JPH0463862A - Resin composition for roller for holding magnet roll gap of developer - Google Patents
Resin composition for roller for holding magnet roll gap of developerInfo
- Publication number
- JPH0463862A JPH0463862A JP2175874A JP17587490A JPH0463862A JP H0463862 A JPH0463862 A JP H0463862A JP 2175874 A JP2175874 A JP 2175874A JP 17587490 A JP17587490 A JP 17587490A JP H0463862 A JPH0463862 A JP H0463862A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- resin composition
- magnet roll
- roll gap
- developer
- 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.)
- Granted
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 10
- 239000000314 lubricant Substances 0.000 claims abstract description 8
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 5
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 3
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000835 fiber Substances 0.000 claims abstract description 3
- 239000010445 mica Substances 0.000 claims abstract description 3
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 3
- 239000012744 reinforcing agent Substances 0.000 claims description 7
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims 1
- 239000004760 aramid Substances 0.000 claims 1
- 108091008695 photoreceptors Proteins 0.000 abstract description 9
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 abstract description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 2
- 230000002787 reinforcement Effects 0.000 abstract 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 229930182556 Polyacetal Natural products 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は樹脂組成物に関し、特に電子複写機の現像装置
の感光体ドラムとマグネットロールとのギャップを保持
するコロ(以下、ギャップ保持コロという)のための樹
脂組成物に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a resin composition, and particularly to a roller that maintains a gap between a photosensitive drum and a magnet roll of a developing device of an electronic copying machine (hereinafter referred to as a gap retaining roller). ).
まず、図面に基づいて電子複写機の複写機構について説
明する。First, the copying mechanism of the electronic copying machine will be explained based on the drawings.
第1図において、1は給紙カセットで、この給紙カセッ
トl内のコピー用紙2は給紙コロ3、転送コロ4.5を
経て感光体ドラム6下面に達する。In FIG. 1, reference numeral 1 denotes a paper feed cassette, and the copy paper 2 in this paper feed cassette l reaches the lower surface of the photosensitive drum 6 via a paper feed roller 3 and a transfer roller 4.5.
一方、光源(図示せず)を発した光は原稿(図示せず)
の白紙の部分(文字等が記載されていない部分)で反射
され、この反射光りは感光体ドラム6表面に達する。そ
して、この反射光を受けた部分以外の感光体ドラム6表
面は、帯電チャージャー7により所定の電位に帯電する
。On the other hand, the light emitted from the light source (not shown) is the original (not shown).
The reflected light reaches the surface of the photoreceptor drum 6. The surface of the photoreceptor drum 6 other than the portion receiving the reflected light is charged to a predetermined potential by the charging charger 7.
そして、トナー補給ロール8によりマグネットロール9
の周面に供給されたトナーの内、感光体ドラム6の周面
の帯電部分のみがトナーを吸引し、感光体ドラム6下面
でコピー用紙に転写される。その後、搬送コンベヤ10
で定着ユニト(図示せず)へ搬送されて所定の処理を施
され、一連の複写が完了する。Then, the magnet roll 9 is removed by the toner supply roll 8.
Of the toner supplied to the circumferential surface of the photosensitive drum 6, only the charged portion of the circumferential surface of the photosensitive drum 6 attracts the toner, and the toner is transferred onto the copy paper on the lower surface of the photosensitive drum 6. After that, the conveyor 10
The image is then transported to a fixing unit (not shown) and subjected to predetermined processing, completing a series of copies.
上述の記載から明らかなように、感光体ドラムロとマグ
ネットロール9とのギヤングはコピー画像の鮮明度に直
接影響する重要な因子であるため、所定の範囲に収まる
ように厳密に管理することが要求されている。このギャ
ップを所定値に保持するために使用されるのがギャップ
保持コロで、このギャップ保持コロはマグネットロール
9と同軸上でその両端部に嵌装され、感光体ドラム6に
接触しつつマグネットロール9と一体となって回転する
もので、上記したギャップ保持という役目を果たすため
に、以下のような機能を具備することが必要である。As is clear from the above description, the distance between the photoreceptor drum roll and the magnet roll 9 is an important factor that directly affects the clarity of the copied image, so it is required to strictly control it to keep it within a predetermined range. has been done. Gap retaining rollers are used to maintain this gap at a predetermined value. These gap retaining rollers are coaxially fitted with the magnet roll 9 and fitted onto both ends thereof, and while in contact with the photoreceptor drum 6, the gap retaining rollers 9, and in order to fulfill the role of maintaining the gap described above, it is necessary to have the following functions.
