We mold various synthetic rubbers, primarily silicone sponge and silicone rubber, using direct pressure pressing.
At Koyo Polymer Co., Ltd., we manufacture and sell silicone rubber, silicone sponge, fluororubber, and polyurethane rubber using silicone. Regarding silicone sponge, we can also produce large sizes that are impossible to create through extrusion molding. We can accommodate various hardness levels, colors, high strength, and heat-resistant grades. Additionally, we offer adhesive tape processing and frame processing. Please feel free to contact us with your requests. 【Manufactured Products】 ■ Silicone rubber / Silicone sponge / Fluororubber / Polyurethane rubber ■ Extruded products and molded products mentioned above, as well as various synthetic rubber products *For more details, please download the PDF or feel free to contact us.
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【Products Offered】 〔Extruded Products〕 ■Silicone Sponge ・Square Cord ・Round Cord ・Tube ・Special Shapes ■Silicone Rubber ・Round Cord / Tube ・Special Shapes 〔Molded Products〕 ■Silicone Sponge/Rubber ・Sheet ・Molded Products ・Rubber Molded Products *For more details, please download the PDF or feel free to contact us.
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【Achievements】 ■ Electronic communication equipment ■ Drying machinery ■ Construction-related ■ Medical and treatment-related ■ Automotive ■ Home appliances ■ Food-related *For more details, please download the PDF or feel free to contact us.
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Company information
Koyo Polymer Co., Ltd. is a specialized manufacturer of silicone rubber products, established in 1954 and headquartered in Nagata Ward, Kobe City, Hyogo Prefecture. The company succeeded in commercializing Japan's first silicone sponge and has led the industry with its technological expertise cultivated over more than 70 years. It manufactures and sells silicone sponges, fluorine rubber, polyurethane rubber, and other products, which are utilized in various fields such as construction, electronics, medical applications, 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 guided by the philosophy of "creating together with our 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.
