1. Look at the color of the original rubber. It will become gray-brown when stretched, and the reclaimed rubber will appear black, and will not change color no matter how stretched.
2. Smell the original rubber has no peculiar smell, and the reclaimed rubber has a strong smell of rubber or some additives.
3. Burning is also one of our most common methods. Only by cutting a small piece of his damping board and burning it with a lighter can we know the authenticity of the material. The raw rubber burns slowly, does not emit smoke, and does not have a peculiar smell. White-gray, and inferior materials such as recycled rubber and asphalt not only burn fast, but also drip black liquid.
I hope these three points can effectively help everyone and can roughly distinguish the quality of sound insulation cotton.
Post time: Sep-17-2021