申请人:DIAFOIL HOECHST CO., LTD
公开号:EP0568008A1
公开(公告)日:1993-11-03
A laminated polyethylene 2,6-naphthalate film having a polyethylene 2,6-naphthalate film and a coating layer which is formed on at least one surface of the polyethylene 2,6-naphthalate film and comprises at least one water-soluble or dispersible resin selected from the group consisting of polyesters, polyurethanes and polyacrylic resins, and satisfying the following properties: (1) an F₅ value in a machine direction of at least 1.5 x 10⁸ Pa, (2) a Young's modulus in a machine direction of at least 5.9 x 10⁹ Pa, (3) a Young's modulus in a transverse direction of at least 5.9 x 10⁹ Pa, and (4) a surface roughness Ra of the coating layer of not larger than 0.020 µm, which laminated film is suitable as a base film of a magnetic recording medium.
一种层压聚 2,6-萘二甲酸乙二醇酯薄膜,具有聚 2,6-萘二甲酸乙二醇酯薄膜和涂覆层,涂覆层形成于聚 2,6-萘二甲酸乙二醇酯薄膜的至少一个表面,并包含至少一种选自由聚酯、聚氨酯和聚丙烯酸树脂组成的组的水溶性或分散性树脂,且满足以下特性:(1) 机器方向的 F₅ 值至少为 1.5 x 10⁸ Pa,(2) 机器方向上的杨氏模量至少为 5.9 x 10𠞙 Pa,(3) 横向方向上的杨氏模量至少为 5.9 x 10𠞙 Pa,(4) 涂层的表面粗糙度 Ra 不大于 0.020 µm,这种层压薄膜适合用作磁记录介质的基膜。