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Volume 25, Issue 2
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1971 Volume 25 Issue 2 Pages 30-42
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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Itsuki Nishi1971 Volume 25 Issue 2 Pages 57-58
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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Takashi Goto, Nobuyuki Unohara, Takeji Ozaki1971 Volume 25 Issue 2 Pages 59-64
Published: February 01, 1971
Released on J-STAGE: January 21, 2010
JOURNAL FREE ACCESSWe found an electrolytic treatment to be applied for decoloration in kraft pulp waste water.
The method takes advantage of aluminum hydroxide which is introduced by electrolysis from aluminum anode.
In the case of electrolytic treatment, ferric ion, aluminum ion, permanganate and hydrogen peroxide were added to the waste water.
We found that the color in waste water was removed under following electrolytic conditions : Distance between two electrode : 100mm, Current density : 200mA/50cm2, Volume of sample water 500ml, pH value : from 3.20 to 4.20.
The best condition of decoloration was obtained by 9min-electrolysis, adding the ferric ion (20mg/l) to the electrolyte. The waste water became entirely colorless.
When we added permanganate (40mg/lO2) to the electrolyte, the waste water became decolored and COD was decreased from 288.5ppm to 36.4ppm.View full abstractDownload PDF (1175K) -
Report II Tensile Strength, Elongation and Breaking Length of The Modified SheetsA.K.M. Lutfar Rahman, Mitsuo Fuujii1971 Volume 25 Issue 2 Pages 64-78
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
JOURNAL FREE ACCESSSubstantial increment in the strength characteristics of paper modified with polyvinyl acetate in the form of emulsion and solution by the three different procedures (1) beater addition (2) emulsion saturation (3) solution saturation, were achieved although beater addition gave slightly lower percentage of elongation than the base paper. It was found that the properties of the polymer modified sheets were more or less different owing to the difference in the methods of modification and the dissimilar mechanism of polymer-holding by the sheets. The degree of beating and the amount of resin retained in the sheets have profound significance on the sheet properties. Each of the properties of the sheets is discussed in the light of the effect of beating, the percentage of resin retention and the deposition mechanism of the polymer.
In Report I of this series (1), the methods of modification and the mechanism of polymer deposition in paper were described. In this investigation tensile strength, elongation and breaking length of the modified sheets will be described.View full abstractDownload PDF (5110K) -
Akira Onishi1971 Volume 25 Issue 2 Pages 79-82
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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Sakuro Uchiyama, Masahiro Taniguchi1971 Volume 25 Issue 2 Pages 83-85
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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Yoshiharu Furukawa1971 Volume 25 Issue 2 Pages 86-89
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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Koji Funaoka1971 Volume 25 Issue 2 Pages 91-93
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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Nobuyoshi Koizumi1971 Volume 25 Issue 2 Pages 94-101
Published: February 01, 1971
Released on J-STAGE: November 10, 2009
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