26 PRODUCTS & SERVICES
Press felt that combines the best of two worlds
Optimisation of process parameters for press felts over long periods can be combined with coping with changes in production with the latest press felt from Heimbach
S
ix years ago in 2011, Heimbach launched a research and development project
to marry the advantages of its most significant press felt design groups: the non-woven design group and the multi-axial design group. The press felt, Atrojet, combines the best properties of Heimbach’s Atrocross non-woven and Atromaxx multi-axial product ranges. Each design group has benefits, such as the short break in time and high nip dewatering capacity of Atrocross or the higher flexibility of base weave combinations of Atromaxx to meet individual and particular requirements. “Even though our existing
product spectrum is sophisticated, the company keeps on improving its existing product lines and
Pulp Paper & Logistics
Structure of the Atrojet press felt layer
developing new products,” says Franz Kiefer, one of the strategic product managers at Heimbach. The inside base on the paper side
of Atrojet consists of a non-woven layer made of machine direction (MD) yarns only. This gives in greater strength, evenness and smoothness of the paper-side base. The MD yarn structure is
arranged diagonally – the characteristic multi-axial angle which improves collapse resistance by increasing crossing points of all yarns.
An added feature of broader
flexibility is offered because the non-woven paper side layer can comprise 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 said to be superior among press felt technologies. Homogeneous compact felts are important features for tissue
September/October 2017
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