JP2003015454A - Fixing roll - Google Patents
Fixing rollInfo
- Publication number
- JP2003015454A JP2003015454A JP2001202963A JP2001202963A JP2003015454A JP 2003015454 A JP2003015454 A JP 2003015454A JP 2001202963 A JP2001202963 A JP 2001202963A JP 2001202963 A JP2001202963 A JP 2001202963A JP 2003015454 A JP2003015454 A JP 2003015454A
- Authority
- JP
- Japan
- Prior art keywords
- fixing roller
- sleeve
- rubber layer
- core shaft
- elastic 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 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 11
- 239000004945 silicone rubber Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 abstract description 20
- 239000002344 surface layer Substances 0.000 abstract description 10
- 230000006866 deterioration Effects 0.000 abstract description 9
- 239000011347 resin Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000004381 surface treatment Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000007259 addition reaction Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- -1 perfluoroalkyl vinyl ether Chemical compound 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
【発明の属する技術分野】本発明は、表層にフッ素樹脂
チューブを有し、電子写真複写機やプリンタなどの熱定
着部に使用される定着ローラに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller which has a fluororesin tube on its surface and is used in a heat fixing section of an electrophotographic copying machine or printer.
【従来の技術】電子写真複写機やプリンタなどの熱定着
部においては、画像形成プロセスにより、加熱溶融性の
樹脂などからなるトナーの画像を記録紙上に形成し、こ
の記録紙を、加熱ヒータを内蔵した定着ローラと加圧ロ
ーラの２つのローラ間に通すことにより定着させる熱定
着方式が一般に採用されている。上記定着ローラは、芯
軸の周面上に、耐熱性を満たすためにシリコーンゴムに
よる弾性ゴム層を設け、さらに表層として、トナーとの
離型性のよいＰＦＡ（テトラフルオロエチレン・パーフ
ルオロアルキルビニルエーテル共重合体）によるフッ素
樹脂スリーブを被せてなるものが多用されている。定着
ローラに使用されるフッ素樹脂スリーブは、製造時、管
状体に押出成形された後、次の各工程に移動する際に、
複数箇所において対向配置された２つの押付けロール等
で挟み付けられテープ状にされて走行され、最終段階で
ローラ表層として円形にされる。2. Description of the Related Art In a heat fixing section of an electrophotographic copying machine, a printer or the like, an image of a toner made of a heat-fusible resin or the like is formed on a recording paper by an image forming process, and the recording paper is heated by a heater. A thermal fixing method is generally adopted in which fixing is carried out by passing the roller between a built-in fixing roller and a pressure roller. In the fixing roller, an elastic rubber layer made of silicone rubber is provided on the peripheral surface of the core shaft so as to satisfy heat resistance, and as a surface layer, PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether) having good releasability from the toner. The thing which covers the fluororesin sleeve by a copolymer) is often used. The fluororesin sleeve used for the fixing roller is extruded into a tubular body at the time of manufacturing and then moved to the next step,
It is sandwiched by two pressing rolls or the like that are arranged opposite to each other at a plurality of locations, formed into a tape shape, and run, and at the final stage, it is formed into a circular shape as a roller surface layer.
