Eng nge a nih PU .

PU (Polyurethane) hi synthetic material a ni a, industry hrang hrangah hman a ni nasa hle a, chung zingah chuan construction, automotive, furniture, leh packaging te pawh a tel. Physical property hrang hrang, durability, flexibility, leh thermal resistance te pawh huam tel thei tur versatile material a ni a, a siam theih a ni. PU hi a tlangpuiin polyol chu catalyst leh additive dang awmnaah isocyanate nen an inrem thin. Chumi atanga lo chhuak polymer chuan a backbone ah urethane linkage a nei a, chu chuan a characteristic property a pe a ni. PU hi a crosslinking state a zirin thermosetting emaw thermoplastic emaw tiin an then fo thin. Thermosetting PU hian three-dimensional network structure a nei a, chu chu melt leh remolded theih a ni lo va, thermoplastic PU erawh chu melt leh remolded theih a ni thung. PU hi a chhe thei lo, a elasticity, leh oils, solvents, leh abrasion a do theih avangin thlan a ni fo thin. A hman dan azirin soft leh rubbery emaw hard leh rigid emaw a siam theih bawk.