▊Working principle

The polymer coating contains solid lubricant particles dispersed within a resin matrix. The volume concentration and selection of lubricant types are critical to achieving optimal lubrication and corrosion resistance. The liquid coating is applied through various processes, ensuring the base resin adheres firmly to the substrate. During operation, the friction-reducing materials in the coating are released, forming a stable lubricating interface between friction pairs.

▊Friction system performance

When looking for ways to improve system performance, engineers must consider a number of factors including:

▊Advantiage

▊DURAFILM® Coating surface selection

CSB recommends coating both opposing surfaces of the friction pair as the optimal solution. However, considering cost factors in general applications, coating only one friction surface can also meet performance requirements. Balancing process and cost considerations, we suggest that thin-walled bushings can be manufactured by rolling coated sheets into shape. For bushings with an inner diameter smaller than 20mm or a length-to-diameter ratio greater than 2, we recommend applying coating to the mating shaft surface. For irregularly shaped mating surfaces, priority should be given to coating the component surface where the external face serves as the friction surface.

▊Application process

To ensure the effectiveness and longevity of DURAFILM polymer coatings, strict adherence to the correct application process is essential. Surface pretreatment is crucial and may include degreasing, sandblasting, phosphating, anodizing, pickling, or other treatments, depending on the substrate material.
After the pretreated components are dried, the polymer coating is applied using suitable methods, followed by drying and curing to ensure strong adhesion between the lubricant-rich coating and the substrate. For applications requiring high surface precision, surface grinding may be added. However, polishing or grinding is not recommended for coatings on components already lubricated with oil or grease, as it may compromise performance.

▊DURAFILM® Polymer coating solutions

As equipment manufacturers face increasing design diversity and complexity of components, traditional self-lubricating sintered composite bearings and wear-resistant composite plastics processed via injection molding or extrusion can no longer meet industrial demands. With over 20 years of expertise in self-lubricating materials and products, CSB developed DURAFILM® polymer coating technology to address the limitations of conventional manufacturing methods in developing high-performance wear-resistant components. DURAFILM® polymer coatings reduce friction, extend wear life, lower system noise, and enhance corrosion resistance.
CSB delivers complete friction coating services through DURAFILM® polymer coating technology, combining tribological and design expertise to provide customized coating solutions tailored to your specific application requirements.

▊Application

▊DURAFILM® Polymer coating applications

■ Bushing、slide plate、shaft friction surface
■ Medical equipment
■ Transmission chain
■ Solenoid valve
■ Metal gear
■ Trapezoidal lead screw