Pulp Paper & Logistics


HEIMBACH 19


different ply twist yarns as well as different yarn diameters and flexible yarn count. The evenness and uniformity


from inside the felt provides smooth felt surfaces through high contact area. The homogeneous and high contact area of Atrojet base is superior among press felt technologies. Homogeneous compact felts are important features for tissue felt application regarding even pressure transmission at the press nip which is key for even dewatering and even CD profiles of the paper. The roll side base of Atrojet felts is made of multi- axial arranged components and are selected as per individual requests concerning void volume, mechanical strength, and in the context of the individual requirements of the position, e.g. one or two nip positions or shoe press position, uhle boxes and vacuum rolls involved. A typical tissue machine could


Figure 2: With its uniform machine direction yarn structure Atrojet has far greater surface contact than conventional bases. This leads to more even pressure transmission at the press nip resulting in very steady dewatering and even CD profiles


present the performance of a press felt in the proper light. Mileage of more than 100,000 km while passing about six


4


Figure 3: Atrojet press felt


September/October 2019


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