Effects of hip protective clothing on thermal wear comfort of clothing ensembles

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Wiah Wardiningsih ◽  
Olga Troynikov
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Protective Clothing ◽  
Thermal Manikin ◽  
Content Type ◽  
Wear Comfort ◽  
Ensemble Performance ◽  
Clothing Style ◽  
Thermal Wear ◽  
Moisture Vapour

Purpose This paper aims to examine the influence of hip protective clothing on ensemble performance attributes related to thermal comfort. It also explores the effect on protective pads of various materials and the arrangements of material. The thermal comfort characteristics are thermal insulation and moisture vapour resistance. Design/methodology/approach For this research, four ensembles of clothing were used: one ensemble without hip protective clothing and three ensembles with hip protective clothing. A thermal manikin was used to test the thermal insulation and moisture vapour resistance of the ensembles. Findings The findings revealed that incorporating hip protective clothing into the clothing ensembles influenced the thermal resistance and moisture vapour resistance of the ensemble. In the “all zones group,” the influence of the hip protective clothing depended on clothing style, with hipster-style clothing producing insignificant changes. In the “hip zones group” and “stomach and hip zones group,” hip protective clothing strongly influenced the thermal comfort attributes of ensembles. Pad material and volume play important roles in these changes in thermal comfort attributes. Originality/value These outcomes are useful for the design and engineering of hip protective clothing, where maximizing protection while minimizing thermal and moisture vapour resistance is critical for wear comfort and adherence in warm or hot conditions. The designer should consider that material, volume and thickness of protective pad affect the overall thermal comfort attributes of the hip protective clothing.

Effects of athletic T-shirt designs on natural ventilation

2016 ◽  
Vol 20 (2) ◽  
pp. 112-123 ◽  
Author(s):  
Chupo Ho ◽  
Jintu Fan ◽  
Edward Newton ◽  
Raymond Au
Keyword(s):  
Thermal Insulation ◽  
Moisture Transfer ◽  
Design Method ◽  
Air Gap ◽  
Thermal Manikin ◽  
Heat And Moisture Transfer ◽  
Content Type ◽  
Heat And Moisture ◽  
Air Circulation ◽  
Moisture Vapour

Purpose Maintaining air circulation between the wearer and garment layer is crucial for activating heat and moisture transfer from the body. If an air gap is trapped, air circulation may become ineffective and the ventilation of the garment is, thus, hindered. To maintain and extend the air gap, this study aims to propose a design method that involves placing spacer blocks underneath the garment to prevent the fabric from clinging directly to the skin. Design/methodology/approach To study the application of this design method, a series of T-shirts were produced and tested using a thermal manikin in standing and walking postures. All the T-shirts were made of fabric ostensibly manufactured to have high air permeability. Porous mesh fabric was used to construct the vented panels on the T-shirts. The test was conducted in a chamber with controlled temperature, relative humidity and wind velocity. Total thermal insulation (Rt) and moisture vapour resistance (Ret) were measured. Findings The test results showed that extension of the air gap between wearer and fabric provided higher ventilation to the wearer if the vented panels were also present on the T-shirts. Different placements of the vented panels on the T-shirts also affected the heat and moisture transfer from the thermal manikin. Research limitations/implications Due to limited resources, the evaluation of total thermal insulation and moisture vapour resistance was based on the testing result from a thermal manikin instead of any subjective wearer trial. Practical implications This research can contribute to the clothing designer who is developing function wear for a better ventilation. Social implications This research can contribute to the clothing designer who is developing function wear for a better ventilation. Originality/value This study aimed to further develop a new design concept in T-shirt design by improving the construction of the spacer blocks. Fabric with higher air and water vapour permeability was used to determine to what extent this design method is applicable to higher performance on heat and moisture transfer.

