2013 September JAPAN TAPPI JOURNAL
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2013 September JAPAN TAPPI JOURNAL

Vol.67, No.9 Abstracts


Measures against Profit Improvement of Folio Sheet Cutter

Kenji Nakano
Nichinan Mill, Oji Paper Co., Ltd.

  In the Folio sheet cutter of our factory, because jamming occurred when adsorption timing of sheet slipped off in a suction box part, we adjusted a timing at the change of dimension and change of shifts. Because products exhausted at this time, it became the factor of a decrease in product yield. In addition, because the jumping out of the sheet occurs to a product when we adjust a timing, it was necessary to sort a product. Therefore we installed an image processing device and worked on loss reduction.


Operating Experience of New Sheet Finishing Machines
- Sheet Cutter・ Ream Wrapping Machine・ Skid Wrapping Machine-

Shigeyoshi Tsutsui
Hokuetsu Kamiseisen Co. Ltd.

  Japanese paper companies have to enhance the export with international competitiveness due to the decline of the domestic demand. According with the export strategy of Hokuetsu Kishu Paper, Hokuetsu Kamiseisen has built up the machinery. We target the export sheet paper that is in a good demand. Export sheet paper is relatively small, that affects the cut efficiency. In choosing the machines, strong wrapping that endures the marine shipment is also an important point. Machines we introduce are as follows, Pasaban-made 2 sheet cutter machines operated since 2013 spring, Maruishi-made 1 ream wrapping machine operated since 2012 autumn, JTEC-made 1 skid wrapping machine operated since 2012 spring. We report the operating experiences of new sheet finishing machines.


Latest DIENES Slitting Systems

Isamu Tobari
Engineering Depar., Mack 3 Enterprises, Inc.

  Since 1913, Dienes Werke has meant outstanding quality, expertise and breakthrough innovations in the field of industrial slitting technology. Dienes is the worldwide leading supplier of circular and straight knives, knife holders and slitting systems as well as competent partner for all related services. Standard knife holders often do not meet varying customer requirements nor very special applications. The Dienes slitting laboratory will test cut materials with a variety of different holders and knife desings in order to determine the best solution for long term performance, functionality, and user friendness.


Recent Trends in Coating Pigment Use and Formulation Practice in Asia and Western Markets

Etsuya Misawa
IMERYS MINERALS JAPAN K.K.
Chris Nutbeem
IMERYS Minerals Ltd.

  Pigment use and formulation practice in coated papers has seen marked changes in the past 40 years. In general the trend was for coatings to become increasingly more sophisticated in order to meet the advertising world’s need for better visual image. That together with machinery advances had driven significant pigment developments up until the mid-2000’s.
  Now, however, the world has changed. The global downturn in 2008/9 together with ever increasing competition between print and digital media has fundamentally changed the global paper industry. It is clear that cost is now the main driver affecting coating recipe design and developments focused purely on improving quality are now largely a thing of the past.
  In this paper we explore the changes in the global and Asian paper markets that have occurred since the peak in 2007 and how these changes have affected pigment demand, pigment use and formulation design.
  We conclude by looking at what this could mean for future pigment demand and show how kaolin, which has declined recently in recipes, can still bring value to paper making.


Development in Strength Enhancement

Shintaro Nakayama, Patrik Simonson, Joakim Carlén
and Michael Persson
Pulp and Performance Chemicals Division, Akzonobel K.K.

  With pulp prices being high, fine paper makers looking to reduce costs are constantly trying to increase the filler level in their paper. The optical properties will often benefit from increased filler content but the mechanical properties will deteriorate and the retention can be difficult to maintain. The reasons for a weaker paper sheet in a highly filled paper are fewer fibres per unit volume paper and filler particles interfering and disturbing the formation of fibre/fibre bonds plus the risk of filler particles creating defects in the paper material 1). Besides elevating fibre cost, the deteriorating quality of raw material has rapidly increase the need of strength enhancement additive .The amount of paper and board that is being recycled is increasing and therefore rapidly decreasing the amount of fresh fibre addition. Addition to the above mentioned strength deteriorating factor, the drive to decrease the basis weight of both paper and board has also directly impact on higher strength enhancement requirement.
  In order to answer the needs of the paper and board industry on strength enhancement, our goal is to increase the in-plane and out-of-plane strength by 20 and 30% respectively or decreasing basis weight of packaging material by 10-15%.
  To achieve higher filler levels and maintain or improve the quality of the paper a new concept has been developed, the so-called EcoFill™ system. EcoFill™ consists of a filler modification system, including an on-line filler treatment system, with charge control additives and an engineered cellulose additive. The engineered cellulose additive (ECA) improves the bonding at the interface between the filler particles and between the filler and fiber in the sheet. This gives significant internal bond improvements. The charge control components enable a good bonding between the filler and the ECA and secures that the wet-end conditions are stable for optimum performance of other wet-end additives such as sizing agents.


Moisture Measuring System by Dielectric Property

Shinichi Kitagawa
Group Technology Div., Oji Engineering Co. Ltd.

  The infrared method is the most popular to measure the moisture content in the coated layer on the paper sheets or polymer films. But this method is not suitable for measuring only a little moisture content, for example less than 1 %, with high accuracy because of the influence of the disturbance such as heat source. It is also affected by the color of the sample in principle. In order to solve these problems, a new moisture analyzer using a microwave resonator has been developed. This is based on the difference of the dielectric loss between the water and the paper sheets or polymer films. This report describes the measurement principle, some data and a few applications of the new moisture analyzer.


