JPH01186981A - Roller for nonmagnetic one-component development - Google Patents
Roller for nonmagnetic one-component developmentInfo
- Publication number
- JPH01186981A JPH01186981A JP63009742A JP974288A JPH01186981A JP H01186981 A JPH01186981 A JP H01186981A JP 63009742 A JP63009742 A JP 63009742A JP 974288 A JP974288 A JP 974288A JP H01186981 A JPH01186981 A JP H01186981A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- lower layer
- rubber
- developing roller
- magnetic
- 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
- 230000003746 surface roughness Effects 0.000 claims abstract description 9
- 229920006311 Urethane elastomer Polymers 0.000 claims abstract description 7
- 229920001971 elastomer Polymers 0.000 claims abstract description 7
- 239000005060 rubber Substances 0.000 claims abstract description 7
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 7
- 239000004945 silicone rubber Substances 0.000 claims abstract description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 4
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 4
- 229920001194 natural rubber Polymers 0.000 claims abstract description 4
- 229920005573 silicon-containing polymer Polymers 0.000 claims abstract description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000005977 Ethylene Substances 0.000 claims abstract description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 3
- 229920005690 natural copolymer Polymers 0.000 claims abstract 2
- 108091008695 photoreceptors Proteins 0.000 claims description 5
- 239000010408 film Substances 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000004014 plasticizer Substances 0.000 abstract description 8
- 230000000740 bleeding effect Effects 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 229920001296 polysiloxane Polymers 0.000 description 13
- 239000000463 material Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- -1 ethylene, propylene Chemical group 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- LAQFLZHBVPULPL-UHFFFAOYSA-N methyl(phenyl)silicon Chemical compound C[Si]C1=CC=CC=C1 LAQFLZHBVPULPL-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Laminated Bodies (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分計〉
本発明は、複写機、レーザ・プリンタ等の静電現像装置
に適用される非磁性一成分現像用ローラに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application> The present invention relates to a non-magnetic one-component developing roller that is applied to electrostatic developing devices such as copying machines and laser printers.
〈従来の技術〉
一般に、非磁性一成分系現像剤（トナー）を用いた静電
潜像現像装置には、静電潜像を保持した感光体にトナー
を付着させるための現像用ローラが用いられている。す
なわち、例えば第２図に示すように、現像用ローラは該
現像用ローラ１０にトナー１１を付着するためのトナー
塗布用ローラ１２と、表面に静電潜像を保持する感光体
である感光ドラム１３との間に設けられてお秒、トナー
塗布用ローラ１２により現像用ローラ１０の表面に塗布
された後規制部材１４によって薄膜状とされたトナーは
、感光ドラム１３上の静電潜像に付着されるようになっ
ている。<Prior art> Generally, an electrostatic latent image developing device using a non-magnetic one-component developer (toner) uses a developing roller to attach the toner to a photoreceptor holding an electrostatic latent image. It is being That is, as shown in FIG. 2, for example, the developing roller includes a toner applying roller 12 for applying toner 11 to the developing roller 10, and a photosensitive drum that is a photosensitive member that holds an electrostatic latent image on its surface. The toner applied to the surface of the developing roller 10 by the toner applying roller 12 and made into a thin film by the regulating member 14 is applied to the electrostatic latent image on the photosensitive drum 13. It is designed to be attached.
この場合、現像用ローラ１０は感光ドラム１３と密着し
た状態を保たなければならないので、その機能上、通常
は芯金上にアクリロニトリル・ブタジェンゴム（ＮＢＲ
）やスチレン・ブタジェンゴム（ＳＢＲ）などの弾性ゴ
ムを成形した構造となっている。In this case, the developing roller 10 must be kept in close contact with the photosensitive drum 13, so for its function, acrylonitrile butadiene rubber (NBR) is usually used on the core metal.
) or styrene-butadiene rubber (SBR).
