Water-based PVDF coating concept
To improve illumination, visibility, cleanliness and safety within the Changwon Tunnel, the tunnel operator decided to paint the uncoated ceiling with a new water-based PVDF coating, called AKUAFLON®. As part of the decision other important coating performance characteristics was desired as long term durability, ability to resist dirt, biological growth accumulation, other weathering factors, and retention of reflective value and color.
Kynaraquatec have the following statement of their product:
AKUAFLON® coating is based on Kynar Aquatec® PVDF technology. Coatings containing these emulsions provide the long-lasting durability and excellent weatherability benefits of traditional Kynar 500® resin-based coatings and can easily be applied to a variety of substrates.
Another benefit of the Kynar Aquatec® resin-based AKUAFLON® coating is its exceptional resistance to dirt pickup and biological growth that can reduce reflectivity.
The Changwon Tunnel is 20 years old and have a four lanes. The tunnel is located in the South Gyeongsang Province of South Korea. The twin bore tunnel are 2,3 km long. The tunnel has some challenges when it comes to operation and safety, with a significant ascending/descending climb inside the tunnel.
Photo: Kynar Aquatec