Biaxially oriented film of polyethylene-2,6-naphtalenedicarboxylate for magnetic recording floppy disks

摘要

PCT No. PCT/JP93/00422 Sec. 371 Date Dec. 2, 1993 Sec. 102(e) Date Dec. 2, 1993 PCT Filed Apr. 2, 1993 PCT Pub. No. WO93/20553 PCT Pub. Date Oct. 14, 1993.Provided are a biaxially oriented base film formed from polyethylene-2,6-naphthalenedicarboxylate as a raw material and a high-density magnetic recording floppy disk using the same. The base film and the floppy disk are characteristic in that they inhibit vibration in the film surface and have excellent viscoelasticity thereby to accomplish a contact with a magnetic head under given conditions even when rotated at high speed.