TPU na jerin Aliphatic

Aliphatic TPUs wani nau'in polyurethane ne na thermoplastic wanda ke nuna juriyar UV mai yawa, wanda hakan ya sa suka dace da amfani a waje inda ake damuwa da tsawon lokacin da ake ɗauka ana shan hasken rana.
Dangane da halayen sinadarai na abubuwan da ke cikin sinadarin lipid na diisocyanate, ana iya raba TPU zuwa ƙungiyoyin aromatic da aliphatic. Ƙamshi shine mafi yawan TPU da muke amfani da shi (ba ya jure wa rawaya ko tasirin rawaya ba shi da kyau, ba abinci ba ne), aliphatic gabaɗaya shine yin ƙarin samfuran high end. Misalan sun haɗa da na'urorin likitanci, kayan da ke buƙatar juriyar rawaya na dindindin, da sauransu.
Aliphatic kuma ya kasu zuwa polyester/polyeter.
Rarraba juriyar rawaya: Gabaɗaya ana kwatanta shi da katin launin toka, an raba shi zuwa matakai 1-5. Bayan gwajin juriyar tabo mai launin rawaya kamar Suntest, QUV ko wani gwajin fallasa rana, kwatanta canjin launi na samfurin kafin da bayan gwajin, mafi kyawun maki shine 5, wanda ke nufin babu canjin launi. 3 Ga waɗannan akwai canjin launi a bayyane. Gabaɗaya, 4-5, wato, ɗan canza launi, ya cika yawancin aikace-aikacen TPU. Idan ba kwa buƙatar canza launi kwata-kwata, gabaɗaya kuna buƙatar amfani da TPU na aliphatic, wato, abin da ake kira TPU mara rawaya, substrate ɗin ba MDI ba ne, gabaɗaya HDI ko H12MDI, da sauransu, kuma gwajin UV na dogon lokaci ba zai canza launi ba.