JP2006089625A - Oleo-resin composition and oleo-resin bearing - Google Patents
Oleo-resin composition and oleo-resin bearing Download PDFInfo
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Abstract
Description
本発明は、含油樹脂組成物及び含油樹脂軸受に関するものである。特に、複写機、プリンター、ファクシミリ等の電子写真装置のトナー粉末の介在する部位に設置される摺動部材に用いられる含油樹脂軸受及びその軸受の含油樹脂組成物に関するものである。 The present invention relates to an oil-containing resin composition and an oil-containing resin bearing. In particular, the present invention relates to an oil-impregnated resin bearing used for a sliding member installed in a portion where toner powder is interposed in an electrophotographic apparatus such as a copying machine, a printer, and a facsimile machine, and an oil-impregnated resin composition of the bearing.
トナーを用いる電子写真装置の可動部の支持摺動部材として、軽量コンパクト化及び注油等の保守点検の簡略化を目的として、摩擦係数の低いいわゆる自己潤滑性エンジニアリングプラスチックにより成形された無給油の軸受が広く使用されている。
本出願人は、このような軸受の研究開発を継続して実施していて、特許文献１（特許第２６２４４４２号公報）に開示された発明、特許文献２（特許第３０２９０２９号公報）に開示された発明などを提案してきた。
特許文献１では、１〜２５容積％の潤滑油と該潤滑油担体としての０．２〜１５容積％のスチレンブタジエン系共重合体を、スチレンブタジエン系共重合体１容量に対して潤滑油２容量以下で混合してゼリー状物を得、該ゼリー状物に成形用合成樹脂粉末を混合した後、押出成形によりペレット化する含油樹脂組成物の製造方法を提案した。
特許文献２では、潤滑油、潤滑油担体、補強充填材及び自己潤滑性樹脂を含む含油樹脂組成物において、この補強充填材として酸化亜鉛ウィスカーを０．５容積％以上４０容積％以下含有することを特徴とする含油樹脂組成物、及び、この組成物を用いた電子写真装置におけるトナー粉末の介在する部位に設置される含油樹脂軸受を提案した。この発明は、潤滑油担体としてのポリノルボルネン系エラストマーと潤滑油を混合し、両者が均一に相溶した泥状の混合物を得た後、自己潤滑性樹脂、補強充填材を添加し、押出成形により、含油樹脂組成物を得ていた。
これら先行提案技術で用いられる潤滑油担体は、いずれにおいても、吸油前は粉末状の材料であるが、潤滑油・潤滑油担体の混合物は、特許文献１では「ゼリー状物」、特許文献２では「泥状の混合物」と表現されるように、その性状は凝集した塊状物となっていた。このため、自己潤滑性樹脂粉末や補強充填材との混合工程において、分散不良を生じやすく、品質が不安定になる問題点があった。混合物の分散不良は、含油樹脂軸受を成形した際に、成形品の表面層の剥離、カケ、表面粗さの増大といった原因となり、軸受の性能面においては、耐摩耗性の低下の要因となっていた。
Non-lubricated bearings made of so-called self-lubricating engineering plastics with a low coefficient of friction as support and sliding members for moving parts of electrophotographic devices that use toner, for the purpose of light weight compactness and simplification of maintenance and inspection such as lubrication Is widely used.
The present applicant has been continuously researching and developing such a bearing, and is disclosed in Patent Document 1 (Patent No. 2624442), Patent Document 2 (Patent No. 3029029). Have proposed various inventions.
In Patent Document 1, 1 to 25% by volume of a lubricating oil and 0.2 to 15% by volume of a styrene butadiene copolymer as the lubricating oil carrier are mixed with 2 lubricants per 1 volume of the styrene butadiene copolymer. A method for producing an oil-containing resin composition was proposed in which a jelly-like product was obtained by mixing below the capacity, and the synthetic resin powder for molding was mixed with the jelly-like product and then pelletized by extrusion molding.
In Patent Document 2, in an oil-containing resin composition containing a lubricating oil, a lubricating oil carrier, a reinforcing filler, and a self-lubricating resin, zinc reinforcing whisker is contained in an amount of 0.5% by volume to 40% by volume as the reinforcing filler. And an oil-impregnated resin bearing installed in a portion where toner powder intervenes in an electrophotographic apparatus using the composition. This invention mixes a polynorbornene elastomer as a lubricating oil carrier and a lubricating oil, and after obtaining a mud mixture in which both are uniformly compatible, a self-lubricating resin and a reinforcing filler are added, and extrusion molding is performed. Thus, an oil-containing resin composition was obtained.
The lubricating oil carrier used in these prior proposal techniques is a powdery material before oil absorption, but the mixture of lubricating oil and lubricating oil carrier is “jelly-like” in Patent Document 1, and Patent Document 2 Then, as expressed as “a mud-like mixture”, the property was an aggregated mass. For this reason, in the mixing process with the self-lubricating resin powder and the reinforcing filler, there is a problem that the dispersion is liable to occur and the quality becomes unstable. The poor dispersion of the mixture causes peeling of the surface layer of the molded product, chipping and an increase in surface roughness when molding an oil-impregnated resin bearing, and causes a decrease in wear resistance in terms of bearing performance. It was.
凝集した塊状物とならない潤滑油・潤滑油担体の混合物を製造し、合成樹脂粉末や補強充填材との混合工程において、分散不良が発生せず、安定した品質の含油軸受を提供することを目的とする。 The purpose is to produce a mixture of lubricating oil and lubricating oil carrier that does not become agglomerated lump, and to provide a stable quality oil-impregnated bearing that does not cause poor dispersion in the mixing process with synthetic resin powder and reinforcing filler And
本発明者は、鋭意研究開発を続けた結果、潤滑油担体として特定のスチレン・ブタジエン・ラジアルテレブロック共重合体を用いることにより、問題点を解決できることを見出した。
本発明の主な構成はつぎのとおりである。
As a result of continuous research and development, the present inventor has found that the problem can be solved by using a specific styrene-butadiene-radial teleblock copolymer as a lubricating oil carrier.
