plastic case with EPE foam

EPE Foam and EVA Foam: Comparison and Application Characteristics

In the field of material science, EPE foam and EVA foam are common foam materials, each with unique properties and application fields. This article will compare the characteristics and applications of EPE foam and EVA foam to better understand these two materials.

Material structure and properties

EPE foam, also known as pearl foam, is composed of low-density polyethylene grease that produces countless independent bubbles through physical foaming. This structure gives EPE foam excellent cushioning and shock-resistant properties, which can effectively absorb and disperse impact forces and protect items from damage. At the same time, EPE foam also has excellent thermal insulation properties and sound insulation effects, making it widely used in packaging, logistics, sports equipment and other fields.

EVA foam is a foam material made of ethylene-vinyl acetate copolymer. Its internal structure is also composed of bubbles, but the shape and distribution of the bubbles are slightly different from those of EPE foam. EVA foam has good softness and elasticity, and also has certain chemical resistance.

Hardness and color

In terms of hardness, both EPE foam and EVA foam have a certain degree of adjustability and can be adjusted according to different application requirements. However, in comparison, EVA foams typically come in a wider range of hardnesses, from very soft materials to relatively hard materials. This gives the EVA foam greater flexibility in situations where different hardness levels are required.

waterproof tool box with EPE foam
hard case with EPE foam
plastic box with EPE foam
EPE foam for tools

In terms of color, both EPE foam and EVA foam can be customized in various colors by adding pigments or masterbatch. Whether it’s bright red, blue, or soft white, black, or even a mix of colors, both materials have it covered. The variety of colors allows them to show good visual effects in different applications.

Environmental performance

Both EPE foam and EVA foam have certain advantages in terms of environmental protection performance. EPE foam has a relatively small burden on the environment due to its physical foaming process and recyclability. In some applications, EVA foams can also reduce their impact on the environment by using environmentally friendly raw materials and processes. However, it should be noted that some EVA foams may use some chemical additives during the production process, which may have a certain impact on environmental performance. Therefore, when choosing materials, you need to pay attention to their environmental certification and sustainability.

Density and weight

EPE foams generally have a lower density, which makes it relatively lightweight. This lightweight property makes EPE foam particularly popular in the packaging and logistics fields, as it can reduce overall weight and reduce shipping costs. In comparison, EVA foam may have a slightly higher density, but it is also lightweight and suitable for applications that require a certain amount of structural strength.

tool box with EPE foam
EPE foam
EVA foam for camera
customized EVA foam for tools

Hardness range

EVA foams generally have a wider range of hardness than EPE foams. The hardness of EPE foam can be controlled by adjusting the production process, but overall the range of hardness changes is relatively small. EVA foam can achieve a variety of hardness levels from very soft to relatively hard, which makes it more flexible in applications such as shoe soles and toys. Carry Most factory is using EVA foam in 40 degree hardness while EPE foam is in 20 density (1CBM / 20KGS).

Thermal conductivity and thermal insulation performance

The thermal conductivity of EPE foam is low, which means it has good thermal insulation properties. This characteristic makes EPE foam widely used in situations where the temperature of items needs to be kept stable, such as in refrigeration and insulated boxes. Although EVA foam also has certain thermal insulation properties, it may be slightly inferior in comparison.

Compression deformation and resilience

EVA foam performs well in terms of compression deformation and resilience. It can withstand large compressive forces without being easily deformed, and quickly returns to its original shape after the external force is removed. This property makes EVA foam particularly popular in shoe soles and toy manufacturing, as it provides long-lasting elasticity and comfort. Although EPE foam also has a certain degree of resilience, it may be slightly insufficient in some demanding applications.

Summary

In addition to the application of EPE foam and EVA foam, we have also fully optimized the overall design and details of the tool box. For example, we have increased the storage space of the tool box, optimized the access path for tools, and improved the practicality of the tool box. At the same time, we also use environmentally friendly spray materials and processes to make the toolbox more beautiful in appearance and comply with environmental requirements.