Our Vision of Sophisticated Color-Web Inspection System for Paper Production

Jun Ikeuchi
Inspection Systems Business Div., Omron Corporation

  Recently,  Web Inspection System  (WIS) has been expected to enhance the quality of paper production with the highest efficiency. OMRON has developed Color-WIS over the past 20 years. As a result, we are able to apply our Color-WIS in various kinds of paper. Today, we would like to show you our original solutions and values that Color-WIS can provide on site, and indicate an application possibility with our patent technology.


Improvement of Paper Properties and Reduction of  Environmental Load by a New Starch Fixing Technology

Yuko Okusa, Chigusa Taguchi and Hiroyuki Suzuki
Kurita Water Industries Ltd.

  Base weight reduction is a very useful way for many board manufactures to save natural resource, and reduce carbon dioxide emission. But in the mean time, the cost is increasing because more starch or other dry strength agent is needed for keeping the same sheet strength. This paper aimed at how to effectively use the starch resource in the raw material of old corrugated container, which is contented of several percent of corrugating adhesive starch. However, the starch is usually difficult to retentive and easily bio-degraded in the paper making process. It could be solved by a properly designed microbe control system and a new developed starch fixing agent. As a result of mill trial, not only improvement of the sheet strength but also a lower COD in the effluent was achieved.


Current Techniques for Pest Control in Paper Mills

Masahiko Konishi
Sales Department, Ikari Corporation

  Recently, many paper mills have been monitored the abundance and distribution of insects as a part of pest control inside of each factory. The light traps with sticky sheets are often used in monitoring of insects. In generally, the sticky sheets are replaced approximately every one month, and collected insects are counted and identified by technician. Pest Control Operators (PCO) have been controlled the insects based on the results of monitoring and worked to maintain and improve the sanitation management of the production area. However, because of response to growing safety awareness of consumers from year to year, PCO are necessary to control the insects by more rapid and lower environmental impact.
  In this paper, I elucidate the efficient original monitoring methods and effective original control methods in various manufacturing factories including paper mills.


European Patent with Unitary Effect and Unified Patent Court

Toshinao Yamazaki and Hiroshi Kawamata
Japan Patent Office
Atsuya Takeshita
Cabinet Plasseraud

  The long-awaited legal framework to establish the European Patent with Unitary Effect and Unified Patent Court was concluded in February, 2013. The Unitary Patent package is composed of two EU Regulations for Unitary Patent and one Agreement for Unified Patent Court.
  While some users look forward to the new patent system because it is believed to be more convenient and more effective than the current European patent system, some users are concerned about the complexity and uncertainty. In order for Japanese users to become more familiar with it, this article illustrates the background of the discussion and overview of the Unitary Patent package.
  Unlike the classical European Patent, which is so-called "the bundle of national patents," the Unitary Patent will bring a unitary effect within the territory of all the participating member states and it seems to become an efficient tool if an applicant needs to acquire the patent protection in many states in Europe. However, the procedure of the Unitary Patent from filing to registration will be done before the European Patent Office, based on the European Patent Convention. Thus, the examination process of the Unitary Patent, basically, will not be different from that of the classical European Patent.
   The Unified Patent Court is a new centralized patent litigation system in Europe and will have the exclusive jurisdiction for any infringement cases and revocation cases of both the Unitary Patent and the classical European Patents after the 7 years or 14 years of transitional period.
  The Unitary Patent and Unified Patent Court are hoped to become one of the useful tools for Japanese users who run the business in broad areas in Europe as well as European users.


Corporate Profile & Product Information (5)
NOMURA SHOJI CO., LTD.

  Nomurashoji was established in 1962, and have been chiefly handling the various testing equipment and tools, to be used for the quality improvement for the pulp and paper industry in Japan over half a century.
  Our basic business strategy has been to provide not only the equipment itself but also extend the technical assistance including follow up service after the delivery is completed.
  As the market environment of pulp and paper industry in Japan has been dramatically changed for the past decade, we endeavored to identify the market needs and made the necessary information available in the overseas countries for our customers.
  We now would like to introduce ourselves with the brief company history and the current products line as below.


Research Report
Radical Trapping Mechanism of Mannitol in Fenton Reactions

Kengo Magara and Tsutomu Ikeda
Forestry and Forest Products Research Institute

  Mannitol is a well-known radical trapping reagent, though the trapping effect is difficult to confirm in a Fenton reaction. Under acidic conditions, mannitol was consumed during the Fenton reaction, as well as other substrates, such as vanillyl alcohol, veratryl alcohol and Methyl-β-D-glucopyranoside. Under alkaline conditions, however, only mannitol was consumed during the reaction.
  When we investigated the solubility of iron (Ⅱ) and (Ⅲ), which work as catalysts to initiate the Fenton reaction, the addition of mannitol was found to help dissolve the iron compounds in alkaline solution, especially those exceeding pH 10, though iron compounds are not soluble under such alkaline conditions. Based on this result, mannitol is considered to form a complex with iron (Ⅱ) and (Ⅲ) ions under these conditions and the hydroxyl radical (HO・) generated by the reaction between hydrogen peroxide and iron (Ⅱ) and (Ⅲ) complex of mannitol will attack the mannitol because it is the compound nearest the site where the HO・ is generated.