EP0538347A1 - Rouleau de fixation dote d'un revetement - Google Patents

Rouleau de fixation dote d'un revetement

Info

Publication number
EP0538347A1
EP0538347A1 EP91912922A EP91912922A EP0538347A1 EP 0538347 A1 EP0538347 A1 EP 0538347A1 EP 91912922 A EP91912922 A EP 91912922A EP 91912922 A EP91912922 A EP 91912922A EP 0538347 A1 EP0538347 A1 EP 0538347A1
Authority
EP
European Patent Office
Prior art keywords
fixing roller
roller
flake
stainless steel
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91912922A
Other languages
German (de)
English (en)
Other versions
EP0538347A4 (en
Inventor
Akiyasu 2-17-27 Edaminami Midori-Ku Amita
Minori 1904-60 Shimosakunobe Hagiwara
Toshiaki 183-5 Kamiasami Asao-Ku Higaya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP0538347A1 publication Critical patent/EP0538347A1/fr
Publication of EP0538347A4 publication Critical patent/EP0538347A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
    • G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
    • G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
    • G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
    • G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof

Definitions

  • the present invention concerns a fixing roller used to thermally fix an unfixed toner image that has been formed on a transfer paper with an electronic photocopier or similar device.
  • an unfixed toner image that has been formed on a transfer paper is generally thermally fixed by means of a fixing apparatus that combines a fixing roller and pressure roller.
  • the fixing roller used here is ordinarily one in which the surface of a metal roller that houses a heater is covered with polytetrafluoroethylene (PTFE) or other such non-stick mold-releasing type of resin layer.
  • PTFE polytetrafluoroethylene
  • the thermal conductivity of the surface layer of this fixing roller is low (the thermal conductivity of the metal roller is 200 to 300 xlO 4 cal • cm" *1 • sec" 1 • deg -1 , while the thermal conductivity of the resin layer is only 2 to 8 xlO 4 cal • cm” 1 • sec -1 deg -1 )
  • a width of the nip formed between the fixing roller and the pressure roller had to be kept wide in order to attain the thermal efficiency needed for the desired fixing rate, and as a result, the nip pressure (the roller pressure used to form the nip) went up and the load torque increased, and this in turn led to accelerated deterioration of the parts of the appartus.
  • the present invention offers a fixing roller in which those above-mentioned problems inherent in prior art are eliminated, the fixing performance is enhanced by raising the thermal conductivity without decreasing the mold-releasing performance of the surface layer, and the load torque is reduced, thereby allowing the life of the parts to be extended.
  • the present invention provides a coated fixing roller in which the surface of a metal roller is covered with a non-stick mold-releasing type of resin layer, wherein said fixing roller is characterized by the fact that the above-mentioned resin layer contains a flake-form metal.
  • Figure 1 is one example of the fixing roller of the present invention.
  • Figure 2 is a detail of A in Figure 1.
  • Figure 3 is a graph showing the results of the fixing test performed in the practical examples.
  • 1 is a metal roller
  • 2 is a non-stick mold-releasing resin layer that contains a flake-form metal
  • 3 is a flake-form metal.
  • a is a conventional fixing roller
  • b is a fixing roller of the present invention, which contained 15% stainless steel flake in the coating
  • c is a fixing roller of the present invention, which contained 30% stainless steel flake in the coating.
  • FIG. 1 is the metal roller that makes up the core (in a pipe form) and 2 is the non-stick mold- releasing resin layer that contains flake-form metal. Although not depicted in the figure, a heater is housed in the metal roller 1.
  • Figure 2 shows a detail of A in Figure l.
  • 3 is the flake-form metal.
  • this flake-form metal should be positioned nearly parallel to the surface of the metal roller 1 as to be present as much as possible in the interior of the resin layer 2, as shown in Figure 2.
  • this flake-form metal examples include stainless steel, aluminum and alloys thereof, nickle, titanium, and silver, with stainless steel being particularly desirable. Alloys based on or containing at least 50% by weight of any of such metals may be used. Preferably the stainless steel contains 15-25% chromium, optionally also 7-16% nickel and further optionally 1.5-4% molybdenum. Compositions are given below. The content of the flake-form metal should be approximately 5 to 55 % with respect to the resin layer. Percentages herein are by weight except where indicated otherwise.
  • Types of stainless steel used with the invention include flakes of Japanese steel alloys SUS304, SUS430 and SUS316L.
  • the composition of the alloys are in Table I.
  • a conventional metal roller that houses a heater can be used without modification in the present invention.
  • Examples of the types of materials that can be used for this metal include aluminum and alloys thereof, iron, and copper.
  • either the surface of the metal roller is coated with a non-stick mold-releasing resin that has been blended with a flake-form metal, or this resin is made into a film and stuck onto the roller surface, or a resin layer is formed by means of thermal absorption.
  • a non-stick mold-releasing resin that has been blended with a flake-form metal
  • this resin is made into a film and stuck onto the roller surface, or a resin layer is formed by means of thermal absorption.
  • the viscosity of an undiluted solution of PTFE should be lowered slightly, the spray pressure raised to 4 kg/cm 2 (57 PSI) , and this solution sprayed on during the manufacture.
  • the thickness of this resin layer should be approximately 5 urn to 40 urn.
  • the fixing performance is enhanced without diminishing the mold-releasing performance of the surface.
  • the flake-form metal is positioned in the resin layer nearly parallel to the surface of the metal roller, an even better effect is achieved.
  • the present invention will now be described by giving practical examples.
  • the fixing roller of the present invention was created by covering the surface of a metal roller made from an aluminum alloy with a PFA resin layer containing flake-form stainless steel and with a thickness of 25 urn and the change in the fixing rate due to the surface temperature of the fixing roller was examined by conducting a fixing test. Two different stainless steel contents in the resin layer were produced - 15% and 30% (weight percent, the same for all further references) . Also, a test was performed for a conventional product produced in the same manner except that there was no stainless steel in the resin layer. These results are shown in Figure 1.
  • Curve a in the figure is the conventional product, which contained 0% stainless steel
  • Curves b and c are the products of the present invention, which contained 15% and 30% stainless steel respectively. It can be seen from this figure that the fixing rate of the fixing roller b of the present invention, which contained 15% stainless steel, and that of the fixing roller c of the present invention, which contained 30% stainless steel, were enhanced approximately 10% and approximately 30%, respectively, over that of the conventional fixing roller a, which did not contain stainless steel or other such metal.
  • the fixing roller of the present invention contains a flake-form metal in the surface resin layer, the thermal conductivity can be enhanced without diminishing the mold-releasing performance of the surface, and as a result, the fixing performance is enhanced, thereby eliminating the occurrence of offset and other related problems. This effect is particularly pronounced when the flake-form metal is positioned in the resin layer nearly parallel to the surface of the metal roller.
  • the nip width can be made narrower with the fixing roller of the present invention than with a coventional product, the nip pressure can be reduced, and as a result, the load torque can be decreased, thereby extending the life of the parts of the apparatus, among other benefits.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Rouleau de fixation reprographique dans lequel la surface métallique du rouleau (1) est recouverte d'un revêtement de polymère de perfluorocarbone non adhésif (2) contenant des flocons de métal (3).
EP19910912922 1990-07-09 1991-07-09 Coated fixing roller Withdrawn EP0538347A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP18093490A JPH0467187A (ja) 1990-07-09 1990-07-09 定着ローラ
JP180934/90 1990-07-09

