Abstract
An important characteristic of wavy shape structure on the KrF excimer laser-ablated poly (ethylene terephthalate) (PET) film surfaces was studied. When the atomosphere of laser irradiation was changed from air to water and to argon, the PET surface structure and its chemical component (O/C ratio) were not affected under an inert gas for PET. The orientation of undrawn and drawn PET films was analyzed by a polarization ATR (attenuated total reflection) spectroscopy. The results showed that these films strongly oriented to the drawing direction were not affected by laser. In order to analyze the orientation pattern of the wavy shape parts of the surface, we used a microscopic Raman scattering spectroscopy and found differences not in the orientation pattern between these parts, but in the orientation of the thick direction between the irradiated and non-irradiated parts. The dye diffusion state in the film section was studied in order to make clear the dyeing properties of laser irradiated and non-irradiated surface. It appeared that the diffusion was larger in the former than in the latter, but when the drawing ratio of film increased, there were little differences in diffusion between them in order to decrease the extent of diffusion.
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