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公开(公告)号：JPH0929832A
公开(公告)日：1997-02-04
申请号：JP18177295
申请日：1995-07-18
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , ITO NOBUAKI , YONEYAMA WASUKE
Abstract: PROBLEM TO BE SOLVED: To provide an excellent film for storing data with less drop out and high elastic modulus, and a method for manufacturing the same. SOLUTION: This film is made of an organic polymer to satisfy A ), the number of the spots satisfies R>300.
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公开(公告)号：JPH08279139A
公开(公告)日：1996-10-22
申请号：JP8042995
申请日：1995-04-05
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , ITO NOBUAKI , TSUKUDA AKIMITSU
Abstract: PURPOSE: To obtain a superior data storage film excellent in running performance and ensuring little dropout. CONSTITUTION: A magnetic layer is formed on at least one side of a substrate film of an org. polymer to obtain the objective magnetic recording medium. The number of defects having >=200μm max. diameter and a depth corresponding to >=50% of the thickness of the substrate film in the film is .
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公开(公告)号：JPH08212536A
公开(公告)日：1996-08-20
申请号：JP3899395
申请日：1995-02-03
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , OKAMURA YUJI
Abstract: PURPOSE: To obtain a polyester film less in dropout and fit for a digital video tape by preparing a superior laminated film excellent in running performance, having satisfactory wear resistance of protrusions and free from surface defects. CONSTITUTION: This film is a film made chiefly of polyester and a group of fine protrusions made chiefly of a low mol.wt. body of the polyester exist on a face of the film on which a magnetic layer is formed. The peak height (h) (nm) of the fine protrusions each having 1-10μm major axis size and the number of the fine protrusions. A (per 100cm ) as follows; h>=0.27 and A 0.54 and A 0.81 and A 1.08 and A
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公开(公告)号：JP2000264983A
公开(公告)日：2000-09-26
申请号：JP6841899
申请日：1999-03-15
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To obtain a resin film that is suitably useful as a magnetic tape with reduced deformation along the edge parts by adjusting the resin film so that the relation between the increase in the stress and the elongation immediately before the breakage in the widthwise direction may satisfies a specific formula. SOLUTION: This invention is to prepare a film that satisfies formula I in the relation between the increase in the stress in the widthwise direction F (MPa) immediately before the breakage and the elongation S (%) immediately before the breakage. In a preferred embodiment, this film mainly comprises a polyamide resin. In order to satisfy the relation, for example, the density and crystallinity of the film are adjusted at a heat treatment step, or the difference in the Young's modulus in the longitudinal direction and in the widthwise direction is suppressed within a prescribed range, when the film is produced. In addition, the film is desirably to have a Young's modulus of >=7 GPa and the Young's modulus E (MPa) in the film width direction, F and S satisfy the relation of formula II.
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公开(公告)号：JPH1120003A
公开(公告)日：1999-01-26
申请号：JP18744897
申请日：1997-06-27
Applicant: TORAY INDUSTRIES
Inventor： OKASHIRO HIDETOSHI , TOYODA KATSUYA , OKUBO KENICHI
IPC: B29C47/88 , B29K101/12 , B29L7/00
Abstract: PROBLEM TO BE SOLVED: To obtain a sheet stably at high speed under high efficiency by a method wherein a blade-like electrostatic applicator is provided in the neighborhood of the lending point of a thermoplastic resin sheet to a cooling rotator and, in addition, the widthwise end parts of the thermoplastic resin sheet is pressed to a cooling rotator side with a pressing means provided in the neighborhood of the landing point. SOLUTION: A thermoplastic resin is widthwise broader at a mouthpiece 1 and then discharged into the form of a thermoplastic resin sheet 3 and quenched after being landed to a cooling rotator 2. In the neighborhood of this landing pint 2, a blade-like electrostatic applicator 4 is provided over nearly the whole surface of the thermoplastic resin sheet 3. The electrostatic applicator 4 is connected to a DC high tension power source so as to apply electrostatic charge to the thermoplastic resin sheet 3 so as to bring the sheet into close contact with the surface of the cooling rotator 2. In addition, at least one edge part of the sheet in the neighborhood of the landing point 8, a pressing means 9, in which a gas jetting device or the like is employed, is provided. As a result, the end part of the thermoplastic resin sheet 3 is prevented from getting inside out, resulting in realizing the efficient application of electrostatic charge to the thermoplastic resin sheet 3.
