JPH04298778A - Fixing roller - Google Patents
Fixing rollerInfo
- Publication number
- JPH04298778A JPH04298778A JP436491A JP436491A JPH04298778A JP H04298778 A JPH04298778 A JP H04298778A JP 436491 A JP436491 A JP 436491A JP 436491 A JP436491 A JP 436491A JP H04298778 A JPH04298778 A JP H04298778A
- Authority
- JP
- Japan
- Prior art keywords
- conductive
- primer
- fluorinated hydrocarbon
- hydrocarbon resin
- glass fibers
- 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.)
- Pending
Links
- 239000003365 glass fiber Substances 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 abstract description 13
- 239000011347 resin Substances 0.000 abstract description 13
- 239000011231 conductive filler Substances 0.000 abstract description 6
- 239000000835 fiber Substances 0.000 abstract description 5
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 239000013032 Hydrocarbon resin Substances 0.000 abstract 6
- 229920006270 hydrocarbon resin Polymers 0.000 abstract 6
- 239000000945 filler Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 description 9
- 239000010408 film Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000006229 carbon black Substances 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は電子写真複写機の定着部
などに使用する定着ローラの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a fixing roller used in a fixing section of an electrophotographic copying machine.
【0002】0002
【従来の技術】一般に、電子写真複写機の定着部におい
ては、少なくとも一方に熱源の設置された1対のローラ
が設けられ、このローラ間を搬送紙が通過するときにト
ナー像が加熱加圧されて定着される方式が多用されてい
る。2. Description of the Related Art Generally, a fixing section of an electrophotographic copying machine is provided with a pair of rollers, at least one of which is equipped with a heat source, and when a conveyed paper passes between these rollers, a toner image is heated and pressurized. A method in which the image is fixed after being fixed is often used.
【0003】このような方式において使用される定着ロ
ーラに強く要求される特性は、オフセット現象を防止し
て定着画像を良好なものとすること、帯電防止性能を付
与して紙の巻付きを防止し連続通紙に耐えられるように
すること、そしてローラ外表面は連続使用に充分耐え得
る耐摩耗性を有すること、である。The characteristics strongly required of the fixing roller used in such a system are to prevent offset phenomenon to produce a good fixed image, and to provide antistatic performance to prevent paper from wrapping. The outer surface of the roller must have sufficient abrasion resistance to withstand continuous use.
【0004】これに対して、従来の定着ローラは、例え
ば、導電性カーボンを含有するポリテトラフルオロエチ
レン(PTFE)樹脂でローラ外表面を被覆したり(U
SP4179601号)、あるいは、芯軸上に導電性カ
ーボンを含有するプライマーを介してPTFE樹脂を被
覆する(特開昭57−150869号)といったものが
提案されている。しかしながら、前者はローラ外表面に
導電性カーボンを含有しているため、表面の体積抵抗値
は小さく帯電防止性能が良好である反面、離型性および
耐摩耗性が著しく低下するという欠点があった。また、
後者はローラ外表面がPTFE樹脂被覆であるので、離
型性が良好である反面、充分な導電性が得られず、また
前者と同様に耐摩耗性が低いという問題があった。On the other hand, conventional fixing rollers have, for example, coated the outer surface of the roller with polytetrafluoroethylene (PTFE) resin containing conductive carbon (U
SP4179601), or coating the core with PTFE resin via a primer containing conductive carbon (Japanese Patent Application Laid-Open No. 150869/1983) has been proposed. However, since the former contains conductive carbon on the outer surface of the roller, the surface volume resistivity is small and the antistatic performance is good, but it has the disadvantage that the mold release property and abrasion resistance are significantly reduced. . Also,
Since the outer surface of the roller is coated with PTFE resin, the latter has good mold releasability, but has problems in that sufficient conductivity cannot be obtained and, like the former, wear resistance is low.
