Location History:
- Kadoma, JP (1994)
- Hirakata, JP (1994 - 1995)
Company Filing History:
4 out of 1,623 
3 out of 606 
1 out of 158 Years Active: 1994-1995
Title: Seishiro Yamakawa: Innovator in Glass Fiber Technology
Introduction
Seishiro Yamakawa is a notable inventor based in Hirakata, Japan. He has made significant contributions to the field of glass fiber technology, holding a total of 4 patents. His work focuses on developing glass fiber forming compositions that exhibit remarkable properties.
Latest Patents
Yamakawa's latest patents include a glass fiber forming composition that demonstrates a remarkably high dielectric constant, as well as superior chemical resistance. This composition is designed to be readily spun into glass fibers, characterized by a devitrification temperature lower than the spinning temperature. The composition consists of 40 to 65 mol % of SiO2, 20 to 45 mol % of components such as MgO, CaO, SrO, and BaO, and 5 to 25 mol % of TiO2 and ZrO2. Additionally, it incorporates 0.5 to 15 mol % of NbO5/2 and can also include AlO3/2. The dielectric constant of this composition is 9 or more at 1 MHz and 25°C.
Career Highlights
Throughout his career, Yamakawa has worked with prominent companies such as Matsushita Electric Works, Ltd. and Nippon Electric Glass Co., Ltd. His expertise in glass fiber technology has positioned him as a key figure in the industry.
Collaborations
Yamakawa has collaborated with notable individuals in his field, including Kiyotaka Komori and Shigeru Yamamoto. These collaborations have contributed to the advancement of glass fiber technology.
Conclusion
Seishiro Yamakawa's innovative work in glass fiber technology has led to significant advancements in the field. His patents reflect a commitment to enhancing the properties of glass fibers, making him a valuable contributor to the industry.