Chigawo chimodzi cha polyurethane chotchingira madzi ndi chotchingira chomwe chimapangidwira kuti chiteteze bwino madzi pamitundu yosiyanasiyana.Izi ndi zina mwazinthu zazikulu ndi mawonekedwe a zokutira zotere:
1. Kusavuta kugwiritsa ntchito
Chimodzi mwazabwino zazikulu za zokutira zopanda madzi za polyurethane ndi gawo limodzi ndizosavuta kugwiritsa ntchito.Utoto uwu ukhoza kugwiritsidwa ntchito ndi burashi kapena chodzigudubuza ndipo umauma mofulumira, kuti ukhale wabwino kwa mapulojekiti omwe amafunika kutha msanga.
2. Kuchita bwino kwambiri kwa madzi
Chinthu china chofunika kwambiri cha chigawo chimodzi cha polyurethane chotchingira madzi ndi chakuti chimapereka chitetezo chabwino kwambiri cha madzi.Chophimbacho chikhoza kugwiritsidwa ntchito pa malo osiyanasiyana, kuphatikizapo madenga, makoma ndi pansi, kuteteza madzi kuti asalowe ndikuwononga.
3. Chokhalitsa
Chigawo chimodzi cha polyurethane chotchingira madzi ndi cholimba kwambiri komanso chisankho chabwino kwambiri m'malo omwe amawonekera ndi zinthu.Chophimbacho chimatsutsana ndi kuwala kwa UV ndipo chimatha kupirira kutentha kwambiri, kumapangitsa kuti chigwiritsidwe ntchito m'malo ovuta.