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公开(公告)号：JP2000141386A
公开(公告)日：2000-05-23
申请号：JP32557598
申请日：1998-11-16
Applicant: TORAY INDUSTRIES
Inventor： NISHIHARA KENTA , YASHIRO TOSHIYA , TSUKUDA AKIMITSU
Abstract: PROBLEM TO BE SOLVED: To increase a film forming speed in soln. film-forming and to obtain a film or sheet-shaped molded object excellent in surface properties or flatness. SOLUTION: An org. polymer soln. is cast on a support and a solvent is removed to obtain a film or sheet-shaped molded object. In this case, a solvent having compatibility with respect to the solvent mainly used in the org. polymer soln. is interposed between the support and the cast org. polymer soln. film so that soln. film thickness t (μm) and cast polymer thickness T (μm) satisfy the relation of formula 0.001
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公开(公告)号：JP2002144356A
公开(公告)日：2002-05-21
申请号：JP2000346873
申请日：2000-11-14
Applicant: TORAY INDUSTRIES
Inventor： NISHIHARA KENTA , SUEOKA MASANORI , ITO NOBUAKI
IPC: B29C41/28
Abstract: PROBLEM TO BE SOLVED: To ensure the stable manufacture of an aromatic polyamide film even when the film manufacturing rate is high in the extrusion of a resin solution during the manufacture of the aromatic polyamide film by a solution film formation process and make the surface characteristics and face smoothness of the film satisfactory. SOLUTION: An aromatic polyamide solution is extruded onto the upper surface of an endless belt 4 traveling by means of a plurality of rotary drums 2 and 2' to form the film 5. Then this film 5 is made to proceed in a fixed direction while the film 5 is kept in contact with the endless belt 4 and hardened. In this method for manufacturing the aromatic polyamide film through a film formation process, the direction in which the endless belt 4 proceeds is tilted -45 to +45 deg. to the downward perpendicular direction G.
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Patent Agency Ranking
公开(公告)号：JP2000351185A
公开(公告)日：2000-12-19
申请号：JP16529099
申请日：1999-06-11
Applicant: TORAY INDUSTRIES
Inventor： YASHIRO TOSHIYA , NISHIHARA KENTA , TSUKUDA AKIMITSU
Abstract: PROBLEM TO BE SOLVED: To shorten the time of releasing a film off a substrate, manufacture the film at a high speed, improve the corrosion and winding properties of a substrate and improve the productivity at a low cost by laminating another layer of another specified value of a metal ion content at least on one face of a layer of a specified value of a metal ion content. SOLUTION: A film is a laminated film formed of two layers or more, and constituted of a layer A containing 2-1,000 ppm meal ions, on one face of which a layer B of less than 2 ppm metal ion content is laminated. When the metal ion content of the layer A is less than 2 ppm, the film is easily charged to form a defective winding shape, while when the content therein is beyond 1,000 ppm, the film is short of flexibility and the elongation is smaller and easily to be cut to cause the lowering of yield. When the metal ion content is less than 2 ppm, the release properties of the film off a substrate is good in the manufacture of the film to shorten the drying time and improve the film manufacturing rate, while when the content is 2 ppm or more, the release properties become worse. Thus the good release properties and winding properties of the film for the substrate are provided to carry out the high speed film manufacture, the corrosion of the substrate is hard to be generated, productivity is superior and the cost is low.
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公开(公告)号：JP2001167425A
公开(公告)日：2001-06-22
申请号：JP34964699
申请日：1999-12-09
Applicant: TORAY INDUSTRIES
Inventor： NISHIHARA KENTA , YASHIRO TOSHIYA , TSUKUDA AKIMITSU
IPC: G11B5/73
Abstract: PROBLEM TO BE SOLVED: To provide a support which is used for magnetic recording medium, can be made thinner and is excellent in electromagnetic transducing characteristic and durability, and to provide a magnetic recording medium. SOLUTION: This support consists of the combined layer of a support layer comprising an aromatic polyamide film having 1-8 μm thickness t1 and a metal layer of thickness t2 formed on at least one side of the support layer. The Young's modulus of the support in at least one direction is made to be 18 GPa or larger and t1/t2 is made to be 2.5-20.0.
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公开(公告)号：JP2002292732A
公开(公告)日：2002-10-09
申请号：JP2001094854
申请日：2001-03-29
Applicant: TORAY INDUSTRIES
Inventor： NISHIHARA KENTA , SUEOKA MASANORI , ITO NOBUAKI
IPC: B29C55/02
Abstract: PROBLEM TO BE SOLVED: To provide a method for obtaining an aromatic polyamide film which can be stretched by a high stretch ratio and stably and develops high mechanical properties when being stretched by a high stretch ratio by regulating the state of a polymer sheet before being immersed in a solvent in a method for produc ing the aromatic polyamide film in which the polymer sheet having self- holdability is immersed in a specified solvent liquid, and the plasticized sheet is stretched. SOLUTION: The polymer sheet 0.05-5 GPa in Young's modulus containing the aromatic polyamide and a solvent is stretched while being contacted with a mixed solvent which contains the first solvent at least 3 wt.% in solubility of the aromatic polyamide and the second solvent below 3 wt.% in solubility of the aromatic polyamide in a composition ratio by weight (the first solvent/the second solvent) of 90/10-30/70.
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公开(公告)号：JP2006225499A
公开(公告)日：2006-08-31
申请号：JP2005040398
申请日：2005-02-17
Applicant: TORAY INDUSTRIES
Inventor： NISHIHARA KENTA , TSUKUDA AKIMITSU , SUEOKA MASANORI
Abstract: PROBLEM TO BE SOLVED: To provide an aromatic polyamide porous film excellent in formation of thin film and capable of readily controlling stable porous characteristics. SOLUTION: The aromatic polyamide porous film has a structure (three-dimensional network) in which a fibrous body containing an aromatic polyamide is joined through a joining part and at least three fibrous bodies are joined to the joining part. COPYRIGHT: (C)2006,JPO&NCIPI
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公开(公告)号：JPH11170283A
公开(公告)日：1999-06-29
申请号：JP36185297
申请日：1997-12-10
Applicant: TORAY INDUSTRIES
Inventor： YASHIRO TOSHIYA , CHIKUGI TOSHIHIRO , NISHIHARA KENTA
Abstract: PROBLEM TO BE SOLVED: To increase a film making speed in solution film making and to obtain a film or a sheet-like molding which is excellent in surface properties and flatness. SOLUTION: In the method in which an organic polymer solution is cast on a support to form a film or a sheet-like molding, a mixed solvent of a solvent which is not compatible with the polymer but compatible with the solvent and a solvent which is compatible with both the polymer and the solvent is placed between the support and an organic polymer solution membrane to be cast.
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