| 摘要 |
PURPOSE:To obtain the titled product having improved slipperiness and antistaticity and excellent windability in film-forming process, and useful as a base of a high-density magnetic recording material, by coating the surface of a film with a coating agent containing a specific vinyl resin and drawing the coated film. CONSTITUTION:At least one surface of a polyester film is coated with a coating agent composed of a vinyl resin containing styrene-sulfonic acid (salt) as a constituent component to a thickness of preferably 0.01-1mum, and the coated film is drawn to obtain the objective product. The coating agent is preferably added with a water-soluble acrylic resin, a water-soluble polyester containing sulfonic acid salt, and silica sol to obtain a film having high transparency, slipperiness and adhesivity, especially excellent adhesivity to the magnetic layer of a magnetic recording medium. |
