JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 40, Issue 10
Displaying 1-8 of 8 articles from this issue
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  • The Recent Technologycal Trends of Thermal Recording Papers
    Fumio Fujimura, Toshimi Satake
    1986 Volume 40 Issue 10 Pages 899-912
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.899
    JOURNAL FREE ACCESS
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  • Recent Technology Trend on Steam Turbine Generator for Pulp and Paper Industry
    Yasuhiro Inomata, Noboru Higurashi, Susumu Ozawa
    1986 Volume 40 Issue 10 Pages 913-935
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.913
    JOURNAL FREE ACCESS
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  • Introducing “Sun-Liftor” Vertical Belt Conveyor
    Norio Ishijima
    1986 Volume 40 Issue 10 Pages 936-939
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.936
    JOURNAL FREE ACCESS
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    Today, vertical transportation for bulk handling is mainly of chain or belt type bucket elevator. The equipment, however, has problems particularly in maintenance and causes a bottleneck of the system. Taking this situation into account, we have developed a vertical belt conveyor (Sun-Liftor).
    The typical features are as follows.
    ·A horizontal-vertical-horizontal line can be designed by one conveyor.
    ·Maintenance is easy without and/or chain which are of wear and tear.
    ·Sticky materials can be handled.
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  • Application Research of Oil Palm (Elaies guineensis Jacq.) Wastes to Raw Materials for Pulp and Paper Industry and its Background in Malaysia
    Yoshinari Kobayashi
    1986 Volume 40 Issue 10 Pages 940-948
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.940
    JOURNAL FREE ACCESS
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    Malaysia enjoys an international reputation of rapid expansion with its oil palm (Elaies guineensis Jacq.) industry, reaching 1.36 million hectare of oil palm planted area in 1984 and is now attaching great importance to R & D on economical utilization of oil palm wastes.
    It is because palm oil occupies only about 17 wt% of overall biomass produced by the plant. The wastes consist of palm trunks, fronds, empty fruit bunches, press fruit fibers, shells and palni oil mill, effluent. Among them the first three by-products are considered to be the most promising starting materials for pulp and paper industry because of their easy collection, nonseasonal availability and sources for comparatively good fibers. The successful history and oil palm industry in Malaysia and the botany of the palm as well as the, research activity of Palm Oil Research Institute of Malaysia were also reviewed.
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  • Application of Image Processing Technique for Analysis on Sheet Structure of Paper II
    Evaluation of The Formation of Paper
    Takashi Yuhara, Makio Hasuike, Koji Murakami
    1986 Volume 40 Issue 10 Pages 949-958
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.949
    JOURNAL FREE ACCESS
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    The mass co-occurrence matrix (MCM) technique was applied in order to describe the characteristics of formation of paper. The matrix, which represents the joint probability density distribution of mass density (i. e. local basis weight) of two neighboring points in the sheet, was computed from the digital image of 2-dimensional mass distribution. In this paper, the following types of parameters, which are extracted from MCM and describe the characteristics of formation, were investigated using handsheets (settling time before drainage: 10-100 sec.) and commercial papers.
    (1) Textural parameters, which express characteristics of the joint probablity density distribution, were extracted from MCM. Parameters fa, fc and fecould express the coarseness and contrast of texture, the intensity of large flocs and the intensity of small flocs, respectively.
    (2) Mean floc size was estimated from MCM. The value of mean floc size in handsheets increased with settling time.
    (3) A new parameter for the direct comparison of the MCM from each of two sheets was derived using the corresponding elements in the two matrices. The parameter is thought to be more useful than the above parameters for expressing the differences in mass distribution between two sheets.
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  • Thermal Decomposition of Cigarette Paper. VI
    Low Boiling Composition in Pyrolysis Products of Cigarette Paper Composed of Flax and Wood Pulps on Addition of Burning Chemicals
    Akira Yamazaki, Kazuo Maeda
    1986 Volume 40 Issue 10 Pages 959-964
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.959
    JOURNAL FREE ACCESS
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    Low boiling compounds produced by pyrolysis of cigarette paper composed of flax pulp and wood pulp (mix ratio 9/1) in helium atmosphere at 650°C were investigated by pyrolysis gas chromatographic analysis. Various organic acid salts and phosphates were added to the cigarette paper as burning chemicals (1, 3 and 5%).
    The following results were obtained. Low boiling compounds in pyrolysis products of cigarette paper with burning chemicals were almost same as those of cigarette paper without additives. A distinct difference in yields of low boiling products was observed at3% addition of burning chemicals. The yields of four degradation compounds (propyne+allene. No.8, acetoaldehyde. No.12 and furan. No.20) decreased.
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  • Study on Recovery of Recycled Bleachery Effluent. 1
    Brown Stock Washing with Recycled Bleachery Effluent
    Nobutake Sasaki, Kazuyoshi Wakata, Katsuhiko Sakata, Takeo Nagasawa
    1986 Volume 40 Issue 10 Pages 965-973
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.965
    JOURNAL FREE ACCESS
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    Some effects accompanied with recovery and reuse of bleachery effluent for brown stock washing were investigated in laboratory.
    Model flow consisted of brown stock washing and three stage bleaching of CE1H. Washing with chlorination stage filtrate increased 43%more available chlorine in bleaching process than fresh water washing by precipitation of organics from black liquor. However, alkali extraction stage filtrate required only 10% more available chlorine.
    Kappa number and brightness of pulp were changed by filtrate recycling in chlorination and alkali extraction stages. But little change was observed on pulp brightness and total chemical consumption after three stage bleach. Filtrate recycling in hypochlorite stage had also little effect on chemical consumption.
    Chemical consumption in bleaching process was increased with carry over of black liquor and other filtrates. Black liquor had serious effect on chlorine consumption.
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  • [title in Japanese]
    1986 Volume 40 Issue 10 Pages 975
    Published: October 01, 1986
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.40.975
    JOURNAL FREE ACCESS
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