JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
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Volume 48, Issue 1
Displaying 1-41 of 41 articles from this issue
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  • New Year's Speech
    Yoshihiro Onda
    1994 Volume 48 Issue 1 Pages 1-4
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.1
    JOURNAL FREE ACCESS
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  • General Review of JAPAN TAPPI 1993 Annual Meeting at Sendai
    Planning Subcommittee JAPAN TAPPI
    1994 Volume 48 Issue 1 Pages 5-9
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.5
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  • Keynote Address
    Yoshihira Onda
    1994 Volume 48 Issue 1 Pages 10-17
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.10
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  • Lecture by the Winner of 1992 JAPAN TAPPI Prize
    Sanro Tachibana, Fumihiko Onabe
    1994 Volume 48 Issue 1 Pages 20-21
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.20
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    1994 Volume 48 Issue 1 Pages 22-32
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.22
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  • [title in Japanese]
    [in Japanese]
    1994 Volume 48 Issue 1 Pages 33-35
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.33
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  • Operating Experience of No.4 Paper Machine
    Yasushi Kawaguchi
    1994 Volume 48 Issue 1 Pages 36-41
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.36
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    No.4 Newsprint paper machine started up in May 1991 at Iwanuma Mill. To be a model of newsprint machine, this machine was designed with new concept and latest technology.
    We report the operating -experience over two years.
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  • Development of Concept N-MHTM Headbox
    Tetsuo Makino, Noriaki Takeguchi, Akira Eguchi, Toshimi Tajima
    1994 Volume 48 Issue 1 Pages 42-51
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.42
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    Jointly developed by Mitsubishi Heavy Industries and Beloit Corporation, the Concept IV-MHTM headbox is a major breakthrough in headbox technology. The Concept IV-MH was developed with the objective of meeting not only the traditional headbox performance requirements, but also anticipating and meeting the stringent quality demands of the future.
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  • Mill-Wide Computer System of Ishinomaki Mill
    Yoshihiko Shimura
    1994 Volume 48 Issue 1 Pages 52-61
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.52
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    In Japan, several pulp and paper mills have been constructed each mill-wide computer system (total production management system) for recent ten years. But all fibrous materials contain moisture, and it is a delicate problem that the moisture content of paper is changed easily by circumstances. Furthemore, it is difficult to measure accurately moisture content of paper by on-line sensors. This is the reason systemizing of quantitative control is not easy in a pulp and paper industry to compare with the steel industry which has the similar process.
    In our system, the production volume of paper is showed in area. The wed length equivalent to the area of paper on each process. Talking about a paper machine, the roll length on the reel part is measured automatically and strictly by counting pulse of the reel drum rotation. Using these reliable data from process and some data input by field operators manually, we can get the operating information and the loss quantity yielded in each process from papermaking to finishing.
    The hardware with file servers and inteligent terminals are in a horizontal and distributed structure on a LAN. The phase II has been operated since this spring.
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  • Development of IHI-VOITH New Former
    Duoformer CFD
    Osamu Fujimura
    1994 Volume 48 Issue 1 Pages 62-68
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.62
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    IHI-Voith have developed a newly gap former, Duoformer CFD. This former utilizes a suction forming roll to initiate sheet formation and a blade unit to finalize it. The blade unit has been derived from Duoformer D, a hybrid former that has been adopted for many installations with great success.
    Therefore the Duoformer CFD offers a wide range of applications with respect to grade, basis weight and speed. It incorporates the positive attributes of roll and blade formers and consequently combines the requirements for optimum paper properties and ease of operation.
    Cleanliness has a major bearing on performance. Special attention has therefore been paid to this aspect. A newly developed wire cleaning unit, the Jet Cleaner, will contribute to achieving this goal. Its clean design ensures high runability and high availability.
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  • Lost Profit Recovery at Paper Board Mill
    The Relating Technology & Facilities in The Stock Preparation Room
    Takeshi Kanazawa
    1994 Volume 48 Issue 1 Pages 69-77
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.69
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    Stock preparation technologies have changed significantly since the first and the second oil shocks to improve energy saving. In addition, by the movement in recent years to save natural resoures and to protect from environmental pollution, many new technologies have been developed not only in deinking for recycled paper, but also in stock preparation for paper board.
    On the other hand, in the paper manufacturing which is one of the most typical industries in continuous operation, a single error in the technologies can easily lead to a big profit loss, and reflects highly on the cost reduction. Reduction of cost by proceeding what we call “Lost Profit Recovery” is important as well as a long term project for a new technology development.