【発明が解決しようとする課題】このため、フッ素樹脂
スリーブは最終的に円形とされても、ロール等で押圧さ
れてテープ状とされた状態での両端部に、長さ方向にそ
って発生した折り目が残存する。しかも、これらの折り
目の外面頂部に、図２に示されるように塑性変形した深
さ５μｍ程度の微小な凹み１０が生じている。このよう
な凹み１０を有するフッ素樹脂スリーブを表層として被
せた定着ローラを複写機等に取り付けられて使用した場
合、凹み内部にトナーが溜まって記録紙に形成された画
像に繊細ながらもすじ状模様が生じ、画質を低下させる
要因となっている。本発明は、表層のフッ素樹脂スリー
ブに存在する折り目の凹みによる画質低下を防止した定
着ローラを提供することを目的とするものである。Therefore, even if the fluororesin sleeve is finally formed into a circular shape, it is generated along the lengthwise direction at both ends in the state of being pressed into a tape shape by a roll or the like. The folds that have been made remain. In addition, as shown in FIG. 2, a minute recess 10 having a depth of about 5 μm that is plastically deformed is formed at the top of the outer surface of these folds. When a fixing roller covered with a fluororesin sleeve having such a recess 10 as a surface layer is used by being attached to a copying machine or the like, toner is accumulated inside the recess and a fine but streaky pattern is formed on the image formed on the recording paper. Occurs, which is a factor that deteriorates the image quality. SUMMARY OF THE INVENTION It is an object of the present invention to provide a fixing roller that prevents deterioration of image quality due to dents in folds existing in the surface fluororesin sleeve.
【課題を解決するための手段】上記目的を達成するため
に、本発明者らは鋭意検討を重ねた結果、上記凹みを完
全に除去することは製作コスト上の問題もあって困難で
あるが、凹みを除去し得なくとも、フッ素樹脂スリーブ
の表面処理を行って凹みの深さを所定値以下とすること
により、実質的に画像低下を防止できることを見出し、
本発明を完成した。すなわち、本発明は、芯軸と、前記
芯軸周面上に設けられた弾性ゴム層と、前記弾性ゴム層
を覆う表層のフッ素樹脂スリーブとを備えた定着ローラ
において、前記フッ素樹脂スリーブの外表面に存在する
折り目頂部の凹みの深さを、０．５〜３．０μｍの範囲
としたことを特徴とする。上記構成の定着ローラにおい
ては、弾性ゴム層を覆う表層のフッ素樹脂スリーブの外
表面に存在する折り目頂部の凹みの深さ（Ｈ）を、０．
５〜３μｍの範囲としたことにより、凹みへのトナーの
溜まりが極端に減少し、実質的に画像低下を防止し得
る。なお、折り目頂部の凹みの深さ（Ｈ）を０．５〜
３．０μｍの範囲に限定したのは、Ｈを０．５μｍ未満
とするフッ素樹脂スリーブは適正コストを考慮すると製
造がきわめて困難であり、またＨが３μｍを越えるフッ
素樹脂スリーブを使用した定着ローラは本発明による作
用効果が得られないからである。本発明において、前記
弾性ゴム層は、シリコーンゴムからなり、肉厚が０．０
７〜７．５ｍｍであることが好ましく、また、前記フッ
素樹脂スリーブは、肉厚が３０〜１００μｍのＰＦＡス
リーブであることが好ましい。In order to achieve the above object, the inventors of the present invention have conducted extensive studies, and as a result, it is difficult to completely remove the above-mentioned dents due to manufacturing cost problems. However, even if it is not possible to remove the recess, by finding that the depth of the recess is less than a predetermined value by performing the surface treatment of the fluororesin sleeve, it is possible to substantially prevent image deterioration,
The present invention has been completed. That is, the present invention provides a fixing roller comprising a core shaft, an elastic rubber layer provided on the peripheral surface of the core shaft, and a surface fluororesin sleeve covering the elastic rubber layer. It is characterized in that the depth of the depression at the top of the fold existing on the surface is in the range of 0.5 to 3.0 μm. In the fixing roller having the above structure, the depth (H) of the depression at the top of the fold existing on the outer surface of the fluororesin sleeve that covers the elastic rubber layer is 0.
By setting the thickness in the range of 5 to 3 μm, the amount of toner accumulated in the recess is extremely reduced, and the deterioration of the image can be substantially prevented. In addition, the depth (H) of the depression at the top of the fold is 0.5 to
The reason for limiting the range to 3.0 μm is that it is extremely difficult to manufacture a fluororesin sleeve with H less than 0.5 μm in view of proper cost, and a fixing roller using a fluororesin sleeve with H exceeding 3 μm is used. This is because the effects of the present invention cannot be obtained. In the present invention, the elastic rubber layer is made of silicone rubber and has a thickness of 0.0
The thickness is preferably 7 to 7.5 mm, and the fluororesin sleeve is preferably a PFA sleeve having a wall thickness of 30 to 100 μm.
【発明の実施の形態】以下、本発明の定着ローラにおけ
る実施の形態を図面を参照して説明する。図１は本発明
の一実施例を示し、図２は図１Ａ部を拡大して示してい
る。図において、１１は定着ローラであり、鉄、ステン
レス、アルミニウム等の金属製の芯軸１２上に、耐熱性
の良好な弾性ゴム層１３とフッ素樹脂スリーブ１４とを
順次同軸的に被覆してなるものである。弾性ゴム層１３
は、付加反応型シリコーンゴムにより肉厚０．０７〜
７．５ｍｍに形成され、フッ素樹脂スリーブ１４は、Ｐ
ＦＡにより肉厚３０〜１００μｍに形成されている。図
２に示すように折り目頂部の凹み１０の深さ（Ｈ）は、
フッ素樹脂スリーブ１４の表面処理を行うことにより、
０．５〜３．０μｍの範囲とされている。芯軸１２はパ
イプ状に形成されている。図示を省略したが、芯軸１２
の中空内には、加熱ヒータ等の熱源が挿設される。
[実施例]ＰＦＡを押出工程にて、押付けロール間荷重を
低荷重で外径４１ｍｍ、厚さ０．０５ｍｍの管状体を成
形すると共に、表面処理を行って、押出工程時に生じた
折り目頂部の凹みの深さ（Ｈ）を２μｍとしたＰＦＡス
リーブを成形した。このＰＦＡスリーブを、常法により
有底円筒状の金型の内壁にそって配置し、接着剤を塗
布、乾燥した後、同様に、外面に接着剤を塗布、乾燥し
た、外径４０ｍｍ、内径３４ｍｍの芯軸を同金型内に同
軸的に配置し、芯軸とスリーブとの間に、硬度２５度
（デュロメータＡ）のシリコーンゴムを注入し、１８０
℃、２０分間で加硫を行って、ＰＦＡスリーブを表層と
する、外径４５ｍｍ、ゴム層肉厚２．５ｍｍの定着ロー
ラを得た。得られた定着ローラを、電子写真複写機に取
り付けて使用した際の記録紙に形成されたトナー画像の
評価試験（すじ状模様の有無を目視で確認する検査）を
行ったところ、記録紙に形成されたトナー画像にはすじ
状模様がほとんど認められなかった。なお、ＰＦＡスリ
ーブの折り目頂部の凹みの深さは、周知の接触式表面粗
さ計で測定した。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a fixing roller of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows an enlarged portion of FIG. 1A. In the figure, reference numeral 11 denotes a fixing roller, which comprises a metal core shaft 12 made of iron, stainless steel, aluminum or the like, on which an elastic rubber layer 13 having good heat resistance and a fluororesin sleeve 14 are sequentially coaxially coated. It is a thing. Elastic rubber layer 13
Is made of addition reaction type silicone rubber with a wall thickness of 0.07-
The fluororesin sleeve 14 is formed to 7.5 mm
It is formed with FA to a thickness of 30 to 100 μm. As shown in FIG. 2, the depth (H) of the recess 10 at the top of the fold is
By performing the surface treatment of the fluororesin sleeve 14,
The range is 0.5 to 3.0 μm. The core shaft 12 is formed in a pipe shape. Although not shown, the core shaft 12
A heat source such as a heater is inserted in the hollow. [Example] In the extrusion process of PFA, a tubular body having an outer diameter of 41 mm and a thickness of 0.05 mm was formed with a low load between pressing rolls, and a surface treatment was performed so that the crease top portion generated during the extrusion process was A PFA sleeve having a recess depth (H) of 2 μm was molded. This PFA sleeve was placed along the inner wall of a bottomed cylindrical mold by a conventional method, and after the adhesive was applied and dried, the adhesive was similarly applied to the outer surface and dried. Outer diameter 40 mm, inner diameter A 34 mm core shaft is coaxially arranged in the same mold, and silicone rubber having a hardness of 25 degrees (durometer A) is injected between the core shaft and the sleeve.
