Affiliations: [a] Shiseido Research Center, Hayabuchi, Tsuzuki-Ku, Yokohama, Kanagawa, Japan | [b] Graduate School of Biomedical Engineering, Tohoku University, Miyagi, Japan | [c] Graduate School of Engineering, Tohoku University, Miyagi, Japan | [d] Ofuna Plant, Denki Kagaku Kogyo Kabushiki Kaisha, Dai, Kamakura, Kanagawa, Japan
Correspondence:
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Corresponding author: Minori Kakizawa, Shiseido Research Center, 2-2-1, Hayabuchi, Tsuzuki-Ku, Yokohama, Kanagawa 224-8558, Japan. E-mail:[email protected]
Abstract: Tactile sensation of hair such as moist and smooth is
usually evaluated by touching the surface of hair and it is essential
element for evaluating hair condition. However, the use of words and
evaluation by people lack precision because there are individual variations
in the hair condition and one's sense of value. The sensor which measures
frictional vibration when rubbing the surface of hair with a polyvinylidene
fluoride (PVDF) film was developed for measuring tactile sensation of hair.
Artificial hairs were also developed for minimizing individual variations of
hair condition. In this study, the sensor outputs were compared with
artificial hairs with various tactile sensations which were characterized by
factor analysis. Results showed that the sensor outputs were correlated with
the factor scores of the artificial hairs. In addition, the sensor outputs
were also correlated with fiber fineness and the amount of the surface
coating of the artificial hairs. The evaluation using the sensor was found
to be useful for both evaluating the hair condition and the tactile
sensation of hair.
