What are the densities of EVA foam and how do you choose the right one?

EVA foam has a density range of 0.03-0.9 g/cm³, with common density grades being 15D, 25D, 35D, 45D, and 55D (D is the density unit; the higher the number, the higher the density). The choice should be based on the application scenario and performance requirements. Low-density EVA foam (15D-25D): Lightweight and elastic, with excellent cushioning and shock absorption, but weaker load-bearing and abrasion resistance. Suitable for packaging cushioning pads, baby crawling mats, and protective gear linings where load-bearing requirements are not high. Medium-density EVA foam (35D-45D): Combines elasticity and load-bearing capacity, soft to the touch and not easily deformed. Suitable for insoles, sofa cushion filling, and sports equipment midsoles where a certain load-bearing capacity is required. High-density EVA foam (55D and above): Harder, with strong load-bearing capacity and abrasion resistance, but slightly less elastic. Suitable for industrial cushioning pads, equipment seals, and building waterproof membranes where high strength is required. In addition, closed-cell EVA foam is suitable for waterproof applications, while open-cell foam is suitable for breathable applications. When purchasing, it is necessary to combine density and pore type for comprehensive selection.