Abstract
There is a close relation between damp or oppressive sense and the clingy forces of wet fabrics. In the previous paper the clingy forces were calculated for a geometrical model, given on the assumption in the range of a moderate amount of water content.
In this paper, the clingy forces or wettedness were calculated for two geometrical models, given on the assumption in the presence of a large or small quantity of water and the following results were obtained:
(1) Three models derived, including one in the previous paper, has common characteristics in the influences of the various parameters on the clingy forces and wettedness of wet fabrics.
(2) It was suggested that attractive forces appeared sensitively in the range of low water content and there was a close relation between the hygroscopicity of fibers and the attractive forces.
It was assumed that the hygroscopic fibers reduced the attractive forces in the range of low water content, whereas the relation became reversed in the range of high water content.
(3) The larger the contact angle of water on the contacting surface and the smaller that of water on the fibers, the smaller the wettedness. The smaller the contact angles of water on both the contacting surface and the fibers, the larger the attractive forces. That is to say, it was suggested that in the range of high water content, which the limit of the wiping off ability by the fabrics was observed, the more wettable the fabrics, the larger the attractive forces.
