How Do I Apply the MicroCare Dry Lubes?

Polytetrafluoroethylene (PTFE) is a generic name for Teflon®. In general, this is a highly fluorinated material used to provide excellent lubrication for metal, plastic and ceramic components.

Most MicroCare microdispersions are sold “ready to use” with the concentration of PTFE solids optimized for most uses (1%-2% solids, by weight, but up to 9% for specialized applications). In most instances the carrying agent is one of several versions of Vertrel® solvents from DuPont. These are superior cleaners in most applications because they are nonflammable, fast-drying, residue-free and highly compatible with the carrying agents in the microdispersions. Normal precautions (safety glasses, etc) should be used when moving, opening and using drums and pails of these materials.

All surfaces should be clean and dry prior to application of the microdispersions.

Many customers prefer that the dry lubricants be applied as a dip. Dipping is particularly useful for smaller parts: complex mechanical shapes, coils of wire, intricate plastic assemblies. Product performance is determined by the concentration of PTFE solids, the rate of coating and/or extraction, rate of withdrawal, the number of applications, the carrying agent, agitation and evaporation, and heat treatment. A single dip is adequate for most applications.

In most instances, the most cost-effective dipping process uses a standard vapor degreaser system. With this technique, the heating subsystem is not used and the carrying agent is kept at room temperature. The refrigeration subsystem retains the carrying agent within the machine. The machine’s hoist plunges the parts into the carrying agent with a pre-programmed dwell time. Ultrasonics can be used to enhance dispersion. Some form of mechanical agitation (impellers, bubblers, under-surface sprays) is normally required. Contact MicroCare for machine details and manufacturers.

Other application techniques include wiping, brushing or aerosol sprays. These methods are especially useful for coating smooth continuous surfaces such as rods, tubing or sheets. Airless sprays can be applied with a hand-held gun or with automatic spray heads. Best results are produced by a series of thin coats, allowing the surface to dry between applications. Single thick coatings, which will take longer to dry, result in uneven coverage and deliver poor adhesion.

NOTE: Air spraying is not recommended as the solvent carriers evaporate too quickly for good adhesion.

• There is some background information about PTFE itself on this web site.
• Methods for heat-treating the coatings for great durability are included here.
• Here is a general list of MicroCare dry film lubricants.
• One of the lubricants, the VDX Spray, is the only one available in an aerosol package.

• Here is a note about MicroCare package sizes and packaging options.