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Evaluation of Physical and Mechanical Properties of Knitted Fabrics for Use in Footwear Uppers for School-Age Children

Field of Science:EngineeringIndustrial and Manufacturing EngineeringMaterials Science
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“TEXTILE JOURNAL OF UZBEKISTAN” Scientific-technical journal

“TEXTILE JOURNAL OF UZBEKISTAN” Scientific-technical journal

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ARTICLE ANNOTATION

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Selecting upper materials for school-age children’s footwear requires consideration of the anatomical and physiological characteristics of the growing foot, dynamic loading patterns, and hygiene-related requirements. The aim of this study is to experimentally evaluate the suitability of flat-knitted fabrics made from polyamide (Nylon 150D) and polyester (Polyester 150D) for footwear uppers for school-age children and to compare the results with the regulatory thresholds specified in GOST 26165-2003 and TR TS 007/2011. Three knit structure variants and five yarn composition ratios (100/0; 75/25; 50/50; 25/75; 0/100) were investigated. Testing was performed in accordance with ISO 13934-1 (tensile strength and elongation at break), ISO 9237 (air permeability), and ISO 139 (standard conditioning atmosphere). The results demonstrate that all samples meet the minimum requirements for tensile strength (≥700–800 N), elongation at break (90–150%), air permeability (≥60 cm³/cm²·s), and hygroscopicity (≥2%). The most balanced performance was obtained for knit variant No. 2 with a 50/50 nylon/polyester ratio: tensile strength 1145 N, elongation 101%, hygroscopicity 2.61%, air permeability 94.6 cm³/cm²·s, and areal density 668 g/m². This option is recommended as a baseline material for school footwear uppers, with functional zoning strategies such as local reinforcement in toe and heel areas while maintaining ventilation in the forefoot region.

AUTHORS

З.Ирисова

TOSHKENT TO'QIMACHILIK VA YENGIL SANOAT INSTITUTI

Tags

# physical and mechanical properties# polyester# hygroscopicity# knitted fabrics# air permeability# nylon# school footwear

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