Valmet Infinikote-2 Yankee thermal spray is chrome-free

Finland’s Valmet has introduced its Infinikote- 2 Yankee thermal spray metallizing process which, it says, is 100% chrome-free and therefore generates no harmful hexavalent chrome during application. The company says it is the most environmentally safe and durable Yankee thermal spraying coating available, with over 500 references globally on both cast-iron and steel Yankee cylinders.

Infinikote Yankee metallizing is a patented material and application process resulting in a tissue creping surface that maintains the profile and prolongs the life of the Yankee cylinder surface. However, having recognized the potential risks associated with the thermal spraying of chrome-containing materials, Valmet has developed a new 100% chrome-free product.

The primary performance objectives were to remove the environmental and safety concerns associated with thermally-sprayed products containing chrome and to apply the thermal coating with a process similar to the current one while creating a suitable surface for tissue production.

Valmet says Infinikote-2 Yankee metallizing achieves this as, whilst being 100% chrome free, it equals or surpasses all current measured criteria for thermal spray coating performance on all steel and cast-iron Yankee cylinders used in tissue production. Other benefits include:

• Tougher, more wear-resistant with better material structure and strengths
• Corrosion resistance better than Infinikote- 1 chrome-based thermal coating
• Improved heat transfer properties
•Tailor-made for tissue making where it provides a uniform surface for best sheet adhesion
• Better paper quality – ideal for running ceramic doctor blades.

Valmet, www.valmet.com

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