CAVITY-CONTAINING POLYESTER FILM

摘要

PURPOSE:To improve picture drawing properties of a polyester film containing a large amount of fine cavities in its interior. CONSTITUTION:A cavity-containing polyester film is composed of polyethylene terephthalate and polystyrene. In the constituent ratio of surface elements in the aforementioned film, the ratio of oxygen to carbon measured by electron spectroscopy for chemical analysis(ESCA) is >=15%. Wettability and adhesion to water-based coatings are improved.