How to identify TPU recycled materials? Renewable materials are usually recycled chemical products produced by a particular means of processing, manufacturing various types of products corresponding to the different product demand, renewable materials properties are not the same, so you can use recycled materials manufacturing different products, because the world resources, with more and more people recycled materials, recycled materials are more and more manufacturers favor and use.
　　
　　First, look at the brightness of the surface;
　　
　　Second, look at whiteness, not just look at the surface, but also the section whiteness.
　　
　　Third, look hardness, with the teeth bite, we know that good ingredients are hard, too soft a description impure.
　　
　　Fourth, the look is not submerged, the meaning here is to look at the amount of powder, recycled materials in general, there will be more or less powder, because lately is not very pure materials, and if additionally powder, it will not sink in water .