JPH0646337B2 - Fixing roller - Google Patents
Fixing rollerInfo
- Publication number
- JPH0646337B2 JPH0646337B2 JP60297177A JP29717785A JPH0646337B2 JP H0646337 B2 JPH0646337 B2 JP H0646337B2 JP 60297177 A JP60297177 A JP 60297177A JP 29717785 A JP29717785 A JP 29717785A JP H0646337 B2 JPH0646337 B2 JP H0646337B2
- Authority
- JP
- Japan
- Prior art keywords
- silicone oil
- oil
- viscosity
- silicone rubber
- silicone
- 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.)
- Expired - Lifetime
Links
- 229920002545 silicone oil Polymers 0.000 claims description 40
- 229920002379 silicone rubber Polymers 0.000 claims description 26
- 239000004945 silicone rubber Substances 0.000 claims description 26
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 13
- 229920001971 elastomer Polymers 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 238000009826 distribution Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 229920001296 polysiloxane Polymers 0.000 description 4
- 230000037303 wrinkles Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000002902 bimodal effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000004971 Cross linker Substances 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000004989 laser desorption mass spectroscopy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 125000003396 thiol group Chemical class [H]S* 0.000 description 1
Classifications
-
- 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
- G03G15/206—Structural details or chemical composition of the pressure elements and layers thereof
Landscapes
- Coating Apparatus (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Description
【発明の詳細な説明】 「発明の利用分野」 この発明は、電子写真複写機、ファクシミリ等の静電記
録装置における加熱定着装置の定着ローラー、特に被覆
ゴム層にシリコーンオイルを含浸させた主として加圧ロ
ーラーとして使用するローラーに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Application of the Invention The present invention is mainly applied to a fixing roller of a heat fixing device in an electrostatic recording device such as an electrophotographic copying machine or a facsimile, and particularly to a coating rubber layer impregnated with silicone oil. The present invention relates to a roller used as a pressure roller.
「従来の技術、発明が解決せんとする問題点」 一般に電子写真複写機に用いる加熱定着装置において
は、加熱ローラーと加圧ローラーとの間に表面にトナー
を静電吸着した紙等の記録体を通過させることにより、
両ローラーからの熱及び圧力を受けて記録体にトナーを
加熱定着するようになっている。"Problems to be solved by conventional techniques and inventions" Generally, in a heat fixing device used in an electrophotographic copying machine, a recording material such as paper having a surface electrostatically adsorbed with toner between a heating roller and a pressure roller. By passing
The toner is heated and fixed on the recording medium by receiving heat and pressure from both rollers.
そして、この定着ローラーとして一般に耐熱性シリコー
ンゴムを被覆したローラーが使用されている。As the fixing roller, a roller coated with heat resistant silicone rubber is generally used.
一方、加熱定着装置においてはトナーなどの粘着性物質
が加熱ローラー表面に付着すること（オフセット現象）
を防止するために、一般にシリコーンオイルを離型剤と
して表面に塗付しているが、シリコーンオイルを塗付さ
れたシリコーンゴムの定着ローラーはトナーに対して充
分な離型性を有するものの、シリコーンオイルによって
シリコーンゴム層が膨潤してローラー外径寸法が大きく
変化したり、強度が低下し、更にはローラー芯金との接
着力も低下する欠点があり、その結果ローラー表面が凹
凸になって定着むらを生じたり、真円度を失なって記録
紙に皺、カール、曲がり送りを生じ、また芯金からのシ
リコーンゴムの剥離を生じるなどの種々の問題があっ
た。On the other hand, in heat fixing devices, sticky substances such as toner adhere to the surface of the heating roller (offset phenomenon)
To prevent this, silicone oil is generally applied to the surface as a release agent. Although the silicone rubber-fixing roller coated with silicone oil has sufficient releasability for toner, The silicone rubber layer swells due to oil, the outer diameter of the roller changes significantly, the strength decreases, and the adhesive strength with the roller core metal also decreases, resulting in uneven roller surface and uneven fixing. However, there are various problems such as the occurrence of wrinkles, the loss of roundness, wrinkles, curls, and curved feed on the recording paper, and the peeling of the silicone rubber from the core metal.
