| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a polyester laminate that is excellent in productivity and economical efficiency and has excellent gas barrier property even under a high humidity condition.SOLUTION: The laminate comprises a gas barrier layer (II) laminated on a polyester substrate (I). The polyester substrate (I) contains a metal compound by 0.1 to 70 mass%; and a polyester resin constituting the polyester substrate (I) comprises a polybutylene terephthalate (modified PBT) containing 5 to 20 mass% of a polytetramethylene glycol unit having a molecular weight of 600 to 4000, and polyethylene terephthalate (PET) in a mass ratio of PET/(modified PBT) ranging from 70/30 to 95/5. The gas barrier layer (II) comprises a polycarboxylic acid and polyvinyl alcohol.</p> |
