繊維の圧縮測定に関する研究 : (第 5 報)混合繊維塊の外圧∿空隙率線図について

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The purpose of the research in this paper is to make clear the relation between pressure and percentage of porosity, examine compressibility and compressional resilience in blended fibre's lump of several 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. 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 several kind's fibre of test pieces, Viscose Rayon (Curl Dull), Kanekalon (N-Type), Polynozic, Bemberg and Pylen have been used. The cut-length and fineness of the test piece is 76 mi meters 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. The percentages of blending in each blended fibres is 30,50 and 70 percentages. The theoretical equation of porosity percentage ε (%) under pressure P is following, 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 (%) but, ΔV_p (cm^3)=πr^2・l (cm^3) Here V_o (cm^3) represents the volume of fibre under the pressure P=O (kg/cm^2) at the moment : ΔV_p (cm^3), discharged air quantity under the pressure P (kg/cm^2) at the moment : V_f (cm^3), real volume of fibre V_f=W_f/σ_f (cm^3) : σ_f (g/cm^3), specific gravity of fibre : V_p (cm^3), volume of fibre under the pressure P (kg/cm^2) at the moment : r (m/m), radius of hole of glass capillary tube : l (cm), displaced length of column of mercury into the glass capillary tube. also, The theoretical equation on the specific gravity of blended fibre M (g/cm^3) is obtained, M (g/cm^3)=(b(100-X)+aX)/100 (g/cm^3) or M (g/cm^3)=b-((b-a)X)/100 (g/cm^3) but, X (%)=(b-M)/(b-a)×100 (%) Here M (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). Before the experiment, special 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. Thus, the author examined compressibility, compressional resilience, property of recovery from pressure P=X (kg/cm^2) and from pressure P=O (kg/cm^2) to state of rest, 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.
1969-12-25

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 5 報)混合繊維塊の外圧∿空隙率線図について

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