4.5 Article

Influence of core yarn structure and yarn count on yarn elastic properties

Journal

TEXTILE RESEARCH JOURNAL
Volume 92, Issue 19-20, Pages 3534-3544

Publisher

SAGE PUBLICATIONS LTD
DOI: 10.1177/00405175221084734

Keywords

Single-core; T400 yarn; single-core; lycra yarn; dual-core (elastane; T400) yarn; and tri-core (elastane; T400; elastane) yarn; elastic properties; stress decay; permanent deformation; elastic recovery; relaxation rate; number of cyclic tests

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This study compares the effects of different yarn structures on elastic properties and finds that elastane core-spun and single-core yarns have higher values for most elastic properties. Yarn count and yarn structure significantly influence stress decay, while yarn structure significantly affects permanent deformation and elastic recovery. On the other hand, yarn count significantly affects relaxation rate. Additionally, the number of cyclic tests significantly influences yarn elastic recovery.
This work aims to compare the effects of different yarn structures on the elastic properties. A new type of elastic core-spun yarn which is called tri-core (elastane/T400/elastane) yarn is introduced and tested for elastic properties after cyclic loading. The other yarn structures used are single-core/T400, single-core/lycra, dual-core (elastane/T400) yarn, and yarn without a core component (conventional). The five types of yarn structure were produced at three levels of yarn counts (10, 14, and 18 Ne). Elastic properties after cyclic loading including stress decay, permanent deformation, elastic recovery, and relaxation rate were calculated and statistically analyzed using two-way analysis of variance. The scanning electron microscopy images of the five structures used were produced to illustrate the structure of these yarns. The results determined that elastane/T400/elastane core-spun and single-core/T400 yarns have higher values for most of the elastic properties. It was found that yarn count and yarn structure significantly affect stress decay, while the yarn structure significantly affects permanent deformation and elastic recovery. On the other hand, yarn count significantly affects the relaxation rate. Data showed that the number of cyclic tests significantly influences yarn elastic recovery.

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