Abstract
Biaxially oriented polyethylene terephthalate (PET) films were exposed to oxygen-implicated plasma. They were pressed at 100℃ with their exposed surfaces faced, then bonded tightly without using glue. X-ray photoelectron spectroscopy showed increase in C=O group at the exposed surface, and gas chemical modification method showed increases in -OH and -COOH groups. They might indicate that a mechanism of the two-sheets bonding is related to hydrogen bond or condensation reactions concerning these functional groups
