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公开(公告)号：JP2001277339A
公开(公告)日：2001-10-09
申请号：JP2001009160
申请日：2001-01-17
Applicant: TORAY INDUSTRIES
Inventor： SAKAMOTO JUN , TSUNASHIMA KENJI , MACHIDA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To manufacture a laminated polyamide resin sheet of high quality suitable for packaging food with good productivity. SOLUTION: The laminated polyamide resin sheet discharged from a cap in a molten state is charged by the application of voltage to the electrode arranged above the sheet and brought into close contact with a rotary cooling body to be cooled. As a resin laminated to a polyamide resin, a thermoplastic resin A, of which the melt specific resistance is 10 times or more that of the polyamide resin, is used.
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公开(公告)号：JP2001226508A
公开(公告)日：2001-08-21
申请号：JP2000039039
申请日：2000-02-17
Applicant: TORAY INDUSTRIES
Inventor： SAKAMOTO JUN , TSUNASHIMA KENJI , MACHIDA TETSUYA
IPC: C08J9/00
Abstract: PROBLEM TO BE SOLVED: To prepare a low density thermoplastic resin sheet suitable for a high quality and low cost sheet replacing for paper, and excellent in whiteness and hiding properties. SOLUTION: This low density thermoplastic resin sheet comprises particles A comprising a polymer material having a crosslinking structure. Around the particles A, a space is formed between the particles and the thermoplastic resin. The low density thermoplastic resin sheet has an apparent density of 0.7 g/cm3 or lower and is obtained adding by a thermoplastic resin particles comprising a cross linked polymer material to the thermoplastic resin, and extruding and stretching the resulting resin composition.
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公开(公告)号：JP2000271999A
公开(公告)日：2000-10-03
申请号：JP7950699
申请日：1999-03-24
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI , SAKAMOTO JUN
Abstract: PROBLEM TO BE SOLVED: To highly satisfy smoothness and slipperiness requirements of a biaxially oriented film with good productivity by incorporating protrusions each having a height of a specific range and a mean diameter of a specific range at least on one side surface. SOLUTION: The biaxially oriented film comprises protrusions each having a height of 0.05 to 1 μm and a mean diameter of 50 to 500 μm. The protrusions are each desirably formed of a resin forming the film. In the case of forming the protrusions by using particles, the film is used as a recording medium. If the film is fed in a machine, a surface of the film is scraped, and a problem of falling-off of the particles is apt to arise, but if the protrusions are formed of the resin itself, such a phenomenon of falling-off scarcely occurs. As a means for forming the protrusions made of the resin forming the film, its surface is transferred by a roll having recesses on its surface, and then biaxially oriented to form the protrusions.
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公开(公告)号：JP2000263572A
公开(公告)日：2000-09-26
申请号：JP2000000340
申请日：2000-01-05
Applicant: TORAY INDUSTRIES
Inventor： SAKAMOTO JUN , TSUNASHIMA KENJI , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To provide both excellent productivity and quality by casting a thermoplastic resin sheet extruded from a mouthpiece while sandwiching the sheet between a roll and a cooling medium existing a DC potential difference. SOLUTION: A raw material such as a liquid crystal polymer obtained by adding to blend a polyethylene terephthalate resin or another compound, another polyester resin or the like is dried, dehydrated, then supplied to a melt extruder such as a monoaxial extruder, a biaxial extruder or the like, and melt extruded in a nitrogen flow or in vacuum so as not to lower its molecular weight and its intrinsic viscosity. A melt sheet extruded from a mouthpiece 1 by the melt polyester resin is cast to be sandwiched between a roll 2 applied by a predetermined voltage and a casting drum 6, brought into close contact with a drum of a cooling medium, quenched, cast at a high speed with a stably strong close contact force, and the obtained cast sheet 1 is oriented as needed. Thus, the casting speed can be accelerated, and the high quality sheet 7 can be manufactured with good productivity.
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公开(公告)号：JP2000211014A
公开(公告)日：2000-08-02
申请号：JP1755799
申请日：1999-01-26
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , SAKAMOTO JUN , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To obtain, at a high speed, a thermoplastic resin sheet with both excellent productivity and quality by using a freely rotating roll as an electrified roll in a method for preparing the thermoplastic resin sheet wherein after a thermoplastic resin is melted, a molten sheet is extruded from a nozzle and it is cooled and solidified while it is placed between the electrified roll and a cooling medium. SOLUTION: A molten thermoplastic resin sheet is cast while it is placed between a freely rotating electrified roll and a cooling medium. It is possible thereby to provide a large electric charge density (an electric current) by a relatively low electric voltage to the molten resin sheet as the electric charge is directly provided to the sheet without placing air. Therefore, it is brought into strongly intimate contact with the cooling medium to improve high speed adhesive properties and uniformity of thickness. In this case, as the thermoplastic resin, especially polyester resins and polyamide resins are pref. In addition, electrostatic charging effectively acts in a case where resistivity during the resin is melted is large, at least 108 Ωcm. In addition, thickness fluctuation is generated on the resin sheet when rotational torque of the electrified roll is 300 g or larger.
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Patent Agency Ranking
公开(公告)号：JP2000202906A
公开(公告)日：2000-07-25
申请号：JP900699
申请日：1999-01-18
Applicant: TORAY INDUSTRIES
Inventor： MIYAGAWA KATSUTOSHI , TSUNASHIMA KENJI , SAKAMOTO JUN
Abstract: PROBLEM TO BE SOLVED: To realize a higher forming speed with a favorable productivity by a method wherein the surface of a roller has a structure through which air can escape, so that no trouble such as the transferring to a sheet surface and accumulation of low molecular substances due to the structure occurs. SOLUTION: This forming roll is to cool a fused polymer extruded in a sheet-like shape through a mouthpiece and form the polymer into a sheet under the state that its surface has minute surface depressions 11, the depth 12 of each of which is 0.05-1 μm. By applying an electrical voltage near the landing of the fused polymer extruded in a sheet on the forming roll, the sheet is brought into close contact with the roll, resulting in being formed into the fused polymer sheet.
