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Volume 42, Issue 1
Displaying 1-18 of 18 articles from this issue
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Yoshinobu Yonezawa1988 Volume 42 Issue 1 Pages 1-2
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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[in Japanese]1988 Volume 42 Issue 1 Pages 5-8
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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Yoshinobu Yonezawa1988 Volume 42 Issue 1 Pages 9-18
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSGood morning, ladies and gentlemen. It is a great honor for me to have an opportunity to address at an opening the 1987 JAPAN TAPPI Annual Meeting.
This year is the 40th anniversary of JAPAN TAPPI. I am pleased to learn that we have about 500 attendants gathering at this meeting here in Hachinohe City today, even though our institution had a series of big events such as the memorial ceremony and the memorial lecture recently.
This year, we will have special lectures. “The Technology of Developing New Grades of Apples” by Mr. Kudo, Manager of Aomori Apple Experiment Station, and “Super Conductivity” by Professor Fueki of the Faculty of Engineering of Tokyo University. In addition, we have 10 presentations by the participants and also exhibitors' explanations about their products which are scheduled at another hall as a new attempts. I hope that this meeting will be a fruitful opportunity for your mutual communication and technological research.
On this occasion, I as the president of JAPAN TAPPI, would like to direct my remarks on several issues surrounding the pulp and paper industry.View full abstractDownload PDF (3316K) -
Makio Hasuike, Koji Murakami1988 Volume 42 Issue 1 Pages 21-22
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1988 Volume 42 Issue 1 Pages 23-26
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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[in Japanese], [in Japanese], [in Japanese]1988 Volume 42 Issue 1 Pages 27-29
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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Kazuo Fueki1988 Volume 42 Issue 1 Pages 30-45
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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Shinichi Hara, Takeo Ono1988 Volume 42 Issue 1 Pages 46-51
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSA new Kraft white liquor oxidation process has been demonstrated. The process using a novel catalyst can effectivily produce a polysulfide cooking liquor.
The selected catalyst is a granulated activated carbon, characterized by a large pore volume occupied with pores more than 10 nm diameter. This catalyst has high oxidation activity and selectivity of polysulfied formation. The polysulfide yield in higher than the reported value.
One year pilot plant test exibited steady performance using mill white liquor. The long life of the catalyst was attained by installing a special designed filter to remove suspended solids which would accummlate on the catalyst. The filter, up-flow type, contained sand bed which removed 95% of incoming solids.
The pilot plant data were correlated as an empirical equation for polysulfide production rate with temperature, liquid hourly space velocity, air/liquid ratio, and the catalyst activity.
The first commercial plant was in operation from July '87 at Shirakawa Mill of the Mitsubishi Paper Mills Ltd., without any trouble. The pulp yield is up at least 1% with same or better quality.View full abstractDownload PDF (979K) -
Masayuki Kimura1988 Volume 42 Issue 1 Pages 52-55
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThe M-C oxygen delignification system for the eucalyptus line of our mill has started operation in January 1986.
The Kappa number and viscosity reduction are around 49 % and 19% respectively.
Also, the good results are shown in terms of brightness and dirt content.
Whereas, the reduction of total effective chlorine consumption and COD in the bleaching process are approximately 30 % and 50 %, respectively.View full abstractDownload PDF (428K) -
Hiroyoshi Yamada1988 Volume 42 Issue 1 Pages 56-59
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSAt Ebetsu mill, where the kraft pulp production is based on mixed domestic hardwoods, a medium consistency oxygen bleaching stage has been in operation since Nov. 1985. The Kappa No. is reduced by 40% as an average in the oxygen stage. Bleaching chemical consumption in subsequent bleaching has been reduced also by about 40%. As a consequence, bleaching costs have been cut by more than 30 %.View full abstractDownload PDF (560K) -
Hisao Kitano1988 Volume 42 Issue 1 Pages 60-65
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESS400 t/H Powdered coal boiler & 57, 000 kW turbine-generater was constructed in Kushiro mill of Jujo paper Co., Ltd., and they were started to operate November, 1986.
The all equipments have been well operated, and the economical effect expected at the planning is accomplished.
