JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 48, Issue 5
Displaying 1-11 of 11 articles from this issue
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  • Industrial Science, Technology and Creation
    Junichi Nishizawa
    1994 Volume 48 Issue 5 Pages 643-657
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.643
    JOURNAL FREE ACCESS
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  • Strength Development from polymer Additives for Paper
    Hiroo Tanaka
    1994 Volume 48 Issue 5 Pages 658-666
    Published: May 01, 1994
    Released on J-STAGE: February 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.658
    JOURNAL FREE ACCESS
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    The hydrogen bonds between cellulose surfaces, cellulose and polymer additives, and polymer additives themselves are the most important factor for dry strength of paper. The nature of hydrogen bonding and the maximum strength attained by the paper strengthen agents are discussed briefly first. Then cationic starch, natural gum and acrylamide-based polymers are referred. Finally, emphasis is placed to reactive polymer additives for achieving the much higher effect.
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  • High Definition Printing
    Hitoshi Isono
    1994 Volume 48 Issue 5 Pages 667-676
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.667
    JOURNAL FREE ACCESS
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    Screen ruling for offset printings used to be 175 lines/inch (lpi) at most, but high definition printing which uses finer ruling (300-1, 000 lpi) to achieve high print quality has become hot issues for several years in Japan. It is moving from a trial stage to commercial use ; It is now often seen in the high-quality printings and this current will continue.
    This paper is to describe today's trend of the high definition printing and its influence on print quality. Technical subjects are also mentioned regarding to film-making, plate-making, and printing process along with the quality of paper required for the high definition printing.
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  • Amphoteric Latex and Application
    Toshio Koike
    1994 Volume 48 Issue 5 Pages 677-687
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.677
    JOURNAL FREE ACCESS
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    It is known that the water absorptivity of paper greatly affects the receptivity of inks of the second and subsequent colors due to the use of wetting water in lithography.
    It the drying section of the coater, the migration of the binder to the surface of the coatings occurs. This often results in insufficient water absorption and poor ink receptivity of the coated paper.
    Optical properties and printability was evaluated for coated papers prepared by using coating color containing amphoteric or anionic latex having the same composition of monomers but with different surface charge groups.
    The amphoteric latex-based coated paper can be characterised by the following features as compared with the anionic latex-based paper.
    These favorable features of amphoteric latex-based coated paper are considered to stem from the electrostatic interaction among latex particles, clay, and the fibers on the surface of base paper, through the prevention of binder migration to the surface of coating layer and permeation of binder into the base paper.
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  • Report on 2nd Research Forum on Recycling
    Hiromichi Takahashi
    1994 Volume 48 Issue 5 Pages 688-697
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.688
    JOURNAL FREE ACCESS
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  • Recent Development of Instrumentation in Pulp and Paper Industry
    Solutions provided by Toei Denshi Kogyo, Ltd. and OMRON, Ltd.
    [in Japanese]
    1994 Volume 48 Issue 5 Pages 698-704
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.698
    JOURNAL FREE ACCESS
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    This serial report describes current topics in pulp and paper process instrumentation technology, and this paper focuses on the paper sheet fault detection technology that Toei denshi Kogyo, Ltd and OMRON, Ltd. provide for the pulp and paper industry.
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  • 1993 Research Projects of Universities and Government Research Institutes
    Wood Science Committee
    1994 Volume 48 Issue 5 Pages 705-712
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.705
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • Nagaoka Mill, Hokuetsu Paper Mills., Ltd.
    1994 Volume 48 Issue 5 Pages 722-728
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.722
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1994 Volume 48 Issue 5 Pages 729
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.729
    JOURNAL FREE ACCESS
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  • Development and application of dynamic scanning absorptometer
    Automation and improvement of Bristow measurement
    Shigenori Kuga, Hiroshi Kataoka, Toshiharu Enomae, Fumihiko Onabe, Nob ...
    1994 Volume 48 Issue 5 Pages 730-734
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2009
    DOIhttps://doi.org/10.2524/jtappij.48.730
    JOURNAL FREE ACCESS
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    A new apparatus (dynamic scanning absorptometer ; DSA) has been developed for analyzing short-time liquid absorption behaviors of paper. It involves a computer-controlled turntable mechanism holding the paper specimen, onto which a liquid supply head is contacted. The rate of liquid absorption is measured by optically tracking the motion of meniscus in the glass capillary connected to the supply head. The results are analyzed and graphically displayed by computer in real time. Thus the apparatus provides a quick (5-15 min for an entire plot) and fully automated version of the Bristow absorption measurement, using a single sheet specimen of ca. 20 cm × 20 cm. The results of DSA measurement using distilled water and dilute dye solutions agreed well with each other and with those of the Bristow measurement, except for 10-20% greater values with the former in the long contact time regions for the hardsized paper. This discrepancy is considered to reflect overestimation of wetted area in the Bristow measurement, resulting from unevenness of liquid application caused by surface tension effect in the liquid supply head. The DSA is applicable also to nonaqueous or viscous liquids as test liquids.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    1994 Volume 48 Issue 5 Pages 735-739
    Published: May 01, 1994
    Released on J-STAGE: November 19, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.735
    JOURNAL FREE ACCESS
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