Evaluating Ultrasonic Welding of Medical Plastics: Part 2

For ultrasonic welding (USW) processes, it is essential to understand how key parameters and material properties can influence the results of the process. A previous article, “Understanding Ultrasonic Welding,” described the theoretical framework for USW of thermoplastics, including welding process pros, cons, joint types, part design influencers, and general knowledge.1 This article presents the key parameters and materials influencing an ultrasonic welding process, so that USW can be accomplished successfully. The study provided fundamental knowledge about the USW behavior of CYROLITE® poly(methyl methacrylate (PMMA) copolymers, polycarbonate (PC), methyl methacrylate acrylonitrile butadiene styrene (MABS), and styrene acrylonitrile (SAN). It showed the key parameters used, the influence on the welding joints, and the compatibility of these materials in an ultrasonic welding process.