Both EPP (Expanded Polypropylene) and EPS (Expanded Polystyrene) are used as manufacturing material for the Glass-wrap packaging system because of their special properties. They are highly versatile closed-cell foams that provide a unique range of characteristics, including outstanding energy absorption, impact resistance, thermal insulation, buoyancy, water and chemical resistance, exceptionally high strength to weight ratio and 100% recyclability.
EPP is found most often in applications where high impact resistance and shock absorption are required multiple times. Examples are car bumpers, seat-headrests, crash pads, etc.
EPS boasts similar characteristics but permanent deformation may occur when impacted, making it generally more suitable for single use only.