コーキマテリアル Company Profile

A buoyant heart, an expanding world, the development and applications of the material rubber are broadening.

Koki Material Co., Ltd. has been engaged since 1923 in the production of industrial special rubber sheets, hoses, molded products, and processed goods, as well as various rubber rings for cast iron pipe joints related to water supply projects that support a healthy and prosperous life, rubber products for various valves, water meters, packing for stop valves, and more, all in accordance with the certification standards of the Japan Water Works Association. Furthermore, leveraging our long-standing achievements and acquired know-how, we focus on new materials and processing technologies for safety and environmental conservation, such as precision rubber for firefighting standards and sensor rubber, and we are committed to creating products that are friendly to nature and people. Having been involved in various industrial rubber products and rubber processing, we can broadly capture the properties and characteristics of rubber materials and provide rubber products tailored to specific applications. For example, we explore whether it is possible to create rubber that is less slippery even when wet or oily, or conversely, rubber with surface lubricity that is resistant to wear while ensuring sealing without grease. Utilizing our years of experience, we conduct daily research to meet our customers' needs.