Consistency in the coating of a dry lubricant to reduce friction from stacked tolerances is very important. Here, the surfaces of three eyelets are compared. The shiny surface on the left is uncoated, while the center eyelet demonstrates an irregular coating that can come with powder coatings with large powdered PTFE particles that settle out due to low “hang time.” On the right is a dry lubricant from MicroCare Medical, which uses microdispersion technology to create a better hang time for the PTFE particles in the carrier fluid.

When used properly, dry lubricants typically reduce the force needed to actuate or execute a device by 25% to 30%, and provide an almost effortless actuation for the medical professional performing the procedure.  When it comes to selecting dry lubricants, there are many variables to consider. First, consistent quality of the coating is essential. Many formulas with PTFE particles require constant agitation because of large PTFE particles that have a limited “hang time” in the liquid carrier and even with constant agitation will quickly fall out, resulting in inconsistent, streaky coatings.

There are other factors worth considering and advancements worth noting.