JP5036016B2 - Resin composition for sliding member and slide bearing - Google Patents

Resin composition for sliding member and slide bearing Download PDF

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Publication number
JP5036016B2
JP5036016B2 JP32049399A JP32049399A JP5036016B2 JP 5036016 B2 JP5036016 B2 JP 5036016B2 JP 32049399 A JP32049399 A JP 32049399A JP 32049399 A JP32049399 A JP 32049399A JP 5036016 B2 JP5036016 B2 JP 5036016B2
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Prior art keywords
resin
powder
weight
carbonate
sliding member
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JP2001139977A (en
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一夫 平井
山口  剛
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Oiles Corp
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Oiles Corp
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  • Lubricants (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Sliding-Contact Bearings (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、優れた摩擦摩耗特性を発揮する軸受等の各種摺動部材として用いられる摺動部材用樹脂組成物およびすべり軸受に関するものである。
【0002】
【従来の技術】
従来から、合成樹脂の摩擦摩耗特性を向上させる目的で、合成樹脂に四フッ化エチレン樹脂(以下「PTFE」と略記する。)を含有した軸受等の合成樹脂製摺動部材はよく知られている。この摺動部材は、PTFEの含有により摺動特性が向上され、摺動部材の摺動面に潤滑油剤を供給することなく乾燥摩擦条件下において長期間の使用に耐え得るという利点を有するものである。
【0003】
しかしながら、近年、合成樹脂製摺動部材の用途分野が拡大されるにつれ、合成樹脂製摺動部材には、例えば、▲1▼高温雰囲気下での使用においても優れた摩擦摩耗特性を発揮すること、▲2▼摺動部材の摺動相手材として、比較的軟質のアルミニウム合金等が使用された場合においても、優れた摩擦摩耗特性を発揮しかつ摺動相手材を損傷させない特性を有すること、▲3▼高温雰囲気下での使用であってかつ摺動相手材がアルミニウム合金等の軟質金属である場合においても、優れた摩擦摩耗特性を発揮しかつ摺動相手材を損傷させない特性を有すること、▲4▼複写機等の摺動部材としての用途においては、前記▲1▼、▲2▼、▲3▼に加えて、さらに導電性を有すること、などの諸特性が要求されている。
【0004】
【発明が解決しようとする課題】
上述した要求に対して本出願人は、先に特願平1−41454号(特許第2777724号)において、合成樹脂にPTFEおよびリン酸塩を含有した摺動部材用樹脂組成物を提案した。この特願平1−41454号において提案した樹脂組成物からなる摺動部材は、相手材との摺動において、相手材表面に組成物中のPTFEの強固な潤滑被膜を形成し、摩擦係数が低く、耐摩耗性に優れるものであったが、摺動部材が高温雰囲気下での使用であったり、相手材がアルミニウム合金等の軟質金属であったり、あるいは高温雰囲気下でかつ相手材がアルミニウム合金等の軟質金属であった場合には、必ずしも摩擦摩耗特性において満足できるものではなかった。
