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 t o 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 thread s (classic ply-yarns, open-end, combed or carded) shows that the struc ture of a fabric has a higher value than the structure of a thread. Th e mechanical properties of a fabric are supposed to be essentially due to its construction and, to a lesser extent, to the threads from whic h it is made.