Effects of wind direction on sportswear thermal insulation with various ease allowance

2016 ◽  
Vol 28 (4) ◽  
pp. 492-502 ◽  
Author(s):  
Shurong Hu ◽  
Mengmeng Zhao ◽  
Jun Li
Keyword(s):  
Surface Temperature ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
Wind Direction ◽  
Future Research ◽  
Thermal Manikin ◽  
Thermal Imager ◽  
Content Type ◽  
The Difference ◽  
Ease Allowance

Purpose – The purpose of this paper is to explore the effects of wind direction and ease allowance on thermal comfort in sportswear. Design/methodology/approach – The effects of wind direction (front, side, back and calm (no wind) 1.5 m/s) and seven magnitudes of ease allowance on sportswear thermal insulation and surface temperature were investigated. An 11 zones’ thermal manikin was used to acquire the static thermal insulation. Surface temperature was captured by a thermal imager. Findings – The results showed that the wind was a significant effect on thermal performance, however, wind direction effect was only significant in the segment covered with multilayer fabric, such as the abdomen and hip (p=0.034). Although the ease allowance influenced the overall thermal insulation obviously, the difference between seven sizes suits was not significant. Nevertheless, the ease allowance affected the surface temperature of chest and back significantly (p=0.023, 0.007). Correlation between thermal insulation and surface temperature was negative, and correlation level was degraded when affected by wind factor. Research limitations/implications – Sportswear’s fabric and style did not discussed as effect factors. It would be taken into accounted in the future research. Originality/value – Wind direction impact thermal comfort in multilayer regions significantly. It is a reference to improve sportswear’s comfort design.

scholarly journals 4788 Thermal Manikin Measurements of Protective Clothing Assemblies

2018 ◽  
Vol 26 (1(127)) ◽  
pp. 200-209 ◽  
Author(s):  
Iwona Frydrych ◽  
Iwona Frydrych ◽  
Agnieszka Cichocka ◽  
Paulina Gilewicz ◽  
Justyna Dominiak
Keyword(s):  
Thermal Comfort ◽  
Thermal Insulation ◽  
Protective Clothing ◽  
The Body ◽  
Thermal Manikin ◽  
Dynamic Conditions ◽  
Comparison Of Results ◽  
Number Of Layers ◽  
Foundry Worker

The thermal comfort of a foundry worker is very important and related to many factors, i.e., the structure of the protective clothing assembly, the number of layers and their thickness, as well as the distance between the body and appropriate underwear. The research undertaken aimed at checking thermal insulation for assemblies consisting of aluminized protective clothing and appropriate underwear in two sizes and without underwear. Measurements of the clothing thermal insulation were conducted using a thermal manikin dressed in two-layer protective clothing and three kinds of underwear products covering the upper and lower parts of the manikin. The first part of the paper presents a comparison of results of thermal insulation measurement of two kinds of protective clothing: a traditional one made of aluminised glass fabrics and a new one made of aluminised basalt fabrics. Each of the protective clothing was worn on three kinds of underwear products in m and s sizes. The influence of the underwear size was noted. In the second part of paper, measurements were made for two aluminized basalt clothing variants: commercial and a prototype with modifications in static and dynamic conditions. The results were discussed.

Investigation on thermal comfort of the uniform for workers in tropical monsoon climates

2020 ◽  
Vol 32 (6) ◽  
pp. 849-868
Author(s):  
Jingxian Xu ◽  
Huijuan Liu ◽  
Yunyi Wang ◽  
Jun Li
Keyword(s):  
Heat Transfer ◽  
Thermal Comfort ◽  
Dynamic Condition ◽  
Thermal Manikin ◽  
Content Type ◽  
Wind Speeds ◽  
Subjective Perceptions ◽  
Tropical Monsoon ◽  
Four Levels ◽  
Thermal Insulations

PurposeThis study aims to investigate the heat transfer mechanism of the uniforms used by people working in hot, humid and windy environments. Furthermore, the effectiveness of an opening structure added to the armpit of the uniforms in improving thermal comfort was comparatively examined.Design/methodology/approachA set of uniforms was tested with the opening at the armpit alternatively zipped or unzipped. Thermal manikin and human tests were performed in a climatic chamber simulating the specific environmental conditions, including wind speeds at four levels (0.15, 0.5, 2, 4 m/s) and relative humidities at two levels (50 and 85%). Static and dynamic thermal insulations of clothing (IT) were examined by the thermal manikin tests. The human bodies' thermal responses, including heart rates (HR), eardrum temperatures (Te), skin temperatures (Tsk) and subjective perceptions, were given by the human tests.FindingsSpecial mechanisms of heat transfer in the specific uniforms used in tropical monsoon climates were revealed. Reductions on IT were caused by the movement of the human body and the environmental wind, and the empirical equations would underestimate this reduction. The opening at the armpit was able to prompt more heat transfer under dynamic condition, with reducing the IT by 11.8%, lowering the mean Tsk by 0.92°C, and significantly improving the subjective perceptions (p < 0.05). The heat exhaustion was alleviated with lowering the Te by 0.32°C.Originality/valueThis study managed to improve the thermal performance of uniforms for workers under unforgiving conditions. The evaluation and design methods introduced by this study provided practical guidance for similar products with strict dress codes and cost control requirements based on the findings from thorough product tests and analysis.

