抄録
In order to investigate the effects of the ribs of fabric surface on water repellency, the relation between the diameter 2r and distance 2(r+d) of parallel lining nylon filaments at equal intervals and water repellency was obtained from the sliding angle of water droplets.
Sliding angle was affected by the diameter and distance of filaments, and there was a tendency that the water repellency increased when r became small and r+d became large. When (r+d)/r is over 3, water repellency is excellent.
Cassie and Baxter showed that the water repellency was greatly affected by the surface structure, especially the proportion of the liquid/air interface to the surface area determined the water repellency.
Based on the above results, Cassie and Baster's theory was confirmed to the wide range cylindrical samples by the sliding angle of water droplets.
