Filled PTFE Components

The Most Commonly Used Fillers and their Influences on Compound Properties

PTFE-Type Influence of Fillers Filler Content in % of Weight Limits of Use
PTFE filled with glass fibers • higher pressure and wear resistance as well as better thermal conductivity • very good chemical resistance • good dielectric properties up to 40% resistant to organic solvents, non-resistant to alkaline solutions and acids
PTFE filled with carbon fibers • very low deformation under load • good wear resistance, even in water • higher thermal conductivity and lower thermal expansion than glass fibers • very good chemical resistance up to 25% carbon fibers are chemically inert
PTFE filled with carbon • high pressure resistance and hardness • good sliding properties and wear behavior • good thermal conductivity • good chemical resistance • low volume and surface resistivity • electrically conductive up to 35%, also in combination with graphite compound is brittle, filler may be attacked by oxidizing media
PTFE filled with graphite • good lubricating effect • low friction coefficient • no static charging • good thermal conductivity • very good chemical resistance typically up to 5%, in exceptional cases up to 15%, also in combination with glass fibers or carbon high abrasion when used with hard metals, is attacked by oxidizing media
PTFE filled with molybdenum disulfide (MoS2) • good sliding properties and wear behavior • good no-lube operation in combination with bronze up to 10%, also in combination with glass fibers or bronze not resistant when used with hot, concentrated sulfuric acid
PTFE filled with bronze • good sliding properties and wear behavior • low cold flow • good thermal conductivity • lower chemical resistance • high pressure resistance up to 60%, also in combination with MoS may be attacked by acids and water
PTFE filled with organic fillers (high-performance thermoplastics) • outstanding sliding properties and wear behavior • good chemical resistance • high pressure resistance in some cases • suitable for soft mating surfaces, e.g. aluminum • non-abrasive up to 20%, may be higher in combination with different fillers depending on the respective filler
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