9.3.3.Ethylene Vinyl alcohol Copolymer (EVOH)

Unit 9 - Plastics for Packaging

9.3.3.Ethylene Vinyl alcohol Copolymer (EVOH)
Higher water vapour barrier than polyolefins
  • Extremely low oxygen permeability, in the absence of moisture
  • High oil resistance
  • Very expensive
Its outstanding gas barrier properties enable it to be used for packaging foods sensitive to oxygen but it must be protected from ingress of moisture by laminating as below.
LLDPE-Water barrier / EVOH-Gas barrier / LLDPE-Heat sealing medium

Last modified: Wednesday, 22 June 2011, 10:33 AM