By reviewing and comparing all commercially available welding processes, this authoritative handbook helps the reader select the best-suited process for the application and provides an understanding on the limitations and benefits of each process. The focus on practical aspects such as weldability, optimizing part design, troubleshooting, and testing makes this book an indispensable tool for everyone involved in welding of plastics. At the same time, it also conveys the basic theoretical principles of plastics welding such as squeeze flow, molecular diffusion, and heat transfer mechanisms. This handbook is intended for a wide audience including: welders and welding equipment operators, design engineers, manufacturing engineers, chemical engineers, material scientists, and research and development personnel. Each chapter was developed by experts in the field with a wide breadth of information dealing with all welding aspects including materials, process phenomenology, equipment, and joint design. The authors also included many application examples to assist engineers in considering the materials and geometries that were successfully used for a specific process. While not all encompassing, the handbook provides the basic information along with references that can be used to gather additional information or details.