Polymer powders (RDPs) na-arụ ọrụ dị oke mkpa na ụlọ ọrụ dị iche iche, gụnyere ihe owuwu, nrapado, na mkpuchi. A na-eji ntụ ntụ ndị a eme ihe n'ọtụtụ ebe maka imeziwanye njirimara nke ihe simenti, na-eme ka adhesion, mgbanwe na ịdịte aka. Ịghọta usoro mmepụta nke RDP dị mkpa maka ndị na-emepụta ihe iji hụ na ngwaahịa dị elu.
Ngwaọrụ :
Mmepụta nke powders polymer redisspersible na-amalite site na iji nlezianya họrọ akụrụngwa na-emetụta njirimara nke ngwaahịa ikpeazụ. Ihe ndị bụ isi gụnyere resin polymer, colloid nchebe, plasticizers, na ihe mgbakwunye dị iche iche.
Polymer resins: Ethylene-vinyl acetate (EVA), vinyl acetate-ethylene (VAE), na acrylic polymers na-ejikarị eme ihe dị ka isi polymer resins. Resins ndị a na-enye adhesion, mgbanwe, na mgbochi mmiri na RDPs.
Colloid na-echebe: A na-agbakwunye colloid na-echebe hydrophilic dị ka mmanya polyvinyl (PVA) ma ọ bụ ethers cellulose iji mee ka ihe dị na polymer kwụsie ike n'oge ihicha na nchekwa, na-egbochi nchịkọta.
Plasticizers: Plasticizers na-eme ka mgbanwe na ịrụ ọrụ nke RDPs. Ihe ndị na-eme ka plastik na-emekarị gụnyere glycol ethers ma ọ bụ polyethylene glycols.
Ihe mgbakwunye: Enwere ike itinye ihe mgbakwunye dị iche iche dị ka ndị na-ekesa, ndị na-ebu ibu, na ndị na-ejikọ ọnụ iji welie ihe ndị dị ka dispersibility, rheology, ma ọ bụ ike igwe.
Usoro nhazi:
Mmepụta nke powders polymer redispersible gụnyere ọtụtụ usoro nhazi dị mgbagwoju anya, gụnyere emulsion polymerization, ịgba ihicha, na usoro ọgwụgwọ gachara.
Emulsion Polymerization:
Usoro na-amalite na emulsion polymerization, ebe monomers, mmiri, emulsifiers, na initiators na-agwakọta na reactor n'okpuru ọnọdụ a na-achịkwa nke okpomọkụ na nrụgide. Ndị monomers na-eme ka ọ bụrụ irighiri mmiri latex gbasasịa n'ime mmiri. Nhọrọ nke monomers na ọnọdụ mmeghachi omume na-ekpebi ihe mejupụtara polymer na ihe onwunwe.
Nkwụsi ike na coagulation:
Mgbe polymerization gasịrị, latex na-enweta nkwụsi ike site na ịgbakwunye colloid nchebe na stabilizers. Nke a nzọụkwụ na-egbochi urughuru coagulation na hụ na nkwụsi ike nke latex mgbasa. Enwere ike iwebata ndị na-ahụ maka coagulation iji kpalite coagulation nke ụmụ irighiri ihe latex na-achịkwa, na-etolite coagulum kwụsiri ike.
Ịkpọsa ahịhịa:
A na-enyezi mgbasa nke latex kwụsiri ike n'ime igwe nkụ. N'ime ụlọ ihicha mmiri, a na-agbasa mgbasa ahụ n'ime obere ụmụ irighiri mmiri na-eji nozzles dị elu. A na-ewebata ikuku na-ekpo ọkụ n'otu oge iji wepụ ihe dị n'ime mmiri, na-ahapụ n'azụ polymer siri ike. Ọnọdụ ihicha, gụnyere okpomoku ikuku mbanye, oge obibi, na ọnụego ikuku, na-emetụta ọdịdị morphology na ntụ ntụ.