【0005】そこで、外表面のPTFE樹脂において、
耐摩耗性と導電性を同時に向上させる目的で金属系の導
電性フィラーを配合するという方法も提案されている(
特公昭58−23626号)が、この構成のローラにお
いては、PTFE樹脂自体の有する優れた離型性が低下
してしまううえに導電性もさほど向上しない。このよう
に、従来のローラは、いづれも一長一短を有しており、
離型性、導電性、耐摩耗性の3つを同時に充分に満足す
るものはいまだ得られていなかった。[0005] Therefore, in the PTFE resin on the outer surface,
A method has also been proposed in which a metal-based conductive filler is added to improve wear resistance and conductivity at the same time (
Japanese Patent Publication No. 58-23626) discloses that in a roller having this structure, the excellent mold releasability of the PTFE resin itself deteriorates, and the conductivity does not improve much. In this way, conventional rollers all have advantages and disadvantages,
A material that satisfactorily satisfies the three requirements of mold releasability, electrical conductivity, and abrasion resistance has not yet been obtained.
【0006】[0006]
【発明が解決しようとする課題】以上の問題点に鑑みて
、本発明は、ローラ表面における離型性、導電性、耐摩
耗性の3つの特性を同時に充分満たすことにより、定着
画像が鮮明で連続通紙が可能な耐久性の良い定着ローラ
を提供することを目的とする。[Problems to be Solved by the Invention] In view of the above problems, the present invention aims to provide a clear fixed image by fully satisfying the three properties of releasability, conductivity, and abrasion resistance on the roller surface at the same time. The purpose of the present invention is to provide a durable fixing roller capable of continuous sheet feeding.
【0007】[0007]
【課題を解決するための手段】本発明は、金属芯軸上に
、導電性のプライマーを介して導電性弗素樹脂層を設け
、更にその上にガラス繊維を含有する弗素樹脂を塗布焼
成した離型性被膜を設けることを特徴とする定着ローラ
に関する。導電性のプライマーと導電性弗素樹脂層を積
層しているので充分な導電性が得られ、またガラス繊維
を含有する弗素樹脂の薄い被膜によって下層の導電性を
損なうこと無く、弗素樹脂の離型性を良好に保持しなが
ら耐摩耗性を大幅に向上させることができる。[Means for Solving the Problems] The present invention provides a conductive fluororesin layer on a metal core shaft via a conductive primer, and further coats and bakes a fluororesin containing glass fibers on the conductive fluororesin layer. The present invention relates to a fixing roller characterized by being provided with a moldable film. The conductive primer and conductive fluororesin layer are laminated to provide sufficient conductivity, and the thin coating of fluororesin containing glass fibers allows the fluororesin to be released from the mold without impairing the conductivity of the underlying layer. Abrasion resistance can be significantly improved while maintaining good properties.
【0008】導電性のプライマーとしては、弗素樹脂ベ
ースなどの汎用のプライマーに導電性充填剤(例えば導
電性カーボン)を適宜添加したものなどを使用できる。
導電性充填剤の添加量は、プライマーに対して5重量%
(固形分比)以下程度が望ましい。これ以上添加すると
プライマーとしての接着性能に支障を来す場合がある。
なお、金属芯軸上にプライマーを塗布するにあたり予め
金属芯軸表面を脱脂、洗浄した後サンドブラストなどに
より表面荒らし処理しておけばプライマーの接着力はよ
り向上する。また、プライマーの塗布厚さは、プライマ
ーの接着力や導電性の面から適宜設定すれば良く、数μ
m〜数十μmである。[0008] As the conductive primer, a general-purpose primer such as a fluororesin-based primer to which a conductive filler (eg, conductive carbon) is suitably added can be used. The amount of conductive filler added is 5% by weight based on the primer.
(Solid content ratio) The following is desirable. If more than this is added, the adhesion performance as a primer may be impaired. Note that, before applying the primer on the metal core shaft, if the surface of the metal core shaft is previously degreased and cleaned, and then roughened by sandblasting or the like, the adhesive force of the primer will be further improved. In addition, the coating thickness of the primer can be set appropriately from the viewpoint of adhesive strength and conductivity of the primer, and is several μm thick.
m to several tens of μm.
