Company Filing History:
8 out of 55 
2 out of 9 
1 out of 1 Years Active: 1997-2021
Title: Walter R. Harfmann: Innovator in Polyester Foam Technology
Introduction
Walter R. Harfmann is a notable inventor based in Matthews, NC (US), recognized for his contributions to the field of polymer technology. He holds a total of 11 patents, showcasing his innovative approach to creating advanced materials. His work primarily focuses on the production of low-density polyester foam, which has significant applications in various industries.
Latest Patents
Harfmann's latest patents include a method for the production of low-density polyester foam and articles made thereof utilizing low intrinsic viscosity (I.V.) polyester feedstock. This method involves providing a low intrinsic viscosity raw material that consists of 25% to 100% post-consumer polyester, with an intrinsic viscosity of less than 0.8 dl/g. The process increases the intrinsic viscosity through a de-condensation reaction, allowing for effective foaming. The resulting polyester foam produced has a specific gravity of less than 0.65 g/cc.
Another significant patent is for a polymeric foam sheet using an ambient gas blowing agent via controlled expansion. This innovation features an annular die designed to produce polymer foam using ambient gases as a blowing agent. The die's exit channel is thermally isolated and independently controlled, enhancing the efficiency of the foaming process.
Career Highlights
Throughout his career, Walter R. Harfmann has worked with prominent companies, including Genpak, LLC. His experience in these organizations has contributed to his expertise in polymer technology and innovation.
Collaborations
Harfmann has collaborated with various professionals in his field, including his coworker Michael E. Reedy. These partnerships have fostered a creative environment that has led to significant advancements in polyester foam technology.
Conclusion
Walter R. Harfmann's innovative work in the field of polyester foam production has made a lasting impact on the industry. His patents reflect a commitment to advancing material technology, and his collaborations have further enhanced his contributions.