Company Filing History:
Years Active: 1992-1993
Title: **Innovations in PTC Compositions: The Work of Akira Ueno**
Introduction
Akira Ueno, an innovative inventor based in Yokohama, Japan, has made significant contributions to the field of polymer science through his pioneering inventions. With a total of two patents to his name, Ueno specializes in developing advanced materials that enhance the efficiency and safety of electrical systems.
Latest Patents
Ueno’s latest patents focus on the process of creating PTC (positive temperature coefficient) self-resetting overcurrent protection elements. His first patent describes a method utilizing two different crystalline polymers combined with organic peroxide and carbon black. This unique process involves kneading the mixture at elevated temperatures, enabling a highly effective grafting technique that improves the material's conductive properties.
The two crystalline polymers in the process are selected strategically to ensure that the desired PTC characteristics are achieved. By varying the proportions of tertiary hydrogen atoms to carbon atoms in the polymers, Ueno enhances the benefits of highly crystallized and less crystallized polymers. This innovation results in a mixture that promotes uniform dispersion of carbon black, subsequently reducing localized heating and minimizing resistance changes during repeated overcurrent conditions.
His second patent outlines the production of a product with a positive temperature coefficient of resistance, highlighting the importance of porous carbon black. The process involves etching carbon black at elevated temperatures to remove less crystalline components, thereby increasing the specific surface area. The resulting blend with crystalline polymers forms a material that is suitable for use as a resettable fuse, showcasing Ueno’s commitment to advancing electrical safety technologies.
Career Highlights
Ueno is affiliated with Daito Communication Apparatus Co., Ltd., a company recognized for its dedication to innovative communication technology. His role within the company has enabled him to focus on developing materials that improve the performance and reliability of electrical components.
Collaborations
Throughout his career, Ueno has collaborated with talented professionals in his field, including Mayumi Takata and Naoki Yamazaki. These partnerships have fostered an environment of innovation and creativity, allowing for the successful development of complex projects that leverage each member's unique expertise.
Conclusion
Akira Ueno’s work in the realm of PTC compositions exemplifies the transformative power of innovation in material science. His commitment to developing materials that improve safety and efficiency in electrical systems will undoubtedly continue to impact the industry positively. As he advances his research and patents, Ueno stands at the forefront of innovation, pushing the boundaries of what is possible in polymer applications.