【0009】本発明においては、このような導電性のプ
ライマーを塗布し予備乾燥させたところへ導電性弗素樹
脂層を形成する。導電性充填剤としては、導電性カーボ
ン、金属繊維、あるいは導電性の二酸化錫、三酸化アン
チモン、チタン酸カリウムなどがあり、これらは適宜混
合して使用することができる。弗素樹脂としては、PT
FE樹脂のディスパージョンが好ましく、これに前記導
電性充填剤を添加分散したものを前記導電性プライマー
層の上に塗布または浸漬などの常法により被覆する。In the present invention, a conductive fluororesin layer is formed on the area where such a conductive primer is applied and pre-dried. Examples of the conductive filler include conductive carbon, metal fibers, conductive tin dioxide, antimony trioxide, and potassium titanate, and these can be used in an appropriate mixture. As a fluororesin, PT
A dispersion of FE resin is preferred, and the conductive filler is added and dispersed therein and coated on the conductive primer layer by a conventional method such as coating or dipping.
【0010】本発明においては、導電性弗素樹脂層の直
上にガラス繊維を含有する弗素樹脂を塗布焼成した離型
性被膜を設けることを特徴とする。導電性弗素樹脂層の
直上に設けるのは、その導電性能をローラ表層において
も出来るだけ損なわないようにうにするためである。従
って、この離型性被膜はその厚みがローラ導電性を大き
く左右するのであり、10μm以下、より好ましくは7
μm以下とするのが良い。[0010] The present invention is characterized in that a releasable film formed by applying and baking a fluororesin containing glass fibers is provided directly on the conductive fluororesin layer. The reason why it is provided directly above the conductive fluororesin layer is to prevent the conductive performance of the roller surface layer from being impaired as much as possible. Therefore, the thickness of this releasable film greatly affects the conductivity of the roller, and is preferably 10 μm or less, more preferably 7 μm or less.
It is preferable that the thickness be less than μm.
【0011】ガラス繊維の添加量は、離型性被膜の全重
量の1〜10重量%、より好ましくは1〜8重量%であ
る。10重量%より多いと得られるローラの表面状態の
低下が見られ、耐オフセット性が著しく悪くなるととも
に、耐摩耗性の向上もみられない。また、1重量%より
少ないと、耐摩耗性の効果が小さい。ガラス繊維の繊維
長は弗素樹脂に対する均一分散の点から20μm以下が
望ましい。The amount of glass fiber added is 1 to 10% by weight, more preferably 1 to 8% by weight, based on the total weight of the releasable coating. When the amount is more than 10% by weight, the surface condition of the resulting roller deteriorates, the offset resistance becomes significantly worse, and no improvement in abrasion resistance is observed. Moreover, if it is less than 1% by weight, the effect of wear resistance will be small. The fiber length of the glass fiber is preferably 20 μm or less from the viewpoint of uniform dispersion in the fluororesin.
【0012】また、弗素樹脂としては、PTFE樹脂の
他PFA樹脂などの公知の弗素樹脂を使用することがで
きるが、前述の通りこの離型性被膜は10μm以下の薄
膜とする必要があるため、ピンホールを生じ易く、ロー
ラ表面が均一にならないという場合がある。従ってピン
ホール発生防止の面から、融点が高く樹脂流動性の小さ
いPTFE樹脂を使用するのが特に望ましい。In addition, as the fluororesin, known fluororesins such as PTFE resin and PFA resin can be used, but as mentioned above, this releasable coating needs to be a thin film of 10 μm or less. Pinholes are likely to occur, and the roller surface may not be uniform. Therefore, from the viewpoint of preventing the occurrence of pinholes, it is particularly desirable to use PTFE resin, which has a high melting point and low resin fluidity.
【0013】なお、離型性被膜にはガラス繊維に、グラ
ファイト、二酸化チタン、チタン酸カリウムなどの繊維
を適宜併用することもできる。[0013]Fibers of graphite, titanium dioxide, potassium titanate, etc. may be used in combination with glass fibers as appropriate for the mold release coating.