Vulcanization was performed at 20 ° C. for 20 minutes to obtain a fixing roller having a PFA sleeve as a surface layer and an outer diameter of 45 mm and a rubber layer thickness of 2.5 mm. When the fixing roller thus obtained was mounted on an electrophotographic copying machine and used, the toner image formed on the recording paper was subjected to an evaluation test (a test for visually checking for the presence of streak patterns). Almost no streak pattern was observed in the formed toner image. The depth of the depression at the top of the fold of the PFA sleeve was measured with a well-known contact surface roughness meter.
【発明の効果】本発明の定着ローラによれば、弾性ゴム
層を覆う、表層のフッ素樹脂スリーブの外表面に存在す
る折り目頂部の凹みの深さを０．５〜３．０μｍの範囲
としたことにより、折り目頂部の凹みへのトナーの溜ま
りを極端に減少させることができ、製造コストを増大さ
せることなく、画像低下を防止し得る。According to the fixing roller of the present invention, the depth of the crease at the top of the fold existing on the outer surface of the surface fluororesin sleeve that covers the elastic rubber layer is in the range of 0.5 to 3.0 μm. As a result, it is possible to extremely reduce the amount of toner that has accumulated in the depressions at the tops of the folds, and it is possible to prevent image deterioration without increasing the manufacturing cost.
【図１】本発明の定着ローラの一実施例を示す断面図で
ある。FIG. 1 is a sectional view showing an embodiment of a fixing roller of the present invention.
【図２】本発明の同実施例におけるフッ素樹脂スリーブ
の一部Ａを拡大して示す断面図である。FIG. 2 is an enlarged cross-sectional view showing a part A of the fluororesin sleeve according to the embodiment of the present invention.
１０ 凹み １１ 定着ローラ １２ 芯軸 １３ シリコーンゴム １４ フッ素樹脂スリーブ 10 dents 11 fixing roller 12 core shaft 13 Silicone rubber 14 Fluororesin sleeve
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成１３年７月９日（２００１．７．９）[Submission date] July 9, 2001 (2001.7.9)
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】全文[Correction target item name] Full text
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【書類名】 明細書[Document name] Statement
【発明の名称】 定着ローラPatent application title: Fusing roller
【特許請求の範囲】[Claims]
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明は、表層にフッ素樹脂
チューブを有し、電子写真複写機やプリンタなどの熱定
着部に使用される定着ローラに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing roller which has a fluororesin tube on its surface and is used in a heat fixing section of an electrophotographic copying machine or printer.
【０００２】[0002]
【従来の技術】電子写真複写機やプリンタなどの熱定着
部においては、画像形成プロセスにより、加熱溶融性の
樹脂などからなるトナーの画像を記録紙上に形成し、こ
の記録紙を、加熱ヒータを内蔵した定着ローラと加圧ロ
ーラの２つのローラ間に通すことにより定着させる熱定
着方式が一般に採用されている。2. Description of the Related Art In a heat fixing section of an electrophotographic copying machine, a printer or the like, an image of a toner made of a heat-fusible resin or the like is formed on a recording paper by an image forming process, and the recording paper is heated by a heater. A thermal fixing method is generally adopted in which fixing is carried out by passing the roller between a built-in fixing roller and a pressure roller.
