With a wire width of 10,450 mm, the paper machine was designed for an annual output of 360,000 metric tons of newsprint in a basis weight range of 40-55 gsm. At a maximum operating speed of 1,900 m/min, PM 7 produces standard and upgraded newsprint.
Voith Paper supplied the entire production line, including stock preparation, approach flow system, paper machine, and all associated auxiliaries. The scope of supply also included two winders, reel transport system, roll wrapping station, an extensive automation package, and machine clothing, roll covers, and doctor blades. In addition, the capacity of the effluent clarification system was doubled by using a new type of carrier material in the biological stage.
In stock preparation, the energy-saving TwinDrum drum pulper handles raw-material pulping for the already existing line as well as for the new one. Outstanding components of the automation package are the machine control, process automation, and a multitude of field instruments.
Beyond the basic scope of supply, Voith was responsible for the mechanical, process technology, and control systems according to the Process Line Package (PLP) principle. This means that Voith supplied not only the detail engineering for the entire production line, but also additional services, such as complete installation, startup, and optimization.
Perlen Papier AG, founded in 1873, is a major producer of magazine and newsprint papers in Switzerland. In 2009 the family-owned business had 358 employees and net sales of EUR 203 million.
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