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公开(公告)号：JPH0919991A
公开(公告)日：1997-01-21
申请号：JP17342395
申请日：1995-07-10
Applicant: TORAY INDUSTRIES
Inventor： AOKI SEIZO , DEGUCHI YUKICHI , UEDA TAKASHI
Abstract: PROBLEM TO BE SOLVED: To obtain a polyester film for a capacitor by a method in which a film having a long wet heat resisting life and a reduced dielectric loss is obtained by making surface carboxylic acid concentration a specified value or more and the glass transition temperature of a coat layer a specific value or more as compared with a conventional film, and as a result, the life under high temperature and high humidity is improved remarkably, and the capacitor is prevented from breaking by the increase in the dielectric loss. SOLUTION: In a film in which a coat is formed at least on one side of a polyester film, the surface carboxylic acid concentration of the coat is 0.003 or more, and the glass transition temperature of the coat exceeds 80 deg.C.
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公开(公告)号：JPH08222477A
公开(公告)日：1996-08-30
申请号：JP2182095
申请日：1995-02-09
Applicant: TORAY INDUSTRIES
Inventor： UEDA TOMOAKI , AOKI SEIZO , UEDA TAKASHI
Abstract: PURPOSE: To enable a polyethylene naphthalate film used for a capacitor to be enhanced in dielectric breakdown strength and set stable in dielectric characteristics by a method wherein the film is set higher than a prescribed value in fracture strength in both a longitudinal and a lateral direction and to be in a prescribed range of thermal shrinkage rate at a prescribed temperature for a prescribed time along its lengthwise direction. CONSTITUTION: A film is above 25kg/mm in fracture strength in both a longitudinal and a lateral direction and set 3 to 15% in lengthwise thermal shrinkage rate at a temperature of 200 deg.C for 10 minutes. The polyethylene naphthalate film is mainly composed of two units of ethylene and six units of naphthalate. If the film is below 25kg/mm in fracture strength in both a longitudinal and a lateral direction, it deteriorates in dielectric breakdown strength. If the film is less than 3% in lengthwise thermal shrinkage rate at a temperature of 200 deg.C for 10 minutes, it deteriorates in dielectric breakdown strength when it is rolled up or laminated into a capacitor. If the film is more than 15% in lengthwise thermal shrinkage rate at a temperature of 200 deg.C for 10 minutes, it deteriorates also in dielectric breakdown strength the same as above. It is preferable that the film is set 4 to 10% in thermal shrinkage rate.
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公开(公告)号：JPH0858048A
公开(公告)日：1996-03-05
申请号：JP14868295
申请日：1995-06-15
Applicant: TORAY INDUSTRIES
Inventor： AOKI SEIZO , UEDA TAKASHI , UEDA TOMOAKI
Abstract: PURPOSE: To improve the moisture/heat resistance of capacitor, metal deposition barrier property, and adhesions of various inks by setting a change of torque, at the time of re-melt of a polyester film having a coat on its one face, to a specified times as high as an initial torque. CONSTITUTION: A change of torque due to a melting viscosity at the time of re-melt of a polyester film should be within a range of 0.5-3 times as high as an initial torque. Preferably, it should be 0.7-2 times, more preferably, within a range of 0.8-1.7 times in view of recoverability (coloring, foaming, degradation of melting point, production of foreign matter due to gelling, etc.). When it is under 0.5 times, a melting viscosity at the time of recovery lowers extremely and uniform casting property can not be obtained, besides, the film is foamed, so that sheet molding becomes difficult. In addition, there are problems that sublimation is intense, attaching matters to a cast drum increase, and defective surface and break of the film occur. When the change of torque exceeds three times, gels produce so as to bring about defective inside and surface of the film. Also, when the gelling is heavy, foaming or breaking in stretching occurs.
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公开(公告)号：JPH11293014A
公开(公告)日：1999-10-26
申请号：JP10290298
申请日：1998-04-14
Applicant: TORAY INDUSTRIES
Inventor： UEDA TAKASHI , NAGAI ITSUO
Abstract: PROBLEM TO BE SOLVED: To provide the subject film capable of reducing both leak current and power loss and having improved set stability, easiness of set-installation confirmation and mold processability, by molding a poly(ethylene 2,6-naphthalate) into a film form and biaxially orienting it. SOLUTION: A poly(ethylene 2,6-naphthalate) having an intrinsic viscosity of 0.4-1 dl/g, pref. 0.5-0.9 dl/g, more pref. 0.55-0.85 dl/g, is blended with an incompatible additive of a polyolefin with a m.p. of 200-300 deg.C and 0.01-5 wt.%, pref. 0.004-1 wt.% of solid microparticles with an average particle dia. of 0.1-10 μm, molded into a film form, thereafter heated to or above the glass transition temp. of the polyester and biaxially oriented, then heat-treated at 200-250 deg.C to give an electrical insulating polyester film having a cushion factor of 5-40%, a cleavage strength of 300 g/15 mm or more, and an apparent density of 0.8-1.3 g/cm .
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公开(公告)号：JPH11162779A
公开(公告)日：1999-06-18
申请号：JP32583097
申请日：1997-11-27
Applicant: TORAY INDUSTRIES
Inventor： UEDA TAKASHI , TANAKA SHIGERU , NAGAI ITSUO
Abstract: PROBLEM TO BE SOLVED: To provide a polypropylene film for supplying a capacitor with high maintenance, by reducing electrical insulation defect, making dielectric breakdown strength excellent, and reducing the change of an electrostatic capacity with lapse of time. SOLUTION: A two-axial orientation polypropylene film having at least one resin layer in which more than one kind of resin selected from oil resin which does not substantially include any double bond or polar group, and terpene resin which does not substantially include any double bond or polar group which is 5-50 by weight is mixed with polypropylene resin which is 100 by weight, is provided. The center line mean surface roughness of at least one face of the film is more than 0.03 μm and 0.5 μm or less.
