Details
| Original language | English |
|---|---|
| Pages (from-to) | 3243-3255 |
| Number of pages | 13 |
| Journal | Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering |
| Volume | 235 |
| Issue number | 13 |
| Early online date | 6 Dec 2020 |
| Publication status | Published - Nov 2021 |
| Externally published | Yes |
Abstract
Fiber-reinforced plastics (FRP) are widely used in the automotive industry due to their lightweight construction potential. Especially, injection-molded 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 (Polyamide 6 (PA6) 36 mJ/m), on the other hand residues of release agents on the surface hinder adhesion between product and adhesive. 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 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, material-specific properties are measured. The influence of laser pre-treatment at 355 nm and 1064 nm wavelength is investigated. Measurements of surface free energy and surface roughness are conducted. The bonding strength is validated by peel test and tensile shear tests. The shear strength was doubled by laser pre-treatment at a medium energy level, partially cohesive failure of the adhesive was achieved. Both investigated wavelengths led to a great improvement of bonding strength at suitable parameters.
Keywords
- Adhesive bonding, laser beam, polyamide 6, surface pre-treatment
ASJC Scopus subject areas
- Engineering(all)
- Aerospace Engineering
- Engineering(all)
- Mechanical Engineering
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In: Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, Vol. 235, No. 13, 11.2021, p. 3243-3255.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Improvement of the adhesive bonding properties of an polyamide 6 injection molded fiber reinforced plastic component by laser beam pre-treatment
AU - Weiland, Josef
AU - Dittmar, Hagen
AU - Beier, Christoph J.A.
AU - Ramesh, Chiranth
AU - Marx, Bernd
AU - Schiebahn, Alexander
AU - Jaeschke, Peter
AU - Overmeyer, Ludger
AU - Reisgen, Uwe
N1 - Funding Information: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The IGF-project 19727, “ProKleb – Prozessbeobachtung und -regelung der Klebvorbereitung PUR – und thermoplastbasierter, faserverstärkter Kunststoffe mittels Laser” of the research association “DVS German Welding Society” is funded within the framework of the industrial collective research program (IGF) by the Federal Ministry for Economic Affairs and Energy on the basis of a decision by the German Bundestag.
PY - 2021/11
Y1 - 2021/11
N2 - Fiber-reinforced plastics (FRP) are widely used in the automotive industry due to their lightweight construction potential. Especially, injection-molded 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 (Polyamide 6 (PA6) 36 mJ/m), on the other hand residues of release agents on the surface hinder adhesion between product and adhesive. 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 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, material-specific properties are measured. The influence of laser pre-treatment at 355 nm and 1064 nm wavelength is investigated. Measurements of surface free energy and surface roughness are conducted. The bonding strength is validated by peel test and tensile shear tests. The shear strength was doubled by laser pre-treatment at a medium energy level, partially cohesive failure of the adhesive was achieved. Both investigated wavelengths led to a great improvement of bonding strength at suitable parameters.
AB - Fiber-reinforced plastics (FRP) are widely used in the automotive industry due to their lightweight construction potential. Especially, injection-molded 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 (Polyamide 6 (PA6) 36 mJ/m), on the other hand residues of release agents on the surface hinder adhesion between product and adhesive. 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 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, material-specific properties are measured. The influence of laser pre-treatment at 355 nm and 1064 nm wavelength is investigated. Measurements of surface free energy and surface roughness are conducted. The bonding strength is validated by peel test and tensile shear tests. The shear strength was doubled by laser pre-treatment at a medium energy level, partially cohesive failure of the adhesive was achieved. Both investigated wavelengths led to a great improvement of bonding strength at suitable parameters.
KW - Adhesive bonding
KW - laser beam
KW - polyamide 6
KW - surface pre-treatment
UR - http://www.scopus.com/inward/record.url?scp=85097318541&partnerID=8YFLogxK
U2 - 10.1177/0954407020976195
DO - 10.1177/0954407020976195
M3 - Article
AN - SCOPUS:85097318541
VL - 235
SP - 3243
EP - 3255
JO - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
JF - Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
SN - 0954-4070
IS - 13
ER -