Investigation of friction properties of yarns from natural fibres

Abstract

Investigation results of friction properties of natural fibres ant their blends with classic fibres yarns are presented in the article. When processing various yarns, it is vitally important to know the friction properties and friction ratio of these yarns, which indicate the possibilities of processing and, together with knitted structure, indicate the properties of the knitting. The experiments were performed with flax, bamboo, bamboo + flax, soy, cotton + sea cell yarns. Yarn speed, axial tension, friction body curvature dependence on friction ratio were determinated by these experiments. The experiments show, that big curvature and big axial force make friction ration to decrease. The friction ration is increasing, when axial force is small. Yarn speed has a small influence, that's why all the investigated yarns can be easily processed in knitting, except flax, which has the highest friction properties and is the most rigid. We recommend to use flax just in mixed yarns. It is determined, that for investigated yarns there is maximum of friction ratio then axial stress of yarn is 10 cN.