Shriram Plast Manufacturing Industry In the last few decades, plastic industry has grown to become India's one of the leading sectors with a sizable base. Since 2010, which witnessed a promising beginning with the production of polystyrene, plastic products have gained notable importance in different spheres of activity with an ever increasing per capita consumption. With continuous advancements and developments in polymer technology, processing machinery, and cost effective manufacturing, plastic is fast replacing the typical materials in different segments.