    In this paper, an estimation of the lost profit in the stock preparation field for paper board manufacturing and the desirable countermeasures for the lost profit recovery are reported.
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  • Operating Experience of Cycle Hit System
    Hiroyuki Mori, Yasuyuki Fujimoto, Hiromi Kifune, Kotoyasu Takenaka, Sh ...
    1994 Volume 48 Issue 1 Pages 78-82
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.78
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    Our Cycle Hit System of Iwakuni Mill started up from Febrary 1993 and Coated paper product waste liquor (Color waste liquor) has been treated succesfully with it.
    In this system, primary plus secondary sludges are directed to a slugde conditioning tank, where it is dosed with an inorganic coagulant and mixed to neutralize the surface charge of the sludge particles.
    This conditioned sludge is then sent to a pelletizing/thickening tank, where an anionic and an amphoteric polymers are added to pelletize the sludge. Using the same tank, water can be removed with a special built-in device, resuluting in a sludge with an increased concentration of solids.
    This report described the summary of operation.
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  • Fuel Conversion at a Mill Adjacent to Urban Centers
    Yukiharu Oizumi
    1994 Volume 48 Issue 1 Pages 83-87
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.83
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    Kanzaki Mill, New Oji Paper Co., Ltd. is located in Amagasaki city which is in the south east of Hyogo prefecture. Amagasaki is adjacent to Osaka city bordered by the Kanzaki river, and is also surrounded by Mt. Ikoma to the east and Mt. Rokko on the north. This town still has a traditional good atomosphere brought up by warm heart and cooperative residents.
    Here, in Amagasaki, as same as in other industrial areas in Japan, we have been forced to face some changes of environment such as construction of high storied apartments and a more severe control of pollution by local authorities as the result of environmental pollution suits.
    Under these situations, we must positively make efforts to solve the problems in order to meet more severe enviromental standards on air and water pollution, legislated by Amagasaki city and Hyogo prefecture.
    Then we commenced studying it, focusing on choice of energy, which would result in a progress of rationalization of production and would meet our future conception of the mill adjacent to urban centers.
    We have come to the conclusion that No.4 boiler should be converted from heavy oil type to natural gas type. New boiler has come on stream in July 1991. Therefore, we wish to report our experience of No.4 boiler operation for two years.
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  • Process and Condition Monitoring System
    MXOpen Intelligent Monitoring System
    Noriyuki Watanabe
    1994 Volume 48 Issue 1 Pages 88-96
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.88
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    MXOpen Integrated Monitoring System (IMS) is a distributed process and condition monitoring system used to improve paper machine runnability and sheet-to-sheet paper uniformity.
    This article shows the outline of IMS with application examples.
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  • Operating Experience of Modified Continuous Cooking
    Hajime Yamanaka
    1994 Volume 48 Issue 1 Pages 97-103
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.97
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    Kasugai Mill of New Oji Paper Co., Ltd. installed a softwood digester equipped for Modified ContinuousCooking (MCC) in February, 1989. MCC is relatively new technology.
    From mill trials, improvement of viscosity and strength of pulp was confirmed by comparing MCC with conventional cooking. Running an MCC operation, kappa number at the blowline has been reduced from 30 to 24, and from 15 to 11 after oxygen delignification. This contributes to the reduction of both chemical costs for bleaching and chlorinated organic compounds (AOX) in the effluent.
    Initial problem of MCC operation was the fluctuation of kappa numbers from the instability of temperature at a lower cooking zone which has upflow of digesting liquor. Kappa number has been stabilized after increasing circulation flows drastically in this area.
    The yield of unbleached pulp is decreased with MCC lower kappa number, but it is compensated with oxygen delignification which removes lignin more selectivety. The yield after bleaching is comparable with conventional cooking.
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  • Operating Experience of Compaction Buffie Filter
    Ichiro Umeda
    1994 Volume 48 Issue 1 Pages 104-108
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.104
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    C. B. filter was installed at Hachinohe Mill and started its operation in September 1988.
    This filter is the first one to be introduced in Japan.
    In spite of a several initial troubles, it has been operated smoothly nowadays with satisfactory performance.
    This paper reports the details of its introduction and its operation experience.
