Factors That Affecting Air Permeability of 100% Cotton Singlejersey Fabric.

Pranta, Md. Arif Hosen; Shanto, Afsan Mahamud

Factors That Affecting Air Permeability of 100% Cotton Singlejersey Fabric.

Pranta, Md. Arif Hosen; Shanto, Afsan Mahamud

URI: http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/4508

Date: 2019-04-25

Abstract:

The goal of the study was to determine the effects of WPI, CPI, loop length, GSM, thickness of knitted fabrics on comfort parameters including air permeability. For this purpose, comfort properties of 100% cotton single jersey fabrics were determined. 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 worth has significance with respect to the usage area. Then knitted fabrics have a loop construction, they have extra pores than woven fabrics; therefore, in general, the air permeability of knitted fabrics is higher than that of woven fabrics of the same weight. It was found that knitted fabric of tighter structure has high weight and thickness but lower the value of air permeability. During my work we get some excellent test results which really help us to done our work perfectly.

Description:

Knitting is the process fabric is forming by interloping yarn in a series of connected loops using needles. Knit fabrics provide outstanding comfort qualities and it also have long been preferred in many types of clothing. In adding to comfort imparted by the extensible looped construction, knits also provide lightweight warmth, wrinkle resistance, and ease of care [1]. With comparing other textile fabric structures, like woven and braided, knitted structures have more open character [2]. Knitted fabrics are mostly used for their easy care properties and high degree of clothing comfort. Liquid moisture transport and breathability of the fabric are the two most significant factors of fabrics that highly affects the thermo-physiological comfort of a fabric. Thermo- physiological comfort properties of fabric have some affecting parameters by which they are mainly influenced and the parameters are fiber type, yarn parameters, fabric characteristics and finishingprocesses. For evaluating and comparing the ‘breathability’ of various fabrics for such end uses as raincoats, tents and uniform shirting air permeability is often used. It helps to evaluate the performanceof parachutes sails, vacuum cleaners, air bags, sail cloth and industrial filter fabrics. Air permeability is defined as “vertical air flow rate through a test subject” by Turkish Standards Institute [3]. For the performance of useful textile products such as industrial filters, tents, sails, parachutes, airbags, raincoat fabrics and outdoor clothing, it is especially critical. For outdoor clothing in order to enable protection against the wind low air permeability fabrics are preferred [4]. Thermal resistance and moisture permeation is directly associated with air permeability. An air permeable fabric also lets the transition of liquid and vapor. The level of air permeability varies depending on type of yarn, fabric structure, fiber parameters. Furthermore, thermal resistance is related with the air trapped between the skin and the clothing. Air permeability affects the comfort aspects of a garments according to passing air through the garments. Fabrics can be divided as high air permeable and low air permeable fabric according to air permeability. High air permeable fabric gives lower protection against winds and low air permeable fabrics causes heavy body perspiration. Knitted fabrics are more air permeable than woven fabrics so knitted fabrics are preferred for human clothing. Loosely knitted fabric samples which has higher amount of entrapped air and shows good air permeability property but poor moisture management properties. So we can say that, it is important for the textile industry to determine the air permeability of knitted fabrics. For all types of knitted fabrics, bursting strength values increased and fabric spirality values decreased with the increase elastane amount and elastane yarn count. There is a significant relationship between elastine amount and count with airpermeability, spirality, bursting strength and drape.

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