Abstract: A polyester film recovery method includes: a functional layer removing step (A) of cleaning a laminated polyester film including a polyester film having on a surface thereof a functional layer, with a cleaning agent, so as to remove the functional layer; and a recovering step (B) of recovering the polyester film, from which the functional layer has been removed, and the cleaning agent is selected from the following (1) to (3): (1) a cleaning agent containing an alkalinizing agent (a) and a compound (b) having at least one hydroxy group, (2) a cleaning agent containing an alkalinizing agent (a) and a compatibilizing agent (c), and (3) a cleaning agent containing an alcohol compound having an acidity constant (pKa) of 8.0 or more and 20.0 or less. A polyester film recovery method that can peel a functional layer and can recover the base material film, a recovery apparatus, and a functional layer removal agent can be provided.

Abstract: To provide a polyester recycling system including: a functional layer removing means of removing a functional layer from a laminated polyester film including a polyester film having on a surface thereof the functional layer as a recovered waste material, with a cleaning agent dissolving the polyester film; a recovery means of recovering the polyester film, from which the functional layer has been removed; and a production means of producing a recycled polyester product with the recovered polyester film as a raw material.

Abstract: The present invention provides a polyester film which can be suitably used as an antireflective film, an optical film, etc., and comprises a coating layer capable of exhibiting excellent easy-bonding property and weather-resistant bonding property with respect to various topcoat agents to be applied thereonto. The laminated polyester film of the present invention comprises a coating layer which is formed of a coating solution comprising (A) an antistatic agent, (B) a compound having an isocyanate-based reactive group and a urethane bond, (C) a urethane resin having no isocyanate-based reactive group at a terminal end thereof, and (D) at least one crosslinking agent.

Abstract: The present invention provides a polyester film which can be suitably used as an antireflective film, an optical film, etc., and comprises a coating layer capable of exhibiting excellent easy-bonding property and weather-resistant bonding property to various topcoat agents. The laminated polyester film of the present invention comprises a coating layer which is formed of a coating solution comprising (A) a compound having an isocyanate-based reactive group and a urethane bond, (B) a urethane resin and (C) at least one crosslinking agent.