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  • Operating Experience of Elementary Chlorine Free Pulping
    Masashi Horino
    1994 Volume 48 Issue 1 Pages 109-114
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.109
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    On BKP plants of Honshu Kushiro Mill, ECF bleaching has been applied to produce materials for Non-woven which has been required to reduce the Dioxin. The sequence of ECF bleaching is five stages (D-Eop-D-H-D) with existing plants, which is partly altered from the conventional sequence (D/C-E0-D-H-D).
    The conventional bleaching pulp has been produced as sheet pulp, on the other hand ECF bleaching pulp is as role pulp.
    This is introduced the experience of ECF pulping operation which has been running at intervals since November, 1992.
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  • The Evolving Technology on Deinking
    An Intoroduction of ONP High-Brightness Deinking System
    Naoyuki Iwashige
    1994 Volume 48 Issue 1 Pages 115-119
    Published: January 01, 1994
    Released on J-STAGE: November 29, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.115
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    In production of ONP high brightness deinked pulp with Hunter brightness over 70%, the deinking process should be simplified as much as possible to reduce the power consumption and the equipment cost.
    The keypoint to design the ONP high brightness DIP plant, that was derived from DIP trials in our test plant, is;
    -to apply the pre-washing or pre-flotation system in the gray stock coarse screening stage
    -to minimize the fine fiber loss in the washing stage
    -to remove the hydrogen peroxide remained in the stock as much as possible before reductive bleaching
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  • Performances of Deinking Agent from Properties of Surface Chemistry
    Atsuo Toutsuka
    1994 Volume 48 Issue 1 Pages 120-124
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.120
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    Interfacical properties required for deinking agent were investigated as perceiving agglomeration and capturing of ink particles, followed by penetration of the area where ink is in contact with the fiber and removing ink from the fiber respectively. Interfacical phenomena such as contact angle, zeta-potential and retreat contact angle were measured. Excellent deinking is achieved under controlled properties of the surface chemistry. Moreover, the influence of deinking agents on optical factors: brightness and color shade, physical properties of DIP and effects to sizing and paper strength for end products at papermaking were studied.
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  • Low Kappa Pulping and TCF Bleaching
    Kohei Kurita
    1994 Volume 48 Issue 1 Pages 125-132
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.125
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    It is long time since the problem of dioxin was brought up, and restrictions of BOD, COD and also severe requirements about AOX reduction for bleach effluent was proposed in different countries.
    To cope with the requirements, KAMYR developed MCC and ITC which together with MCO2can produce low kappa pulp with retaining pulp strength at inlet of the bleach plant. This also opened up the possibility of ECF, TCF bleaching which are market requirements in many countries.
    The paper introduce ITC, including a rebuilding of an existing digester to ITC with its operational data and the following ECF/TCF bleaching.
    The principal flowsheet for TCF pulp which targets the closed mill is also outlined.
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  • MC Ozone Bleaching
    Kaj Henricson, Toru Kobayashi
    1994 Volume 48 Issue 1 Pages 133-138
    Published: January 01, 1994
    Released on J-STAGE: November 29, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.133
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    Ozone delignification is recognized as one of the alternative techniques that has the potential to replace methods using chlorine based chemicals in the bleaching of chemical pulps. Ahlstrom Kamyr has been working on development of ozone bleaching processes and equipment and confirmed that the ozone is an attractive bleaching chemical.
    This report will introduce Ahlstrom's equipment for a ozone bleaching system including a newly developed gas mixer, a short bleaching sequence for producing TCF pulp using ozone but without chelating stage and the effect of filtrate recirculation in the process.
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  • Ozone Generation Technology for Industrial Applications-Today and Tomorrow
    N. J. Wiegart, H. V. Lang, [in Japanese]
    1994 Volume 48 Issue 1 Pages 139-143
    Published: January 01, 1994
    Released on J-STAGE: November 29, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.139
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    Recent developments in ozone generation technology are highlighted and commented with respect to their bearing on industrial applications such as ozone pulp bleaching. In particular, OZONIA's “Advanced Technology” Ozone Generators will be presented with their main features and performance characteristics. Their exceptionally low energy consumption at common ozone concentrations and their capability of producing very high ozone concentrations provide a solid basis for effective and economic industrial processes.
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  • A New Filter System for White and Green Liquor
    Makoto Shimokawa
    1994 Volume 48 Issue 1 Pages 144-147
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.144
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    A new filter system for filtering of white and green liquor in the chemical recovery system of a kraft pulp mill has been developed.
