The full English name of EVA is ethylene-vinyl acetate copolymer, and the chemical name is ethylene-vinyl acetate copolymer. Polymerization methods: high pressure bulk polymerization (for plastics), solution polymerization (PVC processing aids), emulsion polymerization (adhesives), suspension polymerization.

EVA is a common type of midsole material in daily life. The finished product made of it has good flexibility, shock resistance, anti-skid, and strong pressure resistance.

It has strong softness, chemical resistance and good elasticity, so it is widely used in various fields of work. The application fields of EVA materials are summarized as follows:

1. EVA foam shoe material

Shoe material is the most important application field of EVA resin in my country. In the EVA resin used in shoe materials, the vinyl acetate content is generally 15% to 22%.

Because resin blended foam products have the functions of softness, good elasticity and chemical corrosion resistance, they are widely used in the soles and interior materials of middle and high-end travel shoes, hiking shoes, slippers and sandals; other, this material is also Used in the fields of sound insulation boards, gymnastics mats and sealing materials.

2. EVA film

The main purpose of EVA film is to produce functional shed film.

The functional shed film has high weather resistance, anti-fog droplet and thermal insulation properties. The shed film made of a certain amount of EVA resin not only has a high light transmittance, but also has a great improvement in the anti-fog droplet function, which can generally be surpassed. 4 months.

In addition, EVA film can also be used to produce packaging film, medical film, lamination film, casting film, etc.

3. EVA wire and cable

With the continuous development of computer and network engineering, people use more and more halogen-free flame retardant cables and silane cross-linked cables for the safety of computer rooms.

Because EVA resin has good filler inclusion and cross-linkability, it is widely used in halogen-free flame retardant cables, semiconductor shielded cables and two-step silane cross-linked cables.

In addition, EVA resin is also used to make some special cable jackets. EVA resin used in wire and cable, the vinyl acetate content is generally 12% to 24%.

4. EVA toys

EVA resin is also widely used in toys, such as baby wheels, seat cushions, etc. According to statistics, my country's toy manufacturers consume about 5,000t of EVA resin every year, and the use of trademarks and shoe materials is basically the same.

5. EVA hot melt adhesive

The hot melt adhesive with EVA resin as the main component is suitable for automatic assembly line production because it does not contain solvent, does not pollute the environment and has high safety. Installation, footwear, carpet coating and metal anti-corrosion coating.

Hot melt adhesives mainly use varieties with vinyl acetate content of 25% to 40%. Although there are products with this trademark in China, they have not been produced for a long time, so they are all occupied by imported materials.

6. Other EVA products

EVA resin is also widely used in the fields of ink, luggage, wine bottle cover and so on. It is estimated that the consumption of EVA resin in these areas is not less than 15kt.