JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 61, Issue 11
Displaying 1-16 of 16 articles from this issue
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Papermaking Technology I
  • [title in Japanese]
    [in Japanese]
    2007 Volume 61 Issue 11 Pages 1299
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1299
    JOURNAL FREE ACCESS
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  • The Newest Finishing Equipment
    Toshio Aoki
    2007 Volume 61 Issue 11 Pages 1300-1307
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1300
    JOURNAL FREE ACCESS
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    Maruishi has been making an unlimited effort to develop the best modern finishing equipment. In addition, Maruishi has many technology partner ship such bielomatik-Jagenberg GmbH, Trancel AB, Saimatec Engineering, Function Control BV, total 11 world-famous companies. In the rapidly changing international market today, End users are demanding the high Quality, High productivities. Maruishi would like to introduce from the Automatic Roll Storage System until Automatic Truck loading⁄Unloading system which we can make a large contribution of this Paper industry.
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  • The Efficiency Progress with Sheet Sorting
    Hiromu Nakamura
    2007 Volume 61 Issue 11 Pages 1308-1311
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1308
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    This is the following report that was told as “The Approach for No Manual Sorting System-The labor-saving history in sheet finishing process” at Japan TAPPI Annual Meeting in 2006. The previous report dealt with paper finishing without resorting based on “the quality verification activity”. In this report, the labor-saving strategy by finishing line renewal is described. The labor-saving is achieved by the combination of the quality verification chain and the latest paper finishing machinery.
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  • Advanced On-line Multinip Calender
    Hidehiko Yamazaki, Juha Linja
    2007 Volume 61 Issue 11 Pages 1312-1319
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1312
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    OptiLoad calender is a new generation multinip calender of Metso paper. The advances in both mechanical and process technologies have made it possible to achieve high quality-surface finishing at high speed. OptiLoad has its own special features such as specially designed roll-weight relieving mechanism, application of high-temperature thermo roll, special roll configuration, uniform nip load through top to bottom roll and so forth.
    Metso Paper has delivered more than 50 OptiLoad calenders with on-line and off-line. Nowadays, wide range of the application is admitted with related technology development. In this paper, the multinip calender technologies for on-line application for coated paper grades and non-coated paper grades such as SC paper are described.
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  • Operating Experience of Janus Calender
    Junichi Kanayama
    2007 Volume 61 Issue 11 Pages 1320-1323
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1320
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    The N-1 Coater Machine at Yonago mill, Oji Paper, has been operating since September 1997. The coating width of this coater machine is 7,290 mm and the design coating speed is 1,600 m⁄min, it produces 835 tpd of woodfree coated paper.
    The Janus Calender has installed next to the coating section as an on-line supercalender, which was the first case in the world. For the purpose of adopting on-line supercalender was to reduce initial investments and maintenance costs, to achieve higher personnel productivity, and to produce coated paper of better quality. This Janus Calender consists of 2 stacks with each 5 rolls, it can get the quality that is similar to an off-line supercalender. This article introduces the latest operating experiences of the N-1 Coater Machine and the Janus Calender.
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  • Operating Experience of Iwakuni PM 9 On-line Hot Softnip Calender
    Kiminobu Kakino
    2007 Volume 61 Issue 11 Pages 1324-1328
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1324
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    The start-up of No. 9 paper machine of Iwakuni Mill was in 1997, a decade ago. Currently, its capacity is approximately 700 metric ton per day for woodfree LWC paper (A 3 grade) . To obtain higher productivity, the No. 9 paper machine was designed as a conbination model of paper machine and coater. It’s also equipped with Hot Softnip calendar (4 stucks) to achieve high temperature and high pressure finishing process.
    This report is a summery of the operating experience about vertical four stucks Hot Softnip calender.
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  • Slitting of Core Paper
    -Cost Saving and Slitting Quality Improvement through Slitting Process Automation-
    Heinz Herkenrath
    2007 Volume 61 Issue 11 Pages 1329-1332
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1329
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    Slitting technology has been subject to rapid developments in recent years. With today’s top-quality tools, slitting at higher speeds is no longer wishful thinking. At the same time, better results are achieved in terms of edge quality, dust generation and knife service life. This means, that in many existing slitting systems, there is an enormous efficiency and cost-saving potential, which should be tapped by applying state of the art technologies.
    The history of continuous slitting goes back to 150 years and Dienes has been involved in making this history for at least half of that period. This is documented by numerous national and international patents.
    Dienes’ scope of supply includes the respective slitting tools like dished, top and bottom knives as well as multiple knife blocks of different material quality and surface finish and last but not least knife positioning systems in manual, semi- or fully-automatic design.
