Base film for magnetic recording tape with F-5 values of 9-15 Kg

Details Base film for magnetic recording tape with F-5 values of 9-15 Kg Base film for magnetic recording tape with F-5 values of 9-15 Kg

1984-06-27

1985-04-02

McCamish, Marion E.

Stock material or miscellaneous articles

Surface property or characteristic of web, sheet or block

428694, 428910, H01F 1000

Patent

active

045087822

ABSTRACT:
A base film for a magnetic recording tape is provided, which possesses an F-5 value of 9-15 Kg/mm.sup.2 as measured along both the longitudinal and transverse directions and in which the ratio of the average surface roughness to the particle size of included particles is 2.0.times.10.sup.-3 to 5.1.times.10.sup.-3. The average surface roughness is preferably 0.005-0.040 micron. The magnetic recording tape made therefrom exhibits an improved running property and an improved abrasion resistance as well as good surface characteristics.

REFERENCES:
patent: 3821156 (1974-06-01), Farrar
patent: 3901851 (1975-08-01), Kohno et al.
patent: 3958064 (1976-05-01), Brekken
patent: 3967025 (1976-06-01), Tanabe et al.
patent: 4071654 (1978-01-01), Egama et al.
patent: 4153920 (1979-05-01), Shirahata et al.
patent: 4190689 (1980-02-01), Fujita et al.
patent: 4202927 (1980-05-01), Afamaguchi et al.
patent: 4304807 (1981-12-01), Kawakami et al.
patent: 4309471 (1982-01-01), Suzuki et al.

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