Abstract: A laminated polyester film includes a layer (S) of polyester and a layer (C) including a polyester resin (A) having a fluorene backbone, wherein a surface of the layer (C) has an adhesive index after a heat and wet test of 3 to 5.

Abstract: A laminated adhesive thermoplastic resin film includes a laminated layer containing a polyester resin (A) and a polyester resin (B) different from each other in glass transition temperature and a melamine-based crosslinking agent (C) as components and having a surface energy of 48 to 55 mN/m, formed at least on one surface of the thermoplastic resin film, wherein the glass transition temperature of the polyester resin (A) is 110° C. or higher; the glass transition temperature of the polyester resin (B) is 60° C. to lower than 110° C.; and the amount of the melamine-based crosslinking agent (C) is 75 to 200 parts by weight per 100 parts by weight based on the weight of the polyester resin (A) and the polyester resin (B).

Abstract: A laminated polyester film includes a layer (S) of polyester and a layer (C) including a polyester resin (A) having a fluorene backbone, wherein a surface of the layer (C) has an adhesive index after a heat and wet test of 3 to 5.

Abstract: A laminated adhesive thermoplastic resin film includes a laminated layer containing a polyester resin (A) and a polyester resin (B) different from each other in glass transition temperature and a melamine-based crosslinking agent (C) as components and having a surface energy of 48 to 55 mN/m, formed at least on one surface of the thermoplastic resin film, wherein the glass transition temperature of the polyester resin (A) is 110° C. or higher; the glass transition temperature of the polyester resin (B) is 60° C. to lower than 110° C.; and the amount of the melamine-based crosslinking agent (C) is 75 to 200 parts by weight per 100 parts by weight based on the weight of the polyester resin (A) and the polyester resin (B).

Abstract: An acrylic resin film, in which acrylic elastic particles are mixed with an acrylic resin containing glutaric anhydride units, has a total light transmittance of 91% or more, a haze value of 1.5% or less, a folding endurance value (times) of 20 or more, and a heat shrinkage rate of less than 5% at least in either the machine direction or the transverse direction in a heat shrinkage test.

Abstract: The present invention is an aromatic polyamide film, which is a laminated film consisting of at least two layers, comprising an aromatic polyamide and 0.1 wt % to 10 wt % of at least one or more different polymers, being contained at least in the outermost layer (layer A) of the film, subject to the condition that the following formulae are satisfied 0.01≦t/d≦0.5 0.05≦s/L≦1 where d is the thickness of the layer A (&mgr;m); t, the circle equivalent diameter of the isles of the different polymer (&mgr;m); L, the major axis of the isles (&mgr;m); and s, the minor axis of the isles (&mgr;m). The aromatic polyamide film of the present invention is especially useful an a base film of a magnetic recording medium with high productivity since it is free from the wrinkling and weaving caused at the time of film winding and excellent in abrasion resistance on the film surface.

Abstract: The present invention relates to aromatic polyamide film which is characterized in that on at least one face thereof the number of projections of height at least 20 nm but less than 50 nm is from 10.sup.3 to 10.sup.8 per mm.sup.2, and the number of projections of height at least 50 nm but less than 100 nm is from 0 to 3.times.10.sup.4 per mm.sup.2.Further, the present invention also offers a method of producing an aromatic polyamide film which is characterized in that, in a method of producing aromatic polyamide film from a solution obtained by adding to an aromatic polyamide solution a particle-containing slurry formed by dispersing particles of particle diameter 10 to 300 nm in a liquid medium of 10 poise or less, such that the amount of said particles added in terms of the aromatic polyamide is 0.005 to 4.5 wt %, the relative standard deviation in the diameters of said particles is no more than 0.