すなわち、内周部については、[(a)軸を軽く回転さ
せること。(b)摩耗が少ないこと。(C)侵入するト
ナーによる負荷変動を受けないこと。」等の機能を有し
、外周部については、「(a)摩耗が少ないこと。(b
)相手の感光体ドラムを損傷しないこと」等の機能を有
することが必要である。That is, regarding the inner peripheral part, [(a) rotate the shaft slightly. (b) Less wear. (C) No load fluctuations due to invading toner. ", and the outer periphery has the following functions: (a) less wear; (b)
) It is necessary to have functions such as "not damaging the other party's photoreceptor drum."
なお、ギャップ保持コロに要求される具体的な寸法精度
は、内径・外径寸法交差が0.01〜0.03mm、振
れ精度が0.02na以下という数値であり、従来、こ
のギャップ保持コロ11としては、第2図に示すように
、内側にベアリング12、外側に超高分子量ポリエチレ
ンまたはポリアセタール等の樹脂層13を採用した2層
構造のローラー状のものが多く使用されていた。The specific dimensional accuracy required for the gap holding roller is that the inner diameter/outer diameter dimension intersection is 0.01 to 0.03 mm, and the runout accuracy is 0.02 na or less. As shown in FIG. 2, a roller-like roller having a two-layer structure is often used, which has a bearing 12 on the inside and a resin layer 13 made of ultra-high molecular weight polyethylene or polyacetal on the outside.
従来のギャップ保持コロは上記した所要の諸機能をほぼ
満足するものではあるが、内側のヘアリングおよび外側
の樹脂の2層構造からなるものであるため、製作コスト
が高い。Although the conventional gap holding roller satisfies most of the above-mentioned required functions, it is expensive to manufacture because it has a two-layer structure of an inner hair ring and an outer resin.
本発明は従来の技術の有するこのような問題点に鑑みて
なされたものであり、その目的は、耐摩耗性に優れ、回
転が滑らかで、感光体ドラムを損傷することがなく、侵
入するトナーによる負荷変動を受けにくいギヤ・ンプ保
持コロのための安価で耐久性に優れた樹脂組成物を提供
することにある。The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to provide excellent wear resistance, smooth rotation, no damage to the photoreceptor drum, and to prevent intruding toner from entering the drum. An object of the present invention is to provide an inexpensive and highly durable resin composition for a gear pump holding roller that is less susceptible to load fluctuations due to
上記目的を達成するために、本発明の要旨はポリアミド
樹脂が45〜90重量%、アラミド繊維等の有機物系補
強剤または雲母、チタン酸カリウム繊維等の無機物系補
強剤のいずれか一方または両方が5〜35重量%、およ
びポリテトラフルオロエチレン(以下、PTFEという
)、超高分子量ポリエチレン等の潤滑剤が5〜20重量
%からなる現像装置のマグネントロルギャップ保持コロ
用樹脂組成物にある。In order to achieve the above object, the gist of the present invention is that the polyamide resin is 45 to 90% by weight, and either or both of an organic reinforcing agent such as aramid fiber or an inorganic reinforcing agent such as mica or potassium titanate fiber is used. A resin composition for a magnetorol gap holding roller of a developing device includes 5 to 35% by weight of a lubricant such as polytetrafluoroethylene (hereinafter referred to as PTFE) or ultra-high molecular weight polyethylene.
ポリアミド樹脂としては、12ナイロン、6ナイロン、
46ナイロン、66ナイロン等を挙げることができる。Polyamide resins include 12 nylon, 6 nylon,
Examples include 46 nylon and 66 nylon.
無機物系補強剤としては、硫酸カルシウム等を使用する
こともできる。Calcium sulfate or the like can also be used as the inorganic reinforcing agent.
潤滑剤としては、硫化モリブデン、四フッ化エチレン、
黒鉛等を使用することもできる。Lubricants include molybdenum sulfide, tetrafluoroethylene,
Graphite etc. can also be used.
ポリアミド樹脂は、摩擦係数が小さく耐摩耗性に優れ、
しかも自己潤滑性に優れているため、感光体ドラムを損
傷しに(く、回転が滑らかである。Polyamide resin has a small coefficient of friction and excellent wear resistance.
Moreover, since it has excellent self-lubricating properties, it does not damage the photoreceptor drum and rotates smoothly.
また、補強剤を本発明の範囲内で配合することにより、
−層変形しにくく、成形収縮量が減少して寸法精度が向
上する。In addition, by incorporating a reinforcing agent within the scope of the present invention,
- Resistant to layer deformation, reduces molding shrinkage and improves dimensional accuracy.
そして、潤滑剤を本発明の範囲内で配合することにより
、摩擦摩耗特性がさらに向上するとともに摺動音の低減
を図ることができる。By blending the lubricant within the scope of the present invention, the friction and wear characteristics can be further improved and sliding noise can be reduced.