【０００３】上記定着ローラは、芯軸の周面上に、耐熱
性を満たすためにシリコーンゴムによる弾性ゴム層を設
け、さらに表層として、トナーとの離型性のよいＰＦＡ
（テトラフルオロエチレン・パーフルオロアルキルビニ
ルエーテル共重合体）によるフッ素樹脂スリーブを被せ
てなるものが多用されている。In the fixing roller, an elastic rubber layer made of silicone rubber is provided on the peripheral surface of the core shaft to satisfy heat resistance, and as a surface layer, a PFA having good releasability from the toner.
The one covered with a fluororesin sleeve made of (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) is often used.
【０００４】定着ローラに使用されるフッ素樹脂スリー
ブは、製造時、管状体に押出成形された後、次の各工程
に移動する際に、複数箇所において対向配置された２つ
の押付けロール等で挟み付けられテープ状にされて走行
され、最終段階でローラ表層として円形にされる。The fluororesin sleeve used for the fixing roller is extruded into a tubular body at the time of manufacture and then sandwiched by two pressing rolls and the like arranged at a plurality of positions when moving to the next step. It is attached and made into a tape shape and run, and at the final stage, it is made circular as a roller surface layer.
【０００５】[0005]
【発明が解決しようとする課題】このため、フッ素樹脂
スリーブは最終的に円形とされても、ロール等で押圧さ
れてテープ状とされた状態での両端部に、長さ方向にそ
って発生した折り目が残存する。しかも、これらの折り
目の外面頂部に、図２に示されるように塑性変形した深
さ５μｍ程度の微小な凹み１０が生じている。Therefore, even if the fluororesin sleeve is finally formed into a circular shape, it is generated along the lengthwise direction at both ends in the state of being pressed into a tape shape by a roll or the like. The folds that have been made remain. In addition, as shown in FIG. 2, a minute recess 10 having a depth of about 5 μm that is plastically deformed is formed at the top of the outer surface of these folds.
【０００６】このような凹み１０を有するフッ素樹脂ス
リーブを表層として被せた定着ローラを複写機等に取り
付けられて使用した場合、凹み内部にトナーが溜まって
記録紙に形成された画像に繊細ながらもすじ状模様が生
じ、画質を低下させる要因となっている。When a fixing roller covered with a fluororesin sleeve having such a recess 10 as a surface layer is used by being attached to a copying machine or the like, toner is accumulated inside the recess and the image formed on the recording paper is delicate, though delicate. A streak pattern is generated, which is a factor that deteriorates the image quality.
【０００７】本発明は、表層のフッ素樹脂スリーブに存
在する折り目の凹みによる画質低下を防止した定着ロー
ラを提供することを目的とするものである。An object of the present invention is to provide a fixing roller which prevents deterioration of image quality due to dents in folds existing in the surface fluororesin sleeve.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明者らは鋭意検討を重ねた結果、上記凹みを完
全に除去することは製作コスト上の問題もあって困難で
あるが、凹みを除去し得なくとも、フッ素樹脂スリーブ
の表面処理を行って凹みの深さを所定値以下とすること
により、実質的に画像低下を防止できることを見出し、
本発明を完成した。In order to achieve the above object, the inventors of the present invention have conducted extensive studies, and as a result, it is difficult to completely remove the above-mentioned dents due to manufacturing cost problems. However, even if it is not possible to remove the recess, by finding that the depth of the recess is less than a predetermined value by performing the surface treatment of the fluororesin sleeve, it is possible to substantially prevent image deterioration,
The present invention has been completed.
【０００９】すなわち、本発明は、芯軸と、前記芯軸周
面上に設けられた弾性ゴム層と、前記弾性ゴム層を覆う
表層のフッ素樹脂スリーブとを備えた定着ローラにおい
て、前記フッ素樹脂スリーブの外表面に存在する折り目
頂部の凹みの深さを、０．５〜３．０μｍの範囲とした
ことを特徴とする。That is, the present invention provides a fixing roller having a core shaft, an elastic rubber layer provided on the peripheral surface of the core shaft, and a surface fluororesin sleeve covering the elastic rubber layer. The depth of the recess at the top of the fold existing on the outer surface of the sleeve is in the range of 0.5 to 3.0 μm.
