Eiji Koyasu

Title: Eiji Koyasu: Innovator in Hose Production Technology

Introduction

Eiji Koyasu is a notable inventor based in Ootawara, Japan. He has made significant contributions to the field of hose production technology, particularly in developing methods that enhance the durability and reliability of hoses used for transferring refrigerant gases.

Latest Patents

Koyasu holds a patent for a "Method for producing hose having low permeability." This innovative method involves preparing a rubber mandrel with an outer releasing layer made of fluoride rubber. The process includes applying a silicon-based releasing agent with a viscosity of 300-1000 cs to the mandrel while it is in motion. Subsequently, a molten resin is extruded and coated onto the mandrel, forming a resin layer. This technique improves the releasability of the mandrel, preventing damage to the resin layer when the mandrel is removed. As a result, hoses produced using this method are effective in preventing gas leakage and exhibit high durability, making them suitable for transferring refrigerant gases like freon.

Career Highlights

Eiji Koyasu is associated with Sakura Rubber Co., Ltd., where he has been instrumental in advancing hose production technologies. His work has not only contributed to the company's reputation but has also set new standards in the industry.

Collaborations

Koyasu has collaborated with notable colleagues, including Katsuyoshi Fujiu and Hisatoshi Tsuchida. Their combined expertise has further enhanced the innovative capabilities within their field.

Conclusion

Eiji Koyasu's contributions to hose production technology exemplify the importance of innovation in ensuring product reliability and safety. His patented methods have paved the way for advancements in the industry, showcasing his role as a key inventor in this specialized field.