JAPAN TAPPI JOURNAL
Online ISSN : 1881-1000
Print ISSN : 0022-815X
ISSN-L : 0022-815X
Search
Advanced search
OR
Browse
Search
Volume 66, Issue 10
Displaying 1-20 of 20 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
Pulp
  • Report of 18th Pulping Seminar
    Pulp Technical Committee
    2012 Volume 66 Issue 10 Pages 1051-1052
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1051
    JOURNAL FREE ACCESS
    Download PDF (269K)
  • Chemistry of Delignification in Pulping and Bleaching
    Tomoya Yokoyama
    2012 Volume 66 Issue 10 Pages 1053-1058
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1053
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Most of the principal delignification reactions in pulping and bleaching are described in various books related to wood chemistry and published by Japan TAPPI. In this report, these reactions are primarily reviewed, and several valuable reactions are described. Then, the recent results about pulping and oxygen bleaching obtained in our laboratory are introduced.
    View full abstract
    Download PDF (318K)
  • Cooking Technologies of Digesters for Producing Kraft Pulp
    Yan Ju
    2012 Volume 66 Issue 10 Pages 1059-1063
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1059
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    With development of the theories for kraft pulping, a number of cooking technologies of digesters and cooking processes such as MCC, ITC, and BLI which based on the theory proposed in 1980s were developed. On the other hand, COMPACT COOKINGTM G1 and G2 cooking systems which based on the theory proposed in 1990s were also innovated. COMPACT COOKING™ G2 system can meet the requirement to, (i) build a new fiber line both for hard wood and for soft wood, (ii) increase the capacity for the existing cooking system, (iii) modify the existing cooking system for the purposes of increasing cooking yield, bleaching ability, and pulp quality as well as for the purposes of reducing energy consumption and environmental load.
    View full abstract
    Download PDF (479K)
  • ADVANCED TMP-Enhancing Fiber Development at Reduced Energy Consumption
    Peter Braeuer, Johann Grossalber, Marc Sabourin, Tamio Fukuzawa
    2012 Volume 66 Issue 10 Pages 1064-1074
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1064
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A method for producing well-bonded thermomechanical pulps, herein named ATMP, from several softwood species at significantly reduced energy consumption is presented using a combination of TMP sub-processes and targeted chemical treatments. The ATMP technology consists of unit operations formulated to better separate the defibration and fibrillation steps with the goal of improved pulp fiber bonding at the lowest possible energy consumption ; targeted chemical treatment is an important subcomponent for maximizing the efficiency of this process. The sub-process of chemical treatment is presented from a series of pilot studies evaluating ; i) sodium bisulfite treatment, ii) location of chemical application, iii) sodium bisulfite charge and iv) type of chemical agent applied. The impact of bisulfite pretreatment on alkaline peroxide bleaching is also presented. The results confirm that bisulfite is an effective chemical agent for enhancing the ATMP process, and its performance is optimized by both, the location of chemical treatment and charge on O. D. fiber.
    View full abstract
    Download PDF (572K)
  • Today’s Subjects of Domestic DIP Plant and Its Solutions
    Kazuo Aoshima, Kazumi Fujita
    2012 Volume 66 Issue 10 Pages 1075-1082
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1075
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    After the big earthquake, power shortage due to shut-down of the almost all of nuclear power plant is giving a serious damage to our pulp & paper industry. Again this summer, we have to survive in extreme environments. DIP is good for the ecology originally because using waste paper and not need much tree cutting. But now additionally it is required more direct contribution of reducing the electric power consumption as much as possible.
    So far, AIKAWA Iron Works has developed a lot of the most-advanced DIP facilities and lower power consumption systems under cooperation with users. For examples ; the combination system of HeliDisc high consistency pulper & Double Dumping Screen which has superior pulping action, coarse impurities removing and ink dispersion effects. Ultra low power consumption MaxFlow & GranFlow screens for coarse & fine stages. HyperCell which has all good points of past floatators. 4 shafts UV Breaker & ConiDisc hot dispersion system which required for high brightness.
    In this report, we would try to introduce additional equipment and systems as the countermeasures to this crisis. i.e. Continuance high consistency pulping system, Fractionating DIP system, applications of Flexible cascade cleaner system & HyperCell, Advanced MAXWave screen cylinder and Ultra low intensity post refining system.
    View full abstract
    Download PDF (774K)
  • Operating Experience of Co-Firing of Petroleum Coke System in Lime Kiln
    Satoshi Hasegawa
    2012 Volume 66 Issue 10 Pages 1083-1087
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1083
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Oji Paper Nichinan mill has two rotary lime kilns in recausticizing process of kraft pulp plant, No. 1l ime kiln (φ2.3m×50mL) and No. 2 lime kiln (φ2.1m×36.5mL). Since waste derived fuel boiler was installed in 2006, the lime kiln was the only process to use heavy oil in the mill. In order to reduce heavy oil consumption, we installed petroleum coke co-firing system on the lime kiln in 2008. Some troubles happened at the start-up, but now this system is running very well and has brought large economic effects.
