| 摘要 |
PURPOSE: A laser welding method of a resin member and a laser welded body are provided to prevent the bad product like as the decomposition or carbonization of the resin member even if the process like the laser output power and density of concentrated light is changed. CONSTITUTION: A laser bonding method of resin members(10a, 10b) comprises the following steps. The resin members which are more than two are touched. The laser beam(50) is irradiated in the light absorbent(20) disposed near a contact surface of the resin members. The resin members are welded. One of the resin members at least are thermoplastic resin having a melting point or glass transition point less than 300°C. If the light absorbent is heated to 350°C using the differential thermal and thermo-balance, the weight reduction amount of the light absorbent is 40% or greater. |
