PU系统
-软 : For high resilience flexible slab-foam / For high hardness flexible slab-foam / For flexible hot mold foam / For ordinary high resilience flexible mold foams / High Ball Rebound System
-硬 : YHD-500 / YHD-310 / YHD-640 / YK-700S / YMI-300
-半硬 : For ordinary semi-rigid foams / System for Integral skinned foams / For semi-rigid foams