First of all, the biggest difference between PVC and TPU is that they belong to different categories. PVC material is cheaper than TPU material. The full name of PVC is Polyvinyl chloride, which was once the largest general-purpose plastic in the world. The full name of TPU is Thermoplastic polyurethanes, which belongs to the rubber category.
How to distinguish PVC and TPU? There are three commonly used methods: Observe hardness / elasticity / burnt ashes:
1. Hardness
You can put PVC and TPU in the frozen layer of refrigerator. After freezing, the TPU is still soft, the PVC would be harder than before.
2. Elasticity
The biggest external performance of PVC and TPU lies in the rebound elasticity. The same long strip after extension, on the one hand, TPU strip can be stretched to twice its length, PVC strip basically cannot be stretched and will be broken. On the other hand, TPU can bounce back, while PVC basically can't.
3. The ashes after burning: (We have testing video of TPU and PVC, welcome to watch.)
The PVC is solid which is in black color and hard, when it’s completely burned.
When TPU is burning, it drips as a liquid which is in faint yellow, It becomes solid after cooling, but still soft.
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