巻号一覧
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15 巻, 11 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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尾間 忠勝1961 年 15 巻 11 号 p. 708-712,723
発行日: 1961/11/20
公開日: 2009/11/17
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亜硫酸パルプ廃液よりリグニンスルホン酸の分離 (その3)小島 義一, 林 晄, 舘 勇1961 年 15 巻 11 号 p. 713-717
発行日: 1961/11/20
公開日: 2009/11/17
ジャーナル フリーIsolation of ligninsulfonic acid (LSH) with precipitating its dicyclohexylamine (DCHA) salt from sulfite spent liquor (SSL) was studied.
When water solution of mineral acid salt of DCHA was added, SSL was so much diluted that yield of LSH was very low, because solubility of mineral acid salt of DCHA was very poor.
If DCHA was added to SSL directly after removing of calcium sulfate by addition of sulfuric acid, good yield of LSH was obtained. Moreover, concentration of SSL was the higher, yield of LSH was the better.
For example, when 1.5 equivalent DCHA per sulfonic residue of LSH was added to concentrated SSL (LSH content: 31%), yield of LSH was about 80% and fractionation by molecular weight was recognized between precipitated LSH and remaining LSH.
Changing to Na-LS from LSH·DCHA and recovery of DCHA from LSH·DCHA were easily accomplished by steam distilating after addition of equivalent NaOH.抄録全体を表示PDF形式でダウンロード (1063K) -
戸田 久昭, 木島 常明1961 年 15 巻 11 号 p. 718-723
発行日: 1961/11/20
公開日: 2010/02/10
ジャーナル フリーBleached sulfite, bisulfite and sulfate paper pulps and linter pulp were beaten by Lampen mill or TAPPI standard test beater, and their brightness drops were compared.
Sulfite pulp decreases generally greater than sulfate pulp in brightness as freeness decreases by beating, and the brightness drop increases also with the hemicellulose content in the same kind of pulp (Table 1 and 2, and Fig. 1, 3 A and 4 A). This reason is due to that the pulp, which is rich in hydrophilic hemicellulose and higher in swellability, increases greater in fiber-to-fiber bonded area, namely decreases in non-bonded area, in the dried pulp sheet beaten at the same freeness, and consequently decreases the proportion of the light reflected out of the sheet.
However, the brightness decreases similarly as the water retention value of the wet pulp increases and the specific scattering coefficient of dried pulp sheet decreases by beating, irrespective of the kind of pulp and the hemicellulose content (Fig. 2, 3 B and 4 B)
Same tendency is observed too, when the pressure to wet pulp sheet is changed (Fig. 5).
That the bleached paper grade pulps, especially high yield pulps, are generally inferior to the dissolving pulps in brightness of unbeaten pulp sheet, is mostly attributed to the richer bonded area (poorer non-bonded area) of dried sheet owing to the higher content of hydrophilic hemicellulose (Table 1, 2 and Fig. 6).
It seems that the brightness is affected also with the difference of morphological fiber structure owing, to the wood species.抄録全体を表示PDF形式でダウンロード (969K) -
太田 節三1961 年 15 巻 11 号 p. 724-732
発行日: 1961/11/20
公開日: 2010/02/10
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木田 和夫, 北山 要1961 年 15 巻 11 号 p. 733-738,754
発行日: 1961/11/20
公開日: 2010/02/10
ジャーナル フリーIn this paper, a centrifugal pump which is designed especially for high consistency paper stock is studied experimentally. it shows that the paper stock of 9.5 per cent consistency (bone-dry) can be handled by this pump with more excellent results than those ever obtained by other similar pumps. Such excellent results seem to depend upon the wide passage of pump impeller and sufficient suction pressure by the large chest with an agitator. This report describes how the characteristics of the pump are influenced by the consistency of paper stock and suction pressure.
The results obtained are mainly as follows :
(1) The efficiency and bead of centrifugal pump with an open impeller increase with paper stock consistency for a limited extent, because the leakage through the running clearance between impeller blades and casing wall becomes negligible at high consistency.
(2) In order to pump up high consistency paper stock, the suction pressure must be increased linearly ith the consistency ranging from per cent to 9.5 per cent.抄録全体を表示PDF形式でダウンロード (3413K) -
和紙生産の統計的考察加藤 晴治1961 年 15 巻 11 号 p. 739-750
発行日: 1961/11/20
公開日: 2009/11/17
ジャーナル フリーBy considering the above-mentioned various statistics, hand-made Japanese-paper brings forth a big problem how to develop itself in future.
Going on with the present condition, there can be nothing for it but to diminish.
Therefore, we should use such valuable fibres as Kozo, Mitsumata, Gampi etc. not for the goods of mass-consumption, but for the valuable goods ; for instance, fine art paper, drawing paper (Gasenshi), hand-writing paper and so on.
Comparing with foreign paper, machine-made Japanese paper etc., hand-made Japanese paper is remarkably longer in its durability. So that, it should he used for the directions in need of eternal. preservation.
Especially, utilizing gampi-paper for eternal keeping printed matters is also reckoned worthy of consideration.抄録全体を表示PDF形式でダウンロード (1811K) -
1961 年 15 巻 11 号 p. 751-752,754a
発行日: 1961/11/20
公開日: 2009/11/17
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浜田 文男1961 年 15 巻 11 号 p. 753-754
発行日: 1961/11/20
公開日: 2010/02/10
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北商事(株)1961 年 15 巻 11 号 p. 755-758,772
発行日: 1961/11/20
公開日: 2009/11/17
ジャーナル フリーPDF形式でダウンロード (1057K)
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