| 摘要 |
A barrier film comprising a polyester-based polymer with (a) an O2 gas permeability of 0.25 cc-mil/100 in.2 24 hrs atm (5 cc 20 μm/m2 24 hrs atm) at 80% relative humidity (ASTM D-3985) or less, (b) a moisture permeability of 0.5 g-mil/100 in.2 24 hrs atm (9.8 g 20 μm/m2 24 hrs atm) at 38° C. (ASTM F-1249) or less, (c) haze of 1% or less (ASTM D1003), and (d) a glass transition temperature of 100° C. or higher. The polyester-based polymer may comprise reaction product of (a) one or more diacid or diester thereof, and (b) one or more polyol, wherein component (a) comprises 5 to 100 mole %, based on the total amount of component (a), of 2,5-furan dicarboxylic acid, or one or more C1 to C10 alkyl diester thereof, and component (b) comprises ethylene glycol, a mixture of 1,3-cyclohexanedimethanol and 1,4-cyclohexanedimethanol, or 2,2,4,4-tetramethyl-1,3-cyclobutanediol, or combinations thereof. |
