Location History:
- Shiga, JP (2001)
- Otsu, JP (2006)
Company Filing History:
Years Active: 2001-2006
Title: Innovations of Shozi Nakajima
Introduction
Shozi Nakajima is a notable inventor based in Shiga, Japan. He has made significant contributions to the field of polyester film technology. With a total of 3 patents to his name, Nakajima's work has been instrumental in advancing materials used in magnetic recording media.
Latest Patents
One of Nakajima's latest patents is for a polyester film and method for producing the same. This invention provides a polyester film particularly useful as a base film for magnetic recording mediums, such as cassette-type magnetic tape of a digital recording mode. The production process involves irradiating UV light onto the surface of a film in a non-stretched stage or a stage prior to the completion of stretching, which forms fine protrusions on the surface. The characteristics of these fine protrusions are specified by the ratio of 10-point average roughness Rz to center line average roughness Ra (Rz/Ra) being less than 20, the difference in concentration of carboxyl groups between the surface layer part and the inside of the film, and the number of fine protrusions.
Another significant patent is for a biaxially oriented polyester film. This film comprises at least one layer predominantly made of polypropylene terephthalate and exhibits a heat shrinkage of 0.8% or below after standing at 80°C for 30 minutes. This film is particularly noted for its excellent wear resistance, making it especially useful for magnetic recording media.
Career Highlights
Shozi Nakajima is currently employed at Toray Industries, Inc., a leading company in the field of advanced materials. His work at Toray has allowed him to focus on innovative solutions in polyester film technology, contributing to the company's reputation for excellence in material science.
Collaborations
Nakajima has collaborated with notable coworkers, including Yukari Nakamori and Iwao Okazaki. These collaborations have fostered a creative environment that encourages innovation and the development of new technologies.
Conclusion
Shozi Nakajima's contributions to polyester film technology have made a significant impact in the field of magnetic recording media. His innovative patents and work at Toray Industries, Inc. highlight his role as a leading inventor in this specialized area.