【0014】[0014]
【実施例】本発明の実施例について説明する。(以下、
「重量%」とあるのはすべて固形分比を示す。)予め脱
脂、洗浄、サンドブラスト処理した外径40mmのアル
ミニウム芯軸上に、カーボンブラックを2重量%含有す
る弗素樹脂系プライマーを10μm厚さに塗布、乾燥し
た。この上にカーボンブラックを6重量%含有するPT
FE樹脂を塗布焼成して10μm厚さの導電性弗素樹脂
層を設け、さらにその上にガラス繊維(平均繊維長10
μm)を含有するPTFE樹脂を塗布焼成して3μm厚
さの離型性被膜を設けて本発明の定着ローラを製造した
。[Example] An example of the present invention will be described. (below,
All "% by weight" indicate solid content ratio. ) A fluororesin primer containing 2% by weight of carbon black was applied to a thickness of 10 μm on an aluminum core shaft with an outer diameter of 40 mm that had been previously degreased, washed, and sandblasted, and dried. PT containing 6% by weight of carbon black on top of this
A conductive fluororesin layer with a thickness of 10 μm is formed by applying and firing FE resin, and on top of that, glass fibers (average fiber length: 10 μm) are formed.
A fixing roller of the present invention was manufactured by applying and baking a PTFE resin containing 3 μm thick to form a releasable film having a thickness of 3 μm.
【0015】離型性被膜中のガラス繊維の配合量をそれ
ぞれ5,10,20,30重量%としたときの耐摩耗性
(4万枚通紙後の摩耗減量(mg))および耐オフセッ
ト性(最初のオフセット発生に至るまでの通紙枚数)を
調べたところ次のようであった。Abrasion resistance (abrasion loss (mg) after passing 40,000 sheets) and offset resistance when the amount of glass fiber in the release coating is 5, 10, 20, and 30% by weight, respectively. (Number of sheets passed until the first offset occurs) was investigated and found as follows.
【0016】
ガラス繊維量(重量%) 5
10 20 30◎ 摩耗減
量(mg) 21
17 20 33◎ 耐オ
フセット性(枚) 20万 8万
2万 1万◎また、離型性被膜の厚
みをそれぞれ3,7,10,13μmとしたときのロー
ラ表面における体積抵抗値(Ωcm)を測定したところ
次のようになった。なお、離型性被膜をまったく設けな
い場合の導電性弗素樹脂層表面の体積抵抗値は108.
4 Ωcmであった。Glass fiber amount (weight %) 5
10 20 30◎ Wear loss (mg) 21
17 20 33◎ Offset resistance (sheets) 200,000 80,000
20,100 ◎ Also, when the thickness of the releasable film was set to 3, 7, 10, and 13 μm, respectively, the volume resistivity (Ωcm) on the roller surface was measured, and the results were as follows. Note that the volume resistivity value of the surface of the conductive fluororesin layer when no releasable film is provided is 108.
It was 4 Ωcm.
【0017】
離型性被膜の厚み(μm) 3
7 10 13◎ 体
積抵抗値(Ωcm) 108.5 10
8.7 109.9 1014◎比較例
比較として、ガラス繊維の代わりにカーボンブラックを
5重量%配合した以外は実施例と同様にしてローラを製
造した。得られたローラの4万枚通紙後の摩耗減量は7
3mg、耐オフセット性は3万枚であった。Thickness of releasable film (μm) 3
7 10 13◎ Volume resistance value (Ωcm) 108.5 10
8.7 109.9 1014◎Comparative Example As a comparison, a roller was manufactured in the same manner as in the example except that 5% by weight of carbon black was blended instead of glass fiber. The wear loss of the obtained roller after passing 40,000 sheets was 7.
3 mg, and offset resistance was 30,000 sheets.
