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Volume 54, Issue 10
Displaying 1-18 of 18 articles from this issue
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[in Japanese]2000 Volume 54 Issue 10 Pages 1310
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (243K) -
Shun Kobayashi2000 Volume 54 Issue 10 Pages 1311-1320,027
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSEnvironment Agency announced a new guideline for developing environment accounting system entitled “Developing an Environment Accounting System (Report 2000)” in May, 2000. Environment accounting system makes it possible to evaluate quantitatively every movement for environment conservation by industries and public sectors.
This paper reviews efforts of Agency for publishing Report 2000, the framework of the system and its future development.View full abstractDownload PDF (2618K) -
Shohei Otaki2000 Volume 54 Issue 10 Pages 1321-1328,027
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSWith a dioxin debacle that occurred at Tokorozawa last year, the need to regulate dioxin discharge was discussed in many sectors. As a result, the law concerning special measures against dioxins was issued in July. 1999. The law specifies dioxin compounds, which newly include coplanar polybiphenylchloride besides old two types of dioxins, namely. polychlorobenzo-p-dioxin and polychlorobenzofuran.
The paper reviews why and how the law was established.View full abstractDownload PDF (2116K) -
Outline and ProcedureTakeshi Bito2000 Volume 54 Issue 10 Pages 1329-1341,027
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSEnvironmental impact assessment “EIA” is a social system that prevent environment growing worse by taking measures to protect environment appropriately based on the results of investigations, forecasts and evaluations about various impacts of development before the project will be enforced.
This system is applied to big projects, therefore up to now most workers in industrial enterprises have apt to interpreted that is almost unrelated with themselves except their companies will construct their new large factories. However, recently the cases setting up waste disposal facilities in factories are increasing on the paper industry in order to dispose industrial waste subsidiary produced by recycling old papers and the remains of goods. Accordingly it has been necessary to operate EIA by rules of local administrations in case of the scale of facility is large, either by rules of Waste Disposal Law revised at June 1997 in case of the scale of facility is small.
That's to say EIA is being to one of imminent subjects for industrial enterprises now.
So this is to introduce outline and procedure of EIA in Japan for persons who have possibility to need planning project according to the rule of EIA in future.View full abstractDownload PDF (3670K) -
Environmental Technology Committee JAPAN TAPPI2000 Volume 54 Issue 10 Pages 1342-1343
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
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1998 Statistics on Industrial Wastes Generation and their Utilization in Pulp & Paper Mills in JapanEnvironmental Technology Committee, Industrial Wastes Committee, En ...2000 Volume 54 Issue 10 Pages 1344-1351,028
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSWith co*operation of 109 paper mills, the 1998 Statistics on Industrial Wastes Generation and Their Utilization was summarized as follows: comparing to 1998, 1) the total amount was 2, 455×103 BDT and decreased only a little, 2) the utilization rate improved by 3 point to 28%, 3) the disposal rate reduced by 2 points to 15%.
The total quantity of utilized wastes was 1, 006×103 BDT, about 85% of which was composed of the three predominant wastes: pulp & paper sludge (429×103 BDT), boiler ashes (256×103 BDT) and fly-ashes (172×103 BDT). The large parts of these wastes were reused as raw materials in the domestic cement industry.
Energy recovery rate was still very low, but expected to increase gradually in the near future.View full abstractDownload PDF (1206K) -
Engineering Committee Japan Paper Association2000 Volume 54 Issue 10 Pages 1352-1354,028
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
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Toru Taguchi2000 Volume 54 Issue 10 Pages 1355-1366,029
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESS2000 TAPPI International Environmental Conference was held at Colorado Convention Center in Denver on May 7-10. The co-sponsors were PAPTAC, USDA (US Department of Agriculture) Forest Service and NCASL The main theme was “Setting the Environmental Course for the 21 st Century”. About 600 people got together to share and discuss their current environmental issues. There were 49 sessions and more than 100 papers were presented. NCASI had two sessions, one for all participants and another for the members only.View full abstractDownload PDF (2038K) -
Takanori Miyanishi2000 Volume 54 Issue 10 Pages 1363-1367,029
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESS2000 International Pulp Bleaching Conference took place in Halifax, Nova Scotia, Canada, during June 27-30 in 2000. Technical papers included 34 papers in the oral presentations and 40 papers in the poster presentations. They dealt with the topics of pulping, washing, oxygen delignification, ECF bleaching and system closure. Mill experiences with the medium consistency ozone bleaching were reviewed. Ozone has proven to be a practical and powerful bleaching reagent. When incorporated into an ECF sequence, ozone improved bleaching economy while significantly reducing environmental loading. Despite some ongoing concerns on NPE (non-process element) it is clear that ozone bleaching has found a firm place in bleaching.View full abstractDownload PDF (1203K) -
Wood Science Committee JAPAN TAPPI2000 Volume 54 Issue 10 Pages 1368-1384,029
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
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MRS-Mist Removal SystemAtsushi Kudoh2000 Volume 54 Issue 10 Pages 1385-1389,030
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThere has been a remarkable increase in the PM speed from approx. 800m/min in the 1970's to the current speeds of over 1, 700 m/min. Several factors have contributed to this development which began when the fourdriniers changed to fourdriniers with top formers and were followed by gap former machines.
