三维正交机织物参数对纤维体积含量的影响

三维机织物设计的一个目标是满足要求的纤维体积含量。通过分析三维正交机织物单元体的结构,可以计算经纱、纬纱和捆绑纱的截面尺寸,建立纤维体积含量与织物参数间的关系。实际制织了一块6层经纱、5层纬纱的玻璃纤维三维正交机织布,测试了经纱、纬纱、捆绑纱以及织物的纤维体积含量,并与理论计算值进行了对比,分析了产生误差的原因。最后,分析了织物参数对纤维体积含量的影响,发现经纬纱粗度比的增大或间距比的减小,将使经纱和织物的纤维体积含量增大,纬纱的纤维体积含量减小;捆绑纱的引入,降低了经纱、纬纱和织物的纤维体积含量。 

INFLUENCE OF 3D ORTHOGONAL WOVEN FABRIC PARAMETERS ON THE FIBER VOLUME FRACTION

One of the aims in the design of 3D fabric parameters is to meet the requirement of fiber volume fraction (FVF). By analyzing the unit cell of 3D orthogonal woven fabric, the sizes of warp, fill and binder yarn cross-sections were calculated and the relationships of FVF with the fabric parameters were established. The results could be used to theoretically calculate warp, fill and binder yarns', as well as the fabric's, FVF. A piece of glass fiber orthogonal woven fabric with 6 layer warp yarns and 5 layer fill yarns was manufactured to test the FVF and the calculated values were compared with the tested ones. The reasons that caused the difference between the theoretical values and the experimental values were analyzed. The factors, such as the ratio of warp thickness to fill thickness (Texw/Texf), the ratio of fill yarn density to warp yarn density (d_W/d_F) and the binder thickness, all of which affect FVF, were discussed. It was found that along with the increase of Texw/Texf or the decrease of d_W/d_F, the FVF of warp and fabric would increase, but the FVF in the fill direction would decrease, and the thicker the binder yarn, the smaller would be the warp, fill and fabric's fiber volume fractions.