| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester film of easy lubricating properties, easy bonding properties and antistatic properties and also provided with durability under the high temperature and high humidity conditions. SOLUTION: Polyester resin B is laminated on polyester resin A, over which water-soluble or water-dispersible resin is laminated in a composite film, and the relation of melting energyΔHA of resin A with melting energyΔHB of resin B isΔHA>ΔHB, and resin B is not substantially provided with a melting point. |
