Location History:
- Okayama, JA (1977 - 1978)
- Okayama, JP (1983 - 1989)
Company Filing History:
7 out of 111 
1 out of 6,896 Years Active: 1977-1989
Title: **Shigeru Sawanishi: Innovator in Acrylic Fiber Technology**
Introduction
Shigeru Sawanishi, an esteemed inventor based in Okayama, Japan, has made significant contributions to the field of acrylic fiber technology. With a remarkable portfolio of 7 patents, he has been instrumental in advancing the quality and functionality of synthetic fibers.
Latest Patents
Among his latest inventions are two notable patents that showcase innovative methods of producing high-performance acrylic fibers. The first patent, titled "Method of Producing Acrylic Fibers," describes a technique where a spinning solution of an acrylonitrile polymer is subjected to dry-wet spinning through a specially designed annular type spinneret. This spinneret incorporates more than 3,000 spinning orifices at its perforated part, which allows for the production of uniform acrylic fibers. This method effectively reduces quality unevenness and fiber defects that can arise from issues like uneven coagulation and filament agglutination.
The second patent, "Water-Absorbing Acrylic Fibers," presents a novel composition of porous acrylic fibers. These fibers comprise at least 90 weight % of an acrylonitrile polymer along with less than 10 weight % dispersed water-absorbing resin particles. The fibers exhibit impressive properties, including a high degree of water-swellability and stable water-absorbing ability, making them highly functional in various applications. Their excellent physical properties, such as strength and dyeability, further enhance their practical use.
Career Highlights
Shigeru Sawanishi has had a distinguished career within renowned companies, including Japan Exlan Company Limited and Sumitomo Chemical Company, Limited. His expertise in fiber technology has not only led to innovations but has also positioned him as a key figure in the industry.
Collaborations
Throughout his career, Sawanishi has worked alongside talented colleagues such as Akira Sugiura and Yozo Shiomi. These collaborations have likely enriched his research and contributed to the successful development of his patented technologies.
Conclusion
Shigeru Sawanishi's innovations in acrylic fiber technology exemplify the impact of dedicated inventors on the textile industry. His patents continue to influence the production of high-quality, functional fibers that meet the evolving needs of various applications. With his extensive experience and forward-thinking approach, Sawanishi remains a vital contributor to advancements in synthetic materials.