JPH0596658A - Elastic roller - Google Patents
Elastic rollerInfo
- Publication number
- JPH0596658A JPH0596658A JP26232291A JP26232291A JPH0596658A JP H0596658 A JPH0596658 A JP H0596658A JP 26232291 A JP26232291 A JP 26232291A JP 26232291 A JP26232291 A JP 26232291A JP H0596658 A JPH0596658 A JP H0596658A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- silicone rubber
- elastic
- siloxane
- low
- 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
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 34
- 239000004945 silicone rubber Substances 0.000 claims abstract description 34
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 abstract description 13
- 238000004073 vulcanization Methods 0.000 abstract description 9
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 41
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 7
- 239000005060 rubber Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- -1 polydimethylsiloxane Polymers 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007259 addition reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229920001774 Perfluoroether Polymers 0.000 description 1
- 239000004480 active ingredient Substances 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
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000013040 rubber vulcanization Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーザプリンタや電子
複写機等のローラに係わり、特にトナー定着部に使用さ
れるローラに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller for a laser printer, an electronic copying machine or the like, and more particularly to a roller used in a toner fixing section.
【０００２】[0002]
【従来の技術】従来から、電子複写機やレーザープリン
タの普及に伴い、機器の小型化、低加重化が図られ、そ
れに対応してこれらの機器のトナー定着部も小型化、低
硬度化が要求されている。トナー定着部は、内部にトナ
ーを溶融するヒータを設けた加熱ローラと、加熱ローラ
に通紙を押圧する加圧ローラとを備え、通紙上にトナー
の定着を行っている。これらの定着ローラは、熱伝導性
がよく、耐熱性であり通紙の安定性を図るため、ニップ
幅が確保されなければならず、単層のシリコーンゴムで
形成されたものでは通紙性、表面平滑性、耐久性の点で
満足のいくものが得られなかった。2. Description of the Related Art Conventionally, with the spread of electronic copying machines and laser printers, downsizing and weight reduction of equipment have been achieved. Correspondingly, the toner fixing portion of these equipments has also been downsized and low in hardness. Is required. The toner fixing unit is provided with a heating roller provided with a heater for melting the toner therein, and a pressure roller for pressing the sheet to the heating roller, and fixes the toner on the sheet. These fixing rollers have good thermal conductivity, heat resistance, and stability of paper passing, so a nip width must be secured, and a roller formed of a single layer of silicone rubber has a paper passing property, Satisfactory surface smoothness and durability were not obtained.
【０００３】そのため、芯金上に弾性体を形成し、その
上層に摩擦係数の小さいトナーとの離型性がよい最外層
を設けた多層構造のローラが用いられている。特に、弾
性体としてシリコーンゴムを用い、最外層にフッ素樹脂
層を設けたローラは適度な弾性を備え、高画質で熱応答
性がよいため、連続通紙時の定着性がよく、しかも耐久
性を備えているため多用されていた。Therefore, there is used a roller having a multi-layer structure in which an elastic body is formed on a cored bar, and an outermost layer having good releasability from a toner having a small friction coefficient is provided on the elastic body. In particular, the roller using silicone rubber as the elastic body and the fluororesin layer on the outermost layer has appropriate elasticity, high image quality and good thermal response, so it has good fixing properties during continuous paper feeding and is durable. It was used a lot because it was equipped with.
【０００４】多層構造のローラを作製するには、芯金に
シリコーンゴム、フッ素ゴム等を加硫、接着して弾性体
を形成した後、表面を研削し最外層にプライマーを介し
て、フッ素樹脂等のディスパージョンを塗装し、焼成し
てトナーとの離型性のよいフッ素樹脂層を形成する方法
もあった。しかしながら、フッ素樹脂等のディスパージ
ョン中にごみなどが混入しやすく、また、塗布後塗布液
が均一に塗布されるようローラを回転させなければなら
ず、時間を要し効率が悪かった。In order to manufacture a roller having a multi-layer structure, silicone rubber, fluororubber or the like is vulcanized and adhered to a core bar to form an elastic body, and then the surface is ground and a fluororesin is applied to the outermost layer through a primer. There is also a method of forming a fluororesin layer having good releasability from the toner by coating a dispersion such as the above and baking it. However, dust and the like are easily mixed in the dispersion of the fluororesin and the roller must be rotated so that the coating liquid can be uniformly applied after coating, which requires time and is inefficient.
