{"title":"Effect of layering outerwear on innerwear and air gap between the two layers on thermal comfort properties of knitted fabrics","authors":"Meghana Kammeta, N.K. Palaniswamy","doi":"10.1108/ijcst-10-2023-0148","DOIUrl":null,"url":null,"abstract":"<h3>Purpose</h3>\n<p>In everyday life, people generally wear two layers of clothes (a knitted vest and a knitted t-shirt) during the summer. It is essential to understand which types of innerwear and outerwear maximize comfort. The primary objective of this research is to investigate the influence of layering outerwear on innerwear, as well as the air gap between two layers, on thermal comfort properties.</p><!--/ Abstract__block -->\n<h3>Design/methodology/approach</h3>\n<p>In this study, a total of 12 combinations were created from four vest fabrics and three T-shirt fabrics. The thermal properties (thermal conductivity, thermal resistance, thermal absorptivity, thermal diffusion and peak heat flow) were evaluated for the individual inner and outer layers. Each inner layer was layered with an outer layer to observe the effect of layering on the thermal properties. An air gap of 2 mm was introduced between the inner and outer layers to study the effect of air gap on thermal properties.</p><!--/ Abstract__block -->\n<h3>Findings</h3>\n<p>Tencel fibre exhibits higher thermal conductivity and absorptivity than cotton and polyester. Upon layering an outer layer on an inner layer, the thermal conductivity and thermal absorptivity increase to a slight extent, thermal resistance and diffusion increase drastically and the peak heat flow reduces. With an air gap between the two layers, the thermal conductivity did not improve, the difference in thermal resistance among all the combinations reduced, the thermal absorptivity of the combination textiles was lower than that of the innerwear alone, the thermal diffusion increased and the peak heat flow diminished for all the combinations.</p><!--/ Abstract__block -->\n<h3>Practical implications</h3>\n<p>In practice, this comprehensive thermal comfort analysis provides specific combinations of inner and outer articles of clothing that are most appropriate for enhancing comfort during the summer season.</p><!--/ Abstract__block -->\n<h3>Originality/value</h3>\n<p>Though there are many studies on the effect of multilayer fabrics on thermal properties, no extensive research analyses the influence of innerwear and outerwear combinations on thermal comfort properties.</p><!--/ Abstract__block -->","PeriodicalId":50330,"journal":{"name":"International Journal of Clothing Science and Technology","volume":"58 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Clothing Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1108/ijcst-10-2023-0148","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, TEXTILES","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose
In everyday life, people generally wear two layers of clothes (a knitted vest and a knitted t-shirt) during the summer. It is essential to understand which types of innerwear and outerwear maximize comfort. The primary objective of this research is to investigate the influence of layering outerwear on innerwear, as well as the air gap between two layers, on thermal comfort properties.
Design/methodology/approach
In this study, a total of 12 combinations were created from four vest fabrics and three T-shirt fabrics. The thermal properties (thermal conductivity, thermal resistance, thermal absorptivity, thermal diffusion and peak heat flow) were evaluated for the individual inner and outer layers. Each inner layer was layered with an outer layer to observe the effect of layering on the thermal properties. An air gap of 2 mm was introduced between the inner and outer layers to study the effect of air gap on thermal properties.
Findings
Tencel fibre exhibits higher thermal conductivity and absorptivity than cotton and polyester. Upon layering an outer layer on an inner layer, the thermal conductivity and thermal absorptivity increase to a slight extent, thermal resistance and diffusion increase drastically and the peak heat flow reduces. With an air gap between the two layers, the thermal conductivity did not improve, the difference in thermal resistance among all the combinations reduced, the thermal absorptivity of the combination textiles was lower than that of the innerwear alone, the thermal diffusion increased and the peak heat flow diminished for all the combinations.
Practical implications
In practice, this comprehensive thermal comfort analysis provides specific combinations of inner and outer articles of clothing that are most appropriate for enhancing comfort during the summer season.
Originality/value
Though there are many studies on the effect of multilayer fabrics on thermal properties, no extensive research analyses the influence of innerwear and outerwear combinations on thermal comfort properties.
目的在日常生活中,人们在夏季一般会穿两层衣服(针织背心和针织 T 恤)。了解哪种类型的内衣和外衣能最大限度地提高舒适度至关重要。本研究的主要目的是调查外衣与内衣的叠穿以及两层衣服之间的空气间隙对热舒适性能的影响。分别对内外层的热性能(导热率、热阻、热吸收率、热扩散和峰值热流)进行了评估。每个内层都与外层分层,以观察分层对热性能的影响。在内层和外层之间引入 2 毫米的空气间隙,以研究空气间隙对热性能的影响。在内层上叠加外层后,导热系数和吸热系数略有增加,热阻和扩散急剧增加,热流峰值降低。如果两层之间有空气间隙,所有组合的热导率都没有提高,热阻的差异减小,组合纺织品的热吸收率低于单独的内层纺织品,热扩散增加,热流峰值减小。实用意义在实践中,这种全面的热舒适性分析提供了最适合提高夏季舒适性的内外装具体组合。原创性/价值虽然有许多关于多层织物对热性能影响的研究,但还没有广泛的研究分析内外衣组合对热舒适性的影响。
期刊介绍:
Addresses all aspects of the science and technology of clothing-objective measurement techniques, control of fibre and fabric, CAD systems, product testing, sewing, weaving and knitting, inspection systems, drape and finishing, etc. Academic and industrial research findings are published after a stringent review has taken place.