WORLD PULP&PAPER 70 HIGH TENSILE WITH DEINKED FURNISH Joe Pankratz, Vice President of Manufacturing, elaborates on some the driving factors in the decision for NTT: “The machine design gave us the opportunity to make a different type of texture than most away-from-home products. Also, the design takes away The Advantage NTT technology has a powerful dewatering system… which enables not only energy savings but also very high production rates. enables production of textured tissue with considerably higher bulk and improved water absorbency. Depending on the belt design being used, the bulk increase over conventional grades can be between 50-80%, and that allows fibre savings, with lower basis weight at the same bulk. It is easy to swing between the production modes with a belt change – and this can be done in just a few hours. The Advantage NTT technology has a powerful dewatering system based on shoe press technology, which enables not only energy savings but also very high production rates. By increasing the sheet dryness from 38 to 42% (up to 50% is typical when operating the NTT machine in plain mode), the energy saving or increased production capacity can be about 30%. The press section consists of two fabric loops: the felt loop and the NTT belt loop. The felt runs through a SymBelt press nip which transfers the sheet to the NTT belt. The linear load is significantly higher in the shoe press nip compared to a conventional Yankee press nip. In the NTT concept, the press unit has been moved away from the Yankee dryer, leading to improved bulk and moisture profiles. The solid transfer roll is used to apply the sheet to the Yankee at a relatively low linear load. Figure 2. Von Drehle Yankee. NATCHEZ MACHINE KEY METRICS • Top speed: 6200 fpm (1890 m/ min), light tissue • Production records: 95 t/d tissue, 148 t/d toweling • Dryness to Yankee: better than 47 to 48% • Parent rolls without breaks much better than industry norms NEW TISSUE TECHNOLOGY: CASE STUDY