Liner sheet containing a lubricant and an antistatic agent for m

Details Liner sheet containing a lubricant and an antistatic agent for m Liner sheet containing a lubricant and an antistatic agent for m

1978-06-29

1979-05-15

Cannon, J.C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

118 77, 156164, 15624427, 156281, 156306, 156324, 184 1E, 184 16, 184102, 264238, 264288, 264DIG47, 428286, 428287, 428288, 428289, 428293, 428302, 428317, B32B 526, B32B 2702, B32B 3300, F16N 1500

Patent

active

041548868

ABSTRACT:
A liner sheet for a magnetic tape cartridge, said sheet being a fibrous sheet containing thermoplastic synthetic fibers with at least those fibers which are in its surface layer being bonded as a result of heat melting, said fibrous sheet having (1) an apparent specific gravity 0.55 to 0.85 time the specific gravity of the polymer constituting the fibers, (2) air permeability expressed by a pressure drop of not more than 200 cm Aq/mm when air is caused to flow at a speed of 10 cm/sec in a direction perpendicular to the surface of the sheet and (3) a thickness of 50 to 300 microns, and said fibrous sheet containing in its structure a lubricant and an antistatic agent dispersed therein. The liner sheet can be produced by interposing a fibrous sheet containing thermoplastic synthetic fibers and having the antistatic agent applied thereto between fibrous sheets containing thermoplastic synthetic fibers and having the lubricant applied thereto, and hot-pressing the resulting laminate to melt-bond at least those fibers which are in the surface layer of the laminate; and has superior abrasion resistance, a high level of a lubricating surface, antistatic properties and the ability to reduce noises which occur during running of a magnetic tape.

REFERENCES:
patent: 2355003 (1944-08-01), McCann
patent: 2426838 (1947-09-01), Miller
patent: 3130933 (1964-04-01), Pillsburg et al.
patent: 3319012 (1967-05-01), Reed et al.
patent: 3993824 (1976-11-01), Shirahato et al.
patent: 4091158 (1978-05-01), Kasuga et al.

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