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[Chemical Knowledge]：Understand the advantages and disadvantages of EVA materials

Read： 617 Time：14months ago Source：Transform the World with Simplicity

EVA material is a polyester material, mainly by ethylene and vinyl ester copolymer. It is a polymer material with good flexibility, low temperature toughness and good drape. According to its degree of polymerization, EVA can be divided into two types: low-polymer EVA and high-polymer EVA. Oligomeric EVA has higher ethylene content and therefore has stronger toughness and elasticity, while high polymeric EVA has higher strength and hardness.

EVA materials have many advantages in making various products. It is a very lightweight material, so it can be used to make sneaker, backpacks and other outdoor products. It can be melted at a relatively low temperature and is easy to shape, which makes EVA a good modeling material. In addition, EVA has good water resistance and UV resistance, is not easy to change color and aging, long-term use will not produce cracks and deformation.

Although EVA material has many advantages, it also has disadvantages. The strength and hardness of EVA materials are low, so they cannot be used to make high-strength products. The wear resistance of EVA material is poor, and it is easy to produce wear and tear in frequently used products. In addition, EVA materials have low cold resistance and poor stability at high temperatures, so they cannot be used to make products that require high temperature use.

In general, EVA material is a unique thermoplastic polymer material with good flexibility and low temperature toughness, and is very light, so it has been widely used in various products. Although it has some disadvantages, these disadvantages do not affect its use in various articles. In order to better use EVA material, we should fully understand its advantages and disadvantages, and choose the type of EVA material according to the requirements of the product, and strengthen its waterproof, UV resistance and wear resistance.

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