MAGNETIC RECORDING BODY

摘要

PURPOSE:To obtain a magnetic recording body, such as a video tape, which has excellent coating durability and reduces magnetic head abrasion, jitters, and sliding noises, by adding abrasive grains having specific hardness and needlelike alpha iron oxide to a magnetic layer which contains a ferromagnetic material. CONSTITUTION:In the magnetic layer 1 of a magnetic recording body obtained by providing the magnetic recording layer 1 on the surface of a nonmagnetic base 2, a ferromagnetic material 3, abrasive grains 5 having >=6 Mohs hardness, and needlelike alpha iron oxide 6 coexist. The ferromagnetic material powder 3 uses gamma-Fe2O3, gamma-Fe2O3 containing Co, FE3O4, etc., having about 0.2-1mum grain length, and the abrasive grains 5 uses 0.5-15wt% molten alumina, silicon carbide, chromium oxide, etc., for the magnetic material 3. The needlelike alpha-iron oxide 6 has 1.2-0.1mum length, a 15/1-3/1 needlelike ratio, and a greater diameter than the magnetic material 3 and is added to the magnetic material 3 by 5-30wt%.