【００１０】上記構成の定着ローラにおいては、弾性ゴ
ム層を覆う表層のフッ素樹脂スリーブの外表面に存在す
る折り目頂部の凹みの深さ（Ｈ）を、０．５〜３μｍの
範囲としたことにより、凹みへのトナーの溜まりが極端
に減少し、実質的に画像低下を防止し得る。In the fixing roller having the above structure, the depth (H) of the depression at the top of the fold existing on the outer surface of the fluororesin sleeve that covers the elastic rubber layer is set in the range of 0.5 to 3 μm. Therefore, the amount of toner accumulated in the recesses is extremely reduced, and the image deterioration can be substantially prevented.
【００１１】なお、折り目頂部の凹みの深さ（Ｈ）を
０．５〜３．０μｍの範囲に限定したのは、Ｈを０．５
μｍ未満とするフッ素樹脂スリーブは適正コストを考慮
すると製造がきわめて困難であり、またＨが３μｍを越
えるフッ素樹脂スリーブを使用した定着ローラは本発明
による作用効果が得られないからである。The depth (H) of the depression at the top of the fold is limited to the range of 0.5 to 3.0 μm because H is 0.5.
This is because it is extremely difficult to manufacture a fluororesin sleeve having a thickness of less than μm in view of proper cost, and a fixing roller using a fluororesin sleeve having H of more than 3 μm cannot obtain the effects of the present invention.
【００１２】本発明において、前記弾性ゴム層は、シリ
コーンゴムからなり、肉厚が０．０７〜７．５ｍｍであ
ることが好ましく、また、前記フッ素樹脂スリーブは、
肉厚が３０〜１００μｍのＰＦＡスリーブであることが
好ましい。In the present invention, it is preferable that the elastic rubber layer is made of silicone rubber and has a wall thickness of 0.07 to 7.5 mm. Further, the fluororesin sleeve is
It is preferable that the PFA sleeve has a wall thickness of 30 to 100 μm.
【００１３】[0013]
【発明の実施の形態】以下、本発明の定着ローラにおけ
る実施の形態を図面を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a fixing roller of the present invention will be described below with reference to the drawings.
【００１４】図１は本発明の一実施例を示し、図２は図
１Ａ部を拡大して示している。図において、１１は定着
ローラであり、鉄、ステンレス、アルミニウム等の金属
製の芯軸１２上に、耐熱性の良好な弾性ゴム層１３とフ
ッ素樹脂スリーブ１４とを順次同軸的に被覆してなるも
のである。弾性ゴム層１３は、付加反応型シリコーンゴ
ムにより肉厚０．０７〜７．５ｍｍに形成され、フッ素
樹脂スリーブ１４は、ＰＦＡにより肉厚３０〜１００μ
ｍに形成されている。FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows a portion of FIG. 1A in an enlarged scale. In the figure, reference numeral 11 denotes a fixing roller, which comprises a metal core shaft 12 made of iron, stainless steel, aluminum or the like, on which an elastic rubber layer 13 having good heat resistance and a fluororesin sleeve 14 are sequentially coaxially coated. It is a thing. The elastic rubber layer 13 is made of addition reaction type silicone rubber to have a thickness of 0.07 to 7.5 mm, and the fluororesin sleeve 14 is made of PFA to have a thickness of 30 to 100 μm.
It is formed in m.
