| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser welding method capable of obtaining at high efficacy a molded article having high quality where welding strength is stable and there is no extrusion, dull nor the deforming of the article even if there is a clearance partially and to provide a welding resin molded article obtained by the method. <P>SOLUTION: In a laser welding method for welding a permeable resin material (A) making a laser ray permeate with a non-permeable resin material (B) making a laser ray not permeate by irradiation with laser rays, a spot diameter of the laser ray irradiating an welding surface is changed according to a size of a clearance formed at the welding surface of the permeable resin material (A) and the non-permeable resin material (B), and laser ray irradiation energy (J/mm<SP>2</SP>) per unit surface area in the welding part is kept around one and the same value. A welding resin molded article is obtained by the method. <P>COPYRIGHT: (C)2011,JPO&INPIT |
