Valmet is the first company in the world to offer roll covers based on biomaterials and recycled materials for board, paper, tissue and pulp making. These new composite covers for press, guide and calender rolls are now available for the first customer deliveries.
In new composite roll covers Valmet uses bio-based resin and hardener in the polymer matrix. The reinforcing fiber and filler are originating from recycled consumer plastic and glass. Depending on cover type, the content of recycled or bio-based raw materials is 75-96 percent. New materials are being tested continuously, and the target is to reach 100 percent as soon as possible.
Valmet has set strict criteria for the bio-based raw material in the covers. Only renewable materials derived from non-food chain plants or plant parts are used, in order to prevent the effect to global food production. Cultivation and harvesting of plants must not endanger the growth of natural forests either.
“In best cases, bio-based materials can be produced from plant parts that would otherwise be waste. For example, lignin, carbon black made of lignin and nanocellulose can be utilized as reinforcing fillers in roll covers,” explains Jani Turunen, R&D Manager for Polymeric Roll Covers, Valmet. “Our customers do not have to compromise in product performance either, as the results have shown that in some applications the performance is even above the traditional offering.”
A more sustainable future with a new generation of roll cover materials
Roll covers used in paper, board, tissue and pulp making need periodical renewal and thus consume tons of materials. A major part of the raw materials of traditional roll covers has been manufactured from fossil-based materials, which has been refined and processed from crude oil.
Valmet’s R&D work focuses strongly on enhancing raw material and energy efficiency and promoting the use of renewable raw materials. Valmet is continuously investigating the possibilities to replace fossil-based materials with renewable or recyclable materials. For example, recycling and more sustainable use of ceramic and metallic roll covers is under active research.
“Our continuous investing in R&D of sustainable solutions for our customers helps us increase the occupational safety of our employees, replace fossil-based raw materials with renewable ones, re-use and recycle materials and save energy. This is our contribution to the global challenge we face regarding our planet’s future. And by doing this, we are helping our customers do their part as well,” says Jukka T Heikkinen, Senior Manager, Roll R&D, Valmet.
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Valmet is the leading global developer and supplier of process technologies, automation and services for the pulp, paper and energy industries. We aim to become the global champion in serving our customers.
Valmet's strong technology offering includes pulp mills, tissue, board and paper production lines, as well as power plants for bioenergy production. Our advanced services and automation solutions improve the reliability and performance of our customers' processes and enhance the effective utilization of raw materials and energy.
Valmet's net sales in 2018 were approximately EUR 3.3 billion. Our more than 13,000 professionals around the world work close to our customers and are committed to moving our customers' performance forward - every day. Valmet's head office is in Espoo, Finland and its shares are listed on the Nasdaq Helsinki.
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