Patent ID: 7875147

Claim:
A process for fusion-bonding plastics parts with the aid of laser radiation of a wavelength outside the visible region, in which the bonding region of one of the plastics parts to be bonded has a material which is transparent in the visible region of the electromagnetic spectrum, is substantially colorless and absorbs the laser radiation, which comprises using, as the material absorbing the laser radiation, at least one nonionic compound resistant toward the laser radiation and having a thermal stability of at least 300° C., selected from the group of the quaterrylene-3, 4:13,14-tetracarboximides, quaterrylene-3,4-dicarboximides, terrylene-3,4:11,12-tetracarboximides or terrylene-3,4-dicarboximides, the doped tin oxides and the hexaborides MB 6 of lanthanides and alkaline earth metals M.