そこで最近では、このような問題を改善するためにシリ
コーンオイルを供給しない所謂オイルレス定着機構が使
用され、ローラーのシリコーンゴムに予め所要粘度の単
一種類のシリコーンオイルを添加含浸させておいて、使
用中にシリコーンオイルを徐々に滲出させることによ
り、トナーに対する離型性を保持させる方法が採られて
いる。Therefore, recently, in order to improve such a problem, a so-called oilless fixing mechanism that does not supply silicone oil is used, and the silicone rubber of the roller is previously impregnated with a single type of silicone oil having a required viscosity. A method has been adopted in which the releasability of the toner is maintained by gradually exuding silicone oil during use.
そして、この場合のシリコーンゴムとしては、熱加硫型
シリコーンゴム(HTV)、室温加硫型シリコーンゴム(RT
V)、付加型シリコーンゴム(LTV、LSR、LIMS)などが使用さ
れている。In this case, the silicone rubber may be heat-vulcanizable silicone rubber (HTV), room temperature vulcanizable silicone rubber (RT
V), addition type silicone rubber (LTV, LSR, LIMS), etc. are used.
しかしながら、これらのうち熱加硫型シリコーンゴムで
はそれ自体離型性が悪いことから、シリコーンオイルを
添加しても充分な離型性が得られず、また離型性の良好
な室温加硫型シリコーンゴムでは物理的強度が弱いた
め、通過する記録体の摩耗により定着ローラーとして充
分な寿命が得られないという問題があった。However, among these, the thermal vulcanization type silicone rubber itself has a poor releasability, so that even if silicone oil is added, sufficient releasability cannot be obtained, and a room temperature vulcanization type with good releasability is not obtained. Since silicone rubber has a weak physical strength, there is a problem that the fixing roller cannot have a sufficient life due to abrasion of the recording material passing therethrough.
また、強度、離型性の点で熱加硫型シリコーンゴムと室
温加硫型シリコーンゴムとの中間に位置する付加型シリ
コーンゴムにても、単一種類のシリコーンオイルを添加
しただけではその滲出速度をコントロールすることは困
難であった。In addition, even in the addition type silicone rubber which is located between the heat vulcanizing type silicone rubber and the room temperature vulcanizing type silicone rubber in terms of strength and releasability, exudation can be caused only by adding a single type of silicone oil. It was difficult to control the speed.
即ち、シリコーンオイルの粘度の低いものは、オイルの
滲出速度が早くて短期に外径収縮するため好ましくな
く、逆に粘度が高過ぎるものはオイルの滲出速度が遅く
て充分な離型性が得られないため好ましくない。That is, silicone oils with low viscosity are not preferable because the oil exudation speed is fast and the outer diameter shrinks in a short period of time. Conversely, silicone oils with too high viscosity have slow oil exudation speed and sufficient mold release properties are obtained. It is not preferable because it is not possible.
「問題点を解決するための手段」 この発明は前記従来の課題を解決するために、粘度が20
cs〜5000csのジメチルシリコーンオイルと、粘度が5000
cs〜60000csのジメチルシリコーンオイルとからなるそ
れぞれ粘度の高低異なる数種類のシリコーンオイルを、
付加型シリコーンゴム100重量部に対して１〜20重量部
配合した付加型シリコーンゴムからなるゴム層を芯金の
外周に被覆してなる定着ローラーを提案するものであ
る。"Means for Solving Problems" In order to solve the above-mentioned conventional problems, the present invention has a viscosity of 20%.
Dimethyl silicone oil with cs ~ 5000cs and viscosity of 5000
Several types of silicone oil with different viscosities, each consisting of cs-60000cs dimethyl silicone oil,
The present invention proposes a fixing roller in which a rubber layer composed of 1 to 20 parts by weight of 100 parts by weight of addition type silicone rubber is coated on the outer circumference of a core metal.
