Magnetic recording medium having an atmospheric plasma modified substrate
AssigneeImation Corp.
InventorChur Vang
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Abstract
A magnetic recording medium having a polyester substrate with at least one magnetic recording layer coated thereon, wherein the substrate is a polyester film which has been modified by atmospheric plasma treatment prior to coating. The treated substrate film exhibits a contact angle of at least about 20 degrees less than the contact angle of an unmodified polyester film and has an average peel adhesion to a magnetic recording coating of at least about 0.2 N/mm.
Claims24
A polyester film suitable for use as a substrate for a magnetic recording medium, said film having at least one surface modified by atmospheric plasma treatment, said film exhibiting a contact angle of at least about 20 degrees less than the contact angle of an unmodified polyester film and has an average peel adhesion to a magnetic recording coating of at least about 0.2 N/mm.
A magnetic recording medium having a polyester substrate with at least one magnetic recording layer coated thereon, said substrate being a polyester film having at least one surface modified by atmospheric plasma treatment prior to coating wherein said magnetic recording layer has a mean peel adhesion to said substrate of at least about 0.2 N/mm.
A method of making a magnetic recording medium comprising the steps of
- a) providing a polyester film substrate,
- b) modifying said polyester film substrate by atmospheric plasma treatment wherein said film exhibiting a contact angle of at least about 20 degrees less than the contact angle of an unmodified polyester film, and
- c) subsequently coating said film substrate with at least one coating to form a magnetic recording medium.
Dependencies are inferred from the claim text.