繊維の圧縮特性に関する研究 : (第 14 報)単独繊維塊の履歴における温度依存性(外圧∿空隙率線図)

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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. Where, the author used trial manufactured apparatus for this experiment. This trial manufactured apparatus is introduced in previous thesis, Part twelve. And this trial manufactured apparatus is Japanese Patent Number 486847. The author searched for relation among the many important factors. As these important factors, pressure P (kg/cm^2), porosity percentage ε(%), critical porosity percentage in theory ε'(%), temperature T (℃) and number of times in the hysteresis through increasing and decreasing of pressure N (no.) is taken into the consideration. The range of pressure P is from 0 (kg/cm^2) to 5 (kg/cm^2) through increasing and decreasing of pressure. 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. The number of times in the hysteresis of increasing and decreasing of pressure adopted case of from the first time to fifth number of time in the hysteresis. As the first step, range of temperature set within the limits from 10℃ to 80℃. The experiment of behaviour of temperature dependence was tried by each step of 10℃ of temperature. Before the experiment, the author made control of fibre's weight into the gum ball, hand carding of single fibre's lump and moisture regain into each single 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 critical porosity percentage in theory ε'(%). These factors is made by ten factors : Wt (g), total weight (substituted by water) : Vt (cm^3), total volume (substituted by water) : Wr (g), weight of gum ball : {Wr+Wf} (g), weight of {(gum ball)+(fibre)} : Wf (g), weight of fibre : Vr (cm^3), volume of gum : Vo (cm^3), volume of fibre under the pressure P=0 (kg/cm^2) : Vf=Wf/σf (cm^3), real volume of fibre : T (℃), temperature of water at the moment : σw/t (g/cm^3), the specific gravity of water under the temperature at the moment : 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 relative curve is a relative curve under five number of times in the hysteresis through increasing and decreasing of pressure. And this is a relative curve in that time of each step from 10℃ to 80℃ in temperature through the several kinds of test piece. Here, the test piece is Viscose Rayon, Nylon and Beslon under the same denier, 3 deniers of fineness. 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 C, Nylon N and Beslon B. The author hope the reader that will understand the general tendency from this drawing of the development tendency of temperature and difference of porosity percentage. And this tendency shows a very interesting tendency. Also, this trial manufactured apparatus which used in this experiment is a convenient to repeat the measurement. The results in this experiment is reported after careful consideration by the author and research professor P. Grosberg of the university of Leeds in England. And the author found that these investigated results in this experiment had not contradictory points. Thus, these experimental results which were obtained in the way described above proved the rationality.
金城学院大学の論文
1981-02-28

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 14 報)単独繊維塊の履歴における温度依存性(外圧∿空隙率線図)

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