzvimbo yakaoma, inofefetera, kure nechiedza chezuva uye tembiricha yakakwira, kudzivirira hupfu hwakakanika kana kushatisa kwekuita.
Maitiro ekugadzira redispersible latex poda anosanganisira akawanda matanho senge emulsion kugadzirira, kupfapfaidza kuomesa, kurapwa kwepamusoro, kurongedza uye kuchengetedza. Nekunyatso kudzora ma parameter ega ega chinongedzo, redispersible latex poda ine hunyanzvi hwekuita uye yakagadzikana mhando inogona kugadzirwa kuti isangane nezvinodiwa zvakasiyana zveindasitiri yezvivakwa zvekuvaka. Nekuenderera mberi kwekufambira mberi kwetekinoroji, iyo nzira yekugadzirira yeredispersible latex poda ichave yakawedzera hushamwari uye inoshanda mune ramangwana, uye kuita kwechigadzirwa kuchawedzera kuvandudzwa.
Nguva yekutumira: Aug-27-2024