【００１５】図２に示すように折り目頂部の凹み１０の
深さ（Ｈ）は、フッ素樹脂スリーブ１４の表面処理を行
うことにより、０．５〜３．０μｍの範囲とされてい
る。芯軸１２はパイプ状に形成されている。図示を省略
したが、芯軸１２の中空内には、加熱ヒータ等の熱源が
挿設される。As shown in FIG. 2, the depth (H) of the recess 10 at the top of the fold line is set in the range of 0.5 to 3.0 μm by performing the surface treatment of the fluororesin sleeve 14. The core shaft 12 is formed in a pipe shape. Although not shown, a heat source such as a heater is inserted in the hollow of the core shaft 12.
【００１６】[実施例]ＰＦＡを押出工程にて、押付けロ
ール間荷重を低荷重で外径４１ｍｍ、厚さ０．０５ｍｍ
の管状体を成形すると共に、表面処理を行って、押出工
程時に生じた折り目頂部の凹みの深さ（Ｈ）を２μｍと
したＰＦＡスリーブを成形した。[Example] In the extrusion process of PFA, the load between the pressing rolls is low and the outer diameter is 41 mm and the thickness is 0.05 mm.
The tubular body was molded and a surface treatment was performed to mold a PFA sleeve in which the depth (H) of the crease at the top of the fold was 2 μm.
【００１７】このＰＦＡスリーブを、常法により有底円
筒状の金型の内壁にそって配置し、接着剤を塗布、乾燥
した後、同様に、外面に接着剤を塗布、乾燥した、外径
４０ｍｍ、内径３４ｍｍの芯軸を同金型内に同軸的に配
置し、芯軸とスリーブとの間に、硬度２５度（デュロメ
ータＡ）のシリコーンゴムを注入し、１８０℃、２０分
間で加硫を行って、ＰＦＡスリーブを表層とする、外径
４５ｍｍ、ゴム層肉厚２．５ｍｍの定着ローラを得た。This PFA sleeve was placed along the inner wall of a bottomed cylindrical mold by a conventional method, coated with an adhesive, dried, and then similarly coated with an adhesive on the outer surface and dried. A core shaft having a diameter of 40 mm and an inner diameter of 34 mm is coaxially arranged in the same mold, and a silicone rubber having a hardness of 25 degrees (durometer A) is injected between the core shaft and the sleeve and vulcanized at 180 ° C. for 20 minutes. Then, a fixing roller having a PFA sleeve as a surface layer and having an outer diameter of 45 mm and a rubber layer thickness of 2.5 mm was obtained.
【００１８】得られた定着ローラを、電子写真複写機に
取り付けて使用した際の記録紙に形成されたトナー画像
の評価試験（すじ状模様の有無を目視で確認する検査）
を行ったところ、記録紙に形成されたトナー画像にはす
じ状模様がほとんど認められなかった。Evaluation test of the toner image formed on the recording paper when the fixing roller thus obtained is used by being attached to an electrophotographic copying machine (inspection for visually confirming the presence or absence of streak patterns)
Then, almost no streak pattern was observed in the toner image formed on the recording paper.
【００１９】なお、ＰＦＡスリーブの折り目頂部の凹み
の深さは、周知の接触式表面粗さ計で測定した。The depth of the depression at the top of the fold of the PFA sleeve was measured by a well-known contact type surface roughness meter.
【００２０】[0020]
【発明の効果】本発明の定着ローラによれば、弾性ゴム
層を覆う、表層のフッ素樹脂スリーブの外表面に存在す
る折り目頂部の凹みの深さを０．５〜３．０μｍの範囲
としたことにより、折り目頂部の凹みへのトナーの溜ま
りを極端に減少させることができ、製造コストを増大さ
せることなく、画像低下を防止し得る。According to the fixing roller of the present invention, the depth of the crease at the top of the fold existing on the outer surface of the surface fluororesin sleeve that covers the elastic rubber layer is in the range of 0.5 to 3.0 μm. As a result, it is possible to extremely reduce the amount of toner that has accumulated in the depressions at the tops of the folds, and it is possible to prevent image deterioration without increasing the manufacturing cost.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の定着ローラの一実施例を示す断面図で
ある。FIG. 1 is a sectional view showing an embodiment of a fixing roller of the present invention.
