| 摘要 |
<P>PROBLEM TO BE SOLVED: To obtain a thermoplastic resin composition for white color marking use excellent in resistance to staining spoilage. <P>SOLUTION: The thermoplastic resin composition is obtained by compounding 100 pts.wt. of (A) a resin essentially containing a polymer with an acrylic monomer as constituent monomer with 0.1-5 pts.wt. of (B1) a low-viscosity olefin polymer 0.01-100 Pas in viscosity(η) at 230°C and a shearing rate of 1 s<SP>-1</SP>determined by a rotational rheometer and/or 0.1-1 pt.wt. of (B2) an olefin polymer higher than 100 Pas in viscosity(η) and (C) 0.0001-5 pts.wt. of a coloring material. This resin composition enables white color marking on being irradiated with laser beams. <P>COPYRIGHT: (C)2007,JPO&INPIT |
