October 5, 2007 - TPE says exports have ebbed from summer highs but are still strong, with the falling dollar discounting U.S. resin further. Polypropylene (PP) trading volume was good with higher prices, as refinery grade propylene rose $0.02/lb, with polymer-grade propylene up $0.04/lb. In polystyrene (PS), trading volume was light with higher prices, as the spot market rose $0.015/lb.