【0018】[0018]
【発明の効果】以上、本発明の定着ローラは、ローラ表
面における離型性、導電性、耐摩耗性の3つの特性を同
時に充分満たしており、定着画像が鮮明で大量の連続通
紙が可能で耐久性に優れる。[Effects of the Invention] As described above, the fixing roller of the present invention sufficiently satisfies the three properties of releasability, conductivity, and abrasion resistance on the roller surface at the same time, and the fixed image is clear and a large amount of paper can be passed continuously. It has excellent durability.
Claims (1)
て導電性弗素樹脂層を設け、更にその上にガラス繊維を
含有する弗素樹脂を塗布焼成した離型性被膜を設けるこ
とを特徴とする定着ローラ。Claim 1: A conductive fluororesin layer is provided on the metal core shaft via a conductive primer, and a releasable film is further provided on the layer by coating and baking a fluororesin containing glass fibers. A fixing roller.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP436491A JPH04298778A (en) | 1991-01-18 | 1991-01-18 | Fixing roller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP436491A JPH04298778A (en) | 1991-01-18 | 1991-01-18 | Fixing roller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04298778A true JPH04298778A (en) | 1992-10-22 |
Family
ID=11582326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP436491A Pending JPH04298778A (en) | 1991-01-18 | 1991-01-18 | Fixing roller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04298778A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6935994B2 (en) * | 1999-12-27 | 2005-08-30 | Nitto Kogyo Co., Ltd. | Fixing roller |
JP2008275927A (en) * | 2007-04-27 | 2008-11-13 | Fuji Xerox Co Ltd | Sliding member for fixing device, fixing device, and image forming apparatus |
JP2020124845A (en) * | 2019-02-04 | 2020-08-20 | 日本フッソ工業株式会社 | Coating film body containing high-purity graphene and method for manufacturing said coating film body |
-
1991
- 1991-01-18 JP JP436491A patent/JPH04298778A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6935994B2 (en) * | 1999-12-27 | 2005-08-30 | Nitto Kogyo Co., Ltd. | Fixing roller |
JP2008275927A (en) * | 2007-04-27 | 2008-11-13 | Fuji Xerox Co Ltd | Sliding member for fixing device, fixing device, and image forming apparatus |
JP2020124845A (en) * | 2019-02-04 | 2020-08-20 | 日本フッソ工業株式会社 | Coating film body containing high-purity graphene and method for manufacturing said coating film body |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5017432A (en) | Fuser member | |
US4596920A (en) | Heat roller fixing device | |
US5717988A (en) | Fixing rotor having an offset prevention layer containing a hollow double shell conductive substance | |
JPH1010841A (en) | System member capable of being electrified with electric bias | |
JPH0827572B2 (en) | Heat roller fixing device | |
US4434355A (en) | Offset prevention layer for heat roller fixing device | |
US6524760B1 (en) | Image receiving sheet and recording process | |
JPH04298778A (en) | Fixing roller | |
JP2002268423A (en) | Fixing belt and image forming device having the same | |
JPS5851264B2 (en) | heat fixing roller | |
JPS582864A (en) | Heat fixing roller | |
JPH0259468B2 (en) | ||
JPS59198118A (en) | Manufacture of heat fluidized fluorocarbon resin- covered cylindrical article | |
JP2004045916A (en) | Belt for intermediate transferring and fixing and its manufacturing method | |
JPS61153179A (en) | Production of roller coating with fluororesin | |
JPS58158670A (en) | Fixing roll of copying machine | |
JPH06348165A (en) | Fixing roller and fixing device | |
JPH0640234B2 (en) | Heat fixing roller | |
JP2714810B2 (en) | Rubber roll | |
JP3496853B2 (en) | Functional rolls placed around the photoreceptor | |
JPH0736097B2 (en) | Fixing roller for copier | |
JPS58134673A (en) | Heat roll fixing device | |
JP5242026B2 (en) | Conductive sheet for contact type charging / static charge | |
JP3289538B2 (en) | Development roll | |
JP3505951B2 (en) | Development roll |