| 摘要 |
PROBLEM TO BE SOLVED: To provide a new polystyrene resin foam that has a stripe-like pattern formed by colored resins laminated in the form of stripes and prevents falling off of coloring agents, and is easy in manufacturing and low in cost.SOLUTION: In a polystyrene resin foam 1 where colored resins 3 containing a polystyrene resin and a coloring agent are laminated in the form of stripes on at least one surface of a polystyrene resin foam layer 2, the colored resins further contain a copolymer of ethylene and a vinyl monomer having a carboxyl group, the content of the copolymer in the colored resins is 4-40 wt.%, and the content of the vinyl monomer component having a carboxyl group in the copolymer is 10 wt.% or less.SELECTED DRAWING: Figure 1 |