    The system has the advantage of being a continuous process with few mechanical moving parts. The chemical loss with the filtered mud is low, and the closed system prevents oxidation of the liquor.
    Based on the pilot plant trail we have done so far, CAUSTECTM cassete filter system has demonstrated a remarkable good separation effect of process foreign elements.
    Maintenance costs are low and downtime for changing filter elements is only a few hours once or twice a year, providing excellent availability.
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  • Optimized Cleaning Systems for Recovery Boiler
    Hans Schwade, Tetsuro Kawai
    1994 Volume 48 Issue 1 Pages 148-154
    Published: January 01, 1994
    Released on J-STAGE: November 29, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.148
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    Although for process optimization and to keep a kraft recovery boiler on line it is crucial to avoid pluggage of the air and gas passages, the technology of recovery boiler cleaning had not changed for quite some time. Sootblowers are not efficient and very costly to operate. Most air ports are still being cleaned through manual rodding with all disadvantages for the recovery process.
    Recently, the methods of recovery boiler cleaning have been improved quite substantially.
    New cleaning concepts have been developed and tested to help improving the overall process efficiency of the recovery boiler. The result of this development is an optimized cleaning system using multilevel automatic port cleaners and dampers for improving control over combustion in the lower furnace and an advanced sootblower system for keeping the upper furnace cleaner.
    Several new recovery boilers have been equipped with this technology.
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  • Development of a new wastewater treatment tchnology
    Improvement of membrane technology
    Akio Tamaki
    1994 Volume 48 Issue 1 Pages 155-160
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.155
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    In recent years, the contaminant load in the bleaching process is reduced by installation of oxygen delignification facilities and by the improvement of bleaching sequence. The components in contaminant change, and the molecular weight of the components is becoming lower.
    Changes of effluent properties from bleaching process will degrade COD recovery performance in UF membrane facility. In order to improve this COD recovery performance, the experiment of membrane for E/O stage effluent is carried out. In UF membrane process, most part of higher molecular weight components (more than several ten thousand) and about 50% of ten thousand molecular weight components are removed, resulting in 50 to 60% of COD recovery. As for color and AOX, the recovery capacity was more than that for COD.
    The processing system, in which UF membrane is combined with RO membrane, is studied to improve COD recovery capability. In this system, permeate from UF membrane is processed by RO membrane and it is found that COD recovery capability improved from 53.5% to 67.0%.
    It is also confirmed that the recovery capability for both color and AOX can be improved.
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  • Anaerobic Treatment for Pulp & Paper Mill Wastewater
    Results of “Aqua Renaissance '90”
    Kazuo Okamura, Tsutomu Ogoshi, Tetsuo Fujioka, Gennosuke Inoue
    1994 Volume 48 Issue 1 Pages 161-168
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.161
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    A study on anaerobic bioreactor using Kraft pulp mill wastewater was performed with UF membrane separation process. The system consisted of pretreatment equipment for oil separation, a stripping system for sulfur compounds, an anaerobic bioreactor for methane fermenation, membrane module equipment for bacterial concentration, and a gas treatment system. The bioreactor had a fixed-bed with an effective volume of 5 m3 packed with pumice stone.
    In continuous run with the membrane module system, the HRT was 12 hours, maximum BOD loading rate was 35 kg-BOD/m3/day, and maximum BOD removal rate was 93%. Highly efficient continuoud operation was attained with concentration of useful bacteria by the membrane.
    And, we have also made trial calculation of costs for methane fermentation.
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  • OPTIREELTM
    The new reeling concept
    Yasuhiro Hatano
    1994 Volume 48 Issue 1 Pages 169-173
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.169
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    A significant portion of PM line production is wasted due to poor reel starts. That's why we developed the new OPTIREEL. This concept optimizes the entire reeling process and minimizes bottom broke.
    The OPTIREEL is available as a continuous reel both for paper machine and coater application and for the rereeler. Existing conventional reels and rereelers can be replaced or modernized by OPTIREEL.
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  • Development the new coating materials having the characteristic of durability and cleanness for canvas rolls
    Hajime Miwa
    1994 Volume 48 Issue 1 Pages 174-179
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.174
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  • Auto Skid Packing by Polyethylene Shrink Film
    Yoshihiro Nakano
    1994 Volume 48 Issue 1 Pages 180-184
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.180
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    This machine with a full automatic size change mechanism-the first in this kind of industry-utilizes easy-to-recycle polyethylene film. Also, great wrapping strength obtainable with this machine eliminates the need to use auxiliary packing materials such as wooden top boards and steel-or PP-bands, and so substantial cost reduction can be attained.
