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44 巻, 3 号
選択された号の論文の9件中1～9を表示しています
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小林 良生1990 年 44 巻 3 号 p. 285-293
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーIn R & D of high performance paper composing of new fibrous materials, traditional tequniques of fine Japanese paper, washi, and other related ancient papermaking or paper converting methods give some helpful hints and invaluable suggestions. Relationship or similarity between washi technology and modernized machine-made paper technology was exemplified in each unit process as well as starting raw materials.抄録全体を表示PDF形式でダウンロード (1089K) -
鈴村 洋, 杉原 正浩, 藤井 照重, 竹中 信幸1990 年 44 巻 3 号 p. 294-304
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーThis paper deals with recent advances of fundamental research on the mechanism of ring pattern for roll coating. When liquid films are produced by two-roll coaters, it is observed that the film is not uniform and undulates, which is called a “Ring Pattern”.
In roll coating such as printing and coating machines, paste coating for corrugating machine, an unevenness in the liquid film appears at almost equal pitches on the roll surface in the axial direction of the cylinder. This unevenness sometimes results in a nonuniform coating when transferred onto paper. This is a major cause of the reduction in quality of the coating.
Authors examined the behaviours and patterns of the ribs. Our result was summarized with recent advances of this field.
By experiment and mathematical model analysis, it was found that the effect of negative static pressure near the meniscus is closely related to the occurence of ring pattern.抄録全体を表示PDF形式でダウンロード (4734K) -
石津 敦, 飯塚 堯介, 飯山 賢治, 松本 雄二, 鮫島 正浩, 細谷 修二1990 年 44 巻 3 号 p. 305-326
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーPDF形式でダウンロード (7371K) -
原単位に影響する諸因子の解析と標準原単位の改定その1総括エネルギー委員会1990 年 44 巻 3 号 p. 327-341
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーPDF形式でダウンロード (1683K) -
山武ハネウエルの自動化技術本間 忠一1990 年 44 巻 3 号 p. 342-358
発行日: 1990/03/01
公開日: 2010/04/23
ジャーナル フリーThis serial report describes current topics in pulp and paper process instrumentation technology, and this paper focuses on the automation technology that Yamatake-Honeywell provides for the pulp and paper industry.抄録全体を表示PDF形式でダウンロード (6983K) -
1990 年 44 巻 3 号 p. 372-377
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーPDF形式でダウンロード (993K) -
趙 泰〓, 石川 久雄1990 年 44 巻 3 号 p. 378-390
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーThe object of this paper is to examine the influence of the changes in water retention value (WRV) of Douglas fir TMP by post-chemical substitution on the sheet density and the sheet strength.
TMP classified 42 wire mesh was modified by carboxyme-thylation and methylation to the various degree of substitution. Then, yeild, degree of substitution (DS) of the introduced groups, WRV, heat of wetting, crystallinity, sheet density and sheet strengths of each modified TMP were determined.
The following results were obtained.
1. Weight increase of TMP after carboxymethylation or methylation increased only a little and the rate of delignification during these reaction was relatively small.
2. WRV and heat of wetting of carboxymethylated TMP (CM-TMP) increased with an increse in DS of carboxymethyl group, while methylated, TMP (M-TMP) gave the maxima of WRV and heat of wetting at 0.37 of DS of methoxyl group. WRV of CM-TMP showed the greater value than that of M-TMP.
3. The crystallinity of CM-TMP and M-TMP fibers decreased with an increase in DS of carboxymethyl or methoxyl group. The decrease of crystallinity becomes more remarkable by carboxymethylation than by methylation.
4. Density of CM-TMP handsheets increased with an increase in WRV, while the density of M-TMP handsheets showed a maxima at 0.82 of DS of methoxyl groups.
5. An increase in TMP sheet density caused by the carboxymethylation and methylation results in the increase in tensile strength and burst factor of the handsheets. The both strengths of M-TMP showed a maximum at 0.37 of DS of methoxyl group. On the other hand, it was found that CM-TMP or M-TMP handsheets showed a maximum value with the tear factor.
6. It can be seen from the scanning electron photomicrograph that the enhance in TMP flexibility and conformability followed by swelling with the process of carboxymethylation or methylation results in increase in the relative bonded area between the fibers in the handsheets.抄録全体を表示PDF形式でダウンロード (10540K) -
江前 敏晴, 尾鍋 史彦, 臼田 誠人1990 年 44 巻 3 号 p. 391-398
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーThe latex content in coating colors and drying temperature have significant effects on the surface properties and pore structure of coated papers. The water penetration rate in coated papers was measured by an ultrasonic method. The principle of this method is to measure the ultrasonic attenuation through the z-direction of the paper sample through which water penetrates. The results were shown by the ultrasonic attenuation rate.
The following results were obtained from the ultrasonic method.
1. Since a clear difference in ultrasonic attenuation rate between the coating layer and base paper layer was observed it became possible to evaluate the structural differences in coated papers easily by this method.
2. Increases in latex content and drying temperature led to lower attenuation rate and longer penetration time in the coating layer.
Within the scope of the samples used in this work, it was confirmed that the increase in drying temperature led latex more concentrated near the coating layer surface by migration as measured by EPMA, while the whole pore size distribution was almost the same as determined by mercury intrusion method.抄録全体を表示PDF形式でダウンロード (1198K) -
三菱 奥山1990 年 44 巻 3 号 p. 399-400
発行日: 1990/03/01
公開日: 2009/11/19
ジャーナル フリーPDF形式でダウンロード (174K)
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