2006年1月 紙パ技協誌


The Backing Roll Auto-Sanding Device

Atsuo Murata
Robot and Environment Div., SERVOARM Co., Ltd.

 Servoarm Co., Ltd. is an enterprising company that makes the best use of its long cultivated hydraulic and electronic control technology to develop truly useful and problem solving devices to meet the particular needs of the customers.
 Among our many special purpose devices, The Backing Roll Auto-Sanding Device was nominated and won the most honorable award in the paper making industry, the “Sasaki Award”.
 This highly versatile device, not only cleans the contaminants off the backing roll during operation without stopping the line, it also polishes and grinds off scratches from the backing roll to keep its surface always clean.
 Although there were many problems when cleaning the backing roll, by introducing The Backing Roll Auto-Sanding Device, the following effects and merits have been achieved:
Operators are protected from the dangers of cleaning the roll during operation.
Quality of paper is maintained due to the clean roll.
Productivity is improved by lessening downtime of the operation line.
Life span of the backing roll and the coating machine related parts and apparatus are increased.
 Close collaboration with our customers is the key to new developments, and we at Servoarm continuously strive to develop new and useful devices to actively serve the paper making industry.

High performance Flotator for smaller ink particles removal, “ MT - Flotator”

Naouki Iwasige
Voith IHI Paper Technology Co., Ltd.

 Flotation is the most important process for increasing brightness, removing hydrophobic contaminants in Deinking system. Particularly, smaller ink particles have a big influence on brightness than bigger ones.
 Since 1985, many new Technologies were applied for NDIP (News to News) to detach ink particles from fibers and therefore improve appearance of the paper. As an example there is the  High consistency pulping, Serial Kneading/Dispersing, high consistency soaking and new type of Soap with strong penetration.
 The result was that ink particles were made smaller and smaller during the detachment of the deinking process. Because of that deinking system requires the removal of smaller particles by innovative flotators.
 In 1990, the MT-Flotator has been developed by Ishikawajima Heavy Industries (IHI), Ishikawajima Industrial Machinery (IIM) and was awarded the Sasaki’s prize by Japan Tappi on 2005. Since 2001, Voith-IHI Paper Technology Co., Ltd. is the developing centre of MT-Flotator technology. This presentation picks up some of the advanced technologies of the MT-Flotator. Additional to that the new generation of MTU-Flotator is also introduced.

Improvement to Reduce the Industrial Waste Using New Ecological Packaging System “Rock’n Pop System” for PPC Paper Products

Hideo Akikawa and Koki Takeda
Nichinan Mill, Oji Paper Co., Ltd.

 The stretched film are wrapped on the box of PPC to keep optimum stacking shape these boxes on a palette.
 We developed new system “Rock’n Pop System” to reduce the Wrapping film using water-solved glue during each PPC box.
 Therefore, we achieved to reduce the half of industrial waste.

Development of High-Quality Newsprint for Next Generation

Fuminari Nonomura
Nippon Paper Industries Co., Ltd.

 High quality newsprint features high opacity in multi color printing and also serves not only to increase the satisfaction of newspaper readers but also to enhance the value of paper as an advertising media. As a part of its initiative to develop high quality newsprint Nippon Paper     Industries has been taking several steps to employ neutralized paper manufacturing process in its mills since 1997. This led to the first manufacture of high quality newsprint at the Ishinomaki mill in 2003.
 It is expected that by June 2006, all eight mills inside and outside of Japan will be able to supply high quality newsprint.
 High quality newsprint apart from being manufactured under neutral conditions uses calcium carbonate as filler for enhanced opacity. Some of the advantages high quality newsprint offers in terms quality and eco friendliness are listed below:
・High opacity (Less show through)
・Lower emission of carbon dioxide
・Effective use of calcium carbonate originating from

The Experience of ECF Bleaching Plant Operation

Norimasa Miyake
Kishu Mill, Kishu Paper Co., Ltd.

 Kishu mill, Kishu Paper fiber line was converted to ECF bleaching sequence in August 2004. This plant was introduced to the hot chlorine dioxide process (DUAL-D), and this bleaching sequence has D*-EP-D.
 Also D*stage tower was adopted the gravity feed system (Difeed system) with the first installation in the world.
 Bleached pulp qualities has mostly expectation, especially brightness reversion is very low level.
 D*:hot chlorine dioxide stage

Development of Salt Tolerant Eucalyptus Globulus by Selection

Akira Murakami
Forestry Science Laboratory, Nippon Paper Co., Ltd.

