SMA addition speeds molding of PBT

Plastic additives supplier Sartomer Co. (Exton, PA) says tests have shown that its styrene maleic anhydride (SMA) 1000 can modify the melt flow of polybutadiene terephthalate (PBT) in mixtures, enabling greater flexibility in part design. Adding SMA may lead to thinner, more complex mold designs, more intricate flow paths, and fewer gates.