繊維の圧縮測定に関する研究 : (第 7 報)繊維並びにプラスチック発泡体に於ける温度依存性測定装置の試作改良について

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The purpose of the research in this paper is to manufacture for trial and improve measuring equipment, to make research on property of dependence for temperature in compressibility, compressional resilience and its hysteresis phenomenon of several fibres and plastic foams (cellular and non-cellular plastic). In order to make clear a property of dependence for temperature, the author designed a new apparatus, as improved equipment of apparatus in Part III of this series paper. Quantitative measurement of fibre is not easy to conduct chiefly because of its indefinite shape. This apparatus of trial manufacture and improvement (Temperature Dependence Tester) is designed by such a part with a compressor, regulator of pressure, pressure gauge, regulator of temperature of direct current hydroelectric resources 4-F (8-F) type, steel tank of increasing and decreasing pressure which is setting water jacket and cooling unit of eight pairs, a refrigeratory and a part of recording the movements of the column of mercury in the glass capillary tube for calculate changeable quantity of volume through increasing and decreasing pressure. This temperature dependence tester of trial manufacture and improvement is devised in such a way that a strong gum ball stuffed with several fibres and each plastie foams may be dipped under the solution of ethylene glycol HOCH_2CH_2OH in the tight-closed steel tank. Also, This apparatus is designed in such a way make clear property of temperature dependence for compressibility, compressional resilience and its hysteresis phenomenon, as a range of measuring temperature is within the limits of from +80 to -20℃. This equipment is manufactured for trial in such a way that temperature of ethylene glycol solution in the tight-closed steel tank is within the limits of from +80℃ to -20℃ by the aid of regulator of temperature of direct current hydroelectric resources 4-F (8-F) type. In order to degrade temperature of ethylene glycol solution, slender copper pipe to let pass water is winded round the steel tank. A regulating of temperature is done by the aid of heating and cooling electric current with water jacket and cooling unit of eight pairs which is setting round the steel tank. As become clear in the Figure I, all parts on the steel tank of increasing and decreasing pressure, water jacket and cooling unit of eight pairs, measuring valve of initial volume and feeling part the heat or the temperature is into the lagging box made of wood. This designing is to make heat insulation. This temperature dependence tester gives pressure into the tank by means of a compressor, and examines the stress of the several kind's fibres and plastic foams by measuring the quantity of air discharged through the pipe attached to the gum ball and slender copper pipe may be dipped under the water in the refrigeratory. This equipment records the movements of the column of mercury in the glass capillary tube. This is marked with the sign l. This tester examines the compressibility, compressional resilience and its hysteresis phenomenon of several kind's fibres and plastic foams by obtaining its porosity ε(%) and strain of volume E_<v・p>(%) under each stage of pressure P (kg/cm^2)and temperature T(℃). As the lagging material, mineral glass fibre (MGF) have been used. Porosity ε(%) and strain of volume E_<v・p>(%) under pressure P (kg/cm^2) and temperature T(℃) is obtained, ε(%)=(V_o-ΔV_p-V_f)/(V_o-ΔV_p)×100 (%)=(V_p-V_f)/V_p×100 (%)=(1-V_f/V_p)×100 (%) E_<v・p> (%)=ΔV_p/V_o×100 (%) but, ΔV_p (cm^3)=πr^2・l (cm^3) Here V_p represents the volume of fibre or plastic foam under the pressure P (kg/cm^2) and the temperature T(℃) at the moment : V_p, discharged air quantity (weight of ethylene glycol : W_(E)/specific gravity of ethylene glycol : σ_(E)) : V_o, represents the volume of fibre or plastic foam under the pressure P=0 (kg/cm^2) and the temperature T (℃) at the moment : V_f, real volume of fibre or
金城学院大学の論文
1971-12-25

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 7 報)繊維並びにプラスチック発泡体に於ける温度依存性測定装置の試作改良について

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