JPH01205188A - Fixing roller - Google Patents
Fixing rollerInfo
- Publication number
- JPH01205188A JPH01205188A JP2968988A JP2968988A JPH01205188A JP H01205188 A JPH01205188 A JP H01205188A JP 2968988 A JP2968988 A JP 2968988A JP 2968988 A JP2968988 A JP 2968988A JP H01205188 A JPH01205188 A JP H01205188A
- Authority
- JP
- Japan
- Prior art keywords
- rubber layer
- thickness
- fixing roller
- layer
- rubber
- 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
- 229920001971 elastomer Polymers 0.000 claims abstract description 63
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 23
- 239000004945 silicone rubber Substances 0.000 claims abstract description 23
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229920002545 silicone oil Polymers 0.000 abstract description 13
- 230000008961 swelling Effects 0.000 abstract description 8
- 230000000052 comparative effect Effects 0.000 description 10
- 239000007788 liquid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007774 longterm Effects 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 206010034960 Photophobia Diseases 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 208000013469 light sensitivity Diseases 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、電子写真複写機等の熱定着部を形成する加熱
定着ローラ及び加圧定着ローラ等の定着ローラ、特に、
カラー複写機のフルカラー用定着に適した定着ローラに
関する。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a fixing roller such as a heat fixing roller and a pressure fixing roller forming a heat fixing section of an electrophotographic copying machine, in particular,
The present invention relates to a fixing roller suitable for full-color fixing in a color copying machine.
［従来の技術］
近来、電子写真複写機において、カラー写真などの技術
が発達し、これに伴い定着ローラは画質重視の立場から
離型性の極めて優れたものが要求されている。離型性の
優れた定着ローうとしては、従来から定着ローラの最外
層を離型性の優れたシリコーンゴム等で形成し、その上
にシリコーン油などを塗布したものが知られている。し
かし、シリコーン油はシリコーンゴムになじみやすいの
で、シリコーン油はシリコーンゴム内部に浸透する。[Prior Art] Recently, in electrophotographic copying machines, technology such as color photography has been developed, and with this development, a fixing roller with extremely excellent mold releasability is required from the standpoint of placing emphasis on image quality. As a fixing roller with excellent mold releasability, it has been known that the outermost layer of the fixing roller is formed of silicone rubber or the like with excellent mold releasability, and silicone oil or the like is applied thereon. However, since silicone oil is easily compatible with silicone rubber, the silicone oil permeates inside the silicone rubber.
このため定着ローラは膨潤して、ゴム弾性体としての弾
性限界が低下したり、熱伝導率が低下する問題のばか、
定着ローラの径が変化して装置の他の部材との作動の周
期性にずれが生じ、紙シワ等の問題が発生する。As a result, the fixing roller swells, causing problems such as lowering its elastic limit as a rubber elastic body and lowering its thermal conductivity.
The diameter of the fixing roller changes, causing a shift in the periodicity of its operation with other members of the device, resulting in problems such as paper wrinkles.
上記定着ローラの膨潤に起因する問題点を解決するため
に、特′公昭５４−４１３３０号公報に、シリコーンゴ
ムで形成された定着ローラに中間層としてのフッ素変性
シリコーンゴム層を設けたものが報告されている。In order to solve the problems caused by the swelling of the fixing roller, Japanese Patent Publication No. 1983-41330 reports a fixing roller made of silicone rubber with a fluorine-modified silicone rubber layer as an intermediate layer. has been done.
［発明が解決しようとする課題］
耐油層としてフッ素変性シリコーンゴムからなる中間層
を設けた上記定着ローラにおいては、膨潤による紙シワ
の発生等の問題はある程度解決できたが、長期間使用に
よって最外層のシリコーンゴム層にクラックが生じると
いう新たな問題点が見い出された。[Problems to be Solved by the Invention] In the above-mentioned fixing roller in which an intermediate layer made of fluorine-modified silicone rubber is provided as an oil-resistant layer, problems such as paper wrinkles due to swelling can be solved to some extent, but after long-term use, A new problem was discovered in which cracks occur in the outer silicone rubber layer.
