Method for welding together plastic parts with the aid of laser radiation

US7875147B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Arno Boehm · Mannheim, DE
• Andreas Haas · Armstorf, DE
• Werner Rautenberg · Dietenhofen, DE
• Michel Sieffert · Wackernheim, DE

Key dates

• Filing date: Apr 8, 2005
• Grant date: Jan 25, 2011
• Expiry date: Apr 7, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31504
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Provided is a process for fusion-bonding plastic parts with the aid of laser radiation of a wavelength outside the visible region, wherein a bonding region of a plastic part to be bonded comprises at least one material which is transparent in the visible region of the electromagnetic spectrum, is substantially colorless and absorbs the laser radiation, wherein the material comprises at least one nonionic compound that is resistant to the laser radiation, has a thermal stability of at least 300° C. and is selected from polycyclic organic compounds, doped tin oxides and hexaborides MB6 of lanthanides and alkaline earth metals M. Also provided is a preparation suitable for producing fusion-bonded plastic parts with the aid of laser radiation whose wavelength is outside the visible region, the preparation comprising: a thermoplastic matrix polymer suitable for forming the plastics parts; at least one of said material; optional UV stabilizers; and optional additives.