POLYSTYRENE RESIN FOAMED SHEET AND METHOD FOR MANUFACTURING THE SHEET

摘要

PROBLEM TO BE SOLVED: To provide a polystyrene resin foamed sheet which has its aging period shortened and secondary foaming properties showing uniformity in the width direction as well as a method for manufacturing the polystyrene resin foamed sheet. SOLUTION: The polystyrene resin foamed sheet is obtained by extrusion- molding a polystyrene resin and a foaming agent and has the end part in the width direction molded thicker than the average thickness in the width direction. Further, the polystyrene resin foamed sheet is rolled and then is aged.