Biodac a Blend of Cellulose and Mineral Fillers

The principal mineral components of Biodac are calcium carbonate—in the form of precipitated calcium carbonate (PCC) or ground calcium carbonate (GCC)—that typically constitutes 20% and up to 75% of dry sludge content, and clay. These two minerals are typically loaded into paper as a coating and tiller to improve the mechanical characteristics as well as the appearance of paper. The resulting papermaking sludge, particularly mixed office paper sludge, consists primarily of two major components, that are fiber and minerals finely mixed with each other. 

COMPOSITION OF WOOD-PLASTIC COMPOSITES MINERAL FILLERS 

Under the microscope, Biodac appears as small rocks attached to cellulose fibers and bundled into granules. Because of short cellulose fibers on the surface of Biodac , the filler provides a mechanical adhesion (interlocking) with the plastic matrix without any surface treatment. The thermal expansion-contraction coefficient of Biodac appears to be much closer to that of plastics, compared to the coefficients of common mineral fillers. Hence, the bond between Biodac and the plastic after weathering of the composite material becomes loose at lesser extent compared to inorganic fillers. 

The following properties of Biodac -filled LDPE can be considered advantageous compared to those of CaCOs- or talc-filled LDPE  

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