EVOH stands for Ethylene-Vinyl Alcohol Copolymer. It is a versatile and high-performance polymer used in a wide range of applications because of its unique properties. Here are some key points related to EVOH:

1. Composition: EVOH is a copolymer derived from ethylene and vinyl alcohol. The ratio of these two components can be adjusted to tailor the material's properties.

2. Properties:

Barrier Properties: EVOH shows very good barrier properties to gases like oxygen and carbon dioxide, as well as to organic solvents. For this reason, it is useful in the development of packaging materials where the aspect of freshness and shelf life of the contents is relevant.

Transparency: It exhibits high transparency and therefore finds suitable applications in the packaging of goods that are required to appear visually attractive.

Thermal Properties: The polymer shows good thermal stability, enabling its processing at reasonably high temperatures.

Mechanical Properties: EVOH has good mechanical strength and flexibility, although it can be brittle if not well formulated.