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NON-BLISTERING, THERMALLY CONDUCTING FUSER ROLL COATINGS

IP.com Disclosure Number: IPCOM000024244D
Original Publication Date: 1980-Feb-29
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 156K

Publishing Venue

Xerox Disclosure Journal

Abstract

This disclosure relates to laminated articles having a coating-of a copolymer of perfluoroalkyl perf luorovinyl ether and tetraf luoroethylene and more particularly, to laminated articles having a coating of the copolymer of perf luoroalkyl perfluorovinyl ether and tetrafluoroethylene upon a rough metal substrate as a base member. It is preferred to use a layer of the copolymer of approximately 1.0 - 1.5 mils upon the metal substrate. The use of a thickness of copolymer of about 1.0 - 1.5 mils in conjunction with a rough metal substrate eliminates or at least reduces the failure of the debonding of the copolymer from the metal substrate which forms "blisters" upon the surface.

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XEROX DISCLOSURE JOURNAL

NON-BLISTERING. THERMALLY ProDosed Classification

~OLL COATINGS U.S: Cl. 219/216

Int. C1. H05b 1/00

Albert E. Schreiber
Donald B. Smith
Edward Williams

This disclosure relates to laminated articles having a coating-of a copolymer of perfluoroalkyl perf luorovinyl ether and tetraf luoroethylene and more particularly, to laminated articles having a coating of the copolymer of perf luoroalkyl perfluorovinyl ether and tetrafluoroethylene upon a rough metal substrate as a base member. It is preferred to use a layer of the copolymer of approximately 1.0 - 1.5 mils upon the metal substrate. The use of a thickness of copolymer of about 1.0 -
1.5 mils in conjunction with a rough metal substrate eliminates or at least reduces the failure of the debonding of the copolymer from the metal substrate which forms "blisters" upon the surface.

Fuser rolls of the type normally used in electrophotographic copiers coated with less than 1 mil of a copolymer of perfluoroalkyl perfluorovinyl ether and tetraf luoroethylene frequently fail when used under operating conditions because of the formation of blisters upon the surface of the roll. Instead of wearing away uniformly at the track of the paper edge, areas of the copolymer of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene in the paper edge track debond from the metallic fuser roll substrate and then wear rapidly exposing the metal. Toner used in developing the electrophotographic image adheres to the metal and causes the copy quality defect known as "offset" on subsequent copies.

It has been determined that the probable cause of the blisters is the formation of stress-induced cracks in the copolymer of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene followed by penetration of the offset preventing fluid (fuser oil) into the copolymer/metal interface in the region of the crack in the film of copolymer. The offset preventing agent or release agent then causes the observed debonding of the copolymer film.

In accordance with the present disclosure, this problem may be eliminated or substantially reduced by strengthening the copolymer film by using a substrate that has been roughened in a specific way which results in attachment of the copolymer film of perfluoroalkyl perfluorovinyl ether and tetrafluoroethylene to the substrate in a substantially mechanical fashion that makes the film less susceptible to debonding by the penetration of the release agent because there is less likelihood of crack formation in the copolymer film. The problem may also be substantially reduced or eliminated by using a medium thickness (that is, about 1.0 - 1.5 mils) of the copolymer film of perf luoroalkyl perf luorovinyl ether and tetraf luoroethylene upon the substrate.

Volume 5 Number 1 January/February 1980 31

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NON-BLISTERING, THERMALLY CONDUCTING FUSER ROLL COATINGS (Cont'd)

When the surface is roughened,...