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Ribbon Base Material

IP.com Disclosure Number: IPCOM000051074D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Acitelli, MA: AUTHOR [+3]

Abstract

The substrate of a resistive ink ribbon requires a film that has adequate tensile strength and tolerance for pigmentation to achieve the required degree of conductivity. The following formulations are examples of thermoset resin systems which can be finely tuned for these attributes: 1. Epoxy resin: Base Epoxy resin (EPON 872 (Trademark of Shell Chemical Co.)) 100 grams Methyl isobutyl ketone 5.6 grams OXITOL (Trademark of Shell Chemical Co.) 5.6 grams Xylene 5.6 grams Carbon Black (KETJEN (Trademark of Akzona Inc.)) 28-40 grams Curing System Curing agent (EPON U (Trademark of Shell Chemical Co.)) 24.0 grams Methyl isobutyl ketone 8.0 grams OXITOL (Trademark of Shell Chemical Co.) 9.

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Ribbon Base Material

The substrate of a resistive ink ribbon requires a film that has adequate tensile strength and tolerance for pigmentation to achieve the required degree of conductivity. The following formulations are examples of thermoset resin systems which can be finely tuned for these attributes: 1. Epoxy resin:

Base

Epoxy resin (EPON 872 (Trademark of Shell Chemical Co.))

100 grams

Methyl isobutyl ketone 5.6 grams

OXITOL (Trademark of Shell Chemical Co.) 5.6 grams

Xylene 5.6 grams

Carbon Black (KETJEN (Trademark of Akzona Inc.))

28-40 grams

Curing System

Curing agent (EPON U (Trademark of Shell Chemical Co.))

24.0 grams

Methyl isobutyl ketone 8.0 grams

OXITOL (Trademark of Shell Chemical Co.) 9.0 grams

Xylene 8.0 grams.

The process conditions for curing the 1:1 mixture of the base and the curing system can be anywhere from room temperature to elevated oven temperatures depending on available equipment. The ratios of resin, pigment and curing agent can be varied to allow "fine tuning" of desired conductivity. A second example is as follows: 2. Epoxy-urea resin:

Epoxy resin (EPON 828(Trademark of Shell Chemical

Co.)) 205 grams

Urea-formaldehyde resin 155 grams

Methyl isobutyl carbinol 87 grams

Methyl ethyl ketone 100 grams

Toluane 107 grams

Xylene 108 grams

Carbon black approx. 108 grams

Bake 20 min. @ 385 degrees F.

This resin permits variation of the resin-pigment ratios, as necessary, to obtain the desired conductivity level.

Other types of thermoset re...