Location History:
- Yamaguchi, JP (2004 - 2010)
- Iwakuni, JP (2010)
- Tokyo, JP (2017)
- Osaka, JP (2023)
Company Filing History:
8 out of 1,588 
2 out of 6 
1 out of 567 
Years Active: 2004-2024
Title: **Inventor Masayuki Chokai: Pioneering Thermal Management and Carbon Fiber Technology**
Introduction
Masayuki Chokai, an innovative inventor based in Iwakuni, Japan, has made significant contributions to the fields of thermal management and composite materials. With a total of eight patents to his name, Chokai's work focuses on developing advanced materials that enhance performance and efficiency in various applications.
Latest Patents
His most recent patents exemplify his dedication to innovation. One of his notable inventions is an **insulation sheet** designed to provide high thermal conductivity in the in-plane direction. The insulation sheet comprises insulating particles and a binder resin, which constitutes 75 to 97% by area of the particles and 3 to 25% by area of the binder, with the voids kept to 10% by area or less.
Another significant patent involves a **sizing agent composition** for carbon fibers, improving the adhesion between resin and carbon fibers in composite materials. This composition includes a blocked isocyanate and a compound with at least one polar group and one unsaturated group per molecule. The optimal mixing ratio of these components is crucial for achieving superior mechanical properties in carbon fiber-reinforced composite materials.
Career Highlights
Chokai has worked with prominent companies in the industry, including Teijin Limited and Teijin Techno Products Limited, where he has leveraged his expertise in material science. His efforts have led to innovations that are not only groundbreaking but also essential in driving advancements in technology and manufacturing processes.
Collaborations
Throughout his career, Masayuki Chokai has collaborated with esteemed colleagues such as Hiroaki Kuwahara and Shunichi Matsumura. These partnerships have fostered an environment of creativity and innovation, contributing to his success and the successful development of new technologies in the field.
Conclusion
Masayuki Chokai’s contributions to the invention of advanced insulation sheets and carbon fiber sizing agent compositions establish him as a notable figure in the realm of material technology. His innovative spirit, combined with significant collaborations and a robust career, continue to influence the industries he serves. As he advances his research and development efforts, the impact of his inventions is poised to resonate within the technological landscape.