Less Frictional Skin Feels Softer in a Tribologically Paradoxical Manner

Arakawa, Naohisa; Saito, Naoki; Okamoto, Shogo

doi:10.1109/access.2022.3175875

Cited by 7 publications

(4 citation statements)

References 41 publications

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“…Several previous studies [25, 26] did experiments to confirm which physical stimuli affect the perception of softness during pressing and to show how hardness and elasticity parameters affect the perceived softness. A previous study [27] showed the possibility that friction affects the perceived softness during rubbing. Thus, tactile perceptions of skin might differ depending on the country or culture with regards to words with the same lexical meanings.…”

Section: Discussionmentioning

confidence: 99%

Talk to us about your skin: The relationship between spoken language and haptic exploratory procedures

Arakawa,

Watanabe,

Fukushima

et al. 2024

Intern J of Cosmetic Sci

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ObjectiveTo enhance satisfaction, the cosmetics industry needs to clearly understand consumers' descriptions of their key tactile preferences. It is difficult for researchers to understand verbal descriptions from people whose native language is different from their own. Previous research has implied that some sensory words with the same lexical meanings have been observed in different haptic exploratory procedures (HEPs). Therefore, our study aims to investigate and understand the key tactile perceptions of people from five different countries based on their descriptions and their HEPs.MethodsIn Experiment 1, 1545 participants living in the US, Japan, China, Italy, and Thailand described their major tactile perceptions as efficacy in skincare, and we analysed the frequency of each word used in their answers. In Experiment 2, we confirmed the task to observe HEPs for Chinese, Italian, and Thai participants. A total of 24 participants in China, 33 participants in Italy, and 30 participants in Thailand freely explored their faces with their hands and answered which side more closely matched the major tactile adjectives. Experts classified the observed HEPs into six classifications within two categories and three contact area sizes and investigated the cultural differences.ResultsMore than 2% of the Chinese, Italian, Thai, US, and Japanese participants described 33, 20, 29, 22, and 18 words, respectively, as efficacy in skincare. Verified words that described the major tactile perceptions in each native language had the same meanings as moistness, firmness, softness, smoothness, and so on. We could confirm the HEPs of these major feelings for the participants from each culture. Chinese and Thai participants' HEPs for moistness or softness were observed with a pressing movement. Conversely, Italian participants' HEPs for moistness or softness were observed with a rubbing movement.ConclusionThis study showed that words with the same lexical meanings evoked different HEPs. The results imply that different HEPs can provide different physical stimuli on the skin. Therefore, it is important to survey both objects and HEPs to better understand the tactile experience.

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Section: Discussionmentioning

confidence: 99%

Talk to us about your skin: The relationship between spoken language and haptic exploratory procedures

Arakawa,

Watanabe,

Fukushima

et al. 2024

Intern J of Cosmetic Sci

Self Cite

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“…Generally speaking, the friction coefficient of soft objects with lower elastic modulus and hardness is greater than that of hard objects with higher elastic modulus and hardness. Arakawa et al used some powders to coat the skin, like materials made of PU, and then conducted the psychophysical experiments [13]. However, they found that for surfaces with the same elastic modulus, the lower the friction coefficient, the better the soft feel.…”

Section: Formation Mechanisms and Influencing Factors Of Soft Feelmentioning

confidence: 99%

“…Considering that soft feel, as a manifestation of the value of an item, is usually determined by the subjective sensory evaluation of consumers and has the drawbacks of being time-consuming and costly, Hashim et al were inspired by human perceptual flow and Generally speaking, the friction coefficient of soft objects with lower elastic modulus and hardness is greater than that of hard objects with higher elastic modulus and hardness. Arakawa et al used some powders to coat the skin, like materials made of PU, and then conducted the psychophysical experiments [13]. However, they found that for surfaces with the same elastic modulus, the lower the friction coefficient, the better the soft feel.…”

Section: Formation Mechanisms and Influencing Factors Of Soft Feelmentioning

confidence: 99%

Soft Feel Material Coatings on the Surface of Plastic Products and Their Application Prospects in the Popular Fields: A Review

Jiang,

Xu,

Zhang

et al. 2024

Coatings

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Soft-feel material (mainly polyurethane (PU), silicone rubber (SR), and polyacrylic acid (PAA), etc.) coatings can overcome the drawbacks of common plastic products such as acrylonitrile butadiene styrene copolymer (ABS), polycarbonate (PC), and polypropylene (PP), which have cold, hard, and bright surfaces, achieving warm, soft, and matte effects, thus greatly improving the quality and price level of the products. Although these coating materials can partially meet the main requirements of the soft feel effect, their comprehensive properties, such as mechanical performance, weather resistance, and foul resistance, still have shortcomings and need to be improved. Besides, there is a lack of in-depth exploration in the literature on the design philosophy and preparation strategies of soft-feel materials. Starting from the mechanism of producing this comfortable feeling and then systematically exploring their application in popular fields with high economic added value, such as mobile phone cases, electronic cigarette cases, cosmetic containers, etc., this article attempts to systematically and meticulously review the research and development progress in the related fields in recent decades and tries to provide an open outlook on their future development directions, e.g., the employment of surface engineering and hybrid materials. This review is expected to provide some rational thinking directions and convenient practical guidance for the rapid and healthy development of soft-feel materials in the research and application fields.

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“…When a finger slides over an object's surface, the friction force and its fluctuation are affected by the softness of the object [8][9][10][11]. Further, when people explore soft objects, they adopt sliding motions as well as the pushing motion [12][13][14]. Based on the relationship between friction and compliance, our research team controlled the friction force on a flat panel and presented softness perceptions [6,7].…”

Section: Introductionmentioning

confidence: 99%

Response Surface of Softness Perceived via Frictional Tactile Stimuli on Flat Touch-display

KIM,

OKAMOTO,

MARUYAMA

2024

ISASE

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An electrostatic frictional tactile display is used to present softness on a rigid flat-panel display. The display controlled the friction force of a finger sliding on it. However, the effects of representative stimulus parameters, those are, the finger's sliding velocity and wavelength which determined the spatial change of friction on the panel, are unknown, whereas the low-frequency fluctuation of surface friction is known to be important for softness presentation. This study experimentally specified the response surface of subjective softness as a function of the stimulus wavelength and finger's sliding velocity, involving ten participants. Consequently, the response surface was established, with a local maximum at the wavelength and sliding velocity of 10.55 mm and 198.6 mm/s, respectively. This stimulus condition was considered effective for the softness presentation.

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Less Frictional Skin Feels Softer in a Tribologically Paradoxical Manner

Cited by 7 publications

References 41 publications

Talk to us about your skin: The relationship between spoken language and haptic exploratory procedures

Talk to us about your skin: The relationship between spoken language and haptic exploratory procedures

Soft Feel Material Coatings on the Surface of Plastic Products and Their Application Prospects in the Popular Fields: A Review

Response Surface of Softness Perceived via Frictional Tactile Stimuli on Flat Touch-display

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