1. PU bottom, cut a small piece to ignite, the flame is stable without green edges, and there is melting and dripping.

2, PVC bottom, cut a small piece, ignite the flame beat with green edge, self-extinguishing from the fire.

3, EVA bottom, cut a small piece to ignite, there is a burning smell of candles and melting and dripping.

4, the rubber sole, cut a small piece to ignite, there is a burnt smell of the tire, there is black smoke.

5, TPR bottom, cut a small piece, ignite the flame, the burning part is molten, not extinguished from the fire, soluble in the stupid