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14 巻, 7 号
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岡村 誠三1960 年 14 巻 7 号 p. 422-425
発行日: 1960/07/10
公開日: 2009/11/17
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岩崎 博四1960 年 14 巻 7 号 p. 426-435
発行日: 1960/07/10
公開日: 2009/11/17
ジャーナル フリーVinylon for papermaking can be divided into two main grades ; relatively soluble PVA fiber for adhesive use and relatively insoluble PVA fiber or Vinylon for reinforcement use, and subject fiber use . When relatively soluble PVA fiber is dispersed into water with other fibers and sheets are formed, the fiber which has the dissolving temperature of about 60°C in water is useful as binder . When the relatively insoluble PVA fiber and Vinylon have the softening temperature of over 90°C in water, it improves the tear strength of paper and non-woven fabrics. The relatively insoluble PVA fiber has greater tenacity and elongation, in other words, toughness and the paper reinforced with it has greater tear strength. The strength of paper and non-woven fabrics are greatly and freely improved with the mixture of relatively soluble and insoluble PVA fiber or Vinylon with all kinds of fiber.抄録全体を表示PDF形式でダウンロード (2203K) -
渡辺 薫1960 年 14 巻 7 号 p. 436-444
発行日: 1960/07/10
公開日: 2009/11/17
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前松 陸郎, 塩月 亀若, 谷井 静男, 井原 庫逸1960 年 14 巻 7 号 p. 445-449
発行日: 1960/07/10
公開日: 2009/11/17
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(第5報) 誘電的性質に及ぼす多価陽イオンの影響武 祐一郎, 鈴木 豊, 松永 良助, 山河 良雄1960 年 14 巻 7 号 p. 450-454
発行日: 1960/07/10
公開日: 2009/11/17
ジャーナル フリーAs the salts of multi-valent cation, AlCl3 Al2 (SO4) 3 and Th (NO3) 4 were selected, and effects of these on dielectric properties of un-impregnated paper and oil impregnated paper were studied.
(1) In regard to the dielectric loss of un-impregnated paper at high temperature, all the papers treated with solutions of less concentration than 2.5 x10-4 N were more excellent than the papers washed once with cure water.
In the range of that concentration, the order of the dielectric loss at high temperature w as as follows : Th (NO3) 4> AlCL3> Al2 (SO4) 3, but in the concentration of more than 1 x 10-3N, the order was
AlCl3>Al2 (SO4) 3>Th (NO3) 4.
(2) In regard to the dielectric loss of oil impregnated paper at 100T. the order of dielectric loss was as follows : AlCl3>Al2 (SO4) 3>Th (NO3) 4.
But, only two samples, which were treated with dilute solution of Th (NO3) 4, showed better result than the paper washed with pore water.
(3) Effects of multi-valent cation on the dielectric loss at 20°C of oil impregnated paper could he ignored.
(4) When the effects of cations (from mono-Nalent to tetra-valent) used in this work were compared .AlCl3and Al2 (SO4) 3were excellent in the dielectric loss of un-impregnated paper, but in dielectric loss of oil impregnated paper, they were not so much excellent, and Pb (CH3COO) 2was best and Th (NO3) 4was corn paratively good.抄録全体を表示PDF形式でダウンロード (1018K) -
越沢 徳美1960 年 14 巻 7 号 p. 455-458,475
発行日: 1960/07/10
公開日: 2010/02/10
ジャーナル フリーKokoku Rayon and Pulp Co. Ltd., Research Division, 11 Shiba Tamura-cho, Minato-ku, Tokyo, Japan.
In a previous paper (J. Soc. Textile and Cellulose Ind., 14, 594 (1958)) the influence of other factors than the degree of polymerization as shown by Alf af Ekenstam (Svensk Papperstidn., 45, 81 (1942)) on the solubility of various kinds of cellulose into phosphoric acid was reported by the author.
In this paper, the dissolved part of cellulose (sulfite pulp, prehydrolyzed sulfate pulp and cotton linters) in phosphoric acid of various concentration was studied with regard to the average degree of polymerization, and the rates of hydrolysis in 70% phosphoric acid at 20°C. The rates of hydrolysis of the insoluble residues, swelled to various degrees were also determined. The results were as follows : -
The relations of average DP of dissolved part to the concentration of phosphoric acid are not the same in three samplesdissolving sulfite pulp, prehydrolyzed sulfate pulp and cotton linters. The fact may he ascribed to the factors such as lateral order other than the degree of polymerization.
The rate constant of hydrolysis of the dissolved part is almost the same in both case of wood cellulose and cotton linters. On the other hand, the rate of hydrolysis of insoluble residues for wood cellulose is higher than for cotton cellulose under the same condition and changes with the concentration of phosphoric acid before dilution to 70%, namely the rate of hydrolysis of insoluble residue depends on the degree of swelling in the solution.
From these it is concluded that the rate of inhomogeneous degradation of cellulose is greatly influenced by the molecular orientation.
These facts also make easy the test on s'k & lability of cellulose in phosphoric acid which is proposed by Heide (Faseiforsch u. Textil Techn., 3, 486 (1952)) or the test modified by the author (above cited) to determine the transparency or turbidity of the cellulose suspension in phosphoric acid because, on one hand, the swelled par t dissolves into the solution with the lapse of time because of the greater rate of hydrolysis, and, on the other hand, the insoluble residue such as the constricted part in ballonlike swelling remains unchanged even after a long time because of the lower rate of hydrolysis.抄録全体を表示PDF形式でダウンロード (1094K) -
(第1報) 亜硫酸パルプ廃液よりリグニンスルホン酸の抽出舘 勇, 林 晄, 小島 義一, 東辻 健1960 年 14 巻 7 号 p. 459-462
発行日: 1960/07/10
公開日: 2009/11/17
ジャーナル フリーRecently, it was found that ligninsulphonate of higher fatty amines were soluble in organic organic solvent and posibilities of extraction of ligninsulphonate from sulphite spent liquor (SSL) were suggested.
In this report, the isolation method of ligninsulphonate, which consisted of addition of dicyclohexylamine (DCHA) to sulphite spent liquor and extraction with butanol, was studied.
SSL was extracted after neutralization with calciumhydroxide and addition of DCHA, but the gelatinous precipitation occured between butanol layer and water layer and the yield of ligninsulphonate did not exceed 70%.
If sulphuric acid was added to SSL, resulting the removal of calcium from reaction phase with precipitationof calciumsulphate, extraction process became easy and yield was increased.
When used sulphuric acid was equivalent to calcium in SSL the best results were obtained, and DCHA had to be added more than equivalence to sulphonic residue in ligninsulphonate.
For example, when SSL containing equivalent sulphuric acid to calcium and 1.5 mol of DCHA per sulphonic residue was extracted 90%, E of ligninsulphonate was obtained and if 2.5 mol of DCHA was used about 98% of ligninsulphonate was obtained.
DCHA-ligninsulphonate in butanol solution was substituted to desirable ligninsulphonate with extraction of aqueous alkali solution.
The ligninsulphonate preparation thus obtained did not contain any carbohydrate and represented all ligninsulphonate in SSL.抄録全体を表示PDF形式でダウンロード (914K) -
合成纎維総合研究所1960 年 14 巻 7 号 p. 463-467
発行日: 1960/07/10
公開日: 2009/11/17
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前田 良平1960 年 14 巻 7 号 p. 468-475
発行日: 1960/07/10
公開日: 2009/11/17
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中崎 豊一郎1960 年 14 巻 7 号 p. 476-481
発行日: 1960/07/10
公開日: 2009/11/17
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