| abstract |
Provided is a laser welded body in which easily prepared members can be integrated in a single laser welding process without going through a complicated process, and which has excellent welding strength and does not impair resin properties. The laser welded body contains 0.001 to 0.3% by weight of a colorant composed only of nigrosine having an absorption coefficient ε for a light of 940 nm of 4000 to 7000, thereby allowing a part of the laser light to pass therethrough. Laser light absorptive molding 1 which absorbs the laser light by containing 0.1 to 5% by weight of a colorant containing laser light transmission and absorption molding member 1 that absorbs another part and nigrosine and / or carbon black The member 2 is welded and integrated with the heat generated by the irradiation of the laser light while being stacked. [Selection] Figure 1 |