Two dry processings, atmospheric pressure plasma jet exposure and ultraviolet excimer light irradiation, were carried out using poly(ethylene terephthalate) film. The wettability change in the poly(ethylene terephthalate) surface was recorded by the Wilhelmy technique. After the processings, the drastic decreases in the advancing and receding contact angles of water were observed. The advancing angle increased by rinsing with water or aging in air, whereas the receding one remained almost the same. The wettability behavior obtained was discussed on the basis of the X-ray photoelectron spectroscopy and atomic force microscopy data.
- Keiko Gotoh
- Akemi Yasukawa
- Yasuyuki Kobayashi
