POLYSTYRENE RESIN FOAMED SHEET AND LAMINATED FOAMED SHEET

摘要

PROBLEM TO BE SOLVED: To provide a polystyrene resin foamed sheet capable of easily forming a high-quality laminated foamed sheet by thermal adhesion of a resin film to further improve thermal adhesion between the polystyrene resin foamed sheet and the resin film during formation of the laminated foamed sheet, and to provide a laminated foamed sheet having excellent peeling durability between the polystyrene resin foamed sheet and the resin film.SOLUTION: A polystyrene resin foamed sheet is formed by extruding and foaming a polystyrene resin composition containing a foaming agent. In the polystyrene resin foamed sheet, at least one surface has a surface roughness of which the maximum height of a contour curve based on JIS B0601:2001 is 30 μm or more and 100 μm or less. The average density from the surface to a depth of 0.2 mm in a thickness direction is 0.14 g/cmor more and 0.20 g/cmor less.