| 摘要 |
PROBLEM TO BE SOLVED: To provide a polybutylene terephthalate (PBT)-based resin composition excellent in laser beam transmittance, moldability, and mechanical strength, and useful for laser welding and jointing of a resin molded product used in various applications, and to provide the laser-welded molded product of the same. SOLUTION: This colored resin composition for the laser welding comprises (A) the PBT-based resin comprising PBT or comprising the PBT and a PBT copolymer, (B) at least one kind of resin selected from a polycarbonate (PC) resin, a styrene-based resin, and a polyethylene terephthalate (PET) resin, and (C) two or more kinds of organic pigments, wherein the resin (B) is contained in an amount of 1-50 wt% based on an amount of the PBT-based resin (A) and the resin (B) in total, and the organic pigments (C) are contained in an amount of 0.02-0.5 pt.wt. based on 100 pts.wt. of the PBT-based resin (A) and the resin (B) in total. Further, the resin composition has the laser beam transmittance of≥10%, when measured in a wavelength range of 800-1100 nm corresponding to near infrared rays, and has an L value of less than 50, which indicates lightness. COPYRIGHT: (C)2005,JPO&NCIPI
|
