Tsarin Aliphatic TPU

Aliphatic TPUs wani nau'i ne na musamman na polyurethane na thermoplastic wanda ke nuna babban juriya na UV, yana sa su dace da aikace-aikacen waje inda tsayin daka ga hasken rana yana da damuwa.
Dangane da kaddarorin sinadarai na abubuwan haɗin lipid diisocyanate, ana iya raba TPU zuwa ƙungiyoyin aromatic da aliphatic. Aromatic shine mafi yawan TPU da muke amfani dashi (ba mai jurewa ga rawaya ko tasirin rawaya ba shi da talauci, ba ƙimar abinci ba), aliphatic shine gabaɗaya don yin ƙarin samfuran ƙarshe. Misalai sun haɗa da na'urorin likitanci, kayan da ke buƙatar juriya mai launin rawaya, da sauransu.
Aliphatic kuma an raba shi zuwa polyester/polyether.
Rarraba juriya na rawaya: Gabaɗaya ana kwatanta shi da katin launin toka, an raba shi zuwa matakan 1-5. Bayan gwajin juriya na rawaya kamar Suntest, QUV ko wasu gwajin fallasa rana, kwatanta canjin launi na samfurin kafin da bayan gwajin, mafi kyawun sa shine 5, wanda ke nufin ainihin babu canjin launi. 3 Wadannan su ne bayyanannen launin fata. Gabaɗaya, 4-5, wato, ɗan canza launin, ya sadu da yawancin aikace-aikacen TPU. Idan ba ku buƙatar canza launi kwata-kwata, gabaɗaya kuna buƙatar amfani da TPU aliphatic, wato, abin da ake kira TPU mara rawaya, madaidaicin ba MDI ba ne, gabaɗaya HDI ko H12MDI, da sauransu, da gwajin UV na dogon lokaci. ba zai canza launi ba.