Back to results
US 5,474,842 AGranted
Aramid particles as wear additives
OwnerDavid E. Hoinessinventor
Life of this patent
Estimating the term…
Abstract
A composite friction or gasketting material is disclosed having a combination of thermoset or thermoplastic matrix resin, fiber reinforcing material, and aramid particles. The composite material exhibits improved wear resistance when compared with materials having no aramid particles.
Claims16
A composite material comprising:
- a) 10 to 95 percent, by weight, matrix resin;
- b) 1 to 60 percent, by weight, fiber reinforcing material;
- c) 1 to 65 percent, by weight, aramid particles 50 to 500 microns in average diameter, substantially free from tentacles and having a surface area of less than 2 square meters per gram, wherein the weight ratio of aramid particles to fiber reinforcing material is greater than 1/4.
Dependencies are inferred from the claim text.