巻号一覧
13 巻, 1 号
選択された号の論文の13件中1～13を表示しています
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清水 勤二1957 年 13 巻 1 号 p. 2-5
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (391K) -
第2報 P. V. Cの熱分解に対するイリホロンの挙動室井 正, 江村 幸彦, 瀬沼 正男1957 年 13 巻 1 号 p. 6-9
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーThe change of properties of heat-treated P. V. C. by the addition of different agents, of which isophorone improved heat stability of P. V. C. has been studied by adding isophorone, it was found;
1) Amount of generated HCI from heat-treated P. V. C. was decreased,
2) Heat decomposition of the P. V. C. was suppressed.
Viscosity of the heat-treated P. V. C. by the addition of isophorone was found same to the original heat-treated P. V. C. whereas the one at nitrobenzene was very much changed. Furthermore no decomposed matter and no crosslinked P. V. C. was produced in case of isophorone.抄録全体を表示PDF形式でダウンロード (296K) -
第3報 イソホロンのP. V. C熱分解抑制機構について室井 正, 江村 幸彦, 瀬沼 正男1957 年 13 巻 1 号 p. 9-12,6
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーFrom the amount of generated HCl, extinction coefficient at visible light, etc., we studied the effect of isophorone against the properties of heat-treated P. V. C. As the result, it was found that the thermal stabilization of heat-treated P. V. C. is based on the conjugated double-bond of the isophorone.抄録全体を表示PDF形式でダウンロード (339K) -
第1報 硫酸ならびに過塩素酸触媒による酢化桜田 一郎, 坂口 康義1957 年 13 巻 1 号 p. 13-16
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーBleached cotton was immersed in an aqueous solution of sulfuric or perchloric acid, excess solution was pressed out, air dried to the desired degree and then brought into contact with acetic anhydride vapor at 30_??_60°C for the acetylation. In contrast to the acetylation of rayon various organic liquids such as lower alcohols and esters may be employed instead of water for the pretreatment successfully. Acetylation proceeds smoothly even when the water content of the fiber is as low as 10%. These observations indicate that liquids penetrate easier into cotton fiber than into rayon. But under such conditions that acetylation of both cotton and rayon proceeds smoothly, the acetylation rate of the latter is greater.抄録全体を表示PDF形式でダウンロード (355K) -
第3報 反応の経過について(その2)岩倉 義男, 上田 一郎1957 年 13 巻 1 号 p. 17-20
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーWe have found in the previous paper that, when the viscose rayon containing the aquous solution of inorganic salts was acetylated by ketene, the water was converted predominantly into acetic anhydride and the cellulose began to be acetylated. Applying this finding the fiber which contained acetic anhydride and inorganic salts in the swelling state was first prepared, and then the fiber was allowed to react with ketene at various temperatures, and the aspect of the acetylation was observed.
It was found that the reaction of the acetylation was affected by the microscopic structure of fiber, and the acetylation rate agreed with the first order equation of reaction only at the initial stage of reaction.
The same tendency was also found when excess acetic anhydride vapour existed from the first in the reaction system, and as the temperature of reaction was raised, the acetylation rate agreed with the first order equation of reaction over a wide range.抄録全体を表示PDF形式でダウンロード (313K) -
第4報 酢化繊維の性質について岩倉 義男, 滝川 昌彦, 上田 一郎1957 年 13 巻 1 号 p. 20-23,17
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーThe physical properties of the acetate rayon acetylated in fiber state by ketene were tested, especially on denier, degree of polymerization, tenacity and elongation. As the result of testing, judging from the ratio of the increase in denier accompanied by the increase in the degree of acetylation, it was observed that the shrinkage of fiber had occured.
The degree of polymerization degraded to some degree at the initial stage of the reaction, namely, until the acetic acid value had reached about 20%, but thereafter it degraded only slightly up to the cellulose diacetate.
It was found that the tenacity and elongation of the acetylated fiber, when its acetic acid value is about 25%, are particularly unsuitable for the practical fiber.抄録全体を表示PDF形式でダウンロード (321K) -
第1報 尿素,リン酸によるリン酸繊維素の製造勝浦 嘉久次, 野中 茂男1957 年 13 巻 1 号 p. 24-28
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーThe brief procedure for preparation of cellulose phosphate by the urea-phosphoric acid had been described by S. Coppick, but no detailed report had been published. The influence of the molar ratio of urea and phosphoric acid, the degree of compression, temperature and duration of preliminary drying on the phosphorylation of cellulose were studied. There were optimum molar ratio between them for obtaining highly phosphorylated cellulose. When the molar ratio is constant, the sample prepared under the condition of higher temperature and shorter duration of reaction showed less degradation and higher reactivity. As a whole, the rate of main reaction occured was very small, and by repeating the reaction 3 times the sample containing only 9.03% phosphorous could be obtained. All samples obtained were insoluble in water and dil. NaOH aq., and were fibrous. As a result of high frequency titration, all phosphate radicals were known to be in the form of two basic ester and the existence of bridge linkage could not he recognized.抄録全体を表示PDF形式でダウンロード (421K) -
第2報 リン酸繊維素の熱安定性勝浦 嘉久次1957 年 13 巻 1 号 p. 28-30,24
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーThe flameproofing phenomena of cellulose phosphate were analyzed by the thermal balance and the results obtained were as follows:
(I) The curves plotting weight loss vs. heating temperature about ammonium cellulose phosphate (1) were very different from the case of cellulose linter (2). The decomposition of (1) began at lower temperature than (2), but the continued decomposition curve of (1) increased more slowly than (2). It was almost impossible to prevent charring of cellulose fibre when it was directly exposed to flame, but the presence of phosphate radicals could prevent further burning after the fibre was withdrawn from the flame. It was recognized that the larger the degree of esterification, the larger the thermal stability.