The main configuration of the present invention is as follows.
（１）潤滑油、潤滑油担体、補強充填材及び自己潤滑性樹脂を含む含油樹脂組成物において、この潤滑油担体としてスチレン/ブタジエン重量比が25/75〜35/65、MFR（G）[200℃、5kg]が1g/10min以下、25重量％トルエン溶液粘度が20000cps以上の、スチレン・ブタジエン・ラジアルテレブロック共重合体を全含油樹脂組成物中に10〜15容積％含有し、この潤滑油担体1容量に対し、潤滑油1.5〜２容量を含有することを特徴とする含油樹脂組成物。
（２）補強充填材が酸化亜鉛ウィスカー及び／又は金属粉末であることを特徴とする（１）記載の含油樹脂組成物。
（３） 電子写真装置におけるトナー粉末の介在する部位に設置される含油樹脂軸受であって、（１）又は（２）記載の含油樹脂組成物が成形材料として用いられていることを特徴とする含油樹脂軸受。
（４） 潤滑油担体として、スチレン/ブタジエン重量比が25/75〜35/65、MFR（G）[200℃、5kg]が1g/10min以下、25重量％トルエン溶液粘度が20000cps以上の、スチレン・ブタジエン・ラジアルテレブロック共重合体を全含油樹脂組成物中10〜15容積％用い、この潤滑油担体１容量に対し、潤滑油1.5〜２容量を混合して粉末状の混合物となし、該粉末状混合物に自己潤滑性樹脂と補強充填材とを添加混合することを特徴とする含油樹脂組成物を製造する方法。
（５） 潤滑油担体として、スチレン/ブタジエン重量比が25/75〜35/65、MFR（G）[200℃、5kg]が1g/10min以下、25重量％トルエン溶液粘度が20000cps以上の、スチレン・ブタジエン・ラジアルテレブロック共重合体を全含油樹脂組成物中10〜15容積％用い、この潤滑油担体１容量に対し、潤滑油1.5〜２容量を混合して粉末状の混合物となし、該粉末状混合物に自己潤滑性樹脂と補強充填材とを添加混合して含油樹脂組成物となし、該含油樹脂組成物を２軸混錬押出機によりぺレット化し、該ペレットを射出成形して含油樹脂軸受を製造する方法。
(1) In an oil-containing resin composition containing a lubricating oil, a lubricating oil carrier, a reinforcing filler, and a self-lubricating resin, the lubricating oil carrier has a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [ This oil contains 10-15% by volume of styrene / butadiene / radial teleblock copolymer with a viscosity of 200g, 5kg] 1g / 10min or less, and a 25 wt% toluene solution viscosity of 20000cps or more. An oil-containing resin composition comprising 1.5 to 2 volumes of lubricating oil per 1 volume of oil carrier.
(2) The oil-containing resin composition according to (1), wherein the reinforcing filler is zinc oxide whisker and / or metal powder.
(3) An oil-impregnated resin bearing installed in a portion where toner powder is interposed in an electrophotographic apparatus, wherein the oil-containing resin composition described in (1) or (2) is used as a molding material. Oil-impregnated resin bearing.
(4) As a lubricating oil carrier, styrene having a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [200 ° C., 5 kg] of 1 g / 10 min or less, and a 25 wt% toluene solution viscosity of 20000 cps or more. A butadiene-radial teleblock copolymer is used in an amount of 10 to 15% by volume in the total oil-containing resin composition, and 1 to 2 volumes of this lubricating oil carrier is mixed with 1.5 to 2 volumes of lubricating oil to form a powdery mixture, A method for producing an oil-containing resin composition, wherein a self-lubricating resin and a reinforcing filler are added to and mixed with a powdery mixture.
(5) As a lubricating oil carrier, styrene having a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [200 ° C., 5 kg] of 1 g / 10 min or less, and a 25 wt% toluene solution viscosity of 20000 cps or more. A butadiene-radial teleblock copolymer is used in an amount of 10 to 15% by volume in the total oil-containing resin composition, and 1 to 2 volumes of this lubricating oil carrier is mixed with 1.5 to 2 volumes of lubricating oil to form a powdery mixture, A self-lubricating resin and a reinforcing filler are added to and mixed with the powdered mixture to form an oil-containing resin composition. The oil-containing resin composition is pelletized with a twin-screw kneading extruder, and the pellets are injection-molded to form an oil-containing material. A method of manufacturing a resin bearing.
潤滑油担体として、スチレン/ブタジエン重量比が25/75〜35/65、MFR（G）[200℃、5kg]が1g/10min以下、25重量％トルエン溶液粘度が20000cps以上の、スチレン・ブタジエン・ラジアルテレブロック共重合体を用いることにより、この潤滑油担体１容量に対し、潤滑油1.5〜２容量を含有する混合物は、粒子同士が凝集することなく粉末状を保持することができた。
これにより、混合工程における分散が良好となるために、内部組成が均一な含油樹脂軸受成形品を得ることができた。
これによって、表面状態が良好となり、耐摩耗性にも優れた含油樹脂軸受成形品を得ることができた。
As a lubricating oil carrier, a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [200 ° C., 5 kg] is 1 g / 10 min or less, and a 25 wt% toluene solution viscosity is 20000 cps or more. By using the radial teleblock copolymer, the mixture containing 1.5 to 2 volumes of the lubricating oil with respect to 1 volume of the lubricating oil carrier was able to maintain a powder form without aggregation of particles.
Thereby, since the dispersion | distribution in a mixing process became favorable, the oil-impregnated resin bearing molded product with a uniform internal composition was able to be obtained.
As a result, an oil-impregnated resin bearing molded product having a good surface condition and excellent wear resistance could be obtained.
潤滑油担体として、スチレン/ブタジエン重量比が25/75〜35/65、MFR（G）[200℃、5kg]が1g/10min以下、25重量％トルエン溶液粘度が20000cps以上の、スチレン・ブタジエン・ラジアルテレブロック共重合体を用いる。
潤滑油は、潤滑油担体１容量に対し、潤滑油1.5〜２容量を用いる。
この潤滑油担体と潤滑油の混合物は、粒子同士が凝集することなく粉末状を保持する。
この潤滑油担体と潤滑油の混合粉末と自己潤滑性樹脂と補強充填材を添加混合すると、混合工程における分散が良好となるために、内部組成が均一な含油樹脂軸受成形品を得ることが出来る。
As a lubricating oil carrier, a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [200 ° C., 5 kg] is 1 g / 10 min or less, and a 25 wt% toluene solution viscosity is 20000 cps or more. A radial teleblock copolymer is used.
The lubricating oil uses 1.5 to 2 volumes of lubricating oil for 1 volume of lubricating oil carrier.
The mixture of the lubricating oil carrier and the lubricating oil maintains a powder form without aggregation of particles.
When this mixed powder of lubricating oil carrier and lubricating oil, self-lubricating resin, and reinforcing filler are added and mixed, dispersion in the mixing process is improved, so that an oil-impregnated resin bearing molded product having a uniform internal composition can be obtained. .
＜潤滑油担体＞
潤滑油担体は、スチレン/ブタジエン重量比が25/75〜35/65、MFR（G）[200℃、5kg]が1g/10min以下、25重量％トルエン溶液粘度が20000cps以上の、スチレン・ブタジエン・ラジアルテレブロック共重合体を用いる。このスチレン・ブタジエン・ラジアルテレブロック共重合体の例として、旭化成株式会社製 商品名「アサプレンT-411G」が挙げられる。
<Lubricant carrier>
The lubricating oil carrier has a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [200 ° C., 5 kg] of 1 g / 10 min or less, and 25 wt% toluene solution viscosity of 20000 cps or more. A radial teleblock copolymer is used. As an example of this styrene / butadiene / radial teleblock copolymer, trade name “Asaprene T-411G” manufactured by Asahi Kasei Co., Ltd. may be mentioned.
スチレン・ブタジエン・ラジアルテレブロック共重合体は、ポリスチレンをハードセグメント、ポリブタジエンをソフトセグメントとするスチレン・ブタジエン系熱可塑性エラストマーである。この構造モデルの想定を図５に示す。低温及び常温ではゴム弾性を有し、高温では流動性を示す素材である。 The styrene / butadiene / radial teleblock copolymer is a styrene / butadiene thermoplastic elastomer having polystyrene as a hard segment and polybutadiene as a soft segment. The assumption of this structural model is shown in FIG. It is a material that has rubber elasticity at low and normal temperatures and exhibits fluidity at high temperatures.
25重量％トルエン溶液粘度が20000cps以上は、潤滑油の給油状態が良好な範囲であり、22000cpsまで用いられている
潤滑油担体は、潤滑油を吸収し、含油樹脂軸受中に潤滑油を多量に含有させることができ、しかも摺動面への潤滑油の滲出量を安定化させることができるようになる。潤滑油の給油試験でも示すように、25重量％トルエン溶液粘度＝20200cpsは、25重量％トルエン溶液粘度＝7500 cpsに比べて多量の潤滑油を含浸できる。
When the viscosity of the 25 wt% toluene solution is 20000 cps or more, the lubricating oil is in a good range. The lubricating oil carrier used up to 22000 cps absorbs the lubricating oil, and a large amount of lubricating oil is contained in the oil-impregnated resin bearing. In addition, it is possible to stabilize the amount of lubricating oil oozed onto the sliding surface. As shown in the lubricating oil supply test, 25 wt% toluene solution viscosity = 20200 cps can impregnate a larger amount of lubricating oil than 25 wt% toluene solution viscosity = 7500 cps.
MFR（G）[200℃、5kg]が1g/10min以下という数値は、スチレン・ブタジエン共重合体の中でも、ラジアルテレブロック構造のものが特に高分子量であることを示しており、このことが潤滑油を多量に含浸できる一要因である。本発明に適したスチレン／ブタジエン重量比は20/80〜40/60であり、25/75〜35/65が特に好ましい。 The numerical value of MFR (G) [200 ° C, 5kg] of 1g / 10min or less indicates that among styrene / butadiene copolymers, the radial teleblock structure has a particularly high molecular weight. It is one factor that can impregnate a large amount of oil. Suitable styrene / butadiene weight ratios for the present invention are 20/80 to 40/60, with 25/75 to 35/65 being particularly preferred.
＜潤滑油＞
潤滑油としては、一般的に潤滑油として使用されているものが使用できる。例えば（ａ）スピンドル油、タービン油、マシン油、ダイナモ油等の芳香属系潤滑油、（ｂ）ナフテン系潤滑油、（ｃ）パラフィン系潤滑油、（ｄ）炭化水素、エステル、ポリグリコール、シリコーン等の合成油等が挙げられる。
潤滑油の配合量は、用いられる含油樹脂組成物１００容積％に対し１５容積％以上３０容積％以下が好ましい。配合量が上記範囲未満であると、滑り摩擦抵抗を十分に低下させることができなくなってしまうことがある。逆に、配合量が上記範囲を超えると、摺動部分に過剰の潤滑油が滲出して摺動面に介在するトナー等の微粉末が固まりやすくなり、摺動抵抗が増大してしまうことがある。
<Lubricating oil>
As lubricating oil, what is generally used as lubricating oil can be used. For example, (a) aromatic lubricating oil such as spindle oil, turbine oil, machine oil, dynamo oil, (b) naphthenic lubricating oil, (c) paraffinic lubricating oil, (d) hydrocarbon, ester, polyglycol, Examples include synthetic oils such as silicone.
The blending amount of the lubricating oil is preferably 15% by volume or more and 30% by volume or less with respect to 100% by volume of the oil-containing resin composition used. If the blending amount is less than the above range, the sliding frictional resistance may not be sufficiently reduced. On the other hand, if the blending amount exceeds the above range, excessive lubricating oil oozes out on the sliding part, and the fine powder such as toner intervening on the sliding surface tends to harden, and the sliding resistance may increase. is there.
＜補強充填材＞
補強充填材として酸化亜鉛ウィスカーが例示できる。補強充填材が補強作用を発現し、含油樹脂軸受の機械的性質を向上させることができる。
酸化亜鉛ウィスカーは、摺動部分の平滑性を悪化させることがなく、一般的な強化繊維や補強充填材と比較して含油樹脂軸受の表面硬度をさほど上昇させないので、トナー等の微粉末の侵入による摺動抵抗増大を防止する機能を保持することができる。上記摺動部分の平滑性、機械的性質の向上等の作用を効果的に奏させるためには、酸化亜鉛ウィスカーの含有量を０．５容積％以上２０容積％以下にするとよい。
酸化亜鉛ウィスカーとしては、繊維長が２μｍ以上５０μｍ以下であり、繊維径が０．２μｍ以上３μｍ以下であるものが好適に用いられる。
補強充填材として酸化亜鉛ウィスカーと金属粉末とを併用し、この酸化亜鉛ウィスカーと金属粉末との容積比を４／６以上６／４以下とすれば、含油樹脂軸受の熱伝導性及び寸法安定性を向上させることができる。
補強効果と摺動抵抗増大防止効果とを両立させるには、補強充填材の含有率を含油樹脂組成物１００容積％に対して０．５容積％以上２０容積％以下とするのが好ましい。
<Reinforcing filler>
A zinc oxide whisker can be exemplified as the reinforcing filler. The reinforcing filler exhibits a reinforcing action and can improve the mechanical properties of the oil-impregnated resin bearing.
Zinc oxide whiskers do not deteriorate the smoothness of sliding parts, and do not increase the surface hardness of oil-impregnated resin bearings compared to general reinforcing fibers and reinforcing fillers. It is possible to maintain the function of preventing an increase in sliding resistance due to. In order to effectively exhibit the smoothness and mechanical properties of the sliding part, the content of zinc oxide whiskers is preferably 0.5% by volume or more and 20% by volume or less.
As the zinc oxide whisker, those having a fiber length of 2 μm to 50 μm and a fiber diameter of 0.2 μm to 3 μm are preferably used.
If zinc oxide whisker and metal powder are used in combination as a reinforcing filler, and the volume ratio of zinc oxide whisker and metal powder is 4/6 or more and 6/4 or less, the thermal conductivity and dimensional stability of the oil-impregnated resin bearing Can be improved.
In order to achieve both the reinforcing effect and the sliding resistance increase preventing effect, the content of the reinforcing filler is preferably 0.5% by volume or more and 20% by volume or less with respect to 100% by volume of the oil-containing resin composition.
金属粉末としては、例えば耐摩耗性に優れる青銅、りん青銅、ホワイトメタル、鉛青銅、ケルメット（銅鉛合金）等の銅系金属等が挙げられる。
酸化亜鉛ウィスカーと金属粉末とを併用する場合、その容積比は４／６以上６／４以下が好ましい。容積比が上記範囲未満であると、摺動部分２の表面平滑性が損なわれてしまうことがある。逆に、容積比が上記範囲を超えると、含油樹脂軸受の熱伝導性及び寸法安定性が低下してしまうことがある。
Examples of the metal powder include copper-based metals such as bronze, phosphor bronze, white metal, lead bronze, and cermet (copper lead alloy) that are excellent in wear resistance.
When the zinc oxide whisker and the metal powder are used in combination, the volume ratio is preferably 4/6 or more and 6/4 or less. If the volume ratio is less than the above range, the surface smoothness of the sliding portion 2 may be impaired. On the other hand, when the volume ratio exceeds the above range, the thermal conductivity and dimensional stability of the oil-impregnated resin bearing may be lowered.
これら補強充填材の合計含有率は、用いられる含油樹脂組成物１００容積％に対して０．５容積％以上２０容積％以下が好ましく、５容積％以上１５容積％以下が特に好ましい。含有率が上記範囲未満であると、含油樹脂軸受１の強度が不十分となったり熱伝導性が低下したりしてしまうことがある。逆に、含有率が上記範囲を超えると、含油樹脂軸受１が脆化したり摺動部分２の表面平滑性が低下したりしてしまうことがある。 The total content of these reinforcing fillers is preferably 0.5% by volume or more and 20% by volume or less, and particularly preferably 5% by volume or more and 15% by volume or less with respect to 100% by volume of the oil-containing resin composition used. If the content is less than the above range, the strength of the oil-impregnated resin bearing 1 may be insufficient or the thermal conductivity may be reduced. On the other hand, if the content exceeds the above range, the oil-containing resin bearing 1 may become brittle or the surface smoothness of the sliding portion 2 may decrease.
＜自己潤滑性樹脂＞
自己潤滑性樹脂とは、固体状又は液状の潤滑剤を添加しない状態でも潤滑性を有し、比較的低い摩擦係数を示す樹脂のことである。自己潤滑性樹脂としては、上記のポリアセタールの他に、例えばポリエチレンやポリプロピレン等のポリオレフィン系樹脂、ポリアミド、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリテトラフルオロエチレン等が挙げられる。
含油樹脂組成物中に占める自己潤滑性樹脂の量は、３５容積％以上７５容積％以下が好ましく、４０容積％以上７０容積％以下が特に好ましい。自己潤滑性樹脂の量が上記範囲未満であると、摺動部材として必要な機械的強度が低下し、摩耗量が増大してしまうことがある。逆に、自己潤滑性樹脂の量が上記範囲を越えると、含油樹脂組成物の硬度が上昇し、トナー等の微粉末の侵入により摺動抵抗が増大してしまうことがある。
<Self-lubricating resin>
The self-lubricating resin is a resin that has lubricity even in a state where no solid or liquid lubricant is added and exhibits a relatively low coefficient of friction. Examples of the self-lubricating resin include polyolefin resins such as polyethylene and polypropylene, polyamide, polyethylene terephthalate, polybutylene terephthalate, and polytetrafluoroethylene in addition to the polyacetal described above.
The amount of the self-lubricating resin in the oil-containing resin composition is preferably 35% to 75% by volume, particularly preferably 40% to 70% by volume. If the amount of the self-lubricating resin is less than the above range, the mechanical strength required for the sliding member may be reduced, and the amount of wear may be increased. On the other hand, when the amount of the self-lubricating resin exceeds the above range, the hardness of the oil-containing resin composition increases, and sliding resistance may increase due to intrusion of fine powder such as toner.
＜その他充填材等＞
この含油樹脂軸受に用いられる含油樹脂組成物には、潤滑油、潤滑油担体、補強充填材及び自己潤滑性樹脂の他にも、必要に応じ、例えば紫外線吸収剤、劣化防止剤、着色剤、帯電防止剤、難燃剤等を配合することができる。
<Other fillers>
In addition to the lubricating oil, the lubricating oil carrier, the reinforcing filler and the self-lubricating resin, the oil-containing resin composition used for the oil-containing resin bearing includes, for example, an ultraviolet absorber, a deterioration preventing agent, a colorant, An antistatic agent, a flame retardant, etc. can be mix | blended.
＜製造工程＞
この含油樹脂軸受に用いられる含油樹脂組成物は、例えば潤滑油担体と潤滑油とを混合して両者が均一に混合した粉末状を調製し、これに粉末状の自己潤滑性樹脂と酸化亜鉛ウィスカー及び又は／金属粉末を添加して混合することにより得られる。この含油樹脂組成物から含油樹脂軸受を成形するに際しては既知の種々の成形方法を採用することができるが、ペレット化し、このペレットを一般的には射出成形する方法が採用される。
<Manufacturing process>
The oil-impregnated resin composition used in the oil-impregnated resin bearing is prepared, for example, by mixing a lubricating oil carrier and a lubricating oil to prepare a powder form in which both are uniformly mixed, and to this, a powdered self-lubricating resin and a zinc oxide whisker are prepared. And / or by adding and mixing metal powder. When molding an oil-impregnated resin bearing from the oil-containing resin composition, various known molding methods can be employed, but a method of pelletizing and generally injection molding the pellet is employed.
こうして得られる含油樹脂軸受の摺動部分の摩擦係数は０．２０以下となり、限界ＰＶ値は４．５ｋｇｆ／ｃｍ2・ｍ／ｓｅｃ以上となり、好ましい。 The friction coefficient of the sliding part of the oil-impregnated resin bearing obtained in this way is preferably 0.20 or less, and the limit PV value is 4.5 kgf / cm 2 · m / sec or more, which is preferable.
＜性能、用途＞
本発明の含油合成樹脂組成物は、含油量が増加し、粉末状であるため均一な混合ができ、成形した軸受も均一な材質であり、摺動抵抗が小さく、耐摩耗性が向上し、耐久性も向上する。
この含油樹脂軸受摩擦係数は、０．２０以下が好ましく、０．１５以下が特に好ましい。摩擦係数が上記範囲を超えると、軸材の摩耗の程度が大きくなってしまうことがある。
摩擦係数は小さいほど好ましいので、本発明では摩擦係数の下限は特には設けていない。
なお、ここで摩擦係数とは、ＳＵＳ３０３材に対する、面圧１０ｋｇｆ／ｃｍ2、滑り速度０．２ｍ／ｓｅｃにおける摩擦係数を意味する。
この含油樹脂軸受の摺動部分の限界ＰＶ値は、４．５ｋｇｆ／ｃｍ2・ｍ／ｓｅｃ以上が好ましく、５．５ｋｇｆ／ｃｍ2・ｍ／ｓｅｃ以上が特に好ましい。限界ＰＶ値が上記範囲未満であると、高負荷・高速条件において摺動部分２が摩擦熱により溶融してしまうことがある。限界ＰＶ値は大きいほど好ましいので、本発明では限界ＰＶ値の上限は特には設けていないが、一般的に得られる限界ＰＶ値の上限は１０ｋｇｆ／ｃｍ2・ｍ／ｓｅｃ程度である。なお、ここで限界ＰＶ値とは、摩擦熱によって摺動部分２が溶融して摩擦係数及び摩耗が急増する地点での荷重Ｐと速度Ｖとの積を意味する。
本発明の含油樹脂組成物を利用して成形した含油樹脂軸受は、特に、複写機、プリンター、ファクシミリ等の電子写真装置のトナー粉末が介在する部位に設置される摺動部材に用いられる。
<Performance and usage>
The oil-containing synthetic resin composition of the present invention has an increased oil content and can be uniformly mixed because it is in powder form, the molded bearing is also a uniform material, has low sliding resistance, and improved wear resistance. Durability is also improved.
The oil-impregnated resin bearing friction coefficient is preferably 0.20 or less, and particularly preferably 0.15 or less. When the friction coefficient exceeds the above range, the degree of wear of the shaft material may increase.
Since the smaller the friction coefficient is, the lower the friction coefficient is not particularly provided in the present invention.
Here, the coefficient of friction means a coefficient of friction with respect to SUS303 material at a surface pressure of 10 kgf / cm 2 and a sliding speed of 0.2 m / sec.
The limit PV value of the sliding portion of the oleoresin bearing is preferably at least 4.5kgf / cm 2 · m / sec , 5.5kgf / cm 2 · m / sec or more is particularly preferable. If the limit PV value is less than the above range, the sliding portion 2 may melt due to frictional heat under high load / high speed conditions. Since the limit PV value is preferably as large as possible, the upper limit of the limit PV value is not particularly set in the present invention, but the upper limit of the limit PV value that is generally obtained is about 10 kgf / cm 2 · m / sec. Here, the limit PV value means the product of the load P and the speed V at a point where the sliding portion 2 melts due to frictional heat and the friction coefficient and wear increase rapidly.
The oil-impregnated resin bearing molded using the oil-impregnated resin composition of the present invention is particularly used for a sliding member installed at a site where toner powder is interposed in an electrophotographic apparatus such as a copying machine, a printer, and a facsimile machine.
潤滑油担体としてのスチレン・ブタジエンラジアルテレブロック共重合体（旭化成株式会社製 商品名「アサプレンT-411G」12・5容積％と、潤滑油としての鉱物油（出光石油株式会社製 商品名「ダフニースーパーメカニックオイル100」21.3容積％とをヘンシェルミキサーで混合し、70℃で24時間熟成させた。この混合物は粉末状を呈している。
この後、自己潤滑性樹脂としてのポリアセタール樹脂粉末（ポリプラスチックス株式会社製 商品名「ジュラコンＭ90-00」56・2容積％と補強充填材としての酸化亜鉛ウィスカー（松下産業情報機器株式会社製 商品名「パナテトラWZ-0531」10.0溶積％とを添加し、再びヘンシェルミキサーで混合して、含油樹脂組成物を得た。
これを2軸混錬押出機により押し出して裁断し、樹脂ペレットを得た。この樹脂ペレットを射出成形にて含油樹脂軸受を得た。
製造された含油樹脂軸受の形状は、外径が１２ｍｍ、内径が６ｍｍ、長さが４ｍｍである含油樹脂軸受を得た。
Styrene-butadiene radial teleblock copolymer as a lubricant carrier (trade name “Asaprene T-411G” manufactured by Asahi Kasei Co., Ltd., 12.5% by volume and mineral oil as a lubricant (product name “Dafney” manufactured by Idemitsu Oil Co., Ltd.) Supermechanical oil 100 ”21.3% by volume was mixed with a Henschel mixer and aged for 24 hours at 70 ° C. This mixture is in the form of a powder.
After this, polyacetal resin powder as a self-lubricating resin (trade name “Duracon M90-00” 56.2% by volume made by Polyplastics Co., Ltd.) and zinc oxide whisker as a reinforcing filler (made by Matsushita Sangyo Information Equipment Co., Ltd. The name “Panatetra WZ-0531” 10.0% melt was added and mixed again with a Henschel mixer to obtain an oil-containing resin composition.
This was extruded and cut by a twin-screw kneading extruder to obtain resin pellets. An oil-impregnated resin bearing was obtained by injection molding of this resin pellet.
The shape of the manufactured oil-impregnated resin bearing was an oil-impregnated resin bearing having an outer diameter of 12 mm, an inner diameter of 6 mm, and a length of 4 mm.
潤滑油担体としてのスチレン・ブタジエンラジアルテレブロック共重合体（旭化成株式会社製 商品名「アサプレンT-411G」８．６容積％、潤滑油としての鉱物油（出光石油株式会社製 商品名「ダフニースーパーメカニックオイル100」１６．５容積％、自己潤滑性樹脂としてのポリアセタール樹脂粉末（ポリプラスチックス株式会社製 商品名「ジュラコンＭ90-00」６４．３容積％、補強充填材としての酸化亜鉛ウィスカー（松下産業情報機器株式会社製 商品名「パナテトラWZ-0531」８．７容積％、着色顔料１．９容積％とを用いて、実施例１と同様に含油軸受を製造した。 Styrene-butadiene radial teleblock copolymer as a lubricant carrier (trade name “Asaprene T-411G” manufactured by Asahi Kasei Co., Ltd., 8.6% by volume, mineral oil as a lubricant (trade name “Dafney Super” manufactured by Idemitsu Sekiyu Co., Ltd.) Mechanic oil 100 ”16.5% by volume, polyacetal resin powder as self-lubricating resin (trade name“ Duracon M90-00 ”64.3% by volume made by Polyplastics Co., Ltd., zinc oxide whisker as reinforcing filler (Matsushita) An oil-impregnated bearing was produced in the same manner as in Example 1 using 8.7% by volume of the trade name “Panatetra WZ-0531” manufactured by Industrial Information Equipment Co., Ltd. and 1.9% by volume of the color pigment.
［比較例１］
潤滑油担体としてのスチレン・ブタジエンブロック共重合体（KFトレーディング株式会社製 商品名「ロングクリンS-101」12・5容積％と、潤滑油としての鉱物油（出光石油株式会社製 商品名「ダフニースーパーメカニックオイル100」21.3容積％とをヘンシェルミキサーで混合し、70℃で24時間熟成させた。この混合物はゼリー状を呈している。この後、自己潤滑性樹脂としてのポリアセタール樹脂粉末（ポリプラスチックス株式会社製 商品名「ジュラコンＭ90-00」56・2容積％と補強充填材としての酸化亜鉛ウィスカー（松下産業情報機器株式会社製 商品名「パナテトラWZ-0531」10.0溶積％とを添加し、再びヘンシェルミキサーで混合して、含油樹脂組成物を得た。
これを2軸混錬押出機によりペレット化し、射出成形にて含油樹脂軸受を得た。
含油樹脂軸受の形状は実施例１と同じである。
[Comparative Example 1]
Styrene / butadiene block copolymer as lubricant carrier (trade name “Longclin S-101” manufactured by KF Trading Co., Ltd. 12.5% by volume and mineral oil as lubricant (trade name “Dafney” manufactured by Idemitsu Oil Co., Ltd.) Supermechanical oil 100 "21.3% by volume was mixed with a Henschel mixer and aged for 24 hours at 70 ° C. This mixture was in the form of a jelly.After this, polyacetal resin powder (polyplastics as self-lubricating resin) The product name “Duracon M90-00” 56.2% by volume and Zinc Oxide Whisker (Matsushita Sangyo Information Equipment Co., Ltd. product name “Panatetra WZ-0531” 10.0% molten metal added as a reinforcing filler are added. The oil-containing resin composition was obtained by mixing again with a Henschel mixer.
This was pelletized by a twin-screw kneading extruder and an oil-impregnated resin bearing was obtained by injection molding.
The shape of the oil-impregnated resin bearing is the same as in Example 1.
［比較例２］
潤滑油担体としてのポリノルボルネン系エラストマー（日本ゼオン株式会社製 商品名「ノルソレックス」12・5容積％と、潤滑油としての鉱物油（出光石油株式会社製 商品名「ダブニースーパーメカニックオイル100」21.3容積％とをヘンシェルミキサーで混合し、70℃で24時間熟成させた。この混合物は泥状を呈している。
この後、自己潤滑性樹脂としてのポリアセタール樹脂粉末（ポリプラスチックス株式会社製 商品名「ジュラコンＭ90-00」56・2容積％と補強充填材としての酸化亜鉛ウィスカー（松下産業情報機器株式会社製 商品名「パナテトラWZ-0531」10.0溶積％とを添加し、再びヘンシェルミキサーで混合して、含油樹脂組成物を得た。
これを2軸混錬押出機によりペレット化し、射出成形にて含油樹脂軸受を得た。
含油樹脂軸受の形状は実施例１と同じである。
[Comparative Example 2]
Polynorbornene elastomer as a lubricant carrier (trade name “Norsolex” 12.5% by volume manufactured by Nippon Zeon Co., Ltd.) and mineral oil as a lubricant (product name “Dubney Super Mechanic Oil 100” 21.3 manufactured by Idemitsu Oil Co., Ltd.) The volume% was mixed with a Henschel mixer and aged for 24 hours at 70 ° C. This mixture was muddy.
After this, polyacetal resin powder as a self-lubricating resin (trade name “Duracon M90-00” 56.2% by volume made by Polyplastics Co., Ltd.) and zinc oxide whisker as a reinforcing filler (made by Matsushita Sangyo Information Equipment Co., Ltd. The name “Panatetra WZ-0531” 10.0% melt was added and mixed again with a Henschel mixer to obtain an oil-containing resin composition.
This was pelletized by a twin-screw kneading extruder and an oil-impregnated resin bearing was obtained by injection molding.
The shape of the oil-impregnated resin bearing is the same as in Example 1.
[吸油試験]
スチレン・ブタジエン系共重合体の基本特性の違いによる潤滑油担体としての性能の差を確認するため、潤滑油としての鉱物油（出光石油株式会社製 商品名「ダフニースーパーメカニックオイル100」10gを、（１）25重量％トルエン溶液粘度＝20200cpsである旭化成株式会社製 商品名「アサプレンT-411G」5gと、（２）25重量％トルエン溶液粘度＝7500 cpsである旭化成株式会社製 商品名「アサプレンT430G」5gに含浸させて、両者を24時間常温で静置した。
24時間後、（１）のT-411Gは、鉱物油を完全に包含し、固形状態となっていたが、（２）のT-430Gは鉱物油が含浸しきれずに、ゲル状の流動体となった。
［スチレン・ブタジエン系共重合体の吸油限界値試験］
試験方法：オイル（ダフニースーパーメカニックオイル100）５．０ｇに吸油担体の「アサプレンＴ−４１１Ｇ」と「アサプレンＴ−４３０Ｇ」をそれぞれ徐々に添加していった時の吸油状態を観察した。結果を表１に示す。
[Oil absorption test]
In order to confirm the difference in performance as a lubricating oil carrier due to the difference in the basic characteristics of styrene-butadiene copolymer, 10 g of mineral oil (trade name “Dafney Super Mechanic Oil 100” manufactured by Idemitsu Oil Co., Ltd.) (1) 25g% toluene solution viscosity = 20200cps made by Asahi Kasei Co., Ltd. trade name "Asuprene T-411G" 5g and (2) 25wt% toluene solution viscosity = 7500 cps made by Asahi Kasei Co., Ltd. It was impregnated with 5 g of “T430G”, and both were allowed to stand at room temperature for 24 hours.
After 24 hours, T-411G of (1) completely contained mineral oil and was in a solid state, but T-430G of (2) was not completely impregnated with mineral oil, and was a gel-like fluid. It became.
[Oil absorption limit value test of styrene-butadiene copolymer]
Test method: The oil absorption state was observed when "Asuprene T-411G" and "Asaprene T-430G" as oil absorbing carriers were gradually added to 5.0 g of oil (Daphney Super Mechanic Oil 100). The results are shown in Table 1.
吸油担体として、樹脂との混合に用いるには、「オイルを吸着し、流れないゼリー状」が吸油量の限界と考えられ、「ほぼオイルを包含し、粒子状が目立つ」状態が混合時の分散性を考慮する上では理想的である。よって、Ｔ−４３０Ｇが１．３倍までのオイルしか吸着できないのに対し、Ｔ−４１１Ｇは２倍のオイルを混合に理想的な状態で吸着できることが確認された。この実験により、Ｔ−４１１Ｇが潤滑油担体として、より適していることが確認できた。 As an oil-absorbing carrier, when used in mixing with a resin, “the jelly form that adsorbs oil and does not flow” is considered to be the limit of the oil absorption amount. Ideal for considering dispersibility. Therefore, it was confirmed that T-430G can adsorb only up to 1.3 times of oil, whereas T-411G can adsorb 2 times of oil in an ideal state for mixing. This experiment confirmed that T-411G is more suitable as a lubricant carrier.
[含油樹脂組成物の表面粗さ比較試験]
実施例１、２及び比較例１、２で得られた軸受の表面粗さをＪＩＳ Ｂ０６０１-1994に準拠した方法にて測定した。結果を表２、図１に示す。潤滑油担体にポリノルボルネン系を用いた比較例２の軸受に対して、スチレン・ブタジエン系を用いた実施例１、２及び比較例１の軸受は表面粗さが小さく、平滑性が向上しており、本発明による実施例１、２で得られた軸受は、さらに平滑性が向上していることが確認された。
[Surface roughness comparison test of oil-impregnated resin composition]
The surface roughness of the bearings obtained in Examples 1 and 2 and Comparative Examples 1 and 2 was measured by a method based on JIS B0601-1994. The results are shown in Table 2 and FIG. The bearings of Examples 1 and 2 and Comparative Example 1 using a styrene / butadiene system have small surface roughness and improved smoothness compared to the bearing of Comparative Example 2 using a polynorbornene system as a lubricating oil carrier. Thus, it was confirmed that the smoothness of the bearings obtained in Examples 1 and 2 according to the present invention was further improved.
