Folding Board
Smoothness versus Bulk
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To apply this new water spray technology in a board machine close to the calender, mechanical solutions needed to be found. This is an area where water drops, condensation and mist are not permitted. A combination of different technologies such as water spray, suction devices, heated pan and enclosed spray area assure that the water is applied on the paper without affecting the process area. With the new SprayTech technology you can apply the right amount of water, calibrating the flow for your specific case. Also, you can profile the flow in cross-machine direction to correct any variation in CD smoothness. |
The proper amount of water on the surface of the board upstream of the calender can improve smoothness by 20%. This has been demonstrated in recent applications. In conclusion, the technology for better smoothness exists, and offers the right tools to control the amount of water required on the surface of your board upstream of the calender. This technology makes it possible to maintain the internal board moisture at the required level and measurably prevent bulk reduction. Page |
