繊維の圧縮測定に関する研究 : (第 8 報)混合繊維塊の外圧∿空隙率線図 : (履歴現象の究明)

概要

論文の詳細を見る
The purpose of the experiment in this paper is to make clear the relation between pressure and percentage of porosity in hysteresis, examine its hysteresis phenomenon of compressibility and compressional resilience in blended fibre's lump of several kind's fibres by the aid of improved equipment, trial manufactured equipment that is study developed by author in a series of this paper, registered as Patent Number 486847 in Japan Patent Office. The experiment of this thesis 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 author concentrated special attention on the increase and decrease of pressure from 0 (kg/cm^2) to 0.05 (kg/cm^2). As the number of times in hysteresis is from the first time to the fifth time in the increasing and decreasing pressure. As the several kind's fibre of test pieces, Pylen, Kanekalon (N-Type), Viscose Rayon (Curl Dull), Polynozic and Bemberg have been used. The cut-length and fineness of the test piece is unified 76 milimeters and 3 deniers. All of thease fibres is not straight filament, but crimped fibre. As the blended fibre of the test piece, Viscose Rayon (crimped dull)×Kanekalon (N-Type), Viscose Rayon (crimped dull)×Pylen, Viscose Rayon (crimped dull)×Bemberg, Viscose Rayon (crimped dull)×Polynozic, Kanekalon (N-Type)×Pylen, Kanekalon (N-Type)×Bemberg, Kanekalon (N-Type)×Polynozic, Pylen×Bemberg, Pylen×Polynozic and Bemberg×Polynozic have been used. As the percentages of blending in thease each blended fibres adopted 30,50 and 70 percentages. Before the experiment, greatest possible care taken to the regulate and arrangement the test pieces used. Blending of A-Fibre F (A) and B-Fibre F (B) is conducted by hand carding. Discrimination of blended state between A-Fibre F (A) and B-Fibre F (B) is conducted by a coloring agent of Identification Stain No. 4 of Du Pont, Bokenstain or Kayastain A. The theoretical equation of porosity percentage ε(%) under the pressure P (kg/cm^2) is following, ε(%)=(Vo-⊿Vp-Vf)/(Vo-⊿Vp)×100(%)=(Vp-Vf)/Vp×100(%)=(1-Vf/Vp)×100(%) but, ⊿Vp (cm^3)=πr^2・ℓ(cm^3) Here Vo(cm^3) represents the volume of fibre under the pressure P=0 (kg/cm^2) at the moment : ⊿Vp (cm^3), discharged air quantity under the pressure P (kg/cm^2) at the moment : Vf (cm^3), real volume of fibre Vf=Wf/σf (cm^3) : σf (g/cm^3), specific gravity of fibre : Vp (cm^3), volume of fibre under the pressure P (kg/cm^2) at the moment : r (m/m), radius of hole in the glass capillary tube : ℓ(m/m), displaced length of column of mercury into the glass capillary tube : also, The theoretical equation on the specific gravity of blended fibre σf (g/cm^3) is obtained, σf (g/cm^3)=b(100-X)+aX/100(g/cm^3) or σf(g/cm^3)=b-(b-a)X/100(g/cm^3) but, X(%)=(b-σf)/(b-a)×100(%) Here σf (g/cm^3) represents the specific gravity of blended fibre on A-Fibre F (A) and B-Fibre F (B) : a (g/cm^3), specific gravity of A-Fibre F (A) : b (g/cm^3), specific gravity of B-Fibre F (B) : X (%), containing percentages of A-Fibre F (A). The author examined compressibility, compressional resilience, property of recovery, durability of compression, the question of blending percentage or combination of fibre in the blended fibre's lump, comparison of porosity percentage ε(%) and critical porosity percentage in theory ε'(%) through the analytical research of pressure∿porosity percentage curve and hysteresis phenomenon of extending from the first time to the fifth time in the increasing and decreasing pressure. Thus, the author consider compressional behavior on the basis of thease experimental results.
1972-12-25

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 8 報)混合繊維塊の外圧∿空隙率線図 : (履歴現象の究明)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク