Synthetic rubber manufacturer Zeon Corp. (TYO:4205) has posted increasing profits on falling revenues for its rubber business over the April–December period for fiscal 2017. The company’s sales volume over the period declined 5 percent year-on-year, sitting at 224,000 tons. General-purpose rubber for tires declined 10 percent domestically on account of a lowered utilization rate among tire manufacturers. Coupled with overseas...