b'solids.Finding the sweet spot for theFigure 2 is an example of a modernFinding theequilibrium of a press fabric and thus operation of the Suction Turning Rollshoe press machine with a Suctionsweet spot forhow it performs in the nip.Also the is important for achieving maximumTurning Roll. the operationreduction of any form of rewetting pressing efficiency.This is not alwaysof the Suctionis essential, whether it is external as simple as running to a set vacuumLike the Suction Turning Roll operation,Turning Rollrewetting while the sheet travels on levelthe dynamic properties of thethe press fabric itself plays a majoris importantthe fabric from the forming zone to press fabric can have an importantrole in the overall success of a Tissuefor achievingthe press, or separation rewetting that impact on how the suction turningMachine shoe press.The pressmaximumoccurs at the separation point of the roll is dewatering.Incorporating anfabric has to be designed and built topressingsheet and the fabric, just after the exit anemometer in the vacuum line toevacuate water in the suction zone, allefficiency. of the shoe.track and trend air flow in cubic feetwhile providing the right characteristics per minute or meters per second canto achieve maximum press solids in theThere is also a press fabric and shoe be an excellent indicator of pressnip.If a press fabric is too heavy, toopress belt interaction in the press fabric behaviour.If measured airthick, or too open the dewatering at thenip that has a large impact on overall flow is outside of the ideal range forsuction turning roll can be insufficientefficiency.Early shoe press belts a given machine, the showering andto the point of excess crushing in thehad relatively low void volume and conditioning of the press fabric can benip.If the fabric is too closed up ormuch softer resins, which led to lower adjusted to optimize performance.Thetoo dense, a similar phenomenondryness and holes in the sheet.More presence of a steambox for moisturemay be experienced.Response torecent belt designs have a void volume profiling at the Suction Turning Roll ishigh pressure needle and flooded nipin the 400-500+ cubic centimeters also common to help optimize machineshowering, in addition to uhle boxper meter squared (cc/m2) range, runnability and parent roll quality. vacuum, all play a part of the dynamicand incorporate newer resins and Figure 2. Modern Tissue Shoe Press machine with a Suction Turning Roll. TISSUE TECHNOLOGY INTERNATIONAL93'