The study of the traction behaviour of knitted structures with controlled dimensional stability

Abstract

This paper proposes a comparative study of the tensile behaviour of the knitwear under linen made of 100% cotton yarn in 1:1 rib with Nm 50/1 and 2:2 rib with Nm 40/1. The rib structures 1:1 are more dimensionally stable than the rib structures 2:2, on both directions, due to the higher number of yarn-yarn contact points and due to the distribution of the rib platinum loop. The studies made on the proposed structures have demonstrated that it can be obtained an almost identical dimensional stability, which fits in the limits ±2, if for the rib structures 2:2 thicker yarns are being used. After knitting and finishing, the structure parameters of the knits are determined and then they are subjected to the tensile strength, and the result after processing the obtained data, it is concluded that the behaviour of the knits at the tensile stresses is comparable to the real situation. The study is carried out on both directions of the knits, in the horizontal direction, of the rows of meshes and in the vertical direction of the strings. The performance-elongation diagrams are represented through graphics and the results obtained are interpreted, the data being used to determine the structure parameters of the knits in order to obtain maximum dimensional stability at wearing.