Patent ID: 7718271

Claim:
A set of laser weldable materials used for laser-welding a first resin member and a second resin member with a third resin member by arranging the third resin member in between the first resin member and the second resin member and irradiating laser light to the three resin members of the first, second and third resin members from a first resin member side, said set of laser weldable materials comprising three materials constituting the first, second and third resin members, respectively, the first resin member and the second resin member being of different materials, and the first resin member being non-absorptive of laser light, wherein the material constituting the first resin member comprises a first resin non-absorptive of laser light, the material constituting the second resin member comprises a second resin and an additive absorptive of laser light, and the material constituting the third resin comprises a polymer having at least one constitutional unit the same as or compatible with the constitutional unit of the first resin and at least one constitutional unit of the same as or compatible with the constitutional unit of the second resin.