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Patent Agency Ranking
公开(公告)号：JPH10119127A
公开(公告)日：1998-05-12
申请号：JP27507496
申请日：1996-10-17
Applicant: TORAY INDUSTRIES
Inventor： NAGAI ITSUO , UEDA TAKASHI , TANAKA SHIGERU
Abstract: PROBLEM TO BE SOLVED: To enhance heat resistance and vapor deposition processability by specifying the isotacticity and isotactic pentad ratio of a biaxially oriented polypropylene film and also specifying the dielectric breakdown voltage per the sum of the heat shrinkage factors of the film in the machine and width directions thereof and the thickness thereof at specific temp. and the thickness of the film. SOLUTION: The isotacticity of a biaxially oriented polypropylene film is 98.5-99.5%. Herein, the isotacticity is defined by the ratio of the wt. of an insoluble component to the wt. of the film before extraction when the film is extracted with boiling n-heptane. The stereoregularity of the biaxially oriented polypropylene film is evaluated by the pentad ratio due to the absorption peak of a methyl group measured by 13C-NMR and the isotactic pentad ratio of the biaxially oriented polypropylene film exceeds 99%. Further, the sum of the heat shrinkage factors in the machine and width directions of the film at a time of heating at 120 deg.C for 15min is 1.5-3.5% and the DC dielectric breakdown strength of the film at 105 deg.C is 580-(200/d ) (V/μm) and the thickness of the film is 2-20μm.
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47.发明专利
公开(公告)号：JPH10119126A
公开(公告)日：1998-05-12
申请号：JP27507396
申请日：1996-10-17
Applicant: TORAY INDUSTRIES
Inventor： NAGAI ITSUO , UEDA TAKASHI , TANAKA SHIGERU
Abstract: PROBLEM TO BE SOLVED: To enhance heat resistance and vapor deposition processability by specifying the isotacticity and isotactic pentad ratio of a biaxially oreiented polypropylene film and also specifying the wet tension of at least one surface of the film. SOLUTION: The isotacticity of a biaxially oriented polypropylene film is 98-99.5%. Herein, the isotacticity is defined by the ratio of the wt. of an insoluble component to the wt. of the film before extraction when the film is extracted with boiling n-heptane. The stereoregularity of the biaxially oriented polypropylene film is evaluated by the pentad ratio due to the absorption peak of a methyl group measured by 13C-NMR and the isotactic pentad ratio of the biaxially oriented polypropylene film exceeds 99%. In this biaxially oriented polypropylene film, the wet tension of at least one surface thereof is 35-50mN/m.
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公开(公告)号：JPH08106815A
公开(公告)日：1996-04-23
申请号：JP24269594
申请日：1994-10-06
Applicant: TORAY INDUSTRIES
Inventor： UEDA TOMOAKI , AOKI SEIZO , UEDA TAKASHI
IPC: B29C55/12 , B29K67/00 , C08G63/189 , H01B3/30
Abstract: PURPOSE: To improve processing suitability and heat resistance by using a biaxial orientation polyethylene-2,6-naphthalate film having predetermined crystallinity and chloroform extract. CONSTITUTION: After polyethylene naphthalate produced by fused polymerization or solid phase polymerization is dried, the same is extruded to be sheet-like at a predetermined temperature from an extractor so as to form an amorphous sheet. Thereafter, drawing treatment is conducted so as to form a biaxial orientation film. Crystallinity is controlled by heat treatment so as to be 40% or more, and extract amount is controlled so as to be 0.5%or less after 48 hours extraction with chloroform. By using a biaxial orientation polyethylene-2,6- naphthalate film having 40% or more of crystallinity and 0.5% or less of chloroform extract after 48 hours extraction with chloroform, it is possible to obtain excellent processing suitability and heat resistance, and to improve reliability.
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公开(公告)号：JP2002361736A
公开(公告)日：2002-12-18
申请号：JP2001176872
申请日：2001-06-12
Applicant: TORAY INDUSTRIES
Inventor： YOKOTA SUNAO , UEDA TAKASHI , SUDO MASAAKI
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film for a hard coat of high flatness after hard coat-processing. SOLUTION: The coefficient of thermal expansion in the widthwise, direction at 50-100 deg.C in relation to 30 deg.C of the biaxially oriented polyester film is -0.5-0.5%, and the film satisfies formula 1: 10 μm
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公开(公告)号：JP2000318294A
公开(公告)日：2000-11-21
申请号：JP12552199
申请日：1999-05-06
Applicant: TORAY INDUSTRIES
Inventor： KINOSHITA SHUICHI , UEDA TAKASHI , ONISHI MASAYA
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film suitable for an image receiving sheet of a high performance ink jet printer, and an ink jet image receiving sheet using it. SOLUTION: A resin layer having a density of 0.6 to 1.2 g/cm, whiteness of 100% or above, a glossiness of 50% or above, and containing at least one type of a polyester resin, a copolymer polyester resin, acrylic resin, a polyurethane resin, and a sulfonated polystyrene is provided on at least one side surface. An ink receiving layer is provided on at least one side surface of the biaxially oriented polyester film.
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