1. Appearance. The appearance requirements of the finished product are not significantly different from the standard samples. The length of the particles is between 4 and 8 mm. There are no three particles in the particles, no fragments, no foreign matter and impurities, and no undispersed aggregates and colloids.
2. Sulfur content. The sulfur content of the pre-dispersed rubber additive mainly represents the content of the active component in the product, and only a part of the product needs to be determined.