Ethylene-Vinyl Alcohol (EVOH)
Abbreviation: EVOH
Ethylene-Vinyl Alcohol (EVOH) is a high-performance thermoplastic copolymer known for its exceptional barrier properties against gases and aromas. It is formed through the copolymerization of ethylene and vinyl alcohol monomers, which is a hydrophilic molecule derived from ethylene. EVOH is primarily used as a barrier material in food packaging and industrial applications where gas and liquid permeation prevention is critical.
Short Information:
- Ethylene-Vinyl Alcohol (EVOH) is a thermoplastic copolymer formed by combining ethylene and vinyl alcohol monomers through a polymerization process.
- Its unique structure imparts excellent barrier properties against gases like oxygen, nitrogen, and carbon dioxide, as well as aromatic compounds, making it suitable for oxygen-sensitive food packaging.
- EVOH is transparent, with a glassy appearance, allowing consumers to see the packaged contents clearly.
- It is commonly used as a functional layer in multilayer plastic films and coatings to provide gas and moisture barrier properties.
- EVOH is widely used in the food industry for packaging perishable products, as it helps extend shelf life and preserve freshness.
- Additionally, EVOH finds applications in fuel tanks for vehicles, where its barrier properties prevent the diffusion of fuel vapors.
The exceptional gas barrier properties of Ethylene-Vinyl Alcohol (EVOH) make it an essential material in modern food packaging, ensuring the preservation and quality of various products. Its versatility and ability to form a barrier against gases and liquids while maintaining transparency have led to its use in a range of other applications as well.