〈発明が解決しようとする課題〉
しかしながら、従来の現像用ローラは単一材質のゴムで
形成されているので、高硬度材質を用いた場合には感光
ドラムとの接触面積が小さく且つばらつき易いので、画
像が不安定となり、一方、低硬度材質にすると可塑剤の
しみ出し、ローラの耐摩耗性の低下、圧縮永久歪、表面
粗さなどの問題が生じる。また、両者共に、その表面に
トナーがへばりつく、いわゆるフィルミングが生じ易く
、長期間の使用には耐えないという問題もある。<Problem to be solved by the invention> However, since the conventional developing roller is made of a single material of rubber, when a high hardness material is used, the contact area with the photosensitive drum is small and tends to vary. On the other hand, if a material with low hardness is used, problems such as seepage of plasticizer, reduction in roller wear resistance, compression set, and surface roughness occur. In addition, both types tend to cause so-called filming, in which the toner sticks to the surface, and there is a problem that they cannot withstand long-term use.
本発明はこのような事情に鑑み、低硬度でありながら、
トナー離型性、＃４＊耗性、低圧縮永久歪性が良好で且
つ可塑剤等のしみ出しの少く、むらの少ない画像を得ろ
ことができる非磁性一成分現像用ローラを提供すること
を目的とする。In view of these circumstances, the present invention has a low hardness,
It is an object of the present invention to provide a non-magnetic one-component developing roller that has good toner releasability, #4* abrasion resistance, and low compression set, and is capable of obtaining images with little seepage of plasticizers and unevenness. purpose.
く課題を解決するための手段〉
前記目的を達成する本発明の非磁性−成分現像用ローラ
ば、周面上に非磁性一成分系現像剤をＲ膜状に保持する
とともに該現像剤を静電潜像を保持する感光体に付着す
る非磁性一成分現像用ローラにおいて、ウレタンゴム。Means for Solving the Problems> The non-magnetic component developing roller of the present invention which achieves the above object holds a non-magnetic one-component developer in the form of an R film on the circumferential surface and statically holds the developer. Urethane rubber is used in non-magnetic one-component developing rollers that adhere to the photoreceptor that holds the latent image.
シリコーンゴム、天然ゴム並びにエチレン。Silicone rubber, natural rubber and ethylene.
プ・ロピレンを含む共重合体からなる群から選ばれろと
ともにＪＩＳＡスケールで５０°息下の弾性ゴム層から
なる下層と、この下層上に必要に応じて中間層を介して
形成されるとともに有機シリコーン重合体からなる上層
とからなる多層構造としたことを特徴とする。A lower layer consisting of an elastic rubber layer selected from the group consisting of a copolymer containing propylene and a 50° angle on the JISA scale, and an organic silicone layer formed on this lower layer via an intermediate layer as necessary. It is characterized by having a multilayer structure consisting of an upper layer made of a polymer.
すなわち、本発明にかかる現像用ローラは、低硬度、高
弾性、低圧縮永久歪、可塑剤のしみ出しがない等の条件
を考慮した材料からなる下層と、トナー離型性、耐摩耗
性に優れた上層とを有する多層構造となるものである。That is, the developing roller according to the present invention has a lower layer made of a material that takes into account conditions such as low hardness, high elasticity, low compression set, and no exudation of plasticizer, and a material that has good toner releasability and abrasion resistance. It has a multilayer structure with an excellent upper layer.
なお、下層と上層との間には必要に応じて導電層等を介
在させてもよい。Note that a conductive layer or the like may be interposed between the lower layer and the upper layer as necessary.
