Browse Prior Art Database

RELEASE AGENTS FOR FUSERS IN ELECTROSTATIC COPIERS

IP.com Disclosure Number: IPCOM000023610D
Original Publication Date: 1978-Jun-30
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 598K

Publishing Venue

Xerox Disclosure Journal

Abstract

It is well known in the art that toner particles can be fused to a substrate by contacting the toner particles upon the substrate with a heated fuser member bearing a coating of a polymer release material of the type which oxidizes and is capable of reacting with the material of the fuser member base. For example, in U.S. Patent 3,937,637 there is described a fuser roll structure for fusing toner images to a substrate wherein the toner images contact a rigid, thermally conductive core of a high surface energy material, such as glass or metal, having a coating of a polymer release material on the core, the polymer release material being the type which oxidizes and is capable of reacting with the core surface ma-terial. Polyethylene is one of the preferred polymer release materials.

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XEROX DISCLOSURE JOURNAL

RELEASE AGENTS FOR FUSERS IN Proposed Classification
ELECTROSTATIC COPIERS U.S. Cl. 148/6
Clifford 0. Eddy Int. Cl. C23f 7/00
Thomas R. Hoffend

It is well known in the art that toner particles can be fused
to a substrate by contacting the toner particles upon the
substrate with a heated fuser member bearing a coating of a
polymer release material of the type which oxidizes and is
capable of reacting with the material of the fuser member
base. For example, in U.S. Patent 3,937,637 there is
described a fuser roll structure for fusing toner images to a
substrate wherein the toner images contact a rigid, thermally
conductive core of a high surface energy material, such as
glass or metal, having a coating of a polymer release material
on the core, the polymer release material being the type which
oxidizes and is capable of reacting with the core surface ma-
terial. Polyethylene is one of the preferred polymer release
materials.

Although the foregoing fuser roll structures, having a coating
of a polymer release material of the type which oxidizes and
is capable of reacting with the core surface material thereon,
provide excellent release of molten toner, there is the long-
term disadvantage of gelation with certain of the polymer
release materials which oxidize. The gelation is caused by
the oxidative instability of the polymer at elevated
temperatures.

The present disclosure is directed to a polymer release
material of the type which oxidizes, wherein the gelation
problems are diminished and the oxidative stability of the
polymeric material is improved. The improvement comprises
suspending, blending or dissolving the moderately reactive
polymer release material of the type which oxidizes in a non-
reactive fluid. For example, polyethylene, polypropylene,
polybutylene, ethylene acrylic acid copolymer, alkyl silicone
polymers and other similar, moderately reactive polymer
release materials can be suspended in such non-reactive fluids
as silicone oil (polydimethyl siloxane), fluid fluorocarbons
such as perfluoro kerosine and other similar non-reactive
fluids.

Volume 3 Number 3 May/June 1978 159

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RELEASE AGENTS FOR FUSERS IN ELECTROSTATIC COPIERS (Cont~d)

The blend, suspension or solution of moderately reactive
polymer release materials of the type which oxidize, and the
non~reactive fluid can be used in the sump for containing a
release material similar to the sump described in U.S. Patent
3,937,637; or they can be applied to the surface of the fuser
member by brushes, by spraying, by metering, by application
from a wiper blade, by ap...