Abstract
The fabrics composed of different twist yarns in the warp and filling, curl so much that they roll up diagonally into a double scroll. In this paper, these phenomena are analysed quantitatively by assuming the multi-filar suspension model. The test piese, 1×10 cm size, is cut from warp or filling way. When the twist (curl) angle of a lower end of specimen clamped at an upper end and loaded at the free end is measured experimentaly, the twist moment or twist force is theoretically calculated by the following similutaneous equations.
where, W: load applied at a lower end of specimen. n: yarn density, θ: curl angle of a lower end, 2a: width of test specimen, l: length of test specimen, F: coupling force of a composed yarn, and subscripts W, F denote warp and filling ways respectively.
