Powder ea Emulsion e Hlahang ke Eng?

Redispersible emulsion powder (RDP), eo hape e tsejoang e le redispersible polymer powder, ke mofuta o phofshoana oa emulsion polymer ea metsi. Hangata e hlahisoa ka ho omisa motsoako oa polymer dispersion, hangata e thehiloeng ho vinyl acetate-ethylene (VAE) kapa vinyl acetate-versatile (VAC/VeoVa) copolymers, e nang le li-additives tse fapaneng tse kang li-colloid tse sireletsang, li-surfactants, le li-plasticizers.

Mona ke kamoo phofo ea emulsion e ka sebelisoang hape e hlahisoang le litšobotsi tsa eona tsa bohlokoa:

Mokhoa oa Tlhahiso:

1. Polymer Emulsion: Emulsion ea polymer e lokisoa ka polymerizing monomers tse kang vinyl acetate, ethylene, le li-comonomer tse ling ka pel'a metsi le li-emulsifiers. Ts'ebetso ena e etsa hore ho be le likaroloana tse nyane tsa polymer tse hasantsoeng ka metsing.
2. Keketso ea Li-additives: Li-additives tse kang li-colloid tse sireletsang, li-surfactants le li-plasticizers li ka kenyelletsoa ho emulsion ho fetola thepa le ts'ebetso ea eona.
3. Spray Drying: Emulsion ea polymer e feptjoa ka har'a setsi sa ho omisa, moo e kenang ka har'a marotholi a matle ebe e omisoa ka moea o chesang. Ha metsi a ntse a fetoha mouoane, likaroloana tse tiileng tsa polymer li theha, e leng se hlahisang phofo e sa lefelloeng.
4. Pokello le Pakete: Phofo e omisitsoeng e bokelloa ho tloha ka tlaase ho se omisang spray, e sefshoa ho tlosa likaroloana leha e le life tse kholo, ebe e phutheloa bakeng sa ho bolokoa le ho tsamaisoa.

Litšobotsi tsa Bohlokoa:

1. Boholo ba Particle: Redispersible emulsion powder ka tloaelo e na le likaroloana tse chitja tse nang le bophara ba li-micrometer tse seng kae ho isa ho tse mashome a li-micrometer, ho itšetlehile ka mokhoa o itseng oa tlhahiso le tlhahiso.
2. Metsi Redispersibility: E 'ngoe ea litšobotsi tsa bohlokoa ka ho fetisisa tsa RDP ke bokhoni ba eona ba ho qhala hape ka metsing ho etsa emulsion e tsitsitseng ha e kopane le metsi. Sena se lumella ho kenngoa habonolo mefuteng e thehiloeng metsing e kang seretse, li-adhesives, le liphahlo.
3. Likahare tsa Polymer: RDP ka kakaretso e na le litaba tse ngata tsa polymer solids, hangata ho tloha ho 50% ho isa ho 80% ka boima ba 'mele, ho latela mofuta o itseng oa polima le sebopeho.
4. Sebopeho sa Lik'hemik'hale: Sebopeho sa lik'hemik'hale sa RDP se fapana ho latela mofuta oa polymer e sebelisitsoeng le li-additives tse ling tse kenyelletsoeng nakong ea tlhahiso. Li-polymer tse tloaelehileng tse sebelisoang ho RDP li kenyelletsa li-copolymers tsa vinyl acetate-ethylene (VAE) le li-copolymers tsa vinyl acetate-versatile (VAC/VeoVa).
5. Thepa ea Ts'ebetso: RDP e fana ka mefuta e mengata ea lintho tse lakatsehang ho litlhophiso, ho kenyeletsoa ho khomarela ho ntlafalitsoeng, ho tenyetseha, ho hanyetsa metsi, le ho tšoarella. E matlafatsa ts'ebetso, matla a mochini, le ts'ebetso ea lisebelisoa tse fapaneng tsa kaho joalo ka seretse, likhomaretsi tsa lithaele, li-renders le metsoako ea ho ikemela.

Ka kakaretso, redispersible emulsion powder (RDP) ke mofuta o fapaneng oa phofshoana oa li-polymers tse thehiloeng metsing tse sebelisoang e le li-additives mesebetsing e fapaneng ea kaho le ea indasteri. Bokhoni ba eona ba ho qhalakana hape ka metsing, li-polymer tse phahameng, le thepa ea ts'ebetso e lakatsehang li e etsa karolo ea bohlokoa ho thehoeng ha thepa ea moaho ea boleng bo holimo le e tšoarellang.