Psychophysical Measurement of Wet and Clingy Sensation of Fabrics by the Volar Forearm Test

Tang, Ka-Po Maggie; Kan, Chi Wai; Fan, Jintu

doi:10.1111/joss.12161

Cited by 26 publications

(32 citation statements)

References 52 publications

(94 reference statements)

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“…We suggest that the hydrophilicity of cotton contributes to particularly large increase in friction by a factor of four on wet skin. A plausible mechanism suggested by Tang et al invokes the formation of an adhesive interface when water transfers from the wet arm to the hydrophilic cotton, while a water-film repelled from the hydrophobic polyester may act as lubricant [31]. We propose that these skin-textile interface effects, whose relative contribution becomes stronger when the external load is very low, lead to the observed strong increase in friction and eventually to a reduced comfort of garments worn during physical exercise.…”

Section: Resultsmentioning

confidence: 67%

Role of Hair Coverage and Sweating for Textile Friction on the Forearm

et al. 2020

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Friction of textiles on the human forearm is an important factor in comfort sensations of garments. We built an experiment to measure friction for textiles sliding on the forearm under loading conditions which are characteristic for wearing shirts or jackets. The hair coverage of the participants’ forearm was quantified by image analysis of photographs of the arm in the region of contact. Friction results for five standard textiles suggest to treat hair coverage in two classes. Sweating after physical activity leads to an increase of friction by factors of 2 to 5 for participants with less hairy forearms, while an increase by a factor of 1 to 1.7 only was found for participants with more hairy forearms. We introduce a method of wetting the forearm of study participants in a controlled way with water, which results in similar friction as for the sweating forearm after physical activity. The method allows for efficient studies of the role of skin moisture for friction including varying hair coverage of the skin.

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Section: Resultsmentioning

confidence: 67%

Role of Hair Coverage and Sweating for Textile Friction on the Forearm

et al. 2020

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“…The design of the driver was with reference to the experimental set-up of [25]. However, the driver built for this study moved two fabrics in phase on forearms of subjects.…”

Section: Methodsmentioning

confidence: 99%

Subjective wet perception assessment of fabrics with different drying time

Chau¹,

Tang²,

Kan³

2018

R. Soc. open sci.

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Wet perception involves a complex neurobiological mechanism and it is a crucial factor affecting the wear comfort in daily life. A subjective wet perception assessment was conducted against wetted fabrics. The assessment method was set to demonstrate the sensation felt by the wearer in recovery period after light activities, and assumes that there is no further sweat secretion. Twenty participants participated in the assessment. Participants were presented with fabrics dried with different duration for simulating garments dry during recovery period. A new fabric driver was built to simulate body movements during wear. The driver drove specimens and reference fabrics on participants' forearms. The two-arm configuration of the fabric driver helps to enhance the reliability of assessment results. The participants were asked to give wetness rating on each sample in ratio scale. We conclude that log10 of subjective wetness rating has linear relationship with drying time of fabric (DToF) and amount of water in fabric. A novel wetness factor (WF) is developed to quantify the effects of wet perception and exposure time induced by a drying fabric. WF is the area under curve of wetness rating against DToF. A smaller WF indicates that a user suffers less from wet sensation.

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“…The participant rated how wet they thought the fabric was using a visual analogue scale. All these studies applied certain levels of water to the testing samples, while Tang, Kan, and Fan (2015) used a syringe pump to supply water dynamically to samples at a constant speed until participants detected the wetness. Stimulus intensity tests (Kaplan & Okur, 2009; Sadikoglu, 2005) use a fixed amount of wet stimulus to determine the ability of the participant to provide a quantitative rating of the intensity of the stimulus, while threshold detection tests (Bergmann Tiest et al., 2012; Jeon, Yoo, & Kim, 2011) used an increasingly wet stimulus to determine the sensory threshold at which the participant detects the stimulus.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fiber Type, Water Content, and Velocity on Wetness Perception by the Volar Forearm Test: Threshold Detection Test

et al. 2020

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Two kinds of evaluation methods were applied to gain insight into how fabrics affect the perception of wetness under dynamic skin contact at different velocities. In a previous study, the stimulus intensity rating was tested by applying a fixed amount of water to fabric samples to determine the quantitative ratings for the intensity of the perception of wetness. In this study, the perceived threshold was determined by supplying water continually until the level of wetness was just-detectable. The results indicated positive correlations between the fabric coefficient of friction, the water spreading speed, and the wetness perception threshold, and there were negative correlations between fabric wetting time, skin cooling rate, and wetness perception threshold. However, no correlation between wetness threshold and maximum transient thermal flow (Qmax) was found in this study. The wetness threshold can be predicted by wetting time and coefficient of friction (R2 = .70, p < .001). The threshold detection was qualified to evaluate the sensitivity to wetness at the initial detection of moisture on the skin, while the stimulus intensity rating would give a better prediction at the moisture absorption stage. This study provided the evaluation technology for designing sportswear, leisurewear, and health-care products with desirable wetness levels.

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Psychophysical Measurement of Wet and Clingy Sensation of Fabrics by the Volar Forearm Test

Cited by 26 publications

References 52 publications

Role of Hair Coverage and Sweating for Textile Friction on the Forearm

Role of Hair Coverage and Sweating for Textile Friction on the Forearm

Subjective wet perception assessment of fabrics with different drying time

Effect of Fiber Type, Water Content, and Velocity on Wetness Perception by the Volar Forearm Test: Threshold Detection Test

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