Abrasion and temperature resistance

New PU roll cover for press rolls

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Problems are often encountered with conventional rolls when processing pulp. The rolls cause high specific pressures as well as a short nip. To prevent this, Voith is now offering a new polyurethane (PU) roll cover that has been developed for press rolls: the IntensePress. This has been specifically designed for use in the demanding applications of pulp machines and twin-wire presses.

The decisive advantage of IntensePress is its high chemical resistance. Furthermore, it is characterized by a high level of temperature resistance. Both features increase the running time of the roll, simplify work processes, and thus increase the machine’s productivity. The high chemical and temperature resistance are made possible by a new type of polyurethane.

To provide customers with the best possible output when using IntensePress, Voith is investing in individually tailored advice. The roll cover’s PU surface is modified according to individual requirements, for example, to achieve a greater open surface and thus increased dewatering performance and a higher dry content. IntensePress can also ensure a wider nip and, in doing so, minimize the specific pressure. Voith determines what the optimal nip load will look like for each customer, taking into account the individual operating conditions.

IntensePress can be used on all current machines on the market. The Chinese pulp and paper manufacturer Asia Symbol Rizhao has already used the roll cover for a test run. «Unlike conventional PU covers, IntensePress has demonstrated a reliable performance level in the critical chemical environment of pulp machines» reports Guangcai Xiao, pulp line director at Asia Symbol Rizhao. She adds: «the project is very successful, as it is generating considerable energy savings for us».

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