Company Filing History:
21 out of 83 
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9 out of 43 Years Active: 2009-2025
Title: Innovations of Kazuhiro Jonai in Water-Based Inks
Introduction
Kazuhiro Jonai is a notable inventor based in Tokyo, JP, recognized for his significant contributions to the field of ink technology. With a remarkable portfolio comprising 24 patents, Jonai has demonstrated an impressive focus on the development of innovative water-based inks and their application in inkjet printing.
Latest Patents
Jonai's latest patents include groundbreaking developments in water-based inks for inkjet applications. One of his key inventions is a water-based ink formulation that involves a combination of a pigment, a fixing resin, an organic solvent, and water. This unique formulation features an A-B block polymer, where the A block contains a structural unit with an anionic functional group, and possesses an acid value ranging from 5 to 80 mg KOH/g.
Additionally, he has developed an ink set along with a method for producing printed matter. This innovation includes an inkjet ink that encompasses a pigment, a water-soluble organic solvent, a surfactant, and water, in conjunction with a treatment liquid containing a coagulant such as calcium nitrate. The treatment liquid is carefully designed with specific properties, featuring a pH range of 3.5 to 10.5 and a viscosity range at 25°C from 5.5 to 18.5 mPa·s.
Career Highlights
Throughout his career, Kazuhiro Jonai has made significant strides while working with esteemed companies like Toyo Ink Sc Holdings Co., Ltd. and Toyo Ink Co., Ltd. His work has considerably advanced the field of ink technology, providing solutions that enhance the durability and quality of printed materials.
Collaborations
Jonai has collaborated with notable coworkers in the industry such as Mayuko Okamoto and Yuji Kameyama. These collaborations have contributed to the innovation of new products and technologies in the ink sector, showcasing Jonai's ability to work effectively with other experts in the field.
Conclusion
Kazuhiro Jonai's contributions to water-based ink technology highlight his status as a pioneering inventor. With a robust portfolio of patents and a strong track record of collaboration, his work continues to influence the development of high-quality inkjet printing solutions. As he progresses in his career, further innovations from Jonai are anticipated, promising to propel the industry even further forward.