Percolating structures formed by three-dimensional chaotic mixing among carbon black particles in polystyrene. Additive concentration that is required to render plastics electrically conducting is reduced.  Various types of distributions among solid additives can be formed.

Reference: R. I. Danescu and D. A. Zumbrunnen, "Production of Electrically Conducting Plastic Composites by Three-Dimensional Chaotic Mixing of Melts and Powder Additives," Journal of Vinyl Additive Technology, Vol. 6, pp. 27-33, 2000.