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  • Operating Experience of New Slitting System at PM 7 Winder
    Yasuhide Hirota
    2007 Volume 61 Issue 11 Pages 1333-1337
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1333
    JOURNAL FREE ACCESS
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    In January 2005, and after a two year rebuilding program concentrated on improvements to the production system, Oji Sobue restarted paper machine # 7 producing Linerboard. The main objective of this rebuild program was to introduce the latest technologies available to the industry to maximize production efficiencies with special emphasis on the newest Slitting positioning system developed by German machine manufacture. This slitting positioning system was the first one of its kind installed in Japan. The improvements of the slitting system have reduced substantially the number of mechanical breakdowns and machine stoppages, while dramatically improving slitting accuracy, quality and cleanliness while practically eliminating any dust problems, which previously were an area of great concern to Oji Sobue.
    These improvements helped reduce operating costs and improve quality with fewer blade changes easier maintenance and operator friendly interfaces, the solution of the dust problems contributed for the elimination of a dust collecting system, thus also contributing for significant energy savings.
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  • VariPlus Single Drum Winder for WFC Grade
    Michio Takahashi
    2007 Volume 61 Issue 11 Pages 1338-1342
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1338
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    The single drum winding is better winding solution for high density and smooth product. Especially WFC paper grade requires premium quality of roll hardness structure without any winding faults. On the single drum winder, each paper roll is wound in a separate station and supported on a single drum. Each winding station is practically a separate machine. Therefore this type of winder is technologically predestined for various ranges of paper grades and product needs. However, operation resources and high maintenance was required. The VariPlus single drum concept has been thoroughly modernized with a much higher degree of automation. We Voith aim thereby to enhance machine productivity by increasing operating speed without risk and optimizing automation for greatest reliability and time savings.
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  • Enhanced Use of Advanced Web Inspection System and Winder Advisor System
    Atsushi Kurosaki
    2007 Volume 61 Issue 11 Pages 1343-1346
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1343
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    Cognex developed “SmartLearn®”, a useful l classification tool. It was designed such that the latest learning classification technology can be combined with expert knowledge of each application. SmartLearn dramatically improves defect classification accuracy.
    The usage of “AWA (Advanced Winder Advisor) ” further streamlines the re-reeling process. Automatic and accurate stopping at desired defect positions improves winder operation not seen before.
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Topics & Information
Research Report (Original Paper)
  • Development of Manufacturing Process for High Quality Calcium Carbonate by Causticizing Process in a Kraft Pulp Mill (Part 3)
    -Scale-up Trials at Pilot and Mill Plant for Rice-like Particles-
    Yasunori Nanri, Haruo Konno, Hideyuki Goto, Yasuhiro Okamoto, Kazuto T ...
    2007 Volume 61 Issue 11 Pages 1356-1366
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1356
    JOURNAL FREE ACCESS
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    Precipitated calcium carbonate is produced as a by-product in the causticizing process of the kraft pulping process. There are many advantages to use this by-product, causticizing calcium carbonate (CCC) , as filler and coating pigment in paper. By using this CCC for paper materials, lime-kiln operation would be reduced or eliminated, resulting in the reduction of fuel oil for calcination of calcium carbonate. Furthermore, accumulated impurities in the lime cycle can be removed constantly. In our previous reports, we showed that CCC particles with a various kind of morphology were obtained by separating and precisely controlling the two reactions of slaking and causticizing in the causticizing process. Among these morphologies, rice-like particles can be produced with the least process modification. Then, production trials at laboratory, pilot, and mill scale plant were carried out to investigate the possibility of production of the rice-like CCC at mill.
    Since main purpose of causticizing process is to produce white liquor, the white liquor separation from the CCC slurry is very important for kraft pulp production. To increase the particle size of CCC is one of the most promising way to accelerate the white liquor separation. Therefore, the production methods of the secondary particles having larger particle size were investigated by the step-wise addition and the continuous addition of slaked lime slurry and green liquor against the primary particle. In this paper, results of the production trails of the rice-like CCC at laboratory, pilot, and mill scale plant are reported.
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  • Influence of Cooking Conditions on Pulp Properties of Acacia auriculiformis in Kraft Pulping
    M. Sarwar Jahan, R. Sabina, A. Rubaiyat
    2007 Volume 61 Issue 11 Pages 1367-1375
    Published: 2007
    Released on J-STAGE: June 21, 2011
    DOIhttps://doi.org/10.2524/jtappij.61.1367
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    Acacia auriculiformis was subjected to kraft pulping by varying operational variables, such as time, temperature, and active alkali charge. A central composite design was used to investigate the influence of operational conditions on the pulp properties (total pulp yield, screened pulp yield, kappa number tensile index, burst index and tear index) . A second order polynomial model consisting of three independent variables was found to accurately describe the kraft pulping of Acacia auriculiformis. The minimum R2 value was above 0.94, which supported well fitting in the proposed equation. The values of screened pulp yield, total pulp yield, kappa number, tensile index, burst index and tear index at the central point of operational variables were 43.5%, 44.6%, 26.1, 41.7 N.m⁄g, 3.3 kPa.m2⁄g and 12.3 mN.m2⁄g, respectively, which are within the vicinity of predicted value.
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Pulp and Paper Mills in Japan (74)
Coffee break
Papyrus
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