By applying a mixture of PTFE and binder resins or a mixture of polyurethane and binder resins, for example in an O Ring coating, the surface is provided with an elastic layer having a thickness of about 25 to 35 microns. The connection is firmly bonded to the elastomer and remains elastic. The coefficient of friction is significantly improved. In recent years, there are new demands and trends in an O-ring coating and seals. The automatic assembly, a silicone and an improved paint adhesion, a reduction of friction in dynamic applications, and chemical resistance are increasingly in demand.
Automatic installation:
The rubber parts must be treated such that they can be separated without any problems and that the assembly take place smoothly.
Silicone and improved paint adhesion
In painting all rubber parts must be treated such that the adhesion of the coating is guaranteed.
Reduction of friction:
Stick-slip phenomena and high breakout forces can be prevented, depending upon the area of application.
Chemically resistant:
Swelling and dissolution of the rubber parts are to be prevented.
Other advantages of an O-ring coating:
durable low friction coefficient
long lasting good dry running properties
no stick-slip effect
improved resistance to aging
used in dynamic applications
may be applied to portions of the rubber seal
