Preparation of PTFE Film with Adhesive Surface Treated by Atmospheric-Pressure Nonthermal Plasma Graft Polymerization

摘要

A surface modification technique for improving the adhesion of fluorocarbon polymer films such as PTFE (polytetrafluoroethylene), PFA (perfluoroalkoxy fluoroplastics) and PCTFE (polychlorotrifluoroethylene) is developed by using atmospheric-pressure argon and acrylic acid vapor nonthermal plasma. The results of the T-type peeling test show that the peeling strength of the treated PTFE film is approximately over 100 times greater than that of the untreated film. It is confirmed from XPS (X-ray photoelectron spectroscopy) and SEM (Scanning electron microscope) analyses that no chemical connections with F atoms exist on the surface and a hydrophilic layer is formed due to the plasma graft polymerization process. Using the present surface treatment appratus, it is possible to bond A4 sized PTFE and metals without losing excellent physical properties of PTFE itself.