【０００５】また、最外層としてチューブ等を用いて製
造する方法もあった。チューブを用いてローラを製造す
るには、芯金に弾性体を形成したものを熱収縮チューブ
に挿入し、弾性体と熱収縮チューブとを加熱接着し一体
化してローラを製造する。あるいは円筒金型を用い、円
筒金型の内側にチューブを添装させ、円筒金型の中心に
芯金を配置して芯金とチューブ間に液状ゴムを注入し、
金型ごと焼成加硫して製造する方法（特開平１−２１９
７８１号、特開平１−２７８３１５号、特開平１−２７
８３１６号公報）があった。There has also been a method of manufacturing using a tube or the like as the outermost layer. To manufacture a roller using a tube, a cored bar having an elastic body is inserted into a heat-shrinkable tube, and the elastic body and the heat-shrinkable tube are heat-bonded and integrated to manufacture a roller. Alternatively, using a cylindrical mold, a tube is attached to the inside of the cylindrical mold, a core metal is placed at the center of the cylinder mold, and liquid rubber is injected between the core metal and the tube,
A method of producing a mold by firing and vulcanization (Japanese Patent Laid-Open No. 1-219)
No. 781, JP-A 1-278315, and JP-A 1-27.
8316).
【０００６】[0006]
【発明が解決すべき課題】しかしながら、最外層にフッ
素樹脂チューブを用いて形成したローラは、電子複写機
等に搭載し複写を反復するうちに、チャージワイヤーに
汚れが生じ画像がでなかったり、外径が細り通紙性が悪
くなったりしてしまうことがあった。特に、ニップ幅を
確保するため弾性体層が厚い加圧ローラの場合、この外
径の細りが発生する傾向が著しかった。However, the roller formed by using the fluororesin tube as the outermost layer is not mounted on an electronic copying machine and the copying is repeated, so that the charge wire becomes dirty and an image is not formed. In some cases, the outer diameter was small and the paper-passing property was poor. In particular, in the case of a pressure roller having a thick elastic layer for ensuring the nip width, the thinning of the outer diameter tends to occur.
【０００７】ここでこのような何れの方法によっても製
造されるローラの弾性体層を形成するシリコーンゴム
は、（−Ｓi(ＣＨ3)2−Ｏ−）nで示されるポリジメチル
シロキサンが加硫されて網目構成を持つものであり、他
のゴムに比較して広い温度範囲でゴム弾性を有するもの
であるが、同時にその低分子量シロキサンを含有する。
このような、シロキサンは低分子量のもの程気化しやす
く、形成時の加熱により気化されるものであるが、シリ
コーンゴム中即ち弾性体層に残留する。[0007] Silicone rubber forming here elastic layer of roller produced by this one method, (- Si (CH 3) 2 -O-) polydimethylsiloxane vulcanization represented by n It has a network structure and has rubber elasticity in a wider temperature range as compared with other rubbers, but at the same time contains the low molecular weight siloxane.
Such a siloxane is more likely to be vaporized with a lower molecular weight and is vaporized by heating during formation, but remains in the silicone rubber, that is, the elastic layer.
