Iris Publishers_Journal of Textile Science & Fashion Technology (JTSFT)

A Study on Thermal Comfort Feeling Properties of 60%/40% and 80%/20% Cotton/Polyester and 100% Cotton Fleece

Abstract

In this study, thermal properties of 60%/40% & 80%/20% Cotton/Polyester and 100% Cotton fleece fabrics were investigated. It is known that Cotton fiber has good comfort properties and Polyester fiber is especially known for its strength, anti-wrinkle, anti-mildew, whiteness. The aim of this study was to determine the most thermally comfortable combination of these two fibres among the three most used common blend ratios of these two. First, cotton and Polyester fibers spun with different blend ratios standard spinning systems. Then, three thread fleece fabrics were produced with these yarns having 60%/40% and 80%/20% Cotton/Polyester and 100% Cotton and the thermal comfort parameters of fabrics were measured on Standard devices. The three-fleece fabric only varied in yarn composition. And all other parameters were the same for all three. The results indicated that the 80%/20% Cotton/Polyester has the most desired thermal comfort properties.

Keywords: Air Permeability; Cotton fabric; Thermal conductivity; Thermal resistance; Water vapor Permeability

Introduction

In recent years there has been a very fast growth in the knitting section of the textile industry. A demand for weft knitted garments has increased many folds over the years in the domestic and export markets. Knit fabrics have found its wider use in time since they can be produced more easily for a lower cost, and they are more flexible. The ever-increasing demand of knitted apparels has attracted attention in global niche market. In comparison to woven garment, around 50% of the clothing needs are met by the knitted goods [1-3].

Consumers of textile and clothing products are becoming increasingly aware of the importance of the comfort. In addition to aesthetic appearance, the comfort is one of the main properties of clothing, which affects the choice of product. The term comfort is a subjective concept which is only recognized by the person experiencing it. It can be defined as “the absence of displeasure or discomfort or a neutral state compared to the more active state of pleasure“. A state of comfort can only be achieved when the most complex interactions between a range of psychological and physical factors have taken place in a satisfactory manner [3-5]. However, knit fabrics are less stable than weave fabrics since they are produced with low twist yarn and have a slack construction, as a result of which they have a low dimensional stability and pilling performance. Especially in garments produced from knit fabric and garments approaching a state of disuse does the pilling problem play an important rule [6,7].

When garments are worn, the heat and moisture diffused from skin, get exchanged by several transfer mechanisms. These mechanisms are simply thermo-physiological regulators that include heat and mass transport through the textile layers to keep the energetic balance between the human body and environment. These two concepts are considered to characterize the thermophysiological comfort [4]. The mass transport concerns the moisture vapor, air permeability and heat transfer concerns with thermal resistance and thermal conductivity. In this project we are going to emphasize on the thermal comfort of 60/40, 80/20 cottonpolyester blend and 100% cotton [8,9].

In this project we took the 3 most used fleeces 60%/40% & 80%-20% Cotton-Polyester and 100% Cotton Fleece and we put our efforts to determine which of these three would be most comfortable to wear in winter season. The thermal comfortness of these fleeces largely depends on some properties like air permeability, thermal conductivity, thermal resistance, moisture vapor permeability etc. [5,7].

So, in this project work, we have tried to measure the air permeability of these fleece and the thermal conductivity and thermal resistance of fleece fabrics of these 3 specifications. Also measures the moisture vapor permeability and identified the fleece which are most suitable to wear during the winter season.

Materials and Methods

Materials

Fabric

• M/c GG: 30˝ × 20 GG

• Fabric : Fleece

• S. length : Base/4.65 + Binding/3.65 + Loop/1.65

• F.G.S.M : 270

• Yarn : 30s /1 cotton/polyester blend (Figures 1&2)

Iris Publishers

For More Information: https://irispublishers.com/jtsft/fulltext/a-study-on-thermal-comfort-feeling-properties-of-60-40-and-80-20-cotton-polyester.ID.000586.php 


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