Kodi Redispersible Emulsion Powder ndi chiyani?

Redispersible emulsion powder (RDP), yomwe imadziwikanso kuti redispersible polima ufa, ndi mawonekedwe a ufa wa emulsion polima wamadzi. Nthawi zambiri amapangidwa ndi kupopera poyanika chisakanizo cha polima dispersion, nthawi zambiri zochokera vinyl acetate-ethylene (VAE) kapena vinyl acetate-versatile (VAC/VeoVa) copolymers, ndi zina zosiyanasiyana monga zoteteza colloids, surfactants, ndi plasticizers.

Umu ndi momwe ufa wa emulsion wopangidwanso umapangidwira komanso mawonekedwe ake ofunikira:

Ndondomeko Yopanga:

1. Polymer Emulsion: Emulsion ya polima imakonzedwa ndi ma polymerizing monomers monga vinyl acetate, ethylene, ndi ma comonomers ena pamaso pa madzi ndi emulsifiers. Izi zimabweretsa kupanga tinthu ting'onoting'ono ta polima tomwazika m'madzi.
2. Zowonjezera Zowonjezera: Zowonjezera monga zoteteza ma colloids, ma surfactants, ndi mapulasitiki amatha kuwonjezeredwa ku emulsion kuti asinthe katundu ndi ntchito yake.
3. Utsi Kuyanika: The polima emulsion ndiye kudyetsedwa mu chowumitsira kupopera, kumene atomized mu madontho abwino ndi zouma ntchito mpweya wotentha. Madzi akamasanduka nthunzi, tinthu tating'onoting'ono ta polima timapanga, zomwe zimapangitsa kuti pakhale ufa wosasunthika.
4. Kusonkhanitsa ndi Kuyika: Ufa wowuma umasonkhanitsidwa pansi pa chowumitsira kupopera, sieved kuchotsa tinthu tating'onoting'ono tomwe timapanga, kenaka amapakidwa kuti asungidwe ndi kunyamula.

Zofunika Kwambiri:

1. Tinthu Kukula: Redispersible emulsion ufa zambiri tichipeza ozungulira particles ndi diameters kuyambira ma micrometers angapo kuti makumi micrometers, malinga enieni kupanga ndondomeko ndi chiphunzitso.
2. Madzi Redispersibility: Chimodzi mwazinthu zofunika kwambiri za RDP ndikutha kufalikiranso m'madzi kuti apange emulsion yokhazikika ikasakanizidwa ndi madzi. Izi zimalola kuphatikizika kosavuta m'mapangidwe otengera madzi monga matope, zomatira, ndi zokutira.
3. Polima: RDP nthawi zambiri imakhala ndi zinthu zolimba za polima, zomwe zimayambira pa 50% mpaka 80% polemera, kutengera mtundu wa polima komanso kapangidwe kake.
4. Kapangidwe ka Chemical: Kapangidwe kakemidwe ka RDP kumasiyana malinga ndi mtundu wa polima womwe umagwiritsidwa ntchito ndi zina zowonjezera zomwe zimaphatikizidwa panthawi yopanga. Ma polima omwe amagwiritsidwa ntchito mu RDP amaphatikizapo vinyl acetate-ethylene (VAE) copolymers ndi vinyl acetate-versatile (VAC/VeoVa) copolymers.
5. Kagwiridwe Ntchito: RDP imapereka zinthu zingapo zofunika kuzipangidwe, kuphatikiza kumamatira bwino, kusinthasintha, kusagwira madzi, komanso kulimba. Imakulitsa magwiridwe antchito, mphamvu zamakina, ndi magwiridwe antchito azinthu zosiyanasiyana zomangira monga matope, zomatira matailosi, ma renders, ndi zodzipangira zokha.

Mwachidule, redispersible emulsion powder (RDP) ndi ufa wosiyanasiyana wa ma polima opangidwa ndi emulsion omwe amagwiritsidwa ntchito ngati zowonjezera pomanga ndi mafakitale osiyanasiyana. Kuthekera kwake kufalikiranso m'madzi, zomwe zili ndi polima zambiri, komanso magwiridwe antchito abwino zimapangitsa kuti ikhale yofunika kwambiri popanga zida zomangira zapamwamba komanso zolimba.