【０００８】本発明者らは、弾性体層に低分子量シロキ
サンが残留する弾性ローラが電子複写機に搭載され、複
写のため加熱されると、残留するシロキサンが弾性体層
中から気化しローラの細りが生じて、チャージワイヤー
に汚れが生じ画像がでなかったり、外径が細り通紙性が
悪くなったりしてしまうことを発見した。本発明は、上
記欠点を解決するためになされたものであって、機器に
搭載され複写の加熱後であっても、ローラの外径の細り
が生じることなく、特に弾性体層の厚いローラにおいて
も最外層のフッ素樹脂層表層の平滑性が高く、良好なト
ナー定着が得られ、しかも耐久性を有する弾性ローラを
提供することを目的とする。The present inventors have found that when an elastic roller having a low-molecular-weight siloxane remaining on the elastic layer is mounted on an electronic copying machine and heated for copying, the residual siloxane is vaporized from the elastic layer and the roller. It was discovered that the thinning causes stains on the charge wire, resulting in poor images, and the thin outer diameter causes poor paper-passing properties. The present invention has been made in order to solve the above-mentioned drawbacks, and in particular, in a roller having a thick elastic layer, the outer diameter of the roller does not become thin even after being mounted on an apparatus and after heating for copying. Another object of the present invention is to provide an elastic roller in which the outermost surface of the fluororesin layer has high smoothness, good toner fixing can be obtained, and durability.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本発明の弾性ローラは、最外層と成るチューブと、
前記チューブに同軸状に挿入される芯金と、前記芯金及
び前記チューブ間に形成されるシリコーンゴムから成る
弾性体層とを備えた弾性ローラにおいて、前記シリコー
ンゴムは−（Ｓi(ＣＨ3)2−Ｏ）−n、（ｎ≦１２）で示
されるの低分子量シロキサンの含有量が０．０５重量パ
ーセント以下であり、且つ−（Ｓi(ＣＨ3)2−Ｏ）−n、
（１２＜ｎ≦２０）の低分子量シロキサンの含有量が
０．１０重量パーセント以下である。In order to achieve the above object, the elastic roller of the present invention comprises a tube which is the outermost layer,
A core metal that is inserted coaxially in the tube, the elastic roller having an elastic layer made of silicone rubber which is formed between the metal core and the tube, the silicone rubber is - (Si (CH 3) 2 -O) - n, (n ≦ 12 content of the low molecular weight siloxane represented by) is 0.05 weight% or less, and - (Si (CH 3) 2 -O) - n,
The content of (12 <n ≦ 20) low molecular weight siloxane is 0.10 weight percent or less.
【００１０】[0010]
【作用】弾性体層を形成するシリコーンゴムに含有され
る低分子量のシロキサンを除去する。そのためシリコー
ンゴムの弾性体層を有し、最外層としてチューブを用い
て形成されたローラを、複写機器に搭載して複写のため
に加熱された場合、シリコーンゴム加硫時に揮発しない
で残留する低分子量のシロキサン成分が殆ど存在しない
ため、シロキサンが気化するために生じる弾性体の細り
がなくなる。従って、通紙を反復してもローラの細りが
ない表層の平滑な弾性ローラが得られる。Function: The low molecular weight siloxane contained in the silicone rubber forming the elastic layer is removed. Therefore, when a roller that has an elastic layer of silicone rubber and is formed by using a tube as the outermost layer is mounted on a copying machine and heated for copying, it remains without volatilizing during silicone rubber vulcanization. Since there is almost no siloxane component having a molecular weight, thinning of the elastic body caused by vaporization of siloxane is eliminated. Therefore, it is possible to obtain an elastic roller having a smooth surface layer without thinning the roller even when the paper is repeatedly passed.
【００１１】[0011]
【実施例】本発明の弾性ローラを電子複写機の加圧ロー
ラに適用した一実施例を図面を参照して説明する。図１
に示すように、弾性ローラ１は、芯金２上に弾性体層３
と、最外層４とを有するものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the elastic roller of the present invention is applied to a pressure roller of an electronic copying machine will be described with reference to the drawings. Figure 1
As shown in FIG. 1, the elastic roller 1 includes an elastic layer 3 on a core metal 2.
And the outermost layer 4.
【００１２】芯金２は、熱伝導性がよく、しかも外周に
設けられる弾性体層４との接着がよい材質、例えば、
鉄、アルミニウム等から選択される。芯金２上に設けら
れる弾性体層３は、熱伝導性がよく、ニップ幅を確保で
きる弾力が得られる厚さのシリコーンゴムから形成され
る。さらに、弾性体層３の外周に設けられる最外層４
は、フッ素樹脂から成る。フッ素樹脂は耐熱性であり、
熱による劣化がなく摩擦係数が小さいため、トナーとの
離型性に優れている。そのため、加圧ローラの最外層と
して特に耐久性に優れた好ましいものである。フッ素樹
脂としては、パーフルオロアルコキシ樹脂（ＰＦＡ樹
脂）や、ポリテトラフルオロエチレン樹脂（ＰＴＦＥ樹
脂）が適用される。これらのフッ素樹脂は、チューブに
形成され、弾性ローラ１の最外層４を形成する。The cored bar 2 is made of a material having good thermal conductivity and good adhesion to the elastic layer 4 provided on the outer periphery, for example,
It is selected from iron, aluminum and the like. The elastic layer 3 provided on the cored bar 2 is formed of silicone rubber having a thickness that provides good thermal conductivity and elasticity that can secure the nip width. Further, the outermost layer 4 provided on the outer periphery of the elastic layer 3
Is made of fluororesin. Fluorine resin is heat resistant,
Since it is not deteriorated by heat and has a small friction coefficient, it has excellent releasability from toner. Therefore, it is preferable as the outermost layer of the pressure roller because of its excellent durability. As the fluororesin, a perfluoroalkoxy resin (PFA resin) or a polytetrafluoroethylene resin (PTFE resin) is applied. These fluororesins are formed into a tube and form the outermost layer 4 of the elastic roller 1.
