Survey of Casumina (Casumina) shows that a lot of Malaysian rubber SMR 10/20 as there is a very small fluctuations of the technical indicators (Po-RRI) and mooney viscosity (from 3-5%) [1], it is very useful for the production of synthetic rubber-products-molding shaping, even high product, reducing the rate of defects. So why in while Vietnam is one of the countries exporting the largest natural rubber in the world that manufactures tires of Vietnam must import rubber from neighbouring countries? That is because the quality of natural rubber in our country still has some problems that make the tricky business of manufacturing, blending in latex phenomenon impurities before selling the plant still occur in many places.
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