本発明は、上記問題に鑑み、長期間使用後においても最
外層のシリコーンゴム層にクラックが発生しない、耐久
性のある定着ローラを提供することを目的とする。SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a durable fixing roller that does not cause cracks in the outermost silicone rubber layer even after long-term use.
「課題を解決するための手段］
本発明の定着ローラは、芯金と、該芯金の表面を被覆し
かつシリコーンゴムからなる第１ゴム層と、該第１ゴム
層の表面を被覆しかつフッ素ゴムからなる第２ゴム層と
、該第２ゴム層の表面を被覆しかつシリコーンゴムから
なる第３ゴム層とから構成されるとともに、前記第２ゴ
ム層の肉厚を３０μｍ以上とし、かつ前記第３ゴム層の
肉厚を前記第２ゴム層の肉厚の９０％以下としたことを
特徴とするものである。"Means for Solving the Problems" The fixing roller of the present invention includes a core metal, a first rubber layer made of silicone rubber that covers the surface of the core metal, and a first rubber layer that covers the surface of the first rubber layer. Consisting of a second rubber layer made of fluororubber and a third rubber layer made of silicone rubber and covering the surface of the second rubber layer, the thickness of the second rubber layer is 30 μm or more, and The third rubber layer is characterized in that the thickness of the third rubber layer is 90% or less of the thickness of the second rubber layer.
上記第２ゴム層の肉厚としては、３０〜６０μｍの範囲
が好ましい。また、上記第３ゴム層の肉厚としては、１
０〜５０μｍの範囲が好ましい。The thickness of the second rubber layer is preferably in the range of 30 to 60 μm. Further, the thickness of the third rubber layer is 1
A range of 0 to 50 μm is preferred.
［作用］
本発明の定着ローラでは、第２ゴム層をフッ素ゴムで形
成するとともにその肉厚は３０μｍ以上と厚くし、かつ
シリコーンゴムからなる第３ゴム層の肉厚を第２ゴム膚
の肉厚の９０％以下としている。[Function] In the fixing roller of the present invention, the second rubber layer is formed of fluororubber, and its thickness is increased to 30 μm or more, and the thickness of the third rubber layer made of silicone rubber is set to be equal to the thickness of the second rubber layer. The thickness should be 90% or less.
なお一般に、定着ローラにシリコーン油が浸透して膨潤
が起こると、ローラの最外層ぐある第３層の表面部には
光感による圧縮力が働く。また、定着ローラの定着作動
時には、ローラの第３層内部に貯えられたシリコーン油
はローラ表面から複写紙に移動Ｊるため、第３層の表面
部には収縮力が働く。このように第３層の表面部では、
シリコーン油の出入りが起こり、これに起因して収縮・
圧縮が起こると思われる。そして長期間の使用により、
上記収縮・圧縮が繰り返され、第３層の表面部にクラッ
クが発生すると思われる。Generally, when the fixing roller is penetrated by silicone oil and swells, a compressive force due to light sensitivity acts on the surface of the third layer, which is the outermost layer of the roller. Furthermore, during the fixing operation of the fixing roller, the silicone oil stored inside the third layer of the roller moves from the roller surface to the copy paper, so that a shrinkage force acts on the surface of the third layer. In this way, at the surface of the third layer,
Silicone oil flows in and out, which causes shrinkage and
Compression is likely to occur. And with long-term use,
It is thought that the above shrinkage and compression are repeated and cracks occur on the surface of the third layer.
一方、前記したように本発明の定着ローラでは、第２ゴ
ム層はフッ素ゴムで形成されかつその肉厚が３０μｍ以
上と厚いため、第３ゴム層から浸透するシリコーン油は
、第２ゴム層でほぼ阻まれて第１ゴム層まで浸透するこ
とはない。また、たとえわずかなシリコーン油が第１ゴ
ム層に浸透して第１ゴム層が膨潤しても、第２ゴム層が
厚いため、第２ゴム層で第１ゴム層の膨潤をおさえるこ
とができ、第３ゴム層にまで歪みが及ぶことは少ない。On the other hand, as described above, in the fixing roller of the present invention, the second rubber layer is formed of fluororubber and has a thick wall thickness of 30 μm or more. It is almost blocked and does not penetrate into the first rubber layer. Furthermore, even if a small amount of silicone oil penetrates into the first rubber layer and causes the first rubber layer to swell, the second rubber layer is thick, so the second rubber layer cannot suppress the swelling of the first rubber layer. , distortion rarely extends to the third rubber layer.