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  • Latest Yankee Hoods
    Tasuku Hattori
    1994 Volume 48 Issue 1 Pages 185-188
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.185
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    This thesis will take up a Yankee hood for drying tissue or toilet paper which is widely used at home and describe its outline in view of increased dehydration capacity, improved moisture profile uniformity, and decreased energy comsumption.
    Characteristics of Latest Yankee Hoods
    Dehydration Capacity of Yankee Hood
    Recently the Yankee hood has been required to have a share of 50 to 60% of the total dehydration capacity of the entire system. This has increased demand for high temperature, high velocity hoods to enhance the dehydration capacity. Specifically, the hot air temperature has increased from 300°C to 450°C, and the air velocity, from 90m/sec. to 120m/sec.
    Moisture Profile Correction in Yankee Hood
    Hot air nozzles are divided into seven to twelve groups across the paper width. The velocityof hot air from each group is adjusted to correct the moisture profile.
    Energy Saving at Yankee Hood
    Improvement in dehydration efficiency ·The gap between the Yankee dryer surface and the hot air nozzles should be minimized.·The hot air temperature should be kept at the necessary minimum.
    Improvement in thermal efficiency·The volume of air for exhausting moisture should be kept at minimum. The dew point of the exhaust is 79-82°C.·The supply air of the volume corresponding to the exhaust air volume should be preheated by waste heat recovery.·Pressure balance inside the hood should be controlled.
    Improvement in motor transmission efficiency
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  • The Neutral Sizing Agent
    Newly Developed Sizing Agent and the Sizing Mechanism
    Kenji Yokotani
    1994 Volume 48 Issue 1 Pages 189-192
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.189
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    Two types of neutral sizing agents based on different concepts were studied to result in a new developmental product KS-951 from a new material.
    As a model of reactive sizing agent the sizing efficiency of various phenol stearates in neutral paper making were evaluated and was found to be closely related to the stability of phenol stearate.
    As a “non-reactive” sizing agent alpha-hydroxy-carboxylic acids (α-hydroxystearic acid) had remarkable sizing efficiency when used along with alum. This finding has led to the development of a new neutral sizing agent KS-951 effective in a wide pH range of paper making which, unlike AKD, dose not require curing for the development of sizing effect.
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  • New Low-TOCL Polyaminoamide Epichlorohydrin Wet Strength Resin
    Yoshiki Mabuchi
    1994 Volume 48 Issue 1 Pages 193-196
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.193
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    Recently environmental protection is one of the most important issues of all industries. The matter of AOX in pulp and paper industry cannnot be free from this situation. Paper manufacturers are seeking the chemicals which are compatible with the environment.
    Henkel Corporation reported that typical commercially available polyaminoamide-epichlorohydrin (PAE) resins contained about 12% of low molecular weight organic chloride contaminants (1). The performance of the first generation products of low TOCL PAE resins were slightly inferior to the typical PAE resins. Henkel Corporation developed new PAE resin which has low level of TOCL content and even better performance. This product, Fibrabon 1, 500 HP has higher content of quaternary ammonium salt groups which affect the performance of PAE resin.
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  • Structural analysis of the coated layer with amphoteric latex binder
    Eisuke Shiiyama, Yukie Misu, Kohji Takano, Akira Nakagami
    1994 Volume 48 Issue 1 Pages 197-202
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.197
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    The structures of the coated layers containing amphoteric latices as binders, with different glass-transition temperatures (Tg), have been studied with respect to the porosity, the of latex particles and the degree of orientation of clay particles in the coated layers.
    In contrast with the conventional anionic latices, amphoteric latices are found to form more porous coated layer, disturb the orientation of clay particles and show restricted migrations in the coated layers, through the electrostatic interaction with clay particles when the coating colors are prepared below pH 10.
    These behaviors are also revealed to depend on the Tg of latices and the drying conditions of coated layers
    The structural features of coated layers are discussed in connection with the properties of coated paper, e. g. gloss.
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  • Small Particle Latexes and Formulations for High Speed Coating
    Hisashi Matsui, Nonfumi Sumimoto, Masahiro Miyamoto, Takeshi Watanabe, ...