    This paper shows the operating experience of co-firing of petroleum coke system in lime kiln.
    View full abstract
    Download PDF (582K)
  • Operating Experience of Hyper-Cell Floatator
    Tatsumi Hosaka
    2012 Volume 66 Issue 10 Pages 1088-1092
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1088
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In Japan, the utilization rate of recovered paper reached 63% in 2009. Except paper board, ONP is mainly used for recovered paper. Since news paper quality, such as ash content, has been changed, ash and microsticky removal is required, especially at the floatation process for paper recycle. In order to improve DIP quality and promote further use of DIP, Aikawa iron works and Nippon Paper Industries developed the state-of-the-art floatator “Hyper-Cell floatator” and installed in Hokkaido Mill-Yufutsu. This report introduces our operating experience of Hyper-Cell floatator.
    View full abstract
    Download PDF (551K)
  • The Measure of a Bad Smell Improvement of Kraft Pulping Process
    Hiroshi Fujita
    2012 Volume 66 Issue 10 Pages 1093-1097
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1093
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Since Niigata Mill, Hokuetsu Kishu Paper Co., Ltd is being located in the central part of Niigata, it is very sensitive to an environmental trouble. In response to past various environmental troubles, the environmental impact prevention regulation based on ISO 14001 was enacted in August, 2011. In this news, the bad smell sensor employment method of the circumstances where it resulted in environmental impact prevention regulation establishment, or the Niigata factory, the environmental trouble example in KP process, and a bad smell measure example are introduced.
    View full abstract
    Download PDF (705K)
  • The Bamboo Pulp Production by Batch Digester
    Yoshitaka Fuse
    2012 Volume 66 Issue 10 Pages 1098-1102
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1098
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Kagoshima Pref., where the Sendai Mill is located, has the largest bamboo forests area of 16,000ha in Japan, and typical species named Moso bamboo covers an area of 7,600ha.
    Since well controlled bamboo forests produce a good quality of bamboo shoot, bamboo older than five years need to be trimmed every year in order to maintain the forest quality. However most of the trimmed bamboo has been left in the forest usually, it has been an issue how to utilize such abandoned bamboo.
    Sendai mill has been utilizing such trimmed local bamboo since 1999 as raw material for paper production, in order to protect local forest environment and to contribute prevention of global warming. We upgraded the batch digester system pulp line for small lot production into ECF pulp production plant, and this upgraded line has started production in 2010 and the trimmed bamboo is utilized more effectively. We introduce our experiences on the bamboo pulp production.
    View full abstract
    Download PDF (539K)
  • Analysis and Countermeasures against Stickies Occurring at Deinked Pulp Process
    Hiroshi Ougiya
    2012 Volume 66 Issue 10 Pages 1103-1107
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1103
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In Hachinohe mill, deinked pulp (DIP) with high brightness is produced. The pulp is mainly made of sorted colored ledger. However, the procurement of sorted colored ledger has become difficult by the rising price of all over waste paper. Therefore, we are forced to use several types of waste paper such as waste magazine. With the increase of usage of waste magazine, quality trouble caused by stickies was increasing.
    To reduce the stickies, we analyzed the DIP process and characteristic of the stickies. The stickies become small through the process not only by shearing force but also by chemical function. Much stickies was removed by screening than by floatation, but we recognized that the floatator was able to remove problematic stickies. As a result, improvement of removal of the stickies by floatation induced achievement of decrease of the quality trouble.
    View full abstract
    Download PDF (457K)
  • Chemical Pulp Fiber Line Optimization
    Naoto Takigawa
    2012 Volume 66 Issue 10 Pages 1108-1114
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1108
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The purpose of this paper is to review the best available measuring equipment and controls for ECF and TCF bleach lines. The target for a complete chemical pulp bleaching line is to bring the Kappa number down to zero and to reach the final brightness target. However, to control a bleaching line, we have to look at each stage separately and decide what the objective is, how we will monitor the success of the stage, what we will control, and how.
    View full abstract
    Download PDF (1035K)
  • Applying a Real-Time Cost Management System to Pulping
    Yuichi Marumoto
    2012 Volume 66 Issue 10 Pages 1115-1119
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1115
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The pulp and paper industry has been facing adversities in securing cost-effective prospects domestically. This is due to the rise of raw material expenses caused by increased demands among Asia for the said industry, as well as to the decline of facility utilization ratio caused by decreased demands in the Japanese market. Therefore, the challenge today is to develop a system that enables continual cost reduction that substantializes profits while still meeting high quality expectations typical of the Japanese culture.
