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Investigation on the Air and Water Vapour Permeability of Double-Layered Weft Knitted Fabrics

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Abstract:

During the investigation, double-layered weft knitted fabrics for leisure sports were designed with physiological and thermal comfort in mind. Physiological comfort is determined by the state of the organism during physical activity, and thermal comfort is determined by the feeling of warmth/coldness and damp/dryness, which depends on the air permeability and capability to absorb and evaporate sweat. The main goal of this study was to investigate the influence of knitting structure, fibre type, and yarn properties on the air and water vapour permeability of double-layered weft knitted fabrics. An investigation was carried out using fabrics knitted in plain plating and with combined structures on a circular knitting machine. One layer (outer) was made from cotton yarns or man-made bamboo yarns and the other one (inner) was from synthetic fibre yarns (polypropylene, polyester and polyamide). The study established that the fibre composition of yarn and knitting structure parameters, such as the loop length, area linear filling rate and pattern have a significant influence on the air permeability of double-layered weft knitted fabrics. The main influence on the water vapour permeability of double–layered knitted fabrics is the kind of raw material i.e. the wetting and wicking properties of fibres.

Tags: air permeability, water vapour permeability, double-layeredfabric, weft knitted fabric.

Citation: Bivainyte A., Mikučioniene D.; Investigation on the Air and Water Vapour Permeability of Double-Layered Weft Knitted Fabrics. FIBRES & TEXTILES in Eastern Europe 2011, Vol. 19, No. 3 (86) pp. 69-73.

Published in issue no 3 (86) / 2011, pages 69–73.

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