    1994 Volume 48 Issue 1 Pages 203-208
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.203
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    Small particle size of latex for a coating color formulation was effective to reduce the color viscosity at high shear rate, so that their coating color was suitable for high speed coating.
    Small particle size latex exhibited good picking strength and ink holdout. But it gave poor sheet gloss and ink receptivity.
    It was possible to combine advantageous coating materials. For example, it was improved and valanced that a small particle size of clay was used for a coating formulation in addition to small particle size of latex.
    It could be suitable for high speed coating over 1, 500 m/min. and gave good coated paper properties.
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  • Introduction of Realtime Measurement & Evaluation System TEXELA
    Takashi Ochi
    1994 Volume 48 Issue 1 Pages 209-214
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.209
    JOURNAL FREE ACCESS
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    TEXELA is the realtime measuring system for vibration and distribution analysis. TEXELA utilizes cards which conform to the VME and VXI bus standards. TEXELA is connected with UNIX workstation and has high-speed measurement and high-level analysis functions. This paper explains functions, software and structure of TEXELA. Furthermore, it covers applications of paper production supporting system, facility diagnosis and injection molding system.
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  • Introduction of New SST-3000 and Development of SST Uses
    Tomoyoshi Nomura
    1994 Volume 48 Issue 1 Pages 215-219
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.215
    JOURNAL FREE ACCESS
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    Series of Sonic Sheet Tester models are now widely used in paper industry for analyzing fiber orientation in order to control paper quality.
    SST-3000 has been developed as the latest model to realize improvement of runnability and labor saving with its automatic measuring function for strip sample in addition to the sheet measuring facilities already provided with the former models.
    It is much more useful for measuring C/D orientation profile.
    We hereby introduce outline of SST-3000 and applicable use for its functions.
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  • Development and Characteristic of Novel Plastic Pigments
    Hideki Toda, Daiharu Maeda, Yasuo Kataoka
    1994 Volume 48 Issue 1 Pages 220-226
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.220
    JOURNAL FREE ACCESS
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    We have developed various novel plastic pigments. They are especially for coated paper and paper board. The coated paper and paper board containing plastic pigment instead of inorganic pigment have high gloss, brightness and opacity.
    In this report, characteristic of binder-type and hollow sphere plastic pigments which have lately been attracted considerable attention will be discussed.
    Binder-pigment type latex has dual functions of a pigment and a binder. Accordingly, it is possible to reduce the amount of the conventional binder latex. It is able to used for high grade coated paper and paper board. Nobel hollow sphere plastic pigment which is prepared by alkali/acid treatments of carboxylated polymer particles has high opacity and sheet gloss of coatings.
    It's smaller specific gravity leads to lighter weight coated paper.
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  • Application of Ceramics Sliter Knife on Paper Industry
    Taiji Yamamoto, Kenichi Mori, Yoshio Taniguchi, Ryoich Shikata
    1994 Volume 48 Issue 1 Pages 227-230
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.227
    JOURNAL FREE ACCESS
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    We have exploited a zirconia/alumina composite ceramic with the highest strength of all ceramics. Due to its excellent hardness and toughness, it is becoming the focus of public attention as structural ceramic. Taking up the ceramic knife as one of its applications, the author will explain features of the ceramic slitter knife. When it was used as a lower blade for particularly paper making usage together with a conventional upper metal blade, the cut section can be finished precisely and neatly.
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  • Introduction of New Products for Stock Preparation Equipment
    Eiji Tsuruzono
    1994 Volume 48 Issue 1 Pages 231-235
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.231
    JOURNAL FREE ACCESS
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    Recently, many new products have been appeared in the field of waste paper treatment and deinking.
    Following three new products are introduced in this paper. S-screen having unique S-rotor is high consistency screen for various virgin and waste pulp screening.
    Bel-Wave basket is cost effective, rebuildable basket having unique corrugated sections and bolted construction in corse screening applications.
    Dynamic washer is a pressure driven process by which a finely perforated filter separates the ink and fillers from stock.
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  • [title in Japanese]
    [in Japanese]
    1994 Volume 48 Issue 1 Pages 239
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.239
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1994 Volume 48 Issue 1 Pages 240-246
    Published: January 01, 1994
    Released on J-STAGE: October 27, 2010
    DOIhttps://doi.org/10.2524/jtappij.48.240
    JOURNAL FREE ACCESS
    Download PDF (1100K)
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