发明名称 Magnetic tape
摘要 <p>A magnetic tape for audio cassettes wherein a magnetic layer is provided on base film characterized in that the base film is biaxially oriented polyethylene-2,6-naphthalate film having a Young's modulus in the longitudinal direction of 850 Kg/mm<2> or more, a Young's modulu in the transverse direction of 550 Kg/mm<2> or more a surface roughness Ra in the range of 0.015 to 0.040 mu m, and a thermal shrinkage rate in the longitudinal direction of 0.3 % or less in case where it was held at a temperature of 100 DEG C for 1 hour. A magnetic tape for audio cassettes is provided which is capable of long-time recording and wherein deterioration of magnetic characteristics does not easily occur in use, storage and the like at a high temperature, for example in the open at summer seasons or in cars, compared to conventional ones.</p>
申请公布号 EP0500018(B1) 申请公布日期 1996.09.04
申请号 EP19920102612 申请日期 1992.02.17
申请人 TEIJIN LIMITED 发明人 ETCHU, MASAMI;HAMANO, HISASHI;HOSOI, MASAHIRO;SAEKI, YASUHIRO
分类号 G11B5/78;B32B27/36;C09D5/23;C09D7/12;G11B5/73;(IPC1-7):G11B5/704 主分类号 G11B5/78
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