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Matsumoto Mill of Honshu Paper Co., Ltd. manufactures solely corrugated containerboard ; kraft liner, jute liner, color liner and white linerThis mill, which is located in the western region of Matsumoto City, Nagano Prefecture, central part of Japan, started up in 1933 as “Matsumoto Shoshi Kogyosho” (Matsumoto Papermaking Factory) and changed its name to “Toshin Paper Co.” in 1943.Matsumoto Mill now has 2 paper machines and its production is 330 tons per day of corrugated containerboard.The mill site area is about 61, 000m2 and the number of employees is about 230.The wastewater from the mill is treated by a clarifier, flotation equipment, an aeration system for BOD treatment, and a sludge incinerator. Flue gas is treated by a water scrubber.

Hydrophobic properties were conferred to a high-lignin-content Kraft pulp by a laccase-catalysed treatment in the presence of lauryl gallate (LG). The treatment resulted in a two-fold increase in contact angle and conferred water absorption resistance to the pulp. Kappa number was increased, indicating that some phenolic compounds were incorporated in the pulp. A control treatment with LG alone did not affect water absorption, demonstrating that laccase was essential to attain these new properties. The loss of hydrophobicity after an acetone Soxhlet extraction highlighted that adsorbed acetone-soluble compounds played a key role in the properties. GC-FID and HPSEC-UV analysis of the acetone extract indicated the formation of dodecanol and different phenolic oligomers. SEM images showed the treatment-induced changes in the fibre network. Additional experiments with various reaction times and reactant concentrations highlighted the role of LG oxidation products in the introduction of absorption resistance. (C) 2013 Elsevier B.V. All rights reserved.