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Liquid Lubricant For Flexible Magnetic Recording Tape

IP.com Disclosure Number: IPCOM000052070D
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bruce, CA: AUTHOR [+2]

Abstract

Lubrication of flexible magnetic recording media is necessary to reduce wear of the media and the recording head. Furthermore, the friction between the head and the media should be low to prevent sticking. In order for a liquid lubricant to be effective, it should migrate to the head-media interface where it is required, and it should continue to migrate throughout the lifetime of the media. A liquid lubricant of glycerol tri-oleate or glycerol di-oleate has been found to reduce the friction of magnetic media and to be stable with time.

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Liquid Lubricant For Flexible Magnetic Recording Tape

Lubrication of flexible magnetic recording media is necessary to reduce wear of the media and the recording head. Furthermore, the friction between the head and the media should be low to prevent sticking. In order for a liquid lubricant to be effective, it should migrate to the head-media interface where it is required, and it should continue to migrate throughout the lifetime of the media. A liquid lubricant of glycerol tri-oleate or glycerol di-oleate has been found to reduce the friction of magnetic media and to be stable with time.

An aqueous dispersion of magnetic oxide was deposited onto a polyethylene terephthalate substrate and sealed, using a polyurethane binder and the lubricant. The glycerol tri-oleate and the glycerol di-oleate internally lubricated media had a lower frictional force than liquid lubricants, such as tri-decyl stearate or isocetyl stearate. Further, the glycerol di-oleate and glycerol tri-oleate lubricated media showed little or no loss of lubricating properties over a nine to ten month's storage period.

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