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Ethylene Vinyl Alcohol Copolymer (EVOH)

Ethylene vinyl Alcohol Copolymer (EVOH) is a formal copolymer of ethylene and vinyl alcohol. This copolymer is formed by the polymerization of ethylene and vinyl acetate. EVOH with a high ethylene content allows for lower extrusion temperatures. EVOH is commonly used as an oxygen barrier in food packaging.

EVOH Specification

Specification Ethylene content mole % Densityg/cm3 Melting point ℃ Tg℃ MFI Oxygen permeability
(cc20um/m2-day- atm)		 Application
EV2904 V/F 29 1.2 188 65 8.5 0.3 Drooling film/tube/bottle
EV2951 V/F 29 1.2 188 65 3 0.3 Drooling film/tube/bottle
EV3201 V/F 32 1.19 183 62 1.6 0.4 Bottles/ Sheets/ Films/ Tubes/ Fuel Tanks
EV3251 V/F 32 1.19 183 62 1.6 0.4 Bottles/ Sheets/ Films/ Tubes/ Fuel Tanks
EV3851 V/F 38 1.17 173 58 1.6 0.7 Bottles/ Sheets/ Films/ Tubes/ Fuel Tanks
EV4405 V/F 44 1.14 165 55 5.5 1.5 Sheet/Membrane/Pipe
EV4451 V/F 44 1.14 165 55 1.8 1.5 Sheet/Membrane/Pipe

EVOH Properties and Characteristics

Gas Barrier Properties
EVOH is renowned for its excellent gas barrier properties. It effectively blocks oxygen and aromatic compounds, making it particularly suitable for food packaging applications.

Chemical Resistance
EVOH is highly resistant to solvents and oils, maintaining its shape and functionality even under harsh conditions.

Mechanical Resistance
Despite its thin structure, EVOH exhibits excellent tensile strength and flexibility, making it suitable for a variety of demanding applications.