巻号一覧
前身誌
33 巻, 8 号
選択された号の論文の7件中1～7を表示しています
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山口 章1979 年 33 巻 8 号 p. 491-499
発行日: 1979/08/01
公開日: 2009/11/10
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A. M. Ayroud1979 年 33 巻 8 号 p. 500-508
発行日: 1979/08/01
公開日: 2009/11/10
ジャーナル フリーConsolidated-Bathurst社はカナダの新聞用紙メーカーで, N, L材のSP高収率に関する経験は豊富である。実験室段階から工場操業へ移すための検討はパルプ化条件とそのパルプ品質に重点が置かれた。
本報では高収率SPにおける各種可容性ベースの比較と最終的にNa-ベースを採用するにいたった経緯について記すことにした。また,この高収率SPの新聞用紙以外の用途への可能性についても記した。さらに,本高収率SP製造に伴う排水問題についても言及し,その解決法としての生物処理法についても記述した。抄録全体を表示PDF形式でダウンロード (1096K) -
東洋パルプ (株) 呉工場東洋パルプ株式会社1979 年 33 巻 8 号 p. 509-522
発行日: 1979/08/01
公開日: 2009/11/10
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宇佐見 国典, 西田 篤実, 熊谷 宏1979 年 33 巻 8 号 p. 523-528
発行日: 1979/08/01
公開日: 2009/11/10
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「紙の伸縮安定性に関する研究」第5報木島 常明, 山川 功, 新居 秀彦1979 年 33 巻 8 号 p. 529-535
発行日: 1979/08/01
公開日: 2009/11/10
ジャーナル フリーThis paper is intended to measure the moisture content under the various humidity and temperature and shrinking stress during desorption for handmade sheets and laboratory foundrineir machine made sheets.
The relation between the stress and moist-expansivity was also discussed for above mentioned sheets. The results obtained are summerized as follows :
1) Under the same relative humidity, papers showed slightly higher moisture contents at lower temperature in the range of 10°C to 40°C. However, moist-expansivity of the papers were not affected by temperature.
2) There was good correlation between relative humidity and stress of papers during desorption.
3) Stress of papers during desorption varied depending on the wood species, pulping process and the degree of beating. But the relations between shrinking stresses during drying and desorption were not different in these pulps.
4) Moist-expansivity of papers depended on the drying process, however, stress during desorption was not affected by drying process.抄録全体を表示PDF形式でダウンロード (969K) -
パルプへのガンマ線照射森 見二, 長谷川 圀彦, 佐々木 透1979 年 33 巻 8 号 p. 536-541
発行日: 1979/08/01
公開日: 2009/11/10
ジャーナル フリーThe dissolving pulp (DP) involving no lignin and the cold soda pulp involving much amounts of lignin were used in order to study the influence of gamma irradiation.
The experimentals were carried out in the presence of air (dryed state), in the water, methanol, acetic anhydride, acetic anhydride+methanol, dioxane, dimethyl sulfoxide and 1% NaOH solution as deaerated as possible from each solutions. The irradiation was for 100 hours at the temperature of 2021°C. Total irradiation dose was 1.47 × 107 R.
The yields, lignin content, 1 % NaOH solubility, and then brightness were determined. In the case of acetic anhydride and the mixing solution of acetic anhydride and methanol the degree of acetylation also was determined.
The following results were obtained from the above-mentioned experiments.
1) Yield and analytical value
In the case of dimethyl sulfoxide which is a good solubilizer for pulp as well as especially in the case of 1% NaOH solution, the yield decreased by the irradiation.
It was found that this phenomenon was denoted remarkably for the cold soda pulp.
2) For the pulp immersed in the water the brightness of pulp was not pratically improved by the irradiation, but relatively remarkably improved for immersing in methanol. Thus phenomenon was observed in both DP and the cold soda pulp. The improvement of the degree of brightness is not the change in quality of lignin, but it may be considered reasonably to take place by the action of oxidizing bleach with a smaller amount of oxygen of air remaining in the material. And also by comparison with immersing in water, it is considered for immersing in methanol that the action of bleaching arises from the presence of an extremely small amount of oxygen. Additionally, 1% NaOH solubility gets a small value in the both systems. Therefore, it may be considered that the degree of brightness is improved by the oxidation reaction, but the degradation degree of pulp gives a small value.
3) From the scope of results obtained by the infrared analysis. it seems most reasonable to conclude that methanol does not react with lignin in the cold soda pulp even on irradiating.
4) In practice, it was found that the acetylation was accelerated by the gamma-rays irradiation.抄録全体を表示PDF形式でダウンロード (809K) -
1979 年 33 巻 8 号 p. Preface1
発行日: 1979/08/01
公開日: 2009/11/10
ジャーナル フリーPDF形式でダウンロード (167K)
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