「作用」 付加型シリコーンゴム組成物に配合された数種類の粘度
が高低異なるジメチルシリコーンオイルは、粘度が低い
ものと高いものとではそれぞれ滲出速度が異なるため、
粘度の低いものは早く滲出し、また粘度の高いものは遅
く滲出することになる。"Action" Several types of dimethyl silicone oils having different viscosities mixed in the addition-type silicone rubber composition have different leaching speeds for low viscosity and high viscosity.
Those with low viscosity will exude quickly, and those with high viscosity will exude slowly.
その結果、シリコーンオイル全体として滲出速度をコン
トロールすることができ、これによって定着ローラーの
外径収縮を抑えつつ長期にわたって充分な離型性を保持
する。As a result, it is possible to control the exudation speed of the silicone oil as a whole, thereby suppressing the outer diameter shrinkage of the fixing roller and maintaining sufficient releasability for a long period of time.
「実施例、」 以下この発明を図面に示す実施例について説明すると、
定着ローラー１はその金属芯金２の外周に、粘度が20cs
〜5000csのジメチルシリコーンオイルと、粘度が5000cs
〜60000csのジメチルシリコーンオイルの内、粘度の高
低異なるものを数種類選んでそれぞれを付加型シリコー
ンゴム100重量部に対して１〜20重量部配合した付加型
シリコーンゴムからなるゴム層３を被覆することによっ
て形成されている。"Embodiment," Hereinafter, embodiments of the present invention shown in the drawings will be described.
The fixing roller 1 has a viscosity of 20cs on the outer periphery of the metal core 2.
~ 5000cs dimethyl silicone oil and viscosity is 5000cs
Among dimethyl silicone oils of up to 60,000 cs, select several types with different viscosities and coat them with a rubber layer 3 consisting of 1 to 20 parts by weight of addition type silicone rubber mixed with 100 parts by weight of addition type silicone rubber. Is formed by.
付加型シリコーンゴムは、常温で液状又はペースト状の
二液性のゴムになっており、これらを混合してこの混合
液を所定のモールドに注入し、室温放置又は所定の温度
に加熱することによりローラーに成形する。Addition type silicone rubber is a two-part rubber that is liquid or paste at room temperature. Mix these and pour this mixture into a specified mold, leave it at room temperature or heat it to a specified temperature. Mold into rollers.
この付加型シリコーンゴムとしては、例えばトーレシリ
コーン社製SE6706A/B等、離型性、耐久性、耐熱性等を
考慮した品質のものを使用する。As the addition-type silicone rubber, for example, SE6706A / B manufactured by Torre Silicone Co., Ltd. or the like having a quality in consideration of releasability, durability, heat resistance and the like is used.
ジメチルシリコーンオイルは、それぞれ粘度の高低異な
るものを数種類用意しておくか、または予め粘度の異な
るものを数種類ブレンドして一液として用意し、これら
を予め付加型シリコーンゴム素材に添加しておくか、或
いは付加型シリコーンゴムを混合する際に第三成分とし
て添加する。For dimethyl silicone oil, prepare several types with different viscosities, or blend several types with different viscosities in advance and prepare them as one liquid, and add these to the addition type silicone rubber material in advance. Alternatively, it is added as a third component when the addition type silicone rubber is mixed.
なお、上記ジメチルシリコーンオイルに加えてこれ以外
の変成シリコーンオイル、例えばフエニルシリコーンオ
イル、ふっ素変成シリコーンオイル、ポリエーテル変成
シリコーンオイル、エポキシ変成シリコーンオイル、メ
ルカプト変成シリコーンオイル、アルコール変成シリコ
ーンオイル、アルキル変成シリコーンオイル、アミノ変
成シリコーンオイル等を、離型性、耐久性、耐熱性等の
向上やオイルの滲出速度調整のために添加してもよい。In addition to the above dimethyl silicone oil, other modified silicone oils such as phenyl silicone oil, fluorine modified silicone oil, polyether modified silicone oil, epoxy modified silicone oil, mercapto modified silicone oil, alcohol modified silicone oil, and alkyl modified silicone oil. Silicone oil, amino-modified silicone oil, etc. may be added to improve mold release property, durability, heat resistance, etc., or to adjust oil leaching rate.