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公开(公告)号：JP2000158455A
公开(公告)日：2000-06-13
申请号：JP36561898
申请日：1998-12-22
Applicant: TORAY INDUSTRIES
Inventor： SAKAMOTO JUN , TSUNASHIMA KENJI
Abstract: PROBLEM TO BE SOLVED: To give no surface fault to a treated film by incorporating a surface layer in a photocatalyst layer, scarcely depositing an impurity, a foreign matter or the like on a wall plate surface layer and decomposing it even when deposited. SOLUTION: A photocatalyst layer on a surface layer changes water and oxygen into active oxygen by oxidizing and reducing operations by emitting a light, and decomposes an organic material and an inorganic material into a carbonic acid gas and water. As the photocatalyst, oxide, carbide or sulfide of a transition metal such as TiO2, WO3, SiC, MoS2 or the like is used. A sol liquid of titanium oxide, silicon oxide, Teflon, titanium peroxide or the like with a binder is sprayed on a partition wall plate body or baked and solidified after impregnating, or flame-coated with titanium oxide powder directly or after mixing with other ceramics, or metal titanium is oxidized on its surface layer by anodizing or surface oxidizing or the like to form a titanium oxide layer. Thus, it is less necessary to periodically clean the plate. The layer is used on the plate of a heater to avoid giving a fault to a surface of a resin film made of a thermoplastic resin or the like.
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公开(公告)号：JP2000143830A
公开(公告)日：2000-05-26
申请号：JP32641698
申请日：1998-11-17
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , SAKAMOTO JUN , MIYAGAWA KATSUTOSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a thermoplastic resin sheet having improved Young's modulus of elasticity and hot dimensional stability in improved productivity by cooling a molten thermoplastic resin sheet by close adhesion to a cooling drum carrying liquid drops or a liquid film and exerting on the film an action which adds thereto an adhesive force in the direction of the normal of the drum when the film is cooled to a temperature near the melt crystallization initiation temperature of the resin. SOLUTION: A thermoplastic resin such as a polyamide resin having a relative viscosity of 30 meq/kg or above is melt-extruded at a draft ratio of 1 or above in a stream of nitrogen or in a vacuum to obtain a molten thermoplastic resin sheet. This sheet is closely adhered to a cooling drum carrying liquid drops or a liquid film and having a surface temperature of 10-95 deg.C, desirably, 20-80 deg.C and then subjected to a means for exerting an adhesive force in the direction of the normal of the drum when the film is cooled to a temperature near the melt crystallization initiation temperature of the resin to obtain a cast sheet having a thickness of 5 μm to 1 mm. This sheet is heated to 50-210 deg.C, unidirectionally oriented at a draft ratio of 1.1-1.7, and heat-treated.
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公开(公告)号：JP2000103000A
公开(公告)日：2000-04-11
申请号：JP27303198
申请日：1998-09-28
Applicant: TORAY INDUSTRIES
Inventor： TSUNASHIMA KENJI , SAKAMOTO JUN
IPC: B32B7/02
Abstract: PROBLEM TO BE SOLVED: To improve surface properties such as abrasion resistance, scratch resistance, and cutting resistance by making the intrinsic viscosity of at least one side of a thin surface layer greater by a specified quantity then that of a thick inner layer. SOLUTION: In a thermoplastic resin layer in which the intrinsic viscosity ηs of at least one side of a thin surface layer is greater by at least 0.05 than that ηe of a thick inner layer, it is requisite for surface properties such as abrasion resistance and cutting resistance that the molecular weight of the surface layer is greater than that of the inner layer. When the difference in the intrinsic viscosity η values is under 0.05, or when there is no difference in the intrinsic viscosity η values, the desired surface properties can hardly be obtained. Good surface properties can not be obtained in a single layer sheet having high intrinsic viscosity η. The surface of a tough surface layer alone is vulnerable to scratching; however, the existence of the thin layer having high intrinsic viscosity η allows scratching energy to be absorbed in the thickness direction of the sheet.
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公开(公告)号：JPH11333861A
公开(公告)日：1999-12-07
申请号：JP7033999
申请日：1999-03-16
Applicant: TORAY INDUSTRIES
Inventor： SAKAMOTO JUN , TSUNASHIMA KENJI , MINAMIZAWA HIDEHITO
IPC: B29C35/06 , B29C55/02 , B29K101/12 , B29L7/00 , D01D13/00
Abstract: PROBLEM TO BE SOLVED: To provide a method and apparatus for producing a continuous molded product of a thermoplastic resin which prevent the product defects from being caused by avoiding deposition of a sublimate such as an oligomer near a heating process device, and which permits reduction of the cleaning work load which is often performed. SOLUTION: In a method and apparatus for producing a continuous molded product wherein the continuous molded product (M) of a thermoplastic resin is thermally processed at heating process portions 2, 4, 5, photocatalyst layers 7 are provided on the surfaces of the external walls of covers 6a, 6b, 6c, 6d, 6e covering the heating process portions 2, 4, 5 or on the surfaces of the external walls of the heating process portions 2, 4, 5, thereby illuminating the light to the photocatalyst layers 7 from the light illuminating means 8.
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