Compression of Greystate Fabrics as a Function of Yarn Structure

Data analysis of the compression of a fabric can only be done using a mathematical model to smooth the results. The best formula is Van Wyk's, although the meaning of the physical parameters is very difficult to define for a fabric. On the basis of Van Wyck's equation, a study of the compressibility of a fabric whose weft is made of multiple threads (classic ply-yams, open-end, combed or carded) shows that the struc ture of a fabric has a higher value than the structure of a thread. The mechanical properties of a fabric are supposed to be essentially due to its construction and, to a lesser extent, to the threads from which it is made.