JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 35, Issue 11
Displaying 1-9 of 9 articles from this issue
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  • Trends of Imaging Technology and It's Related Paper
    Mitsuo Kaji
    1981 Volume 35 Issue 11 Pages 945-950
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.945
    JOURNAL FREE ACCESS
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    This paper describs the recent and future trends of image and information technology which were viewed from points of the printing technics of newspaper, technical revolution of printing systems and new technical trends of image transfer system containing reprographic hardware.
    1. Role of newspaper as mass communication media has been shifted to another processes such as radio or television.
    2. Reproduction technology from information to imaging in newspaper has been rapidly transfered to Computerized Type-setting System (CTS).
    3. New information propagating service systems to homelife, education, amusement and social informations etc, has been developed in mordern life society.
    4. It is setimated that the reprographic technology futher advances in future, especially, application of heat sensitive paper for home facsimile copia fields shall increase to another reprographic papers.
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  • Recent and Future Technical Trends of Reprographic Paper
    Koichi Nakamura
    1981 Volume 35 Issue 11 Pages 951-957
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.951
    JOURNAL FREE ACCESS
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    This paper consist of four contents containing the general survey of reprographic processes, various uses and technical forcasting of reprographic paper as well as its hardware and today's technical informations from view points of recent published patents.
    Several critical comments and future trends on reprographic paper were refered to informations which were given from investigated results of Japanese Forcasting Association of Pulp and Paper Technology in 1978.
    Finally, the representative informations of recent image transfer technologies picked up from numerous Japanese patents between 1976 and 1980 were presented.
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  • [title in Japanese]
    1981 Volume 35 Issue 11 Pages 958
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.958
    JOURNAL FREE ACCESS
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  • Panell Discussions; Forecasting a Future Trend of the Treatment of Industrial Wastes
    [in Japanese]
    1981 Volume 35 Issue 11 Pages 959-969
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.959
    JOURNAL FREE ACCESS
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  • Pulp and Paper Mills in Japan (38)
    Fuji Mill, Honshu Paper Co., Ltd.
    Honshu Paper Co. Ltd.
    1981 Volume 35 Issue 11 Pages 970-982
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.970
    JOURNAL FREE ACCESS
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    Fuji City, located at the foot of Mount Fuji, has been famous for paper manufacturing since ancient days and now more than 100 paper mills are in operation there.
    Honshu Paper Co., Ltd.'s Fuji Mill, located in the west part of Fuji City, started its operation in 1908.
    The mill has 6 paperboard machines (4 cylinder machines, 2 combination machines), 3 paper machines (2 Fourdrinier machines, 1 vertiformer machine), and 1 coater. Its products are 528 tons per day of coated board, 239 tons per day of printing paper and 159 tons per day of coated paper.
    The mill has waste paper equipment instead of pulping equipment such as KP, TMP or CGP.
    The mill has an area of 600, 000 m2, which not only contains the paper machine and equipment mentioned above, but also a pulp molding plant, a paperboard converting plant and an ironworks in the same area. There are about 1, 100 employees.
    The waste water from the mill is treated with an activated sludge process, 4 clarifiers and sludge incineration equipment.
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  • Tensile Properties and Bonded Area of Paper
    Susumu Kashiwabara
    1981 Volume 35 Issue 11 Pages 983-990
    Published: November 01, 1981
    Released on J-STAGE: January 29, 2010
    DOIhttps://doi.org/10.2524/jtappij.35.983
    JOURNAL FREE ACCESS
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    The relationships between tensile properties and the bonded area of paper were studied by correlation analysis and graphically represented.
    The squares of tensile strength and breaking length or tensile energy absorption are highly correlated with the bonded area of paper.
    The regression lines, represented graphically, almost showed linear relations. By introducing the survey of rupture energy into the analysis of mechanical properties of paper, it was found that, in many cases, linear relations exist between the rupture energies and bonding areas of paper.
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  • Alkaline Pulping of Destructured Chips
    Tsuneo Yoshida, Raysabro Oye, Takayuki Okayama, Hiroshi Mai
    1981 Volume 35 Issue 11 Pages 991-1003
    Published: November 01, 1981
    Released on J-STAGE: January 29, 2010
    DOIhttps://doi.org/10.2524/jtappij.35.991
    JOURNAL FREE ACCESS
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    Some eucalyptus species from Western Australia contain high amount of polyphenols to give a lower pulp yield by alkaline cooking. H. G. Higgins has suggested that destruction of chips by passing between two rolls of different peripherical speeds improves pulping.
    This study has been carried out to improve pulp yields and delignification of chips from above species. Mill chips of E. marginata, mixture of E. calophylla and E. diversicolor and mixture of domestic hardwood species were destructured passing through two rolls of 8″ diameter, of which rotation were 24.8 and 32.2 rpm respectively at clearance of 1.6, 1.3, 1.0 and 0.7 mm. Bulk density of treated chips were increased about 10 to 25%.
    It was obiously observed that screened yields of sulphate pulps at the same Kappa number were improved by destruction treatment. As far as pulp strengths, over-destructured chips by 0.7 mm clearance of rolls showed some damages due to reduction of fibre length. However, strengths of handsheets seemed not so lowered in case of some moderate roll clearances.
    Destruction treatments induced fissures in chips, however, the pore or void volume in chips measured by the mercury penetration revealed that chips were significantly densified. Further investigations are to be needed.
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  • [title in Japanese]
    Eugene R. Baker
    1981 Volume 35 Issue 11 Pages 1004-1008
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.1004
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1981 Volume 35 Issue 11 Pages 1009
    Published: November 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.1009
    JOURNAL FREE ACCESS
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