Abstract
When filament fabrics are stretched, the reflective properties of fabric surface are remarkably affected by the change of yarn crimp and fiber arrangement in the yarn. This article aims to investigate the influence of a fabric elongation on reflective properties of a fabric surface by using a goniophotometer provided with a tensile instrument trially manufactured. Samples are plain fabrics of nylon monofilament and multifilament. The difference of surface reflective properties of both fabrics are discussed by the two-dimensional gonio-photometric method. The results obtained as follows : In a monofilament fabric, the angle of maximum reflection (crimp angle) degreases linearly to the angle of regular reflection with increasing elongation, but the variation of the maximum reflection is little. In multifilament fabrics, however, both the crimp angle and maximum reflection change with increasing elongation. Thus, the maximum reflection relates mainly to fiber arrangement and the angle of maximum reflection relates to the crimp angle. The crimp angle of monofilament fabrics obtained by goniophotometric method agrees well with the arc model and that of multifilament fabrics agrees with the Peirce model.
