CHEMICAL AND THERMAL STABILITY OF NONWOVEN FILTRATION MEDIA IN FLUID POWER APPLICATIONS

摘要

There are many fluids used in hydraulic systems but they can be broken down into three categories; petroleum based oils, fire resistant fluids and biodegradable fluids. Nonwoven filtration media are widely used in fluid power applications. Many different fluids are used under a wide range of operating conditions. Nonwoven filtration media are thermally bonded or resin bonded with polymers that are susceptible to thermal and chemical attack. The polymers can swell, fracture and/or soften which may change the filtration performance. The change in filtration performance can be gradual or sudden based on the concentration, exposure time, temperature and additives. This paper evaluated different wetlaid microglass filtration media for compatibility with a range of hydraulic fluids at different temperatures.