JPH0374395B2 - - Google Patents
Info
- Publication number
- JPH0374395B2 JPH0374395B2 JP16941383A JP16941383A JPH0374395B2 JP H0374395 B2 JPH0374395 B2 JP H0374395B2 JP 16941383 A JP16941383 A JP 16941383A JP 16941383 A JP16941383 A JP 16941383A JP H0374395 B2 JPH0374395 B2 JP H0374395B2
- Authority
- JP
- Japan
- Prior art keywords
- prevention layer
- roll
- offset
- offset prevention
- core
- 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
Links
- 230000002265 prevention Effects 0.000 claims description 24
- 239000000945 filler Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000011231 conductive filler Substances 0.000 claims 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims 1
- 229910010271 silicon carbide Inorganic materials 0.000 claims 1
- 239000011162 core material Substances 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 229920001774 Perfluoroether Polymers 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 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
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
- G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
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の画像定着プロセスに
用いる加熱ロールの特に表面を被覆するオフセツ
ト防止層の改良に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in an anti-offset layer particularly covering the surface of a heating roll used in the image fixing process of an electrophotographic copying machine.
従来技術
従来、乾式電子写真複写機の定着装置には、い
わゆる加熱ロール方式が多用されている。これは
表面に非粘着性の物質、例えば四フツ化エチレン
樹脂、シリコーンゴム、フルオロカーボン樹脂等
の被膜を施したロール対の一方または両方の内部
に赤外線電球の如き加熱素子を設け、その両ロー
ル間に適当な圧力を加えつつ、回転可能に両ロー
ルの軸部を枢支したものであつて、トナー像を転
写した複写用紙を前記両ロール間に通過させて定
着を行うようになつている。この加熱ロール型定
着装置は、比較的低電力で作動し、かつ火災の危
険がないなど優れた利点を有しているが、その反
面良好な定着を得るためには両ロールの温度、紙
送り速度等の関係が限られていて、その範囲を逸
脱すると、いわゆるオフセツトと称するトナーの
加熱ロールへの付着が発生し、また複写用紙の加
熱ロールへの付着による紙詰りが生ずることがあ
つた。オフセツト防止層には一般に熱伝導率が非
常に低い材料が用いられるために、通常10μm〜
100μm程度の薄層にされ、被加熱物である用紙等
への熱伝達量が増加するよう設計されている。ま
た、表面のオフセツト防止層は非粘着性であるた
め、ロールコア（金属ロール等）との間にプライ
マー層を設けて、オフセツト防止層の接着強度を
保つようにしているが、接着強度を一層増加させ
るためにロールコア表面をサンド・プラスト処理
や機械加工して中心線平均粗さ（Ra）として、
1μm〜5μm程度の凹凸を設けて、接着表面積を増
加させたり投錨効果によつて接着力の増強をはか
つている。PRIOR ART Conventionally, a so-called heated roll system has been frequently used in the fixing device of a dry type electrophotographic copying machine. In this method, a heating element such as an infrared light bulb is installed inside one or both of a pair of rolls whose surfaces are coated with a non-adhesive material such as tetrafluoroethylene resin, silicone rubber, or fluorocarbon resin. The shafts of both rolls are rotatably supported while applying an appropriate pressure to the toner image, and the copying paper on which the toner image has been transferred is passed between the two rolls for fixing. This heating roll type fixing device has excellent advantages such as operating with relatively low power and no risk of fire, but on the other hand, in order to obtain good fixing, it is necessary to The relationship between the speed and the like is limited, and if it deviates from this range, toner adhesion to the heating roll, called offset, may occur, and paper jams may occur due to adhesion of copy paper to the heating roll. Since a material with very low thermal conductivity is generally used for the offset prevention layer, it is usually 10 μm or more.
It is designed to be a thin layer of about 100 μm and increase the amount of heat transferred to the heated object, such as paper. In addition, since the offset prevention layer on the surface is non-adhesive, a primer layer is provided between it and the roll core (metal roll, etc.) to maintain the adhesive strength of the offset prevention layer, but the adhesive strength is further increased. In order to obtain
By providing irregularities of approximately 1 μm to 5 μm, the adhesive surface area is increased and the adhesive strength is enhanced by the anchoring effect.
