JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 35, Issue 4
Displaying 1-7 of 7 articles from this issue
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  • XIX. EUCEPA 13.-17. Oktober 1980 MÜNCHEN
    Hiroshi Hara
    1981 Volume 35 Issue 4 Pages 303-314
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.303
    JOURNAL FREE ACCESS
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  • Summarization of Responses to Questionnaire Sent to Member Companies concerning the Performance and Functions of Various Types of Dust Removing Device for Lime Kilns
    [in Japanese], [in Japanese]
    1981 Volume 35 Issue 4 Pages 315-343
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.315
    JOURNAL FREE ACCESS
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    The Environmental Improvement Committee of J. TAPPI sent a questionaire to those member companies which operate lime kilns concerning their dust removing devices.
    The questionaire includes;
    1. the types of device they use;
    2. actusl performance of their devices;
    3. the function and maneuverability of their devices; and
    4. how each mill is going to respond if the national regulation standard on soot and dust emission should be further intensified.
    Fifty-six (56) percent of the kilns surveyed are subject to the intensified regulatory standards imposed by the local communities, and the pulp mills employ the existent dust removing devices to meet such standards.
    Various types of dust removing device have their own merits and demerits; each mill appears to be making the best use of the existing device.
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  • Pulp and Paper Mills in Japan (31)
    Shiraoi Mill, Daishowa Paper Mfg. Co., Ltd.
    Daishowa Paper Mgf. Co. Ltd.
    1981 Volume 35 Issue 4 Pages 344-356
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.344
    JOURNAL FREE ACCESS
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    Daishowa Paper Manufacturing Co., Ltd. owns five mills, namely, Suzukawa, Yoshinaga, Imaizumi, Fuji, in Shizuoka prefecture and Shiraoi in Hokkaido.
    Shiraoi mill, located at Shiraoi-cho in South Hokkaido, has started its operation since 1960, now it is the largest and newest mill in our company.
    The mill is about 40 kliometers far to the north east of Muroran Port, from which imported wood chips (Douglas fir, Eucalyptus) and 70% of its products are transported.
    Paper & paperboard mill has 6 paper machines (daily capacity 1, 230 tons), 3 paperboard machines (daily capacity 320 tons), 2 off coaters (daily capacity 16 tons) and its products are newsprint, printing and writing paper, diazo sensitive paperstock, business form paper, coated paper, linerboard, coated white board and others.
    Pulp mill has 2 KP continuous digesters, 5 KP batch digesters, 3 BKP plants, 3 grinders, RGP plant, A-CGP plant, DIP plant and 2 pulpers for old corrugated containers pulping. The mill area is about 1, 340, 000m2 and the employees are about 1, 200.
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  • Process System Approaches for Resources Recycling in Pulp and Paper Industries
    1 st Report : Dynamic Simulation of WastePaper Recycling System
    Fusao Yoshida, Hiroshi Ohno, Atsushi Kajihara, Masayoshi Ishizuka, Ior ...
    1981 Volume 35 Issue 4 Pages 357-367
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.357
    JOURNAL FREE ACCESS
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    In recent years, the recycle utilization of resources has been of great importance as an effective measure for the solution of energy, resources and environmental pollution problems. Within this context, the recovery and utilization of waste paper have tended to increase in many countries.
    The aim of this paper is to make clear the prospects and policies for waste paper recycling and utilization in Japan. For this purpose, a dynamic model of the national level is first developed. In this model, all the processes relevant to the production, distribution and consumption of paper and board, and the generation, recovery and disposal of waste paper are decomposed to four subsystems such as manufacturer, wholesaler, consumer and recovery sectors.
    The material flows in the whole system are characterized by the state variables which express the inlet and outlet flow rates of paper and waste paper to and from these subsystems, and the state variables which express the inventories of paper and waste paper at each subsystem. By adding many controlling and influencing factors to the basic material flow model as information flows, the whole dynamic model structure is developed.
    The parameters included in the model are estimated from the real data, and the confidence of the model is confirmed by comparing the calculated values from the model with the real data for 10 years. Then, the model is utilized for estimating the change of state variables whose real data are not available.
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  • Kraft Cooking of Gamma Irradiated Wood (Part 2)
    Behaviors of Lignin and Carbohydrates
    Masamitsu Inaba, Gyosuke Meshitsuka, Atsushi Ishizu, Junzo Nakano
    1981 Volume 35 Issue 4 Pages 368-374
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.368
    JOURNAL FREE ACCESS
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    Pre-irradiation of wood in alkaline aqueous ethanol increases kraft pulp yield by up to 1.2 %, as already reported. In order to clarify the mechanism of the pulp yield gain, the behaviors of lignin and carbohydrates during pre-irradiation and cooking were investigated.
    The results are summarized as follows :
    1) γ-Irradiation of guaiacylethane in alkaline agueous ethanol produced 5- (1-hydroxyethyl) -guaicylethane, which is formed by radical coupling between α-hydroxyethyl radical from ethanol and guaiacylethane radical having an unpaired electron at C-5. 5, 5'-Dehydrodiguaiacylethane, which may be a predominant product produced by γ-irradiation in the absence of ethanol, was also detected.
    2) The yield of vanillin obtained by nitrobenzene oxidation of MWL decreased with an increase of γ-ray dosage. The presence of ethanol during γ-irradiation lessened the extent of this decrease and also the degradation of cellobiose.
    3) Gel filtration of the products obtained by γ-irradiation of MWL and cellobiose in the presence of 14C-ethanol showed the possible combination between ethanol and MWL or cellobiose.
    4) Molecular weight distributions of kraft lignin obtained from pre-irradiated beech chips were compared with those obtained from unirradiated chips. This result shows that γ-irradiation in the presence of ethanol decreases the ability of lignin to condense during kraft cooking.
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  • [title in Japanese]
    Jeannette C. Adkins, [in Japanese]
    1981 Volume 35 Issue 4 Pages 375-378
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.375
    JOURNAL FREE ACCESS
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    [in Japanese]
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  • [title in Japanese]
    1981 Volume 35 Issue 4 Pages 388
    Published: April 01, 1981
    Released on J-STAGE: November 13, 2009
    DOIhttps://doi.org/10.2524/jtappij.35.388
    JOURNAL FREE ACCESS
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