PSI - Issue 52

Hideaki Katogi et al. / Procedia Structural Integrity 52 (2024) 611–617 Hideaki Katogi / Structural Integrity Procedia 00 (2019) 000 – 000

613

3

2. Experimental method 2.1. Material and outdoor exposure test

The material was synthetic leather (SL120-SK, Nippon Chuko Co., Ltd.). The synthetic leather (front: polyurethane, back: polyester) can be used for raider suit of electronic personal mobility. Fig.1 shows surface of synthetic leather. The maximum test time of outdoor exposure test was one month. The start time was July 2022. The test place is Tokyo (Hino), Japan. The outdoor exposure test was conducted based on Japanese Industrial Standard (JIS) Z 2381. The test surface of specimen was front side. The average environmental temperature and humidity of test term were 27 °C and 79 %RH in Tokyo, Japan [24]. The UV index in Kanto region of Japan was about 7.3 [25] when the outdoor exposure test in Japan was conducted at July 2022. Fig. 2 shows stand for outdoor exposure test.

Fig. 1. Synthetic leather (a) front side; (b) back side.

Fig. 2. Stand for outdoor exposure test of synthetic leather.