Location History:
- Hyogo, JP (2001)
- Akashi, JP (1992 - 2002)
Company Filing History:
2 out of 698 
2 out of 1,702 
Years Active: 1992-2002
Title: Hiroshi Yokoyama: Innovator in Vinyl Chloride Fiber Technology
Introduction
Hiroshi Yokoyama is a notable inventor based in Akashi, Japan. He has made significant contributions to the field of materials science, particularly in the development of vinyl chloride fibers. With a total of 4 patents to his name, Yokoyama's work has paved the way for advancements in artificial hair fibers.
Latest Patents
Yokoyama's latest patents focus on the production of vinyl chloride fibers that closely resemble human hair. One of his key inventions is a process for producing a vinyl chloride fiber with a small fineness, achieving a surface luster that is seven-tenths to half of the full luster. This fiber is particularly useful for applications in artificial hair decoration, such as doll hair. The process involves formulating a vinyl chloride resin composition with specific ratios of ethylene-vinyl acetate resin, thermal stabilizers, and lubricants. The resulting fiber is produced through melt spinning, showcasing remarkable similarities to human hair in both feel and appearance.
Career Highlights
Throughout his career, Hiroshi Yokoyama has worked with prominent companies in the industry. He has been associated with Kanegafuchi Kagaku Kogyo Co., Ltd. and Kaneka Corporation, where he has contributed to various innovative projects. His expertise in materials science has been instrumental in advancing the technology behind vinyl chloride fibers.
Collaborations
Yokoyama has collaborated with notable colleagues, including Masaaki Yokoe and Kazumasa Yamane. These partnerships have fostered a creative environment that has led to significant advancements in their respective fields.
Conclusion
Hiroshi Yokoyama's contributions to the development of vinyl chloride fibers have established him as a key figure in materials innovation. His patents reflect a commitment to enhancing the quality and functionality of artificial hair fibers. Through his work, he continues to influence the industry and inspire future innovations.