公开(公告)号：DE69329188T2

公开(公告)日：2001-04-05

申请号：DE69329188

申请日：1993-05-10

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SYOJI

IPC: B29C55/00 ,  C08J5/18 ,  G11B5/73

公开(公告)号：DE69329188D1

公开(公告)日：2000-09-14

申请号：DE69329188

申请日：1993-05-10

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SYOJI

IPC: B29C55/00 ,  C08J5/18 ,  G11B5/73

公开(公告)号：DE69227354T2

公开(公告)日：1999-05-06

申请号：DE69227354

申请日：1992-11-16

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SYOJI

IPC: B32B27/18 ,  G11B5/73 ,  G11B5/738 ,  B32B27/36 ,  G11B5/704 ,  G11B5/64

Abstract: A biaxially oriented thermoplastic resin film suitable as a base film of a magnetic recording medium comprises a laminate having 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 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" in the range 0.1 to 5, a number of protrusions having a diameter d1 of not less than 0.7 mu m and not more than 2.6 mu m among protrusions existing on the surface of the layer A in the range 100 to 10,000/mm and a ratio L/S of a number S of protrusions having a smaller diameter d2 (0.2 mu m

公开(公告)号：DE69227354D1

公开(公告)日：1998-11-26

申请号：DE69227354

申请日：1992-11-16

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SYOJI

IPC: B32B27/18 ,  G11B5/73 ,  G11B5/738 ,  B32B27/36 ,  G11B5/704 ,  G11B5/64

Abstract: A biaxially oriented thermoplastic resin film suitable as a base film of a magnetic recording medium comprises a laminate having 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 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" in the range 0.1 to 5, a number of protrusions having a diameter d1 of not less than 0.7 mu m and not more than 2.6 mu m among protrusions existing on the surface of the layer A in the range 100 to 10,000/mm and a ratio L/S of a number S of protrusions having a smaller diameter d2 (0.2 mu m

公开(公告)号：CA2083080A1

公开(公告)日：1993-05-19

申请号：CA2083080

申请日：1992-11-17

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SYOJI

IPC: B32B27/18 ,  G11B5/73 ,  G11B5/738 ,  B32B27/08

Abstract: 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 0.7.mu.m and not more than 2.6 .mu.m 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.