[含油樹脂組成物の引張り強度比較試験]
実施例１、２及び比較例１、２で得られた軸受の引っ張り強度をＡＳＴＭ Ｄ６３８に準拠した方法にて測定した。結果を表２、図２に示す。本実施例１、２及び比較例１、２で得られた軸受とも同程度の数値を示し、本実施例の引張り強度は、従来例と遜色無いことが確認できた。
[Tensile strength comparison test of oil-impregnated resin composition]
The tensile strength of the bearings obtained in Examples 1 and 2 and Comparative Examples 1 and 2 was measured by a method based on ASTM D638. The results are shown in Table 2 and FIG. The bearings obtained in Examples 1 and 2 and Comparative Examples 1 and 2 showed similar numerical values, and it was confirmed that the tensile strength of this example was no different from that of the conventional example.
[含油樹脂組成物の限界PV曲線比較試験]
滑り摩擦試験を本実施例１、比較例１、２で製造した含油軸受と及び市販品について行った。評価試験機として、鈴木式摩擦試験機を使用した。相手材として、ＳＵＳ３０３を用いた。試験は常温で実施した。
結果を表３、含油樹脂組成物の限界PV曲線比較グラフとして図３に示す。
[Limit PV curve test of oil-impregnated resin composition]
The sliding friction test was performed on the oil-impregnated bearings manufactured in Example 1 and Comparative Examples 1 and 2 and on a commercial product. A Suzuki friction tester was used as an evaluation tester. SUS303 was used as the counterpart material. The test was conducted at room temperature.
A result is shown in FIG. 3 as Table 3 and the limit PV curve comparison graph of an oil-containing resin composition.
実施例１、２の含油軸受は、各面圧とも高い滑り速度であり、低摩擦であり、潤滑性能が高いことが示された。 It was shown that the oil-impregnated bearings of Examples 1 and 2 had a high sliding speed for each surface pressure, low friction, and high lubrication performance.
[含油樹脂組成物の軸受摩耗量比較試験]
縦方向摩耗試験を本実施例１、比較例１、２で製造した含油軸受と及び市販品について行った。試験は連続運転を１４４時間行い２４時間毎の摩耗量を測定した。
試験条件：軸荷重：３００ｇｆ、回転数：３００ｒｐｍ、軸材：ＳＵＳ３０３、常温
結果を表４、含油樹脂組成物の軸受摩耗量比較グラフとして図４に示す。
[Bearing wear comparison test of oil-impregnated resin composition]
A longitudinal wear test was performed on the oil-impregnated bearings manufactured in Example 1 and Comparative Examples 1 and 2 and on a commercial product. In the test, continuous operation was performed for 144 hours, and the amount of wear every 24 hours was measured.
Test conditions: shaft load: 300 gf, rotation speed: 300 rpm, shaft material: SUS303, normal temperature
A result is shown in FIG. 4 as Table 4 and the bearing wear amount comparison graph of an oil-containing resin composition.
実施例１、実施例２は、比較例１、２より摩耗が少ないことが確認された。実施例１，２は、比較例２に比べてほぼ半分の摩耗量であった。特に、実施例１、２共、比較例１で使用したスチレン・ブタジエンブロック共重合体よりも摩耗が少なく、同種のスチレン・ブタジエン共重合体でも、その特定の共重合構造によって性能が大きく異がなることが認められた。これによって、本実施例の摩耗耐久性が向上していることが確認できた。
It was confirmed that Example 1 and Example 2 had less wear than Comparative Examples 1 and 2. In Examples 1 and 2, the amount of wear was almost half that in Comparative Example 2. In particular, both Examples 1 and 2 have less wear than the styrene / butadiene block copolymer used in Comparative Example 1, and the performance of the same type of styrene / butadiene copolymer varies greatly depending on the specific copolymer structure. It was recognized that Thus, it was confirmed that the wear durability of this example was improved.
Claims (5)
As a lubricating oil carrier, a styrene / butadiene weight ratio of 25/75 to 35/65, MFR (G) [200 ° C., 5 kg] is 1 g / 10 min or less, and a 25 wt% toluene solution viscosity is 20000 cps or more. Using 10 to 15% by volume of the radial teleblock copolymer in the total oil-containing resin composition, 1 to 2 volumes of this lubricating oil carrier is mixed with 1.5 to 2 volumes of lubricating oil to form a powdered mixture. A self-lubricating resin and a reinforcing filler are added and mixed to form an oil-impregnated resin composition. The oil-containing resin composition is pelletized by a twin-screw kneading extruder, and the pellets are injection-molded to form an oil-impregnated resin bearing. How to manufacture.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010116726A (en) * | 2008-11-13 | 2010-05-27 | Ihi Corp | Machine and method for boring deformed cross-section tunnel |
| JP2013082818A (en) * | 2011-10-11 | 2013-05-09 | Asahi Kasei Chemicals Corp | Mechanism component used for slide member and electrophotographic image forming apparatus and used via toner |
| CN109054286A (en) * | 2018-07-17 | 2018-12-21 | 天津布瑞斯克精密橡塑有限公司 | A kind of Wear-resistant engineering plastic, processing method and plastic bearing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010116726A (en) * | 2008-11-13 | 2010-05-27 | Ihi Corp | Machine and method for boring deformed cross-section tunnel |
| JP2013082818A (en) * | 2011-10-11 | 2013-05-09 | Asahi Kasei Chemicals Corp | Mechanism component used for slide member and electrophotographic image forming apparatus and used via toner |
| CN109054286A (en) * | 2018-07-17 | 2018-12-21 | 天津布瑞斯克精密橡塑有限公司 | A kind of Wear-resistant engineering plastic, processing method and plastic bearing |
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