巻号一覧
68 巻, 2 号
選択された号の論文の8件中1～8を表示しています
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繊維と工業
時評
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宝田 亘2012 年 68 巻 2 号 p. P_41
発行日: 2012年
公開日: 2012/03/24
ジャーナル 認証ありPDF形式でダウンロード (201K)
解説
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－21世紀における新たな潮流を展望する－望月 政嗣2012 年 68 巻 2 号 p. P_42-P_54
発行日: 2012年
公開日: 2012/03/24
ジャーナル 認証ありPDF形式でダウンロード (1406K)
最近の博士論文から
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赤田 昌倫2012 年 68 巻 2 号 p. P_55-P_58
発行日: 2012年
公開日: 2012/03/24
ジャーナル 認証ありPDF形式でダウンロード (1387K)
連載
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東垣 真理子2012 年 68 巻 2 号 p. P_59-P_62
発行日: 2012年
公開日: 2012/03/24
ジャーナル 認証ありPDF形式でダウンロード (7101K)
報文
一般報文
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後藤 景子, 安川 あけみ, 小林 靖之2012 年 68 巻 2 号 p. 19-26
発行日: 2012年
公開日: 2012/03/24
ジャーナル フリーPoly (ethylene terephthalate), PET, fibrous assembly was treated by atmospheric pressure plasma (APP) jet with three different reactive gas sources, air, nitrogen and argon. The change in the wettability of single fiber surface due to the treatment was determined by the wetting force measurement with moving the fiber/water/air three-phase boundary. Both advancing and receding contact angles of water on the PET fiber decreased considerably by the APP treatment, even if the hydrophobic recovery of the treated fiber surface after the aging in air and rinsing with water was taken into consideration. The contact angles on a treated single fiber surface showed periodic variation along the fiber axis, indicating that the fiber surfaces were not treated uniformly because of fiber crimps due to the structure of the fibrous assembly. The water wicking into the capillaries of the fibrous assembly was promoted after the APP treatment, in good agreement with single fiber wettability. From X-ray photoelectron spectroscopy and atomic force microscopy, the oxygen concentration and the roughness on the PET fiber surface were found to enhance after the APP treatment. The above changes in the surface properties of a single fiber were remarkable for using nitrogen as a reactive gas.抄録全体を表示PDF形式でダウンロード (1252K) -
西本 博之, 大谷 章夫, 仲井 朝美2012 年 68 巻 2 号 p. 27-32
発行日: 2012年
公開日: 2012/03/24
ジャーナル フリーAn advantage of braided composites is that the fiber bundle orientation angle, called the ″braiding angle,″ can be changed, because the braiding angle affects the mechanical properties. Control of the angle is an important means of adjusting the stiffness distribution as required. However, when the braiding angle is changing from an initial braiding angle to a targeted braiding angle designated by the longitudinal velocity of the mandrel, some delay occurs before the actual braiding angle reaches the targeted braiding angle. The delay is caused by movement of ″creating point″ which is defined as a fell-down point with the braiding yarn on the mandrel. After the creating point reaches the targeted point, the braiding angle will be constant. In order to obtain the temporal change in braiding angle under unsteady-state conditions, this paper presents a step response model in braiding angle on a cylindrical braided fabric. The mechanism in the temporal change is simple. Velocity of the creating point is in proportion to distance between the current creating point and the steady-state creating point designated as the targeted angle. The solution can be described by a time constant, because the motion equation is the first-order of differential equation which is derived from geometrical position of a braiding yarn. Furthermore, the method is verified with the experimental data. As a consequence, the model has proved effective for predicting fiber orientation on a cylindrical braided preform under unsteady-state conditions.抄録全体を表示PDF形式でダウンロード (1839K) -
奥村 航, 長谷部 裕之, 木水 貢2012 年 68 巻 2 号 p. 33-41
発行日: 2012年
公開日: 2012/03/24
ジャーナル フリーPoly(phenylene sulfide) (PPS) multi-filaments were continuously drawn and annealed. The maximum values of birefringence, crystallinity, tensile strength and Young′s modulus in the drawn and annealed PPS filament were 249×10−3 ‚ 27%, 5.3 cN/dtex and 64 cN/dtex‚ respectively. The orientation-induced crystallization was observed at 150×10-3 of birefringence. The crystal orientation factor f′ was estimated by wide angle X-ray diffraction. The λnet was estimated by the strain shifting of true stress - true strain curve to the master curve. The orientation estimated by the λnet differed from that estimated by birefringence. The fiber structure development and the mechanical properties of resultant fibers were discussed in terms of orientation parameters, which were birefringence‚ network draw ratio (λnet) and crystal orientation factor (f′). The birefringence shows a good correlation with the Young’s modulus. On the other hand, λnet shows a good correlation with the tensile strength. The f′ shows good correlations with both Young′s modulus and tensile strength‚ however‚ they tend to saturate at high f′. The melting temperature of PPS changed from 280.1ºC to 288.7ºC with the increase of birefringence and λnet.抄録全体を表示PDF形式でダウンロード (2463K) -
Masahiro Mizuno, Yousuke Kamiya, Tomoka Katsuta, Naohisa Oshima, Kouic ...2012 年 68 巻 2 号 p. 42-47
発行日: 2012年
公開日: 2012/03/24
ジャーナル フリーThe acetic acid bacterium Gluconacetobacter xylinus synthesizes a unique cellulose molecule called bacterial cellulose (BC) as an extracellular polysaccharide. The cellulose ribbons of BC are very fine and form a three-dimensional knitted structure. To add properties to the surfaces of fabrics, we produced hybrid materials composed of BC and fabric by culturing G. xylinus with fabrics as scaffolds. Nine kinds of fabric were soaked in medium, and then G. xylinus was statically cultured with the fabric at 25ºC. After the cultivation, the fabrics were purified by alkaline treatment and press-dried. BC displayed greater affinity for cotton and viscose rayon than for wool, silk, nylon, polyester, and Kevlar® . The surfaces of all fabrics were uniformly coated with a BC sheet and became shiny. However, when viscose rayon was used and the fabric was inverted during the cultivation process, both surfaces were coated with the BC sheet. It is suggested that the G. xylinus cells adhered to the surface of the fabric and produced BC in the vicinity of the air-water interface. During the inversion, the cells entered the interior of the fabric, and the resultant BC sheets surrounded each fabric.抄録全体を表示PDF形式でダウンロード (1016K)
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