-
公开(公告)号：JPH10258493A
公开(公告)日：1998-09-29
申请号：JP422098
申请日：1998-01-12
Applicant: TORAY INDUSTRIES
Inventor： TANAKA HIROYUKI , OKAMOTO KATSUYA , MIYAKE TORU
Abstract: PROBLEM TO BE SOLVED: To prevent occurrence of wrinkle, slack of a film in a depositing step by allowing output characteristics and traveling durability to be compatible. SOLUTION: In the biaxially oriented laminated film of at least two or more layers each containing polyethylene-2, 6-naphthalate as main component, a ratio Rz/Ra of surface roughness Ra to Rz of at least one surface is 6 to 10, and attenuation time (T) of charge in the case of forcibly charging the surface of the film at 20 and 65%R.H. is 100 to 300 sec, and further at least M/P of matrix polymer for constituting a laminated part of surface side is 1.0 to 3.0.
-
公开(公告)号：JP2510791B2
公开(公告)日：1996-06-26
申请号：JP4072291
申请日：1991-02-14
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NAKAJIMA SHOJI , OKAMOTO KATSUYA
-
公开(公告)号：JPH08111020A
公开(公告)日：1996-04-30
申请号：JP24618394
申请日：1994-10-12
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , OKAMOTO KATSUYA , ABE KOICHI
Abstract: PURPOSE: To improve durability by specifying the steam permeability, oxygen permeability, Young's module in the horizontal direction and thickness in a film consisting of polyethylene-2,6-naphthalene dicarboxylate. CONSTITUTION: The film consisting of polyethylene-2,6-naphthalene dicarboxylate is used. And, the steam permeability, the oxygen permeability and the Young's module in the horizontal direction are controlled to respectively .24hr, cm /cm .sec.cmHg and >=700kg/mm when the film thickness is 10μm. If the steam permeability and the oxygen permeability are larger than the range, the preservable durability of a magnetic layer under a high temp. high humidity condition is deteriorated. Then, by controlling the steam permeability and the oxygen permeability to the range and increasing the Young's module in the horizontal direction, the film excellent in durability and out-put characteristic is obtained.
-
公开(公告)号：JPH08106624A
公开(公告)日：1996-04-23
申请号：JP26138494
申请日：1994-09-30
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO KATSUYA , MIYAKE TORU , OKAZAKI IWAO
Abstract: PURPOSE: To obtain such a film suitable for a base film of a digital video magnetic tape that has high resistance against cutting in the production process or in a VTR, is inexpensive and has good electromagnetic conversion characteristics and off-tracking characteristics. CONSTITUTION: This film consists of a polyester containing >85mol% ethylene terephthalate in the repeating unit. The film has 3 to 8μm total thickness and >=500kg/mm modulus of elasticity (A) in the longitudinal direction and the difference |A-B| between (A) and the modulus of elasticity (B) in the width direction is . The surface roughness (Ra) of at least one surface of the film is 0.1 to 5nm, and the total thickness of the coating layer is
-
公开(公告)号：JPH08102043A
公开(公告)日：1996-04-16
申请号：JP23526594
申请日：1994-09-29
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , OKAMOTO KATSUYA , ABE KOICHI
Abstract: PURPOSE: To obtain a polyester film capable of ensuring superior tear resistance and capable of satisfactorily withstanding long-time recording by specifying the crystallizing characteristics and intrinsic viscosity of a film and the strength of the film in the transverse direction. CONSTITUTION: This biaxially oriented polyester film is made of polyethylene-2,6-naphthalenedicarboxylate and has an intrinsic viscosity of >=0.58, 20-80 deg.C difference between the crystallization temp. at the time of temp. rise and the glass transition temp. and >=700kg/mm Young's modulus in the transverse direction.
