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Aqua layering technology

Two-layer sheet with one headbox

Valmet's OptiFlo headbox with new innovative aqua layering technology makes it possible to produce a two-layer sheet with very good layer coverage using only one headbox and forming unit. The aqua layering technology has been developed for the most challenging stratified solutions where layer purity is a key feature. It produces a perfect, disturbance-free, purely layered structure that boosts strength properties.

How does it work?

The new aqua layering technology uses a thin water layer as a headbox wedge to stabilize layers and to form an even film while layers of stratified paper are being joined together. It prevents mixing of stock layers and also enables feeding of functional additives between the stock layers.

Principle of the new aqua layering technology. Thin water layer is used as a headbox wedge to stabilize layers.

New resource saving ideas

This type of layering provides possibilities to adjust quality and especially strength properties. Cost savings can be achieved, for example, by using different furnish qualities, cheaper raw materials, and functional wet end additives between the layers. Furthermore, as layering is done with one headbox and forming section only, the investment is both cost and energy efficient.

30% less strach needed

At PM1 at Dongil Wolsan mill in South-Korea, the new OptiFlo layering headbox enables feeding starch between the layers. This increases significantly the strenght properties of the end product while providing cost savings as 30% less starch is needed for same strenght increase. Read more here.

The aqua layering technology can be combined with both OptiFlo Layering Fourdrinier and OptiFlo Layering Gap headboxes for optimized end product quality and cost-efficient production.

 

   

Valmet's headbox technology awarded first prize at ATIP Innovation Contest

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Customer success story

Finding a better way forward

Finding a better way forward

The new innovatiove OptiFlo layering headbox at Dongil Wolsan PM1 enables feeding starch between the layers. This increases ignificantly the strenght properties of the end product while providing cost savings as 30% less starch is needed.