ラローズ法による布の吸水挙動に対する一つの評価方法

概要

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Using the previously reported laser scanning micrometer for Larose Method, water absorbency of cotton towel. Kanakin and acrylic towel were studied with various contact areas by inserting PET disk with a hole. Results could be roughly expressed by ∂u/∂t=α(∂^2u/∂r^2+1/r・∂u/∂r)+β∂^2u/∂z^2 where u is absorbed ratio to the equilibrium uptake, t is time, and r and z are the space coordinates measured along parallel and perpendicular directions to the plane of cloth, respectively. Concentration of water was numerically calculated by means of its finite-difference representations. This equation is the same as that of diffusion by cylindrical coordinates. Coefficients of α and β, were approximately determined in order to resemble the calculated curves of the experimental results. The magnitude of these coefficients is a measure of water absorbency. The rate of uptaking along the parallel direction in the plane of cloth was much faster than that along the perpendicular direction. The ratio of β to α(β/α) ranged from 0.1 to 0.01, depending on the sensitive characteristic of cloth.
社団法人日本家政学会の論文
1993-07-15