本発明で、下層を形成する弾性ゴムは、可塑剤を含めな
いで低硬度化が可能であったり、可塑剤を添加してみて
もしみ出しにくいものであるとともに、上述したように
、高弾性、低圧縮永久歪性を有するものであゆ、ウレタ
ンゴム、シリコーンゴム、天然ゴム、イソプレンゴム並
びに、エチレン、プロピレン等の共重合体が適している
。この下層を形成する弾性ゴムの硬度は感光体との接触
面積を考慮−するとＪＩＳＡスケールで５０°以下であ
ることが必要であるが、あまり低硬度にすると上層に亀
裂が入り易（なるので好ましくないので、上層の状態を
も考慮して設定すべきである。また、この下層の電気抵
抗はトナー帯電量やバイアス効果等から１０１０Ω・傭
以下が適している。In the present invention, the elastic rubber forming the lower layer can be made to have a low hardness without containing a plasticizer, or is difficult to seep out even when a plasticizer is added, and as mentioned above, it has a high elasticity. Suitable materials having low compression set are ayu, urethane rubber, silicone rubber, natural rubber, isoprene rubber, and copolymers of ethylene, propylene, and the like. The hardness of the elastic rubber that forms this lower layer needs to be 50 degrees or less on the JISA scale considering the contact area with the photoreceptor, but if the hardness is too low, the upper layer is likely to crack, so it is preferable. Therefore, the electrical resistance of this lower layer should be set in consideration of the state of the upper layer.The electrical resistance of this lower layer is preferably 10<10 >ohm or less in view of the amount of toner charge, bias effect, etc.
一方、本発明で下層を形成する有機シリコーン重合体と
しては、シリコーンゴム、シリコーンフェス等が挙げら
れるが、上記下層を形成する弾性ゴムとの接着性、並び
に耐摩耗性、表面性、トナー離型性、作業性等を考慮す
ると、シリコーンフェス、特にメチルフェニルシリコー
ンフェス、メチルシリコーンフェス、フェニルシリコー
ンフェスが好ましい。On the other hand, examples of the organic silicone polymer forming the lower layer in the present invention include silicone rubber, silicone face, etc.; In consideration of properties, workability, etc., silicone faces, particularly methylphenyl silicone faces, methyl silicone faces, and phenyl silicone faces are preferred.
さらに、変成シリコーンゴムスであるシリコーンアルキ
ッドワニス、シリコーンポリエステルフェス、シリコー
ンアクリルフェス、シリコーンエポキシフェス、シリコ
ーンウレタンフェスなども適している。なお、上層の電
気抵抗は１０４〜１０１５Ω・（至）の範囲とするのが
よい。これは１０４Ω・帥未満では電荷が感光体にリー
クし、１０″Ω・ａｍを超えるとかぶりが発生し易く、
共に好ましくないからである。Furthermore, modified silicone rubbers such as silicone alkyd varnish, silicone polyester face, silicone acrylic face, silicone epoxy face, and silicone urethane face are also suitable. Note that the electrical resistance of the upper layer is preferably in the range of 104 to 1015 Ω. This is because if it is less than 104Ω・am, charge will leak to the photoreceptor, and if it exceeds 10″Ω・am, fogging will easily occur.
This is because both are undesirable.
また、この上層は、シリコーンゴムを用いた場合には１
論程度、シリコーンフェスを用いた場合には作業性・耐
久性を考慮すると３０〜２００声程度となるようにコー
ティングすることにより形成される。なお、コーティン
グは、例えば、スプレー、塗布等した後、焼付は等する
ことにより行えばよい。In addition, if silicone rubber is used for this upper layer, 1
In theory, if a silicone face is used, it is formed by coating to give a pitch of about 30 to 200 voices, considering workability and durability. Incidentally, the coating may be performed by, for example, spraying, applying, etc., and then baking, etc.
さらに、本願発明の現像用ローラは、トナー搬送性、画
質等の関係から、表面粗さが１５−以下であるのが好ま
しい。このような表面粗さを得るためには、上層の膜厚
が薄い場合にはその下の下層あるいは中間層の表面粗さ
を調整すればよいが、特に厚い場合にはコーテイング後
研摩することにより調整する必要がある。Further, the developing roller of the present invention preferably has a surface roughness of 15 or less in terms of toner transportability, image quality, etc. In order to obtain such surface roughness, if the upper layer is thin, the surface roughness of the lower layer or intermediate layer below it can be adjusted, but if it is particularly thick, it may be necessary to polish it after coating. Need to adjust.