【0005】
また、上記リン酸塩に代えてまたは加えて、リン酸塩と同様の働きをする炭酸塩を添加した摺動部材用樹脂組成物も提案されている。しかしながら、この炭酸塩を添加した摺動部材用樹脂組成物も、摺動部材が高温雰囲気下での使用であったり、相手材がアルミニウム合金等の軟質金属であったり、あるいは高温雰囲気下でかつ相手材がアルミニウム合金等の軟質金属であった場合には、必ずしも摩擦摩耗特性において満足できるものではなかった。
【0006】
さらに、上記摺動部材用樹脂組成物は、いずれも複写機等の摺動部材など導電性が要求される用途には適用できなかった。
【0007】
本発明は上記諸点に鑑みてなされたもので、高温雰囲気下での使用であったり、摺動相手材が軟質金属であったり、あるいは高温雰囲気下でかつ摺動相手材が軟質金属であった場合でも、また導電性が要求される用途においても、摩擦摩耗特性に優れた摺動部材用樹脂組成物およびすべり軸受を提供することを目的とする。
【0008】
【課題を解決するための手段】
本発明によれば、上記目的は、合成樹脂に四フッ化エチレン樹脂5〜50重量%、炭酸塩0.1〜15重量%、銅粉末、亜鉛粉末および酸化銅粉末から選択される成分0.1〜15重量%が含有されてなる摺動部材用樹脂組成物によって達成される。
【0009】
また、本発明によれば、上記目的は、上記成分組成からなる樹脂組成物にさらにリン酸塩が含有され、かつ該リン酸塩と炭酸塩との合計が0.1〜15重量%である摺動部材用樹脂組成物によっても達成される。
【0010】
また、本発明によれば、上記目的は、上述した合成樹脂、PTFE、炭酸塩あるいは炭酸塩とリン酸塩、および銅粉末、亜鉛粉末、酸化銅粉末から選択される成分からなる摺動部材用樹脂組成物にさらに1〜10重量%の導電性カーボンブラックを含有した摺動部材用樹脂組成物によっても達成される。
【0011】
さらに、本発明によれば、上記目的は、これら摺動部材用樹脂組成物を成形してなるすべり軸受によっても達成される。
【0012】
【発明の実施の形態】
本発明に使用される合成樹脂は、摺動部材に要求される機械的性質、化学的性質を備えており、加うるに自己潤滑性を有しているものであれば一層好ましい。具体的には、ポリアセタール樹脂、ポリアミド樹脂、ポリブチレンテレフタレート樹脂、ポリフェニレンサルファイド樹脂、ポリエーテルイミド樹脂、ポリエーテルスルホン樹脂、ポリシアノアリールエーテル樹脂、ポリエーテルケトン樹脂、ポリアミドイミド樹脂、ポリイミド樹脂から選択されるが、摺動部材が高温雰囲気下で使用される用途においては、上記合成樹脂のうち、ポリフェニレンサルファイド樹脂、ポリエーテルイミド樹脂、ポリエーテルスルホン樹脂、ポリシアノアリールエーテル樹脂、ポリエーテルケトン樹脂、ポリアミドイミド樹脂、ポリイミド樹脂から選択される。
【0013】
本発明におけるPTFEは、モールディングパウダーあるいはファインパウダーとして主に成形用途に使用される成形用粉末および潤滑用途に使用される潤滑用粉末のいずれをも使用することができ、また両者を同時に使用することもできる。成形用粉末としては、例えば三井デュポンフロロケミカル社製の「テフロン6J(商品名)」、「テフロン7J(商品名)」、ダイキン工業社製の「ポリフロンM−15(商品名)」、「ポリフロンF−103(商品名)」、旭硝子社製の「アフロンG163(商品名)」などを挙げることができ、また、潤滑用粉末としては、例えば三井デュポンフロロケミカル社製の「TLP−10(商品名)」、ダイキン工業社製の「ルブロンL5(商品名)」などを挙げることができる。
【0014】
そして、このPTFEの配合量は、5〜50重量%、好ましくは10〜30重量%である。配合量が5重量%より少ないと潤滑特性の向上に効果が現れず、また50重量%を越えて配合すると潤滑特性は向上する反面、成形性を著しく損なうばかりでなく成形物の機械的強度を著しく低下させることになる。
【0015】
