B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/08 (2006.01) B32B 27/18 (2006.01) G11B 5/738 (2006.01)
Patent
CA 2083080
ABSTRACT OF THE DISCLOSURE Disclosed is a biaxially oriented thermoplastic resin film formed by laminating a layer A composed of a thermoplastic resin A containing particles on at least one surface of a layer B composed of a thermoplastic resin B. The film has a specified ratio t/d of the thickness of the layer A "t" to the mean diameter of the particles contained in the thermoplastic resin A "d", a specified number of protrusions having a diameter of not less than 0.7µm and not more than 2.6 µm among protrusions existing on the surface of the layer A and a specified ratio L/S of a number S of protrusions having a smaller diameter to the number L of protrusions having a diameter in the above range. An excellent winding property when the film is wound and an excellent dubbing resistance when the film is used for a video tape can be obtained.
Abe Koichi
Nakajima Syoji
Okamoto Katsuya
Smart & Biggar
Toray Industries Inc.
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