Browse Prior Art Database

Lubricated Magnetic Media

IP.com Disclosure Number: IPCOM000087980D
Original Publication Date: 1977-Apr-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Cope, JR: AUTHOR [+4]

Abstract

Wear characteristics are improved by introducing a liquid lubricant into the back coat of magnetic recording tape.

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Lubricated Magnetic Media

Wear characteristics are improved by introducing a liquid lubricant into the back coat of magnetic recording tape.

Magnetic recording tape comprises a plastic substrate carrying a magnetic particle coating on its front and, often, a carbon-composition coating on its back. If lubricant is added to the front coat only, undesirable migration of lubricant from the front coat to the back coat occurs when the tape is stored in rolls. Depletion of lubricant from the front coat adversely affects tape performance.

Here, isocetyl stearate lubricant is introduced into the back coat as well as the front coat. This inhibits the undesirable migration and maintains an active quantity of lubricant in the front coat. A significant improvement in head-wear rate results.

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