Evaporated Natural Rubber Latex Concentrate

Manufacturer: Why is the viscosity of evaporated latex concentrate higher than that of centrifuged latex concentrate at the same total solid content.

John Woon (Senior Latex Consultant): When field latex is concentrated using only the evaporation process, no separation occurs as in the case of centrifuging. Hence, it retains all the fine rubber particles which are normally removed in the serum of the centrifuging process.

As a result, the average particle size of evaporated latex concentrate is very much lower than that of the centrifuged latex. This accounts for it's higher viscosity.