2021 Volume 57 Issue 7 Pages 280-290
Maximized reinforced adhesion between polytetrafluoroethylene（ PTFE） films and stainless steel plates
is achieved using atmospheric-pressure nonthermal plasma（ NTP） graft polymerization involving argon and
acrylic acid vapor. This process allows for the preparation of flexible high-frequency coaxial cable assemblies
with PTFE as the dielectric material, which is difficult with other processes. The adhesion required for cable
assemblies was evaluated by bonding the treated PTFE films with stainless steel plates and evaluating the
peeling strength. Average adhesion strength of 4.9 N/mm was achieved at an acrylic acid evaporation temperature
of 50 ℃ and an argon flow rate of 40 L/min. The physical properties of the adhesive surfaces were
analyzed by scanning electron microscopy and X-ray photoelectron spectroscopy. Spherical polymer particles
were found on the PTFE film surface, thus significantly improving its adhesive strength. The results presented
herein can help in optimizing PTFE processing conditions and expand its applications to other areas, including
healthcare.
