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公开(公告)号：JP2002331575A
公开(公告)日：2002-11-19
申请号：JP2001137615
申请日：2001-05-08
Applicant: TORAY INDUSTRIES
Inventor： TERAMOTO MASAYUKI , KUNO MASAMI , TAKAGI YORIYUKI
Abstract: PROBLEM TO BE SOLVED: To provide each sort of polyester film for releasing suitable for a green sheet for a ceramic capacitor which endures processing without any problem of a wrinkle, breakage or the like in processing even when the film is made thinner than a usual article so as to reduce an environmental load and which shows excellence in respect to the nonuniformity in thickness connecting to defects of coating and processing and causes little precipitation of a surface oligomer, and suitable for protection of a liquid crystal polarizer, a photoresist and further for a multilayer base manufactured by coating with an epoxy resin and others. SOLUTION: A biaxial drawing polyester film for releasing has a birefringent index Δn satisfying Δn=nMD-nTD and -0.08
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公开(公告)号：JPH07266416A
公开(公告)日：1995-10-17
申请号：JP6503094
申请日：1994-04-01
Applicant: TORAY INDUSTRIES
Inventor： TERAMOTO MASAYUKI , KUNO MASAMI , OTA TSUYOSHI
Abstract: PURPOSE:To prevent occurrence of a curl attendant on a habit of winding to improve a flatness by setting a difference of a birefringence ratio between the top and rear surface of a film to a specific value. CONSTITUTION:A difference of a birefringence ratio (DELTAn) between the top and rear surface of a film is set to be not less than 3X10 . By winding the film with the surface of a small birefringence ratio inside, the film can be flat without a habit of winding in the longitudinal direction of the film at the time of secondary processing even when the film is supplied in a roll form as a primary product. In the method of producing the film, a difference of a birefringence ratio can be obtained by forcibly giving a temperature difference to the top and rear surfaces in any of an extrusion process, a casting and longitudinally orienting process, and a thermally fixing process, on the contrary by giving a cooling speed difference to the top and rear surface of the film, or alternatively by laminating polymers of different kinds by a co-extrusion system and using a difference of a crystallization speed between the both. For example, a material is extruded in a sheet form, one surface is cooled and set at a cooling speed of 10 deg.C/sec or more on a 10-40 deg.C casting drum, the other surface opposite to the casting drum is cooled by air, and the film is oriented.
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公开(公告)号：JPH11342536A
公开(公告)日：1999-12-14
申请号：JP9477699
申请日：1999-04-01
Applicant: TORAY INDUSTRIES
Inventor： SUMIYA TAKASHI , KINOSHITA SHUICHI , KUNO MASAMI
Abstract: PROBLEM TO BE SOLVED: To provide the image forming polyester film capable of forming an image excellent in image stability and free from irregularity. SOLUTION: A polyester film is stretched in biaxial directions and characterized by that transparency is 8-0.1% (in terms of a thickness of 100 μm), average surface roughness is 0.3-0.001 μm, the difference between the max. and min. values of a heat shrinkage factor in an in-plane direction at 120 deg.C within 30 sec is 0.09% or less and a humidity expansion coefficient is 3-30 cm/cm/% RH. Further, single elongation is set to 30 mm or less.
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公开(公告)号：JPH09288814A
公开(公告)日：1997-11-04
申请号：JP9814396
申请日：1996-04-19
Applicant: TORAY INDUSTRIES
Inventor： KUROME TAIICHI , KUNO MASAMI , OTAKI TOSHIHIRO
Abstract: PROBLEM TO BE SOLVED: To prevent generation of surface defects in a film forming process and working processes such as a magnetic layer applying by giving specific surface roughness and friction coefficient between films with each other to the film for a high density floppy disk having thin film thickness and smooth surface. SOLUTION: The film is made of a polyester resin which has 0.05 to 1.0wt.% particles of >=0.05 to =1.5μm average grain size and, further, the film has 25 to 70μm thickness, 4 to 12nm center line average surface roughness (Ra) on both film surfaces, 0.55 to 0.8 static friction coefficient and 0.35 to 0.53 dynamic friction coefficient between the films.
