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公开(公告)号：JP2000030973A
公开(公告)日：2000-01-28
申请号：JP20163398
申请日：1998-07-16
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATOSHI , KUBOYAMA HIROSHI , HATAYAMA AKIRA
Abstract: PROBLEM TO BE SOLVED: To provide the polyester film for a capacitor which suitably obtains excellent dielectric strength and insulation resistance even under severe capacitor machining condition. SOLUTION: This polyester film for a capacitor is a biaxially oriented film consisting principally of polyethylene terephthalate, the number of surface projections of 2000 to 500 nm measured by the three-dimensional surface roughness meter is 200 to 2000/nm2, and the thermal elongation quantity Z(%) of the film at 90 to 140 deg.C C satisfies 3.9×10-4.(t-40)2>=Z>=1.2×10-8.(t-40)4, where (t) is the measured temperature ( deg.C).
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公开(公告)号：JP2530747B2
公开(公告)日：1996-09-04
申请号：JP18014090
申请日：1990-07-06
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATOSHI , ABE KOICHI , FUKUYAMA TAKEO
IPC: B32B27/36
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公开(公告)号：JP2513727B2
公开(公告)日：1996-07-03
申请号：JP25546887
申请日：1987-10-08
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO SATOSHI , MINAMIZAWA HIDEHITO
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公开(公告)号：JPH06279599A
公开(公告)日：1994-10-04
申请号：JP27304293
申请日：1993-10-04
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO SATOSHI , MINAMIZAWA HIDEHITO
Abstract: PURPOSE:To obtain a film excellent in scratch resistance which can withstand to severe service conditions as have recently been encountered. CONSTITUTION:A biaxially oriented polyester film contains 2 kinds of particles A and B, the contents of which in the film are 0.1 to 2wt.% and higher than 0.4 to 10wt.%, respectively. The particles A are one kind of particles selected from among alpha-alumina, gamma-alumina, delta-alumina, zirconia, titanium nitride and org. polymers and having an average particle size of 5 to 400nm. The particles B are one kind of particles selected from among silica, calcium carbonate, alumina, rutile titanium oxide and org. polymers and having an average particle size of 400 to 1,500nm.
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公开(公告)号：JPH04117430A
公开(公告)日：1992-04-17
申请号：JP23830790
申请日：1990-09-07
Applicant: TORAY INDUSTRIES
Inventor： NISHINO SATOSHI , ABE KOICHI , FUKUYAMA TAKEO
Abstract: PURPOSE:To obtain a polyester film excellent in chipping resistance at high speed, dubbing resistance, etc., by adding thereto a specified amount of specified copolymer particles. CONSTITUTION:This film contains 0.001-10wt.% crosslinked poly(ethylvinylbenzene/divinylbenzene) copolymer particles.
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Patent Agency Ranking
公开(公告)号：JPH0462137A
公开(公告)日：1992-02-27
申请号：JP16759390
申请日：1990-06-26
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , NISHINO SATOSHI , ABE KOICHI
Abstract: PURPOSE:To obtain a biaxially stretched polyester film satisfying the compatibility of the damage of a magnetic surface and the frictional characteristic with a resin guide pin by setting the sphericity, mean particle size, content and thickness orientation index of calcium carbonate particles in a film to specific ranges. CONSTITUTION:A biaxially oriented polyester film contains 0.002-10.0wt.% of spherical calcium carbonate particles having sphericity in the film of 1.5 or less, a mean particle size of 0.010-5.00mum and a thickness orientation index of 1.20 or less. When the sphericity is larger than the above-mentioned range, the frictional characteristic with a resin guide pin becomes inferior and, when the mean particle size is smaller than the above-mentioned range, the frictional characteristic with the resin guide pin becomes inferior and, when the mean particle size is larger than said range, a magnetic surface becomes inferior. When the content is larger than the above-mentioned range, the frictional characteristic with the resin guide pin becomes inferior and, when the content is larger than said range, the magnetic surface becomes inferior. Further, when the thickness orientation index exceeds 1.20, no effect is obtained.
