繊維の圧縮測定に関する研究(第 2 報)圧縮性並びに圧縮弾性に於ける履歴現象に就て

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1) Purpose The purpose of the experiment in this paper is to improve trial manufactured equipment in Part I of this thesis (Kaseigaku-kiy), No. 2,1962,pp. 11-21), examine and approve this improved equipment and make clear hysteresis phenomenon in compressibility and compressional resilience with the aid of this improved equipment (trial manufactured equipment in this paper). 2) Procedure The regulator of pressure had been fitted between compressure gauge. The apparatus in this paper is devised in such a way that a strong gum ball stuffed with fibre may be dipped under the water in the tight-closed steel tank. a) This experiment is tried under the pressure from 0kg/cm^2 to 5kg/cm^2 at the each stages of the increase and decrease in pressure. b) As the test pieces, Nylon (1.5 deniers-20 deniers, 44mm-83mm), Viscose Rayon (1.5 deniers-5 deniers, 38mm-51mm), Pylen (1.5 deniers-3 deniers, 38mm-76mm), Urylon (3 deniers-5 deniers, 51mm-63mm), Tetolon (1.5 deniers-6 deniers, 38mm-70mm), Beslon (3 deniers-7 deniers, 55mm) and Alon (2 deniers-3 deniers, 51mm-70mm) have been used. Thease fibres is not straight filament, but crimped fibre. c) The tester examines the compressibility and compressional resilience of fibre by obtaining its porosity ε(%) under each stage of pressure P. Porosity ε(%) under pressure P is obtained, [numerical formula] Here V_p represents the volume of fibre under the pressure P at the moment : ΔV_p, discharged air quantity (ΔV_p=πr^2・l) : r, radius of capillary tube : V_f, real volume of fibre. d) In order to make clear this hysteresis phenomenon, 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. The author wishes to refer to the procedure section under clause abstract in Part I of this paper. 3) Results For each fibre and for each denier, pressure and porosity curve have been obtained. a) Result of experiment shows the general belief is right that comfortable spring-like touch is greater if the fibre is harsh and its fineness and Young's modulus is great. b) Fibre has by far the greater Young's modulus and resiliency than is generally believed. c) In spite of the critical porosity ε'(%) in theory, the fact remains that the ordinary state of fibre is far from being in complete contact, but it is only in point or partial contact. d) On account of fited the equipment of Part I in this paper with a regulator of pressure, it could expect correct measurment in the first stage of increase and decrease occasion of pressure. e) So long as enough times is given for the recovery, a wound of each fibres is little. Thus, this improved equipment (trial manufactured equipment in this paper) proves to be of more practical use, for the measure compressibility, compressional resilience and its hysteresis phenomenon of fibres.
金城学院大学の論文
1966-09-20

著者

寺島功
金城学院大学

繊維の圧縮測定に関する研究(第 2 報)圧縮性並びに圧縮弾性に於ける履歴現象に就て

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