Because of this revolutionary development in paper machine speed there are more and more demands put on the paper machine runnability. One special area where runnability problems are having serious results is the wire section. This article concentrates on highlighting the mist as a cause of wire section runnability and paper quality problems and how these problems are eliminated by the Mist Removal System developed by EV Group Oy.View full abstractDownload PDF (2622K) -
Jiro Isobe2000 Volume 54 Issue 10 Pages 1390-1392,030
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSMillennium is a state-of-the-art system which has the following three targets as Paper Machine Control System: 1) Miniscule quality variations, 2) No sheet breaks, 3) Less than 2 minute grade changes. For example, measurement and control of cross-direction basis weight are to be explained hereafter.
Basis weight control are limited by the following four items: 1) Profile measurement precision, 2) Measurement filtering time, 3) Process dead time, 4) Mapping.
Improved basis weight profile control is as follows:
1) The new Solid-state Silicon Technology (SST) basis weight sensor. This third-generation sensor uses a fast, high-efficiency silicon detector to measure basis weight instead of the high-noise ionization chamber used by conventional sensors.
2) No filter is used for measuring. The correct data are measured instantaneously without time delay even at high scan speeds.
3) Using the instantaneous data without filtering, process dead time is compensated correctly.
4) The efficiency of CD control is improved with precise mapping between the zones of measurement and control.
The improved control creates quality and financial benefits:
1) Improved paper uniformity due to increased CD and MD profile stability, 2) Increased productivity and financial returns due to improved machine run ability and the ability to make faster grade changes.View full abstractDownload PDF (1171K) -
[in Japanese]2000 Volume 54 Issue 10 Pages 1393
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
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Pulping of Hardwood and Annual PlantsWahyu Eko Widodo, Junko Kajimoto, Yoshihiro Sano2000 Volume 54 Issue 10 Pages 1394-1402,031
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSIn order to establish a new pulping process of hardwood and annual plants, a HBS pulping process with aqueous solvent of high boiling point was investigated using birch, beech and eucalyptus wood chips for hardwood and oil-palm wastes (empty fruit bunch and frond), agricultural wastes (baggase, rice straw and wheat straw) and kenaf stalk as annual plants. All of the materials were pulped with 80% aqueous HBS containing 0-10% AcOH at 190-200°C for 2-3h. The strength properties of HBS pulp were inferior to those of corresponding kraft pulp, but comparable to those of organosolv pulps. Waste liquor and washings were divided into water insoluble HBS lignin and water solubles. RHBS, which was obtained by evaporating of the water fraction from the latter, consisted of HBS, sugars, and low-molecular lignin and sugar-modified products. A 80% Aqueous RHBS was able to use at least 5 times as a pulping solvent indicating that the HBS method is the pulping process of wood and annual plants with saving-energy, saving-resources and non-polution.View full abstractDownload PDF (1859K) -
Report 2: Structural Changes of Cigarette Paper during Thermal Decomposition ProcessAtsunari Hanada, Fumihiko Onabe2000 Volume 54 Issue 10 Pages 1403-1413,031
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSIn the first paper of this series. a set-up of the system for measuring the changes of cigarette paper properties under thermal decomposition process was reported. It was suggested there that the changes of cigarette paper properties were caused mainly by deformation of fiber network, the changes in the properties of single pulp fiber, increase in pores in paper structure, and interconnecting structure during thermal decomposition process.
Since the cigarette paper has a porous structure, its function for transporting substances is quite important.
With these results in mind, this work is intended to investigate the pore structural changes of cigarette paper under thermal decomposition process. For this purpose, the pore structure and the surface area of heated papers at different temperatures were measured, and the results were correlated with the change of cigarette paper properties.
The results associated with the pore structure of thermally treated cigarette papers are summarized as follows.
The total pore volume of heated papers increased with temperature over 250°C. The micro pore volume and the BET surface area of heated papers slightly increased at temperature region between 150 and 300°C and decreased over the temperature region between 300 and 320°C and increased again above 320°C. The change in the mercury penetration/retraction ratio of heated papers depends upon the beating degree of pulp.
The density of heated papers increased at temperature region between room temperature and 200°C and decreased over 200°C.
The average pore diameter of heated papers increased at temperature over 200°C.
It was also shown that at the pore size region between 15 and 20μm of the pore size distribution increased over 320°C.
These results suggest that the porous structure of cigarette paper changes by thermal treatment, and the pore structural change is remarkable at temperature region between 270°C and 350°C where thermal decomposition of cigarette paper proceeds significantly.View full abstractDownload PDF (2513K) -
Junko Seki, Yasuyuki Kamijo, Takanori Miyanishi2000 Volume 54 Issue 10 Pages 1414-1422,032
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSThe effects of cationic agents on the retention and development of sizing with emulsion rosin size were studied under acid papermaking.
The retention of emulsion rosin size was affected by alum and cationic polymers such as size fixing agents and retention aids. Cationic polymers were consumed primarily in the retention of ash rather than retaining rosin size. In the presence of alum the development of sizing on the handsheets took place when the rosin size contents were greater than 0.25%. Without alum addition, however, sizing development on the handsheets didn't take place in spite of adequate rosin size concentration. The results suggest that, the fixing mechanism of rosin in handsheets, prepared with and without alum was different.View full abstractDownload PDF (1816K) -
Asikaga Mill2000 Volume 54 Issue 10 Pages 1423-1427
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (2133K) -
2000 Volume 54 Issue 10 Pages 1428-1429
Published: October 01, 2000
Released on J-STAGE: October 27, 2010
JOURNAL FREE ACCESSDownload PDF (443K)
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