| abstract |
Disclosed is a highly adhesive polyester film wherein a highly adhesive primer layer is provided on at least one side of a base polyester film. The base polyester film is a linearly tearable stretched film which is formed from a mixed polyester resin containing a polyethylene terephthalate and a modified polybutylene terephthalate. The highly adhesive primer layer contains a polyester resin (A) having an acid value of 20-60 mgKOH/g, a hydroxyl number of 30-150 mgKOH/g and an oligomer content of not more than 2.0% by mass, but substantially contains no crosslinking agent component. |