General view of the equipments, operation and control are mentioned below.View full abstractDownload PDF (1157K) -
Teruo Nishibe1988 Volume 42 Issue 1 Pages 66-70
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThis is a introduction of a petroleum coke co-firing boiler which was converted from heavy oil-fired boiler. This petroleum coke co-firing boiler is located in Futatsuka works Toyama prefecture, and being operated since December 1984.
This converted boiler had some probrems in burner and draft at the initial few months.
However, these problems were solved through new trials and now this boiler has been operating very well in these years.View full abstractDownload PDF (698K) -
Research of the Headbox and the Pilot Plant Test.Tadayoshi Nomura, Tohru Shimizu1988 Volume 42 Issue 1 Pages 71-78
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThis paper reports on the outlines of (1) development of headbox, an important elemental technology in this study, and (2) paperforming test on the pilot plant.
Photographs of the pulp suspension jets from several “saw blade type” headboxs were taken under strobe light, and the stability of the jets were estimated by an image processing analysis.
Pilot plant tests were conducted with the condition of 0.7% to 3% headbox consistency and 600 m/min wire speed. Influences of jets' stability and pressure loss of headboxes to the formation of sample sheets were examined. Quality of the sheet samples (sheet formation, strength, printability etc.) and process data (energy consumption, retention etc.) are described and discussed. Several sheets were found to be of commercial printing paper grade.View full abstractDownload PDF (2956K) -
Chuichi Honma1988 Volume 42 Issue 1 Pages 79-85
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThis Paper describes paper sheet fault detectors, using at Honshu Paper Co., Ltd.
These type of detectors are as follow.
·CCD type
·CCD streak sensor
·Fuji laser type
·Kitadenshi type
·Nagoya denki kogyo type.View full abstractDownload PDF (4824K) -
Seiichi Miyamoto, Yoh Tajima1988 Volume 42 Issue 1 Pages 86-94
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSEvaluation of printing quality is generally conducted in strict manner within a narrow quality variation. In order that the evaluation results by means of image processing correspond with those of naked-eye evaluation, the image processing method should be capable of evaluating as many quality items as possible with highest accuracy, giving reasonable emphasis on some specific items, so that overall evaluation result can be justified. Even though image processing evaluation can express numerically paper printability and performance of such printing materials as ink and blanket, it is very difficult to evaluate printed matters themselves numerically, and for this reason, we have no way at present but to rely on naked-eye evaluation. With the use of the image processing system having such a restriction, we carried out experiments, providing the same prints on various paper grades, to check into the correlation between the numerical method and sensual method.View full abstractDownload PDF (4958K) -
Yasuo Yasueda, Eiichi Shekine, Shohei Sato, Khoichi Otake1988 Volume 42 Issue 1 Pages 95-100
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSWe examined the influence of the blanket's compressibility for sheet offset printing quality on coated papers by means of two commercial blanket's have its own compressibility on a practical printing press (ROLANDPALVA RZP-1)
We got next results.
1. The printing paper's surface roughness gives lesser influence to halftone reproduction than the blanket's compressibility.
2. The hard blanket gives higher dot gain than the soft one ; higer P/B pressure gives poor halftone shapes.
3. The high B/I pressure gives rich ink transference : We expect that the hard blanket has rich ink transference.View full abstractDownload PDF (2441K) -
Masaru Umemoto1988 Volume 42 Issue 1 Pages 101-104
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSRecent growth of the output of printing ink shows roughly proportional trend to that of GNP, namely, the printing ink industry can be said to have grown into the matured stage of the industrial growth.
In this report, I tried to offer some suggestions on the required functions for the future printing ink as well as on the desirable future strategy of the printing ink industry in general.
Now the restructuring of the printing ink industry is proceeding in a global scale. In the technological aspect, there are fierce competitions both over the developement of the innovative functional ink and over the modification of the conventional ink among many manufacturers including those newly embarking on this field. Successive research works free from conventional rigid systems, and thus the inter-field cooperation would be all the more necessary.View full abstractDownload PDF (478K) -
1988 Volume 42 Issue 1 Pages 109-111
Published: January 01, 1988
Released on J-STAGE: November 16, 2009
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