また、付加型シリコーンゴムに使用されるベースポリマ
ー、クロスリンカー、充填材等の種類や粘度によりシリ
コーンオイルの滲出速度が異なるため、これらとの適正
な組合せに配慮する必要がある。Further, since the exuding speed of the silicone oil varies depending on the type and viscosity of the base polymer, crosslinker, filler, etc. used for the addition type silicone rubber, it is necessary to consider proper combination with these.
実施例 付加型シリコーンゴムとしてトーレシリコーン社製SE67
06A/Bをベースに使用し、これに粘度の異なるジメチル
シリコーンオイルとして、トーレシリコーン社製SH200
(104cs)を５重量部、同SH200(102cs)を５重量部それぞ
れ添加して所要のローラーを成型した。Example SE67 manufactured by Toray Silicone Co., Ltd. as an addition type silicone rubber
SH200 manufactured by Torre Silicone Co., Ltd. using 06A / B as a base and using it as dimethyl silicone oil with different viscosities.
5 parts by weight of (10 4 cs) and 5 parts by weight of SH200 (10 2 cs) were added to form the required roller.
上記表１に示すように付加型シリコーンゴム（トーレSE
6706A/B）に単一粘度のジメチルシリコーンオイル（ト
ーレSH200）を添加して成型した各種ローラー（比較例
１〜３）と比較して各種実験をしたところ以下のような
結果を得た。 As shown in Table 1 above, addition type silicone rubber (Toray SE
6706A / B) was compared with various rollers (Comparative Examples 1 to 3) formed by adding dimethyl silicone oil (Toray SH200) having a single viscosity to various experiments, and the following results were obtained.
先ず、表１に示すように実施例と比較例１〜３におい
て、ジメチルシリコーンオイルの粘度が異なっても物理
的特性に変化がないことが分った。First, as shown in Table 1, in Examples and Comparative Examples 1 to 3, it was found that the physical properties did not change even if the dimethyl silicone oils had different viscosities.
次に、実施例と比較例１〜３におけるオイル抜け速度を
実験したところ、第２図に示す結果を得た。Next, an experiment was conducted on the oil escape rates in the examples and comparative examples 1 to 3, and the results shown in FIG. 2 were obtained.
即ち第２図において、比較例１（104sc）ではシリコー
ンオイルの粘度が高いため、オイルの抜け速度が遅く充
分な離型性が得られない結果となり、また逆に比較例３
（102cs）ではシリコーンオイルの粘度が低いため、オ
イルの抜け速度が速くローラーの外径収縮が顕著になっ
て紙皺やカールの発生が大きくなる。That is, in FIG. 2, in Comparative Example 1 (10 4 sc), since the viscosity of the silicone oil is high, the oil escape rate is slow and sufficient releasability cannot be obtained, and conversely Comparative Example 3
At (10 2 cs), since the viscosity of the silicone oil is low, the speed of oil escape is high, and the outer diameter contraction of the roller becomes noticeable, which causes wrinkles and curls to increase.
これに対して実施例（104cs＋102cs）では、これと類似
粘度の比較例２（103cs）と比べて所期においてオイル
抜けが抑えられており、その後徐々に適度なオイル抜け
が持続し、永続的な離型性と外径収縮が時間的に緩慢に
なることが分った。On the other hand, in Example (10 4 cs + 10 2 cs), oil leakage was suppressed at an expected level compared to Comparative Example 2 (10 3 cs) having a similar viscosity, and thereafter, moderate oil leakage gradually occurred. It was found that the sustained, permanent mold release and outer diameter contraction became slow in time.
また、実施例１と比較例２に使用したジメチルシリコー
ンオイルの分子量分布をＧＰＣで測定したところ、第３
図に示す結果を得た。The molecular weight distributions of the dimethyl silicone oils used in Example 1 and Comparative Example 2 were measured by GPC.
The results shown in the figure were obtained.
