Tokyo, Sept. 10 (Jiji Press)--Mitsui Chemicals Inc., Idemitsu Kosan Co. and Sumitomo Chemical Co. said Wednesday that they have reached a basic agreement to integrate their polyolefin operations in April 2026. Through the step, the three Japanese companies aim to rationalize production of polyolefin, a type of plastic, in response to a worsening of the market due to overproduction by Chinese...