Keiji Kaiho

Title: Keiji Kaiho: Innovator in Polyphenylene Sulfide Fiber Technology

Introduction

Keiji Kaiho is a notable inventor based in Iyo-gun, Japan. He has made significant contributions to the field of materials science, particularly in the development of polyphenylene sulfide fibers. His innovative work has led to advancements in the properties and applications of these fibers.

Latest Patents

Keiji Kaiho holds a patent for a polyphenylene sulfide fiber, which includes a filter cloth made from this fiber and a method for producing it. The invention provides a polyphenylene sulfide fiber characterized by excellent tensile strength and reduced toughness loss during long-term heat treatment. The fiber is defined by a polyphenylene sulfide resin with a weight average molecular weight ranging from 50,000 to 80,000, a rigid amorphous content of 50% or more, and a crystal size of 5 nm or more in the direction of a (111) crystal plane. This innovation enhances the performance and durability of materials used in various applications.

Career Highlights

Keiji Kaiho is associated with Toray Industries, Inc., a leading company in advanced materials and fibers. His work at Toray has positioned him as a key figure in the development of high-performance materials. His contributions have not only advanced the company's product offerings but have also influenced the broader industry.

Collaborations

Throughout his career, Keiji has collaborated with notable colleagues, including Takeshi Sugimoto and Koichiro Maeda. These collaborations have fostered a creative environment that has led to significant advancements in their respective fields.

Conclusion

Keiji Kaiho's innovative work in polyphenylene sulfide fiber technology exemplifies the impact of dedicated inventors in advancing material science. His contributions continue to influence the industry and pave the way for future innovations.