本発明における炭酸塩は、それ自体何ら潤滑性を示すものではないが、前記合成樹脂、PTFEおよび後述する銅粉末、亜鉛粉末、酸化銅粉末から選択される成分に配合されることにより、PTFEと銅粉末、亜鉛粉末または酸化銅粉末との混合被膜の相手材表面への移着性を助長し、かつ該被膜の相手材への保持性を高め、被膜の耐久性を高めるという効果を発揮する。かかる炭酸塩の効果により、相手材表面に、混合被膜として充分な厚みの、かつ該表面に強固に保持された混合被膜が形成される。そして、この混合被膜の形成により、相手材および摺動部材の耐摩耗性が高められる。
【0016】
上述した効果を発揮する炭酸塩としては、アルカリ金属あるいはアルカリ土類金属の炭酸塩を挙げることができる。具体的には、炭酸リチウム、炭酸カルシウム、炭酸マグネシウム、炭酸バリウム、炭酸ナトリウム、炭酸カリウムが本発明で使用する炭酸塩として好ましい。
【0017】
この炭酸塩は、均一に混合するためにも平均粒径20μm以下のものが好ましい。また、炭酸塩中に結晶水を有しているものについては、予め熱処理することによって該結晶水を蒸発逸散せしめてから使用される。炭酸塩の配合量は、0.1〜15重量%、好ましくは3〜10重量%である。配合量が0.1重量%より少ないと組成物中のPTFEと後述する銅粉末、亜鉛粉末または酸化銅粉末との混合被膜の相手材表面への移着性、該被膜の保持性、耐久性に効果が発揮されず、また15重量%を超えて配合すると、相手材表面に良好な混合被膜が形成されず摩擦摩耗特性を悪化させるという欠点が現れる。
【0018】
本発明における銅粉末、亜鉛粉末および酸化銅粉末は、組成物中に均一に分散されて組成物中の前記PTFEとともに相手材表面に混合被膜を形成し、摩擦摩耗特性の向上に効果を発揮するもので、平均粒径50μm以下のものが好ましい。これらの粉末は、特に限定されるものではなく、市販されているものが使用できる。例えば、銅粉末であれば、電解粉、アトマイズ粉、搗砕粉のいずれをも使用できる。配合量は0.1〜15重量%、好ましくは2〜10重量%である。配合量が0.1重量%より少ないと摩擦摩耗特性の向上に効果が現れず、また、15重量%を越えて配合すると、成形性を損なうばかりでなく混合被膜中に存在する量が多くなりすぎ、相手材としてアルミニウム合金等の軟質金属が使用された場合には、当該相手材表面を損傷するという欠点が現れる。
【0019】
本発明においては、上述した成分組成からなる摺動部材用樹脂組成物に、さらにリン酸塩を配合することができる。本発明におけるリン酸塩は上述の炭酸塩と同様に、それ自体なんら潤滑性を示すものではないが、炭酸塩と協働してPTFEと銅粉末、亜鉛粉末または酸化銅粉末との混合被膜の相手材表面への移着性を助長し、かつ該被膜の相手材への保持性を高め、被膜の耐久性を高めるという効果を発揮する。
【0020】
上述した効果を発揮するリン酸塩としては、アルカリ金属、アルカリ土類金属などの金属の第三リン酸塩、第二リン酸塩、ピロリン酸塩、亜リン酸塩、メタリン酸塩およびそれらの混合物を挙げることができる。この中でも、第三リン酸塩、第二リン酸塩およびピロリン酸塩が好ましい。具体的には、リン酸リチウム(LiPO)、リン酸水素リチウム(LiHPO)、ピロリン酸リチウム(Li)、リン酸カルシウム(Ca(PO)、リン酸水素カルシウム(CaHPO(・2HO))、ピロリン酸カルシウム(Ca)、リン酸マグネシウム(Mg(PO・4HO)、リン酸水素マグネシウム(MgHPO)、ピロリン酸マグネシウム(Mg)、リン酸バリウム(Ba(PO)、リン酸水素バリウム(BaHPO)およびピロリン酸バリウム(Ba)が本発明で使用するリン酸塩としては好ましいものである。
【0021】
このリン酸塩は、均一に混合するためにも平均粒径20μm以下のものが好ましい。また、リン酸塩中に結晶水を有しているものについては、予め熱処理することによって該結晶水を蒸発逸散せしめてから使用される。リン酸塩は前記炭酸塩との合計が0.1〜15重量%、好ましくは3〜10重量%となるように配合される。リン酸塩と前記炭酸塩との合計の配合量が0.1重量%より少ないと組成物中のPTFEと銅粉末、亜鉛粉末または酸化銅粉末との混合被膜の相手材表面への移着性、該被膜の保持性、耐久性に効果が発揮されず、また15重量%を超えて配合すると、相手材表面に良好な混合被膜が形成されず摩擦摩耗特性を悪化させるという欠点が現れる。
