by Miranda Marcus, EWI Spin welding is a common joining process for plastic parts with circular joints such as insulated cups and bowls, filter housings and valves. In this process, heat is developed from surface friction as one part is revolved about the axis of the joint, resulting in a high linear speed. Finite element analysis (FEA) of the process can aid in determining … [Read more...] about FEA Modeling of Heat Development in Spin Welding
Articles
UV/Ozone Surface Pretreatment to Improve Adhesion of Polymers
by Scott R. Sabreen, president, The Sabreen Group, Inc. Note from the author: Printing and adhesion problems on many polymers and rubbers are common throughout industry. This is a result of the inherently low surface energy of polymers, among other factors. Surface oxidation processes can oxidize polymer surfaces, making them more wettable. Ultraviolet (UV)/ozone … [Read more...] about UV/Ozone Surface Pretreatment to Improve Adhesion of Polymers
Prototype Showcases In-Mold Processes and Protective Surface Coatings
by Dianna Brodine, vice president, editorial, Plastics Decorating Kurz Transfer Products, L.P., Huntersville, North Carolina, created a decorated door panel prototype that could be used to showcase several of the company’s decorating technology options, including hot stamping, IMD Roll, IMD Sheet and Insert. In the end, it was the application of the company’s in-mold … [Read more...] about Prototype Showcases In-Mold Processes and Protective Surface Coatings
What You Need If You are Called to Lead
by Dr. Rhea Seddon, astronaut and author Today’s world offers significant challenges for both emerging and experienced leaders. Many people don’t start out to be a leader but the paths they have chosen require that they become one. Regardless of the size of the group, its makeup or goals, there are proven principles that can be applied to lead any assemblage of people – even … [Read more...] about What You Need If You are Called to Lead
Understanding Color in Decorated Plastics
by Paul Uglum, president, Uglum Consulting, LLC One of the primary purposes of decorating processes is to impart color to the object being decorated. Color is used to create beauty, to increase perceived value, to convey information and to define brand character. Color is only one aspect of a part’s appearance. Appearance is a combination of color, gloss, shape, geometry and … [Read more...] about Understanding Color in Decorated Plastics