しかしながら、複写機の高速化に伴つて、オフ
セツト防止層を薄層化して伝熱量を増加させるこ
とが要求されてきているが、この薄層化によつて
凹凸を有するコアの表面が一部露出して、オフセ
ツトを誘発すると共にオフセツト防止層の実質的
な厚みがコアの凹凸により変化するため被加熱物
への伝熱ムラ、すなわち定着具合のムラが顕著と
なつてくる。 However, as copying machines become faster, there is a need to make the offset prevention layer thinner to increase the amount of heat transfer, but this thinner layer exposes a portion of the uneven core surface. As a result, offset is induced and the substantial thickness of the offset prevention layer changes due to the unevenness of the core, resulting in uneven heat transfer to the object to be heated, that is, uneven fixing.
発明の目的
従つて、本発明は前述の如き欠点を解消したオ
フセツト防止層を備えた熱定着ロールを提供する
ことを目的とする。OBJECTS OF THE INVENTION Accordingly, an object of the present invention is to provide a heat fixing roll provided with an anti-offset layer that eliminates the above-mentioned drawbacks.
発明の構成
本発明の目的は、表面に凹凸を有するロールの
コアにプライマー層と表面オフセツト防止層を有
する電子写真複写機の加熱定着装置に用いられる
加熱定着ロールにおいて、プライマー層が熱伝導
性の充填材を含有していることにより達成され
る。Structure of the Invention An object of the present invention is to provide a heat fixing roll used in a heat fixing device of an electrophotographic copying machine, which has a primer layer and a surface offset prevention layer on the core of the roll having an uneven surface. This is achieved by containing fillers.
以下、添付図面に基づき本発明を説明する。 Hereinafter, the present invention will be explained based on the accompanying drawings.
第１図に示すよう、ロール・コア１表面はサン
ド・ブラスト処理等により表面粗さは1μm〜5μm
（中心線平均粗さにて）程度の凹凸が形成される。
従つて凹凸の最大高さは中心線平均粗さの約４倍
程度の4μm〜20μmになる。この面にプライマー
層２が形成され、更にその上面にオフセツト防止
層３が形成される。プライマーとしてはコア材及
びオフセツト防止層材料の両者に親和性を有する
材料が用いられる。 As shown in Figure 1, the surface roughness of the roll core 1 is 1 μm to 5 μm due to sand blasting, etc.
(center line average roughness) degree of unevenness is formed.
Therefore, the maximum height of the unevenness is about 4 μm to 20 μm, which is about 4 times the center line average roughness. A primer layer 2 is formed on this surface, and an offset prevention layer 3 is further formed on its upper surface. As the primer, a material having affinity with both the core material and the offset prevention layer material is used.
例えば、オフセツト防止層にパーフルオロアル
コキシ樹脂（商品名MP−10、三井フロロケミカ
ル(株)製）を用いる場合、MP−902（三井フロロケ
ミカル(株)製）がプライマー材料として用いられ
る。 For example, when a perfluoroalkoxy resin (trade name MP-10, manufactured by Mitsui Fluorochemical Co., Ltd.) is used for the offset prevention layer, MP-902 (manufactured by Mitsui Fluorochemical Co., Ltd.) is used as the primer material.
このようにプライマー材料もオフセツト防止層
と同様な材料で構成されているため熱伝導性は低
い。プライマーはハケ塗りや吹き付け等の通常の
方法により塗布され、必要に応じ焼付け処理され
る。 As described above, since the primer material is made of the same material as the offset prevention layer, its thermal conductivity is low. The primer is applied by a conventional method such as brushing or spraying, and is baked if necessary.
塗布の状態は一般的にコアの凹凸面に沿い、均
等な厚さにはならず、第１図のようにレベリング
効果で特に凹凸谷部に貯つた状態にて塗布され
る。このプライマーの上面にオフセツト防止層３
が形成されるが、前記のパーフルオロアルコキシ
樹脂をオフセツト防止層とする場合は、平均粒径
が2μm〜15μmの略球形粉体であり、樹脂粉体を
帯電させて、吹き付け等により塗着する静電粉体
塗装により塗膜を形成し、その後加熱融着させて
固定し、必要に応じて塗膜表面を研磨し所定の表
面粗度に仕上げられる。 Generally, the coating is applied along the uneven surface of the core, and the thickness is not uniform, but as shown in FIG. 1, the coating is applied in a state where it accumulates particularly in the valleys of the unevenness due to the leveling effect. An offset prevention layer 3 is placed on the top surface of this primer.
However, when the above-mentioned perfluoroalkoxy resin is used as an offset prevention layer, it is a roughly spherical powder with an average particle size of 2 μm to 15 μm, and the resin powder is charged and applied by spraying or the like. A coating film is formed by electrostatic powder coating, then heated and fused to fix the coating, and if necessary, the coating film surface is polished to a predetermined surface roughness.
