From medical devices and automobiles to mobile phones and watches, flexible rubber parts play a crucial role in ensuring reliability and durability. Founded in the 1950s, Japan’s Sunarrow has grown to become a key player, becoming the first manufacturer in the world to successfully establish a molding process for conductive silicone rubber products.
For Sunarrow President Yuji Tokimune, maintaining variety is essential to staying innovative as the company explores new markets, including the medical and robotics fields. “Our market-driven thinking is what sets us apart,” Tokimune said. “Clients come to us when they can’t find solutions elsewhere.”
Sunarrow has developed its own proprietary compound, SARPLUS—a lightweight, high-performance resin alternative to metal for engineering applications. For high-pressure, high-temperature environments, the company’s SGOINT fluorine rubber (FKM) incorporates carbon nanotubes for enhanced performance. “Every successful product we’ve introduced has come from our commitment to solving real-world challenges,” Tokimune said. “That philosophy will continue to guide us as we move forward.”
