Magnetic recording tape and method for manufacturing the same
AssigneeFuji Photo Film Co., Ltd.
InventorYoshiyuki Nabata
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Abstract
A magnetic recording tape having improved durability and capable of conducting recording and reproduction of data with high reliability, and a method for manufacturing the same are provided. The magnetic recording tape comprises a substrate having a thickness equal to or less than 7 μm and at least one magnetic layer provided on one surface of the substrate, and the magnetic recording tape has a longitudinal creep deformation ratio in a range of less than 0.04% when the magnetic recording tape is subjected to a longitudinal tensile stress of 19.1 MPa for 25 minutes at 50° C.
Claims13
A magnetic recording tape which comprises a flexible substrate having a thickness equal to or less than 7 μm and at least one magnetic layer provided on one surface of the substrate, said magnetic recording tape having a longitudinal creep deformation ratio in a range of 0.012 to 0.038% when the magnetic recording tape is subjected to a longitudinal tensile stress of 19.1 MPa for 25 minutes at 50° C.
A method for manufacturing a magnetic recording tape comprising a flexible substrate having a thickness equal to or less than 7 μm and a magnetic layer provided on one surface of the substrate, the method comprising subjecting said magnetic recording tape to a heating treatment at such a temperature (T) below the equilibrium glass transition temperature (ETg) of the substrate that (Etg-T) is from 1 to 25° C. for 0.5 to 240 hours, thereby obtaining said magnetic recording tape having a longitudinal creep deformation ratio in a range of 0.012 to 0.038% when the magnetic-recording tape is subjected to a longitudinal tensile stress of 19.1 MPa for 25 minutes at 50° C.
Dependencies are inferred from the claim text.