オフセツト防止層の厚さは通常30μm〜50μm程
度の厚さであるが、その熱伝導率は0.0005cal／
cm・sec・℃であり、アルミニウムの約1000分の
１程度と低く、伝熱の面からは出来る限り薄膜で
あることが望ましい。しかしながら、膜が薄くな
るに従つてコアの凹凸面の凸部が露出し、実用の
際はオフセツト現象を呈する原因となる。中心線
平均粗さを4μmとした場合、オフセツト防止層厚
さは約20μm程度が限界となる。また、コア凸部
からオフセツト防止層表面までの距離とコア凹部
から表面までの距離の比がオフセツト防止層を薄
膜化することにより大きくなり、用紙等被過熱物
への伝熱量が異なることになり定着具合に差を生
じる。 The thickness of the offset prevention layer is usually about 30 μm to 50 μm, but its thermal conductivity is 0.0005 cal/
cm・sec・°C, which is about 1/1000th that of aluminum, and from the standpoint of heat transfer, it is desirable that the film be as thin as possible. However, as the film becomes thinner, the convex portions of the uneven surface of the core are exposed, which causes an offset phenomenon in practical use. When the center line average roughness is 4 μm, the maximum thickness of the offset prevention layer is about 20 μm. In addition, the ratio of the distance from the core convex part to the surface of the offset prevention layer and the distance from the core concave part to the surface increases by making the offset prevention layer thinner, and the amount of heat transferred to the heated object such as paper differs. It makes a difference in the degree of fixation.
本発明においては、プライマーに充填材を混ぜ
ることによりプライマー層の熱伝導性を向上さ
せ、また接着力を増強するため、コア材表面を凹
凸処理して伝熱への影響を少なくする。 In the present invention, the thermal conductivity of the primer layer is improved by mixing a filler with the primer, and in order to increase the adhesive strength, the surface of the core material is treated to have irregularities to reduce the effect on heat transfer.
本発明に用いる充填材の具体例としては、アル
ミニウム、銅のごとき金属粉、シリコーン・カー
バイト（SiC）、酸化ケイ素（SiO）、アルミナ
（Al2O3）等の無機化合物があげられ、充填材の
平均粒径は1μm以下が好ましく、また配合率は５
〜200重量％が適当である。これらの充填材をプ
ライマーに添加することにより伝熱特性の改善が
得られる。 Specific examples of fillers used in the present invention include metal powders such as aluminum and copper, inorganic compounds such as silicone carbide (SiC), silicon oxide (SiO), and alumina (Al 2 O 3 ). The average particle size of the material is preferably 1 μm or less, and the blending ratio is 5
~200% by weight is suitable. By adding these fillers to the primer, improved heat transfer properties can be obtained.
実施例 １
アルミニウムのロールコアに、サンド・ブラス
ト処理により中心線平均粗さ3.5μmの凹凸を形成
し、シリコーン・カーバイトを45重量％を含むプ
ライマーMP−902（三井フロロケミカル製）を刷
け塗りによつて、凹凸がうまる程度に塗布した
後、パーアルオロアルコキシ樹脂粉体としてMP
−10（三井フロロケミカル(株)製）を静電吹付け塗
装し、360℃にて10分間加熱しオフセツト防止層
を形成し、中心線平均粗さが0.8μmとなるように
表面を研磨し、約30μmのオフセツト防止層とし
た。Example 1 An aluminum roll core was sand-blasted to form irregularities with an average center line roughness of 3.5 μm, and then coated with primer MP-902 (manufactured by Mitsui Fluorochemical) containing 45% by weight of silicone carbide. After coating to the extent that the unevenness is smoothed out, MP is applied as peraloloalkoxy resin powder.
-10 (manufactured by Mitsui Fluorochemical Co., Ltd.) was electrostatically sprayed, heated at 360°C for 10 minutes to form an offset prevention layer, and the surface was polished so that the center line average roughness was 0.8 μm. , an offset prevention layer of about 30 μm.
