Aromatic polyamide resin moldings, production methods thereof, and magnetic recording medium produced therefrom

An aromatic polyamide resin molding comprising at least one surface that has an Rq root-mean-square roughness of 1.0 nm or more and a 10-point average roughness of 80 nm or less, both of said roughnesses being as determined by atomic force microscopy, and said molding having a tensile Young's modulus of at least 9.8 GPa or more in at least one direction wherein said molding further has a non-particle index of 80% or more for protusions 5 nm or more in height, on its surface,

• and wherein the average diameter of the protrusions on said surface is 30 nm to 300 nm, and wherein the height of the highest non-particle protusion on the surface of said molding is 20 times or less of the average roughness of said surface, and wherein the number of protrusions that are 5 nm or more in height that are formed on said surface is 2×105/mm2 or more, and the cross sections of said protrusions, taken in a horizontal plane at a height of 5 nm above said surface comprises 1 to 20% of the total area of said surface, and wherein the average height of said particle protrusions on the surface of said molding is 10 nm to 75 nm, said protrusions having an H/D ratio in the range of {fraction (1/40)} to ½, wherein H represents the average height and D represents the average diameter of said protrusions, and wherein said aromatic polyamide layer that comprises said surface consists essentially of an aromatic polyamide plus a dissimilar polymer that is not an aromatic polyamide, and wherein said dissimilar polymer comprises 0.1 wt % to 10 wt % of the total of the aromatic and the dissimilar polymers.