Effects of Clothing Ventilative Designs on Thermal Insulation under Varying Wind Conditions

2011 ◽  
Vol 332-334 ◽  
pp. 1927-1930 ◽  
Author(s):  
Xiang Hui Zhang ◽  
Jun Li
Keyword(s):  
Experimental Investigation ◽  
Thermal Comfort ◽  
Thermal Insulation ◽  
The Body ◽  
Thermal Manikin ◽  
Clothing Insulation ◽  
Vertical Side ◽  
Wind Velocities ◽  
Heat And Moisture ◽  
Body Heat

This paper reports on an experimental investigation of the effects of clothing ventilative designs on thermal comfort measured in terms of thermal insulation. Eight T-shirts with varying areas and locations of mesh fabric were designed and produced for testing on a dry thermal manikin. Clothing thermal insulation of T-shirts was measured under three wind velocities: 0.5, 1 and 2m/s. The results showed that, the areas and locations of ventilation panels affect the total thermal insulation. The T-shirts with larger area of mesh fabric are preferable in terms of releasing more body heat. Among various designs tested, mesh fabrics applied at two vertical side seams can most effectively release heat and moisture from the body. Clothing insulation is also greatly affected by wind.

scholarly journals Thermal comfort sustained by cold protective clothing in Arctic open-pit mining—a thermal manikin and questionnaire study

2017 ◽  
Vol 55 (6) ◽  
pp. 537-548 ◽  
Author(s):  
Kirsi JUSSILA ◽  
Sirkka RISSANEN ◽  
Anna AMINOFF ◽  
Jens WAHLSTRÖM ◽  
Arild VAKTSKJOLD ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Protective Clothing ◽  
Open Pit ◽  
Questionnaire Study ◽  
Open Pit Mining ◽  
Thermal Manikin

scholarly journals Characteristics of Specialised Firefighter Clothing Used in Poland – the Thermal Parameters

2020 ◽  
Vol 28 (1(139)) ◽  
pp. 65-70
Author(s):  
Magdalena Młynarczyk
Keyword(s):  
Thermal Insulation ◽  
Protective Clothing ◽  
Thermal Parameters ◽  
Thermal Manikin ◽  
Test Results ◽  
Evaporative Resistance ◽  
Different Types ◽  
Local Thermal Insulation ◽  
Materials Used ◽  
The Impact

This paper describes the characteristic thermal parameters of firefighters’ personal protective clothing (FFPPC) used in Poland. The total thermal insulation and evaporative resistance of three different types of FFPPC were measured and used on a thermal manikin. Next, the results were compared. Based on the analyses and calculations of the test results, it was shown that FFPPC provides a barrier to the heat exchange between the user and the surrounding environment. Differences in the local thermal insulation can be triggered not only by the material used but they can also be attributable to clothes fitted on the manikin. The biggest differences can be noted on the segments forming part of the manikin’s trunk. No difference was found in the evaporative resistance between the clothes tested. In order to examine further the impact of the materials used on thermal parameters of protective clothing, it is necessary to carry out an analysis of the impact of individual layers.

scholarly journals Thermal Properties of Special New Generation Personal Protective Clothing for Firefighters-Rescuers

2021 ◽  
Vol 1 (80) ◽  
pp. 45-67
Author(s):  
Marzena Rachwał ◽  
Małgorzata Majder-Łopatka ◽  
Tomasz Węsierski ◽  
Artur Ankowski ◽  
Magdalena Młynarczyk ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Thermal Insulation ◽  
Protective Clothing ◽  
Body Shape ◽  
Thermal Protection ◽  
Thermal Manikin ◽  
Protective Equipment ◽  
Everyday Work ◽  
New Generation ◽  
Full Body

Every day, firefighters put their health and life at risk by saving people and their property not only during fires, but by being always ready during all kinds of unfortunate events. Therefore, they need special personal protective equipment, including protective clothing. The purpose of the study was to compare thermal properties of new (PROTON and SYRIUSZ) and old (US-03) personal protective clothing for firefighters. Measurements of thermal insulation (total, effective and local) were carried out using a full body shape thermal manikin Newton consisting of 34 segments, in which temperature and heat flux were controlled independently. Results of the total thermal insulation of the entire clothing reveal differences between all three models. The lowest values were noticed for the model PROTON with light and shorter jacket and the highest values of thermal insulation for the new model SYRIUSZ, indicating that this model protect the user against heat most effectively. New models of personal protective clothing for firefighters should be recommended for use in everyday work, because they are characterized by better parameters than the previous type of protective clothing, both in terms of thermal protection and mobility.

