繊維学会誌
Online ISSN : 1884-2259
Print ISSN : 0037-9875
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59 巻, 1 号
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  • Comparing the Characteristics of 3D Torso Surface Curvatures between Young Men and Women
    Tomoe Masuda, Haruki Imaoka
    原稿種別: scientific monograph
    専門分野: Infomation Science
    2003 年 59 巻 1 号 p. 1-11
    発行日: 2003年
    公開日: 2003/12/31
    DOIhttps://doi.org/10.2115/fiber.59.1
    ジャーナル フリー
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    The characteristics of body surfaces are statistically compared between young men and young women in terms of two ‘ curvature’ measures; one (called Concentrated Gaussian Curvature) is defined as a substitute for Gaussian curvature and the other (called Concentrated Geodesic Curvature) as that for geodesic curvature. These two measures are evaluated on the vertices of the triangular-mesh, which simulates a three-dimensional torso surface. The sum of these ‘curvatures’ totaled over all vertices of the mesh satisfy a topological conservation law induced from the Gauss-Bonnet theorem, irrespective of any metric characteristics of the torso. This is, therefore, a good measure which enables us to extract, with no bias due to difference in body size, how males differ from females in body shape. The results obtained in the present work suggest a novel viewpoint in clothing-pattern making.
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  • A 3D Biomechanical Model for Numerical Simulation of Dynamic Mechanical Interactions of Bra and Breast during Wear
    Y Li, X Zhang, K.W Yeung
    原稿種別: scientific monograph
    専門分野: Infomation Science
    2003 年 59 巻 1 号 p. 12-21
    発行日: 2003年
    公開日: 2003/12/31
    DOIhttps://doi.org/10.2115/fiber.59.12
    ジャーナル フリー
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    This paper presents a 3D biomechanical model of a female body, which consists of elastic breast and rigid body on the basis of analyzing the biomechanical characteristics of human body. Bra is regarded as material linearity and geometric non-linearity. The contact between human body and bra is modeled as dynamic sliding interface based on the theory of contact mechanics. Finite element method is used in the time domain for deriving numerical solution of the dynamic contact problem. An example is presented to illustrate the simulation results of the computational model: a female human model is walking at a constant speed when wearing a bra. The computational model can simulate and characterize the dynamical mechanical behavior of the breast and bra during the body movement with the breast falling and bouncing in terms of bra deformation, pressure and stress distributions and breast stress distributions. Comparing with the quantity of measured garment pressure reported in the literature, the predicted pressure is close to the magnitude of experimental measurements, indicating that the model is able to simulate bra pressure during wear with reasonable accuracy.
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  • Bellows action (ふいご作用) の着衣の放熱性能への影響 -第2報　開口部の開口条件の効果-
    薩本 弥生, 伊藤 幸子, 長谷部 ヤエ, 竹内 正顯
    原稿種別: 研究論文
    専門分野: 情報学
    2003 年 59 巻 1 号 p. 22-29
    発行日: 2003年
    公開日: 2003/12/31
    DOIhttps://doi.org/10.2115/fiber.59.22
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    To study the effect of bellows action on heat transfer in clothing system, experiments were done by using a simulated skin (hot plate) and a clothing-material plate which was shuttled up and down over a hot plate to simulate a bellows action of clothing. In part 1, it was found that the effect of air permeability was small. The effect of bellows action on heat transfer has been expected being affected by the number of openings, which is one of the constructive factors. The number of opening was three patterns, 0, 1, and 2. We named each Model Model(0), Model(1), and Model(2) respectively after it's opening number. In comparison Model(1) with Model(2), the effect of bellows action from opening position to middle position of Model(1) was larger than that of Model(2). A simple theoretical analysis was made to explain the heat transfer phenomena in clothing during bellows action. It was found that the nearer the distance from opening was, the larger the magnitude of velocity and thus effect of bellows action was. The velocity near entrance of Model (1) was about twice as fast as that of Model (2). It was the reason that the effect of bellows action of Model (l) was larger than that of Model (2) around the opening position.
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技術報文
  • 各種粉砕方法による羊毛繊維の粉末化とその形状
    上甲 恭平
    原稿種別: 研究論文
    専門分野: 情報学
    2003 年 59 巻 1 号 p. 30-34
    発行日: 2003年
    公開日: 2003/12/31
    DOIhttps://doi.org/10.2115/fiber.59.30
    ジャーナル フリー
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    The unmodified and prechemically treated wool fibers were ground, crushed and pulverized in dry and wet state by the different mechanically methods. The fractured products with the different shapes and sizes could be produced. Two kinds of powder; the fine powder of less than 10 μm (top size) and spindle shape particles consist of cortical cells, were finally obtained by several combinations of grinding, crush and pulverization method. The differences in the shape and size of these particles are essentially dependent on both the mechanical mechanism of the used laboratory apparatus and the chemical/physical structure of wool fiber induced by the different pre-treatments.
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  • 羊毛の酵素処理における界面活性剤前処理の酵素反応促進効果
    吉村 由利香, 大江 猛, 安倍 郁夫, 澤田 和也
    原稿種別: 研究論文
    専門分野: 情報学
    2003 年 59 巻 1 号 p. 35-39
    発行日: 2003年
    公開日: 2003/12/31
    DOIhttps://doi.org/10.2115/fiber.59.35
    ジャーナル フリー
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    In order to develop new shrink-resistance finishing by using enzyme, the promoting effect of surfactants on enzyme treatment of wool was studied. Wool fabric was pretreated with anionic surfactants. This pretreatment accelerates the following enzyme treatment remarkably, and high weight loss values over 30% were obtained within 3hours. The typical anionic surfactants, fatty acid sodium salts and sodium dodecyl sulfate (SDS) show the different promoting effects, respectively. Oleic acid sodium salt works in the center of wool fiber, and hydrolyzes the cell membrane complex in cortex. The other hand, SDS works in the scale on the wool surface. The SDS depresses the fibrillation of wool fiber and improves fiber strength.
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ノート
  • オゾン－酸素存在下での紫外線照射によるポリ乳酸繊維の酸化分解挙動
    久保川 博夫, 篠原 正人, 茂木 貴美代, 中村 敬
    原稿種別: 研究論文
    専門分野: 情報学
    2003 年 59 巻 1 号 p. 40-43
    発行日: 2003年
    公開日: 2003/12/31
    DOIhttps://doi.org/10.2115/fiber.59.40
    ジャーナル フリー
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    The oxidative decomposition of polylactide fabrics irradiated with ultraviolet light in an ozone-oxygen atmosphere was investigated. The tensile strength of irradiated yarn remained almost constant up to 70 s of irradiation time, but it decreased steeply in the range of 70 to 300 s and did slowly above 600 s. The elongation discontinuously decreased in the range of 300 to 600 s, because the cold drawing did not occurred in the region of more than 600 s. In the DSC heating curves of irradiated fabrics, the double melting behavior remarkably changed in shape above 150 s and the peak temperatures shifted to the low-temperature side with increasing irradiation time. This result suggested that the melting-recrystallization-remelting behavior had changed since tie molecules had been decomposed. The enthalpy data of melting proved that the crystallites of samples irradiated for more than 600 s had been partially destroyed. When the carboxylic groups were analyzed by absorption of basic dye molecules on the sample surfaces, it was suggested that the oxidative decomposition is retarded on the surface of polylactide fiber.
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