| 摘要 |
PROBLEM TO BE SOLVED: To obtain a foam which can be laser-printed without hole formation due to fusion and does not damage the surrounding articles by forming a foam comprising a composition containing a thermoplastic resin, an energy absorber which absorbs a laser beam, and a colorant in a specified ratio and having a specified thickness. SOLUTION: This foam is made from a composition containing 100 pts.wt. thermoplastic resin, desirably, a thermoplastic styrene resin, 0.001-1.0 pt.wt. energy absorber, desirably, at least one member selected among carbon, a metal oxide (e.g, iron oxide), and a processed mica, and 0.001-2.0 pts.wt. colorant and has a thickness of 0.5-100 mm. The thermoplastic resin desirably used is exemplified by a mixture of a copolymer essentially consisting of styrene and an acrylic ester with an SB block copolymer, a mixture of a copolymer essentially consisting of styrene, a methacrylic ester, and an acrylic ester with a polybutadiene, or a PS. |
