Mechanically-enhanced structural composites yarns with multifilament-spreading technique using a modified ring spinning system and predicting modelling

Abstract

To advance spinning technology for multifilament covered cotton fibers, a spreading apparatus was introduced to ring spinning. This innovation allowed the manufacturing of a composite yarn with a wrapped structure. However, an effective strategy for predicting the mechanical properties of multifilament spread composite structural yarns (FS-CSY) was urgently needed. In this study, researchers compared FS-CSY with bi-component composite yarn (b-CY) to determine if the addition of a spreading apparatus and twisting in the manufacturing process resulted in any improvements or enhancements. The FS-CSY structure was found to be novel and exhibited significant mechanical properties, including a 4.7% increase in tensile strength compared to b-CY. A strategy was developed to predict FS-CSY by considering the transfer impact of fiber enhancement within the yarn and by incorporating two-component interaction forces in the yarn-wrapped structure. Meanwhile, a modified three-element tensile constitutive model was established to effectively simulate the stress characteristics under different twist levels, which proved the composite yarn prediction theoretical model. Finally, the fracture morphology analysis shown the b-CY fracture surface was irregular, while FS-CSY exhibited a uniform fracture surface, and the 750TPM showed a more uniform and stable structure. By developing this predictive strategy, enhance existing structural composite yarn by maximizing the efficiency and quality of multi-filament covered cotton fibers. Ultimately, this research contributes to advancements in textile manufacturing processes and lays a foundation for future innovations.