巻号一覧
31 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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松岡 茂夫, 内藤 伸彦1975 年 31 巻 11 号 p. P341-P350
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーPDF形式でダウンロード (1493K) -
尾上 正行1975 年 31 巻 11 号 p. P351-P359
発行日: 1975/11/10
公開日: 2008/11/28
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雀部 博之1975 年 31 巻 11 号 p. P360-P368
発行日: 1975/11/10
公開日: 2008/11/28
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近田 冨士雄, 黒崎 新也, 加藤 久明, 横井 輝之1975 年 31 巻 11 号 p. T495-T501
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーSeparating the sliver into small fiber assemblies is very important in open-end spinning. In this report, the relations between the sliver irregularity and the variation in the weight of separated fiber assemblies were investigated. The sliver having periodic irregularity were separated only by air suction without combing roller, and then the weight of separated fiber assemblies are detected and recorded continuously. The variation in the weight of fiber assemblies are statistically analysed.
The results obtained are as follows:
(1) By using the experimental apparatus, the size and the number of fiber assemblies flying with high speed can be measured sensitively.
(2) The thinner the input sliver becomes, the more easily the sliver is separated into smaller assemblies. (Fig. 4)
(3) In variation of separated fiber assemblies, both the random variation and the periodic variation are recognized, though the random variation is very small in the input sliver. When the sliver irregularity becomes large, the ratio of periodic variation to total variation increases. (Fig. 10)
(4) The crosscorrelation coefficient between the input sliver irregularity and the weight variation of separated fiber assembly is less than 0.5, and increases with sliver irregularity. (Fig. 12)抄録全体を表示PDF形式でダウンロード (467K) -
青谷 寛, 鈴木 三男1975 年 31 巻 11 号 p. T501-T508
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーThe establishment of the testing method of pilling tendency at the stage of staple fiber is necessary for the development of the anti-pilling acrylic fiber. A SF-pill-test has been proposed to be a useful method for this purpose in the previous report.
In this report various factors concerning to SF-pill tester are studied and detailed testing conditions are shown. Durability of abrasion cloth, pressure weight, emptiness and rotating time of the testing instrument are found to be the variable factors. As the effect of abrasion cloth is unstable at the initial stage, it is necessary to operate after about 5 times (5 minutes per a time) blank test, when it can be used for 20 times per a cloth.
Both of pressure weight and emptiness have an important effects on the results, so these conditions must be set up to be constant. Weight of fuzz caused by brushing and length of fuzz are the factors influenced by operation. The former can be controlled by the standardization of original data, and the latter must be chosen to be 5mm length.
On the other hand, the testing samples for SF-pill-tester are limited to those in which the fuzz can form constant number of pills. Accordingly, the sample with different denier or different type of crimp cannot be kinetically compared by using SF-pill-tester.抄録全体を表示PDF形式でダウンロード (480K) -
大矢 安久, 山本 雄三, 斉藤 安史, 木下 茂武1975 年 31 巻 11 号 p. T508-T517
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーA study was made of the morphological changes of the crystalline texture that occur when poly (ethylene terephthalate) films were stretched and thermally relaxed. X-ray diffraction, optical microscopy, electron microscopy and ethylamine-etching experiments were employed.
The micrographs of etching patterns (photo. 6) for various stretched films, indicate that a cellular structure of size in 10 micron order is composed of the smaller aggregates with a tendency to elongate parallel to the draw direction. The X-ray data (fig. 1, 2) show that the elongated aggregates may have some regions made from 25-50 Å straight-chain crystals.
From patterns of low angle X-ray scattering (fig. 3, 4) and electron micrograph (photo. 7) for the annealed films, however, it is evident that an extended cellular or banded structure, accompanied with the appearance of the striations perpendicular to the draw direction, consists of row alignment of the ball-like aggregates. Based on the wide and low angle X-ray data, it is suggested that the laminar structures (100Å) of folded-chain crystals (35-55Å) are oriented in the domains of aggregate upon heat treatment with the thermal contractions.抄録全体を表示PDF形式でダウンロード (4723K) -
小西 孝, 後藤 恭助, 黒川 昌孝1975 年 31 巻 11 号 p. T518-T523
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーContractive behavior in the direction of fiber axis of the doubly oriented nylon 6 monofilament by the compression perpendicular to the rolling plane was studied. In this study, the effect of annealing and compressing temperature for the samples were investigated.
As the compression ratio increases, the amount of contractive stress in the direction of fiber axis by the compression increased the samples at low crystallinity. The results of X-ray diffraction patterns of the samples indicated that the crystallinity of the sample was decreased by the compression at room temperature.
As the compressing temperature increases, the contractive stress of the samples in the direction of fiber compression of the samples increased. The results of X-ray diffraction patterns of the samples indicated that the crystallinity of the sample was decreased by the compression at room temperature. rapidly at above about 160°C. The results seem to be reasonable compared with the temperature ranges of the partial melting and αc, relaxation of nylon 6.
Annealing at temperatures above the temperature of compressing decreases the contractive stress in the direction of fiber axis of the samples.抄録全体を表示PDF形式でダウンロード (950K) -
矢吹 和之, 伊藤 弘, 太田 利彦1975 年 31 巻 11 号 p. T524-T530
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーTo clarify the origine of superior mechanical properties of poly (p-phenyleneterephthalamide) fiber, x-ray scattering and birefringence studies as well as crystal structure determination were made. The following results were obtained.
1) The unit cell was monoclinic with a=9.39Å, b=5.20Å, c=13.0Å (fiber axis) and γ=56.4°, in which two chemical repeating units were packed. The space group was C2h-5(P21/a). The calculated crystal density, 1.50g/cm was slightly higher than the observed value (1.43g/cm3).
2) The hydrogen-bonded sheets coincide with the (100) plane in which every amide group participated in the formation of hidrogen bond with the distance (N…0) of 3.0Å. The molecular chain conformation was given by rotating the benzene rings alternatively by 38° from the amide plane.
3) The fine structure consisting of many pillar-shaped micro-fibrills was deduced from the fact that only equatorial steak was observed in small angle x-ray scattering pattern and the mean diameter of about 70Å was given by analysis of Hosemann plot on the (100) plane.
4) The calculated birefringence of perfectly uniaxial oriented specimen was 0.415 which was less than the observed value of 0.475. From this fact and the absence of long period, the pillar-shaped micro-fibrill structure is considered to consist of extended molecular chains.抄録全体を表示PDF形式でダウンロード (1682K) -
多賀 透, 高橋 英男, 近土 隆1975 年 31 巻 11 号 p. T531-T535
発行日: 1975/11/10
公開日: 2008/11/28
ジャーナル フリーPolymerization of acrolein in wool fibers was carried out in vapor phase by using potassium persulfate as the initiator. The polyacroleins were isolated from wool fibers by a hydrochloric acid-digestion method. The structure of the polymer was examined by infrared spectroscopy. It appears that the structure is similar to that of the polyacrolein prepared by a usual radical polymerization. Amino acids were analysed for the wool fibers containing the polymer to assess changes in the keratin structure produced by the deposition of polymer. It was suggested that lysine and tyrosine side chains react with aldehyde group of polyacrolein to form a new crosslink. Stress-relaxation was measured at 20% extension at 20°C in the solution of 5% NaHSO3 as a reducing agent of the disulfid bonds. The remaining stress observed after 100 minutes in the fiber containing 56.7% of polyacrolein was about 80% of the initial stress, while in the native fiber, the stress decreased by the levels of about 20%. This result also supports the formation of new crosslinks being remained intact by the action of the reducing agnent.抄録全体を表示PDF形式でダウンロード (1108K)
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