Thermal insulations of multilayer clothing systems measured by a bench scale test in low level heat exposures

2014 ◽  
Vol 26 (5) ◽  
pp. 412-423 ◽  
Author(s):  
Ming Fu ◽  
Wenguo Weng ◽  
Hongyong Yuan
Keyword(s):  
Thermal Radiation ◽  
Thermal Insulation ◽  
Protective Clothing ◽  
Air Gap ◽  
Content Type ◽  
Low Level ◽  
Bench Scale ◽  
Scale Test ◽  
Fabric Layer ◽  
Bench Scale Test

Purpose – The purpose of this paper is to measure the thermal insulation of protective clothing with multilayer gaps in low-level heat exposures. Design/methodology/approach – Nine different combinations of protective clothing systems with multiple air gaps are used to measure the thermal insulation by a self-designed bench-scale test apparatus in different levels of an external thermal radiation of 2-10 kW/m2. The outside and inside surface temperatures of each fabric layer are also measured to calculate the local thermal insulation of each fabric layer and each air gap. Findings – The results show that the total thermal insulation of protective clothing under thermal radiation is less than that in normal environments, and the exposed thermal radiation will worsen the total thermal insulation of the multilayer fabric systems. Air gap plays a positive role in the total thermal insulation, and thus provides the enhanced thermal protection. It is also suggested that the local resistance of the air gap closer to the external thermal radiation is more easily affected by the thermal radiation, due to the different heat transfer ways in the fabric system and the external thermal radiation. Originality/value – Effects of air gap on the thermal insulation of protective clothing, and contribution of the local thermal resistance of each fabric layer and each air gap to the total thermal insulation.

Development and trial of athletic T-shirt using spacer blocks to enhance ventilation

2017 ◽  
Vol 29 (5) ◽  
pp. 706-715
Author(s):  
Chu Po Ho ◽  
Jintu Fan ◽  
Edward Newton ◽  
Raymond Au
Keyword(s):  
Skin Surface ◽  
Air Gap ◽  
Comfort Level ◽  
Treadmill Running ◽  
Thermal Manikin ◽  
Design Development ◽  
Content Type ◽  
Air Ventilation ◽  
Ventilation Performance ◽  
Moisture Vapour

Purpose In previous studies, enlarging the air gap between fabric and the skin through the placement of spacer blocks has been proven to improve air ventilation, particularly when the pumping effect is activated during movement. These studies evaluated only the total thermal insulation (Rt) and moisture vapour resistance (Ret) by using a fabric thermal manikin. The purpose of this paper is to report the experience, perceived comfort level, and ventilation effect of two designed T-shirts in a wearer trial. Design/methodology/approach An athletic T-shirt (Vented Design) was designed by attaching spacer blocks to the underside of the fabric to enlarge the air gap. Eight subjects participated in the wearer trial, which comprised 30 min treadmill running, followed by 10 min of rest. At different points during the 40 min test period, subjects rated their body coolness, skin dryness, and overall comfort of the designed T-shirt. The testing was repeated with participants wearing the same T-shirt but without spacer blocks, which served as a control garment. The mean skin temperature of each subject was also measured to support survey findings. Findings The data were evaluated using independent t-tests. The T-shirt with spacer blocks provided higher ventilation than the control T-shirt after 10 min of running. Research limitations – because of limited resources, only eight subjects were recruited to this study. In addition, more T-shirt designs should be tested in the future to elucidate how T-shirt design affects ventilation performance. Originality/value This study investigated a T-shirt design wherein the air gap between the skin surface and fabric was increased. The results of the wearer trial showed that this design could be adopted as a design brief for further design development of related clothing. This study has implications for clothing designers developing functional clothing with improved ventilation.

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