Ufa wa polima wosungunuka (RDP) ndi wosakaniza wovuta wa ma polima ndi zowonjezera zomwe zimagwiritsidwa ntchito kwambiri popanga zinthu zomangira, makamaka popanga ma mortar osakaniza ndi madzi. Ufa uwu umagwira ntchito yofunika kwambiri pakukweza magwiridwe antchito ndi makhalidwe a zipangizo zosiyanasiyana zomangira monga zomatira za matailosi, ma grout, zinthu zodziyimira pawokha komanso ma plaster a simenti.
Zigawo zofunika:
Maziko a polima:
Ethylene vinyl acetate (EVA): EVA copolymer imagwiritsidwa ntchito kwambiri mu RDP chifukwa cha mawonekedwe ake abwino kwambiri opangira filimu, kumatira, komanso kusinthasintha. Kuchuluka kwa vinyl acetate mu copolymer kumatha kusinthidwa kuti kusinthe mawonekedwe a polima.
Vinyl Acetate vs. Ethylene Carbonate: Kutengera ndi zofunikira za ntchitoyo, opanga angagwiritse ntchito ethylene carbonate m'malo mwa vinyl acetate. Ethylene carbonate yakhala ndi kukana bwino madzi komanso kumamatira bwino m'malo okhala ndi chinyezi.
Ma Acrylic: Ma polima a acrylic, kuphatikizapo ma acrylic oyera kapena ma copolymer, amagwiritsidwa ntchito chifukwa cha kukana kwawo nyengo, kulimba, komanso kusinthasintha kwawo. Amadziwika kuti amamatira bwino kwambiri kuzinthu zosiyanasiyana.
Colloid yoteteza:
Hydroxypropyl methylcellulose (HPMC): HPMC ndi colloid yoteteza yomwe imagwiritsidwa ntchito kwambiri mu RDP. Imathandizira kuti tinthu ta polima titha kufalikiranso komanso imawonjezera mphamvu zonse za ufa.
Mowa wa polyvinyl (PVA): PVA ndi colloid ina yoteteza yomwe imathandiza kukhazikika ndi kufalikira kwa tinthu ta polima. Imagwiranso ntchito polamulira kukhuthala kwa ufa.
Chopangira pulasitiki:
Dibutyl Phthalate (DBP): DBP ndi chitsanzo cha pulasitiki yomwe nthawi zambiri imawonjezeredwa ku RDP kuti iwonjezere kusinthasintha ndi kusinthasintha. Imathandiza kuchepetsa kutentha kwa kusintha kwa galasi la polima, ndikupangitsa kuti ikhale yotanuka kwambiri.
chodzaza:
Calcium Carbonate: Zodzaza monga calcium carbonate zitha kuwonjezeredwa kuti ziwonjezere ufa wambiri ndikupereka njira yotsika mtengo yosinthira zinthu monga kapangidwe, ma porosity ndi opacity.
Zokhazikika ndi zoteteza ku matenda:
Zokhazikika: Izi zimagwiritsidwa ntchito poletsa kuwonongeka kwa polima panthawi yosungira ndi kukonza.
Ma antioxidants: Ma antioxidants amateteza polima kuti isawonongeke ndi okosijeni, zomwe zimapangitsa kuti RDP ikhale ndi moyo wautali.
Ntchito za gawo lililonse:
Maziko a polima: Amapereka mphamvu zopangira filimu, kumatira, kusinthasintha komanso mphamvu yamakina ku chinthu chomaliza.
Colloid yoteteza: Imawonjezera kufalikira, kukhazikika, komanso kufalikira kwa tinthu ta polima.
Chopangira pulasitiki: Chimathandiza kusinthasintha komanso kusinthasintha.
Zodzaza: Sinthani mawonekedwe monga kapangidwe, ma porosity, ndi kutseguka.
Zokhazikika ndi zoteteza ku ma antioxidants: Zimaletsa kuwonongeka kwa polima panthawi yosungira ndi kukonza.
Pomaliza:
Ufa wa polymer wosungunuka (RDP) ndi chinthu chogwiritsidwa ntchito m'njira zosiyanasiyana komanso chofunikira kwambiri pa zomangamanga zamakono. Kapangidwe kake ka mankhwala, kuphatikizapo ma polima monga EVA kapena acrylic resins, ma colloids oteteza, ma plasticizer, ma filler, okhazikika ndi ma antioxidants, amapangidwa mosamala kuti akwaniritse zofunikira pa ntchito iliyonse. Kuphatikiza kwa zigawozi kumathandiza kukonza kusungunuka kwa ufa, mphamvu yomangira, kusinthasintha komanso magwiridwe antchito onse mu mapangidwe a dry mix mortar.
Nthawi yotumizira: Disembala 18-2023