公开(公告)号：JP2586545B2

公开(公告)日：1997-03-05

申请号：JP3147188

申请日：1988-02-13

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  NAKAJIMA SHOJI ,  OKAZAKI IWAO

IPC: G11B5/62 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733 ,  G11B5/704

公开(公告)号：JP2538641B2

公开(公告)日：1996-09-25

申请号：JP13083688

申请日：1988-05-27

Applicant: TORAY INDUSTRIES

Inventor： OKAZAKI IWAO ,  ABE KOICHI ,  NAKAJIMA SHOJI

IPC: B29C55/12 ,  B29K67/00 ,  B29K105/16 ,  B29L7/00 ,  C08J5/18 ,  C08K3/26 ,  G11B5/73 ,  G11B5/733

公开(公告)号：JPH071696A

公开(公告)日：1995-01-06

申请号：JP10327094

申请日：1994-04-19

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  TANAKA HIROYUKI ,  OKAMOTO KATSUYA ,  NAKAJIMA SHOJI

IPC: B29C55/12 ,  B29K67/00 ,  B29L9/00 ,  B32B27/36

Abstract: PURPOSE:To obtain a polyester film provided with uniform surface projections without voids by a method wherein a layer mainly composed of a polyester A is laminated on one surface of a layer mainly composed of a polyester B, and fine projections are formed on the surface by crystallizing the polyester. CONSTITUTION:A film is obtained by laminating a layer A mainly composed of a polyester A on one surface of a layer B mainly composed of a polyester B. On the surface of the layer A, projections caused by its microcrystallization are formed. The layer A is laminated with a thickness not more than 3mum. The polyester A is microcrystallized to form 70% or more of the surface projections of the layer A. The crystallizing parameter A Tcg of the polyester A is up to and including 70 deg.C and lower than the crystallizing parameter DELTATcg of the polyester B.

公开(公告)号：JPH071576A

公开(公告)日：1995-01-06

申请号：JP10326594

申请日：1994-04-19

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  OKAMOTO KATSUYA ,  NAKAJIMA SHOJI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  B29L9/00 ,  B32B27/36 ,  C08J5/18

Abstract: PURPOSE:To obtain a desired surface form capable of suppressing the formation of voids, capable of densely forming hardly cut surface projections and high in cutting resistance. CONSTITUTION:A polyester film is a biaxially oriented film based on polyester A and characterized by that the number of projections of at least one surface thereof is 5X10 /mm or more and the ratio (NR) of the number of projections/ the number of particles being the ratio of the number of projections and the number of the particles contained in the surface layer on the film is 5 or more and the area ratio of the projection parts on the surface of the film is 5% or more.

公开(公告)号：JPH06320615A

公开(公告)日：1994-11-22

申请号：JP11166093

申请日：1993-05-13

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SHOJI

IPC: B29C55/12 ,  B29K67/00 ,  B29L9/00 ,  B32B27/36

Abstract: PURPOSE:To obtain both a wear resistance and a dust generation inhibiting effect in running a plastic roll and further obtain superior winding characteristics. CONSTITUTION:In a biaxially oriented film mainly composed of a polyester A, part or all of the polyester A has a crystalline parameter DELTATcg of up 10 to below 40 deg.C, and a Rt/Ra ratio of Rt to a surface roughness Ra is 20 or less.

公开(公告)号：JPH06256544A

公开(公告)日：1994-09-13

申请号：JP1749994

申请日：1994-02-14

Applicant: TORAY INDUSTRIES

Inventor： OKAZAKI IWAO ,  ABE KOICHI ,  NAKAJIMA SHOJI

IPC: B29C55/12 ,  B29K67/00 ,  B29K105/16 ,  B29L7/00 ,  C08J5/18

Abstract: PURPOSE:To obtain the subject film useful for video tapes, etc., mainly comprising a thermoplastic resin and inert particles having a specified size and a specified content, and excellent in surface shaving resistance, dubbing resistance and quality stability. CONSTITUTION:This resin film mainly consists of a thermoplastic resin such as a crystalline polyester, etc., having total reflection Raman crystallization index and inert particles such as an aluminosilicate, silica, a crosslinked PS, etc., contains 0.5-50wt.% inert particle and is 0.005-3mum thick. The average particle size of the inert particles in the film has 0.1-10 times the film thickness. Here, the inert particles in the objective film preferably have 1.0-1.3 size ratio and

