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公开(公告)号：DE69812562T2
公开(公告)日：2003-11-27
申请号：DE69812562
申请日：1998-12-17
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , HIGASHIOJI TAKUJI , TSUNASHIMA KENJI
Abstract: The object of the present invention is to provide a method for producing a polyester film excellent in rigidity, toughness, dimensional stability, electric properties, etc. and less in thickness fluctuation and surface defects, hence very suitable as a film for various industrial materials such as magnetic recording media, capacitors, heat transfer ribbons and thermal mimeographic stencil paper. The first method of the present invention is a method for producing a polyester film, in which a film made of a resin mainly composed of a polyester is simultaneously biaxially stretched by a simultaneously biaxially stretching tenter oven, comprising the step of effecting small-ratio stretching at an area stretching ratio of 1.0005 to 3.0 times three times or more, to achieve a total area stretching ratio of 25 to 150 times, and the second method of the present invention is a method for producing a polyester film, in which a film made of a resin mainly composed of a polyester is stretched using a simultaneously biaxially stretching tenter oven, comprising the step of effecting a series of operation consisting of stretching and subsequent relaxation twice to less than 10000 times, to achieve a total area stretching ratio of 25 to 150 times.
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公开(公告)号：CA2282171C
公开(公告)日：2008-02-05
申请号：CA2282171
申请日：1999-09-10
Applicant: TORAY INDUSTRIES
Inventor： HOSOKAWA HIROFUMI , TSUNEKAWA TETSUYA , HIGASHIOJI TAKUJI
IPC: C08J5/18 , B29C55/12 , B41M5/41 , B41N1/24 , C08L67/02 , C08L79/08 , G11B5/70 , G11B5/73 , H01G4/018
Abstract: Disclosed is a biaxially oriented film made of (A) a polyester mainly composed of ethylene terephthalate and (B) a polyether imide and having a single glass transition temperature, a refractive index of 1.60 to 1.80 at least in either a machine direction or a transverse direction. The biaxially oriented film is excellent in thermal dimensional stability, clarity and productivity, and is suitable for use in magnetic recording tape, magnetic recording card, printing plate, ribbon, capacitor, heat-sensitive mimeograph stencil or the like.
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公开(公告)号：DE69812562D1
公开(公告)日：2003-04-30
申请号：DE69812562
申请日：1998-12-17
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , HIGASHIOJI TAKUJI , TSUNASHIMA KENJI
Abstract: The object of the present invention is to provide a method for producing a polyester film excellent in rigidity, toughness, dimensional stability, electric properties, etc. and less in thickness fluctuation and surface defects, hence very suitable as a film for various industrial materials such as magnetic recording media, capacitors, heat transfer ribbons and thermal mimeographic stencil paper. The first method of the present invention is a method for producing a polyester film, in which a film made of a resin mainly composed of a polyester is simultaneously biaxially stretched by a simultaneously biaxially stretching tenter oven, comprising the step of effecting small-ratio stretching at an area stretching ratio of 1.0005 to 3.0 times three times or more, to achieve a total area stretching ratio of 25 to 150 times, and the second method of the present invention is a method for producing a polyester film, in which a film made of a resin mainly composed of a polyester is stretched using a simultaneously biaxially stretching tenter oven, comprising the step of effecting a series of operation consisting of stretching and subsequent relaxation twice to less than 10000 times, to achieve a total area stretching ratio of 25 to 150 times.
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公开(公告)号：DE69622512T2
公开(公告)日：2002-11-07
申请号：DE69622512
申请日：1996-04-30
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , TSUNEKAWA TETSUYA , KOTOURA MASAAKI
IPC: D01F6/62 , B29C47/86 , B29C55/02 , B29K67/00 , B29L7/00 , C08J5/18 , C08K5/00 , C08L67/00 , C08L67/02 , C08L67/04 , D01F6/92 , G11B5/73 , H01B3/42
Abstract: A novel polyester film is disclosed, comprising a liquid crystal polyester, a non-liquid crystal polyester and a fiberizer capable of substantially fiberizing said liquid crystal polyester. A process for the preparation of such a polyester film is also disclosed. Such a polyester film shows drastic improvements in various physical properties and other properties over the prior art polyester films. The polyester film according to the present invention exhibits a high modulus of elasticity, a high toughness, a small content of oligomer, thermal decomposition products and gelation products and excellent electrical properties and thus can be used as a base film for electrical insulating material, capacitor, magnetic recording medium, OA, FA, etc.
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公开(公告)号：ID23276A
公开(公告)日：2000-04-05
申请号：ID990858
申请日：1999-09-10
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , HOSOKAWA HIROFUMI , HIGASHIOJI TAKUJI
Abstract: A biaxially oriented polyester film, comprising a polyester (A) at least mainly composed of ethylene terephthalate and a polyether imide (B), having a single glass transition temperature, and having a refractive index of 1.60 to 1.80 at least in either the machine direction or the transverse direction, has excellent thermal dimensional stability, clarity and is easy to produce. It can be prepared by melt-extruding a polyester (A) at least mainly composed of ethylene terephthalate and polyether imide (B), to mold a resin sheet with a single glass transition temperature, and stretching the resin sheet at a ratio of 3.0 to 10 times in the machine direction and at a ratio of 3.0 to 10 times in the transverse direction.
