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DryFilm RA dispersions are a line of polytetrafluoroethylene (PTFE) dispersions from Chemours that are ideally suited to formulate dry film lubricants. Unlike the PTFE used in many other based dry film lubricants, Chemours DryFilm PTFE is produced by a special, solvent-based polymerization technique that creates PTFE particles with a smaller molecular weight and higher surface area. This leads to dry film lubricants that produce a film with an extremely low static coefficient of friction, excellent high temperature stability, and outstanding chemical resistance. The high surface area of Chemours DryFilm PTFE particles also allow it to cover surfaces using less polymer, making it more cost effective.
Typical applications where DryFilm dispersions excel in dry film lubricants include:
Lubricants containing DryFilm RA dispersions can be applied to substrates in any of several methods including dipping, wiping, brushing, or spraying onto a prepared surface. Best practices for applying DryFilm lubricants are outlined below.
As is true with most coatings, the surface should be clean and dry prior to the application of DryFilm lubricants. Controlling the surface roughness improves coverage, especially in air-dried applications.
Chemours DryFilm RA Dispersions are extendable and allow users to customize the dispersion for ease of applications and adequacy of coverage. DryFilm RA Dispersions come dispersed in three different solvents and can be extended with additional amounts of base solvent.
Grade | Solids, wt%
|
Solvent
|
---|---|---|
DryFilm RA Dispersion | 15
|
HFC 43-10
|
DryFilm RA-IPA Dispersion | 25
|
IPA
|
DryFilm RA-W Dispersion | 20
|
Water
|
DryFilm can be applied to many different types of substrates including plastics, metals, elastomers, and leather. Recommended application methods include dipping, brushing, wiping, and spraying.
Like with any other applied coating, drying is best done in an area that is relatively free from dust. Drying times for DryFilm are dependent on the dispersion type and the thickness of the application but in general increasing the temperature of the drying area will reduce drying times.
Because of the high temperature stability of the PTFE in DryFilm dispersions, heat fusion to the applied surface to improve adhesion is possible. Once the lubricant is dry, the deposited solids can be melted by raising the temperature of the surface to 305 - 310°C for 5 to 10 min.
Dry film lubricants are good alternatives to fluid lubricants in applications that require permanent lubrication at high temperatures. DryFilm RA Dispersions from Chemours™ are dispersions of low molecular weight PTFE particles that produce dry films with outstanding lubricity and excellent resistance to high temperatures and chemical attack. DryFilm RA Dispersions are ideal for use in dry lubricants for materials that must hold up to repetitive motion. Contact ChemPoint today to learn more and request your sample of DryFilm today.
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