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Improved Baselayers in Electro-Erosion Recording Media

IP.com Disclosure Number: IPCOM000119296D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 72K

Publishing Venue

IBM

Related People

Cohen, MS: AUTHOR [+4]

Abstract

In electro-erosion printing, the recording medium is generally comprised of a substrate, a thin conductive layer, such as Al, a base layer located between the substrate and the Al layer and an overlayer on the Al layer. Both the base layer and the overlayer help to prevent scratching of the Al layer in areas where it is not to be eroded. However, high local temperatures produced during the printing process may cause softening and abrasion of some of the base layer compositions, especially in the case where thermally labile binders or polymers carrying pendant aromatic groups on the polymer chain are used. This can cause fouling and baking of the printhead and consequent degradation of print quality.

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Improved Baselayers in Electro-Erosion Recording Media

      In electro-erosion printing, the recording medium is
generally comprised of a substrate, a thin conductive layer, such as
Al, a base layer located between the substrate and the Al layer and
an overlayer on the Al layer.  Both the base layer and the overlayer
help to prevent scratching of the Al layer in areas where it is not
to be eroded. However, high local temperatures produced during the
printing process may cause softening and abrasion of some of the base
layer compositions, especially in the case where thermally labile
binders or polymers carrying pendant aromatic groups on the polymer
chain are used.  This can cause fouling and baking of the printhead
and consequent degradation of print quality.

      Organometalic binders can be used for base coat applications to
provide superior electroerosion paper. Specifically, we found that
polyorganosiloxanes, such as the polymers of glass resin type (made
by Owens Illinois Co.), when used as binders in base coat
compositions, form fast curing, hard and abrasion-resistant coatings
that can withstand high local temperatures and provide debris-free
printing.  Thermogravimetric analysis recording weight loss due to
decomposition as a function of temperature indicates that the
siloxane polymers generated primarily from trialkoxyalkyl- or
trialkoxylaryl siloxanes have much higher thermal stability than the
commonly employed non-silicon organic polymer systems.

      A representative segment of the organosiloxane polymer is shown
here, where R is...