本発明の実施例ならびに比較例について以下に説明する
。Examples and comparative examples of the present invention will be described below.
8頁の表1に示すように、ポリアミド樹脂に対して適正
量の補強剤および潤滑剤を配合した本実施例に係る樹脂
組成物、ポリフェニレンサルファイド樹脂(以下、PP
Sという)に対してガラス繊維とPTFEを配合した比
較例1に係る樹脂組成物、およびポリアセタール樹脂単
体の比較例2について、所定形状の試験片を作製し、比
重(ASTMD792) 、引張強度(ASTMD63
8) 、曲げ強度(ASTMD790)、曲げ弾性率(
ASTMD 790 ) 、線膨張係数(ASTMD
696 ) 、熱変形温度(ASTMD648)、摩擦
係数および摩耗量の測定を行った。その結果を表1に併
記する。As shown in Table 1 on page 8, the resin composition according to this example, in which appropriate amounts of reinforcing agent and lubricant were blended with polyamide resin, polyphenylene sulfide resin (hereinafter referred to as PP)
Test pieces of predetermined shapes were prepared for the resin composition of Comparative Example 1 in which glass fiber and PTFE were blended with S and the comparative example 2 of polyacetal resin alone, and the specific gravity (ASTMD792) and tensile strength (ASTMD63
8), bending strength (ASTMD790), bending modulus (
ASTM D 790), coefficient of linear expansion (ASTMD
696), heat distortion temperature (ASTMD648), coefficient of friction, and amount of wear were measured. The results are also listed in Table 1.
なお、摩擦係数および摩耗量の測定は銘木式摩擦摩耗試
験機で行い、その試験条件は、荷重2kg/cm”、速
度20 m/min 、相手材A9.5056、走行時
間48時間とした。The friction coefficient and the amount of wear were measured using a precious wood type friction and wear tester, and the test conditions were a load of 2 kg/cm'', a speed of 20 m/min, a mating material A of 9.5056, and a running time of 48 hours.
また、−成分系トナー介在下で銘木式摩擦摩耗試験機に
より、以下に示す条件でモーター負荷変動を調査した。In addition, motor load fluctuations were investigated using a precious wood type friction and wear tester under the conditions shown below in the presence of -component toner.
その結果を第3図に示す。The results are shown in FIG.
第3図の横軸は走行時間を示し、縦軸はモーター電流を
示す。The horizontal axis in FIG. 3 shows running time, and the vertical axis shows motor current.
第3図において、曲線A、B、C,D、E、Fはそれぞ
れ、本実施例1.2.3.4、比較例1.2に係るもの
についてのモーター電流の推移を示す。In FIG. 3, curves A, B, C, D, E, and F show the changes in motor current for Examples 1.2.3.4 and Comparative Example 1.2, respectively.
荷重= 1 kg/c+w” 、速度−20m/min
、相手材−A15056、走行時間=20時間表1より
、以下の点が明らかである。Load = 1 kg/c+w”, speed -20m/min
, mating material-A15056, running time = 20 hours From Table 1, the following points are clear.
■本実族例に係るものは、比較例1.2に比して摩擦係
数が小さく且つ摩耗量が少なくて、摩擦摩耗特性の優れ
たものであることが分かる。(2) It can be seen that the material according to this example has a smaller friction coefficient and less wear than Comparative Example 1.2, and has excellent friction and wear characteristics.
■比較例1に係るものは、強度および曲げ弾性率が高く
且つ耐熱性は優れでいるが、摩擦係数が大きくて摩耗量
が多いので、ギャップ保持コロ用材料としては不適であ
る。(2) Although the material according to Comparative Example 1 has high strength and flexural modulus and excellent heat resistance, it has a large coefficient of friction and a large amount of wear, so it is not suitable as a material for gap holding rollers.
■比較例2に係るものは、何等補強材が配合されていな
いので強度および曲げ弾性率が低く、また、潤滑剤が配
合されていないので、摩擦係数が大きく且つ摩耗量が多
い。従って、ギャップ保持コロ用材料としては不通であ
る。(2) The material according to Comparative Example 2 has low strength and flexural modulus because it does not contain any reinforcing material, and has a large coefficient of friction and a large amount of wear because it does not contain a lubricant. Therefore, it cannot be used as a material for gap holding rollers.
第3図に明らかなように、比較例1.2に係るもの(曲
線E、F)は、試験開始後4時間〜10時間程度でモー
ター電流が急激に上昇し、モータートルク限界に達して
モーターは停止した。しかし、本実施例1〜4に係るも
の(曲線A、B、C,D)は、いずれもモーター電流は
安定した状態で推移し、問題なくテストを行うことがで
きた。As is clear from FIG. 3, in Comparative Example 1.2 (curves E and F), the motor current rapidly increased about 4 to 10 hours after the start of the test, and the motor torque limit was reached, causing the motor to has stopped. However, in all of Examples 1 to 4 (curves A, B, C, and D), the motor current remained stable and the test could be conducted without any problems.
