繊維集合体のぬれ挙動の動水力学的測定法について

抄録

To achieve the evenness in the effects of wet processes such as dyeing and finishing in water systems, the level wetting of textile fibers is required. For the first step of wet processes, displacement of air in fiber assembly by dip-solution and forced exclusion of displaced air are of essential importance.
Considering these points, a hydrodynamic study on the wettability of fiber assemblies was performed by constructing an apparatus in which dip-solution could be poured into the sample chamber under the constant hydrostatic water pressure. The estimations of effluence and pressure loss produced by the mass of fibers and air in fiber assembly gave the value of flow-resistance and permitted a comparison on wettability.
Some attensions and devices paid for these estimations were as follows; 1) the simultaneous values of effluence and pressure loss, 2) pre-exclusion of bubbles in dip-solution, 3) preventation of onesided flow along the inner wall of sample chamber in which fibers were packed - for this purpose, the chamber was made with polyacrylate resin which had low surface energy, 4) electrical detection and record of water pressure in responce to sharp change in pressure.
In this study, the various effects on the flow-resistance were determined on wool fibers having poor wetting properties and the effectiveness of forced flow of dip-solutions on level wetting was recognized.