Laser weldable polybutylene terephthalate-series resin composition, and shaped article

A shaped composite article comprising first and second shaped resin articles laser-welded to one another, wherein the first shaped resin article is molded from a laser-weldable polybutylene terephthalate-series resin composition which comprises:

• at least one polybutylene terephthalate-series resin (A) comprising a polybutylene terephthalate-series copolymer modified with 0.01 to 30 mol % of a copolymerizable monomer, and
• at least one resin (B) selected from the group consisting of a polycarbonate-series resin (b1), a styrenic resin (b2), a polyethylene terephthalate-series resin (b3), and an acrylic resin (b4), wherein
• the weight ratio (B)/(A) of the resin (B) relative to the polybutylene terephthalate-series resin (A) is 0.1/1 to 1.5/1, and wherein
• the copolymerizable monomer comprises at least one member selected from the group consisting of phthalic acid, isophthalic acid, an adduct of bisphenol A with an alkylene oxide, and a reactive derivative thereof.

A shaped composite article comprising first and second shaped resin members that are laser-bonded to one another along an interface therebetween, wherein

• the first shaped resin member is formed from a polybutylene terephthalate-series resin composition that is sufficiently transparent to a laser beam to allow the first shaped member to be laser-bonded to the second shaped resin member along the interface therebetween, wherein the resin composition comprises:
• a polybutylene terephthalate-series resin (A) and
• an amount of a resin (B) which is sufficient to impart to the resin composition an ability to be laser welded to a counterpart resin, wherein the resin (B) is at least one resin selected from the group consisting of a polycarbonate-series resin (b1), a polyethylene terephthalate-series resin (b3) and an acrylic resin (b4), wherein
• the polybutylene terephthalate-series resin (A) comprises a polybutylene terephthalate-series copolymer modified with 0.01 to 30 mol % of a copolymerizable monomer, the copolymerizable monomer comprising at least one member selected from the group consisting of a bisphenol compound or an adduct thereof with an alkylene oxide, and an asymmetrical aromatic dicarboxylic acid or a derivative thereof capable of forming an ester, and wherein
• the resin composition exhibits a light transmittance of not less than 15% for a wavelength of 800 to 1100 nm through an injection molded test piece formed of the resin composition having a thickness of 3 mm.