【００１３】このような構成の弾性ローラ１を製造する
には、図２に示すような内壁面にチューブ４が添装され
る円筒金型５と、円筒金型５に挿入される芯金２を円筒
金型５と同軸状に挟持する１対の挟持体６及び７が設け
られた製造装置８を用いてもよい。芯金２にシリコーン
ゴムとの接着を促すプライマーを塗布し、未加硫のシリ
コーンゴムを巻き付けたものを、内壁面にチューブ４が
添装された円筒金型５に挿入し、加熱加硫して製造す
る。In order to manufacture the elastic roller 1 having such a structure, the cylindrical metal mold 5 having the tube 4 attached to the inner wall surface and the core metal 2 inserted into the cylindrical metal mold 5 as shown in FIG. You may use the manufacturing apparatus 8 provided with the pair of holding bodies 6 and 7 which hold | maintains a cylindrical mold 5 coaxially. A core 2 is coated with a primer that promotes adhesion with silicone rubber, and an unvulcanized silicone rubber is wrapped around the core 2 and inserted into a cylindrical mold 5 having a tube 4 attached to its inner wall surface, followed by heat vulcanization. To manufacture.
【００１４】あるいは、円筒金型５を挟持する挟持体７
の一方に射出装置（図示せず）に連結された液状ゴムの
射出口と嵌合するゴム注入口を備え、他方の挟持体８に
は一定圧以上の圧力が負荷されると弁が開き、内部の圧
力が調整される圧力調整弁が設けられた製造装置（図示
せず）を用い、常温で液状の縮含反応型シリコーンゴム
（ＲＴＶ）や、付加反応型シリコーンゴム（ＬＴＶ）等
の液状シリコーンゴムをチューブ４と芯金２間に注型し
て、加熱、加硫して芯金２の外周に弾性体層３を形成す
ると同時に、チューブ４と接着させて弾性ローラ１を製
造するようにしてもよい。Alternatively, a sandwiching body 7 for sandwiching the cylindrical mold 5
One side is provided with a rubber injection port that is fitted to an injection port of liquid rubber connected to an injection device (not shown), and the other holding body 8 is opened when a pressure higher than a certain pressure is applied, Using a manufacturing device (not shown) equipped with a pressure control valve that adjusts the internal pressure, liquid such as condensation reaction type silicone rubber (RTV) or addition reaction type silicone rubber (LTV) that is liquid at room temperature A silicone rubber is cast between the tube 4 and the core metal 2, heated and vulcanized to form the elastic layer 3 on the outer periphery of the core metal 2, and at the same time, bonded to the tube 4 to manufacture the elastic roller 1. You can
【００１５】また、単に芯金に未加硫の弾性体を設けた
ものをチューブに挿入してもよい。ここで弾性体に用い
られるシリコーンゴムは、（−Ｓi(ＣＨ3)2−Ｏ−）nで
示されるポリジメチルシロキサンが加硫されて網目構成
を持つものであり、他のゴムに比較して広い温度範囲で
ゴム弾性を有するものであるが、同時に−（Ｓi(ＣＨ3)
2−Ｏ）−nで示される低分子量シロキサンを含有する。
このような、シロキサンは低分子量のもの程気化しやす
く、形成時の加熱により気化されるものであるが、シリ
コーンゴム中即ち弾性体層に残留する。弾性体層中に残
留する低分子量シロキサンが複写時に加熱されて気化す
ることがローラの細りの起因となる。この複写時に生じ
るローラの細りを阻止する方法つまり弾性体層中に低分
子量シロキサンが残留しないようにする方法としては、
予め原料のシリコーンゴムに混在する低分子量シロキサ
ンを低量にして用いるか、またはシリコーンゴム加硫時
の加熱を調整する方法がある。Alternatively, a core bar provided with an unvulcanized elastic body may be inserted into the tube. Here silicone rubber used in the elastic body, (- Si (CH 3) 2 -O-) polydimethylsiloxane represented by n is vulcanized are those having a matrix configuration, as compared to other rubber but those having rubber elasticity in a wide temperature range, at the same time - (Si (CH 3)
It contains a low molecular weight siloxane represented by 2- O) -n .
