Shoichi Tsuji

Title: The Innovations of Shoichi Tsuji

Introduction

Shoichi Tsuji is a notable inventor based in Tanashi, Japan. He has made significant contributions to the field of materials science, particularly in the development of polyimide films and sheets. With a total of 7 patents to his name, Tsuji's work has had a lasting impact on various industries.

Latest Patents

Tsuji's latest patents include a polyimide film and a preparation process for this film. The polyimide film consists of recurring units that provide a density of 1.335 to 1.390 g/cm³ at 23°C and a refractive index of 1.605 to 1.680 at the same temperature. This film is characterized by its transparency and is produced through a common melt-extrusion process. The preparation involves casting the polyimide in a chill-roller to obtain an unstretched film, which is then uniaxially or biaxially stretched to achieve molecular orientation, followed by heat treatment. Additionally, Tsuji has developed polyimide sheets that exhibit excellent thermal resistance and good surface appearance, achieved through a melt-extrusion process at temperatures ranging from 300°C to 450°C with a moisture content of 200 ppm or less.

Career Highlights

Throughout his career, Tsuji has worked with prominent companies such as Mitsui Toatsu Chemicals and Ferric Inc. His experience in these organizations has allowed him to refine his expertise in polymer technology and materials development.

Collaborations

Tsuji has collaborated with notable individuals in his field, including Masumi Saruwatari and Shinobu Moriya. These collaborations have contributed to the advancement of his research and innovations.

Conclusion

Shoichi Tsuji's contributions to the field of polyimide materials have established him as a significant figure in materials science. His innovative patents and collaborations reflect his dedication to advancing technology in this area.