【図２】本発明の同実施例におけるフッ素樹脂スリーブ
の一部Ａを拡大して示す断面図である。FIG. 2 is an enlarged cross-sectional view showing a part A of the fluororesin sleeve according to the embodiment of the present invention.
【符号の説明】 １０ 凹み １１ 定着ローラ １２ 芯軸 １３ シリコーンゴム １４ フッ素樹脂スリーブ[Explanation of symbols] 10 dents 11 fixing roller 12 core shaft 13 Silicone rubber 14 Fluororesin sleeve
フロントページの続き (72)発明者 日下 成利 神奈川県川崎市川崎区小田栄２丁目１番１ 号 昭和電線電纜株式会社内 (72)発明者 國島 敏賢 神奈川県川崎市川崎区小田栄２丁目１番１ 号 昭和電線電纜株式会社内 Ｆターム(参考） 2H033 BB05 BB14 BB15 3J103 FA10 GA02 GA57 GA58 HA04 HA12 HA43 HA47 HA53 Continued front page (72) Inventor Shigetoshi Kusaka 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Showa Densen Denki Co., Ltd. (72) Inventor Toshiken Kunishima 2-1-1 Oda Sakae, Kawasaki-ku, Kawasaki-shi, Kanagawa No. Showa Densen Denki Co., Ltd. F-term (reference) 2H033 BB05 BB14 BB15 3J103 FA10 GA02 GA57 GA58 HA04 HA12 HA43 HA47 HA53
Claims (3)
性ゴム層と、前記弾性ゴム層を覆う表層のフッ素樹脂ス
リーブとを備えた定着ローラにおいて、前記フッ素樹脂
スリーブの外表面に存在する折り目頂部の凹みの深さを
０．５〜３．０μｍの範囲としたことを特徴とする定着
ローラ。1. A fixing roller comprising a core shaft, an elastic rubber layer provided on the peripheral surface of the core shaft, and a surface fluororesin sleeve covering the elastic rubber layer, wherein an outer surface of the fluororesin sleeve is provided. The fixing roller is characterized in that the depth of the dent at the top of the fold line is in the range of 0.5 to 3.0 μm.
なり、肉厚が０．０７〜７．５ｍｍであることを特徴と
する請求項１記載の定着ローラ。2. The fixing roller according to claim 1, wherein the elastic rubber layer is made of silicone rubber and has a wall thickness of 0.07 to 7.5 mm.
〜１００μｍのＰＦＡスリーブであることを特徴とする
請求項１又は２記載の定着ローラ。3. The fluororesin sleeve has a wall thickness of 30.
The fixing roller according to claim 1 or 2, wherein the fixing roller is a PFA sleeve having a thickness of -100 µm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001202963A JP2003015454A (en) | 2001-07-04 | 2001-07-04 | Fixing roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001202963A JP2003015454A (en) | 2001-07-04 | 2001-07-04 | Fixing roll |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003015454A true JP2003015454A (en) | 2003-01-17 |
Family
ID=19039674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001202963A Pending JP2003015454A (en) | 2001-07-04 | 2001-07-04 | Fixing roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003015454A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2159647A1 (en) * | 2008-08-27 | 2010-03-03 | Samsung Electronics Co., Ltd. | Roller, developing united and image forming apparatus having the same, and method of manufacturing roller |
-
2001
- 2001-07-04 JP JP2001202963A patent/JP2003015454A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2159647A1 (en) * | 2008-08-27 | 2010-03-03 | Samsung Electronics Co., Ltd. | Roller, developing united and image forming apparatus having the same, and method of manufacturing roller |
| US8280274B2 (en) | 2008-08-27 | 2012-10-02 | Samsung Electronics Co., Ltd. | Roller, developing unit and image forming apparatus having the same, and method of manufacturing roller |
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