Injection of a component, such as an inlet branch pipe, must be divided into two or more parts for injection molding and then assembled, or it can be produced using an expensive coreless injection molding method. The same part, when using the blow molding method, can be completed and put into use in a single production operation.

When using blow molding, the mix must not only be able to be extruded into a parison of sufficient length, but must also maintain good melt strength over the length of the parison. The new PPS blow molding compound has been successfully used to make 20 inch long parts. It has been able to blow parts with a wall thickness of 0.17 inches without cracking.

For a mix containing 30% glass filler, the blow molding grade has the same properties as an injection molding grade containing 30% glass filler: heat resistance; chemical resistance; resistance to automotive fluids such as engine coolant, brake fluid, engine oil Corrosive properties such as gasoline, etc.; high ratio of strength to weight; specific gravity 40% lower than aluminum.

Like PPS blends, blown-grade blends are generally flame-retardant materials that are UL VO/5V rated. The oxygen index required to maintain its flame is also high, at 48%.