く実 施 例〉
第１図に本実施例にかかる現像用ローラの側面図を示す
。同図に示すように、現像用ローラ１は芯金２上にウレ
タンゴムからなる下層３を成型するとともに、この下層
３上にメチルシリコーンフェスからなる上Ｎｊ４をコー
ティングした二層構造を有するものであり、次のように
して製造した。Embodiment FIG. 1 shows a side view of a developing roller according to this embodiment. As shown in the figure, the developing roller 1 has a two-layer structure in which a lower layer 3 made of urethane rubber is molded on a core metal 2, and an upper Nj4 made of methyl silicone face is coated on this lower layer 3. Yes, it was manufactured as follows.
まず、芯金２がセットしである金型を用意し、三洋化成
＠製のサンブレン５ＥＬ−３とサンニックスＰＰ−４０
０とを１００： １４の比率で混合したものを注入成
形し、硬度がＪＩＳＡＸケールで４０°、体積抵抗が１
０９Ω−Ｃｍのウレタンゴムからなる下ＰＪ３を成形し
た。First, prepare a mold in which the core metal 2 is set, and use Sunblen 5EL-3 manufactured by Sanyo Chemical @ and Sannix PP-40.
A mixture of 0 and 100:14 is injection molded, and the hardness is 40° on the JISAX scale and the volume resistivity is 1.
A lower PJ3 made of 09Ω-Cm urethane rubber was molded.
次に、この下層３の表面を研摩することにより表面粗さ
を１０〜２０ＩＡに調整した後、その表面にメチルシリ
コーンフェス（Ｔｉ Ｍ １ｍ抗１０１０Ω・ｃｌＴｌ
）ｉｅ約２００−の厚さにコーティングして上層４を形
成した。さらにこの上層４を厚さ１００声になるまで研
磨して表面粗さ５声前後の二層構造の現像用ローラ１を
得た。Next, after adjusting the surface roughness to 10 to 20 IA by polishing the surface of this lower layer 3, a methyl silicone face (TiM 1m anti-1010Ω・clTl
) The upper layer 4 was formed by coating to a thickness of about 200-ie. Further, this upper layer 4 was polished to a thickness of 100 tones to obtain a two-layered developing roller 1 with a surface roughness of about 5 tones.
この現像用ローラ１を実際に使用したところ、長期間使
用してもローラ表面にトナーのフィルミングが見られず
、また、ウレタンゴム製の規制部材にもほとんど摩耗が
見られなかった。また、上層４のコーテイング後の研摩
により表面粗さを５．ｍ前後としたため、トナーの搬送
性も良好であり、安定した画像が長期に亘って維持され
た。When this developing roller 1 was actually used, no toner filming was observed on the roller surface even after long-term use, and almost no wear was observed on the regulating member made of urethane rubber. In addition, the surface roughness was reduced to 5.5 by polishing after coating the upper layer 4. Since it was around m, the toner transportability was also good and a stable image was maintained over a long period of time.
〈発明の効果〉
以上、実施例とともに説明したように、本発明にかかる
現像用ローラは、トナー離型性、低圧縮歪性、耐摩耗性
が良好であるとともに可塑剤等のしみ出しも無いもので
あり、むらの少い画像を長期に亘って得ることができる
ものである。<Effects of the Invention> As explained above in conjunction with Examples, the developing roller according to the present invention has good toner releasability, low compressive strain, and abrasion resistance, and does not seep out of plasticizer, etc. It is possible to obtain images with little unevenness over a long period of time.
