Effect of Outdoor Exposure on Tensile Property of Synthetic Leather for Personal Mobility

Recently, the electronic personal mobility has been focused for sustainable development goals. The synthetic leather is used as rider suit of personal mobility for comfort. But, the damage of rider suit using synthetic leather will be occurred under outdoor exposure environment. So, this study was examined the effect of outdoor exposure environment on tensile property of synthetic leather (front: polyurethane, back: polyester) for durability of raider suit of personal mobility. The maximum test time of outdoor exposure test was one month (start time: July 2022, test place: Japan (Hino, Tokyo)). The outdoor exposure test was conducted based on Japanese Industrial Standard (JIS) Z 2381. The test surface was front side. Before and after outdoor exposure tests, static tensile tests of synthetic leathers were conducted based on JIS K 6552. Test temperature and humidity were room temperature and 65%RH, respectively. As a result, tensile property of synthetic leather decreased after outdoor exposure test. Generally, the tensile property of polyurethane decrease with an increase of test time. The constituent material on surface of synthetic leather was probably degraded by ultraviolet irradiation. Therefore, tensile property of synthetic leather for personal mobility was mainly affected by ultraviolet irradiation under outdoor exposure environment.