Such a siloxane is more likely to be vaporized with a lower molecular weight and is vaporized by heating during formation, but remains in the silicone rubber, that is, the elastic layer. The low molecular weight siloxane remaining in the elastic layer is heated and vaporized during copying, which causes the roller to become thinner. As a method for preventing the roller from becoming thin during copying, that is, a method for preventing the low molecular weight siloxane from remaining in the elastic layer,
There is a method in which the low-molecular weight siloxane mixed in the raw material silicone rubber is used in advance in a low amount, or the heating during vulcanization of the silicone rubber is adjusted.
【００１６】原料のシリコーンゴムを選択する方法とし
ては、シリコーンゴム中に混在する低温で気化しやすい
低分子量のシロキサンを低量にする。特に、−（ＳiＨ2
−Ｏ）−nの３＜ｎ≦１２の低分子量シロキサンの含有
量を０．０５重量パーセント以下とし、且つ１２＜ｎ≦
２０のシロキサンの含有量を０．１０重量パーセント以
下とすることにより、ローラの細りの生じない弾性体層
３を得ることができる。 また、シリコーンゴムの加硫
加熱を調整する方法としては、２次加硫の加熱を低温で
長時間行い、シリコーンゴムの加硫加熱中に気化しやす
い低分子量のシロキサンを気化して蒸発させ、シリコー
ンゴムの有効成分のジチメルシロキサンの架橋度を高め
て硬化させる。加熱温度、加熱時間は弾性体層及び最外
層の厚さで異なる。適宜選択して行なう。As a method of selecting the raw material silicone rubber, the amount of low-molecular-weight siloxane, which is mixed in the silicone rubber and easily vaporized at a low temperature, is reduced. In particular,-(SiH 2
-O) -n content of 3 <n ≦ 12 low molecular weight siloxane is 0.05 weight% or less, and 12 <n ≦
By setting the siloxane content of 20 to 0.10 weight percent or less, the elastic layer 3 in which the roller is not thinned can be obtained. Further, as a method for adjusting the vulcanization heating of the silicone rubber, the secondary vulcanization heating is performed at a low temperature for a long time, and the low-molecular-weight siloxane that is easily vaporized during the vulcanization heating of the silicone rubber is vaporized and evaporated, It cures by increasing the degree of crosslinking of dithymer siloxane, which is an active ingredient of silicone rubber. The heating temperature and heating time differ depending on the thickness of the elastic layer and the outermost layer. Select appropriately and perform.
【００１７】〈実施例〉−（Ｓi(ＣＨ3)2−Ｏ）−nの３
＜ｎ≦１２の低分子量シロキサンの含有量が０．０５重
量パーセント以下、且つ１２＜ｎ≦２０のシロキサンの
含有量が０．１０重量パーセント以下の付加反応型シリ
コーンゴムを厚さ１０mmの弾性体層となるよう、厚さ３
０μmのチューブに注型し８０℃で２時間加熱し、弾性
ローラを得た。機器に搭載して通紙試験を行なったとこ
ろ、通紙枚数は１００万枚以上であった。[0017] <Example> - (Si (CH 3) 2 -O) - 3 of n
An addition-reaction type silicone rubber having a content of low molecular weight siloxane of <n ≦ 12 of 0.05% by weight or less and a content of siloxane of 12 <n ≦ 20 of 0.10% by weight or less is elastic body having a thickness of 10 mm. 3 layers, in layers
An elastic roller was obtained by casting in a 0 μm tube and heating at 80 ° C. for 2 hours. When it was mounted on the device and a paper passing test was conducted, the number of passed sheets was 1 million or more.
【００１８】比較例として、−（Ｓi(ＣＨ3)2−Ｏ）−n
の３＜ｎ≦１２の低分子量シロキサンの含有量が０．０
５重量パーセント以上、且つ１２＜ｎ≦２０の低分子量
シロキサンの含有量が０．１０重量パーセント以上のシ
リコーンゴムを用いて、同様の弾性ローラを作成し、機
器に搭載した。通紙枚数は５０万枚であった。[0018] As a comparative example, - (Si (CH 3) 2 -O) - n
Content of low molecular weight siloxane of 3 <n ≦ 12 is 0.0
A similar elastic roller was prepared using a silicone rubber having a content of low molecular weight siloxane of 5% by weight or more and 12 <n ≦ 20 of 0.10% by weight or more, and mounted on an apparatus. The number of sheets passed was 500,000.
