Innovative Sleeve Roll Technology Transforms Forming Section Dewatering with Forming Fabric Compression, TAPPICon24

The idea of sleeve roll technology is to compress a web between two forming fabrics against a small radius shoe. Depending on the values of the forming fabric tension and the small radius shoe, it is possible to achieve a very high dewatering pressure level of up to 150 kPa. With the basic circle of the sleeve roll, the pressure created by the fabric tension is moderate. When passing over the small variable radius shoe, the dewatering pressure increases steadily toward the maximum compression. The steadily increasing dewatering pressure in the shoe causes no defects to the web, even with very low ingoing consistency.

Depending on the forming concept, forming fabric compression has very low ingoing consistency, typically about 4 to 6 percent, and its outgoing consistency is constantly high, from 12 to 14 percent. Compression dewatering does not need a vacuum or high pulsation to remove water from the web maintaining an internal bond. Water comes out from the web at increasingly high compression and centrifugal force. The water jet is collected in a water saveall pan after the roll. This innovative technology significantly reduces the need for vacuums in the forming section, and when there are few friction components before the sleeve roll, the drives’ power consumption can decrease by tens of percent. Forming fabric compression dewatering makes the web more uniformly dense, which positively affects the bond between the fibers, and the web moisture profile is even in MD and CD directions. This technology does not set a limit on the direction of the small radius shoe, so it is applicable for a wide variety of concepts.

TAPPI conference proceedings and presentations, technical papers, and publication articles provide technical and management data and solutions on topics covering the Pulp, Paper, Tissue, Corrugated Packaging, Flexible Packaging, Nanotechnology and Converting Industries.

Simply select the quantity, add to your cart and your conference paper, presentation or article will be available for immediate download.