B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/08 (2006.01) B32B 27/32 (2006.01) B32B 27/36 (2006.01) G11B 5/73 (2006.01) G11B 5/84 (2006.01)
Patent
CA 2062398
- 20 - ABSTRACT OF THE DISCLOSURE A polyester film prepared through a lamination of at least two layers by coextrusion, wherein one of exposed surfaces (surface A) has a center line average roughness of from 0.002 to 0.015 µm, a polyester layer forming the other of the exposed surfaces (surface B) has a lower melting point than a polyester forming the surface A, and the surface B has a degree of planar orientation of not larger than 0.100, which can be used as a base film for magnetic recording tape having no back coating.
Inagaki Masashi
Utsumi Shigeo
Watanuki Yuko
Diafoil Hoechst Company Limited
Kirby Eades Gale Baker
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