| 摘要 |
<p>An aromatic polyamide film laminate comprising at least two biaxially oriented films formed of an aromatic polyamide, wherein (1) a film layer A, which is the outermost layer of the laminate, contains inorganic particles produced from hydroxides or carbonates of at least one metal of the groups Ia and IIa of the periodic table, the inorganic particles having an average particle diameter of 80 to 1,500 nm, and has a surface roughness (Ra<A>) of 1 to 20 nm, and (2) a film layer B, which is the layer opposite to the layer A of the laminate, has a surface roughness (Ra<B>) of 0.1 to 10 nm, (3) the surface roughness (Ra<B>) of the film layer B being smaller than the surface roughness (Ra<A>) of the film layer A by 1 nm or more. According to the present invention, there can be provided an aromatic polyamide film laminate suitable for use as a base film for a magnetic recording medium, which attains high abrasion resistance and high flatness at the same time while having excellent handling properties such as strength, slipperiness and winding property and which also exhibits excellent performance stability under a high-temperature and high-humidity environment; a production process therefor; and a metal-thin-film high-density magnetic recording medium and a multiple-coat high-density magnetic recording medium which have excellent electromagnetic conversion characteristics and are suitable for high-density recording by using the aromatic polyamide film laminate.</p> |