 Selection of Eucalyptus globulus trees, which were excellent in growth and tolerance to aridity, was performed in the Western Australia plantations of Nippon Paper Company. In order to confirm the inheritance of the selected trees in an early stage, the salt resistance and drought resistance of those were estimated by laboratory testing of the cultured tissue and the clonal plantlets. It revealed that some individuals could survive for a short term when the salt contend reached the level of the seawater and the individuals had high drought resistance after watering was stopped. Trial plantations of the clones were started in Western Australia.

Present Situation and Future Prospects for the Establishment of JIS Pulp and Paper Test Standards

Takayuki Okayama
Tokyo University of Agriculture and Technology
Japan Tappi Pulp and Paper Testing Committee

 Recent activities of Japan Pulp and Paper Testing Committee are described in this paper. Four or five JIS drafts have been newly established and revised each year. Most of JIS drafts have been conformed to ISO standards step by step since 1998, so that JIS would not be become a non-tariff barrier.
 Recent JIS revisions are as follows. (1) Estimation of contraries, stickies and plastics of recycled pulps would be newly established in JIS pulp and paper test standards. (2) The diffuse reflectance method with the CIE illuminant C has been accepted in all optical determinations of JIS pulp and paper test standards. (3) The print-surf surface roughness has been standardized in 2004. Also the St?ckigt sizing method has been revised in 2004, although it is not established in ISO standards. (4) Some measurements with new technologies, such as determination of total chlorine and organically bound chlorine and fiber length measurement with automated optical analysis, would be prepared as JIS pulp and paper test standards.
 This paper summarizes 17 recent standards of JIS published or to be published after 2004.

Development of On-line Fiber Orientation Sensor System (Dielectric Type)
−Approach to the Practical Use−

Hidetada Sawamoto and Shinichi Nagata
Advanced Technology Research Laboratory, Oji Paper Co., Ltd.
Noriaki Kurogi
Nichinan Mill, Oji Paper Co., Ltd.
Junichi Kanayama
Yonago Mill, Oji Paper Co., Ltd.
Yoshiteru Setoguchi
Oji Engineering Co., Ltd.

 A newly developed on-line fiber orientation sensor was installed in a paper machine at Nichinan Mill, and its performance has been examined at a speed of 580-630 m/min. The accuracy of the measurement of the fiber orientation angle and orientation strength was quite satisfactory, when the data was compared to that obtained by conventional off-line SST and MOA measurements. An important factor that leads to stable and reliable data measurements is ensuring the uniform contact of the sensor-head with the surface of running paper. This was made possible by introducing a special air-driven mechanism to the sensor-head.
 This sensor system was found to be capable of measuring basis weight and moisture content of the paper while operating as a fiber orientation sensor. The results of these extra measurements are also reported.

Microstructural analysis of pigment on IJ media surfaces

Yukino Yasuta
Research Center, Mitsubishi Paper Mills Limited

 The pigmented colorants were observed by following methods.
 1) Quantity of colorants on the surface: To evaluate quantity of colorants on the surface of coated layer, media were milled by FIB and ultra microtome. In comparison with ultra microtome, FIB remained colorants layer and micro porous structure in original state.
 2) Surface roughness: Print gloss is related to surface roughness. Surface roughness of printed paper was observed by three different microscopic approaches (confocal microscope, 3D-SEM, AFM). Atomic force microscope is suitable method to measure the surface roughness.

Operational Experience of Paper Sludge Carbonizing Plant

Kazuaki Shimizu
Hokuetsu Paper Mills, Ltd.

 The Nagaoka Mill of Hokuetsu Paper Mills, Ltd has been registered to ISO14001 since 1996, making the most of its location in a nature-rich area to be a modern factory that can contribute to the society and environment. Since then we have aimed at environmentally friendly paper-making. In that attempt we found the problem; the disposal of PS (paper sludge) which has high load-environment. As the countermeasure we installed the PS carbonizing plant in August, 2003, and it started to be in commercial operation in March, 2004 after a long period of the test operation.
 This report shows the process of how we managed the problems that occurred during one year and three months of the commercial operation from its beginning to this June.

Operating Experience of Paper Sludge Incinerator

Minoru Fukuda, Hidenori Mochizuki and Hitoshi Kondo
Nippon Daishowa Paperboard Yoshinaga Co., Ltd.

 Nippon Daishowa Paperboard Yoshinaga Co., Ltd. has been trying to establish to be urban natural resources recycle mill which make good use of good geographical conditions located near the Tokyo metropolitan area.
 In Yoshinaga mill, New No.5 incinerator has been operated from December 2002 for the purpose of incinerating P.S. (paper sludge) and generating power for mills facilities. This incinerator has the maximum capacity of incinerating P.S. at 330 B.D. ton/d. The boiler generates 60t/h steam and the condensing turbine generator generates 10,300kW power.
 This report describes the outline and operating experiences of the incinerator and power generating plant.