Mitsui Chemicals Inc, (MCI) and Prime Polymer Co Ltd plan to expand annual polypropylene compound production capacity to a combined annual total of 73,000 tons. This move will entail a capacity hike in North America, Thailand and China by 24%, to ensure MCI can respond to growing demand from the automotive sector. Combined with new 15,000 tons capacity in India, MCI plans to increase capacity by 29% to 88,000 tons within the next two years.