(1)本発明に係る樹脂組成物は、N擦摩耗特性および
自己潤滑性に優れているので、ギヤ・ンプ保持コロ用材
料として極めて好適に用いることができる。(1) The resin composition according to the present invention has excellent N friction and wear characteristics and self-lubricating properties, so it can be used very suitably as a material for gear pump holding rollers.
(2)シかも、樹脂組成物単体でギャップ保持コロを作
製することができるので、コスト低下を図ることができ
、2層構造の場合と違ってヘアリングと樹脂との接着力
を考慮する必要もない。(2) Moreover, since the gap retaining roller can be made from a single resin composition, it is possible to reduce costs, and unlike in the case of a two-layer structure, it is necessary to consider the adhesive force between the hair ring and the resin. Nor.
第1図は電子複写機の概略構成の一例を示す、一部切欠
透視図、第2図は感光体ドラム、マグネットロールおよ
びギャップ保持コロの配置を示す拡大断面図、第3図は
トナー介在下での摩擦摩耗試験におけるモーター負荷電
流の推移を示す図である。
6・・感光体ドラム、9・・マグネットロール、11・
・ギャップ保持コロFig. 1 is a partially cutaway perspective view showing an example of the schematic configuration of an electronic copying machine, Fig. 2 is an enlarged sectional view showing the arrangement of the photoreceptor drum, magnet roll, and gap holding roller, and Fig. 3 is a toner-interposed state. FIG. 3 is a diagram showing the transition of motor load current in a friction and wear test. 6... Photosensitive drum, 9... Magnet roll, 11... Gap holding roller
Claims (1)
有機物系補強剤または雲母、チタン酸カリウム繊維等の
無機物系補強剤のいずれか一方または両方が5〜35重
量%、およびポリテトラフルオロエチレン、超高分子量
ポリエチレン等の潤滑剤が5〜20重量%からなる現像
装置のマグネットロールギャップ保持コロ用樹脂組成物45 to 90% by weight of polyamide resin, 5 to 35% by weight of either or both of organic reinforcing agents such as aramid fibers or inorganic reinforcing agents such as mica and potassium titanate fibers, and polytetrafluoroethylene, A resin composition for a magnetic roll gap holding roller in a developing device, comprising 5 to 20% by weight of a lubricant such as high molecular weight polyethylene.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2175874A JP2922597B2 (en) | 1990-07-02 | 1990-07-02 | Resin composition for magnet roll gap holding roller of developing device and magnet roll gap holding roller using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2175874A JP2922597B2 (en) | 1990-07-02 | 1990-07-02 | Resin composition for magnet roll gap holding roller of developing device and magnet roll gap holding roller using the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0463862A true JPH0463862A (en) | 1992-02-28 |
JP2922597B2 JP2922597B2 (en) | 1999-07-26 |
Family
ID=16003719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2175874A Expired - Fee Related JP2922597B2 (en) | 1990-07-02 | 1990-07-02 | Resin composition for magnet roll gap holding roller of developing device and magnet roll gap holding roller using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2922597B2 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6918865B2 (en) | 2002-10-31 | 2005-07-19 | Voith Paper Patent Gmbh | Roll cover |
US7014604B2 (en) | 2002-07-19 | 2006-03-21 | Voith Paper Patent Gmbh | Paper machine roll cover |
JP2009028956A (en) * | 2007-07-25 | 2009-02-12 | Toppan Printing Co Ltd | Resin layered body and transfer sheet |
US11732150B2 (en) | 2016-04-15 | 2023-08-22 | Hewlett-Packard Development Company, L.P. | Composite particulate build materials |
-
1990
- 1990-07-02 JP JP2175874A patent/JP2922597B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7014604B2 (en) | 2002-07-19 | 2006-03-21 | Voith Paper Patent Gmbh | Paper machine roll cover |
US6918865B2 (en) | 2002-10-31 | 2005-07-19 | Voith Paper Patent Gmbh | Roll cover |
JP2009028956A (en) * | 2007-07-25 | 2009-02-12 | Toppan Printing Co Ltd | Resin layered body and transfer sheet |
US11732150B2 (en) | 2016-04-15 | 2023-08-22 | Hewlett-Packard Development Company, L.P. | Composite particulate build materials |
Also Published As
Publication number | Publication date |
---|---|
JP2922597B2 (en) | 1999-07-26 |
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