-
Patent Agency Ranking
公开(公告)号：JPH08102041A
公开(公告)日：1996-04-16
申请号：JP23350394
申请日：1994-09-28
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , OKAMOTO KATSUYA , ABE KOICHI
IPC: C08J5/18 , B29C55/00 , B29K67/00 , B29L9/00 , B32B27/36 , B32B33/00 , G11B5/73 , G11B5/78 , G11B5/704
Abstract: PURPOSE: To provide a polyester film capable of obtaining superior output characteristics based on film working characteristics and adaptable even to reduction in the thickness of a tape in future because of high strength. CONSTITUTION: This polyester film is made of polyethylene-2,6- naphthalenedicarboxylate and has >=700kg/mm Young's modulus in the longitudinal direction, >=50% breaking extension in the longitudinal direction, >=700kg/mm Young's modulus in the transverse direction and
-
公开(公告)号：JPH07296374A
公开(公告)日：1995-11-10
申请号：JP8488994
申请日：1994-04-22
Applicant: TORAY INDUSTRIES
Inventor： OKAZAKI IWAO , ABE KOICHI , OKAMOTO KATSUYA
Abstract: PURPOSE:To prepere a magnetic tape having excellent output characteristics by providing a magnetic layer on one side and a back coat layer on the other side and specifying the surface roughness on the magnetic surface and the back coat surface as well as the strength of the tape in the longitudinal and lateral directions. CONSTITUTION:The magnetic tape is made of a biaxially oriented polymer film principally comprising polyethylene-2,6-naphthalene dicarboxylate having a magnetic layer and a back coat layer, respectively, on the opposite sides thereof. The surface roughness is set at 5nm or less for the magnetic layer and in the range of 15-60nm for the back coat layer, Young's modulus is set at 500kg/mm or above and 800kg/mm or above, respectively, in the longitudinal and lateral direction of the tape having thickness and width being set, respectively, at 10mum or less and 8mm or less.
-
公开(公告)号：JPH06322152A
公开(公告)日：1994-11-22
申请号：JP11166193
申请日：1993-05-13
Applicant: TORAY INDUSTRIES
Inventor： ABE KOICHI , NAKAJIMA SHOJI , OKAMOTO KATSUYA
Abstract: PURPOSE:To obtain the subject film consisting essentially of a specific polyester, forming fine projection on the surface, excellent in abrasion resistance and effect for suppressing occurrence of powder in travelling a roll made of plastic and having biaxial orientation. CONSTITUTION:The objective film is a biaxially oriented film consisting essentially of a polyester A composed partially or wholly of a thermoplastic resin having
-
公开(公告)号：JPH06320618A
公开(公告)日：1994-11-22
申请号：JP13402693
申请日：1993-05-11
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO KATSUYA , ABE KOICHI , NAKAJIMA SHOJI
Abstract: PURPOSE:To obtain a polyester film having an ideal wear resistance and an improved winding stability by specifying the number of projections on a surface and further specifying the ratio of said number to the number of particles contained in a surface layer forming the surface. CONSTITUTION:In a biaxially oriented film mainly composed of a polyester A, the number of projections on a surface is 5X10 /mm or more, and a projection number/a particle number (NR), which is a ratio of the number of projections to the number of particles contained in a surface layer forming the surface, ranges from 2 to below 5. The kind of the polyester A is not particularly limited, but it is desirable that the polyester A has a crystalline parameter DELTATcg of 80 deg.C or lower and a solution haze of 20% or less when being dissolved in a solvent. Furthermore, a spherulite existing in an unoriented film before biaxially orienting preferably has a diameter (d) ranging 0.03-0.45mum.
-
公开(公告)号：JPH06210724A
公开(公告)日：1994-08-02
申请号：JP658493
申请日：1993-01-19
Applicant: TORAY INDUSTRIES
Inventor： OKAMOTO KATSUYA , ABE KOICHI , TANAKA HIROYUKI
IPC: B29C55/12 , B29K67/00 , B29L7/00 , B29L9/00 , B32B27/20 , B32B27/36 , C08L67/03 , G11B5/73 , G11B5/733 , G11B5/704
Abstract: PURPOSE:To provide a biaxially oriented thermoplastic resin film suitable as a base film for a video tape not generating the surface shaving of the base film even when repeated running is performed within a VTR, suppressed in drop out and holding running durability equal to that of a back coat layer. CONSTITUTION:In a biaxially oriented thermoplastic resin film constituted by laminating a layer (A-layer) consisting of polymer particles whose strength at the time of the 10%-deformation of particles is 3-30kgf/mm and a thermoplastic resin A on at least the single surface of a layer (B-layer) composed of a thermoplastic resin B, the ratio t/d of the thickness (t) of the A-layer and the average particle size (d) of the polymer particles contained in the thermoplastic resin A is set to 0.1-5 and the content of the particles in the thermoplastic resin is set to 1-20wt.%.
-
-
-
-
-
-
-
-
-
Search Results
134
records
(took 0.027 seconds)
