John L MacAdams

Title: Innovations of John L MacAdams in Rotational Molding

Introduction

John L MacAdams is a notable inventor based in Schaumburg, IL (US), recognized for his contributions to the field of rotational molding. With a total of two patents to his name, MacAdams has developed innovative methods and formulations that enhance the production of plastic articles.

Latest Patents

MacAdams' latest patents include a method of rotationally molding plastic articles. This method involves using blends of polymers that exhibit good flow characteristics to produce articles with high impact resistance, high stress crack resistance, smooth surfaces, and minimal warpage. The process entails placing the blend in a rotational mold, which is then biaxially rotated about two perpendicular axes while being heated and subsequently cooled to room temperature. The resulting articles demonstrate superior properties due to this innovative approach.

Another significant patent is for a resin formulation for rotational molding and shaped structures. This formulation consists of a three-component blend of polymers, including a polyethylene homopolymer or ethylene-alkene copolymer, combined with an ethylene-vinyl acetate copolymer and either an ethylene-propylene copolymer or an ethylene-propylene-diene terpolymer. These blends are particularly effective for rotational molding, offering synergistic properties that enhance environmental stress crack resistance and impact strength in the final products.

Career Highlights

MacAdams is currently associated with Chemplex Company, where he applies his expertise in polymer science and rotational molding. His work has significantly contributed to advancements in the manufacturing processes of plastic products.

Collaborations

Throughout his career, MacAdams has collaborated with notable colleagues, including William C Wu and Richard S Joyner. These partnerships have fostered innovation and development in the field of rotational molding.

Conclusion

John L MacAdams stands out as an influential inventor in the realm of rotational molding, with his patents reflecting a commitment to enhancing the quality and performance of plastic articles. His contributions continue to impact the industry positively.