【００１９】[0019]
【発明の効果】以上の説明からも明らかなように、本発
明の弾性ローラによれば、弾性体層を形成するシリコー
ンゴム中に含有される低分子量のシロキサンを予めシリ
コーンゴム中から除去するか、あるいは加硫中に気化し
てローラの両端から蒸発させるため、機器に搭載されて
加熱されても気化される低分子量シロキサンが残留しな
いため、ローラの細りが生じることなく、安定した通紙
が行なわれ良好なトナー定着がなされる弾性ローラを得
ることができる。As is clear from the above description, according to the elastic roller of the present invention, the low molecular weight siloxane contained in the silicone rubber forming the elastic layer is removed from the silicone rubber in advance. Or, since it vaporizes during the vulcanization and evaporates from both ends of the roller, the low molecular weight siloxane that is vaporized even if it is mounted on the equipment and heated does not remain, so the roller does not become thin and stable paper feeding is possible. It is possible to obtain an elastic roller that is subjected to good toner fixing.
【図１】本発明の弾性ローラの一実施例を示す断面図。FIG. 1 is a sectional view showing an embodiment of an elastic roller of the present invention.
【図２】図１に示す一実施例の製造装置を示す図。FIG. 2 is a diagram showing a manufacturing apparatus of the embodiment shown in FIG.
１…………弾性ローラ ２…………芯金 ３…………弾性体層 ４…………最外層（チューブ） 1 ………… Elastic roller 2 ………… Core bar 3 ………… Elastic body layer 4 ………… Outermost layer (tube)
Claims (1)
同軸状に挿入される芯金と、前記芯金及び前記チューブ
間に形成されるシリコーンゴムから成る弾性体層とを備
えた弾性ローラにおいて、前記シリコーンゴムは−（Ｓ
i(ＣＨ3)2−Ｏ）−n、（ｎ≦１２）で示されるの低分子
量シロキサンの含有量が０．０５重量パーセント以下で
あり、且つ−（Ｓi(ＣＨ3)2−Ｏ）−n、（１２＜ｎ≦２
０）の低分子量シロキサンの含有量が０．１０重量パー
セント以下であることを特徴とする弾性ローラ。1. An elastic roller comprising a tube as an outermost layer, a cored bar coaxially inserted into the tube, and an elastic layer made of silicone rubber formed between the cored bar and the tube. , The silicone rubber is-(S
i (CH 3) 2 -O) - n, ( is not less than 0.05 wt% content of the low molecular weight siloxane represented by n ≦ 12), and - (Si (CH 3) 2 -O) - n , (12 <n ≦ 2
An elastic roller characterized in that the content of the low molecular weight siloxane of 0) is 0.10% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26232291A JPH0596658A (en) | 1991-10-09 | 1991-10-09 | Elastic roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26232291A JPH0596658A (en) | 1991-10-09 | 1991-10-09 | Elastic roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0596658A true JPH0596658A (en) | 1993-04-20 |
Family
ID=17374164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26232291A Pending JPH0596658A (en) | 1991-10-09 | 1991-10-09 | Elastic roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0596658A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5698320A (en) * | 1994-08-08 | 1997-12-16 | Fujitsu Limited | Image forming device |
| JP4935947B1 (en) * | 2011-07-13 | 2012-05-23 | 富士ゼロックス株式会社 | Rubber roll manufacturing method |
| CN110133978A (en) * | 2018-02-09 | 2019-08-16 | 柯尼卡美能达株式会社 | The manufacturing method of silicone rubber compound, fixing member, fixing roller and fixing member |
-
1991
- 1991-10-09 JP JP26232291A patent/JPH0596658A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5698320A (en) * | 1994-08-08 | 1997-12-16 | Fujitsu Limited | Image forming device |
| JP4935947B1 (en) * | 2011-07-13 | 2012-05-23 | 富士ゼロックス株式会社 | Rubber roll manufacturing method |
| CN110133978A (en) * | 2018-02-09 | 2019-08-16 | 柯尼卡美能达株式会社 | The manufacturing method of silicone rubber compound, fixing member, fixing roller and fixing member |
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