Asahi Kasei Corp. (TYO:3407) has raised the prices for its Tuftec and S.O.E. hydrogenated styrenic thermoplastic elastomer products to 25 yen ($0.24) or more per kilo, starting with November 16 shipments. The chemicals manufacturer said that the price hike is due to manufacturing cost increases far beyond the range it can cover through its own cost-cutting efforts, being necessary then…