22 PRODUCTS & SERVICES INDUSTRY NEWS
Quick start up promised for press fabric
a special yarn system allowing it to consistently maintain its dewatering performance and void volume over its entire operating life. The special yarn structure of
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the Velocity fabric results in better pressure distribution over the entire width of the fabric, enabling it to absorb water faster and reach a higher saturation more quickly. As a result, the desired hydraulic nip pressure is achieved in an efficient manner, which in turn guarantees
new press fabric from Voith is said to offer impressively quick start-up and features
optimum dewatering and high paper quality. For even better results,
Velocity can also be supplied with a Vector module, a three-dimensional non-woven component that increases the void volume of the fabric while retaining its compressibility. Moreover, Velocity has smaller pores than conventional press fabrics, generating a higher flow velocity in the fabric and thus preventing dirt from depositing on its surface. This self-cleaning function has a positive effect on paper quality. Velocity can be used for the manufacture of graphic paper
Pulp Paper & Logistics
and tissue as well as a range of applications for producing board and packaging papers. Voith offers the press fabric in three variants. Thanks to its modular
concept it can be customized to the specific requirements of each application. More information from Voith at
www.voith.com/paper
Paper tension and nip profile control offers fewer wet end breaks
A complete set of tools for controlling paper tension and nip profiles has been launched under the brand name iRoll, and is available for all main processes and positions in pulp, paper, board and tissue machines with the latest Valmet roll covers. By the end of June, iRoll manufacturing was due to cover Finland, France, the US, Thailand and China. Valmet has also developed local field service competencies through an iRoll academy training program. “After installing an iRoll, our
customers have thanked us for 50 per cent fewer wet end breaks per day, improved runnability, 100 per cent longer grinding
July/August 2014
hardness profile (reel), as well as paper, board or tissue tension profiles in selected positions. iRoll can even be connected to the machine automation system for closed loop process control. iRoll Portable is a quick,
intervals and a 40 per cent improvement in the coat weight 2-sigma value, just to name a few of the results iRoll has achieved,” said Samppa Ahmaniemi, director of Roll Covers at Valmet. The main benefit of the iRoll
technology is its accurate online profile measurement and process
control in press, sizer, coater, reel and winder applications. Valmet’s iRoll is claimed to be the fastest and most sensitive online profile measurement tool in the industry.
In addition to nip load profile,
iRoll also measures applicator rod load profile (sizer) and parent roll
cost-effective process analysis and tuning tool that is based on dynamic nip profile or paper/fabric tension profile measurements. iRoll Portable provides rapid results as Valmet’s experts can carry out an iRoll Portable analysis during shutdowns. More information from Samppa Ahmaniemi, Director, Roll Covers, Services business line, Valmet. Tel: 358 400 461 417. Email:
samppa.ahmaniemi@valmet.com
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