SPring-8, the large synchrotron radiation facility

　Sumitomo Rubber Industries, Ltd. (SRI) and Associate Professor Wataru Yashiro of the Institute of Multidisciplinary Research for Advanced Materials, Tohoku University’s (IMRAM) are pleased to announce that we have achieved an approximately thousand-fold increase in the speed of 4D-CT (4-Dimensional Computed Tomography) imaging thanks to collaborative research that brings together industry and academia. The 4D-CT technique involved in this research was originally developed by SRI as part of ADVANCED 4D NANO DESIGN, a proprietary New Materials Development Technology that the company first unveiled in 2015. The culmination of joint research between SRI that possesses extensive knowledge on rubber and Associate Professor Wataru Yashiro who possesses the world’s fastest^*1 CT imaging technology^*2, this breakthrough now makes it possible to observe rubber failure as it occurs during actual tire usage at varying speeds^*3.

　Since first unveiling ADVANCED 4D NANO DESIGN in 2015, SRI has actively utilized the core technology available at the SPring-8^*4 synchrotron radiation research facility to carry out new materials development, taking full advantage of 4D-CT imaging with the aim of improving rubber wear performance. However, up until now, it took several seconds to capture a single 3D image using the existing 4D-CT technique. Thus, in order to enhance the precision of imagery, there was a pressing need to increase the speed of imaging. And so, SRI and Tohoku University initiated joint research with the aim of developing the base technology to realize “High-Speed 4D-CT Imaging.” As a result of this research, we have succeeded in increasing the speed of imaging by approximately a thousand-fold, meaning that a 3D image can now be captured in around 1/100 of a second. This advancement allows for continuous, high-speed observation of rubber failure phenomena in three dimensions and under conditions that better approximate the state of tire rubber during actual wear. SRI plans to utilize this technology not only to accelerate the development of new tire materials to provide superior wear resistance, greater environmental friendliness and longer service life, but also to develop new materials in order to achieve further advancements in SMART TYRE CONCEPT, our forward-thinking concept for the development of tires and peripheral services.