即ち第３図において、粘度（104cs＋102cs）の実施例の
ものでは、粘度（103cs）の比較例２に比べて分子量分
布が二峰性になっており、横に大きく広がっていること
が分る。That is, in FIG. 3, in the case of the example of viscosity (10 4 cs + 10 2 cs), the molecular weight distribution is bimodal as compared with Comparative example 2 of viscosity (10 3 cs), and spreads greatly in the lateral direction. I know that
従って、この分子量分布の相違がシリコーンオイルの滲
出速度に寄与していることから、本発明に用いる粘度の
高低異なるジメチルシリコーンオイルは、分子量分布が
二峰性になって適度なオイル抜けが長期間持続するよう
に、少なくとも相互に5000cs以上の粘度差を持っている
ことが望ましい。Therefore, since the difference in the molecular weight distribution contributes to the exudation rate of the silicone oil, the dimethylsilicone oil having different viscosities used in the present invention has a bimodal molecular weight distribution, and a suitable oil loss occurs for a long period of time. It is desirable to have a viscosity difference of at least 5000 cs with each other so as to last.
そして、上記実施例のローラーを複写機の定着ローラー
として実際に耐久試験を行ったところ、使用初期におい
て充分な離型性を有し、かつ20万枚耐久終了後も定着ム
ラ、紙皺、カール等の不具合の発生が全く見られなかっ
た。Then, when the roller of the above example was actually subjected to a durability test as a fixing roller of a copying machine, it had sufficient releasing property in the initial stage of use, and even after the endurance of 200,000 sheets, fixing unevenness, paper wrinkles, curl The occurrence of such problems as above was not seen at all.
第１図はこの発明の実施例を示す縦断面図、第２図は実
施例と比較例におけるオイルの抜け速度の関係を示す線
図、第３図は実施例と比較例におけるオイルの分子量分
布を示す線図である。 １……定着ローラー、２……芯金、 ３……ゴム層。FIG. 1 is a vertical cross-sectional view showing an embodiment of the present invention, FIG. 2 is a diagram showing a relationship of oil escape rates in the embodiment and the comparative example, and FIG. 3 is a molecular weight distribution of oil in the embodiment and the comparative example. FIG. 1 ... Fixing roller, 2 ... core metal, 3 ... rubber layer.
Claims (1)
オイルと、粘度が5000cs〜60000csのジメチルシリコー
ンオイルとからなるそれぞれ粘度が高低異なる数種類の
シリコーンオイルを、付加型シリコーンゴム100重量部
に対して１〜20重量部配合した付加型シリコーンゴムか
らなるゴム層を芯金の外周に被覆してなることを特徴と
する定着ローラー。1. Several kinds of silicone oil having different viscosities, each consisting of dimethyl silicone oil having a viscosity of 20 cs to 5000 cs and dimethyl silicone oil having a viscosity of 5000 cs to 60,000 cs, are added to 100 parts by weight of an addition type silicone rubber. A fixing roller characterized in that the outer periphery of a core metal is covered with a rubber layer made of an addition type silicone rubber mixed in an amount of up to 20 parts by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60297177A JPH0646337B2 (en) | 1985-12-26 | 1985-12-26 | Fixing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60297177A JPH0646337B2 (en) | 1985-12-26 | 1985-12-26 | Fixing roller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62153884A JPS62153884A (en) | 1987-07-08 |
| JPH0646337B2 true JPH0646337B2 (en) | 1994-06-15 |
Family
ID=17843173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60297177A Expired - Lifetime JPH0646337B2 (en) | 1985-12-26 | 1985-12-26 | Fixing roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0646337B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009053470A (en) * | 2007-08-28 | 2009-03-12 | Ricoh Co Ltd | Fixing device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS575071A (en) * | 1980-06-13 | 1982-01-11 | Showa Electric Wire & Cable Co Ltd | Production of nonelectrifiable roller |
| JPS57148778A (en) * | 1981-03-12 | 1982-09-14 | Nitto Kogyo Kk | Heat fixing roller for electronic copying machine |
-
1985
- 1985-12-26 JP JP60297177A patent/JPH0646337B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62153884A (en) | 1987-07-08 |
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