Avient Corporation will complete an expansion of existing production capabilities for color concentrates at its Binh Duong site in Vietnam by next month.    The move will improve speed-to-market and service level for local customers seeking unique color solutions to enhance the aesthetics and appeal of high-quality end products.   “Demand for plastics has become one of the Vietnam economy’s fastest growth areas,” said Say-Eng Lee, VP and GM, Color & Additives Asia for Avient. “As con...