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Low-chloride-ion Carbon Black Ink Resistive Ribbon Ink

IP.com Disclosure Number: IPCOM000060612D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bowlds, PA: AUTHOR [+3]

Abstract

In resistive printing ribbon, a polycarbonate resistive layer filled with conductive carbon black carries a very thin conductive layer of aluminum. Peeling of aluminum is minimized the carbon black has low chloride ion content.

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Low-chloride-ion Carbon Black Ink Resistive Ribbon Ink

In resistive printing ribbon, a polycarbonate resistive layer filled with conductive carbon black carries a very thin conductive layer of aluminum. Peeling of aluminum is minimized the carbon black has low chloride ion content.

Other factors may tend to cause the peeling, but the purity of the carbon black in the resistive layer is one, independent factor. A carbon black having chloride ion content of about 0.1% by weight is a factor in loss of aluminum adhesion. Conversely, a carbon black having a chloride ion content of less than
0.007% by weight minimizes peeling of aluminum. Commercially available Knapsack (American Hoechst Corporation) carbon black is a preferred low- chloride-ion carbon black for this purpose.

Disclosed anonymously.

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