Last week, Sonoco raised the prices of recycled paperboard effective with shipments on or after Jul 17, owing to the constant rise in raw material costs due to increased demand. Sonoco underperformed the Zacks classified Containers-Paper/Plastic sub-industry with respect to price performance over the past one year, mainly due to raw material cost inflation and slowdown in manufacturing. Sonoco Alcore S.a.r.l., a wholly owned subsidiary of Sonoco Products Co.SON , has announced that it will again raise prices for paper-based tubes and core in Europe.