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Patent Agency Ranking
公开(公告)号：JPH0952967A
公开(公告)日：1997-02-25
申请号：JP11775896
申请日：1996-05-13
Applicant: TORAY INDUSTRIES
Inventor： TSUKUDA AKIMITSU , OKUBO KENICHI , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To obtain the subject film having a specific single extensibility, capable of preventing the carriage breakage and wrinkles of the film on its processing, the end surfaces disorder and cutting of the film on slitting, the lowering in the electromagnetic conversion characteristics of magnetic tape products and the irregular winding and edge damage to the magnetic tape products, and useful for magnetic recording media, etc. SOLUTION: An aromatic polyamide film such as the film of a polymer containing a repeating unit of formula I [Ar1 , Ar2 are each phenylene, a group of formula II (X is a single bond, O, methylene, CO, etc.,), etc.,] or a repeating unit of formula III (Ar3 is Ar1 ) in an amount of >=50mol%, especially >=70mol%, and having a single elongation of =1000kg/mm in the longitudinal direction.
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公开(公告)号：JPH08203064A
公开(公告)日：1996-08-09
申请号：JP916295
申请日：1995-01-24
Applicant: TORAY INDUSTRIES
Inventor： TSUKUDA AKIMITSU , OKUBO KENICHI , UEDA TOMOAKI
Abstract: PURPOSE: To produce a film excellent in traveling property, good in abrasion resistance against a projection and moreover excellent in non-defective property by using arom. polyamide or arom. polyimide film and using prescribed particles. CONSTITUTION: This film is formed out of an arom. polyamide or arom. polyimide. Org. polymer particles having 10-500nm average particle size and/or inorg. particles whose surface are treated with an org. polymer is incorporated in this film. And in this case, a center line surface roughness RaA of one side plane is 0.5-50nm and a center line average roughness RaB of the other side plane is
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公开(公告)号：JPH08147672A
公开(公告)日：1996-06-07
申请号：JP28498794
申请日：1994-11-18
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , OKAMURA YUJI , TAKAUCHI SHINJI
IPC: C08J5/18 , B29C55/12 , B29K67/00 , B29K105/16 , B32B27/36 , B32B33/00 , C08K9/04 , C08L67/00 , C08L67/02 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PURPOSE: To obtain a polyethylene-2,6-naphthalate film for digital video tapes which shows superior running properties, good abrasion resistance at projections thereof and also superior properties without defects at the surface thereof. CONSTITUTION: This is a film for magnetic recording media mainly comprising polyethylene-2,6-naphthalate, containing organic high-molecular particles of an average particle size of 10-500nm and/or inorganic particles processed at the surfaces thereof through an organic high-molecular treatment. The ratio of the average height of surface projections and the average size of the particles is 1/6-1/2 at least at one surface of the medium. Moreover, a surface roughness RaA on a center line of one face (A side) is 5-30nm and a surface roughness RaB on a center line of the other face (B side) is 10nm or smaller.
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公开(公告)号：JP2003112328A
公开(公告)日：2003-04-15
申请号：JP2002197267
申请日：2002-07-05
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , ITO NOBUAKI , YONEYAMA WASUKE
Abstract: PROBLEM TO BE SOLVED: To provide an excellent film having high elastic modulus, reduced in drop out and used for the storage of data. SOLUTION: This film comprises an organic polymeric material and, when the maximum diameter of adhesion spots present on at least the single surface of the film is set to R (μm) and the number of the adhesion spots per m is set to A, the number of the adhesion spots satisfying R>300 is A
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公开(公告)号：JP2000271998A
公开(公告)日：2000-10-03
申请号：JP7779599
申请日：1999-03-23
Applicant: TORAY INDUSTRIES
Inventor： OKUBO KENICHI , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To obtain a magnetic recording medium having small edge damage and output change and excellent performance and a film to be used as its base by making a maximum distance between a portion of a film placed at a horizontal plane and the horizontal plane and a film length satisfy a particular formula. SOLUTION: A maximum distance h between a portion of the film in the case of placing at a horizontal plane and the horizontal plane and a film length Lf satisfy h/Lf
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