b'PRESS FABRIC OPERATIONmachine builders, clothing suppliers continue to develop the next generation of press fabrics for Tissue shoe press positions.Albany International has developed non-woven membrane fabrics such as AperTech III and SPRING M II (Figure 5), and these products are growing.The advanced technologies used in AperTech and SPRING M move from two component structures (base + batt fibre) to three component structures (base + polymeric layer + batt fibre).By replacing some batt fibre with a polymeric layer, the press fabric becomes more steady-state and changes less over the life of the fabric, which provides a bigger operating window for the tissue machine.In addition, the SRPING M component Figure 5. Spring M II. has a mechanical structure such that it promotes nip dewatering which lower tilt creates a lower peak pressurethe Suction Turning Roll.In contrastnaturally flushes and cleans the with a gradual pressure increasefor the stand alone shoe presses,press fabric in the nip.This highly throughout the nip width to maximisethe Dynavent and Dynatex both havecompressible structure also improves sheet caliper and bulk.Using a highervariants in their respective batt fibrepressure uniformity leading to better tilt generates a high peak pressure withand base designs to withstand theseprofiles and higher press solids.a steep pressure increase to achievehigher press loadings to allow low flow maximum press solids. resistance and maximised press solids,As energy savings is a major priority while avoiding crushing.Specialin all parts of the world, and product To realise the needs of these newenhancements are also availablequality is a key driver for certain market shoe presses, Albany International hasfor application on any Tissue shoesegments, shoe presses in Tissue continued to develop products to meetpress fabric to realise further gains. will continue to expand throughout the demands and adapt the productFibrenetics ESU (Enhanced Startthe global landscape.Various new offering for optimal performance onUp) is the most common shoe pressmachine concepts come standard with these applications.A new layout offabric add-on globally, allowing for theOne thing isa shoe press incorporated into their the Dynavent II was engineered for thefastest break-in time and lowest energycertain: wedesign, and those continue to grow shorter machine direction length shoeconsumption.This is achieved throughhave not seenaround the market as well.Ensuring press machines.This design providesthe increased surface smoothness andthe end ofthe press fabric is properly conditioned, a very thin, light-weight fabric with acontact area that the Fibrenetics ESUdifferent anddewatered at the turning roll, and most unique z-directional pore structure asimparts on the paper sheet. innovativeimportantly engineered for optimum compared to any other design concept.ways toperformance is the key to maximising The sheet side surface propertiesTHE NEXT GENERATION incorporatethe benefits a shoe press can provide.create very little rewetting, both externalOne thing is certain: we have not seena shoe press and separation, while leaving an openthe end of different and innovativeconcept intoDynavent, Dynatex, Fibrenetics, interior for water removal into the voidways to incorporate a shoe pressa TissueAperTech and SPRING are tradenames volume of the shoe press belt, and intoconcept into a Tissue Machine.LikeMachine. of Albany International Corp.96 TISSUE TECHNOLOGY INTERNATIONAL'