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公开(公告)号：JP2002079575A
公开(公告)日：2002-03-19
申请号：JP2001158837
申请日：2001-05-28
Applicant: TORAY INDUSTRIES
Inventor： TAKAGI YORIYUKI , KUNO MASAMI
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film for mold release capable of being uniformly processed while enhancing the surface smoothness of the film and satisfying running properties, taking-up properties and stable releasability in a well-balanced state. SOLUTION: In at least the single surface of the biaxially oriented polyester film for mold release, the number of projections with a height of 1 μm or more per 10 m2 is
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Patent Agency Ranking
公开(公告)号：JPH11316934A
公开(公告)日：1999-11-16
申请号：JP13611598
申请日：1998-04-30
Applicant: TORAY INDUSTRIES
Inventor： KATO HIDEKAZU , KUNO MASAMI
IPC: C08J5/18 , B29C55/12 , B29K67/00 , B29L9/00 , B32B27/36 , C08K7/16 , C08L67/02 , C09D5/00 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PROBLEM TO BE SOLVED: To provide a polyester film for a magnetic recording disk which has little surface defects even if the film has low rigidity and a smooth surface and further, in which the amt. of oligomers in the film is controlled by imparting a specific friction coefft. to the film. SOLUTION: This polyester film for a magnetic recording disk consists of a polyester resin containing 0.2 to 0.4 wt.% particles having >=0.04 μm and =0.5 μm average particle size. The film has 25 to 70 μm thickness, 4 to 7 nm center line average surface roughness of the film surface (Ra) and oligomer content.
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公开(公告)号：JPH11283243A
公开(公告)日：1999-10-15
申请号：JP10200598
申请日：1998-03-30
Applicant: TORAY INDUSTRIES
Inventor： KATO HIDEKAZU , KUNO MASAMI
Abstract: PROBLEM TO BE SOLVED: To apply to the disk, in which capacity is made larger and performance is made superior, by obtaining the film in which size precision is curling and isotropy are made superior, the size stability is also made superior, by making the difference between the refractive indexes of the film front and the back to be equal to or less than a specific value. SOLUTION: The difference between the refractive indexes of the front and the back of the film is set to
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8.发明专利
公开(公告)号：JP2001084564A
公开(公告)日：2001-03-30
申请号：JP25836699
申请日：1999-09-13
Applicant: TORAY INDUSTRIES
Inventor： MORI MASAMI , KUNO MASAMI , KUROME TAIICHI
Abstract: PROBLEM TO BE SOLVED: To provide a polyester film excellent to prevent output characteristic from being deteriorated due to unstable traveling of a magnetic head owing to uneven contact with a disk and suitable for a high capacity and high efficiency disk by arranging a specified number of large projections each having a height and diameter at the bottom of specified value ranges on one surface of the biaxially oriented polyester film. SOLUTION: It is important as the polyester film for a magnetic recording disk to realize stable traveling of the head and secure excellent stable output characteristic and desirable to control the modulation showing the output stability to be 10% or lower. For this purpose, such large projections are arranged on at least one surface of the biaxially oriented polyester film, as have a height of >=100 nm and =110 nm and =5 μm and =10 μm and =4 pieces/cm2 and =5 pieces/cm2 and
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公开(公告)号：JP2000020944A
公开(公告)日：2000-01-21
申请号：JP18631398
申请日：1998-07-01
Applicant: TORAY INDUSTRIES
Inventor： KATO HIDEKAZU , KUNO MASAMI
Abstract: PROBLEM TO BE SOLVED: To avoid shifts in tracking and deterioration of a planarity during long-term use at high temp. and high humidity by maintaining the rate of dimensional change and intrasurface anisotropy the level lower than a prescribed level at high temp. and high humidity. SOLUTION: This polyester film has 0.1% or lower rate of dimensional change and 0.05% or lower as intrasurface anisotropy at 80 deg.C in 30 min and 0.2% or lower rate of dimensional change and 0.1% or lower intrasurface anisotropy at 80 deg.C and at 80% RH for 30 min. A polyester resin forming the polyester film is a linear polyester using an arom. dicarboxylic acid as the principal acid component and an aliphatic glycol as the principal glycol component. The arom. dicarboxylic acid is, e.g. terephthalic acid, naphthalenedicarboxylic acid or isophthalic acid. The aliphatic glycol is, e.g. a 2-10C polyethylene glycol such as ethylene glycol or diethylene glycol.
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公开(公告)号：JPH1145426A
公开(公告)日：1999-02-16
申请号：JP21575597
申请日：1997-07-25
Applicant: TORAY INDUSTRIES
Inventor： KUROME TAIICHI , KUNO MASAMI , OTAKI TOSHIHIRO
Abstract: PROBLEM TO BE SOLVED: To provide a floppy disk which has a high reliability as a high capacity disk without generating the deviation in tracking or deterioration of flatness even in its long term use under high temp. and high humidity conditions. SOLUTION: The dimensional change ratio and intra-plane anisotropy of a biaxial orientation polyester film at 80 deg.C for 30 minutes are controlled to be
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