Analysis of Heat Crystallization Behavior of Polyester Film on Laminated Steel Sheet

Polyester films have been used widely as laminate films of beverage and food cans due to their excellent properties of formability, corrosion resistance, and adhesion to steel sheets. Recently, excellent formability under the condition of a higher processing degree has been required in laminated steel sheets for drawn and ironing (DI) cans, which are used as beverage and food cans. Therefore, polyester films which are almost amorphous are used since high formability is needed in the laminate film. In this study, we investigated the thermal crystallization behaviors of a near-amorphous oriented polyester film and non-oriented film by thermal analysis and Raman spectroscopy. We found that the two types of films display different thermal crystallization behaviors.