Redispersible Polymer Powder (RDP)ke ntho e entsoeng ka phofo e entsoeng ka ho omisa emulsion ea polymer, e atisang ho sebelisoa linthong tse kang ho haha, liphahlo, likhomaretsi le li-adhesives tsa lithaele. Mosebetsi oa eona o ka sehloohong ke ho qhalakanya hape ka emulsion ka ho eketsa metsi, ho fana ka ho khomarela hantle, elasticity, ho hanyetsa metsi, ho hanyetsa ho phatloha, le ho hanyetsa boemo ba leholimo.
Sebopeho sa Redispersible Polymer Powder (RDP) se ka hlahlojoa ho tsoa likarolong tse ngata, haholo-holo ho kenyelletsa le likarolo tse latelang:
1. Resin ea polymer
Karolo ea mantlha ea Redispersible Polymer Powder ke resin ea polymer, eo hangata e leng polymer e fumanoang ka emulsion polymerization. Li-resin tse tloaelehileng tsa polymer li kenyelletsa:
Polyvinyl alcohol (PVA): e na le thepa e ntle ea ho khomarela le ea ho etsa lifilimi 'me e sebelisoa haholo ho thepa ea mohaho.
Li-polyacrylates (tse kang polyacrylates, polyurethanes, joalo-joalo): li na le elasticity e babatsehang, matla a ho kopanya, le ho thibela metsi.
Polystyrene (PS) kapa ethylene-vinyl acetate copolymer (EVA): e atisa ho sebelisoa ho ntlafatsa thepa ea ho etsa lifilimi, ho eketsa ho hanyetsa metsi, le ho hanyetsa boemo ba leholimo.
Polymethyl methacrylate (PMMA): Polima ena e na le anti-botsofali e ntle le pepeneneng.
Li-resin tsena tsa polymer li etsa li-emulsions ka liketso tsa polymerization, ebe metsi a emulsion a tlosoa ka ho omisa ka spray kapa ho omisa, 'me qetellong ho fumanoa Redispersible Polymer Powder (RDP) ka mokhoa oa phofo.
2. Li-surfactants
E le ho boloka botsitso pakeng tsa likaroloana tsa polymer le ho qoba agglomeration ka phofo, palo e loketseng ea li-surfactants e tla ekeletsoa nakong ea tlhahiso. Mosebetsi oa li-surfactants ke ho fokotsa tsitsipano ea holim'a metsi pakeng tsa likaroloana le ho thusa likaroloana ho hasana ka metsing. Li-surfactants tse tloaelehileng li kenyelletsa:
Li-surfactants tse seng tsa ionic (tse kang polyethers, polyethylene glycols, joalo-joalo).
Li-surfactants tsa anionic (tse kang mafura a acid letsoai, alkyl sulfonates, joalo-joalo).
Li-surfactants tsena li ka ntlafatsa ho senyeha ha Redispersible Polymer Powder (RDP) s, ho lumella phofo ea latex hore e boele e thehe emulsion ka mor'a ho eketsa metsi.
3. Li-fillers le li-thickeners
E le ho fetola ts'ebetso ea li-powders tsa latex le ho fokotsa litšenyehelo, li-fillers le li-thickeners tse ling li ka boela tsa ekeletsoa nakong ea tlhahiso. Ho na le mefuta e mengata ea li-fillers, 'me tse tloaelehileng li kenyelletsa:
Calcium carbonate: setlatsi sa inorganic se sebelisoang hangata se ka eketsang ho khomarela le ho ntlafatsa ts'ebetso ea litšenyehelo.
Talc: e ka eketsa mokelikeli le ho hanyetsa ho phatloha ha thepa.
Liminerale tsa silicate: tse kang bentonite, graphite e atolositsoeng, joalo-joalo, e ka ntlafatsa ho hanyetsa ha metsi le ho hanyetsa metsi a thepa.
Hangata li-thickeners li sebelisoa ho lokisa viscosity ea sehlahisoa ho se lumellana le maemo a fapaneng a kaho. Li-thickeners tse tloaelehileng li kenyelletsa hydroxypropyl methylcellulose (HPMC) le polyvinyl alcohol (PVA).
4. Moemeli oa anti-caking
Ka lihlahisoa tse phofshoana, e le ho thibela ho kopana nakong ea polokelo le lipalangoang, li-anti-caking agents li ka boela tsa ekeletsoa nakong ea tlhahiso. Anti-caking mahlahana a haholo-holo ba bang ba lintho tse ntle inorganic, tse kang aluminium silicate, silicon dioxide, joalo-joalo Lintho tsena li ka etsa filimi e sireletsang holim'a likaroloana tsa latex phofo ho thibela likaroloana ho tloha agglomerating hammoho.
5. Lisebelisoa tse ling
Redispersible Polymer Powder (RDP) e kanna ea ba le litlatsetso tse khethehileng ho ntlafatsa thepa e itseng:
Moemeli o hanyetsanang le UV: e ntlafatsa ho hanyetsa boemo ba leholimo le bokhoni ba ho thibela botsofali ba thepa.
Antibacterial agent: e fokotsa kholo ea likokoana-hloko, haholo-holo ha e sebelisoa sebakeng se mongobo.
Plasticizer: e ntlafatsa ho feto-fetoha ha maemo le ho hanyetsa mapheo a phofo ea latex.
Antifreeze: Thibela thepa ho tloha serameng maemong a mocheso o tlase, e amang litlamorao tsa kaho le ts'ebeliso.
6. Mongobo
Le hoja Redispersible Polymer Powder (RDP) e le ka mokhoa oa phofo e omileng, e boetse e hloka tekanyo e itseng ea taolo ea mongobo nakong ea tlhahiso ea tlhahiso, 'me hangata mongobo o laoloa ka tlase ho 1%. Mongobo o nepahetseng o thusa ho boloka metsi le botsitso ba nako e telele ea phofo.
Karolo le ts'ebetso ea Redispersible Polymer Powder (RDP)
Karolo ea bohlokoa ea Redispersible Polymer Powder (RDP) ke hore e ka qhaloa hape ho theha emulsion ka mor'a ho eketsa metsi, 'me e na le litšobotsi tse latelang tsa bohlokoa tsa ts'ebetso:
Ho khomarela ka mokhoa o babatsehang: Ntlafatsa bokhoni ba tlamahano ba lirafshoa le likhomaretsi, 'me u ntlafatse matla a maqhama pakeng tsa thepa ea mohaho.
Elasticity le ho feto-fetoha ha maemo: Ntlafatsa elasticity ea ho roala, ho ntlafatsa ho hanyetsa ha eona le ho hanyetsa phello.
Ho hanyetsa metsi: Ntlafatsa ho hanyetsa metsi ha thepa, e loketseng ho sebelisoa libakeng tse ka ntle kapa tse mongobo.
Ho hanyetsa boemo ba leholimo: Ntlafatsa khanyetso ea UV ea thepa, anti-botsofali le thepa e 'ngoe, le ho lelefatsa bophelo ba eona ba ts'ebeletso.
Crack resistance: E na le khanyetso e ntle ea crack 'me e loketse litlhoko tse thibelang ho peperana mererong ea kaho.
RDPe entsoe ka ho fetola emulsion polymer hore e be phofo ka mokhoa o rarahaneng. E na le thepa e ngata e babatsehang 'me e sebelisoa haholo kahong, ho roala, ho khomarela le masimo a mang. Khetho le karolo ea metsoako ea eona e ama ka ho toba tshebetso ea eona ea ho qetela.
Nako ea poso: Mar-11-2025