MEASUREMENT OF COMPRESSIONAL MODULUS OF TEXTILE FABRICS BY MEANS OF ROLLING FRICTION

1) A method to obtain a commpressional modulus of textile fabrics by means of rolling friction when a solid cylinder rolls on the fabric is devised and practically three methods i. e rolling. inclined and oscillating methods are used according to the properties of specimen. 2) When a weight of roller of radius (r), and width (b) is W, width of contact between roller and fabric is (a), Poisson's ratio is v1, a compressional modulus of fabrics E1 may expressed as: (4) If contact width (a) is obtained experimentally by a method described in 1), E may be obtained. 3) This method depends upon the roller weight and hysteresis of fabric, but good reproducible values are obtained by considering these effects. 4) A compressional modulus is inversely proportional approximately to its bulkiness, and this effect is very remarkable.