Ntụ ntụ Polymer Redispersible (RDP)bụ ihe na-acha ntụ ntụ nke e ji emulsion polima kpọrọ nkụ mee, nke a na-ejikarị eme ihe dịka ihe owuwu, ihe mkpuchi, ihe nrapado, na ihe nrapado taịlị. Isi ọrụ ya bụ ịgbasa ọzọ n'ime emulsion site na ịgbakwunye mmiri, inye ezigbo nrapado, mgbanwe, iguzogide mmiri, iguzogide mgbawa, na iguzogide ihu igwe.
Enwere ike inyocha ihe mejupụtara Redispersible Polymer Powder (RDP) site na ọtụtụ akụkụ, ọkachasị gụnyere ihe ndị a:
1. Resin polima
Isi ihe dị na Redispersible Polymer Powder bụ polymer resin, nke na-abụkarị polymer nke emulsion polymerization na-enweta. Resin polymer ndị a na-ahụkarị gụnyere:
Mmanya Polyvinyl (PVA): nwere ezigbo njikọta na ihe ndị na-emepụta ihe nkiri ma a na-ejikarị ya eme ihe n'ihe owuwu ụlọ.
Polyacrylates (dịka polyacrylates, polyurethanes, wdg): nwere ezigbo ike ịgbatị ahụ, ike njikọ, na iguzogide mmiri.
Polystyrene (PS) ma ọ bụ ethylene-vinyl acetate copolymer (EVA): a na-ejikarị ya eme ka ihe ndị na-emepụta fim ka mma, mee ka mmiri ghara iguzogide ya, nakwa ka ihu igwe ghara iguzogide ya.
Polymethyl methacrylate (PMMA): Polymer a nwere ezigbo mgbochi ịka nká na nghọta.
Resin polymer ndị a na-emepụta emulsions site na mmeghachi omume polymerization, wee wepụ mmiri dị na emulsion ahụ site na ịgbasa ma ọ bụ ịkpọ nkụ na friji, n'ikpeazụkwa, a na-enweta Redispersible Polymer Powder (RDP) n'ụdị ntụ.
2. Ndị na-agbapụta mmiri
Iji mee ka ihe ndị dị na polima kwụsie ike ma zere ịchịkọta ntụ ntụ ahụ, a ga-agbakwunye ọnụọgụ surfactants kwesịrị ekwesị n'oge mmepụta. Ọrụ nke surfactants bụ ibelata nrụgide elu dị n'etiti ihe ndị dị na ha ma nyere ihe ndị dị na ha aka ịgbasa n'ime mmiri. Ihe ndị a na-ahụkarị gụnyere:
ihe ndị na-abụghị ionic (dịka polyethers, polyethylene glycols, wdg).
Anionic surfactants (dịka nnu abụba acid, alkyl sulfonates, wdg).
Ihe ndị a na-emepụta ihe nwere ike ime ka Redispersible Polymer Powder (RDP) ghara ịgbasa nke ọma, na-enye ohere ka ntụ latex gbanwee emulsion mgbe etinyere ya mmiri.
3. Ihe na-emeju ihe na ihe ndị na-eme ka ihe sie ike
Iji gbanwee arụmọrụ nke ntụ latex ma belata ọnụ ahịa, enwere ike itinye ụfọdụ ihe na-eme ka ihe sie ike na ihe na-eme ka ihe sie ike n'oge mmepụta. E nwere ọtụtụ ụdị ihe na-eme ka ihe dị nro, ndị a na-ahụkarị gụnyere:
Calcium carbonate: ihe na-eme ka ihe na-adịghị mma nke a na-ejikarị eme ihe nke nwere ike ime ka njikọta dịkwuo mma ma melite arụmọrụ ọnụ ahịa.
Talc: nwere ike ime ka ihe ahụ dị nro ma gbawaa nke ọma.
Ihe ndị dị ka silicate mineral: dịka bentonite, graphite gbasaa, wdg, nwere ike ime ka ihe ahụ ghara ịgbawa agbawa ma gbochie mmiri.
