Synthetic rubber manufacturer JSR Corp. (TYO:4185) has posted sales of 122.26 billion yen ($1.1 billion) for the first quarter of fiscal 2018, up 20.9 percent from the same quarter last year. Meanwhile, the company’s operating profit was down 9.6 percent year-on-year to 11.48 billion yen, with its net profit falling 5.4 percent to 8.94 billion yen. Sales at JSR’s elastomers…