TPU ya filimu yagalasi yomatira/filimu yomatira yagalasi

Ma TPU a Aliphatic ndi mtundu winawake wa polyurethane wopangidwa ndi thermoplastic womwe umakhala ndi kukana kwakukulu kwa UV, zomwe zimapangitsa kuti ugwiritsidwe ntchito panja pomwe umakhala ndi nkhawa nthawi yayitali padzuwa.

AMalinga ndi mphamvu ya mankhwala a zigawo za diisocyanate lipid, TPU ikhoza kugawidwa m'magulu a aromatic ndi aliphatic. Aromatic ndiye TPU yodziwika kwambiri yomwe timagwiritsa ntchito (yosagonjetsedwa ndi chikasu kapena chikasu sichili bwino, sichili bwino pa chakudya), aliphatic nthawi zambiri imagwira ntchito pazinthu zapamwamba kwambiri. Zitsanzo zimaphatikizapo zida zamankhwala, zipangizo zomwe zimafuna kukana chikasu kosatha, ndi zina zotero.

ALiphatic imagawidwanso mu polyester/polyether.

Kugawa kwa kukana kwachikasu: Kawirikawiri kumayerekezeredwa ndi khadi la imvi, logawidwa m'magawo 1-5. Pambuyo pa mayeso achikasu okana kukana monga Suntest, QUV kapena mayeso ena okhudzana ndi dzuwa, yerekezerani kusintha kwa mtundu wa chitsanzocho musanayambe komanso mutatha mayesowo, giredi yabwino kwambiri ndi 5, zomwe zikutanthauza kuti palibe kusintha kwa mtundu. 3 Izi ndi kusintha koonekeratu kwa mtundu. Kawirikawiri, 4-5, ndiko kuti, kusintha pang'ono kwa mtundu, kwakwaniritsa ntchito zambiri za TPU. Ngati simukufuna kusintha konse, nthawi zambiri muyenera kugwiritsa ntchito aliphatic TPU, ndiko kuti, yotchedwa non-yellowing TPU, substrate si non-MDI, nthawi zambiri HDI kapena H12MDI, ndi zina zotero, ndipo mayeso a UV a nthawi yayitali sadzasintha mtundu.