| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a new polystyrene resin foam which has a beautiful stripe-like pattern while having working characteristics equivalent to that of a conventional polystyrene resin foam, is free from the risk of falling of a coloring agent or the like, is simply produced, and is inexpensive.SOLUTION: A polystyrene resin foam 1 has a polystyrene resin foam layer 2, a coloring resin layer 3 laminated by co-extrusion of a polystyrene resin containing a coloring agent in a stripe shape on at least one surface of the form layer 2, and a film-like protective layer 4 formed of the polystyrene resin laminated so as to cover the coloring resin layer 3.</p> |
