Trelleborg’s Rollers & Belts operation will be presenting two upgrades to its range of polyurethane coverings for its tissue converting rollers at the MIAC event taking place in Lucca, Italy, 10th – 12th October. The new Rollin PlessPlast 4 and PressPlast 4D demonstrate Trelleborg’s ability to push forward the boundaries of what can be achieved in the field of tissue converting.
Guillaume Bordais, Sales and Business Development Manager for Rollers and Belts, says: “Rollin Press Plast 4 contains a new polyurethane covering specifically designed for marrying rolls in the process of tissue converting. This incorporates several features that enable higher levels of productivity. For example, antistatic properties prevent the deposit of residues on the roller and allow for an easier cleaning operation.”
Other features include an extended mechanical stress resistance and longer lifetime, plus excellent bonding of materials during production. Rollin Pless Plast 4 offers a high abrasion resistance, good dimensional stability and low surface roughness. There is a concentricity tolerance of < 20 μm and a cylindricity of < 50 μm. The blue roller has a hardness of 90 to 98 Shore A and a maximum working speed of 800 m/min.
“Press Plast 4D combines the advantage of both Shore D and Shore A hardness. The 90 Shore A inner layer allows the rubber covering to be flexible and is able to adapt to the different settings of a lamination unit, which may change according to the final product configuration. The outside 65 Shore D layer enables perfect bonding of plies, whatever their number. Re-embossing of the bottom ply is prevented by the high pressure applied in the narrow nip footprint.”
A wide range of features has been built into this latest roller covering and these are designed to improve quality and productivity – antistatic properties, abrasion resistance, dimensional stability, low surface roughness, extended mechanical stress resistance, ability to match different nip footprints, plus increased specific pressure which allows a narrow nip footprint. The concentricity tolerance is < 20 μm and the cylindricity < 50 μm. Running speeds can be up to 800 m/min, while the maximum load is 70 kg/lcm.
“Press Plast 4D withstands load changes while maintaining an even nip footprint and is therefore suitable for the most versatile production situations,” says Guillaume Bordais. “The ability to clean the roller easily and quickly reduces downtime, while the outstanding rebound of the compound allows perfect assembly of the plies, preserving production thickness, with an even bulk along the entire log.
“As the rubber rollers are the last material to come into contact with the tissue, they play a vital part in determining the quality, character and consistency of the final product. Trelleborg’s innovative approach – using a proprietary software that is able to simulate the dynamic behavior of the rubber into the nip – and its dedication to precision have resulted in ten consecutive years of growth, with new customers in an increasing number of countries.
“Tissue convertors need their equipment to operate highly efficiently around the clock and that means they need reliable rollers. Trelleborg provides this, along with experienced engineers, whose in-depth understanding of the challenges customers must overcome to obtain the desired product features enables them to fine-tune solutions to achieve better functionality and sustainability. We’re looking forward to welcoming people on to our booth at MIAC to discuss how Trelleborg technology can help to improve the productivity of their tissue converting lines.”
Come and visit Trelleborg:
October 10 – 12, 2018