(II) The thermal stability of cellulose phosphates depends upon their polymerization degree. When the degree of esterification is nearly equal, the sample possesed higher molecular weight is superior in thermal stability, and this state is obtainable at higher temperature and shorter duration of reaction.
(III) The ammonium salt and natrium salt of cellulose phosphates were very different from each other in weight loss curve, and it could be concluded that the former is better flameproofing than the latter.抄録全体を表示PDF形式でダウンロード (315K) -
第3報 綿スフ混紡率が混紡むら及び糸むらに及ぼす影響上野 清一郎1957 年 13 巻 1 号 p. 31-34
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーIn order to suppliment the previous report the blended yarns of cotton and rayon s. f. with each different length have been produced. The results obtained are as follows:
(1) As regards interaction, the difference of fibre denier in any different fibre length and the difference of fibre length in similar fibre denier have greater influence independent of the kind of fibres.
(2) Both the yarn evenness and the blend irregularity are greater for two different lengths of component fibres than for same lengths, but the causes of both irregularities do not necessarily coincide.抄録全体を表示PDF形式でダウンロード (309K) -
繊維の捩り弾性余効に関する研究(第2報)大沢 源一郎1957 年 13 巻 1 号 p. 35-41
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーThe torsional angle of the fibre being twisted by the constant moment increases with the elapsed time (Torsional Creep), and decreases after removing the twisting moment as an elastic afte-effect (Torsional Recovery). The torsional creep and recovery are measured with the filament of raw silk and drawn nylon. These phenomena show the typical curves similar to the tensile creep and recovery. The instantaneous, initial twist at constant moment is followed by the creep-twist. The maximum twist attained after creep has to be reduced to the set twist for equilibrium. Considering the torsional recovery the total twist is divided into three parts; the elastic twist, the twist of retarded elasticity and the plastic twist, from which the degree of torsional elasticity and plasticity etc. are estimated. The torsional recovery of drawn nylon by simple twisting is greater than that of raw silk. Generally the torsional plasticity of fibre increases with the given twist and saturates. The number of turns T per unit length as the function of elapsed time t is represented: T=A1±B1, logt, T=A1•t±b1 or T=A0±B0 log(t+α) etc. The coefficients depend upon a given twisting moment M the plus sign corresponding to the creep, minus to the recovery. A1 and A0 are dependent on the M-T relation of the specimen, B1∞M below a certain moment, and b1 ∞1/M approximately. This study shows that the naturally stable twist of fibre changes with the time according to the above formula of the recovery of torsional deformation.抄録全体を表示PDF形式でダウンロード (466K) -
第2報 トラバース比よりみた巻量について久世 栄一, 酒井 哲也1957 年 13 巻 1 号 p. 42-45
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーFindings ob theoretical and experimental researches on the cop forming are reported.
The relation between the number of the traverse i and the radius of the cop r are expressed by the following equation; where k: speed ratio between the traverse motion and the spindle revolution r0: radius of the pirn h: length of the traverse a: experimental constant From this equation the following linear form may be obtained; By determining a experimentaly, the apparent specific gravity of the cop can be erpressed by the equation; where, ρν: weight of the unit length of yarns α, β: experimental constant.
Then if k takes a larger value ρ becomes larger too, but the influence of k to ρ varies due to various properties of yarns and its degree may be characterized by the ratio β/α.抄録全体を表示PDF形式でダウンロード (279K) -
内田 豊作, 沼野 康政, 富塚 勝重1957 年 13 巻 1 号 p. 46-50
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーResistance to abrasion of fifty kinds of woven fabrics were tested by U-M fabric abrasion tester, in dry and wet conditions applying respectively the same specimens in both conditions. Those specimens were made of various kinds of raw materials and also differed in texture, states of yarns used, strength, elasticity, thickness, density, etc.
It was found that the resistance to abrasion of the same fabric were generally lower in wet condition than in dry. And the reason of this result seemed mainly due to the facts that:
(1) Tensile strength, of the constituent fibers are generally weakend in wet condition.
(2) The frictional resistance to slippage of the fibers are also weakened by presence of water between them.
The relation between log (load value) and log (number of revolution of the abradant ring to the end point) were also linear simular to the relation previously reported on dry tests.抄録全体を表示PDF形式でダウンロード (452K) -
小田 実1957 年 13 巻 1 号 p. 51-55
発行日: 1957/01/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (364K)
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