Polypropylene: Structure, Properties, Uses Exir Polymer Polypropylene (PP) What Is It, Types, Properties, and Uses Injection Molding Materials: Polypropylene What is Polypropylene: Properties, Benefits, and Key Uses Polypropylene (PP), Plastic Raw Material, Polyethylene (PE) Engineering Plastic 30 Glass Filled Polypropylene Raw Material Virgin. This durable commercial container box is used for transporting goods. It folds compactly when not in use and does not slip when stacked. It has an opening window on the side so you can access your items from the side. It is an environmentally friendly storage item made with over 30% recycled polypropylene. User Guide (PDF: 1. 64MB)