I-Redispersible Polymer Powder (RDP)yinto engumgubo eyenziwe ngokomisa i-polymer emulsion, edla ngokusetyenziswa kwizinto ezifana nokwakha, iingubo, izinto zokuncamathelisa, kunye nokunamathiswa kweethayile. Umsebenzi wayo oyintloko kukusasaza kwakhona kwi-emulsion ngokongeza amanzi, ukubonelela ngokubambelela kakuhle, ukuqina, ukuxhathisa kwamanzi, ukumelana nokuqhekeka, kunye nokumelana nemozulu.
Ukwakhiwa kweRedispersible Polymer Powder (RDP) kunokuhlalutywa kwimiba emininzi, ingakumbi kubandakanywa amacandelo alandelayo:
1. I-polymer resin
Inxalenye ephambili ye-Redispersible Polymer Powder yi-polymer resin, edla ngokuba yipolymer efunyenwe nge-emulsion polymerization. Iirensi zepolymer eziqhelekileyo ziquka:
I-Polyvinyl alcohol (PVA): ineempawu ezintle zokubambelela kunye nefilimu kwaye isetyenziswa ngokubanzi kwizinto zokwakha.
Iipolyacrylates (ezifana ne-polyacrylates, i-polyurethanes, njl.): zine-elastic egqwesileyo, ukomelela kwebhondi, kunye nokunganyangeki kwamanzi.
I-Polystyrene (PS) okanye i-ethylene-vinyl acetate copolymer (EVA): ngokuqhelekileyo isetyenziselwa ukuphucula iipropati zokwenza ifilimu, ukwandisa ukuchasana kwamanzi, kunye nokuchasana kwemozulu.
I-Polymethyl methacrylate (PMMA): Le polima ine-anti-aging elungileyo kunye nokungafihli.
Ezi resins ze-polymer zenza i-emulsions ngokusebenzisa i-polymerization reactions, kwaye emva koko amanzi kwi-emulsion asuswa ngokutshiza okanye ukumisa okomisa, kwaye ekugqibeleni i-Redispersible Polymer Powder (RDP) kwifom yomgubo ifunyenwe.
2. Ii-surfactants
Ukuze kugcinwe ukuzinza phakathi kweengqungquthela ze-polymer kwaye ugweme i-agglomeration kwi-powder, inani elifanelekileyo le-surfactants liya kongezwa ngexesha lenkqubo yokuvelisa. Indima ye-surfactants kukunciphisa ukunyanzeliswa komhlaba phakathi kwamaqhekeza kunye nokunceda amaqhekeza ahlakazeke emanzini. Ii-surfactants eziqhelekileyo ziquka:
I-non-ionic surfactants (ezifana neepolyethers, i-polyethylene glycols, njl.).
I-Anionic surfactants (ezifana ne-fatty acid salts, i-alkyl sulfonates, njl.).
Ezi zixhobo ze-surfactants zinokuphucula i-dispersible ye-Redispersible Polymer Powder (RDP) s, evumela ukuba i-latex powder iphinde yenze i-emulsion emva kokufaka amanzi.
3. Izihluzi kunye nezityebe
Ukuze ulungelelanise ukusebenza kwe-latex powders kunye nokunciphisa iindleko, ezinye iifayili kunye ne-thickeners nazo zinokongezwa ngexesha lokuvelisa. Kukho iintlobo ezininzi zeefayili, kwaye eziqhelekileyo ziquka:
I-Calcium carbonate: i-filler ye-inorganic esetyenziswa ngokuqhelekileyo enokunyusa ukubambelela kunye nokuphucula indleko-ngempumelelo.
I-Talc: inokunyusa umbane kunye nokumelana nokuqhekeka kwezinto.
Iiminerali ze-silicate: ezifana ne-bentonite, i-graphite eyandisiweyo, njl., inokunyusa ukunyanzeliswa kokuqhekeka kunye nokuxhatshazwa kwamanzi kwezinto.
