Tissue Dryer Section

This type of cylinder can be built with diameters up to 5.5 m, or in special cases up to 6.7 m, and widths of up to 9 m. It has a free outside surface area of up to 96% in order to have a uniform air flow through the paper web. I uring its contact with the cylinder the paper web is supported by a revolving wire. The cylinder can run at speeds of up to 3000 m min. Air is usually sucked into the cyhnder by reduced pressure and is suppHed by a hood wrapping the cyhnder by about 250°. The temperature can be up to 300 °C. The design has to withstand the heat up and cool down cycles during its operational Hfe and always has to ensure a uniform geome- 

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The dryer section in tissue machines consists of either... 

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