巻号一覧
13 巻, 6 号
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阿部 孝次郎1957 年 13 巻 6 号 p. 355-359
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (523K) -
第8報 綿繊維の生長過程におけるリント中の還元糖について大野 泰雄, 佐藤 和雄1957 年 13 巻 6 号 p. 360-364
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーIn order to elucidate the mechanism of cellulose formation, it is necessary to make clear the chemical constituents in lint cell. As the first step, the reducing sugar and cellulose contents in lint cell during the gorwing process of cotton fiber were daily measured. For the measurement of reducing sugar, the modified Schaffer-Somogy's methord was adopted. The cotton variety used for this research was “Rikuchimen Kanno No.I”, a sort of upland cotton.
1) During the period of rapid cell wall elongation, (1 to 20 days after flowering) the reducing sugar component was high compared with the mass of the crude fiber, but progressively decreased during cell wall thickening, “secondary wall formation”, until maturity war complete. But cellulose was synthesized and deposited in lint on the same rate during secondary wall formation.
2) Qualitative tests of the reducing sugar in various stage of development showed the presence of glucose, fructose and pentoses.
3) The mechanism of carbohydrate metabolism in lint cell is not evident, but some discussion was made concerning the formation of cellulose from these experimental results.抄録全体を表示PDF形式でダウンロード (400K) -
第6報 綿糸の酢酸稀釈剤を含む浴による酢化桜田 一郎1957 年 13 巻 6 号 p. 365-367
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーInstead of benzene, acetic acid was used as a diluent and acetylated with acetic anhydride in the presence of sulfuric or perchloric acid catalyst. Generally, in comparison to acetylation with benzene diluent, the rate of the reaction is low and damage to fibers great.
By the acetylation of yarns which have previously been impregnated with the catalyst, it is observed that the catalysts dissolves out into the acetylation bath gradually so that the acetylation rate slows down.
When free sulfuric acid is used, the reaction rate is high and fibers with 30_??_40 mole substitution may be easily obtained.抄録全体を表示PDF形式でダウンロード (293K) -
第7報 酢化綿糸の性質桜田 一郎1957 年 13 巻 6 号 p. 367-370,365
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーCotton yarns were acetylated with acetic anhydride using sulfoacetic acid catalyst and benzene diluent. When they are acetylated under no tension they shrink and the shrinkage increases with increasing degree of acetylation. The highest shrinkage is about 20%. Homogeneity of dyeing properties is sufficient. When acetylation is carried out under appropriate conditions no serious loss of the ordinary and knot strength of yarns is to be observed. The chloroform solubility and the hygroscopicity of the acetylated yarns are less than that of yarns which are obtained by the vapor phase acetylation. It seems, that in the case of the liquid phase acetylation the amorphous parts are more preferably acetylated than in the latter case.抄録全体を表示PDF形式でダウンロード (427K) -
大川 禎三1957 年 13 巻 6 号 p. 371-373
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーKm value of cellulose nitrates in acetone is measured in relation to their degree of nitration and degree of polymerisation.
(1) Km value varies respectively with the degree of nitration and degree of polymerisation.
(2) Following relations hold for nitrogen content of about 13.8% N, which is obtained usually with nitration mixture containing HNO3-H3PO4-P2O5.
(a) DP below 600_??_η_??_=11×10-4•P, (c:g/l)
(b) DP 600_??_3000_??_η_??_=0.1+92×10-4•P, (c:g/l)
(3) DP-distribution curves of some linters and wood pulps calculated from Staudinger's equation and above formulas, (a) and (b) were compared. Curves of high DP region are respectively
different.抄録全体を表示PDF形式でダウンロード (189K) -
大川 禎三, 早乙 女和雄1957 年 13 巻 6 号 p. 374-380
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーBehaviour of poly-phosphoric acids in the nitrating mixture containing HNO3-H3PO4-P2O5 and their influence on the degree of nitration of cellulose nitrates were investigated.
(1) It is not proper to estimate H2O% in the P2O5-H2O-HNO3 mixtures simply based on P2O5+3H2O=2H3PO4
2) Composition of the mixed acids varies slowly owing to the production of poly-phosphoric acids and it requirs about 4 days to reach the equilibrium.
(3) Comparing the Dolmetsch's, Staudinger's and Mitchell's nitrating mixed acids for DP determination, Mitchell's is most preferable.抄録全体を表示PDF形式でダウンロード (483K) -
第1報 ベンズアルデハイドによる繊維状アセタール化中村 尚史1957 年 13 巻 6 号 p. 381-384
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーPolyvinyl alcohol fiber was acetalized with benzaldehyde, using methanol-water as a solvent for the latter.
