J. Weiland
H. Dittmar
D. Liedtke
A. Birkenstock
B. Marx
A. Schiebahn
P. Jäschke
L. Overmeyer
U. Reisgen

Individualized laser beam pre-treatment process for adhesive bonding of a polyamide 6 injection molded fiber-reinforced plastic component under the boundary conditions of automotive industry

Proceedings of the 1st International Conference on Industrial Applications of Adhesives (IAA 2020)
Type: Zeitschriftenaufsatz (non-reviewed)
Fiber-reinforced plastics (FRP) are widely used in the automotive industry due to their lightweight construction potential. Especially, injection-moulded components are very popular because of their short cycle times. Unfortunately, this manufacturing process results in some disadvantages for delayed adhesive bonding. On the one hand, such thermoplastics have a very low surface energy (PA6 36 mJ/m) and on the other hand, these components have residues of release agents on their surface. These disadvantages have to be overcome by the right surface pre-treatment process. Currently, a solvent-containing process is usually used for this purpose. If it is necessary, the use of primer is common. In the presented paper, the pre-treatment process of an injection-molded component made of polyamide 6 reinforced with glass short-fibers is presented. First, materialspecific properties such as surface energy or roughness are discussed, then the effect of laser beam pre-treatment with wavelengths 355 nm and 1064 nm is demonstrated. In the end, the results are validated on tensile shear specimens.