Investigation of porosity and air permeability values of plain knitted fabrics

• Autorzy: Ogulata R. T. , Mavruz S.

Warianty tytułu

PL

Badanie przepuszczalności powietrza i porowatości dzianin

• Języki publikacji: EN

Abstrakty

EN

The air permeability of a fabric is defined as the amount of air passed over a surface under a certain pressure difference in a unit time. This value has significance with respect to the usage area. Since knitted fabrics have a loop structure, they have more pores than woven fabrics; therefore, in general, the air permeability of knitted fabrics is higher than that of woven fabrics of the same weight. An experiment to determine the air permeability is very important as it defines the properties of keeping warm, protection against the wind, breathability etc. of knitted fabrics used as clothing. In this study, it has been attempted to establish a theoretical model for the porosity and predicted air permeability of plain knitted fabrics. A theoretical model was created to predict the porosity and air permeability of a knitted structure depending on the geometrical parameters, such as the courses per cm, wales per cm, stitch length, fabric thickness, yarn count, diameter of yarn and fiber density. For this purpose, a theoretical model of porous systems based on D’Arcy’s law was used, the validity of which was confirmed by experimental results using 100% cotton plain knitted fabrics produced from ring and compact yarns of different yarn number linear density and tightness.

PL

Dzianiny mają więcej porów w swojej strukturze niż tkaniny, dlatego też przepuszczalność powierza dzianin jest wyższa niż tkanin o tej samej masie powierzchniowej. Wyznaczanie przepuszczalności powietrza jest bardzo ważne dla określenia właściwości, takich jak zatrzymywanie ciepła, ochrona przed wiatrem. W opisanych badaniach stworzono oparty na prawie Darcy’ego model teoretyczny, który umożliwia przewidywanie porowatości i przepuszczalności powietrza dzianin w zależności od parametrów geometrycznych, jak ilość rządków/cm, ilość kolumienek/cm, długość oczka, grubość dzianiny, masa liniowa, średnica przędzy, gęstość.

Słowa kluczowe

EN

knitted structure; porosity; air permeability; geometric modeling

PL

dzianina; porowatość; przepuszczalność powietrza; modelowanie geometryczne

• Wydawca: Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny
• Czasopismo: Fibres & Textiles in Eastern Europe
• Rocznik: 2010
• Tom: Vol. 18, no. 5 (82)
• Strony: 71--75
• Opis fizyczny: Bibliogr. 23 poz., rys., tab.

Twórcy

autor

Ogulata R. T.

• The University of Cukurova, Department of Textile Engineering, 01330 Adana, Turkey

autor

Mavruz S.

• The University of Cukurova, Department of Textile Engineering, 01330 Adana, Turkey

Bibliografia

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• 3. Air Permeability Test Method & Explanatory Notes, www.awta.com.au, 2008.
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• 7. TS 391 EN ISO 9237, Textiles-Determination of the Permeability of Fabrics to Air, Turkish Standards Institution, Ankara, 1999.
• 8. Karaguzel B.; Characterization and Role of Porosity in Knitted Fabrics, MSc Thesis, North Carolina State University, Department of Textile Engineering, Chemistry and Science, 2004.
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