公开(公告)号：JPH0644342B2

公开(公告)日：1994-06-08

申请号：JP9472686

申请日：1986-04-25

Applicant: TORAY INDUSTRIES

Inventor： ABE KOICHI ,  ITO KIYOHIKO ,  NAKAJIMA SHOJI

IPC: C08J5/18 ,  B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08L67/00 ,  G11B5/73 ,  G11B5/733 ,  G11B5/704

公开(公告)号：JPH06114923A

公开(公告)日：1994-04-26

申请号：JP26507392

申请日：1992-10-02

Applicant: TORAY INDUSTRIES

Inventor： NAKAJIMA SHOJI ,  ABE KOICHI ,  OKAZAKI IWAO

IPC: B29C55/12 ,  B29L7/00 ,  B29L9/00 ,  B32B27/06 ,  B32B27/20 ,  G11B5/73 ,  G11B5/733 ,  G11B5/704

Abstract: PURPOSE:To provide a biaxially oriented laminated film in which a surface of the film is scarcely cut out at the time of feeding the film and which has no disadvantages of cut-out due to strong contact of an end face of the film with a collar of a guide pin and damage of both ends of the film. CONSTITUTION:A biaxially oriented laminated film has a laminated structure of at least two or more layers, wherein an outermost layer of at least one side surface contains at least two types of components having particles of 0.01 to less than 2wt.% and relationship between the mean particle size d (nm) of the particles contained in the outermost layer and the thickness (t) (nm) of the outermost layer is 0.1d

公开(公告)号：JPH05318582A

公开(公告)日：1993-12-03

申请号：JP15005292

申请日：1992-05-19

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  NAKAJIMA SHOJI ,  ABE KOICHI

IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  B29L9/00 ,  B32B27/20 ,  B32B27/36 ,  B32B33/00 ,  G11B5/73 ,  G11B5/733 ,  G11B5/704

Abstract: PURPOSE:To improve traveling properties and protrusion breaking strength, to reduce a decrease in picture quality and to improve dubbling performance of a biaxially oriented laminated film by forming the film in a laminated structure of three or more layers, incorporating special particles in an outermost layer of its one side surface, and simultaneously processing means such as enhancing intrinsic viscosity of the outermost layer part. CONSTITUTION:A biaxially oriented laminated film is formed of a laminated structure of at least three or more layers. In this case, particles are contained at least in an outermost layer of its one side surface of the film. The relationship between a mean particle size (d) (mum) of the particle and a thickness(t) of the outermost layer is so set as to satisfy 0.2d -2X10 /mm . Further, intrinsic viscosity of the outermost layer of at least one side surface is set to higher than that of an intermediate layer. Thus, fine protrusions on the surface of the film are optimized to improve traveling properties and protrusion breaking strength, a decrease in picture quality at the time of using it as a magnetic medium is reduced, and its dubbing performance is improved.

公开(公告)号：JPH05212789A

公开(公告)日：1993-08-24

申请号：JP30686292

申请日：1992-11-17

Applicant: TORAY INDUSTRIES

Inventor： OKAMOTO KATSUYA ,  ABE KOICHI ,  NAKAJIMA SHOJI

IPC: B29C55/12 ,  B29K105/16 ,  B29L9/00 ,  B32B27/20 ,  B32B27/36 ,  C08J5/18 ,  C08L67/02 ,  G11B5/73 ,  G11B5/733

Abstract: PURPOSE:To provide a film with a good winding property and dubbing property by controlling the relationship between the thickness of a thermoplastic resin layer containing particles and the average particle size as well as the number of peaks which exsist on the surface of the layer and have diameters in a given range within a specified limits, respectively. CONSTITUTION:A layer (layer A) of a thermoplastic resin A containing particles is laminated on at least one surface of a layer (layer B) of a thermoplastic resin B. The ratio t/d of the thickness t of the layer A to the average particle size d of the particles contained in the thermoplastic resin A is 0.1-5; the number of peaks which exist on the surface of the layer A and have diameters from 0.7mum to 2.6mum is 100-10,000/mm; the ratio L/S of the number L of peaks which have diameters from 0.7mum to 2.6mum to the number S of peaks which have diameters of 0.2mum or more and less than 0.7mum is 1/50-1/10,000. In this way, when the film is wound up into a roll in film making, slitting, or other processing steps, the generation of winding wrinkles and end face dislocation is prevented so that the transfer speed of the film in each processing step can be increased.