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公开(公告)号：JPH03208644A
公开(公告)日：1991-09-11
申请号：JP521890
申请日：1990-01-12
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , NISHINO SATOSHI , ABE KOICHI
Abstract: PURPOSE:To obtain an excellent anti-scratching property and frictional characteristic by laminating thermoplastic resin containing particles at least on one surface, and permitting the relation between the particle size and the lamination thickness, and the radius of curvature in projection tips to be in a specific range. CONSTITUTION:The film is formed such that thermoplastic resin A containing particles is laminated at least on one surface, and they are biaxially oriented thereafter. In this case, the particle size is required to be in the range of 0.1-10 times of the laminate thickness in the average particle diameter in the film. And, when the average projection height of the film laminate surface is made in the range of 10-1,000 nm, it is preferable, since the anti-scratching property and frictional characteristic become good. Furthermore, regarding the surface projections being 10 nm or higher in the height of the film laminate surface, it is required that the number of the projections being ten times or more of the average particle diameter of the particles containing the radius of curvature betain the projection tips is 15% or less in the whole number of the surface projections being 10 nm in height.
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公开(公告)号：JPH02214735A
公开(公告)日：1990-08-27
申请号：JP3512189
申请日：1989-02-16
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO SATOSHI , FUKUYAMA TAKEO
IPC: B29C55/12 , B29K67/00 , B29L7/00 , C08G63/18 , C08G63/78 , C08J5/18 , C08K3/22 , C08K7/00 , C08L67/00 , C08L67/02
Abstract: PURPOSE:To provide the subject film containing specific amounts of two specific kinds of particles, having excellent scratch resistance and abrasion resistance and suitable as a base film for magnetic tape, packaging film and film for various industrial materials. CONSTITUTION:The objective film contains two kinds of particles A and B. The particle A is rutile-type titanium dioxide particle having an average particle diameter of 10-400nm and its content in the film is 0.2-2wt.%. The particle B is alumina or organic polymer particle having an average particle diameter of 400-1,500nm and its content in the film is 0.01-0.2wt.%. The surface resistivity of the film is preferably OMEGA.cm. The standard deviation of the height distribution of surface protrusion is preferably
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公开(公告)号：JPH0214126A
公开(公告)日：1990-01-18
申请号：JP16568288
申请日：1988-07-01
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NISHINO SATOSHI , TOKUOKA YUMIKO
Abstract: PURPOSE:To enhance resistance to being shaved on the surface and the appearance of winding by laminating given specific polyester on at least one surface of thermoplastic resin, providing given projections on the surface of said polyester layer and making the sum of Young's modulus in the longitudinal direction and that of width direction in the given range. CONSTITUTION:Polyester composed of ethylene naphthalate or ethylene alpha,beta-bis(2- chlorophenoxy)ethane-4,4'-dicarboxylate of 0.01-2.5mum thickness as main components is laminated at least on one surface of thermoplastic resin. 80% or more of projections out of the all projections of 20mum or more height on the surface of said polyester layer satisfies the formula (1) regarding the relation between the projection height (h) (unit mum) and projection end curvature radius beta(unit mum). The sum of Young's modulus in the longitudinal and width directions is 700-1,700kg/mm , and the difference between thermoplastic resin and polyester crystallization parameter DELTATcg is 10 deg.C or over. When the melting viscosity of polyester is higher than thermoplastic resi, preferably higher by 2000 poise, the appearance of winding is still better.
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公开(公告)号：JPH0211640A
公开(公告)日：1990-01-16
申请号：JP16205088
申请日：1988-06-29
Applicant: TORAY INDUSTRIES
Inventor： MINAMIZAWA HIDEHITO , NISHINO SATOSHI , ABE KOICHI
Abstract: PURPOSE:To obtain the title film improved in the prevention of dusting during slitting and abrasion resistance by adding inert organic polymer particles of a specified particles shape and a specified particle diameter to a biaxially oriented polyester film. CONSTITUTION:The title biaxially oriented polyester film contains 0.01-3wt.% inorganic polymer particles of a sphericity (major diameter/minor diameter) of 1.2-3.0 and a mean particle diameter of 0.1-3mum. As the inert organic polymer particles suitable to have a sphericity of 1.2-3.0, crosslinked polymer particles, especially, crosslinked spherical styrene/divinylbenzene copolymer particles are desirable. It is particularly effective in imparting better clutch resistance to the film that the heat resistance temperature of the inert organic polymer particles is at least 380 deg.C, desirably, at least 390 deg.C. Further, it is effective in improving the prevention of dusting that the crystallization acceleration coefficient of the inert organic polymer particles lies in the range of -10-+10 deg.C.
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