    This paper introduces a real-time cost management system that converts into “Yen” the actual amount of pulp, chemicals, steam, and electricity consumed in paper manufacture, with the intention of visualizing expenditure in real time. This system provides a means to achieve cost reduction as the manufacture operator can assess variations caused by material adjustments and grasp the cost of broken paper from running trial operations. The essence of this real-time cost management system lies in expressing every material as “cost” (a commonly recognized form of information among company, factory, and work sites) and publicizing it at the earliest timing possible.
    View full abstract
    Download PDF (674K)
  • Utilization of Lignin Obtained by Separation of Wood Components
    Yasumitsu Uraki
    2012 Volume 66 Issue 10 Pages 1120-1125
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1120
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    To establish chemical biorefinery for woody biomass, it is very important to convert lignin into value-added materials in addition to its use as an energy source. In this report, I would like to introduce its conversion to several valuable, functional materials on the basis of our recent research.
    The first example is lignin-based carbon fibers (CF). In their production, spinning is a first process. There are proposed two methods, melt spinning and electro-spinning. The latter method for lignin was reported in the last decade. The second process is thermostabilization. The resultant lignin fibers prepared by both methods have high thermal mobility, such as glass transition and thermal flow. Thereby, the fiber morphology is changed by direct carbonization. To prevent morphological change, the thermostabilization process is very important. However, it is a tedious and time-consuming process. We developed a novel type of lignin fibers, which was easily converted into thermally stable fibers by the treatment with concentrated hydrochloric acid for 2 hs. The final product, CF, prepared from the lignin fibers had comparable tensile strength to lignin-based CF reported previously.
    The other example for lignin-based functional materials is amphiphilic lignin derivatives, which are obtained by the reaction of isolated lignins or kraft black liquor with epoxylated polyethylene glycol. When these lignin derivatives were added to a saccharification medium using cellulase, the enzymatic saccharification efficiency was improved and residual activity of cellulase was maintained at a higher level. In addition, one type of the amphiphilic lignin derivative also had a superior ability for the cement dispersion to commercially available lignosulfonate that is well known as a cement dispersant.
    View full abstract
    Download PDF (488K)
  • The Present and the Future in Paper Electronics Using Printed Technologies
    Masaya Nogi, Hirotaka Koga
    2012 Volume 66 Issue 10 Pages 1126-1129
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1126
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Recently, a low-environmental-load method called “printed electronics” has attracted much attention. By this method, electronic devices are manufactured on polymer substrates using high-volume and high-speed printing technology, similar to printing of newspapers or magazines. Since the electric components are mounted on flexible substrates, printed electronic devices are rather lightweight and flexible to be carried around, offering high mobility. Moreover, the method of printed electronics enables the production of electronic devices of various sizes-from a tiny palm-sized device to a large-area device meant to be put up on a building wall, for example, e-books, solar cells, organic light-emitting diode (OLED) lightings, digital signatures, RFID tags, and health care sensors. Cellulose nanofiber sheets or paper have great potential as PE substrates because they have high transparency (similar to glass and plastics), high thermal stability (similar to glass), and high foldability (similar to traditional paper). In this article, the author introduced some applications of cellulosic paper in the electronic devices.
    View full abstract
    Download PDF (266K)
Introduction of Research Laboratories (90)
Research Report (Original Paper)
  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    2012 Volume 66 Issue 10 Pages 1134-1138
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1134
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    [in Japanese]
    View full abstract
    Download PDF (336K)
  • A New Technology of Process Water Treatment Using Fluid-Jet Cavitation
    Takaharu Noda, Hiromichi Tsujia, Shisei Goto
    2012 Volume 66 Issue 10 Pages 1139-1143
    Published: 2012
    Released on J-STAGE: October 01, 2013
    DOIhttps://doi.org/10.2524/jtappij.66.1139
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    A new technology using fluid-jet cavitation (CV-jet) has been developed in order to improve the quality of secondary fibers. CV-jet treatment was applied to process water in deinking. In this treatment, process water was injected into the reacting vessel by using a high-speed jet and cavitation bubbles were generated around the jet. The impact force produced by the collapse of the cavitation bubbles detached contaminants, such as ink and binder, from the surface of fines and ash particles. The effects of CV-jet treatments for process water in deinking were investigated in terms of the number of dirt speckles, the effective residual ink concentration (ERIC) and the brightness of the treated samples.
    The results showed that CV-jet treatment decreased the average size of dirt speckles in the process water, and the treatment also facilitated ink detachment from the fines in the water. The number and average size of dirt speckles after CV-jet treatment were decreased by the subsequent flotation. And the degree of dirt reduction after CV-jet treatment was much higher than without the treatment. The brightness of the fines after CV-jet treatment was also improved by the subsequent flotation. Similarly, the brightness gain through the flotation after CV-jet treatment was much higher than without the treatment. These results indicated that CV-jet treatments improved the quality of the fines in the process water, which were difficult to be improved by conventional deinking devices. Therefore, the CV-jet technology has the potential to improve deinking process.
    View full abstract
    Download PDF (181K)
Pulp and Paper Mills in Japan (40)
Coffee break
Papyrus
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top