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Volume 36, Issue 7
Displaying 1-8 of 8 articles from this issue
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Koji Ohnishi1982 Volume 36 Issue 7 Pages 687-695
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSAnnual purchased energy which is consumed by pulp and paper industry in Japan is about 10, 000 thousand kl converted to heavy oil, accounting for 2.5% of the consumption nation-wide and 5% of manufacturing industry.
Secondary, along with increased energy cost which accounts for 21% of total pulp and paper products at shipment values, energy saving has become one of the important problems in management.
Thirdly, specific consumption of the purchased energy recorded around 22% of reduction in 1980 compared to 1975. This ratio is estimated to be around 24% and 25% at best in 1985 and 1990 respectively.
The performance of pulp and paper industry in energy saving thus far has been reviewed and future prospect are surveyed.View full abstractDownload PDF (1293K) -
Seiichiro Yonemasu1982 Volume 36 Issue 7 Pages 696-701
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSRecently the circumstances of energy supply in our country is faced with difficult problems because of its expensive price. Therefore the economical use of energy is demanded as the national theme.
In our pulp and paper industries, which consume a lot of energy, it is so important probrem as we try to pressure the pollution. May in 1980, we edopted “YEW IPL” and O2 control in our No. 3 Boiler for the purpose of the low excess-air combustion control.
The applicated digital-control engineering and the stable performance of O2 sensor gave us the beneficial operation with maintaining about 1.061.08 of the air-excess ratio.
Actually its efficiency rised to the extent of 0.8 percent (we can save about one million and five hundred thousand yen a month in the cost of fuel), and also NOx was decreased to the extent of 14 percent. Still more, we have been valuating the use of CO control since November in 1980.View full abstractDownload PDF (687K) -
Saeki Mill, Kohjin Co., Ltd.Kohjin Co. Ltd.1982 Volume 36 Issue 7 Pages 702-708_1
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSSaeki Mill of Kohjin Co., Ltd. started its operation in 1953.
Its area is about 830, 000 m2 and its employees are 360.
Manufactured there are dissolving pulp and various kinds of fermentation products. Dissolving pulp is one of Kohjin's major products since its establishment. By yeast fermentation with sulphite pulp waste liquor and extraction processes, RNA, GSH, NAD, Co-A etc. are manufactured in industrial quantities to meet the growing demands of the market.
Thus Kohjin is now one of the largest suppliers of these products in the world.View full abstractDownload PDF (1752K) -
Hisao Ishikawa, Katsumi Okubo, Tae Oki1982 Volume 36 Issue 7 Pages 725-732
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSIn connection with papermaking by Japanese traditional hand process, the filterability of mucin solution, sedimentation velocity of rayon pulp and stripping quality of wet paper prepared by this process were studied.
The effect of tororo-aoi mucin (TM) on papermaking property decreased by aging or by heating the mucin solution under the mild conditions. Close correlation was also confirmed between filterablity, sedimentation velocity or stripping quality decribed above and relative viscosity of TM solution. The effect of noriutsugi mucin (NM) and Pachira macrocarpa mucin (PM) on papermaking property was almost similary with the effect of TM.
From the results of measuring relative viscosity of TM solution, UV absorption spectrum of TM complex with toluidine blue and X-ray diffractogram of TM, it was assumed that a network structure of the mucin molecules is slowly broken by aging or by heating under the mild conditions.
From these facts, it was finaly discussed that a decrease in the effect of TM, NM or PM on papermaking property under the mild conditions occurs due to the initial conformational transition of an ordered, weak structure of these mucin molecules.View full abstractDownload PDF (1059K) -
Continuous Formation of Pulp Cement Board by Cylinder MachineMasao Hirajima, Mizutoshi Koga, Yoshinari Kobayashi, Ryukichi Matsuo1982 Volume 36 Issue 7 Pages 733-737
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSBased on conditions obtained by batchwise forming machine with suction, pulp cement board (abriviated as PC board) was continuously produced by a cylinder machine starting from roughly refined pulps recovered from municipal solid waste. The results obtained in batchwise formation were re-confirmed in these continuous experiments, which showed that there was no need to modify or change the production process adopted for application of newsprint waste as reinforcing fibers. PC board produced continuously also fulfilled both JIS and fire-preventing specifications. In conclusion, roughly refined pulp proved to be suitable industrial reinforcing fiber for PC board and this made purification process for recovry of pulp from the solid waste and also new application field as production of composite from the waste open.View full abstractDownload PDF (611K) -
III. Low Freeness in Unbeaten Pulps from Pilot PlantJunji Ohsawa, Tokiya Yaguchi, Yutaka Yoneda1982 Volume 36 Issue 7 Pages 738-742
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSThe C.s. freeness of unbeaten PFP (Pulp produced by the Pollution Free Pulping high yield process) from pilot plant was around 400 ml and extremely lower than that of commercial BKP (Bleached Kraft Pulp).
The cause of the low freeness value was investigated by 3 variables, such as specific surface area, specific volume and pulp consistency of filter bed during freeness test. The excessive PFP fines, which were secondarily produced during prefiberization stage, contribute to higher specific surface area and lower freeness. But low freeness in PFP is mainly due to its hemicelluloses because alkali extracted PFP and B·KP showed almost the same freeness. PFP hemicelluloses make fibers more flexible than B·KP and such flexible fibers give very compact filter bed during freeness test. Specific volume of PFP is not so different from B·KP in spite of its higher content of dilute alkali soluble hemicelluloses.
PFP gives higher consistency filter bed with lower specific surface area than B·KP of the same freeness.View full abstractDownload PDF (622K) -
1982 Volume 36 Issue 7 Pages 743-745
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (252K) -
1982 Volume 36 Issue 7 Pages 761
Published: July 01, 1982
Released on J-STAGE: November 19, 2009
JOURNAL FREE ACCESSDownload PDF (71K)
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