さらに、第３ゴム層の肉厚が薄いため、シリコーン油の
出入りに起因する第３ゴム否の表面部と内部とのシリコ
ーン油の濃度分布とか膨潤の程度の差も少ない。このた
め第３ゴム層の表面部にクラックを発生させる引張り応
力が発生し難く、第３ゴム層でのクラックの発生は起こ
り難い。Furthermore, since the thickness of the third rubber layer is thin, there is little difference in the concentration distribution of silicone oil or the degree of swelling between the surface portion and the inside of the third rubber layer due to the ingress and egress of silicone oil. Therefore, tensile stress that would cause cracks to occur on the surface of the third rubber layer is less likely to occur, and cracks are less likely to occur in the third rubber layer.
［実施例１
（実施例１）
本実施例１では、図に示すように、芯金１として外径３
９ｍｍのアルミニウム製の筒状のものを用いた。なお、
芯金１の中空部１０１には加熱ヒータ１０２が配設され
ている。この芯金の表面にシリコーンゴム用ブライマー
を介して付加型シリコーンゴムを０．５ｍｍの肉厚で被
覆して第１ゴム層２を形成した。この第１ゴム層２の表
面にフッ素ゴム用！ライマーを介して液状フッ素ゴムを
３０μｍの肉厚で被覆して第２ゴム層３を形成した。[Example 1 (Example 1) In this example 1, as shown in the figure, the core bar 1 has an outer diameter of 3
A cylindrical tube made of 9 mm aluminum was used. In addition,
A heater 102 is provided in the hollow portion 101 of the core metal 1 . The first rubber layer 2 was formed by coating the surface of this core metal with an additive type silicone rubber with a thickness of 0.5 mm via a silicone rubber brimer. The surface of this first rubber layer 2 is for fluororubber! The second rubber layer 3 was formed by coating liquid fluororubber with a thickness of 30 μm via a primer.
さらに、この第２ゴム層３の表面に先に使用した付加型
シリコーンゴムを１０μｍの肉厚で被覆して第３ゴム層
４を形成した。次いで、このように芯金１に３層からな
るゴム層を形成した定着ローラを１５０℃で３０分間加
熱焼成して、本実施例１の定着ローラ１０を形成した。Furthermore, the third rubber layer 4 was formed by coating the surface of the second rubber layer 3 with the previously used addition-type silicone rubber to a thickness of 10 μm. Next, the fixing roller with three rubber layers formed on the core metal 1 was heated and baked at 150° C. for 30 minutes to form the fixing roller 10 of Example 1.
この定着ローラ１０に対して、トナーの離型性をより高
めるためのオイルとしてシリコーン油を用いる。For this fixing roller 10, silicone oil is used as oil to further improve the releasability of the toner.
このようにして得られた定着ローラ１０をミノシタ製粉
像転写式複写機ＥＰ−５３０Ｒｆｆに装着し、Ａ４サイ
ズ複写紙で５万枚のランニングを行なった。そして、最
外層におけるクラックの発生の程度を調べた。その結果
を表に示す。なお、表中○印は良好を示し、Δ印は使用
可の状態を示し、Ｘ印は使用不可の状態を示す。The fixing roller 10 thus obtained was installed in a Minoshita powder image transfer type copying machine EP-530Rff, and a run of 50,000 sheets of A4 size copy paper was performed. Then, the degree of crack generation in the outermost layer was examined. The results are shown in the table. In the table, ○ marks indicate good conditions, Δ marks indicate usable states, and X marks indicate unusable states.
