Equipment & Systems
Sun Paper starts up one of two liner machines
Chinese papermake Sun Paper successfully started up its new kraft liner paper machine, which has an annual capacity of 800,000 tonnes, at its location in Zoucheng. The paper machine consists of the right-hand machine PM 31 and the left-hand machine PM 32, both provided by Voith.
By Cindy Macdonald
PM 31 has successfully started up, marking a milestone in China’s papermaking sector, as it is believed to be the first time that two different packaging paper machines have ever been installed in a single workshop.
The project will help Sun Paper achieve high production efficiency, significant cost savings and efficient fiber utilization during the manufacturing process.
With a production width of 6,660 mm and an operating speed of 1,200 m/min, PM 31 produces testliner in the basis weight range of 110 to 250 g/m2. Its advanced technology includes a three-layer MasterJet headbox, a Tandem NipcoFlex shoe press and a SpeedSizer, as well as the hard nip calender.
The installation of the PM 31 started in October 2015 and it became operational on July 10, 2016, which Sun Paper considers an impressive achievement in the domestic papermaking industry.
With close cooperation of taskforces from Voith and Sun Paper, PM 31 achieved paper on reel earlier than Sun Paper had anticipated. In addition, it took only 12 hours from stock on wire to paper on reel. The company reports that it only took one day to produce saleable paper, and that PM 31 is running quite smoothly and stable after startup.
The left-hand machine, PM 32, is expected to start up on August 8, 2016. PM 32 will feature “one headbox, two layers”, with tandem NipcoFlex, surface sizing and hard nip calendar. It produces corrugating medium and testliner in the basis weight range of 90 to 140 g/m2.
With Fourdrinier (top layer) and DuoFormer D II (bottom layer), PM 32 promises good product quality at a high operating speed. In addition, PM 32 is the first paper machine to adopt the advanced double-layer headbox, MasterJet Pro F/B2.
Sun Paper, headquartered in Shandong Province, is a major paper manufacturer in China and one of the top 500 enterprises in the country, with total assets worth 28.8 billion yuan and an annual pulp and paper manufacturing capacity of 4.5 million tonnes.