Zeon Corp. (TYO:4205), a major manufacturer of specialty synthetic rubber, has reported that net sales for the company’s elastomer materials business declined by 5 percent year on year to 178.9 billion yen ($1.61 billion) for the fiscal year ending March 2016. Meanwhile, operating profit for the segment climbed 23 percent to 20.7 billion yen. Sales volume for synthetic rubber rose…