繊維の圧縮測定に関する研究 : (第 4 報)繊維塊の外圧∿体積歪線図について

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1) Purpose The purpose of the experiment in this paper is to make clear the relation between pressure and strain of volume, examine its hysteresis phenomenon in compressibility and compressional resilience of every kind's fibres by the aid of improved equipment, trial manufactured equipment in a series of this paper, registered as Patent Number 486847 in Japan Patent Office. 2) Procedure On the apparatus which used in experiment of this paper, I will make reference to Part II in a series of this thesis, Kaseigakutokushu, NO.6,1966,PP. 1-21. a) This experiment is tried under the pressure from 0 (kg/cm^2) to 5 (kg/cm^2) at the each stages of the increase and decrease in pressure. The each stages of pressure is 0,0.05,0.l, 0.2,0.3,0.4,0.5,0.6,0.7,0.8,1.0,1.5,2.0,2.5,3.0,3.5,4.0,4.5 and 5.0 (kg/cm^2). The author concentrated special attention on the increase and decrease of pressure from 0 (kg/cm^2) to 0.05 (kg/cm^2). It is not altogether without reason. Because, the movements of the column of mercury into the capillary tube under the limits of pressure from 0 (kg/cm^2) to 0.05 (kg/cm^2) is highest speed. b) As the test pieces, Nylon (1.5d.×44m/m, 3d.×70m/m, 10d.×76m/m, 20d.×83m/m), Viscose Rayon(1.5d.×38m/m, 3d.×57m/m, 5d.×51m/m), Pylen(1.5d.×38m/m, 2d.×51m/m, 3d.×76m/m), Urylon (3d.×63m/m, 5d.×51m/m), Tetoron (1.5d.×38m/m, 3d.×70m/m, 6d.×51m/m), Beslon (3d.×55m/m, 5d.×55m/m, 7d.×55m/m) and Alon (2d.×5lm/m, 3d.×70m/m) have been used. All of thease fibres is not straight filament, but crimped fibre. c) The tester examines the compressibility, compressional resilience and its hysteresis phenomenon of several fibres by obtaining its strain of volume Ev.p (%) under each stage of pressure P. Strain of volume Ev. p (%) under pressure P is obtained, Ev.p (%)=(ΔVp)/(Vo)×100 (%) but, ΔVp (cm^3)=πr^2・l (cm^3) Here ΔVp (cm^3) represents discharged air quantity under the pressure P (kg/cm^2) at the moment : r (m/m), radius of hole of capillary tube : l (cm), displaced length of column of mercury into the capillary tube : Vo (cm^3), volume of fibre under the pressure P=0 (kg/cm^2) at the moment. The value of Vo (cm^3) is found out than the value of total weight Ww (g) (substituted by water), total volume Vw (cm^3) (substituted by water), weight of gum-ball Wr (g), weight of gum and fibre (Wr+Wf)g, weight of fibre Wf (g), volume of gum Vr(cm^3), real volume of fibre Vf=Wf/σf (cm^3), temperature of water Tw (℃) and the specific gravity of water under the temperature at the moment σw (g/cm^3). d) In order to make clear this hysteresis phenomenon of strain of volume, the number of times of repetition is five times running in this experiment. e) Before the experiment, special care taken to the regulate and arrangement the test pieces used. f) The special care taken to the pressure P (kg/cm^2) ∿ strain of volume (%) curve. for recovery from case of I-repeat to case of V-repeats and for recovery from case of pressure 0 (kg/cm^2) to case of stationary, for recovery under each stage of pressure P. The author wishes to refer to the procedure section under clause abstract in Part I and II of thesis of this series. 3) Results For each fibre, for each denier and for the number of times from the first time to the fifth time in increasing and decreasing pressure, pressure P (kg/cm^2) ∿ strain of volume Ev.p (%) curve have been obtained, which result in : a) On the all fibres of seven kinds which used to this experiment, strain of volume is greater if the denier of fibres is great. b) In the repetition from the first time to the fifth times of pressure from 0 (kg/cm^2) to 5 (kg/cm^2), the strain of volume is greater if the number of times of repetition is increase. c) The strain of volume is great, this fact of clause a) and b) means little of porosity in Part I and II of this paper, namely : comfortable spring-like touch is greater. d) On the property of recovery from decreasing pressure (namely : pressure P=0kg/cm^2) to
金城学院大学の論文
1969-12-25

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寺島功
金城学院大学

繊維の圧縮測定に関する研究 : (第 4 報)繊維塊の外圧∿体積歪線図について

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