【0022】
また、本発明においては、上述した合成樹脂、PTFE、炭酸塩あるいは炭酸塩とリン酸塩、および銅粉末、亜鉛粉末、酸化銅粉末から選択される成分からなる摺動部材用樹脂組成物に対し、帯電防止性能等の導電性を付加するために、さらに、導電性カーボンブラックを配合することができる。導電性カーボンブラックの配合量は、1〜10重量%、好ましくは3〜8重量%である。配合量が1重量%より少ないと導電性の効果が現れず、また10重量%を越えて配合すると、成形性を悪化させるとともに成形物の機械的強度を低下させる。
【0023】
導電性カーボンブラックとしては、市販の導電性カーボンブラックでよく、ライオンアクゾ社製の「ケッチェンブラック(商品名)」を例示することができる。
【0024】
上述した成分組成からなる摺動部材用樹脂組成物を成形するには、合成樹脂、PTFE、炭酸塩、および銅粉末、亜鉛粉末、酸化銅粉末から選択される成分、必要に応じてリン酸塩、導電性カーボンブラックをそれぞれ計量しヘンシェルミキサー、スーパーミキサー、ボールミル、タンブラーミキサー等の混合機によって混合して混合物を作製し、この混合物を射出成形機もしくは押出成形機に供給して成形する方法、あるいは混合物を押出機により溶融混練し、紐状の成形物に成形したのち裁断してペレットを作製し、これを成形原料として射出成形機あるいは押出成形機により成形する方法が採られる。
【0025】
【実施例】
以下、実施例により本発明を詳細に説明するが、本発明はその要旨を越えない限り、以下の実施例に限定されるものではない。
【0026】
<実施例1>
合成樹脂として、ポリアセタール樹脂(以下「POM」と略記する。ポリプラスチックス社製の「ジュラコンM90(商品名)」)粉末に、PTFE(ダイキン工業社製の「ルブロンL5(商品名)」)粉末10重量%、炭酸リチウム(LiCO)粉末3重量%および平均粒径3μmの銅粉末2重量%をスーパーミキサーに投入し、混合してPOM粉末85重量%、PTFE粉末10重量%、炭酸リチウム粉末3重量%および銅粉末2重量%からなる混合粉末を得た。この混合粉末をスクリューインライン型射出成形機によって、成形温度160〜200℃、射出成形圧力600kg/cmの条件で成形し、内径10mm、外径14mm、長さ12mmの円筒状摺動部材(すべり軸受)を作製した。
【0027】
<実施例2〜4、実施例6〜8、比較例1〜3>
実施例1において、表2ないし表4に示すように組成を変更した以外は、実施例1と同様の方法で内径10mm、外径14mm、長さ12mmの円筒状摺動部材(すべり軸受)を作製した。亜鉛粉末としては平均粒径45μmの亜鉛粉末を、酸化銅粉末としては平均粒径7μmの酸化銅粉末を使用した。
【0028】
<実施例5>
合成樹脂として、ポリアミド樹脂(以下「PA」と略記する。東レ社製の6ナイロン「アミラン(商品名)」)粉末に、PTFE(上記実施例1と同じ)粉末20重量%、炭酸リチウム(上記実施例1と同じ)粉末5重量%および平均粒径3μmの銅粉末2重量%をスーパーミキサーに投入し、混合してポリアミド樹脂粉末73重量%、PTFE粉末20重量%、炭酸リチウム粉末5重量%および銅粉末2重量%からなる混合粉末を得た。この混合粉末をスクリューインライン型射出成形機によって、成形温度200〜250℃、射出成形圧力600kg/cmの条件で成形し、内径10mm、外径14mm、長さ12mmの円筒状摺動部材(すべり軸受)を作製した。
【0029】
上述した実施例1ないし実施例8および比較例1ないし比較例3で作製した円筒状摺動部材について、表1に示す条件でジャーナル試験を行った。その結果を表2ないし表4に示す。
【0030】
【表1】
すべり速度 7m/min
荷重 4kgf/cm
相手材 アルミニウム合金(A5056−H34)
相手材表面粗さ 3μmR
試験時間 24時間
潤滑 無潤滑
試験雰囲気温度 常温(25℃)
(以下余白)
【0031】
【表2】

Figure 0005036016
(以下余白)
【0032】
【表3】
Figure 0005036016
(以下余白)
