Polystyrene resin extruded foam plate

摘要

PROBLEM TO BE SOLVED: To provide an extruded foam plate fused with an inner surface of a polystyrenic resin foamed body extruded into a cylindrical shape, of which appearance is beautiful, a surface is smooth, and a compressive strength is excellent.SOLUTION: A polystyrenic resin extruded foam plate fused with an inner surface of a polystyrenic resin foamed body extruded into a cylindrical shape has an apparent density and thickness in a specific range, where an average bubble diameter in an extrusion direction of the foam plate and an average cell diameter Din a width direction thereof, and a ratio (D/D) therebetween are in a specific range, a ratio (D/D) is 0.6-1.3, an average value of bubble density is 20-200 pieces/mm, and the maximum value and the minimum value of the bubble density are in a specific range.SELECTED DRAWING: None