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Paper Impregnation for Thermal Transfer Resistive Ribbons

IP.com Disclosure Number: IPCOM000039535D
Original Publication Date: 1987-Jun-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Aviram, A: AUTHOR [+3]

Abstract

Thermal transfer resistive ribbon (R2T2) currently being used, consists of three layers as follows: a. A conductive substrate made of polycarbonate and graphite l6 mm thick. b.An aluminum layer 1000 o thick. c.An ink layer 5 mm thick. The manufacturing steps of the ribbon include solvent coating of layer (a) onto a MYLAR* substrate and subsequent addition of the other two layers. The solvent used for coating of layer (a) is methylene chloride. It is regarded rather important to develop an alternative composition for R2T2 that would not require use of organic solvents due to environmental constraints. A substrate for R2T2 that conforms with the last requirement and is based on paper impregnation has been developed here. The paper provides the tensile strength for the ribbon substrate.

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Paper Impregnation for Thermal Transfer Resistive Ribbons

Thermal transfer resistive ribbon (R2T2) currently being used, consists of three layers as follows: a. A conductive substrate made of polycarbonate and graphite l6 mm thick. b.An aluminum layer 1000 o thick. c.An ink layer 5 mm thick. The manufacturing steps of the ribbon include solvent coating of layer (a) onto a MYLAR* substrate and subsequent addition of the other two layers. The solvent used for coating of layer (a) is methylene chloride. It is regarded rather important to develop an alternative composition for R2T2 that would not require use of organic solvents due to environmental constraints. A substrate for R2T2 that conforms with the last requirement and is based on paper impregnation has been developed here. The paper provides the tensile strength for the ribbon substrate. The impregnating substances enhance that tensile strength and add other required properties, such as conductivity. Capacitor paper 0.65 mil thick (Kimberly Clark) has been found suitable because of its thickness.

It was observed in our laboratories that a number of water latex dispersions (a list follows at the end of the text) can be used to coat paper, resulting in an unwrinkled end product. This is in contrast to what occurs naturally when paper is wetted with water and dried. Those latex dispersions mixed with solid conductive particles, such as graphite, can be used to impart conductivity to the paper and seal the voids,...