Combining scientific principles with engineering practice, this book discusses the theory, design, processing, and application of degradable foam extraction; presents the collective expertise of leading academic, research, and industry specialists; and captures the interesting evolution of the field. Containing updated chapters on extrusion equipment, blowing agents, PET foam, and microcellular innovation, the second edition includes new chapters on the latest developments in processing, rheology, and biodegradable and sustainable foams, as well as new coverage of cutting-edge foaming mechanisms and new case studies, examples, and figures.