Location History:
- Cary, NC (US) (1983)
- Mechanicsville, VA (US) (1988 - 1999)
Company Filing History:
Years Active: 1983-1999
Title: **James J Dunbar: A Pioneer in Polyolefin Innovations**
Introduction
James J Dunbar is an influential inventor based in Mechanicsville, Virginia, known for his significant contributions to the field of polymer technology. With a portfolio of 10 patents, he has made remarkable advancements in the development of polyolefin fibers, enhancing their performance characteristics for various applications.
Latest Patents
Dunbar's most recent patents focus on creating very low creep, ultra high modulus, low shrink, high tenacity polyolefin fibers. Through a meticulous poststretching process conducted at temperatures between 135°C and 160°C, these fibers exhibit exceptional strength retention at high temperatures. Specifically, his innovations have achieved tensile modulus values exceeding 2,000 g/d for multifilament yarn, with tensile strength values surpassing 30 g/d. Moreover, his fibers demonstrate a significant improvement in creep by at least 25% when subjected to high loads, compared to non-poststretched fibers. Additionally, the shrinkage of these fibers is minimized to below 2.5% of their original length when heated from room temperature to 135°C. Dunbar's work also includes the development of entangled high strength yarns, which are crucial for making ballistic-resistant articles.
Career Highlights
Throughout his career, Dunbar has worked with reputable companies such as AlliedSignal Inc. and Allied Corporation, where he has honed his expertise in polymer development. His innovative spirit and dedication to advancing material science have positioned him as a key figure in the industry.
Collaborations
James J Dunbar has collaborated with notable professionals in the field, including colleagues Gene C Weedon and Thomas Y Tam. Together, they have worked on pioneering projects that leverage their combined knowledge to create high-performance materials.
Conclusion
In conclusion, James J Dunbar's contributions to the field of polyolefins are invaluable. His extensive patent portfolio not only highlights his inventiveness but also underscores the importance of innovation in materials science. As he continues to push the boundaries of what is possible, Dunbar remains a significant figure in the evolution of high-performance fibers.