-
公开(公告)号：JPH071577A
公开(公告)日：1995-01-06
申请号：JP10326694
申请日：1994-04-19
Applicant: TORAY INDUSTRIES
Inventor： NAKAJIMA SHOJI , ABE KOICHI , OKAMOTO KATSUYA
Abstract: PURPOSE:To obtain a desired surface form capable of suppressing the formation of voids, capable of densely forming hardly cut surface projections and enhanced in surface running durability. 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 average height of projections is 0.01-0.8mum.
-
公开(公告)号：JPH06320694A
公开(公告)日：1994-11-22
申请号：JP13402393
申请日：1993-05-11
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NAKAJIMA SHOJI , OKAMOTO KATSUYA
Abstract: PURPOSE:To obtain a laminated film adapted to be used for a magnetic tape in which polyester A layers laminated on both side surfaces of a polyester B layer can be formed of the same polyester A and simultaneously front and rear surfaces can be formed of surface states having desired cutting resistances, image quality, etc. CONSTITUTION:A laminated film comprises A layers each containing polyester A as a main ingredient and laminated on both side surfaces of a B layer containing polyester B as a main ingredient, wherein A1 of surface roughness of the one A layer is 0.2-20nm and A2 of surface roughness of the other A layer is 5-50nm, and A1 is smaller than A2, and a method for manufacturing the same is provided.
-
公开(公告)号：JPH06320693A
公开(公告)日：1994-11-22
申请号：JP13402293
申请日：1993-05-11
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO KATSUYA , ABE KOICHI , NAKAJIMA SHOJI
Abstract: PURPOSE:To provide a film in which occurrence of a trouble upon generation of void can be suppressed and fine protrusions are formed densely and uniformly on a surface. CONSTITUTION:A laminated polyester film comprises an A layer containing polyester A as a main ingredient and laminated at least on one side surface of a B layer containing polyester B as a main ingredient, wherein surface protrusions due to fine crystal uniformly and regularly exist and a flat surface existing among the protrusions is small.
-
公开(公告)号：JPH06256542A
公开(公告)日：1994-09-13
申请号：JP1749794
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 , B29L9/00 , B32B27/36 , C08J5/18 , G11B5/73 , G11B5/733
Abstract: PURPOSE:To obtain the subject film useful for video tapes, etc., mainly comprising a thermoplastic resin and inert particles with 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., the average particle size of which in the film is 0.1-10 times the thickness of the film, contains 0.01-0.5wt.% inert particles and is 0.005-3mum thick. Here, it is preferable to laminate the objective film on a film surface of the thermoplastic resin not containing inert particles to make a biaxially oriented thermoplastic resin film. Further, the inert particles in the objective film preferably have 1.0-1.3 size ratio and
-
公开(公告)号：JPH05318581A
公开(公告)日：1993-12-03
申请号：JP15005192
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 , B32B7/02 , B32B27/20 , B32B27/36 , B32B33/00 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PURPOSE:To improve traveling properties and protrusion breaking strength, to improve adhesiveness with a magnetic layer and to reduce a decrease in picture quality 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 specifying crystallinity of the outermost layer. 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, the outermost layer of at least one side surface is set to lower crystallinity 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, adhesiveness with a magnetic layer at the time of using it as a magnetic medium is improved, and a decrease in picture quality is reduced.
-
Patent Agency Ranking
公开(公告)号：JPH05154907A
公开(公告)日：1993-06-22
申请号：JP34944591
申请日：1991-12-09
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO KATSUYA , ABE KOICHI , NAKAJIMA SHOJI
IPC: B29C55/12 , B29K105/16 , B29L9/00 , B32B3/30 , B32B7/02 , B32B27/08 , B32B27/20 , C08J5/18 , G11B5/733
Abstract: PURPOSE:To provide biaxially orientated thermoplastic resin film, by which the falling of particles off base film in the production process of magnetic recording medium is suppressed and consequently drop-out is reduced. CONSTITUTION:In the biaxially orientated thermoplastic resin film concerned, at least the ratio (sigma/h) of the standard deviation (sigma) of the heights of projections on one surface of the film to the average height (h) of the projections is 0.5 or less and, further, the ratio (h/d) of the average height (h) of the projections to the average diameter (d) of projections is 0.17 or less.
-
公开(公告)号：JPH0532213B2
公开(公告)日：1993-05-14
申请号：JP2251088
申请日：1988-02-01
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NAKAJIMA SHOJI , OKAZAKI IWAO
-
公开(公告)号：JPH04259533A
公开(公告)日：1992-09-16
申请号：JP4072091
申请日：1991-02-14
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , OKAZAKI IWAO , NAKAJIMA SHOJI
Abstract: PURPOSE:To provide a polyester film roll capable of being prevented from a stepping slip of edge generated heretofore at the time of transport. CONSTITUTION:In a film roll formed by rolling a biaxially oriented film wherein a layer of polyester A containing particles is laminated to the single surface of a layer of a polyester B so that the layer of polyester A is made inside, the ratio t/d of the thickness (t) of the layer A and the mean particle size (d) contained in the layer A is 0.1-2.5 and the ratio SRmax/SRa of the three- dimensional surface roughness parameter SRa of the layer A and the SRmax thereof is 20 or less.
-
公开(公告)号：JPH03224127A
公开(公告)日：1991-10-03
申请号：JP28666490
申请日：1990-10-23
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , OKAZAKI IWAO , NAKAJIMA SHOJI
Abstract: PURPOSE:To obtain the recording medium which is high in S/N and is less degraded in S/N by repetitive traveling by forming the ruggedness on the surface of a magnetic layer mainly of recesses. CONSTITUTION:The ruggedness on the surface of the magnetic layer of the magnetic recording medium provided with the coating type magnetic layer on at least one surface of a base material film consists mainly of the recesses. Namely, the ruggedness on the surface of the magnetic layer is required to consist mainly of the recesses. The degradation in the S/N is large and such is undesirable if the ruggedness consists mainly of projections. The surface form of the magnetic layer is easily obtainable; in addition, the higher S/N is obtd. and the degradation in the S/N is additionally lessened and, therefore, such is preferable, if the thickness of the magnetic layer is kept within a 0.5 to 5mum range. The wear resistance is improved while the generation of noises is suppressed to a low level.
-
公开(公告)号：JPH03209621A
公开(公告)日：1991-09-12
申请号：JP399790
申请日：1990-01-11
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , OKAZAKI IWAO , NAKAJIMA SHOJI
Abstract: PURPOSE:To satisfy both characteristics of the durability and tracking resistance characteristics by using a thermoplastic resin contg. particles and specifying the relation between the size of the particles and the thickness of the films, the contents, the thickness of the films, and coefft. of moisture expansion, etc. CONSTITUTION:This video floppy consists of the biaxially oriented thermoplastic resin film and the magnetic layer. The biaxially oriented thermoplastic resin film includes a film layer A essentially consisting of the thermoplastic resin A and the particles and having 0.005 to 3mum thickness. The average diameter of the particles incorporated into the film layer A is 0.2 to 10 times the thickness of the film layer A. The durability and tracking resistance characteristic are inferior if this range is exceeded. The content of the particles is 0.5 to 30wt.%. The durability and drop-out characteristic are inferior if this range is exceeded. Further, the coefft. of moisture expansion in the arbitrary direction within the plane of the biaxially oriented thermoplastic resin film is specified to a /% RH range. The tracking resistance is inferior if this range is exceeded.
-
-
-
-
-
-
-
-
-
Search Results
201
records
(took 0.025 seconds)