【0033】
【表4】
Figure 0005036016
【0034】
上表中、摩耗量は摺動部材の寸法変化量を示し、また相手材表面の損傷度の評価は、損傷が認められないものを〇印にて、損傷が認められるものを×印にて表示した。
【0035】
以上の試験結果から、実施例1ないし実施例8の摺動部材は、試験後の相手材表面に損傷は認められず、PTFEと銅粉末、亜鉛粉末または酸化銅粉末との良好な混合被膜が形成されているのが確認され、摩擦摩耗特性においても、極めて良好な性能を示した。一方、比較例1ないし比較例3の摺動部材は、相手材表面に若干の損傷を与えているのが確認され、いずれの比較例においても実施例からなる摺動部材に比べ摩擦摩耗特性に劣っていることが分かる。
【0036】
次に、高温雰囲気下で使用される用途に適した実施例について説明する。
【0037】
<実施例9>
ポリフェニレンサルファイド樹脂(以下「PPS」と略記する。トープレン社製の「T−4(商品名)」)粉末に、PTFE(前記実施例1と同じ)粉末10重量%、炭酸リチウム(前記実施例1と同じ)粉末3重量%および平均粒径3μmの銅粉末2重量%をスーパーミキサーに投入し、混合してPPS粉末85重量%、PTFE10重量%、炭酸リチウム3重量%および銅粉末2重量%からなる混合粉末を得た。この混合粉末をスクリューインライン型射出成形機によって、成形温度270〜300℃、射出成形圧力800kg/cmの条件で成形し、内径10mm、外径14mm、長さ12mmの円筒状摺動部材(すべり軸受)を作製した。
【0038】
<実施例10〜12、実施例14〜16、比較例4〜6>
実施例9において、表6ないし表8に示すように組成を変更した以外は、実施例9と同様の方法で内径10mm、外径14mm、長さ12mmの円筒状摺動部材(すべり軸受)を作製した。亜鉛粉末としては平均粒径45μmの亜鉛粉末を、酸化銅粉末としては平均粒径7μmの酸化銅粉末を使用した。
【0039】
<実施例13>
ポリエーテルケトン樹脂(以下「PEK」と略記する。BASF社製「Ultrapek−A1000(商品名)」)粉末に、PTFE(前記実施例1と同じ)粉末30重量%、炭酸リチウム(前記実施例1と同じ)粉末5重量%および平均粒径3μmの銅粉末2重量%をスーパーミキサーに投入し、混合してPEK粉末63重量%、PTFE粉末30重量%、炭酸リチウム粉末5重量%および銅粉末2重量%からなる混合粉末を得た。この混合粉末をスクリューインライン型射出成形機によって、成形温度350〜400℃、射出成形圧力800kg/cmの条件で成形し、内径10mm、外径14mm、長さ12mmの円筒状摺動部材(すべり軸受)を作製した。
【0040】
上述した実施例9ないし実施例16および比較例4ないし比較例6で作製した円筒状摺動部材について、表5に示す条件でジャーナル試験を行った。その結果を表6ないし表8に示す。
【0041】
【表5】
すべり速度 7m/min
荷重 4kgf/cm
相手材 アルミニウム合金(A5056−H34)
相手材表面粗さ 3μmR
試験時間 24時間
潤滑 無潤滑
試験雰囲気温度 200℃
(以下余白)
【0042】
【表6】
Figure 0005036016
(以下余白)
【0043】
【表7】
Figure 0005036016
(以下余白)
【0044】
【表8】
Figure 0005036016
【0045】
上表中、摩耗量は摺動部材の寸法変化量を示し、また相手材表面の損傷度の評価は、前述した評価と同様、損傷が認められないないものを〇印にて、損傷が認められるものを×印にて表示した。
【0046】
以上の試験結果から、実施例9ないし実施例16の摺動部材は、試験後の相手材表面に損傷は認められず、PTFEと銅粉末、亜鉛粉末または酸化銅粉末との良好な混合被膜が形成されているのが確認され、摩擦摩耗特性においても極めて良好な性能を示した。一方、比較例4の摺動部材は相手材表面に損傷は認められなかったものの摩耗量が大きいことが確認され、また比較例5および比較例6の摺動部材は、相手材表面に若干の損傷を与えているのが確認された。
【0047】
つぎに、導電性が要求される用途に適した実施例について説明する。
【0048】
