Biaxially oriented laminate films and magnetic recording media

Details Biaxially oriented laminate films and magnetic recording media Biaxially oriented laminate films and magnetic recording media

1997-02-03

1999-06-15

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428212, 428213, 428457, 428480, 428482, 428483, 428694TR, 428694BR, 428694ST, 428694SL, 428694SG, 428900, G11B 5704

Patent

active

059120630

ABSTRACT:
A biaxially oriented laminate film comprising a thermoplastic resin layer A and a thermoplastic resin layer B which is laminated on one side of the thermoplastic resin layer A. The surface of the thermoplastic resin layer A has protrusions having an average height of 2 to 85 nm and an average width of 20 to 500 .mu.m, at a density of 4 to 2,500/mm.sup.2. The thermoplastic resin layer B contains inert fine particles, and the surface of the thermoplastic resin layer B is rougher than the surface of the thermoplastic resin layer A. The laminate film can have furher a layer C on the thermoplastic resin layer A. The surface of the thermoplastic resin layer C has protrusions having an average height of 2 to 85 nm and an average width of 20 to 500 .mu.m, at a density of 4 to 2,500/mm.sup.2. These laminate film are useful as a base film for magnetic recording medium.

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