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THE INFLUENCE OF HUMIDITY ON THE TENSILE STRENGTH AND BREAKING ELONGATION OF YARNS FOR KNITTING SOCKS

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Author(s): Dorin Vlad | Alina Mihaela Coldea

Journal: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork
ISSN 1843-813X

Volume: XIV;
Issue: 2;
Start page: 80;
Date: 2013;
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Keywords: yarns | sock | tensile strength | breaking elongation | humidity

ABSTRACT
Tensile property of textile yarn is a prime important parameter in establish the suitability for any particular application. Breaking strength, elongation, elastic modulus, abrasion resistence etc. are some important factors which will represent the performance of the yarn. It is therefore of utmost importance to determine this characteristic accurately. Raw material characteristics influence properties of the knitted products. The yarns are subjected to mechanical stress during knitting and while wearing the products. The most common types of force applied to knitted fabrics is traction, which usually does not exceed 25 to 30% of breaking strength. In some cases the tensile forces are higher and are producing remanent deformation and damages. On getting dressed, the product is stretched out with a force bigger than during the wearing.Because socks are subjected to tensile forces both in the dry and wet state, we have studied the tensile strength and the breaking elongation for different types of yarn used in knitting these products. Tests were made in dry and wet state using SR EN ISO 2062:2000 Textiles - Yarns from packages- Determination of single-end breaking force and breaking elongation, using Titan2 device. The testing results for tensile strength and breaking elongation are presented in graphics and analysed.
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