Measurement and characterization of bending rigidity of common high-performance yarns

Because the bending rigidity of inlay yarns in the axial fabric has great impact on the 3-D forming property of the fabric,KES-F hand tester was used to characterize the bending rigidity of 4 kinds of common high performance yarns by measuring their maximum bending moments and fitting slopes. The experimental results indicated that with the same linear density,the bending rigidity of high-performance yarns is greater than that of conventional yarns,as for the four kinds of high-performance yarns in the experiment,the order of bending rigidity is as follows: carbon yarn glass fiber yarn UHMWPE yarn aramid yarn; and the rigidity of the high-performance yarns is affected by arrangement and aggregation of filament,and decreases as the enter angle increases.