Werner Schaefer

Title: Werner Schaefer: Innovator in Polyester Film Technology

Introduction

Werner Schaefer is a notable inventor based in Hofheim-Diedenbergen, Germany. He has made significant contributions to the field of polyester film technology, holding a total of 5 patents. His work focuses on enhancing the properties of polyester films, making them more durable and efficient for various applications.

Latest Patents

One of Schaefer's latest patents involves a polyester film designed with improved abrasion resistance, dimensional stability, drawability, and slip properties. This innovative film contains 0.005 to 5.0% by weight of organic particles, preferably hardened or crosslinked, with a narrow particle size distribution ranging from 0.01 to 5 microns. Additionally, it includes a nucleating agent in an amount from 0.01 to 10% by weight, both values related to the weight of the polymers forming the film.

Another significant patent describes a process for producing an oriented, heat-set polyester film that includes an admixture of polydiorganosiloxane in the amount of 0.001 to 2% by weight. This process also incorporates further additives, such as inert inorganic and/or organic particles. The thermoplastic material is melted in an extruder and extruded through an appropriate die to create a cast film, which is then quenched, reheated, stretch oriented, and heat set. The key feature of this process is the addition of polydiorganosiloxane to the polydiorganosiloxane-free polyester in the form of a masterbatch.

Career Highlights

Werner Schaefer has been associated with Hoechst Aktiengesellschaft, a prominent company in the chemical industry. His work at Hoechst has allowed him to develop and refine his innovative ideas in polyester film technology.

Collaborations

Throughout his career, Schaefer has collaborated with notable colleagues, including Hermann Dallmann and Hartmut Hensel. These collaborations have contributed to the advancement of polyester film technologies and have fostered a productive research environment.

Conclusion

Werner Schaefer's contributions to polyester film technology have made a significant impact in the industry. His innovative patents and collaborative efforts continue to influence advancements in this field.