Influence of the previous heat treatment of the fiber and the composition and the temperature of the acetalization bath were studied in detail.
Emulsion of benzaldehyde was also used for the acetalization. When the degree of acetalization was higher than 30mol%, the fibers were resistent in boiling water.抄録全体を表示PDF形式でダウンロード (330K) -
第2報 シクロヘキサノンによる繊維状アセタール化メタノール系における反応中村 尚史1957 年 13 巻 6 号 p. 384-387,381
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーInfluence of the catalyst, solvent and temperature on the fibrous acetalization of polyvinyl alcohol with cyclohexanone was studied. As cyclohexanone is insoluble in water, mixtures of water and methanol were used as a solvent. Degree of acetalization was higher when methanol concentration and temperature of reaction was low. But it was difficult to obtain higher degree of acetalization than 30mol%.
Boiling water resistence of the obtained fibers were not sufficient.抄録全体を表示PDF形式でダウンロード (415K) -
第1報 冷精製パルプの含有水分とアセチル化反応性角 祐一郎, 岡田 元1957 年 13 巻 6 号 p. 388-391
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーThe cold refined pulp purified with 10% NaOH solution was acetylated by modified Jayme's method, and the relationship between the moisture content and the reactivity of the pulp was studied. In the course of drying, the reactivity of the pulp remained very good so far as the moisture content of the pulp was more than 18_??_20%, but the reactivity dropped suddenly after the water content fell below 18%. Neverthless the inactive pulp, obtained by drying, recovered its activity when re-moistened and the water content became again more than 18_??_20%. Irrespective of the history of the process of drying, the cold refined pulp is can to be acetylated smoothly in so far as its moisture content at the time of acetylation is higher than 18_??_20%.
When a hydrophilic solvent with high boiling point was added to the cold refined pulp, it was possible to keep its high reactivity even after is was dried.抄録全体を表示PDF形式でダウンロード (334K) -
第XV報 不均一繊維集団の圧縮挙動池田 佐喜男, 岡島 三郎1957 年 13 巻 6 号 p. 392-398
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーA fibre bulk of completely uniform density can hardly be prepared as the sample for the compression-recovery test and this locally nonuniform packing affects more or less on its compressionrecovery behavior. So the authors considered the effect mathematically in the cases (1)_??_(3):
(1) Assuming there are many thin layers of density δ_??_ in a bulk, δ_??_ is constant throughout in each layer, but some layers have greater density than the others.
(2) Dividing the bulk into many thin pillars of density δ_??_, δ_??_ is constant throughout in each pillar but in some cases δ_??_ can be different.
(3) Combined cases (1) and (2).
The conclusion is as follows;
The compression-recovery of a fibre bulk can be expressed by an experimental relation;
t(p+c)β=k, whether the bulk is uniform or nonuniform. Here t is the specific thickness of the bulk under the pressure p; c, β and k are constants. When the bulk grows less uniform, t becomes smaller for the smaller pressures and becomes larger for the larger pressures. β remains constant throughout the changes although the value of c and k vary. These considerations are adeguate to explain the observed behavior satisfactory.抄録全体を表示PDF形式でダウンロード (531K) -
第11報 牽切スライバの引張リ強度木下 茂武1957 年 13 巻 6 号 p. 399-405
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーIn this paper, the load-elongation curves P (γ) and lateral contraction-elongation curves β(γ) due to tensile extension of direct draft cutting sliver of viscose rayon filaments are discussed. On the assumption of λ_??_1, x_??_1 in the model of double elasticity of fibre system, the following theoretiral formulae are derived;
On the other hand, the experimental results of load-elongation, lateral contraction relations for samples of sliver having variation of length L0 linear density k0, and bulk density _??_0 are expressed respectively by the formulae of second power of elongation γ. By the procedure of comparing observed values of coefficients of power of γ with above theoretical expression, the effects of fibre properties into Poison's ratio ∑0, Young's modules E0, breaking strength and breaking elongation of direct draft cutting sliver have been determined.抄録全体を表示PDF形式でダウンロード (575K) -
第5報 熱固定が防皺性におよぼす効果について安田 武1957 年 13 巻 6 号 p. 406-408
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーHeat setting was carried out under several different tensions on nylon textiles. The experiments showed that the crease resistance of nylon textiles is increased by heat setting.
Comparing several textiles with each other which had the same residual shrinkage after the treatment, it was found that the crease resistance increases with increased tension on the textiles while heated.抄録全体を表示PDF形式でダウンロード (246K) -
荻原 孝夫1957 年 13 巻 6 号 p. 409-414
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (431K) -
K. Ramaszéder1957 年 13 巻 6 号 p. 415-418
発行日: 1957/06/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (318K)
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