Modified xbarrier filmsheet from mitsubishi plastics, inc., tokyo, japan, blocks transmission of oxygen, water vapor, fragrance. oriented polyethylene terephthalate opet generally serves as base for custom barrier structures, But other films can be used.Mitsubishi&rsquos techbarrier technology vacuumcoats film with silicon oxide, resulting in water vapor, oxygen transmission rate significantly lower than that of traditional barrier materials like ethylene vinyl alcohol, polyvinylidene chloridecoated pet Custom construction tailors properties such as gelboflex durability, heat resistance, stability of gas barrier property under high temperaturehigh humidity, climate durability, chemical durability, antistatic quality, electric insulation, heat resistance, flame resistance, transparency.