Adhesive bonding instead of screw fastening
A vehicle nowadays is likely to have around 18 kilograms of adhesive. Bonding has long become a key technology in automotive and aerospace engineering, increasingly displacing conventional joining technologies such as welding, clinching, riveting and folding. Crash tests prove that cars with adhesive-bonded joints generally fair better than those with welded joints, as – thanks to their elasticity – adhesives are able to cushion the impact more effectively. Adhesive-bonded front and rear windscreen joints increase autobody rigidity and allow constructions which, thanks to reduced air resistance, lead to significant fuel savings. Without adhesives, no aircraft would be able to take off – and that’s because adhesive-bonded joints are better able to withstand the extreme loading that occurs. They are significantly more durable, more stress-free and safer.
When it comes to the manufacture of products having to satisfy a particular requirements profile, companies require reliable partners with innovative, ready-to-market concepts capable of superior performance. As a market leader in the field of two-pack epoxy adhesives, Cognis offers products featuring rapid drying, high bonding power on numerous different substrates, enormous adhesive strength and a durability that can be measured in years. The Cognis photomer adhesives concept is specifically geared to reinforcing the bonding power of reactive adhesives on various substrates, including the plastics: polycarbonate (PC), polyethylene terephthalate (PET), polypropylene (PP), polyethylene (PE) and thermoplastic olefins (TPO).
Cognis solutions: Capcure® mercaptans – toxicologically sound, high-performance concepts for fast-setting 2-pack epoxy adhesives.
Benefits:
- Excellent adhesion to a wide variety of substrates
- Little or no surface preparation
- Low-temperature cure
- Thin-film cure
- Light colour
- Bond strength sufficient to replace mechanical fastening
- Reduced skin irritation as compared to similar acrylic systems