I-Redispersible Polymer Powder (RDP)into eyimpuphu eyenziwe ngokomisa i-polymer emulsion, evame ukusetshenziswa ezintweni ezifana nokwakha, okokuhlanganisa, okunamathelayo, nezinamatheliso zamathayili. Umsebenzi wayo oyinhloko ukusabalalisa kabusha ku-emulsion ngokungeza amanzi, ukuhlinzeka ngokunamathela okuhle, ukunwebeka, ukumelana namanzi, ukumelana nokuqhekeka, nokumelana nesimo sezulu.
Ukwakheka kwe-Redispersible Polymer Powder (RDP) kungahlaziywa kusuka ezicini eziningi, ikakhulukazi kufaka phakathi izingxenye ezilandelayo:
1. I-polymer resin
Ingxenye eyinhloko ye-Redispersible Polymer Powder yi-polymer resin, ngokuvamile eyi-polymer etholakala nge-emulsion polymerization. Ama-resin we-polymer ajwayelekile afaka:
I-Polyvinyl alcohol (PVA): inezakhiwo ezinhle zokunamathela kanye nokwenziwa kwefilimu futhi isetshenziswa kabanzi ezintweni zokwakha.
I-Polyacrylates (njenge-polyacrylates, i-polyurethanes, njll.): inokunwebeka okuhle kakhulu, amandla okubopha, nokumelana namanzi.
I-Polystyrene (PS) noma i-ethylene-vinyl acetate copolymer (EVA): evame ukusetshenziselwa ukuthuthukisa izakhiwo zefilimu, ukwandisa ukumelana kwamanzi, nokumelana nesimo sezulu.
I-Polymethyl methacrylate (PMMA): Le polymer ine-anti-aging enhle futhi esobala.
Lezi zinhlayiya ze-polymer zakha ama-emulsions ngokusebenzisa ukusabela kwe-polymerization, bese amanzi aku-emulsion ekhishwa ngokumiswa kwesifutho noma ukomiswa kweqhwa, futhi ekugcineni kutholakala i-Redispersible Polymer Powder (RDP) efomini eliyimpushana.
2. Ama-surfactants
Ukuze ugcine ukuzinza phakathi kwezinhlayiya ze-polymer futhi ugweme ukuhlangana ku-powder, inani elifanele lama-surfactants lizokwengezwa phakathi nenqubo yokukhiqiza. Indima yama-surfactants ukunciphisa ukungezwani kwendawo phakathi kwezinhlayiya nokusiza izinhlayiya zihlakazeke emanzini. Ama-surfactants ajwayelekile afaka:
Ama-surfactants angewona ama-ionic (njengama-polyethylene, ama-polyethylene glycols, njll.).
Ama-Anionic surfactants (afana nosawoti onamafutha acid, i-alkyl sulfonates, njll.).
Lawa ma-surfactants angathuthukisa ukuhlakazeka kwe-Redispersible Polymer Powder (RDP)s, okuvumela i-latex powder ukuthi yakhe kabusha i-emulsion ngemva kokwengeza amanzi.
3. Ama-fillers nama-thickeners
Ukuze ulungise ukusebenza kwezimpushana ze-latex futhi unciphise izindleko, amanye ama-filler nama-thickeners angase angezwe ngesikhathi sokukhiqiza. Kunezinhlobo eziningi zokugcwalisa, futhi ezivamile zihlanganisa:
I-Calcium carbonate: isigcwalisi esingaphili esivame ukusetshenziswa esingakhuphula ukunamathela futhi sithuthukise ukusebenza kahle kwezindleko.
I-Talc: ingakhuphula uketshezi kanye nokumelana nokuqhekeka kwezinto.
Amaminerali e-silicate: njenge-bentonite, i-graphite eyandisiwe, njll., ingathuthukisa ukumelana nokuqhekeka nokumelana namanzi kwento.