I-Thickeners idla ngokusetyenziselwa ukulungisa i-viscosity yemveliso ukuyiqhelanisa neemeko ezahlukeneyo zokwakha. Izityebi eziqhelekileyo ziquka i-hydroxypropyl methylcellulose (HPMC) kunye ne-polyvinyl alcohol (PVA).
4. Anti-caking arhente
Kwiimveliso zomgubo, ukwenzela ukukhusela i-agglomeration ngexesha lokugcinwa kunye nokuthutha, i-anti-caking agents nazo zinokongezwa ngexesha lenkqubo yokuvelisa. Anti-caking agents ikakhulu ezinye izinto ezicolekileyo ezingaphiliyo, ezifana aluminiyam silicate, isilicon dioxide, njalo njalo. Ezi zinto zinokwenza ifilimu ekhuselayo kumphezulu wamasuntswana omgubo welatex ukuthintela amasuntswana ukuba ahlangane kunye.
5. Ezinye izongezo
I-Redispersible Polymer Powder (RDP) inokuphinda iqulathe izongezo ezikhethekileyo zokuphucula iimpawu ezithile:
I-agent ekwazi ukumelana ne-UV: iphucula ukuxhathisa kwemozulu kunye nokukwazi ukuchasana nokuguga kwezinto.
I-agent ye-antibacterial: inciphisa ukukhula kwe-microorganisms, ngakumbi xa isetyenziswe kwindawo enomswakama.
I-Plasticizer: iphucula ukuguquguquka kunye nokumelana nokuqhekeka kwe-latex powder.
I-Antifreeze: Thintela izinto zokukhenkceza kwiindawo eziphantsi kweqondo lokushisa, ezichaphazela ukwakhiwa kunye nokusetyenziswa kwemiphumo.
6. Ukufuma
Nangona i-Redispersible Polymer Powder (RDP) ikwimo yepowder eyomileyo, ifuna kwakhona umlinganiselo othile wokulawula umswakama ngexesha lenkqubo yokuvelisa, kwaye umgangatho womswakama uvame ukulawulwa ngaphantsi kwe-1%. Umswakama ofanelekileyo unceda ukugcina ukumanzi kunye nokuzinza kwexesha elide lomgubo.
Indima kunye nokusebenza kweRedispersible Polymer Powder (RDP)
Indima ephambili ye-Redispersible Polymer Powder (RDP) kukuba inokusasazwa kwakhona ukwenza i-emulsion emva kokongeza amanzi, kwaye inezi mpawu zilandelayo ezibalulekileyo zokusebenza:
Ukunamathela okugqwesileyo: Ukuphucula ukukwazi ukubopha i-coatings kunye ne-adhesives, kunye nokuphucula amandla okudibanisa phakathi kwezinto zokwakha.
I-Elasticity kunye nokuguquguquka: Phucula i-elasticity ye-coating, yongeza ukuxhathisa kwayo ekuqhekekeni kunye nokuchasana kwempembelelo.
Ukumelana namanzi: Ukuphucula ukuxhathisa kwamanzi kwizinto eziphathekayo, ezifanelekileyo ukusetyenziswa kwiindawo zangaphandle okanye ezifumileyo.
Ukuchasana neMozulu: Phucula ukuxhathisa kwe-UV, ukulwa nokuguga kunye nezinye iipropathi, kunye nokwandisa ubomi bayo benkonzo.
Ukumelana nokuqhekeka: Inokumelana nokuqhekeka okuhle kwaye ilungele iimfuno ezichasene nokuqhekeka kwiiprojekthi zokwakha.
iRDPyenziwa ngokuguqula i-emulsion polymer ibe ngumgubo ngenkqubo entsonkothileyo. Ineempawu ezininzi ezigqwesileyo kwaye isetyenziswa ngokubanzi kulwakhiwo, ukwambathisa, izinto zokuncamathelisa kunye nezinye iindawo. Ukukhethwa kunye nomlinganiselo wezithako zayo zichaphazela ngokuthe ngqo ukusebenza kwayo kokugqibela.
Ixesha lokuposa: Mar-11-2025