Effect of knitting structure and yarn composition on thermal comfort properties of bi-layer knitted fabrics

Yang, Yang; Yu, Xin; Chen, Liqun; Zhang, Peihua

doi:10.1177/0040517520932557

Cited by 43 publications

(40 citation statements)

References 44 publications

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“…The use of different material arrangements in sleeping bags has increased in recent years, allowing them to be used in a variety of conditions while maintaining comfort. The use of the most modern textile science and technology in the production of this type of materials is developing every day [ 12 , 13 , 14 ]. Winter sleeping bags must provide adequate thermal insulation, as well as protection against weather conditions, while summer sleeping bags must—oppositely—provide lower thermal insulation; therefore, different composition of raw materials should be considered.…”

Section: Introductionmentioning

confidence: 99%

Study of Influence of Atmospheric Conditions on the Thermal Properties of Sleeping Bags

2022

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The thermal properties of clothing products are influenced by external environmental parameters, such as temperature, humidity, air flow and parameters related to the user’s body, which mainly include temperature and humidity. Depending on the type of raw material, its thickness and the material manufacturing technique, clothing products are characterised by certain insulating properties to protect the human body from external factors. A multilayer system made of different material groups can change the thermal insulating capacity significantly, which cannot be determined by the testing of individual layers used in the production. In order to determine the influence of weather conditions on thermal insulation and air permeability, tests were carried out for two types of sleeping bags (summer and autumn) produced by the same manufacturer, differing in insulation thickness. Simulations were carried out using SolidWorks and verified using a Newton thermal mannequin. During tests, both the temperature (range from −20 °C to 20 °C) and humidity values were changed (range 40–80% humidity). For sleeping bags, the effective thermal insulation decreases along with the increase of temperature and decrease of humidity. It can be observed, for the autumn sleeping bags, that for a temperature of 20 °C and humidity of 60%, the thermal insulation is 1.063 m2·K·W−1, while for a temperature of −20 °C and humidity of 60% thermal insulation increases significantly and amounts to 1.111 m2·K·W−1. A similar situation occurs for the effective thermal insulation of a summer sleeping bag (20 °C/60% thermal insulation is 0.794 m2·K·W−1, while for −20 °C/60%—0.851 m2·K·W−1. During the tests, the humidity and temperature between the layers of the clothing system were also controlled, in order to learn more about the influence of these parameters on the thermal insulation properties of the sleeping bags.

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Section: Introductionmentioning

confidence: 99%

Study of Influence of Atmospheric Conditions on the Thermal Properties of Sleeping Bags

2022

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“…Mbise et al found that the hydrostatic pressure difference between the two layers of spacer fabric is one of the factors affecting moisture transfer [8]. A studies on the effect of yarn composition and knitting structure on bi-layer knitted fabrics [36]; a comparative study of eri-silk, wool, and bamboo knitted fabrics [37]; and a study of 100% eri-silk for active sportswear applications [38] have previously been conducted. The air permeability, water vapor permeability, thermal conductivity, wicking, and drying ability of bi-layer knitted fabric made up of polypropylene as the inner layer and modal as the outer layer with one tuck point of repeat were found to be higher when compared to other bi-layer, plated, and single jersey structures [6].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Physiological Comfort Properties of Sportswear with Different Combination of Inner and Outer Layers

et al. 2021

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Consumers expect high-performance functionality from sportswear. To meet athletic and leisure-time activity requirements, further research needs to be carried out. Sportswear layers and their specific thermal qualities, as well as the set and air layer between materials, are all important factors in sports clothing. This research aims to examine the thermal properties of sports fabrics, and how they are affected by structure parameters and maintained with different layers. Three inner and four outer layers of fabric were used to make 12 sets of sportswear in this study. Before the combination of outer and inner layers, thermal properties were measured for each individual layer. Finally, the thermal resistance, thermal conductivity, thermal absorptivity, peak heat flow density ratio, stationary heat flow density, and water vapor permeability of bi-layered sportswear were evaluated and analyzed. The findings show that sportswear made from a 60% cotton/30% polyester/10% elastane inner layer and a 100% polyester outer layer had the maximum thermal resistance of 61.16 (×103 K·m2 W−1). This performance was followed by the sample made from a 90% polyester/10% elastane inner layer and a 100% polyester outer layer, and the sample composed of a 100% elastane inner layer and a 100% polyester outer layer, which achieved a thermal resistance value of 60.41 and 59.41 (×103 K·m2 W−1), respectively. These results can be explained by the fact that thicker textiles have a higher thermal resistance. This high-thermal-resistance sportswear fabric is appropriate for the winter season. Sportswear with a 90% polyester/10% elastane inner layer had worse water vapor resistance than sportswear with a 60% cotton/30% polyester/10% elastane and a 100% elastane layer. Therefore, these sports clothes have a higher breathability and can provide the wearers with very good comfort. According to the findings, water vapor permeability of bi-layered sportswear is influenced by geometric characteristics and material properties.

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“…Fabrics with many large pores breathe better than fabrics with few and small holes. 16 The thermal physiological properties are defined as wearing comfort in terms of thermal and moisture transfer effects, which can be assessed by thermal resistance and water vapor resistance. 17 Water vapor resistance has been described as the ability of clothing to allow the transmission of moisture vapor by diffusion, depending on air permeability.…”

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“…For example, bilayer knitted fabrics, in which the inner face made up of polypropylene or polyester filament has good capillary action and the outer face made from a hydrophilic yarn allows high absorption, have a better moisture management property to achieve a high level of clothing comfort. 16,22…”

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Analysis of thermal and wet comfort properties of hygroscopic and exothermic knitted fabrics

Gao

Cui

Yao

et al. 2022

Textile Research Journal

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Clothing thermal and wet comfort relates to the heat and moisture transport properties of clothing as one of the most important factors in determining whether or not a garment is desirable to customers. It is important to develop winter textiles by optimally combined technology of hygroscopic heat generation and moisture management to maintain warm dry skin for the active wearer. In this work, six multilayer hygroscopic and exothermic fabrics made up of different functional yarn compositions were designed and fabricated based on ergonomic principles. Their thermal wet comfort properties were investigated compared with seven plain knitted fabrics. Air permeability, moisture management characteristics, thermal physiological properties, and hygroscopic heat generation performances were used to assess thermal and wet comfort properties. Their correlations with yarn composition were explored. Multilayer knitted fabrics with a designed knitted structure and wettability gradient demonstrated evenly hygroscopic exothermic properties and excellent directional moisture transport performances. This has the potential to reduce the phenomena of high temperature and heat concentration following moisture absorption The fabric made up of profiled polyester and a low proportion of cotton blend as an inner layer and a high proportion of modified polyacrylate and viscose blend as a middle layer was verified to have superior moisture management characteristics and evenly hygroscopic exothermic properties.

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Effect of knitting structure and yarn composition on thermal comfort properties of bi-layer knitted fabrics

Cited by 43 publications

References 44 publications

Study of Influence of Atmospheric Conditions on the Thermal Properties of Sleeping Bags

Study of Influence of Atmospheric Conditions on the Thermal Properties of Sleeping Bags

Thermo-Physiological Comfort Properties of Sportswear with Different Combination of Inner and Outer Layers

Analysis of thermal and wet comfort properties of hygroscopic and exothermic knitted fabrics

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