<実施例17>
PPS(前記実施例9と同じ)粉末に、PTFE(前記実施例1と同じ)粉末10重量%、炭酸リチウム(前記実施例1と同じ)粉末3重量%、平均粒径3μmの銅粉末2重量%および導電性カーボンブラック(ライオン・アクゾ社製の「ケッチェンブラックEC600JD(商品名)」)粉末3重量%をスーパーミキサーに投入し、混合してPPS粉末82重量%、PTFE粉末10重量%、炭酸リチウム粉末3重量%、銅粉末2重量%および導電性カーボンブラック粉末3重量%からなる混合粉末を得た。この混合粉末をスクリューインライン型射出成形機によって、成形温度270〜300℃、射出成形圧力800kg/cmの条件で成形し、内径23mm、外径29mm、長さ6mmの円筒状摺動部材(すべり軸受)を作製した。
【0049】
<実施例18〜20、実施例22〜24、比較例7〜9>
実施例17において、表10ないし表12に示すように組成を変更した以外は、実施例17と同様の方法で内径23mm、外径29mm、長さ6mmの円筒状摺動部材(すべり軸受)を作製した。亜鉛粉末としては平均粒径45μmの亜鉛粉末を、酸化銅粉末としては平均粒径7μmの酸化銅粉末を使用した。
【0050】
<実施例21>
PEK(前記実施例13と同じ)粉末に、PTFE(前記実施例1と同じ)粉末30重量%、炭酸リチウム(前記実施例1と同じ)粉末5重量%、平均粒径3μmの銅粉末2重量%および導電性カーボンブラック(上記実施例17と同じ)5重量%をスーパーミキサーに投入し、混合してPEK粉末58重量%、PTFE粉末30重量%、炭酸リチウム粉末5重量%、銅粉末2重量%および導電性カーボンブラック5重量%からなる混合粉末を得た。この混合粉末をスクリューインライン型射出成形機によって、成形温度350〜400℃、射出成形圧力800kg/cmの条件で成形し、内径23mm、外径29mm、長さ6mmの円筒状摺動部材(すべり軸受)を作製した。
【0051】
上述した実施例17ないし実施例24および比較例7ないし比較例9で作製した円筒状摺動部材について、表9に示す条件でジャーナル試験を行った。その結果を表10ないし表12に示す。
【0052】
【表9】
すべり速度 5.2m/min
荷重 4.4kgf/cm
相手材 アルミニウム合金(A5052−H34)
相手材表面粗さ 3μmR
試験時間 24時間
潤滑 無潤滑
試験雰囲気温度 185℃
(以下余白)
【0053】
【表10】
Figure 0005036016
【0054】
【表11】
Figure 0005036016
【0055】
【表12】
Figure 0005036016
【0056】
上表中、摩耗量は摺動部材の寸法変化量を示す。体積固有抵抗値は、成形物の両端に導電性塗料を塗布し、JIS K6911に準拠して乾燥後両端の抵抗を測定した。また相手材表面の損傷度の評価は、前述した評価と同様、損傷が認められないものを〇印にて、損傷が認められるものを×印にて表示した。
【0057】
以上の試験結果から、実施例17ないし実施例24の摺動部材は、試験後の相手材表面に損傷は認められず、PTFEと銅粉末、亜鉛粉末または酸化銅粉末との良好な混合被膜が形成されているのが確認され、摩擦摩耗特性においても極めて良好な性能を示した。一方、比較例7の摺動部材は相手材表面に損傷は認められなかったものの摩耗量が大きいことが確認され、また比較例8および比較例9の摺動部材は、相手材表面に若干の損傷が認められ、摩耗量が大きいことが確認された。
【0058】
【発明の効果】
以上説明した本発明によれば、摺動部材の用途に応じて適宜合成樹脂を選択することにより、常温から高温雰囲気下において優れた摩擦摩耗特性を発揮する摺動部材用樹脂組成物およびすべり軸受が提供される。[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a sliding member resin composition and a sliding bearing used as various sliding members such as a bearing exhibiting excellent frictional wear characteristics.
