Umgubo wePolymer ophinda unyibilike (RDP)yinto efana nomgubo eyenziwe yi-polymer emulsion eyomileyo, esetyenziswa kakhulu kwizinto ezifana nolwakhiwo, ii-coating, i-adhesives, kunye ne-tile adhesives. Umsebenzi wayo ophambili kukuphinda inyibilike ibe yi-emulsion ngokongeza amanzi, inike ukunamathela okuhle, ukuthamba, ukumelana namanzi, ukumelana nokuqhekeka, kunye nokumelana nemozulu.
Ukwakheka kweRedispersible Polymer Powder (RDP) kungahlalutywa kwiinkalo ezininzi, kuquka ikakhulu ezi zinto zilandelayo:
1. I-resin ye-polymer
Eyona nto iphambili kwiRedispersible Polymer Powder yipolymer resin, edla ngokuba yipolymer efunyenwe yi-emulsion polymerization. Iipolymer resin eziqhelekileyo ziquka:
I-Polyvinyl alcohol (PVA): inamathela kakuhle kwaye ineempawu zokwenza ifilimu kwaye isetyenziswa kakhulu kwizixhobo zokwakha.
IiPolyacrylates (ezifana neepolyacrylates, iipolyurethanes, njl.njl.): zinobunyulu obuhle kakhulu, zinamandla okubopha, kwaye zinokumelana namanzi.
I-Polystyrene (PS) okanye i-ethylene-vinyl acetate copolymer (EVA): isetyenziswa kakhulu ukuphucula iipropati zokwenza ifilimu, ukwandisa ukumelana namanzi, kunye nokumelana nemozulu.
I-Polymethyl methacrylate (PMMA): Le polymer inamandla okulwa nokwaluphala kwaye ayifihli nto.
Ezi resins zepolymer zenza ii-emulsions ngokusebenzisa ii-polymerization reactions, aze amanzi akwi-emulsion asuswe ngokufutha okanye ngokuqandisa nge-freeze, aze ekugqibeleni kufunyanwe i-Redispersible Polymer Powder (RDP) ekwimo ye-powder.
2. Izinto ezibangela ii-surfactants
Ukuze kugcinwe uzinzo phakathi kwee-polymer particles kunye nokuthintela ukuhlangana kwi-powder, inani elifanelekileyo le-surfactants liya kongezwa ngexesha lenkqubo yemveliso. Indima ye-surfactants kukunciphisa uxinzelelo lomphezulu phakathi kwee-particles kunye nokunceda ii-particles zisasazeke emanzini. Ii-surfactants eziqhelekileyo ziquka:
Ii-surfactants ezingezizo ii-ionic (ezifana nee-polyethers, ii-polyethylene glycols, njl.njl.).
Ii-surfactants ze-anionic (ezifana neetyuwa ze-fatty acid, i-alkyl sulfonates, njl.njl.).
Ezi surfactants zinokuphucula ukusasazeka kweRedispersible Polymer Powder (RDP), zivumela umgubo welatex ukuba uphinde wenze i-emulsion emva kokongeza amanzi.
3. Izihluzi kunye neziqinisi
Ukuze kulungiswe ukusebenza kweempuphu zelatex nokunciphisa iindleko, ezinye izizalisi kunye neziqinisi zingongezwa ngexesha lokuveliswa. Kukho iintlobo ezininzi zezizalisi, kwaye eziqhelekileyo ziquka:
I-calcium carbonate: isizalisi esingadalwanga esisetyenziswa rhoqo esinokunyusa ukunamathela kunye nokuphucula ukusebenza kakuhle kweendleko.
I-Talc: inokunyusa ukunyibilika kunye nokumelana nokuqhekeka kwezinto.
Iiminerali zeSilicate: ezifana ne-bentonite, i-grafiti eyandisiweyo, njl.njl., zinokuphucula ukumelana nokuqhekeka kunye nokumelana namanzi kwezinto.
