繊維の圧縮特性に関する研究 : (第 17 報)単独繊維塊の圧力と空隙率における温度依存性(負の温度領域)

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The purpose of the research in this paper is to make clear the behaviour of temperature dependence on the compressional behaviour of each single fibre's lump. Quantitative measurement of fibre is not easy to conduct chiefly because of its indifinite shape. The important condition required for the apparatus is ever to exactly record the changes of stress imposed on the fibre. Where, the author used trial manufactured apparatus for this experiment. This trial manufactured apparatus is introduced in a series of these theses, Part twelve. And this trial manufactured apparatus is Japanese Patent Number 486847. The author searched for relation among many important factors. As these important factors, pressure P (kg/cm^2), porosity percentage ε(%), percentage of critical porosity in theory ε'(%) and temperature T (℃) is taken into the consideration. The author will mention briefly the important factors among those. As a range of pressuse P is from O (kg/cm^2) to 5 (kg/cm^2) through increasing and decreasing pressure. As a range of temperature T adopted range of minus in temperature of celsius. As a first step, range of temperature set within the limits from 0℃ to-20℃. And the experiment of behaviour of temperature dependence was tried by steps of -5℃ of temperature each. As the single fibre's lump of the test piece in this experiment is the following. Namely, Viscose Rayon (Crimped Dull) 3 deniers x 76m/m, Nylon 3 deniers x 70m/m and Beslon 3 deniers x 55m/m have been used. The arrangement of all these single fibre's lump is case of non-parallel in direction of single fibre's arrangement. And as a number of times in the hysteresis of increasing and decreasing of pressure adopted case of the first time in the hysteresis. Before the experiment, the author made control of fibre's weight into the gum ball. Also, the author made control of carding of fibre's lump and moisture regain of each fibre's lump as a test piece in this experiment. Also, before the experiment the author must obtain these factors as a measuring value for calculating the porosity percentage ε (%) and percentage of critical porosity in theory ε'(%). These factors is made by ten factors. Namely, it is Wt (g), Vt (cm^3), Wr (g), {Wr+Wf} (g), Wf (g), Vr (cm^3), Vo (cm^3), Vf=Wf/σf (cm^3), T (℃) and σ M/t (g/cm^3). And these ten factors is shown in Table 2 of this paper. This experiment was performed in such a way that a strong gum ball stuffed with fibre may be dipped under the liquid of Methanol (Methyl Alcohol) CH_3OH[-94℃][66℃]in the tight-closed steel tank. Temperature of minus in range from zero degree of celsius to twenty degrees of celsius were made by means of handy cooler TRL-107SL Type. And temperature at the moment of liquid of Methanol in the tight-closed steel tank tried a slight regulation by means of electron refrigerator and heater of direct current hydroelectric resources 8-F Type. The results of these experiments of single fibre's lump was investigated through the relation that is made by the following each graph. Namely, this is a P∿ε curve. This is a relative curve between pressure P (kg/cm^2) and porosity percentage ε(%). And this is a relative curve in that time of each step from 0℃ to-20℃ in temperature through the test pieces. Here, the test piece is Viscose Rayon (Crimped Dull), Nylon and Beslon of same fineness of 3 deniers. Further, this graph is a drawing of the development tendency between temperature T℃ and difference of porosity percentage ε_D (%) in that time of pressure P=0 (kg/cm^2) and 5 (kg/cm^2) through the test pieces, Viscose Rayon, Nylon and Beslon. The author hope the reader will understand the general tendency between T℃ and ε_D (%) from this graph. Fibre has by far the greater Young's modulus and resiliency than is generally believed in the range of minus in temperature. In spite of the theoretical critical porosity percentage ε' (%), the fact remains that the ordinary state of fibre is far from bei
金城学院大学の論文
1984-03-20

著者

寺島功
金城学院大学

繊維の圧縮特性に関する研究 : (第 17 報)単独繊維塊の圧力と空隙率における温度依存性(負の温度領域)

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