-
Patent Agency Ranking
公开(公告)号：JP2002011786A
公开(公告)日：2002-01-15
申请号：JP2000195822
申请日：2000-06-29
Applicant: TORAY INDUSTRIES
Inventor： SUGII HIKARI , HOSOKAWA HIROBUMI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film reduced in the deviation of a recording track when the film is used for a magnetic tape and excellent in running durability as well as preservation stability. SOLUTION: The biaxially oriented polyester film is characterized in that a Poisson's ratio upon loading the load of 50 MPa in the lengthwise direction is within the range of 0.10-0.35 and a creep compliance in the lengthwise direction of the film when 30 minute is elapsed after loading the load of 28 MPa at a temperature of 50 deg.C is within the range of 0.1-0.3 Gpa-1 while a residual stress when 30 minute is elapsed after removing the load is within the range of 0-0.1%.
-
公开(公告)号：JP2000302892A
公开(公告)日：2000-10-31
申请号：JP11483999
申请日：1999-04-22
Applicant: TORAY INDUSTRIES
Inventor： KOTOURA MASAAKI , SUGII HIKARI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a polyester films excellent in the deformation under elongation of tapes and dimensional stability under the conditions of temperature and humidity assumed for service circumstances. SOLUTION: This polyester film has ethylene terephthalate as the major component and a long period of 110-120 Å, a ratio (I 847/I 874) of the peak intensity at 847 cm-1 to that at 874 cm-1 of 0.08-0.15, and a ratio (I 1041/I 874) of the peak intensity at 1041 cm-1 to that at 847 cm-1 of 0.35-0.45 in the infrared spectroscopy.
-
公开(公告)号：JP2002173540A
公开(公告)日：2002-06-21
申请号：JP2000371216
申请日：2000-12-06
Applicant: TORAY INDUSTRIES
Inventor： EGASHIRA KENICHI , SUGII HIKARI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a polyester film for a magnetic recording medium, capable of being sufficiently used as a supporter for the magnetic recording medium, especially the magnetic recording medium having very thin magnetic layer such as the one with
-
公开(公告)号：JP2000178367A
公开(公告)日：2000-06-27
申请号：JP26678799
申请日：1999-09-21
Applicant: TORAY INDUSTRIES
Inventor： SUGII HIKARI , KOTOURA MASAAKI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To provide a polyester film differs less in properties in the direction of width, showing excellent productivity, and being desirable for e.g. printer ribbons, capacitors, printing plates, photos, and cards. SOLUTION: Provided are a process for producing a polyester film which comprises orienting an unoriented film based on polyethylene terephthalate in the machine and transverse directions, cooling the film to the glass transition temperature or lower, and irradiating the film with UV light from at least either of the directions of thickness of the film and a polyester film produced by the above process.
-
公开(公告)号：JP2000141474A
公开(公告)日：2000-05-23
申请号：JP22246599
申请日：1999-08-05
Applicant: TORAY INDUSTRIES
Inventor： KOTOURA MASAAKI , SUGII HIKARI , TSUNEKAWA TETSUYA
Abstract: PROBLEM TO BE SOLVED: To obtain a polyester film low in heat shrinkage factor and capable of being widely put to practical use as a polyester film suitable for a magnetic recording medium, a printing ribbon, a condenser or packing. SOLUTION: A polyester film is produced by stretching an unstretched film based on polyethylene terephthalate in at least one of the longitudinal and lateral directions thereof and subsequently irradiating this film with UV rays in at least one direction of the thickness direction thereof to reduce the heat shrinkage factor of the film. Energy density at a time of the irradiation with UV rays is pref. 0.1-10 J/cm2.
-
-
-
-
Search Results
5
records
(took 0.022 seconds)
