Company Filing History:
2 out of 832,880 Years Active: 1976-1977
Title: The Innovative Contributions of Andrew Keller
Introduction
Andrew Keller is a notable inventor based in Bristol, GB. He has made significant contributions to the field of polymer science, particularly in the area of oriented crystallization of polymers. With a total of 2 patents to his name, Keller's work has advanced the understanding and application of crystalline polymers.
Latest Patents
Keller's latest patents focus on the oriented crystallization of polymers. The first patent describes a method for producing crystalline polymer fibrils that have a highly ordered crystalline core surrounded by less ordered crystalline polymer. This is achieved by causing a solution of the polymer to flow through a gauze at a temperature that is below the dissolution temperature but above the crystallization temperature. The flow rate is carefully selected to create a high longitudinal velocity gradient, ideally around 10² sec⁻¹ or greater.
The second patent also addresses the oriented crystallization of polymers, detailing a process where molten crystallizable polymer is extruded through an orifice. A fixed surface is positioned on the upstream side to create a line of uniaxial extension or a plane of pure shear in the molten polymer. This method allows for the formation of a crystalline core in the melt, making it particularly suitable for extruding continuous filaments with a highly crystalline core surrounded by a less crystalline matrix.
Career Highlights
Throughout his career, Andrew Keller has demonstrated a commitment to innovation in polymer technology. His patents reflect a deep understanding of the complexities involved in polymer crystallization and processing.
Collaborations
Keller has worked alongside esteemed colleagues such as Frederick Charles Frank and Malcolm Robert Mackley. Their collaborative efforts have contributed to advancements in the field and have fostered a rich environment for innovation.
Conclusion
Andrew Keller's contributions to the field of polymer science through his innovative patents highlight his expertise and dedication to advancing technology. His work continues to influence the development of new materials and processes in the industry.