Ọgwụgwọ gachaa:
Na-esochi ihicha ịgba, ihe na-akpata polymer ntụ ntụ na-enweta usoro ọgwụgwọ post-ọgwụgwọ iji melite arụmọrụ ya na nkwụsi ike nchekwa ya. Usoro ndị a nwere ike ịgụnye ngbanwe elu, granulation, na nkwakọ ngwaahịa.
a. Mgbanwe nke elu: Enwere ike itinye ihe ndị na-arụ ọrụ n'elu ma ọ bụ ndị na-ejikọta ọnụ iji gbanwee ihe ndị dị n'elu nke ihe ndị dị na polymer, na-eme ka mgbasa ha na ndakọrịta na ihe ndị ọzọ.
b. Granulation: Iji melite njikwa na dispersibility, na polymer ntụ ntụ nwere ike na-enweta granulation na-emepụta otu urughuru nha na ibelata uzuzu guzobe.
c. Nkwakọ ngwaahịa: A na-akwakọba RDP ikpeazụ n'ime mmiri na-eguzogide mmiri iji gbochie mmịpụta mmiri ma nọgide na-akwụsi ike n'oge nchekwa na njem.
Usoro njikwa ogo:
Njikwa ogo dị mkpa n'oge usoro mmepụta ahụ iji hụ na ọ na-agbanwe agbanwe na ntụkwasị obi na njirimara nke powders polymer redispersible. A na-enyocha ma na-achịkwa ọtụtụ paramita igodo na ọkwa dị iche iche:
Ogo Akụrụngwa: A na-eme nyocha nke ọma na nnwale nke akụrụngwa, gụnyere polymers, colloid, na mgbakwunye, iji nyochaa ịdịmma ha, ịdị ọcha na ndakọrịta na ngwa a chọrọ.
Nleba anya Usoro: Usoro usoro dị egwu dị ka okpomọkụ mmeghachi omume, nrụgide, ọnụego nri monomer, na ọnọdụ ihicha na-aga n'ihu na-enyocha ma gbanwee iji nọgide na-enwe àgwà ngwaahịa na nkwụsi ike.
Njirimara urughuru: A na-enyocha nkesa nha, morphology na ihe ndị dị n'elu nke polymer powders site na iji usoro dị ka diffraction laser, microscopy eletrọn, na nyocha mpaghara elu.
Nnwale arụmọrụ: polymer powders a na-emegharị emegharị na-enweta ule arụmọrụ dị ukwuu iji nyochaa ike nrapado ha, imepụta ihe nkiri, nguzogide mmiri, na akụrụngwa dịka ụkpụrụ ụlọ ọrụ siri dị na ihe ndị ahịa chọrọ.
Nnwale nkwụsi ike: A na-eme nyocha ngwa ngwa ịka nká na ọmụmụ nkwụsi ike iji nyochaa nkwụsi ike ogologo oge nke RDP n'okpuru ọnọdụ nchekwa dị iche iche, gụnyere mgbanwe okpomọkụ na iru mmiri.
Mmepụta nke powders polymer redispersible na-agụnye usoro usoro dị mgbagwoju anya, site na emulsion polymerization ka ịgbasa ihicha na usoro ọgwụgwọ. Site na iji nlezianya na-achịkwa akụrụngwa, nhazi nhazi, na njikwa njikwa mma, ndị na-emepụta ihe nwere ike hụ na ịdị mma na arụmọrụ RDP na-agbanwe agbanwe maka ngwa dị iche iche na-ewu ụlọ, nrapado, na ụlọ ọrụ mkpuchi. Ịghọta mgbagwoju anya nke usoro mmepụta ihe dị mkpa maka ịkwalite njirimara ngwaahịa na izute mkpa ndị ahịa na-agbanwe agbanwe na ahịa.
Oge nzipu: Mar-12-2024