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Expanded polypropylene EPP is a porous bead product made of CO2 as a physical foaming agent, and has become the fastest growing new environmentally friendly compressive buffer thermal insulation material. EPP has the characteristics of good buffering, excellent seismic energy absorption, light specific gravity, high recovery rate after deformation, chemical resistance, wide service temperature, wide foaming rate range, oil resistance and heat insulation. On top of that, EPP can significantly reduce the weight of the finished product and even improve overall efficiency. Compared with the expanded polystyrene EPS commonly used in the market, EPP has obvious advantages in terms of mechanical strength, impact resistance, and water absorption. EPP has no organic volatiles, benzene, aldehydes, ketones and other harmful substances, and meets the strict requirements of automobile OEMs for automotive interior odors.
Because of these advantages and performance, EPP is widely used in automobiles, such as automotive bumpers, seat systems, trunk tool boxes, automotive sun visors, buffer protection blocks, auto parts turnover packaging, commercial vehicle sleeper toolboxes, new energy vehicle high flame retardant series batteries, high-end automotive sound insulation and noise reduction separators, etc. Taking the application of EPP cushioning foam in automobile bumper system as an example, EPP not only needs to have the buffering energy absorption performance as a bumper application, but also needs to contribute to the weight reduction of automobiles. Today’s EPP can be about half as light as the core material of PUR bumper on the market.
Overall, EPP has the following various properties: sound insulation, thermal insulation, structural strength, protection against oil, water and chemicals, durability, energy absorption, resistance to multiple impacts, weight, good elasticity, multi-density products, buoyancy, environmental protection.
