POLYPHENYLENE SULFIDE (PPS)

The number of producers of polyphenylene sulfide (PPS) has increased from one to six since 1987; of that, four are in Japan, one in the U.S.A. and one in Europe. This led inevitably to a larger market penetration and a considerable widening of the variety of products for injection molding and extrusion compounds as well as for composites and their application. The first molding compounds were based on branched PPS, which can be made with different viscosities. That way, it was possible to considerably increase not only the mechanical strength of parts made from such molding compounds, but also their toughness to an even greater degree. Further progress was made in the purity, color and the stability during processing.