| 摘要 |
<p>PURPOSE: A low electrostatic composite polyester film is provided which is a useful as a base film for a magnetic recording medium that has low electrostatic properties and is excellent in not only blocking resistance and abrasion resistance but also electromagnetic conversion characteristics and adhesion to a back coat. CONSTITUTION: A low electrostatic composite polyester film comprises a base film C, a coating layer A formed on one side of the base film C, and a coating layer B formed on the other side of the base film C. The coating layer A is formed of a water-soluble or water-dispersible resin containing inert particles and has a center line average roughness of the surface of 0.1 to 2 nm. The coating layer B comprises 1 to 40 wt% of inert particles and a composition containing a water-soluble or water-dispersible resin, the resin-containing composition containing 5 to 85 wt% of a silicone-modified polyester resin or 1 to 30 wt% of silicone or wax based on the layer B. And the base film C is formed of an aromatic polyester.</p> |
