宏陽高分子 Company Profile

Creating future silicone rubber products with innovation and kindness.

Koyo Polymer Co., Ltd. is a specialized manufacturer of silicone rubber products, established in 1954 and headquartered in Nagata Ward, Kobe City, Hyogo Prefecture. It successfully commercialized Japan's first silicone sponge and has led the industry with its technological expertise cultivated over more than 70 years. The company manufactures and sells silicone sponges, fluororubber, polyurethane rubber, and other products, which are utilized in various fields such as construction, electronics, medical, and food containers. The heat-resistant, cold-resistant, and shock-absorbing silicone sponges are used in gaskets and custom products are also offered. The company differentiates itself as a sales agent for urethane joints through its unique network. With a commitment to technological innovation and quality, and a philosophy of "creating together with customers," it flexibly responds with a small elite team of about 20 members. With technology originating from Kobe, it balances local engagement with nationwide expansion, demonstrating its presence in specialized fields. Moving forward, it will continue to contribute to society as a pioneer in silicone technology.