Dongil Paper's Wolsan mill in South Korea successfully starts up containerboard machine after wet end rebuild in January; Valmet-supplied rebuild that includes innovative headbox enables mill to produce four-ply containerboard, improves product quality

Debra Garcia

ESPOO, Finland , April 16, 2014 (press release) – Dong Il Paper Manufacturing Co. Ltd has successfully started up its containerboard machine in its Wolsan mill in South Korea after a wet end rebuild in January 2014. Valmet's delivery covered the key components of the wet end rebuild: a new two-layer headbox and vacuum assisted forming board for middle ply. The rebuild increases the end product quality and enables the mill to produce four-ply containerboard with help of Valmet's new innovative headbox technology.

First implementation of Valmet's OptiFlo headbox with Aqua layering technology

"Valmet's new OptiFlo headbox with Aqua layering technology opens us new possibilities to develop our process and product. We have already seen the potential of the technology on how strength properties can be improved. Unlike with conventional technologies, a rapid starch feeding response can be measured when starch is fed through Aqua layer; in both cases 15% compression strength (RCT) improvement is achieved, but needed amount of starch is almost 30% lower with Aqua technology. Even in chemically challenging process conditions, the technology enables great results," Jin Doo Kim, Vice President, Dong Il Paper.

"Dong Il Paper Group is a forerunner in adopting new technologies, and they have been actively involved in developing new solutions for the paper industry with us. We are delighted to see Dong Il Paper realize the benefits of the new Aqua layering technology as the first in the industry," Hannu T. Pietilä, Area President, Asia Pacific, says.

Information about OptiFlo headbox with new Aqua layering technology

Valmet's new OptiFlo headbox with innovative Aqua layering technology makes it possible to produce a two-layer sheet with very good layer coverage using only one headbox and forming unit. The Aqua layering technology is developed for the most challenging stratified solutions where layer purity is a key feature. It produces a perfect, disturbance free purely layered structure that boosts strength properties.

In containerboard grades, this type of layering provides further possibilities to adjust the quality and strength properties. It enables the use of different furnish qualities, cheaper raw materials and functional additives between layers while giving flexibility to develop improved end products.

About Dong Il Paper Manufacturing Co., Ltd

Dong Il Paper Manufacturing Co., Ltd. is a privately-owned paper company established in South Korea in 1986. The company has four paper mill sites in Ansan, Wolsan, Uiryeong and Dongwon which produce various containerboard grades such as liner, test liner and corrugated medium.

VALMET CORPORATION
Corporate Communications

Further information, please contact:
Sami Anttilainen, Vice President, Technology Valmet, tel. +358 40 768 7854
Hannu T Pietilä, Area President, Asia Pacific, Valmet, tel. +66 (0)81 862 1122

Valmet Corporation is a leading global developer and supplier of services and technologies for the pulp, paper and energy industries. Our 11,000 professionals around the world work close to our customers and are committed to moving our customers' performance forward - every day.

Valmet's services cover everything from maintenance outsourcing to mill and plant improvements and spare parts. Our strong technology offering includes entire pulp mills, tissue, board and paper production lines, as well as power plants for bio-energy production.

The company has over 200 years of industrial history and was reborn through the demerger of the pulp, paper and power businesses from Metso Group in December 2013. Valmet's net sales in 2013 were approximately EUR 2.6 billion. Valmet's objective is to become the global champion in serving its customers.

Valmet's head office is in Espoo, Finland and its shares are listed on the NASDAQ OMX Helsinki Ltd.

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