A na-ejikarị ihe ndị na-eme ka ihe dị arọ gbanwee viscosity nke ngwaahịa ahụ ka o wee kwekọọ n'ọnọdụ dị iche iche e ji arụ ya. Ihe ndị na-eme ka ihe dị arọ gụnyere hydroxypropyl methylcellulose (HPMC) na polyvinyl alcohol (PVA).
4. Ihe na-egbochi achịcha
N'ime ngwaahịa ntụ ntụ, iji gbochie njikọta n'oge nchekwa na njem, enwere ike itinye ihe mgbochi njikọta n'oge usoro mmepụta. Ihe mgbochi njikọta bụ isi ihe ndị na-adịghị mma, dịka aluminium silicate, silicon dioxide, wdg. Ihe ndị a nwere ike ịmepụta ihe mkpuchi nchebe n'elu ihe ntụ ntụ latex iji gbochie ihe ndị ahụ ịchịkọta ọnụ.
5. Ihe mgbakwunye ndị ọzọ
Ntụ ntụ Polymer Redispersible (RDP) nwekwara ike ịnwe ụfọdụ ihe mgbakwunye pụrụ iche iji melite njirimara ụfọdụ:
Ihe na-eguzogide UV: na-eme ka iguzogide ihu igwe na ikike mgbochi ịka nká nke ihe ahụ ka mma.
Ihe na-egbochi nje bacteria: na-ebelata uto nke nje bacteria, karịsịa mgbe ejiri ya mee ihe n'ebe mmiri dị.
Plasticizer: na-eme ka ntụ ntụ latex dịkwuo mma ma na-eme ka ọ dị mfe ịgbanwe agbanwe.
Mgbochi oyi: Na-egbochi ihe ndị e ji eme ihe ka ha ghara ifụ n'ebe okpomọkụ dị ala, na-emetụta mmetụta owuwu na ojiji.
6. Mmiri mmiri
Ọ bụ ezie na ntụ ntụ Redispersible Polymer (RDP) dị n'ụdị ntụ ntụ kpọrọ nkụ, ọ chọkwara ka e jiri mmiri chịkwaa ya n'oge mmepụta ya, a na-achịkwakwa mmiri dị n'ime ya n'okpuru 1%. Mmiri dị mma na-enyere aka ịnọgide na-enwe mmiri mmiri na nkwụsi ike ogologo oge nke ntụ ahụ.
Ọrụ na arụmọrụ nke Redispersible Polymer Powder (RDP)
Ọrụ dị mkpa nke Redispersible Polymer Powder (RDP) bụ na enwere ike ịgbasa ya ọzọ ka ọ bụrụ emulsion mgbe etinyere mmiri, ma nwee njirimara arụmọrụ dị mkpa ndị a:
Nrachi dị mma: Mee ka ikike njikọ nke mkpuchi na ihe nrachi dịkwuo mma, ma melite ike njikọ n'etiti ihe owuwu.
Nhazi na mgbanwe: Meziwanye ike nke mkpuchi ahụ, mee ka ike mgbawa ya dịkwuo mma ma gbochie mmetụta ya.
Mgbochi mmiri: Mee ka ihe ahụ ghara iguzogide mmiri nke ọma, nke dị mma maka ojiji n'èzí ma ọ bụ gburugburu ebe mmiri dị.
Mgbochi ihu igwe: Meziwanye iguzogide UV, mgbochi ịka nká na ihe ndị ọzọ dị na ihe ahụ, ma gbasaa ndụ ọrụ ya.
Mgbochi mgbawa: Ọ nwere ezigbo iguzogide mgbawa ma dabara adaba maka mkpa mgbochi mgbawa n'ọrụ owuwu.
RDPA na-eme ya site n'ịgbanwe polima emulsion ka ọ bụrụ ntụ site na usoro dị mgbagwoju anya. O nwere ọtụtụ ihe onwunwe dị mma ma a na-ejikarị ya eme ihe n'iwu ụlọ, mkpuchi, ihe nrapado na ubi ndị ọzọ. Nhọrọ na oke nke ihe ndị mejupụtara ya na-emetụta arụmọrụ ikpeazụ ya ozugbo.
Oge ozi: Maachị-11-2025