| 摘要 |
The present invention provides a coating film having exceptional characteristics, the coating film allowing the precipitating of oligomers from the surface of a film to be suppressed to a high extent; e.g., under exposure to high temperatures; and, when the film is stored, used, processed, etc., preventing any incidence of adverse events owing to the oligomers (ester cyclic trimers). A coating film having a coating layer formed from a coating liquid containing a multivalent aldehyde compound, the coating layer being formed on at least one surface of a single-layer polyester film containing 0.7% by weight or less of ester cyclic trimers or a multi-layer polyester film having a polyester surface layer containing 0.7% by weight or less of ester cyclic trimers. |
