Sadahiko Shiraga

Title: Sadahiko Shiraga: Innovator in Gas Barrier Technology

Introduction

Sadahiko Shiraga is a prominent inventor based in Kurashiki, Japan. He has made significant contributions to the field of materials science, particularly in the development of gas barrier films and water-resistant compositions. With a total of 5 patents to his name, Shiraga continues to push the boundaries of innovation in his industry.

Latest Patents

One of Shiraga's latest patents is a method for producing gas barrier film. This method ensures that the coating film produced exhibits excellent oxygen gas barrier properties while being minimally affected by moisture. The process involves extruding a polyvinyl alcohol containing not more than 19 mol % of α-olefin units with no more than 4 carbon atoms onto a substrate film. The film is then stretched at least three-fold and subjected to heat treatment at a temperature not lower than 120°C.

Another notable patent is for a water-resistant composition, coating agent, and recording material. This invention comprises a uniform mixture of modified polyvinyl alcohol and an organotitanium compound with a chelating ligand. The blend ratio of the components is carefully controlled to ensure optimal performance. This composition is utilized in various applications, including thermal recording materials and ink-jet recording materials.

Career Highlights

Shiraga is currently employed at Kuraray Co., Ltd., a leading company in the field of advanced materials. His work has been instrumental in enhancing the performance of products that require superior gas barrier properties and water resistance. His innovative approaches have positioned him as a key figure in the industry.

Collaborations

Throughout his career, Shiraga has collaborated with notable colleagues, including Shigeki Takada and Hitoshi Maruyama. These partnerships have fostered a creative environment that encourages the exchange of ideas and the development of groundbreaking technologies.

Conclusion

Sadahiko Shiraga's contributions to the field of materials science, particularly in gas barrier technology, highlight his role as an influential inventor. His innovative patents and collaborations continue to shape the future of advanced materials.