Abstract
This work discusses the contribution of the elastane filament (Spandex (c)) on the appearance of wet pneumatic elastic denim core-spun yarn. The cross-section views of the splice region were investigated using the image analysis method. In fact, this work also defines developed parameters such as the cover factor and the relative distance for quantifying the contribution of Spandex (c) filament position to the spliced yarn appearance. To improve the objective method (the image analysis), the subjective one (the expert's rating and the composite desirability) was discussed. Compared to the computer image analysis results, the desirability function provides nearly identical results and proves that appearance can be evaluated objectively. However, compared to the expert's rating which can complete the computer results, it remains insufficient to subjectively classify the splice appearance. Hence, our findings show that the Spandex (c) filament angular position is influenced by the important splicing conditions (splice length and duration of water joining). By providing the adequate splicing condition adjustments high splice physical performance is given and a particularly good appearance.