|Titel||Using silicone masterbatch for controlling the friction coefficient of polyacetal gears|
|Autor||J. Habimana, C. Chevalier, B. Meunier, F. Gubbels, C. Letouche|
|Infos zum Autor|
As the automotive technologies continue to progress, more and more electronic components are being used in car modules to assist the car driver in many aspects of the car safety. Once installed in the car, these electronic module need to function correctly during the life cycle of the car, thus they must be well protected against harsh environment, moisture, and any out gassing contaminant. For that reason, there is an increasing concern of using plastic material that can potentially leach out volatiles components that can further recondense over electronic components in the car. One typical example is the use of plastics gears as alternative to metallic gears. Plastic or plastic composite gears can be smaller, lighter with higher accuracy than metal gears. Their manufacturing processes are much simpler and of lower the cost than for metal gears. For some plastic gears, lubricants are required for noise and vibration damping. Dow Corning have developed a series of silicone based masterbatches that shows very good lubrication properties when added at low level in the plastic resin such as polyacetal during compounding. The main advantage of using silicone masterbatch is that it allows to get stable low friction coefficient and to enable the use of the plastic in most demanding applications such as for example office appliances gears, conveyor belts, bearings or medical tubing connectors.
In this talk, we will discuss the performances of these materials as related to their molecular structures; we will show that Dow Corning silicone masterbatches contain low concentration of silicone volatiles species, far below the threshold for getting any adverse effect on electronic or electric components in the car.