JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
Search
Advanced search
OR
Browse
Search
Volume 32, Issue 7
Displaying 1-8 of 8 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
  • Inaugural Address
    Toshiro Kawaguchi
    1978 Volume 32 Issue 7 Pages 387-388
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_387
    JOURNAL FREE ACCESS
    Download PDF (1582K)
  • Effect of Tororoaoi Mucin on Japanese Paper Making
    Hisao Ishikawa
    1978 Volume 32 Issue 7 Pages 389-395
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_389
    JOURNAL FREE ACCESS
    Download PDF (2501K)
  • [title in Japanese]
    1978 Volume 32 Issue 7 Pages 396
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_396
    JOURNAL FREE ACCESS
    Download PDF (77K)
  • Summarization of Responses to Questionnaire Sent to Member Companies Concerning the Exhaust Gas Desulfurization of Hevy Oil Boilor
    J. TAPPI
    1978 Volume 32 Issue 7 Pages 397-402_3
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_397
    JOURNAL FREE ACCESS
    Download PDF (1955K)
  • Retention of Paper Stock Ingredients in Sheetforming Process Part. 2
    Factors affecting Filler Retention in the Dewatering Process at Paper Machine Wires
    Kazuya Nishikawa, Yoichi Inoue, Yasuo Fujioka, Shonosuke Takahashi
    1978 Volume 32 Issue 7 Pages 419-427
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_419
    JOURNAL FREE ACCESS
    Download PDF (1455K)
  • Studies on SO2 and MgSO4 Cooking Chemical-Cooking Conditions from Sprucewood
    Tsutomu Suzuki, Kunio Tosaka, Jisuke Hayashi
    1978 Volume 32 Issue 7 Pages 428-437
    Published: July 01, 1978
    Released on J-STAGE: January 22, 2010
    DOIhttps://doi.org/10.2524/jtappij.32.7_428
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Sprucewood chips were cooked with SO2 and MgSO4, liquor to examine chemical-cooking conditions; cooking temperature and time, and the amount of the chemicals. When the amount of the chemicals was held constant at SO2 28%+MgSO4 24% by an ovendry weight of chips, cocking time was required to be fully pulped for 4, 3, and 2hrs. at 150°, 160°, and 170°C, respectively. Pulps of good quality were, however, obtained in the temperature range of 150° and 160°C. With the cooking at 150°C for 4 hrs., the certain amount of chemicals needed to obtain chemical -pulps was found in the concentration of 28 to 32% SO2 and 24 to 35%-MgSO4, while that in the cooking at 160°C for 3 hrs. was 25 to 32% SO2 and 20 to 35% MgSO4. In the former cocking, the chemicals had no effect on pulp yield, but pulp properties were slightly affected by the amount of MgSO4. In the latter, paper strength and brightness varied with the amount of SO2 as well as MgSO4, though the yield was only dependent on the concentration of SO2. Characteristics of pulps obtained by SO2+MgSO4 cooking have been discussed, compared with those of Mg-base SP and KP.
    View full abstract
    Download PDF (1684K)
  • A New Simplified Method for the Determination of Carbon in Waste Paper and Deinked Pulp
    Akihiro Yada, Masukichi Nakamura, Toshio Yamazaki
    1978 Volume 32 Issue 7 Pages 438-442
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_438
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The Quantitative analysis of carbon derived from black printing ink in waste paper or deinked pulp has been made by microscopic measurements of its numbers and dimensions in a hand sheet pulp.
    However, this method has several disadvantages; the contents of carbon thus determined contain some non-carbon dirts, and this must be carried out on the pulp sheets and is usually accompanied by some observational errors.
    In order to solve these disadvantages, a new determination method, what is called, wet decomposition method has been developed.
    The principle of this method is as follows.
    (1) Dissolve materials except carbon in waste paper or deinked pulp by wet oxidation, and filter off dissolved materials.
    (2) The collected residue consisting mainly of carbon is washed, dried and measured for its blackness with an optical densitometer.
    A constant ratio has been observed between the carbon contents and the blackness density for the residue.
    Therefore, the carbon contents can be determined by measuring the density of blackness.
    Decomposition of non-carbon materials containing wood cellulose, lignin and others is done with a boiling concentrated nitric acid and perchloric acid for about one and half hour in a Kjeldahl flask.
    In this study, the carbon contents were compared on the samples before and after deinking waste news by the floatation method.
    By means of employing both the new and the conventional method, carbon and other non-carbon dirts in deinking pulp can be determined separately.
    This method, however, can not be applied for waste paper with the high content in ash because of their ash weight exceeding those of carbon in waste paper or deinked pulp.
    Therefore, the new method is suitable for samples with the low content in ash and applicable only for printed papers with black ink such as newspaper.
    View full abstract
    Download PDF (763K)
  • [title in Japanese]
    1978 Volume 32 Issue 7 Pages Preface1-Preface7
    Published: July 01, 1978
    Released on J-STAGE: November 10, 2009
    DOIhttps://doi.org/10.2524/jtappij.32.7_Preface1
    JOURNAL FREE ACCESS
    Download PDF (1286K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top