Redispersible polymer powders (RDP) ndi zosakaniza zovuta za ma polima ndi zowonjezera zomwe zimagwiritsidwa ntchito kwambiri pomanga, makamaka popanga matope osakaniza owuma. Ufawu umakhala ndi gawo lofunikira pakuwongolera magwiridwe antchito ndi mawonekedwe azinthu zosiyanasiyana zomangira monga zomatira matailosi, ma grouts, zodzipangira zokha komanso zomangira simenti.
Zigawo zazikulu:
Polima maziko:
Ethylene vinyl acetate (EVA): EVA copolymer imagwiritsidwa ntchito kwambiri mu RDP chifukwa cha mawonekedwe ake abwino kwambiri opangira mafilimu, kumamatira, komanso kusinthasintha. Zomwe zili mu vinyl acetate mu copolymer zitha kusinthidwa kuti zisinthe mawonekedwe a polima.
Vinyl Acetate vs. Ethylene Carbonate: Malingana ndi zofunikira zenizeni za ntchito, opanga angagwiritse ntchito ethylene carbonate m'malo mwa vinyl acetate. Ethylene carbonate yathandizira kukana madzi komanso kumamatira munyengo yachinyontho.
Acrylics: Ma polima a Acrylic, kuphatikiza ma acrylics oyera kapena copolymers, amagwiritsidwa ntchito polimbana ndi nyengo, kulimba, komanso kusinthasintha. Amadziwika kuti amapereka zomatira bwino ku magawo osiyanasiyana.
Chitetezo cha Colloid:
Hydroxypropyl methylcellulose (HPMC): HPMC ndi colloid yoteteza yomwe imagwiritsidwa ntchito mu RDP. Iwo bwino redispersibility wa polima particles ndi timapitiriza lonse zimatha ufa.
Polyvinyl alcohol (PVA): PVA ndi colloid ina yoteteza yomwe imathandizira kukhazikika ndi kubalalitsidwa kwa tinthu ta polima. Zimagwiranso ntchito pakuwongolera kukhuthala kwa ufa.
Plasticizer:
Dibutyl Phthalate (DBP): DBP ndi chitsanzo cha plasticizer yomwe nthawi zambiri imawonjezeredwa ku RDP kuti ikhale yosinthika komanso yosinthika. Zimathandiza kuchepetsa kutentha kwa galasi la polima, ndikupangitsa kuti zikhale zotanuka.
filler:
Calcium Carbonate: Zodzaza monga calcium carbonate zimatha kuwonjezeredwa kuti ziwonjezere kuchuluka kwa ufa ndikupereka njira yotsika mtengo yosinthira zinthu monga mawonekedwe, porosity ndi opacity.
Stabilizers ndi antioxidants:
Stabilizers: Izi zimagwiritsidwa ntchito poletsa kuwonongeka kwa polima panthawi yosungira ndi kukonza.
Antioxidants: Antioxidants amateteza polima ku kuwonongeka kwa okosijeni, kuonetsetsa moyo wautali wa RDP.
Ntchito za gawo lililonse:
Polymer base: Amapereka mawonekedwe opanga mafilimu, kumamatira, kusinthasintha komanso mphamvu zamakina pazomaliza.
Kuteteza colloid: kulimbikitsa redispersibility, bata ndi kubalalitsidwa kwa polima particles.
Plasticizer: Imakulitsa kusinthasintha komanso kusinthika.
Zodzaza: Sinthani zinthu monga mawonekedwe, porosity, ndi opacity.
Ma Stabilizers ndi antioxidants: Pewani kuwonongeka kwa polima panthawi yosungira ndi kukonza.
Pomaliza:
Redispersible polymer powder (RDP) ndi chinthu chosunthika komanso chofunikira pazomangira zamakono. Kapangidwe kake ka mankhwala, kuphatikiza ma polima monga EVA kapena ma acrylic resins, ma colloids oteteza, mapulasitiki, ma fillers, stabilizers ndi antioxidants, amapangidwa mosamala kuti akwaniritse zofunikira pakugwiritsa ntchito kulikonse. Kuphatikizika kwa zigawozi kumathandizira kukonzanso ufa, mphamvu zomangira, kusinthasintha komanso magwiridwe antchito onse mumipangidwe yowuma yosakaniza matope.
Nthawi yotumiza: Dec-18-2023