| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a molded object for multi-color developing laser marking characterized in that when the film surface of the molded object with a film formed by coating is irradiated with a laser light, the laser-irradiated part of the film is removed and not less than two markings of a differing color tone including a chromatic color deriving from a colorant contained in the molding part, are sharply formed by not less than two laser lights with a differing energy further emitted through the removal part (a removal space), and the molded object with the markings and a laser marking method. <P>SOLUTION: This molded object has the molding part including a composition X containing a polymer, a chromatic colorant and a black substance which perishes by itself or becomes discolored by receiving the laser light and a film part which is arranged on the surface of the molding part and contains a composition Y containing an organic material and/or an inorganic material. In addition, the content of the chromatic colorant added to the composition X, is 0.001 to 3 pts. mass, when the total polymer content is given as 100 pts.mass. Besides, the content of the black substance is 0.01 to 2 pts.mass. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
