Résumé : |
How lightweight multi-substrate body design and low bake coatings are drivers for innovation and a challenge for coating technology.
Driven by a strong move towards sustainability, vehicle body design is going through a radical change. In response to this, Axalta Coating Systems has been looking at ways to meet the challenges that these new lightweight materials are presenting.
Increasing pressure from regulatory bodies has been put on the automotive industry to move towards more sustainable materials and processes. For several decades, regulatory requirements, such as reduction of organic solvant omission, overall CO2 reduction and increased fuel efficiency, have prompted the coatings industry to develop new, ecologically sustainable coatings, like high solids or waterborne materials and consolidated systems, such as primer-less, two-wet or three-wet systems. In order to reduce the overall weight of the car body, the OEMs want to increase the usage of lower weight materials, including aluminium and magnesium and polymeric substrates. Paint shop processes and materials need to be adapted accordingly. In the case of polymeric substrates, the baking temperatures for the coating hardening processes need to be lowered. |