Yoshio Nakajima

Title: Yoshio Nakajima: Innovator in Ink Technology

Introduction

Yoshio Nakajima is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of ink technology, holding a total of 16 patents. His work primarily focuses on developing aqueous inks and ink jet recording methods that enhance image quality and durability.

Latest Patents

Among his latest patents, Nakajima has developed an aqueous ink that boasts excellent ejection stability. This ink is designed for ink jet applications and is capable of producing images with remarkable abrasion resistance. The formulation includes a pigment, an organic solvent, and resin particles made from either polyester or urethane resin. The organic solvent features a carbonate compound, which contributes to the ink's performance. Additionally, he has created an ink cartridge and an ink jet recording method that utilize this innovative aqueous ink.

Another notable patent involves an ink jet ink that exhibits superior ejection properties. This ink contains a polymer that enhances the scratch resistance of recorded images, preventing deviations in the ink-droplet impact point on the recording medium. The formulation specifies that the polymer's acid value ranges from 100 mg KOH/g to 220 mg KOH/g, with a weight-average molecular weight between 3,000 and 10,000. The surfactant used in this ink has a specific structural formula, ensuring optimal performance.

Career Highlights

Yoshio Nakajima has worked with several reputable companies throughout his career, including Canon and Kansai Paint Company, Ltd. His experience in these organizations has allowed him to refine his expertise in ink technology and contribute to various innovative projects.

Collaborations

Throughout his career, Nakajima has collaborated with notable colleagues such as Yuhei Shimizu and Eiichi Nakata. These partnerships have fostered a creative environment that has led to the development of groundbreaking ink technologies.

Conclusion

Yoshio Nakajima's contributions to ink technology have significantly advanced the field, particularly in the development of aqueous inks and ink jet recording methods. His innovative patents and collaborations with industry leaders underscore his impact as an inventor.