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Analysis of Factors Affecting Thermal Comfort Properties of Woven Compression Bandages

100%

Aboalasaad A. R. R. , Skenderi Z. , Kolčavová S. B. , Khalil A. A. S.

tom Vol. 20, no. 2

178--185

Compression bandage (CB) as a porous material should provide both graduated pressure and thermal comfort properties to enable air permeability, heat transfer, and liquid perspiration out of the human body. The main factors affecting thermal comfort properties are the temperature difference between environment and skin, yarns’ structure and material, fabric thickness, porosity, areal density, number of fabric layers, trapped air, and fabric structure. Thermal resistance (Rct) and water vapor resistance (Ret) are evaluated for four types of woven CBs. All bandage types were applied at the range of extension (10–80%) using both two- and three-layer bandaging on thermal foot model (TFM). Rct values are compared with measured results by the Alambeta instrument, whereas Ret test is performed on the Permetest device. Thermal resistance is significantly decreased when increasing the bandage extension from 10 to 40%, then it is slightly increased by increasing the extension from 40 to 60%, after that it is decreased especially at 80% extension due to lower bandage thickness and higher compression.

Thermographic Assessment of Sweat Evaporation inside Clothing Systems

100%

Mijovic B. , Salopek Cubric I. , Skenderi Z. , Reischl U.

Fibres & Textiles in Eastern Europe

2012

tom Vol. 20, no. 5 (94)

81--86

The purpose of the research project was to determine whether or not thermography can be used for assessing heat and moisture transport inside clothing systems worn by active duty police officers. An infrared camera system was used to identify temperature patterns over the body of healthy adult males performing controlled physical activities inside a temperature controlled environment. The thermographic documentation revealed complex temperature distribution patterns that were clearly associated with the regional evaporative cooling of sweat. Differences in the temperature patterns between subjects who produced large amounts of sweat and those who produced less sweat were observed. The study showed that thermography is an effective tool for assessing skin temperatures and sweat evaporation from clothing. The information gained can be applied to the design of new clothing systems to maximize the cooling effects of body sweat evaporation.

Celem badań było sprawdzenie czy metoda termograficzna umożliwia określenie transportu ciepła i pary wodnej poprzez warstwy odzieży. Zastosowano kamerę termowizyjną dla oceny rozkładów termicznych ubrań noszonych przez grupę zdrowych mężczyzn. Uzyskano rozkłady temperatur korelujące z efektem chłodzenia w wyniku wydzielania potu przez osoby testowane. Stwierdzono, że termografia jest odpowiednią metodą dla określenia rozkładu temperatury i obszarów wydzielania potu. Wyniki mogą być wykorzystane dla opracowania odpowiedniej konstrukcji ubiorów zapewniających optymalne chłodzenie ciała.

Theoretical and Experimental Evaluation of Thermal Resistance for Compression Bandages

88%

Aboalasaad A. R. , Sirková B. K. , Mansoor T. , Skenderi Z. , Khalil A. S.

tom Vol. 22, no. 1

18--25

The objective of this paper is to report a study on the prediction of the steady-state thermal resistance of woven compression bandage (WCB) by using three different mathematical models. The experimental samples of WCB were 100% cotton, cotton–polyamide–polyurethane, and viscose–polyurethane. The bandage samples were evaluated at extensions ranging at 10–100%, with two- and three-layer bandaging techniques. Experimental thermal resistance was measured by thermal foot manikin (TFM) and ALAMBETA testing devices. The obtained results by TFM and ALAMBETA were validated and compared with the theoretical models (Maxwell–Eucken2, Schuhmeister, and Militky), and a reasonable correlation of approximately 78%, 92%, and 93% for ALAMBETA and 75%, 82%, and 83% for TFM, respectively, was observed.