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Patent Agency Ranking
公开(公告)号：ID21071A
公开(公告)日：1999-04-15
申请号：ID981362
申请日：1998-10-14
Applicant: TORAY INDUSTRIES
Inventor： ASAKURA MASAYOSHI , ETOU KENICHI , TSUNEKAWA TETSUYA
Abstract: Disclosed is a biaxially oriented polyester film that is 7.0 GPa or more in either the Young's modulus in the machine direction (YmMD) or in the transverse direction (YmTD), and in the range of 55 DEG or more and 85 DEG or less in the circumferential half-width of the diffraction line from the crystal plane in the direction of the polyester's backbone chain that is determined through crystal orientation analysis by wide angle X-ray diffractometry performed while rotating the polyester film around its normal. The film is high in rigidity in all directions within the film plane, high in tear resistance, high in dimensional stability, and resistant to deformation under load, and have very great industrial advantages as material for high-density magnetic recording media, with wide applicability as material for electrostatic capacitor, heat transfer ribbon, and base paper for thermosensitive stencil printing.
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公开(公告)号：CA2249766A1
公开(公告)日：1999-04-14
申请号：CA2249766
申请日：1998-10-07
Applicant: TORAY INDUSTRIES
Inventor： ASAKURA MASAYOSHI , ETOU KENICHI , TSUNEKAWA TETSUYA
Abstract: Disclosed is a biaxially oriented polyester film that is 7.0 GPa or more in either the Young's modulus in the machine direction (YmMD) or in the transverse direction (YmTD), and in the range of 55 .degree. or more and 85.degree. or less in the circumferential half-width of the diffraction line from the crystal plane in the direction of the polyester's backbone chain that is determined through crystal orientation analysis by wide angle X-ray diffractometry performed while rotating the polyester film around its normal. The film is high in rigidity in all directions within the film plane, high in tear resistance, high in dimensional stability, and resistant to deformation under load, and have very great industrial advantages as material for high-density magnetic recording media, with wide applicability as material for electrostatic capacitor, heat transfer ribbon, and base paper for thermosensitive stencil printing.
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公开(公告)号：ID19960A
公开(公告)日：1998-08-27
申请号：ID980260
申请日：1998-02-25
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , KOTOURA MASAAKI , TSUNASHIMA KENJI
Abstract: A polyester film comprises a non-liquid crystal polyester (A) and a copolyester (B) containing mesogen groups in the main chain to form a phase separated structure in the non-liquid crystal polyester (A), and the dispersed domains of the copolyester (B) having respective dimensions such as to satisfy the following formulae (1) and (2): where I, J and K are shape indicators expressing the average shape of the plurality of domains existing in the film: I is the average length of the dispersed domains of the copolyester (B) in the machine direction of the film; J, that in the transverse direction; and K, that in the normal direction: and S is a function for selecting the shorter value of the lengths I and J; if I > J, SÄI, JÜ means J, and if I
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公开(公告)号：DE68918866T2
公开(公告)日：1995-02-16
申请号：DE68918866
申请日：1989-06-27
Applicant: TORAY INDUSTRIES
Inventor： GOTOH TETSUYA , TSUNEKAWA TETSUYA , FUKUDA SEIJI , MATAKI HIROSHI , EGAWA KEIICHI
IPC: C07C205/00 , C07C205/35 , G02F1/03 , G02F1/35 , G02F1/361
Abstract: PCT No. PCT/JP89/00635 Sec. 371 Date Feb. 27, 1991 Sec. 102(e) Date Feb. 27, 1991 PCT Filed Jun. 27, 1989 PCT Pub. No. WO91/00543 PCT Pub. Date Jan. 10, 1991.The present invention relates to a high performance nonlinear optical device by utilizing an optical medium of large second order nonlinear optical effects, which has acceptable processability and stability. The second-order nonlinear optical device of the present invention comprises an optical element of a monoclinic crystal of 4-hydroxy-3-methoxy-4'-nitrostilbene represented by the formula (I): (I) said crystal belonging to space group P21, point group #4, said optical element having at least one substantially optically smooth surface.
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公开(公告)号：MY121414A
公开(公告)日：2006-01-28
申请号：MYPI9903913
申请日：1999-09-09
Applicant: TORAY INDUSTRIES
Inventor： TSUNEKAWA TETSUYA , HOSOKAWA HIROFUMI , HIGASHIOJI TAKUJI
Abstract: AN OBJECT OF THE PRESENT INVENTION IS TO PROVIDE A BIAXIALLY ORIENTED HIGH QUALITY POLYESTER FILM EXCELLENT IN THERMAL DIMENSIONAL STABILITY AND CLARITY AND ALSO EXCELLENT IN PRODUCTIVITY, AND ALSO TO PROVIDE A PRODUCTION PROCESS THEREOF. ANOTHER OBJECT IS TO PROVIDE A BIAXIALLY ORIENTED POLYESTER FILM GREATLY IMPROVED IN THE PRACTICAL PROPERTIES RESPECTED IN VARIOUS APPLICATIONS OF THE POLYESTER FILM, SUCH AS THE RECORDING TRACK SHIFT IN MAGNETIC RECORDING TAPE APPLICATION, CURLING IN MAGNETIC RECORDING CARD APPLICATION, DIMENSIONAL CHANGE DURING PROCESS IN PRINTING PLATE APPLICATION, PRINTING SHIFT IN RIBBON APPLICATION, THERMOSTABILITY IN CAPACITOR APPLICATION, AND PERFORATION SENSITIVITY AND LOW TEMPERATURE CURLING IN HEAT-SENSITIVE MIMEOGRAPH STENCIL APPLICATION. THE OBJECTS OF THE PRESENT INVENTION CAN BE ACHIEVED BY A BIAXIALLY ORIENTED POLYESTER FILM, COMPRISING A POLYESTER (A) MAINLY COMPOSED OF ETHYLENE TEREPHTHALATE AND A POLYETHER IMIDE (B), HAVING A SINGLE GLASS TRANSITION TEMPERATURE, AND HAVING A REFRACTIVE INDEX OF 1.60 TO 1.80 AT LEAST IN EITHER THE MACHINE DIRECTION OR THE TRANSVERSE DIRECTION.
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