Study on crease recovery property of warp-knitted jacquard spacer shoe upper material

Abstract

Shoe upper materials are often subjected to repeated creasing in use, which affects their shape retention and aesthetic. The crease recovery property of fabrics is an important property that affects its serviceability. Six variants of warp-knitted jacquard spacer fabrics with different jacquard layer structures were selected and the crease recovery angles on six orientation angles were tested for 30 cycles. The relationship between different orientation angles and crease recovery angles was studied and the comprehensive index for evaluating the crease recovery property of fabric was extracted by the grey relation analysis. The effect of the jacquard layer structure and the number of cycles on crease recovery property was analyzed with MATLAB. The results indicated that the crease recovery angles on different orientation angles were significantly different, and the comprehensive index could evaluate the crease recovery property more reasonably. The influence of the 3-needle underlap and the chain underlap on the crease recovery property was the most significant, and the influence of the 3-needle underlap was greater than that of the chain underlap. Base on solid structure, reducing the proportion of mesh structure or adding semi-transparent structure could improve the crease recovery property. The change rule of crease recovery angles with the number of cycles could be elucidated by the exponential function.