Publications (2)

Publication Number Publication Date
EP0538347A1 true EP0538347A1 (fr) 1993-04-28
EP0538347A4 EP0538347A4 (en) 1993-09-15

Family

ID=16091833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910912922 Withdrawn EP0538347A4 (en) 1990-07-09 1991-07-09 Coated fixing roller

Country Status (3)

Country Link
EP (1) EP0538347A4 (fr)
JP (1) JPH0467187A (fr)
WO (1) WO1992000816A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5857950A (en) * 1996-11-06 1999-01-12 Pamarco Incorporated Fluid metering roll
JP4653452B2 (ja) 2003-10-24 2011-03-16 株式会社リコー 定着部材、定着装置、及び画像形成装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035362A1 (fr) * 1980-02-27 1981-09-09 Xerox Corporation Organe de fusion thermoconducteur

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3901700A (en) * 1973-05-17 1975-08-26 Eastman Kodak Co Repellent compositions of fluorinated polymers and oils in electrophotographic processes
US3975352A (en) * 1974-08-13 1976-08-17 Eastman Kodak Company Repellent compositions and elements containing the same
US4199626A (en) * 1975-09-10 1980-04-22 Eastman Kodak Company Electrographic fixing member and apparatus and process using same
US4248918A (en) * 1978-06-07 1981-02-03 Stauffer Chemical Company Pressure sensitive products and adhesive formulations
US4568275A (en) * 1981-11-25 1986-02-04 Canon Kabushiki Kaisha Fixing device and fixing rotary member therefor
US4541830A (en) * 1982-11-11 1985-09-17 Matsushita Electric Industrial Co., Ltd. Dye transfer sheets for heat-sensitive recording
US4554562A (en) * 1983-12-30 1985-11-19 International Business Machines Corporation Scratch resistant recording materials for electroerosion printing not requiring a lubricant overcoat
DE3884331T2 (de) * 1987-10-20 1994-01-20 Sumitomo Electric Industries Elastische Fixierwalze und Verfahren zu ihrer Herstellung.
US4935785A (en) * 1988-12-05 1990-06-19 Xerox Corporation Electrophotographic fuser roll and fusing process

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0035362A1 (fr) * 1980-02-27 1981-09-09 Xerox Corporation Organe de fusion thermoconducteur

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
See also references of WO9200816A1 *
XEROX DISCLOSURE JOURNAL, vol. 5, no. 2, March/April 1980, pages 163-164; P. DEPALMA et al.: "Improved thermal conductivity in laminated articles coated with fluorocarbon polymers" *

Also Published As

Publication number Publication date
EP0538347A4 (en) 1993-09-15
JPH0467187A (ja) 1992-03-03
WO1992000816A1 (fr) 1992-01-23

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