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How to distinguish TPU?

Origin:    Date:2017-03-15

Recently, plastic products are more and more in our life. Some plastic is toxic while others is eco-friendly. As we know, TPU is one of eco-friendly plastic and which in different degrees has different property. In contrast, silica gel and synthetic rubber are not as eco-friendly as TPU, though they has similar property.
Here we have some ways to distinguish TPU, silica gel and synthetic rubber.


  1. Clear or colored.
  2. Has yellow flame, a little explosion, few white smoke when fire. It can also have black smoke when it’s not fully fire sometimes.
  3. A little bit fragrance.
  4. Range of hardness is 60A-80D.
Silica gel:

  1. Has bright white flame when fire.
  2. A little bit smell and smoke when fire. The residue after fire is white powder.
  3. Range of hardness is 10A-90A.
Synthetic rubber:

  1. The firing flame is yellow.
  2. Smelly when fire.
  3. Range of harness is generally 50A-80A.

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