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Volume 14, Issue 1
Displaying 1-9 of 9 articles from this issue
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[in Japanese]1960 Volume 14 Issue 1 Pages 2-4
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
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[in Japanese]1960 Volume 14 Issue 1 Pages 5-10
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
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[in Japanese]1960 Volume 14 Issue 1 Pages 11-15
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
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Kaoru Muramoto1960 Volume 14 Issue 1 Pages 16-21
Published: January 10, 1960
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSIn this experiment Yield value (v), Plastic viscosity (U) and Leveling index (L. I) are determined by Brook-field visco-meter.
It is necessary that coating color has thixotropic property to get smooth coating surface by the Multiple Roll Coater.
When the coating color leveling index is over 0.34 and its ratio of v/U is over 13 the coating surface keeps less orange peel or pattern.View full abstractDownload PDF (1037K) -
1 Part Rheology of Casein SolutionKaoru Muramoto1960 Volume 14 Issue 1 Pages 22-28
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSConsistency variables are introduced by Brookfield viscometer as below,
p=2ηΩdyne/cm2
V=2Ωsec-1
The viscosity of ammonium caseinate solution at 20°C, pH 9.2, depends upon Arrhenius-Duaclau's equation.
The solution immobilizes its solvent to gelation and gives structural viscosity.
When the consistency is between 1013g/100cc, it shows gel-solution and over 13.0g/100cc, the molecular particles associate one another to compose gel-structure.
In low consistency, flow type is Newtonian and in high, plastic.
The higher the temperature, the lower the elasticity and therefore it can be said that it belongs to energy elasticity.
If shearing stress is given instantly, then a constant and continuous rate of shear, relaxation of elastic stress takes place.
Thus, the solution becomes as near as Maxwell liquid which consists of Hookian elasticity and Newtonian flow property.View full abstractDownload PDF (1159K) -
(Part 1) The Effects of Beating, Lignin and HeatingYuichiro Take, Takauki Ota1960 Volume 14 Issue 1 Pages 29-34,28
Published: January 10, 1960
Released on J-STAGE: February 12, 2010
JOURNAL FREE ACCESSThe effects of beating-degree, lignin content and heating condition upon the vapour absorbing properties of paper were investigated.
(1) The moisture content of paper slightly increases with the increase of beating-degree, while the diffusion coefficient of water vapour decreases.
(2) L. B. K P contains large amount of pentosan, but its moisture content is comparatively small.
(3) Both the moisture content and the diffusion coefficient remarkably increase with the increase of lignin content.
Between the moisture content and the lignin content, the following experimental equation exists :
M=0.1033X+9.633
where, M is the moisture content (%) at 65% RH, 20°C, and X is lignin content (%).
(4) The moisture content remarkably decreases with the increase of heating temperature and time.View full abstractDownload PDF (1018K) -
Seishi Machida, Sadanori Nishikori1960 Volume 14 Issue 1 Pages 35-39
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSIn connection with paper-making by means of Japanese traditional hand-processes, the behaviours of solutions of Tororo-aoi mucilage, sodium alginate and sodium polyphosphate were studied.
Viscosity and filterability of the solution and sedimentation velosity of pulp fibers in the solution were not found to relate so much to the dispersing and sizing properties of the solution on the paper making.
Sodium polymetaphosphate behaves comparatively similar to the Tororo-aoi mucilage.
Sodium alginate can be used only in an appreciably viscous solution in place of Tororo-aoi mucilage, and decreasing of viscosity in the sodium alginate solution is accelerated by adding hydrogen peroxide ;but the paper making properties of the solution in such a condition were found to differ much from those of the Tororo-aoi mucilage.
Dispersibility of sodium alginate solution was not found to be improved by using some surface active agents of non-ionic type.
The paper making properties of the mucilagenous solution were found to be concerned with adsorption of the mucilage on pulp fibers.
It was concluded that the mucilage is adsorped to pulp fibers in water and, cooperating with hemicellulose of the fibers, causes the fibers to be well dispersed to accomplish a good distribution of fibers in the fiber mat and prepare the superior paper.View full abstractDownload PDF (1047K) -
M. Hashimoto, M. Sinozaki, T. Kobayashi, T. Kawahara1960 Volume 14 Issue 1 Pages 40-43
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
JOURNAL FREE ACCESSAt the present time, as every body knows, hard wood pulp has been used in great quantities for various species of paper and board.
More over Copse has come to be used besides beech wood that has been considered as the typical wood for which studies have been made.
This may be due partly to various conditions of material, but mainly because the characteristics of hard wood fibres have be fully acknowledged to make superior kinds of paper and board.
This report has been prepared, because our mill has been using hard wood as sulphate pulp and as to 26 species of chief hard wood which are the materials mostly used in this mill, we experimented their cooking, yield, bleaching and strength by means of the sulphate pulp.View full abstractDownload PDF (696K) -
[in Japanese]1960 Volume 14 Issue 1 Pages 44-50
Published: January 10, 1960
Released on J-STAGE: November 18, 2009
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