Browse Prior Art Database

Polyamide Correctable Resistive Ribbon Ink

IP.com Disclosure Number: IPCOM000040164D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Bailey, WD: AUTHOR [+4]

Abstract

Resistive ribbon thermal transfer printing employs ribbons having a resistive support layer, a thin aluminum interlayer, and an ink outer layer, which is transferred by heat generated in the ribbon itself. Lift-off correction is achieved by employing the print ribbon at intermediate heat to affix printed characters to the ribbon. This is described in U.S. Patent 4,384,797. An ink layer which is predominantly of polyamide may be used for this purpose by also incorporating a resin which melts at 10 to 20 degrees C below the melting point of the polyamide. A representative formula by weight for this ink layer is as follows: polyamide (MACROMELT 6202*) 72%, hydrogenated rosin ester (STAYBELITE 10**) 10%, and carbon black pigment (REGAL 99R***) 18%.

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Polyamide Correctable Resistive Ribbon Ink

Resistive ribbon thermal transfer printing employs ribbons having a resistive support layer, a thin aluminum interlayer, and an ink outer layer, which is transferred by heat generated in the ribbon itself. Lift-off correction is achieved by employing the print ribbon at intermediate heat to affix printed characters to the ribbon. This is described in U.S. Patent 4,384,797. An ink layer which is predominantly of polyamide may be used for this purpose by also incorporating a resin which melts at 10 to 20 degrees C below the melting point of the polyamide. A representative formula by weight for this ink layer is as follows: polyamide (MACROMELT 6202*) 72%, hydrogenated rosin ester (STAYBELITE 10**) 10%, and carbon black pigment (REGAL 99R***) 18%. The resins and the colorant carbon black are dissolved and dispersed in solvents, specifically, isopropanol and toluene. Coating is made on the aluminum side of an aluminized resist to yield a final coat weight of 3.0 pounds ink per ream. The rosin ester or equivalent additive does not interfere with the adhesion of polyamide to the aluminum when cool. During heating, it does interact with the aluminum, causing printing at lower temperatures. In a typical system, print power is reduced by one-third. Alternative low-melting additives are polyesters, for example, PRINCE 5130**** polyester and polyketones, for example, K-1717 MMP**** polyketone. The resins are incorporated in the ink...