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world pulppaper 67 The initial focus was a bottom fabric life of 200 of that of the pickup fabric life. This would allow the replacement of the bottom fabric at every second replacement of the pickup fabric were to be found here. Despite promising early results several key challenges had to be overcome before all goals were met and the project could be successfully completed. CoordinaTed replaCemenT of The boTTom- and piCk-up-fabriCs The pickup fabric has a far shorter serviceable life than the bottom fabric. The paper machine operator was faced with the dilemma of either replacing the bottom fabric together with the pickup despite the fact that it did not yet need to be replaced or risk having to shut down the machine for bottom fabric replacement before the new pickup needed replacement. For this reason the initial focus was directed at achieving a bottom fabric life of 200 of that of the pickup fabric life. This would allow the replacement of the bottom fabric at every second replacement of the pickup fabric. The challenge in this was maximising the life of both press fabrics without compromising paper quality or causing other issues. Initially a replacement interval of six weeks for the pickup and twelve weeks for the bottom was chosen. While both fabrics performed well throughout their life cycles start- up with a new pickup fabric and used bottom fabric proved problematic. By incorporating a start-up aid in the pickup fabric this issue was effectively eliminated. This achievement was the first major project milestone. The bottom fabric could now be run for twelve weeks following the first replacement of the pickup felt after six weeks. Downtime for fabric replacement was minimised and safety was not compromised with either fabric as both were on-machine- seamable SeamTech. an indusTry-wide premier a seamable non-woven Through its non-woven structure Albany Internationals new HydroCross fabric provided improved sheet smoothness while simultaneously using less vacuum energy providing a fast start-up and an excellent life. In addition the improved dewatering provides improved sheet dryness. Despite these advantages there was one major drawback in the use of a non-woven in the press section to date no PMC manufacturer had successfully incorporated a seam with a non-woven press fabric. An on-machine-seamable fabric decreases down time and increases safety during fabric replacement. Developing a successful seam technology for non-woven press figure 2. Albany International Making Childs Play of Press Fabric Installation