Patent ID: 8410209

Claim:
Anti abrasion layer comprising: a mixture of irregular particles of hard material and round solid material particles, essentially free of cutting edges, embedded in a matrix material, wherein: the particles of hard material have a Mohs hardness rating of at least 6, and the solid material particles have a Mohs hardness rating of at least 3, characterized in that: the average particle diameter of the solid material particles is equal to or less than the average particle diameter of the particles of hard material; the round solid particles essentially free of cutting edges are made of a material selected from the group consisting of glass and sintered ceramic; and the ratio of round solid material particles, essentially free of cutting edges, in the embedded mixture is 10 to 50 wt. %, based on the total amount of embedded particles; and the matrix material comprises a synthetic resin, comprising a material selected from the group consisting of melamine, epoxy, polyurethane, poiyamide, polyimide, latex, rubber, and a mixture thereof.