Polypropylene is one of the most common plastics used worldwide. In fact, it’s second only to polyethylene in volume. Despite being such a commonly used material, however, it’s still important for engineers and entrepreneurs alike to understand polypropylene plastic: its properties, its uses and even a bit of its history. In addition to being broadly found in full-production manufacturing, polypropylene is well suited for prototyping. Understanding more about the material will help you learn why.