Pulp Paper & Logistics


PRODUCTS & SERVICES 27


felt application with regard to 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 selected based on customer requirements for void volume, mechanical strength, as well as the number of nip or shoe press positions, Uhle boxes and vacuum rolls involved. Typically, a press felt’s lifetime mileage of more than 100,000 km while passing about six million nip cycles and handling more than 50,000 cubic metres of water are normal requirements for a tissue felt. The level of performance is expected to be at steady high level throughout the service life of a felt. Where there is little variation


in process parameters, the felt design can be fine-tuned to its maximum performance under those standard conditions. As parameter variations increase, so does the challenge of achieving an adaptable felt design.


The roll side base of Atrojet felt is made of multi-axial arranged components


An example of varying process


parameters are paper grade changes, which include machine speed and paper weight changes, but different furnish compositions like virgin pulp or recycled fibres as well as the use of wet strength resin or dye and fixative can have an effect. Production planning is vital for the smoothest possible transition of process parameters during machine clothing lifetime. “But these days flexibility can be key too, especially for just-in-time


deliveries where sudden process changes do occur,” says strategic product manager Jochen Pirig. A press felt must tolerate such changes. Pirig notes that the Atrojet design flexibility has the required adaptability for those changing conditions. The product’s homogeneous and strong inner structure also contributes to high fibre batt anchorage. Atrojet has shown its robustness towards harsh high pressure (HP) shower cleaning which can prevent felt clogging,


for instance when changing from virgin pulp to de-inked pulp and/ or producing non wet strength to wet strength grades. Atrojet is able to take up even long-term laminar HP showers at pressure ranges of more than 30 bar.


Heimbach has invested in its


new Atrojet manufacturing facility, which has been in production since early 2016. “We really feel that Atrojet represents the next evolutionary step in the felts sector,” concludes Kiefer.


Data analytics enhance delivery and customer satisfaction


Customer satisfaction at every contact by Valmet with the pulp, paper and energy industries is being enhanced with a new service being provided by Dassault Systèmes.


As a supplier of technologies,


automation and services, Valmet is using the Single Source for Speed ‘industry solution experience’ to unify and manage its product development and order fulfilment across its engineering and service


centres in 30 countries. Valmet says that in a digital


collaborative environment, its teams have greater visibility on what products and services should be included in a specific offering, as well as on what future resources will be needed as a project evolves. This will help to improve the reliability and performance of its customers’ processes and enhance their use of raw materials and energy. Valmet’s teams will be able to interact, leverage skills and


knowledge, and easily and securely access a digital, single source of real-time information related to products, parts and projects. Data analytics, enterprise search, and program management applications facilitate the efficient reuse of legacy information to help avoid unnecessary and costly engineering of existing components and parts. “We are deploying Dassault


Systèmes’ ‘Single Source for Speed’ to improve collaboration and productivity,” said Sampo


Vörgren, Director for PLM and Customer Solutions at Valmet. “Our long-term vision includes developing solutions for production facilities that reduce emissions, energy and water consumption or that leverage the industrial internet of things or augmented reality. A digital platform enables us to propose the right offerings and manage the right product portfolio to better support excellence in our own processes and innovation and, ultimately, our customers’ sustainability efforts.”


September/October 2017


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