EVA

EVA combines the strength and durability of ethylene with the elasticity and flexibility of vinyl acetate. The properties of the material depend heavily on the proportion of vinyl acetate in the polymer, which is typically between 10 % and 40 %.

Main characteristics of EVA

• High flexibility and elasticity: EVA offers rubber-like elasticity, which makes it ideal for shock-absorbing applications.

• Thermoplastic processing: the material is easy to shape and process, which makes it suitable for a wide range of manufacturing techniques.

• Low weight: EVA is extremely light, which makes it ideal for products where weight plays an important role.

• Water and moisture resistance: it is resistant to water and provides a good barrier against moisture.

• UV resistance: EVA shows good resistance to UV radiation and weathering.

• Chemical resistance: it is resistant to many chemicals, including oils and organic solvents.

• Shock absorption: ideal for shoes, mats, packaging and various moulded articles that require high energy absorption.

• Low density: EVA is lighter than many other plastics and is therefore particularly suitable for applications where weight matters.

• Environmentally friendly options: EVA can be produced in biodegradable variants, which makes it a more sustainable choice.

• Wide range of processing techniques: it can be processed by extrusion, injection moulding, thermoforming and other processes.

EVA is used in numerous industries because of its unique combination of flexibility, strength and resistance. The following table provides an overview of typical applications:

Industry	Typical applications	Advantages
Footwear industry	Shoe soles, midsoles, insoles	Light, shock-absorbing, durable
Packaging industry	Protective packaging, foams	Shock absorption, water-resistant
Construction industry	Insulating films, seals	UV-resistant, waterproof
Automotive industry	Bumpers, interior trim	Flexible, light, robust
Sport and leisure	Yoga mats, sports equipment	Non-slip, shock-absorbing

EVA is a thermoplastic material that can be processed using various methods:

• Extrusion: for the production of films, sheets and profiles.

• Injection moulding: suitable for complex shapes such as shoe soles or components.

• Thermoforming: for packaging or specific industrial applications.

• Foaming: for the production of soft, shock-absorbing products such as mats or cushions.

EVA is often compared with other thermoplastic materials such as polyethylene (PE) or polypropylene (PP). The following table shows the main differences:

Material	Flexibility	Density	UV resistance	Typical applications
EVA	Very high	Low	Good	Shoe soles, protective packaging
PE (polyethylene)	Medium	Very low	Limited	Films, pipes, containers
PP (polypropylene)	Low	Medium	Very good	Automotive parts, packaging

• Is EVA recyclable? Yes, EVA can be recycled, although the infrastructure for recycling EVA products still has room for improvement. There are also biodegradable variants of EVA.

• Is EVA harmful to health? EVA is considered harmless to health and is often used in products that come into contact with the skin, such as shoe soles, mats and various moulded articles.

• How does EVA behave at high temperatures? EVA begins to soften at temperatures above 100 °C, which limits its use in high-temperature environments.

• What alternatives to EVA are there? Alternatives include polyurethane (PU) for shock-absorbing applications or polyethylene (PE) for packaging and films, depending on the specific requirements.

EVA (ethylene vinyl acetate) is an extremely versatile material used in many industries thanks to its flexibility, resistance and ease of processing. Whether as a shock-absorbing sole in the footwear industry, as an insulating film in construction or as protective packaging, EVA impresses with its combination of performance and efficiency and remains a preferred choice for numerous applications.