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Volume 46, Issue 8
Displaying 1-11 of 11 articles from this issue
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Tsutomu Naito1992 Volume 46 Issue 8 Pages 959-968
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSArtificial neural systems, also called neural networks, and neurocomputers, were spotlighted in Japan's recent announcement of their Sixth Generation project. This paper reviews these new systems involving the back-propagation algorithms and the adaptive resonance theory. Most of them have the advantages of self-learning and pattern recognition. There are so many cases in the paper industry where these advantages are required. If the hardware is only realized, we will be able to apply them to these cases, especially to process controls. It may herald the way for future thchnical break-through. The author has investigated applications of the neural system to evaluation of sheet formation and fiber analysis. These results led to the conclusion that the availability of conventional computer systems such as expert systems and statistical control systems would be an important factor in their use for the paper industry.View full abstractDownload PDF (1567K) -
Kenichiro Arai1992 Volume 46 Issue 8 Pages 969-980
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSGeneral examples of optically functional polymers are shortly reviewed, and then our investigations on development of cellulosic optically functional materials are described. Photoresponsive behaviors of cellulose p-phenylazobenzoate (AB-cellulose) as a photoresponsive material, which is reversibly isomerized under photoirradiation, are investigated and its swelling ability, contact angle with water, and formation of liquid crystalline phase are found to be controlled reversibly under irradiation with UV and visible lights, and optical resolution of amino acids appears to be also controlled in the thin layer chromatography using AB-cellulose as an adsorbent. Photoreactive behaviors of cellulose cinnamate as a photoreactive materials, in which the photoreaction is irreversible, are investigated and intermolecular cross-linking, fixation of liquid crystalline structure, and increase in physical strength of the cellulose cinnamate under irradiation with UV light are confirmed. Cellulose has some excellent inherent properties and is expected to be a raw material for development of new fuctional materials.View full abstractDownload PDF (1731K) -
Yuji Matsumoto1992 Volume 46 Issue 8 Pages 981-985
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
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Yoshiharu Kimura, Masao Hamada1992 Volume 46 Issue 8 Pages 986-996
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSPaper strength agents is required more effective application and quality improvement. By means of comparing with various strength agents, the factor that depend on improvement effect of paper strength can be identified. In acid condition, it is espesially important for effective application to investigate a mechanism that Alum participated in.
We have developed new strength agents which possess a superior effect for the improvement of paper quality by application of new polymerization technology. From differences in the mechanism, a superior effect of the new strength agent has been introduced.View full abstractDownload PDF (1723K) -
Part 3 Sludge Incinerators[in Japanese]1992 Volume 46 Issue 8 Pages 997-1018
Published: August 01, 1992
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESS1. There are 64 incinerators in 53 mills. The most tipical type of incinerator is rotary kiln, however, the numbers are decreasing than last questionnaire (1983). Fluidized bed type and cyclone type incinerator has increased instead of rotary kiln.
2. The total amount of sludge incinerated is 3, 800 t/D, and the 63% sludge is burned
3. Heat recovery has been performed effectively by fluidized bed type.View full abstractDownload PDF (2572K) -
1992 Volume 46 Issue 8 Pages 1019-1026
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
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Application of Surface AnalysesAkira Isogai1992 Volume 46 Issue 8 Pages 1027-1031
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
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[in Japanese]1992 Volume 46 Issue 8 Pages 1032
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (248K) -
Properties of Coating Color containing Amphoteric LatexYong-Kyu Lee, Fumihiko Onabe, Makoto Usuda, Kenzo Miyamoto1992 Volume 46 Issue 8 Pages 1033-1038
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSThe electrostatic interaction between coating color components affecting the viscoelastic properties and the interfacial electrokinetic behavior of coating color system was studied by using two types of latexes with the same styrene-butadiene ratio but with different surface charges ; one containing usual anionic groups (anionic latex) and the other containing both anionic and cationic groups (amphoteric latex).
The coating color containing amphoteric latex was found to have the following characteristics as compared with anionic latex :
1) The absolute value of zeta potential was remarkably decreased by lowering pH from around pH 7 and reversed to positive values below pH 4.
2) Viscosity was significantly increased below about pH 7.
3) Thermal treatment of the color resulted in irreversible gelation in nearly neutral conditions.
These phenomena indicate that the dissociation of amino groups on the surface of amphoteric latex is dependent on the pH of the medium, thus affecting the properties of coating color through the electrostatic interaction between clay and latex or between latex particles. The important finding is that the coating color containing amphoteric latex has as similar stability and viscoelastic properties as those of anionic color in alkaline conditions, suggesting the applicability to conventional operations in color handling and color application. When applied onto base paper, however, the characteristics of the amphoteric system come into play through possible changes in pH, thus resulting in favorable features of coated paper.View full abstractDownload PDF (846K) -
Shunnichi Shinagawa, Yaomi Kumagai, Hiroaki Segawa1992 Volume 46 Issue 8 Pages 1039-1044
Published: August 01, 1992
Released on J-STAGE: February 09, 2010
JOURNAL FREE ACCESSSericite, a fibrous variety of muscovite, was ground and classified by average particle size, ranging from 0.385 μm to 14.96 μm. In this report, the effect of these classified sericites on paper properties, such as tensile strength, smoothness, opacity and flame retardancy etc. was evaluated.
Tensile strength of sericite paper was compared with papers containing phlogopite, and calcium carbonate. The strength reduction in breaking length was greater with small particle size of fillers than with large ones. No effect of the shape of the filler, flaky or not, on the strength reduction of paper could be found.
The smoothness and opacity of the papers with smaller fillers were better than with larger ones.
Comparison was made on flame retardant of papers containing sericite with different particle size by the method of limited oxygen index (LOI). Papers, which contain more than 50 wt% of the smallest sercite (0.385 μm), showed self-extinguishing. However, in order to be self-extinguishing, the papers containing sericites larger than 2 μm, required filler content of more than 75 wt%.View full abstractDownload PDF (3801K) -
1992 Volume 46 Issue 8 Pages 1045-1052
Published: August 01, 1992
Released on J-STAGE: November 16, 2009
JOURNAL FREE ACCESSDownload PDF (1395K)
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