M'zaka zaposachedwa, motsogozedwa ndi malamulo oteteza zachilengedwe komanso kulimbikitsa ambirizokutiraopanga, madzikunyamulautoto wakhala ukudziwika kwambiri ndi msika, ndipo ntchito ya penti yopangidwa ndi madzi awiri yakhala ikufanana ndi utoto wopangidwa ndi mafuta m'zinthu zambiri, zomwe sizingasiyanitsidwe ndi chitukuko ndi kugwiritsa ntchitozamadzi PUwothandizira.
Bogao ndiaterbornePUwothandiziraMtengo wa BG-2655-80,fkapena zokutira zokhala ndi madzi, zomatira zamadzi, inki zamadzi, etc.
Zili chonchoamagwiritsidwa ntchito ngati machiritso a zigawo ziwiri zamadziPUdongosolo.
Iwo ali makhalidwe a Paint filimu kudya kuyanika, kwambiri thupi ndi mankhwala katundu.
PU yochiritsa m'madzi imakhala ndi magulu ambiri a isocyanate (- NCO), omwe amatha kulumikizidwa ndi magulu ambiri ogwira ntchito monga magulu a hydroxyl, amino ndi carboxyl. Momwe mungadziwire bwino zomwe zimachitika ndikukonzekera mbali ziwiri zamadzimadzi utoto ndi ntchito yabwino kwambiri zimafuna kusankha njira yoyenera yothira madzi, ndikuzindikira mfundo zazikulu za kapangidwe kake ndi kukonzekera filimu mwatsatanetsatane.
Kafukufuku wogwiritsa ntchito wothira madzi a PU adayamba kumapeto kwa zaka za m'ma 1980. Bayer yakhala patsogolo pa kafukufuku ndi chitukuko, ndipo yathandiziranso kulimbikitsa machiritso opangidwa ndi madzi ndi utoto wamadzi. Zinayamba mochedwa ku China, koma zakula mofulumira, ndipo zimagwiritsidwa ntchito kwambiri mu zokutira mafakitale, zokutira pansi, zokutira matabwa, makampani magalimoto, mafakitale nsalu ndi zina.
- Ntchito mu zokutira mafakitale
Madzi ochiritsira a PU amafananizidwa ndi utomoni wa hydroxyl dispersion resin. Chifukwa dispersion ya hydroxyl imakhala ndi kulemera kwa mamolekyu ang'onoang'ono, mtengo wa hydroxyl wapamwamba ndipo palibe chowonjezera, imakhala ndi kachulukidwe kwambiri, kuuma kwakukulu, kuwala kwabwino komanso kukana bwino pambuyo podutsana ndi kuchiritsa. Zitha kufananizidwa kwathunthu ndi zokutira zokhala ndi mafuta pakuchita, ndipo zitha kugwiritsidwa ntchito kwambiri mumakampani odana ndi dzimbiri komanso zokutira zokongoletsa.
- Ntchito mu zokutira pansi
PU yokhala ndi magawo awiri amadzi❖ kuyanika amagwiritsidwa ntchito pansi pa madzi, omwe ali ndi makhalidwe oteteza chilengedwe ndi thanzi. WamadziPU❖ kuyanika ali ndi makhalidwe a kusinthasintha mkulu, kukana kuvala, kukana nyengo, kukana madzi ndi zabwino zikande kukana.
- Kugwiritsa ntchito mu Wood Coatings
Utoto wamtengo wapamwamba wa matte wopangidwa ndi madzi ndi njira yopangira mipando. Filimu ya penti imapereka kumverera kwabwino kwapangidwe pambuyo pa kutha, ndipo ndi yotchuka kwambiri ndi anthu. Chophimba cha varnish chomwe chimawonjezeredwa ndi wopangira matting chimakhala chowonekera pang'ono komanso kukana kwapakati. Zotsatira za matting zitha kupezedwa kudzera mu mankhwala ochiritsira kuchokera kumapangidwe a maselo. Mtundu womwewo wa utoto wamadzi, wokhala ndi mawonekedwe osiyanasiyana a matte wochiritsa, ukhoza kupeza gloss yomwe tikufuna.
Nthawi yotumiza: Feb-17-2023