Similar type of closed-cell foam, EPE (expansion polyethylene) and EVA (ethylene/vinyl acetate) constitutes the most most of its products market. The prominent characteristics of both excellent, such as shock absorption, flexibility, thermal insulation and waterproof. Both can be produced at a reasonable price, usually overlap in function. Nevertheless, EVA packaging materials and there are differences of EPE packaging material.

EVA packing material

endurance

One of the biggest advantage of EVA compared with EPE is its durability. Average EVA foam density and tearing strength value is common EPE foam 5 times or more times. Because of their closed pore structure, both have excellent buffer and shockproof capability, but EVA foam last longer. This natural means that its price is higher, this makes EPE in the case of cost prior to product life better.

The elastic

EVA foam is much more flexible than EPE, tensile strength of the former is several orders of magnitude higher than the latter. The compressive strength and elongation. EVA foam has better response characteristics, make its become outstanding in the rubber in some applications and cost-effective alternatives, such as sole and trampoline mat. Although EPE elasticity is low, but it still flexible enough, can be used in the product packaging is sensitive to vibrations, make it become a kind of efficient packaging materials.

Heat resistance

EPE foam than EVA has better thermal performance. For EPE foam, the typical values of the thermal conductivity range 0.01 0.02 BTU/hr - ft ° F, EVA 0.25 0.29 BTU/hr - ft ° F. Low thermal conductivity of EPE make its excellent heat resistance, making it a wall, ceiling and roof insulation material. The effective service temperature ranges from - 58 ° to 158 ° F. For more than the temperature, EVA foam to become a better choice, up to 176 ° F.