JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
Volume 41, Issue 3
Displaying 1-8 of 8 articles from this issue
  • Tsutomu Naito, Hideki Fujiwara, Koichi Nakamura
    1987 Volume 41 Issue 3 Pages 201-214
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    This paper describes an overview of the laboratory automation which is broken down into the two categories:(1) the automatic data acquisition system and laboratory information management system, and (2) the laboratory robotics. After the review, commercial automation systems for paper testing laboratory using these fundamental systems are shown from a user's point of view. System performance characteristics and some guidelines for automating the laboratory functions are also discussed.
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  • Toshiyasu Nishioka, Tetsuo Ishikawa, Akira Uchida
    1987 Volume 41 Issue 3 Pages 215-223
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    Nowadays, sheet or web offset printing is a mainstream of multi-color printing in Japan. So, mottling-free multi-color printing is getting more important and more difficult with an increase in printing speed.
    In this paper, mottling problems are investigated with emphasis on the causes and remedies for them within coating and drying processes of coated paper production, as well as on suitable SBR latex designs for mottling-free coated paper.
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  • C onference on Instrumentation and Automation in the Paper, Rubber Plastics, and Polymerization Industries
    Akira Nomoto
    1987 Volume 41 Issue 3 Pages 224-228
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
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  • 5-Soda Quinone Pulping with Direct Causticized White Liquor by Ferric Oxide
    Tokiya Yaguchi, Haruo Tsukamoto, Tatsuo Nakano, Michihiro Nakura
    1987 Volume 41 Issue 3 Pages 241-248
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    Laboratory studies in soda quinone pulping of Douglas fir, pine (Akamatsu), eucalyptus and beech with direct causticized white liquor by ferric oxide (hereafter referred to as regenerated white liquor) were carried out in comparison with reagent white liquor pulping. Regenerated white liquor was made from hydrolysis of burning products of soda quinone pulping black liquor of softwoods and ferric oxide, and DDA (1, 4-dihydro-9, 10-dihydroxyanthracene sodium salt) was used as quinone with addition of 0.1% as AQ by weight on o.d. wood. Pulp yield and active alkali charge of regenerated and reagent white liquor pulping were almost equal at same Kappa number except eucalyptus pulp. Soda quinone pulping of eucalyptus was slightly disturbed by soluble aluminium salt in white liquor. Between regenerated and reagent white liquor, there were almost equal bleachability, pulp properties and Fe content of soda quinone pulp of four wood species.
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  • Hiroki Nanko, Shun-ichiro Mukoyoshi, Junji Ohsawa
    1987 Volume 41 Issue 3 Pages 249-254
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    An attachment to the standard laboratory sheet machine which enables easy and quick formation of multi-layered handsheet was designed and constructed in our laboratory. The divice named JPRI Multi-head consists of an acrylic cylinder with 4 perforated plates. It should be fixed on top of handsheet machine cylinder.
    Multi-head attachment enables easy control of number of layers and basis weight of each layer. Multi-layered papers made by using this device give good formation and strong plybonding. Multi-head is useful for simulating and predicting some properties of machine made multi-layered papers using a single headbox of multi-layer capability.
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  • Hiroji Shibazaki, Torao Fujita, Kazuhiko Ishimoto, Sounosuke Kawasaki
    1987 Volume 41 Issue 3 Pages 255-265
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    Calcium carbonates, which contribute the improvement of the optical properties and printabilities to paper, are generally used for paper coating pigments as well as kaolin clay.
    In this paper, the surface smoothness of coated paper with various calcium carbonates have been evaluated by two instruments.
    One is the instrument which measures the value in terms of Rp (printing roughness). The Rp value determined by the optical contact method, represents the surface smoothness of paper in contact with prism surface under the pressure.
    The other is the instrument which measures the three dimensional roughness by stylus method.
    The results obtained with the two instruments represent that coated paper with cubical calcium carbonate having 11.5m2/g BET specific surface area showed the highest smoothness among them, including those coated with kaolin clay which was prepared for comparison purpose. Rp value has the positive correlation with the average particle size of calcium carbonate, and the gloss of coated paper.
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  • 1987 Volume 41 Issue 3 Pages 266
    Published: March 01, 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    Download PDF (250K)
  • 1987 Volume 41 Issue 3 Pages 292
    Published: 1987
    Released on J-STAGE: October 27, 2010
    JOURNAL FREE ACCESS
    Download PDF (149K)
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