Patent ID: 8765860

Claim:
An injection molding composition comprising: a soft ferrite powder, which is a collection of ferrite particles; a first binder; and a second binder, wherein: said first binder is hydrophilic; said second binder is hydrophobic; a softening point of said first binder is from 150° C. to 250° C.; a softening point of said second binder is lower than that of said first binder; a weight and a specific surface area of said ferrite powders are represented by Wp [g] and S [m 2 /g], a weight and a density of said first binder are represented by Wb 1 [g] and Db 1 [g/cm 3 ], and a weight and a density of said second binder are represented by Wb 2 [g] and Db 2 [g/cm 3 ]; said S is 1.5 to 3.7; and a hypothetical thickness Tb 1 [nm] of said first binder is calculated by a formula (1) and a hypothetical thickness Tb 2 [nm] of said second binder is calculated by a formula (2), and values obtained therefrom of said Tb 1 is 2.0 to 15.0 and of said Tb 2 is 16.5 to 32.0: Tb 1=( Wb 1×10 3 )/( Db 1× Wp×S ) formula (1) Tb 2=( Wb 2×10 3 )/( Db 2× Wp×S ) formula (2).