第１図は本発明の実施例にかかる現像用ローラの側面図
、第２図は従来の現像用ローラの使用状態を示す説明図
である。
図 面 中、
１は現像用ローラ、
２は芯金、
３は下層、
４は上層である。
第１図FIG. 1 is a side view of a developing roller according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing a conventional developing roller in use. In the drawings, 1 is a developing roller, 2 is a core metal, 3 is a lower layer, and 4 is an upper layer. Figure 1
Claims (1)
とともに該現像剤を静電潜像を保持する感光体に付着す
る非磁性一成分現像用ローラにおいて、ウレタンゴム、
シリコーンゴム、天然ゴム並びにエチレン、プロピレン
を含む共重合体からなる群から選ばれるとともにＪＩＳ
Ａスケールで５０°以下の弾性ゴム層からなる下層と、
この下層上に必要に応じて中間層を介して形成されると
ともに有機シリコーン重合体からなる上層とからなる多
層構造としたことを特徴とする非磁性一成分現像用ロー
ラ。 ２）下層は体積抵抗が１０＾１＾０Ω・ｃｍ以下である
とともに上層は膜厚が１ｍｍ以下、体積抵抗が１０＾４
〜１０＾１＾５Ω・ｃｍであり、表面粗さが１５μｍ以
下あることを特徴とする特許請求の範囲第１項記載の非
磁性一成分現像用ローラ。[Scope of Claims] 1) In a non-magnetic one-component developing roller that holds a non-magnetic one-component developer in the form of a thin film on its peripheral surface and adheres the developer to a photoreceptor that holds an electrostatic latent image. , urethane rubber,
Selected from the group consisting of silicone rubber, natural rubber, and copolymers containing ethylene and propylene, and JIS
a lower layer consisting of an elastic rubber layer with an angle of 50° or less on the A scale;
A non-magnetic one-component developing roller characterized in that it has a multilayer structure consisting of an upper layer formed of an organic silicone polymer and an intermediate layer formed on the lower layer if necessary. 2) The lower layer has a volume resistance of 10^1^0 Ω・cm or less, and the upper layer has a film thickness of 1 mm or less and a volume resistivity of 10^4.
The non-magnetic one-component developing roller according to claim 1, wherein the non-magnetic one-component developing roller has a surface roughness of 15 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63009742A JPH01186981A (en) | 1988-01-21 | 1988-01-21 | Roller for nonmagnetic one-component development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63009742A JPH01186981A (en) | 1988-01-21 | 1988-01-21 | Roller for nonmagnetic one-component development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01186981A true JPH01186981A (en) | 1989-07-26 |
Family
ID=11728762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63009742A Pending JPH01186981A (en) | 1988-01-21 | 1988-01-21 | Roller for nonmagnetic one-component development |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01186981A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580650A (en) * | 1991-09-24 | 1993-04-02 | Tokai Rubber Ind Ltd | Composite roll |
| JPH07261542A (en) * | 1993-03-29 | 1995-10-13 | Bridgestone Corp | Developing roller and developing device |
| JP2007051000A (en) * | 2005-08-19 | 2007-03-01 | Hokushin Ind Inc | Roll for feeding, carrying, and separating paper and its manufacturing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223469A (en) * | 1983-06-03 | 1984-12-15 | Fuji Xerox Co Ltd | Developing device |
| JPS63189876A (en) * | 1987-02-02 | 1988-08-05 | Ricoh Co Ltd | Urethane rubber developing roll with intermediate resistance |
| JPH01124881A (en) * | 1987-11-09 | 1989-05-17 | Ricoh Co Ltd | Developing member for electrostatic latent image |
-
1988
- 1988-01-21 JP JP63009742A patent/JPH01186981A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223469A (en) * | 1983-06-03 | 1984-12-15 | Fuji Xerox Co Ltd | Developing device |
| JPS63189876A (en) * | 1987-02-02 | 1988-08-05 | Ricoh Co Ltd | Urethane rubber developing roll with intermediate resistance |
| JPH01124881A (en) * | 1987-11-09 | 1989-05-17 | Ricoh Co Ltd | Developing member for electrostatic latent image |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0580650A (en) * | 1991-09-24 | 1993-04-02 | Tokai Rubber Ind Ltd | Composite roll |
| JPH07261542A (en) * | 1993-03-29 | 1995-10-13 | Bridgestone Corp | Developing roller and developing device |
| JP2007051000A (en) * | 2005-08-19 | 2007-03-01 | Hokushin Ind Inc | Roll for feeding, carrying, and separating paper and its manufacturing method |
| JP4570093B2 (en) * | 2005-08-19 | 2010-10-27 | シンジーテック株式会社 | Paper feeding / conveying separation roll and manufacturing method thereof |
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