表からもわかるように、本実施例１の定着ローラはクラ
ンクの発生がほとんど認められず、複写画像も良好であ
った。また、シリコーン油による膨潤等の問題もなかっ
た。As can be seen from the table, in the fixing roller of Example 1, almost no cranking was observed, and the copied images were also good. Further, there were no problems such as swelling due to silicone oil.
（実施例２）
本実施例２では、液状フッ素ゴムからなる第２ゴム層３
の肉厚を５０μｍとした以外は前記実施例１と同様に定
着ローラを作成した。(Example 2) In this Example 2, the second rubber layer 3 made of liquid fluororubber
A fixing roller was prepared in the same manner as in Example 1 except that the thickness of the roller was 50 μm.
そして、前記実施例１と同様にミノルタ製粉像転写複写
機ＥＰ−５３０ＲＩｒで５万枚のランニングを行なった
後、最外層におけるクラックの発生の程度を調べた。そ
の結果を表に示す。Then, in the same manner as in Example 1, after running 50,000 copies using the Minolta powder image transfer copying machine EP-530RIr, the degree of cracking in the outermost layer was examined. The results are shown in the table.
表からもわかるように、本実施例２の定着ローラでは、
クラックの発生がほとんど認められず、複写画像も良好
であった。また、シリコーン油による膨潤等の問題もな
かった。As can be seen from the table, the fixing roller of Example 2 has
Almost no cracks were observed, and the copied images were good. Further, there were no problems such as swelling due to silicone oil.
（比較例１） 上記実施例に対する比較例を以下に述べる。(Comparative example 1) A comparative example with respect to the above example will be described below.
本比較例１では、液状フッ素ゴムからなる８！Ｔ２ゴム
層３の肉厚を１０μｍとし、付加型シリコーンゴムから
なる第３ゴム層４の肉厚を７μｍとした以外は前記実施
例１と同様に定着ローラを作成し、前記実施例１と同様
の評価を行なった。その結果を表に示す。In Comparative Example 1, 8! made of liquid fluororubber! A fixing roller was prepared in the same manner as in Example 1, except that the thickness of the T2 rubber layer 3 was 10 μm, and the thickness of the third rubber layer 4 made of additive silicone rubber was 7 μm. We conducted an evaluation. The results are shown in the table.
表からもわかるように、本比較例１の定着ローラでは、
クラックが定着ローラ表面仝面にわたって発生した。ま
たこの影響により、ベタ部においてクラック模様が全面
に発生し、複写画像的にも悪質であった。As can be seen from the table, the fixing roller of Comparative Example 1:
Cracks occurred across the entire surface of the fixing roller. Moreover, due to this effect, a crack pattern was generated all over the solid area, and the reproduced image was also bad.
（比較例２）
本比較例２では、液状フッ素ゴムからなる第２ゴム層３
の肉厚を２０μｍとした以外は前記実施例１と同様に定
着ローラを作成し、前記実施例１と同様の評価を行なっ
た。その結果を表に示す。(Comparative Example 2) In Comparative Example 2, the second rubber layer 3 made of liquid fluororubber
A fixing roller was prepared in the same manner as in Example 1, except that the thickness of the roller was 20 μm, and the same evaluation as in Example 1 was performed. The results are shown in the table.
表からもわかるように、本比較例２の定着ローうでは、
クラックが定ｎｏ−ラ表面に若干発生した。またこの影
響により、ベタ部においてクラック模様が発生し、複写
画像的にも良いものではなかった。As can be seen from the table, in the fixing row of Comparative Example 2,
Some cracks were generated on the surface of the constant no. Furthermore, due to this effect, crack patterns were generated in the solid areas, and the reproduced image was also not good.
（比較例３）
本比較例３では、液状フッ素ゴムからなる第２ゴム層３
の肉厚を３０μｍとし、付加型シリコーンゴムからなる
第３ゴム層４の肉厚を３０μｍとした以外は＊ｊＦＩ記
実施例１と同様に定着ローラを作成し、前記実施例１と
同様の評価を行なった。その結果を表に示す。(Comparative Example 3) In Comparative Example 3, the second rubber layer 3 made of liquid fluororubber
A fixing roller was prepared in the same manner as in Example 1, except that the thickness of the third rubber layer 4 made of additive silicone rubber was 30 μm, and the same evaluation as in Example 1 was performed. I did it. The results are shown in the table.
