For bio-fillers, better reinforcement was frequently found when the aqueous dispersion of bio-filler is mixed with rubber latex
instead of direct compounding of bio-fillers with rubber in a thermal mechanical process because they do not disperse well
in such process. For renewable rubber composites, NR latex is a major source of renewable rubber and the same drying process
for drying natural rubber (NR) latex can be used after the latex is mixed with the dispersion of bio-filler particles. NR,
mostly cis-1,4-polyisoprene capable of strain-induced crystallization, has good mechanical properties. NR also contains up to