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Collaboration ensuring eminent results for German packaging company 

Kemira contributes with chemical expertise

In 2010, Germany’s Eisenhüttenstadt experienced an economical boost as Propapier GmbH with its Next Generation Products opened a containerboard mill in the locality. Kemira worked in close cooperation with the client as well as the Finnish company Metso, the supplier of the PM2 paper machine for the new mill. Kemira’s role was to deliver a full service chemical package to the cardboard mill, including water treatment, retention technology and color adjustment.

The PM2 attained impressive results from the beginning: the cooperation between Kemira, Metso and the mill resulted in a fine-tuned machine that breaks world speed records and enables machine efficiencies close to 95%. It is one of the most technologically advanced paper machines in the industry.

New technology reduces over-packaging

Retention and dewatering polymers have been the key for machine efficiency optimization and stability of the wet end process. In 2012, after comprehensive trial runs, the retention system of PM2 was extended with micro particle technology, which further improved the runnability of the machine, and produced lower break frequency as well as a cleaner short circuit.

Another new development taken into operation in the mill is an advanced Next Generation paper production technology delivering lighter paper with similar strength to the market. The environmental advantages are significant: a smaller amount of raw material is needed, water and energy demand is lowered and less grammage indicates less over-packaging. The new PM2 is a forerunner in the continuous effort to decrease the area weight of packaging materials at maintained strength.

Efficient water treatment reduces environmental strain

Another crucial standpoint regarding the environment is the mill’s water treatment. Paper production swallows enormous quantities of water, and efficient recycling of the process water places challenges for the chemical system. Kemira contributed water chemistry knowledge to the project achieving good results. Through the fixation of interfering substances with cationic polymers the process water became much cleaner, reducing deposit formation and overall chemical consumption. Moreover, sludge treatment and chemical treatment of the micro flotation process improved total fiber yield, improving the product quality, and reduced the amount of waste and energy consumption.