Sidistar® in foamed thermoplastics

Nucleating effect

Due to the fact that Sidistar® can be dispersed down to primary particles the material has a nucleating effect. It allows to produce a more uniform foam (closed cells), with smaller “bubbles”, this gives better strength as well as a greatly improved surface. E.g. a rigid, chemically foamed PVC, will become more uniform even when adding quite moderate amounts of Sidistar®. As the foam flows out of the extruder and the PVC is cooled, all gas filled cells will shrink, creating tiny dimples at the surface.  Sidistar® as a nucleating agent, will ensure that the foaming takes place in more places at the same time. By creating smaller cells with a more homogenous size throughout the material one obtain a reduction of the specified gravity of the final product.