表からもわかるように、本比較例３の定着ローラでは、
クラックが定着ローラ表面に極くゎずが発生した。また
この影響により、ベタ部において゛クラック模様が若干
発生し、複写画像的にもあまり良いものではなかった。As can be seen from the table, the fixing roller of Comparative Example 3:
Very small cracks appeared on the surface of the fixing roller. Furthermore, due to this effect, a slight crack pattern was generated in the solid area, and the reproduced image was not very good.
［効宋コ
本発明の定着ローラによれば、長期間使用後においても
、ローラの最外層を形成するシリコーンゴム層にクラッ
クが゛発生することはなく、複写画像も良好となる。ま
た、定着ローラの膨潤等の問題もない。従って、複写作
動を長期間にわたって良好に行うことができる。[Effects] According to the fixing roller of the present invention, even after long-term use, cracks do not occur in the silicone rubber layer forming the outermost layer of the roller, and the copied images are also good. Further, there is no problem such as swelling of the fixing roller. Therefore, copying operations can be performed satisfactorily over a long period of time.
図は本実施例の定着ローラの断面図である。
１・・・芯金 ２・・・第１ゴム層３・・・第
２ゴム［４・・・第３ゴム層１０・・・定着ローラThe figure is a sectional view of the fixing roller of this embodiment. 1... Core metal 2... First rubber layer 3... Second rubber [4... Third rubber layer 10... Fixing roller
Claims (2)
ゴム層と、 該第１ゴム層の表面を被覆しかつフッ素ゴムからなる第
２ゴム層と、 該第２ゴム層の表面を被覆しかつシリコーンゴムからな
る第３ゴム層とから構成されるとともに、前記第２ゴム
層の肉厚を３０μｍ以上とし、かつ前記第３ゴム層の肉
厚を前記第２ゴム層の肉厚の９０％以下としたことを特
徴とする定着ローラ。(1) A core metal, and a first layer made of silicone rubber and covering the surface of the core metal.
A rubber layer, a second rubber layer that covers the surface of the first rubber layer and is made of fluororubber, and a third rubber layer that covers the surface of the second rubber layer and is made of silicone rubber. A fixing roller, wherein the second rubber layer has a thickness of 30 μm or more, and the third rubber layer has a thickness of 90% or less of the thickness of the second rubber layer.
前記第３ゴム層の肉厚は１０〜５０μｍであることを特
徴とする特許請求の範囲第１項記載の定着ローラ。(2) The thickness of the second rubber layer is 30 to 60 μm,
2. The fixing roller according to claim 1, wherein the third rubber layer has a thickness of 10 to 50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2968988A JPH01205188A (en) | 1988-02-10 | 1988-02-10 | Fixing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2968988A JPH01205188A (en) | 1988-02-10 | 1988-02-10 | Fixing roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01205188A true JPH01205188A (en) | 1989-08-17 |
Family
ID=12283075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2968988A Pending JPH01205188A (en) | 1988-02-10 | 1988-02-10 | Fixing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01205188A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0541763U (en) * | 1991-11-13 | 1993-06-08 | 旭化成工業株式会社 | Heat resistant pressure bonding roll |
| US5232499A (en) * | 1990-10-01 | 1993-08-03 | W. L. Gore & Associates, Inc. | Fluid metering and coating device |
| US5779795A (en) * | 1995-08-04 | 1998-07-14 | W. L. Gore & Associates, Inc. | Low surface energy fluid metering and coating device |
-
1988
- 1988-02-10 JP JP2968988A patent/JPH01205188A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5232499A (en) * | 1990-10-01 | 1993-08-03 | W. L. Gore & Associates, Inc. | Fluid metering and coating device |
| JPH0541763U (en) * | 1991-11-13 | 1993-06-08 | 旭化成工業株式会社 | Heat resistant pressure bonding roll |
| US5779795A (en) * | 1995-08-04 | 1998-07-14 | W. L. Gore & Associates, Inc. | Low surface energy fluid metering and coating device |
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