Company Filing History:
Years Active: 2015-2023
Title: Seiji Hamanaka: Innovator in Ink Composition
Introduction
Seiji Hamanaka is a notable inventor based in Tochigi, Japan. He has made significant contributions to the field of ink compositions, holding a total of 3 patents. His work focuses on developing innovative materials that enhance the quality and performance of printed products.
Latest Patents
Hamanaka's latest patents include an ink composition that boasts excellent storage stability and the ability to produce printed materials with a superior metal tone. This active energy ray curable ink composition features a scaly metal pigment, a polymerizable compound, and a photopolymerization initiator. The scaly metal pigment is characterized by a 50% volume average diameter of at least 0.05 µm and less than 0.5 µm, an average thickness of at least 5.0 nm and less than 50.0 nm, and a non-reactive solvent content of 0.01%-5.00% by mass.
Another significant patent involves a metallic ink composition specifically designed for inkjet printing on polyvinyl chloride substrates. This composition is capable of forming printed matter with superior mirror gloss and excellent scratch resistance. It also prevents nozzle clogging during the inkjet printing process. This innovative metallic ink composition includes a polyester resin with a weight average molecular weight of no greater than 12,000, a metallic pigment dispersion created from evaporated aluminum pigment in an organic solvent, and an organic solvent that is compatible with the polyvinyl chloride substrate.
Career Highlights
Seiji Hamanaka is currently employed at Dai Nippon Toryo Co., Ltd., where he continues to push the boundaries of ink technology. His work has been instrumental in advancing the capabilities of ink compositions used in various printing applications.
Collaborations
Hamanaka collaborates with talented coworkers, including Akira Iwasawa and Keita Aoki. Their combined expertise contributes to the innovative projects at Dai Nippon Toryo Co., Ltd.
Conclusion
Seiji Hamanaka is a prominent figure in the field of ink composition innovation. His patents reflect a commitment to enhancing the quality and functionality of printing materials. His contributions continue to influence the industry positively.