How to distinguish TPU material in elastomers? In the absence of testing instruments, we can use methods such as looking, smelling, and touching to identify whether this material is TPU.
The easiest way is to use a lighter to ignite the product, and when the flame comes into contact with the product, it will react. In the first 2 seconds, the product starts to melt, there will be bubbles, and slowly, the melted part starts to turn black, some turn caramel, some turn black, and there is black smoke. At this time, smell it, because TPU is a polymer, there must be polyol in it, and when the polyol burns, the smell of ethanol will appear, that is, there is a fragrance, and people who have no problem with their sense of smell can generally smell it.
If the above 3 processes occur, it can basically be judged that it is TPU material, of course, it is not necessarily. Finally, you can try whether the melted substance can be pulled out.
