Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading
Elastic knitted fabrics find numerous applications in the industry for compression stockings, sports and leisure wear, swimwear, ballet wear, etc. During its use, knitwear is subjected to dynamic loading due to body movements. The loading and unloading of the knitted fabric affect the size of the el...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-09-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/19/6512 |
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| author | Tea Jovanović Željko Penava Zlatko Vrljičak |
| author_facet | Tea Jovanović Željko Penava Zlatko Vrljičak |
| author_sort | Tea Jovanović |
| collection | DOAJ |
| description | Elastic knitted fabrics find numerous applications in the industry for compression stockings, sports and leisure wear, swimwear, ballet wear, etc. During its use, knitwear is subjected to dynamic loading due to body movements. The loading and unloading of the knitted fabric affect the size of the elastic region in which unrecovered deformation completely disappears. This paper deals with the influence of the elastane percentage in the knitted fabric on the elastic properties of the knitted fabric under dynamic loading. For this experiment, three types of yarn were used in different combinations: polyamide (PA), wrapped elastane yarn and bare elastane. The mentioned yarns were used to knit three different groups of plated weft-knitted fabrics (two yarns in a knitted fabric row): without elastane, knitted fabric with a percentage of wrapped elastane, and knitted fabric with a percentage of bare elastane. The percentage of elastane ranged between 0% and 43%. First, standard uniaxial tensile tests were performed on knitted fabric samples until breakage under static load. The force–elongation diagrams obtained are used to determine the elastic limit up to which Hook’s law applies. All knitted fabrics were cyclically tested to the elastic limit. From the obtained loading and unloading curves, unrecovered deformation (unrecovered elongation), elastic elongation and hysteresis index were determined and calculated. The results showed that the percentage of elastane significantly affects the size of the elastic region of the knitted fabric and has no effect on the hysteresis index. Therefore, it is necessary to optimize the elastane percentage for different knitted fabric designs to achieve the best dynamic recovery of the knitted fabric and to design a more stretchable knitted garment that fits the body as well as possible. |
| first_indexed | 2024-03-09T21:32:44Z |
| format | Article |
| id | doaj.art-ba0c6ecc926d47f3bb4e65d65f7eb22a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:32:44Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-ba0c6ecc926d47f3bb4e65d65f7eb22a2023-11-23T20:52:10ZengMDPI AGMaterials1996-19442022-09-011519651210.3390/ma15196512Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic LoadingTea Jovanović0Željko Penava1Zlatko Vrljičak2Department of Textile Design and Management, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, CroatiaDepartment of Textile Design and Management, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, CroatiaDepartment of Textile Design and Management, Faculty of Textile Technology, University of Zagreb, 10000 Zagreb, CroatiaElastic knitted fabrics find numerous applications in the industry for compression stockings, sports and leisure wear, swimwear, ballet wear, etc. During its use, knitwear is subjected to dynamic loading due to body movements. The loading and unloading of the knitted fabric affect the size of the elastic region in which unrecovered deformation completely disappears. This paper deals with the influence of the elastane percentage in the knitted fabric on the elastic properties of the knitted fabric under dynamic loading. For this experiment, three types of yarn were used in different combinations: polyamide (PA), wrapped elastane yarn and bare elastane. The mentioned yarns were used to knit three different groups of plated weft-knitted fabrics (two yarns in a knitted fabric row): without elastane, knitted fabric with a percentage of wrapped elastane, and knitted fabric with a percentage of bare elastane. The percentage of elastane ranged between 0% and 43%. First, standard uniaxial tensile tests were performed on knitted fabric samples until breakage under static load. The force–elongation diagrams obtained are used to determine the elastic limit up to which Hook’s law applies. All knitted fabrics were cyclically tested to the elastic limit. From the obtained loading and unloading curves, unrecovered deformation (unrecovered elongation), elastic elongation and hysteresis index were determined and calculated. The results showed that the percentage of elastane significantly affects the size of the elastic region of the knitted fabric and has no effect on the hysteresis index. Therefore, it is necessary to optimize the elastane percentage for different knitted fabric designs to achieve the best dynamic recovery of the knitted fabric and to design a more stretchable knitted garment that fits the body as well as possible.https://www.mdpi.com/1996-1944/15/19/6512knitted fabriccycle loadelastic limitelastanehysteresis curve |
| spellingShingle | Tea Jovanović Željko Penava Zlatko Vrljičak Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading Materials knitted fabric cycle load elastic limit elastane hysteresis curve |
| title | Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading |
| title_full | Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading |
| title_fullStr | Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading |
| title_full_unstemmed | Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading |
| title_short | Impact of the Elastane Percentage on the Elastic Properties of Knitted Fabrics under Cyclic Loading |
| title_sort | impact of the elastane percentage on the elastic properties of knitted fabrics under cyclic loading |
| topic | knitted fabric cycle load elastic limit elastane hysteresis curve |
| url | https://www.mdpi.com/1996-1944/15/19/6512 |
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