The effect of the transfer abilities of single layers on the heat and mass transport through multilayered outerwear clothing for cold protection

Abstract

This paper deals with performance properties related to human thermo-physiological comfort of three-layer textile systems used for the production of outerwear for cold protection. The transfer of heat and fluids through the compound single layers (woven and non-woven) is investigated and compared to the heat and mass transfer of the systems for clothing. Six characteristics are measured for both single layers and systems of layers: thermal resistance, air permeability, water vapor resistance, relative water vapor permeability, the accumulative one-way transport index and overall moisture management capacity. For each of the characteristics, regression analysis is applied to prove or reject the proposed mathematical dependencies between the transfer abilities of the single layers and the respective systems. The results obtained showed that the fluid transfer abilities of the single layers applied in clothing for cold protection strongly affect the fluid transfer ability of the system of layers, while the heat transfer of the system is dominated by the heat transfer ability of the thermo-insulating layer. The proposed approach for assessment of the transfer processes through a system of layers for the production of outerwear for cold protection could be successfully applied in the design of other textile and clothing items, produced by using systems of different textile layers.

Studying the impact of multilayer fabric on the characteristic of temperature distribution under the influence of fire

“…Research in the field of heat transmission through individual textile layers-as opposed to clothing systems protecting against cold, in which the insulating layer is a nonwoven fabric-has shown that thermal insulation of the whole system is lower than the sum of the values for the individual layers. 11 Heat transportation through the system depends of the values of the layers' thermal insulation.…”

Mechanical and Thermal Properties of Polyurethane Materials and Inflated Insulation Chambers

“…Figures [12][13][14] give the linear regression equation and coefficients of determination describing the proportion of variance in the heat resistance that is predic from the pressure in the chamber. As can be seen from the figures, high values of the coefficient were characteristic for PICs C-0, C-1V, and C-2V at all three ambient temperatures (20 • C, 15 • C, and 10 • C).…”

“…At the same time, this batting caused an undesirable accumulation of moisture in the jacket, which led to a longer drying rate. Another group of scientists focused on the investigation of the transfer abilities (both heat and mass transport) of single layers through a multilayered system [ 13 ]. They measured six characteristics important for the classification of transfer properties.…”

Integrated cooling (i-Cool) textile of heat conduction and sweat transportation for personal perspiration management

“…State-of-the-art textiles for daily use are usually sufficiently good at water vapor transmission to ensure comfort at the mild state (See Supplementary Note 1 and Supplementary Figs. 1-2 for more discussion) 24 . Nevertheless, the cooling performance of conventional textiles is to be improved when human body is in more intense scenarios, such as moderate/profuse perspiration situations in which liquid sweat is inevitably present.…”