シリコーン・カーバイトは0.16cal／cm・sec・
℃の熱伝導率（スチールにて0.103cal／cm・
sec・℃）を有しており、上記ロールにて定着テ
ストを行つたところ充填材を含まない約25μm厚
のオフセツト防止層を有する加熱ロールとほぼ同
等の定着性能を示し、またオフセツトの発生も抑
えられていることが確認された。 Silicone carbide is 0.16cal/cm・sec・
Thermal conductivity in °C (0.103cal/cm for steel)
sec・℃), and when we conducted a fixing test using the roll mentioned above, it showed almost the same fixing performance as a heated roll that does not contain fillers and has an offset prevention layer of approximately 25 μm thickness, and also caused no offset. It was confirmed that it was suppressed.
実施例 ２
実施例１と同様の手順にて約20μmのオフセツ
ト防止層を形成した。Example 2 An offset prevention layer of approximately 20 μm was formed in the same manner as in Example 1.
充填材を含まないものも同様に約20μmのオフ
セツト防止層を形成したところ、ロールの一部に
下地コアの一部が露出していることが確認され、
定着テストでもオフセツトが発生した。 When we similarly formed an offset prevention layer of approximately 20 μm on a roll that did not contain filler, it was confirmed that part of the base core was exposed on a part of the roll.
Offset also occurred in the fixation test.
一方、本発明による加熱ロールではオフセツト
が発生せず、また定着ムラによる画像の溶け具合
の差（反射率の差）も確認されなかつた。 On the other hand, with the heating roll according to the present invention, no offset occurred, and no difference in image melting (difference in reflectance) due to uneven fixation was observed.
発明の効果
以上述べたように、本発明の熱定着ロールはプ
ライマー層に熱伝導性の良い充填材を添加したも
のであり、オフセツト防止層全体として熱伝導性
が向上し、被加熱物への伝熱効率の向上がはかれ
ると共に、接着力が増強し、コアに施した凹凸に
よる伝熱のムラはプライマーの熱伝導性の向上に
より減少され良好な定着性能が得られ、オフセツ
トの発生も防止される。Effects of the Invention As described above, in the heat fixing roll of the present invention, a filler with good thermal conductivity is added to the primer layer, and the thermal conductivity of the offset prevention layer as a whole is improved, making it possible to reduce the heat transfer to the heated object. The heat transfer efficiency is improved, the adhesive strength is strengthened, uneven heat transfer due to the unevenness of the core is reduced due to the improved thermal conductivity of the primer, good fixing performance is obtained, and the occurrence of offset is also prevented. .
第１図は本発明の加熱定着ロールコアの断面図
である。
図中符号、１……ロールコア、２……プライマ
ー層、３……オフセツト防止層、４……充填材。
FIG. 1 is a sectional view of the heat fixing roll core of the present invention. Symbols in the figure: 1... Roll core, 2... Primer layer, 3... Offset prevention layer, 4... Filler.
Claims (1)
ー層と表面オフセツト防止層を有する電子写真複
写機の加熱定着装置に用いられる加熱定着ロール
において、プライマー層が熱伝導性の充填材を含
有していることを特徴とする加熱定着ロール。 ２ 充填材がシリコンカーバイトである特許請求
の範囲第１項に記載の加熱定着ロール。[Scope of Claims] 1. In a heat fixing roll used in a heat fixing device of an electrophotographic copying machine, which has a primer layer and a surface offset prevention layer on the core of the roll having an uneven surface, the primer layer is a thermally conductive filler. A heating fixing roll characterized by containing. 2. The heat fixing roll according to claim 1, wherein the filler is silicon carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16941383A JPS6061779A (en) | 1983-09-16 | 1983-09-16 | Fixing roll in electrophotographic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16941383A JPS6061779A (en) | 1983-09-16 | 1983-09-16 | Fixing roll in electrophotographic copying machine |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28242792A Division JPH05249862A (en) | 1992-09-28 | 1992-09-28 | Fixing roll in electrophotographic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6061779A JPS6061779A (en) | 1985-04-09 |
| JPH0374395B2 true JPH0374395B2 (en) | 1991-11-26 |
Family
ID=15886134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16941383A Granted JPS6061779A (en) | 1983-09-16 | 1983-09-16 | Fixing roll in electrophotographic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6061779A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61145574A (en) * | 1984-12-19 | 1986-07-03 | Nitto Kogyo Kk | Fixing roller of electronic copying machine or the like |
| JPH02150876A (en) * | 1988-12-02 | 1990-06-11 | Canon Inc | Elastic rotating body and fixation device |
| CN101467105A (en) * | 2006-06-08 | 2009-06-24 | 株式会社远藤制作所 | Tube for fixing and process for producing the same |
-
1983
- 1983-09-16 JP JP16941383A patent/JPS6061779A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6061779A (en) | 1985-04-09 |
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