Ama-thickeners ngokuvamile asetshenziselwa ukulungisa i-viscosity yomkhiqizo ukuze uvumelane nezimo ezihlukahlukene zokwakha. Ama-thickeners ajwayelekile afaka i-hydroxypropyl methylcellulose (HPMC) kanye ne-polyvinyl alcohol (PVA).
4. I-ejenti yokulwa namakhekhe
Emikhiqizweni eyimpuphu, ukuze kuvinjwe i-agglomeration ngesikhathi sokugcina nokuthutha, ama-anti-caking agents angase afakwe phakathi nenqubo yokukhiqiza. Ama-anti-caking agents ikakhulukazi ezinye zezinto ezinhle ze-inorganic, njenge-aluminium silicate, i-silicon dioxide, njll. Lezi zinto zingakha ifilimu evikelayo ebusweni bezinhlayiya zempushana ye-latex ukuvimbela izinhlayiya ukuba zihlangane ndawonye.
5. Ezinye izithasiselo
I-Redispersible Polymer Powder (RDP) ingase futhi iqukethe izithasiselo ezikhethekile zokuthuthukisa izakhiwo ezithile:
I-ejenti emelana ne-UV: ithuthukisa ukumelana nesimo sezulu kanye nekhono lokulwa nokuguga lempahla.
I-ejenti ye-antibacterial: inciphisa ukukhula kwama-microorganisms, ikakhulukazi uma isetshenziswa endaweni enomswakama.
I-Plasticizer: ithuthukisa ukuguquguquka nokumelana nokuqhekeka kwe-latex powder.
I-Antifreeze: Vimbela izinto eziqandisiwe ezindaweni ezishisayo, ezithinta ukwakhiwa kanye nemiphumela yokusebenzisa.
6. Umswakama
Nakuba i-Redispersible Polymer Powder (RDP) isesimweni se-powder eyomile, futhi idinga inani elithile lokulawula umswakama ngesikhathi senqubo yokukhiqiza, futhi okuqukethwe komswakama kuvame ukulawulwa ngaphansi kwe-1%. Umswakama ofanelekile usiza ukugcina uketshezi kanye nokuzinza kwesikhathi eside kwempushana.
Iqhaza nokusebenza kwe-Redispersible Polymer Powder (RDP)
Indima ebalulekile ye-Redispersible Polymer Powder (RDP) ukuthi ingahlakazwa kabusha ukuze yakhe i-emulsion ngemva kokwengeza amanzi, futhi inezimpawu zokusebenza ezibalulekile ezilandelayo:
Ukunamathela okuhle kakhulu: Thuthukisa ikhono lokuhlanganisa lezinto zokunamathela nezinamatheliso, futhi uthuthukise amandla okubopha phakathi kwezinto zokwakha.
I-Elasticity kanye nokuguquguquka: Thuthukisa ukunwebeka kokunamathela, uthuthukise ukumelana kwayo nokuqhekeka kanye nokumelana nomthelela.
Ukumelana namanzi: Thuthukisa ukumelana kwamanzi kwento, elungele ukusetshenziswa ezindaweni ezingaphandle noma ezinomswakama.
Ukumelana nesimo sezulu: Thuthukisa ukumelana kwe-UV kwempahla, ukulwa nokuguga nezinye izici, futhi wandise impilo yayo yesevisi.
Ukumelana nokuqhekeka: Inokumelana okuhle nokuqhekeka futhi ifanele izidingo zokunqanda ukuqhekeka kumaphrojekthi wokwakha.
I-RDPyenziwa ngokuguqula i-emulsion polymer ibe yimpushana ngenqubo eyinkimbinkimbi. Inezakhiwo eziningi ezinhle kakhulu futhi isetshenziswa kabanzi ekwakhiweni, ekubanjeni, ekunamathiseleni nakwezinye izinkambu. Ukukhethwa nengxenye yezithako zayo kuthinta ngqo ukusebenza kwayo kokugcina.
Isikhathi sokuthumela: Mar-11-2025