巻号一覧
前身誌
26 巻, 1 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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井上 親之1972 年 26 巻 1 号 p. 1-3
発行日: 1972/01/01
公開日: 2009/11/10
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町田誠之1972 年 26 巻 1 号 p. 4-8
発行日: 1972/01/01
公開日: 2009/11/10
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坂本 英雄, 葛野 定雄1972 年 26 巻 1 号 p. 9-18
発行日: 1972/01/01
公開日: 2009/11/10
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十河 村男, 山崎 徹, 幡 克美1972 年 26 巻 1 号 p. 19-25
発行日: 1972/01/01
公開日: 2009/11/10
ジャーナル フリーSome experiments were carried out on the manufacture of pulp for paper by hydrotropic cooking, and the results are described. Sodium salts of toluensulfonic (A), salicylic (B), benzoic (C) and mesitylene-carboxylic (D) acids were employed as hydrotropic reagents. Wood meal of beech was cooked with the aqueous solutions of hydrotropic salts of various concentration at 170°C for 2 hours. The pulping effects with the C solution was also examined by adding sodiumhydroxide, sodiumsulfide, or sodiumsulfite as assistant reagents. Based on the results obtained in the above experiments, several kinds of hydrotropic pulp were prepared from wood chips, and their properties were compared with those of a bisulfite pulp. 1. The delignification effect was in the order of B>D>C>A in cooking with the solution of hydrotropic salts of the same concentration. It is noteworthy that the salt of B, having hydroxyl group but hydrophobic group, showed to be superior in delignification action to the other hydrotropic salts. The cooking liquor with A turned to acidic during the cooking process, and consequently the amount of hemicellulose removed was greater than that in the case of the solutions of the other hydrotropic salts. Accordingly, it is presumed that benzenecarboxylic acid salts are preferable to benzenesulfonic acid salts as the hydrotropic reagent in the manufacture of pulp for paper. 2. In cooking of wood chips with thickness less than 1.5 mm, it is possible to obtain a delignification effect approximated to the case of wood meal. 3. The quality of hydrotropic pulps is somewhat inferior, comparing with that of bisulfite pulp having the same lignin contents. 4. Use of sodiumhydroxide as assistant reagent in cooking with the C solution is rather unpractical. In the cooking of wood chip, however, when used 45% of sodium sulfide or sodiumsulfite as assistant reagent, hydrotropic pulp with good mechanical properties was obtained retaining larger amount of hemicellulose.抄録全体を表示PDF形式でダウンロード (1359K) -
村田 正男, 中田 幸次郎, 遠藤 恭延1972 年 26 巻 1 号 p. 26-32
発行日: 1972/01/01
公開日: 2009/11/10
ジャーナル フリーOne big advantage of using the β-rays in measuring paper formation, instead of light which has been commonly used, is that the distribution of basis weight in paper can be directly measured, not affected by the color or the density variation of paper. However, one of the disadvantages in this method is that the size of measuring spot must be set much larger than that in the light transmission method. So we have developed a new measuring method, using the β-rays within the safe activity to handle, in which the basis weight variation can be measured of such a small area of approximately 25×25μ as not to be measured by the light transmission method. In this method the specimen is radiographed by the β-rays plastic sheets (poly-methyl methacrylate) containing Carbon 14 ; the transmission of the β-rays is photographed by Kodak "Crystallex" X-ray film; then the basis weight variation is measured by the optical density variation in the X-ray film. In this method paper formation can be measured within the measuring error of 4 to 5% under careful operations. Some applications of this method are described.抄録全体を表示PDF形式でダウンロード (1950K) -
宍戸 弘史1972 年 26 巻 1 号 p. 33-39
発行日: 1972/01/01
公開日: 2009/11/10
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山本 寿彦1972 年 26 巻 1 号 p. 40-46
発行日: 1972/01/01
公開日: 2009/11/10
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編集部1972 年 26 巻 1 号 p. 47-49
発行日: 1972/01/01
公開日: 2009/11/10
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1972 年 26 巻 1 号 p. 57-58
発行日: 1972/01/01
公開日: 2009/11/10
ジャーナル フリーPDF形式でダウンロード (2993K)
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