Thermal Comfort Properties of Bi-Layer Knitted Fabrics

Abstract

Transmission of sensible and insensible perspiration is an important factor for fabric comfort. Improvement in the thermal comfort properties of knitted fabrics results in the achievement of fabric comfort. In this research, the thermal comfort properties of six bi-layer knitted fabrics were studied. The bi-layer knitted fabrics were made with different combinations of yarn in the inner layer and outer layer. The yarn combinations selected were polyester staple yarn-polyester staple yarn, polyester staple yarn-cotton, cotton-cotton, polypropylene-cotton, micro denier polyester-cotton, and micro denier polyester- micro denier polyester for the inner and outer layers, respectively. To find the thermal comfort properties of the six bi-layer knitted fabrics, an objective fabric test was carried out. The results showed that the bi-layer fabrics made from micro denier polyester, both in the inner and outer layers, exhibit better thermal comfort properties, thereby providing a higher level of comfort; hence, they are preferred for active sportswear. The water vapour permeability, air permeability, thermal resistance and thermal conductivity of the bi-layer knitted fabric made up of micro denier polyester as the outer and inner layer were found to be higher when compared to the other bi-layer structures. The results were discussed together with one – way ANOVA test results at a 0.05 significance level.

Influence of the Fabric Topology on the Performance of a Textile-Based Triboelectric Nanogenerator for Self-Powered Monitoring

“…The surface of textile fiber exhibits inherent microroughness, which is enhanced by simpler yarn processing technologies such as texturizing. The texturing process transforms the configuration of a continuous multifilament or staple fiber yarn into an entangled spun yarn-like structure using air, a water jet stream, or a mechanical twister arrangement. , The fiber and yarn structural arrangements provide a unique surface texture to the fabric, which imparts the roughness to its surface. The contact area between the two surfaces is mainly affected by the roughness of the material; hence, the analysis of surface roughness is an important parameter.…”

Effect of plasma sericin glutaraldehyde treatments on the low stress mechanical properties of micro denier polyester/cotton blended fabric

“…Innovative production techniques are the need of the hour for the textile industries to improve product quality and functional properties. In recent years, microfibers are emerging in the textile industry for various applications and similarly, manmade fibers are being upgraded to make them superior to natural fibers in appearance, physical and comfort properties 1 , 2 .The blending of microdenier polyester fibers (MDP/C) along with cotton fibers has become popular because it gives a valuable combination of properties to both fibers 3 . It is evidenced that micro denier polyester fibers blended with cotton fibers results in enhanced fabric properties and contributes to high strength, good wicking, moisture absorbency, air permeability properties and environmental friendliness 4 , 5 .…”

Investigation of moisture transfer properties of double-face weft knitted fabrics for sports clothing

“…The air permeability, thermal conductivity, and wicking characteristics of bi-layer knitted fabric with one tuck point are greatly influenced by the thickness of the fabric [29]. The water vapour permeability, air permeability, thermal resistance and thermal conductivity of the bi-layer knitted fabric made up of micro-denier polyester in the outer and inner layers were found to be higher when compared to polyester staple yarn-polyester staple yarn, polyester staple yarn-cotton, cotton-cotton and polypropylene-cotton fabrics [30]. The bi-layer knitted fabric with a tuck on the 12th wale exhibits better thermal comfort properties than a tuck on the 4th, 8th, and 16th wale [31].…”