Modelling of the longitudinal structure of elastic spliced yarns

Abstract

In this work, a descriptive model was established for the longitudinal structure of wet pneumatic spliced yarn. Compared to classical spliced yarns which contain a symmetrical twisting zone our microscopic analysis revealed that elastic spliced yarns present two more asymmetrical twisted zones. Our study shows that the wet pneumatic splice can be defined by six parameters which are: zones of splice, length of each zone, splice length, number of twist turns on each zone, two elastane filament ends and centre x coordinates. These parameters were tested for 167 specimens. Analysing this database, we developed a descriptive model which helps to understand the spliced elastic yarn structure.

Keywords:

• microscopic analysis
• wet pneumatic splice
• longitudinal structure
• elastic yarn
• Lycra^® filament
• descriptive model