Izinto zokuthina zidla ngokusetyenziswa ukulungisa ubungqindilili bemveliso ukuze ivumelane neemeko ezahlukeneyo zokwakha. Izinto zokuthina eziqhelekileyo ziquka i-hydroxypropyl methylcellulose (HPMC) kunye ne-polyvinyl alcohol (PVA).
4. Iarhente yokulwa nokubopha
Kwiimveliso ezigutyiweyo, ukuze kuthintelwe ukuhlangana ngexesha lokugcina nokuthuthwa, ii-anti-caking agents nazo zingongezwa ngexesha lenkqubo yemveliso. Ii-anti-caking agents ikakhulu zizinto ezincinci ezingaphiliyo, ezifana ne-aluminium silicate, i-silicon dioxide, njl. Ezi zinto zinokwenza ifilimu ekhuselayo kumphezulu wee-particles ze-latex powder ukuthintela ii-particles ukuba zingadibani.
5. Ezinye izongezo
I-Redispersible Polymer Powder (RDP) inokuba nezinye izongezo ezikhethekileyo ukuphucula iimpawu ezithile:
I-arhente enganyangekiyo yi-UV: iphucula ukumelana nemozulu kunye nokukwazi kwayo ukulwa nokwaluphala.
I-antibacterial agent: inciphisa ukukhula kweentsholongwane, ingakumbi xa isetyenziswa kwindawo enomswakama.
I-Plasticizer: iphucula ukuguquguquka kunye nokumelana nokuqhekeka komgubo we-latex.
I-Antifreeze: Ithintela ukuba izinto zingabanda kwiindawo ezinobushushu obuphantsi, nto leyo echaphazela ulwakhiwo kunye nemiphumo yokusetyenziswa.
6. Ukufuma
Nangona iRedispersible Polymer Powder (RDP) ikwimo yepowder eyomileyo, ikwafuna nomlinganiselo othile wolawulo lokufuma ngexesha lenkqubo yemveliso, kwaye umxholo wokufuma uhlala ulawulwa ngaphantsi kwe-1%. Umxholo wokufuma ofanelekileyo unceda ukugcina ukufuma kunye nokuzinza kwexesha elide kwepowder.
Indima kunye nokusebenza kweRedispersible Polymer Powder (RDP)
Indima ephambili yeRedispersible Polymer Powder (RDP) kukuba ingaphinda ichitheke ukuze yenze i-emulsion emva kokongeza amanzi, kwaye ineempawu zokusebenza ezibalulekileyo ezilandelayo:
Ukuncamathela okugqwesileyo: Ukuphucula amandla okubopha kweengubo kunye nezincamathelisi, kwaye kuphucule amandla okubopha phakathi kwezinto zokwakha.
Ukuthamba kunye nokuguquguquka: Ukuphucula ukuthamba kwengubo, ukuphucula ukuxhathisa kwayo iintanda kunye nokumelana neempembelelo.
Ukumelana namanzi: Yandisa ukumelana namanzi kwezinto, ezifanelekileyo ukusetyenziswa kwiindawo ezingaphandle okanye ezifumileyo.
Ukumelana nemozulu: Ukuphucula ukumelana ne-UV yezixhobo, ukulwa nokwaluphala kunye nezinye iimpawu, kwaye kwandise ubomi benkonzo yazo.
Ukumelana neentanda: Inokumelana neentanda kwaye ifanelekile kwiimfuno zokungaqhekeki kwiiprojekthi zokwakha.
I-RDPyenziwe ngokuguqula i-emulsion polymer ibe ngumgubo ngenkqubo enobuchule. Ineempawu ezininzi ezintle kwaye isetyenziswa kakhulu ekwakheni, kwiingubo, kwiiglu nakwezinye iindawo. Ukukhethwa kunye nomlinganiselo wezithako zayo kuchaphazela ngokuthe ngqo ukusebenza kwayo kokugqibela.
Ixesha leposi: Matshi-11-2025