[0002]
[Prior art]
Conventionally, a synthetic resin sliding member such as a bearing containing a tetrafluoroethylene resin (hereinafter abbreviated as “PTFE”) in the synthetic resin for the purpose of improving the frictional wear characteristic of the synthetic resin is well known. Yes. This sliding member has the advantage that the sliding characteristics are improved by containing PTFE, and it can withstand long-term use under dry friction conditions without supplying a lubricant to the sliding surface of the sliding member. is there.
[0003]
However, in recent years, as the application field of synthetic resin sliding members has been expanded, the synthetic resin sliding members exhibit, for example, (1) excellent friction and wear characteristics even when used in a high temperature atmosphere. (2) Even when a relatively soft aluminum alloy or the like is used as the sliding member of the sliding member, it has excellent friction and wear characteristics and does not damage the sliding member. (3) Even when used in a high temperature atmosphere and the sliding counterpart is a soft metal such as an aluminum alloy, it has excellent friction and wear characteristics and does not damage the sliding counterpart. (4) In use as a sliding member for a copying machine or the like, in addition to the above (1), (2), and (3), various characteristics such as having electrical conductivity are required.
[0004]
[Problems to be solved by the invention]
In response to the above-mentioned requirements, the present applicant previously proposed a resin composition for a sliding member containing PTFE and phosphate as a synthetic resin in Japanese Patent Application No. 1-441454 (Japanese Patent No. 2777724). The sliding member made of the resin composition proposed in Japanese Patent Application No. Hei 1-441454 forms a strong lubricating film of PTFE in the composition on the surface of the counterpart material when sliding with the counterpart material, and has a friction coefficient. Although it was low and excellent in wear resistance, the sliding member was used in a high temperature atmosphere, the mating material was a soft metal such as an aluminum alloy, or the mating material was aluminum in a high temperature atmosphere In the case of a soft metal such as an alloy, the friction and wear characteristics are not always satisfactory.
[0005]
In addition, a resin composition for a sliding member to which a carbonate functioning in the same manner as a phosphate is added instead of or in addition to the phosphate has been proposed. However, the resin composition for sliding members to which this carbonate is added is also used when the sliding member is used in a high temperature atmosphere, the counterpart material is a soft metal such as an aluminum alloy, or in a high temperature atmosphere. When the counterpart material is a soft metal such as an aluminum alloy, the friction and wear characteristics are not always satisfactory.
[0006]
Furthermore, none of the above resin compositions for sliding members could be applied to applications requiring electrical conductivity such as sliding members for copying machines and the like.
[0007]
The present invention has been made in view of the above-mentioned points, and is used under a high temperature atmosphere, the sliding counterpart material is a soft metal, or the high temperature atmosphere and the sliding counterpart material is a soft metal. Even in this case, it is an object of the present invention to provide a resin composition for a sliding member and a slide bearing which are excellent in friction and wear characteristics even in applications where conductivity is required.
[0008]
[Means for Solving the Problems]
According to the present invention, the object is to provide a synthetic resin containing 5 to 50% by weight of tetrafluoroethylene resin, 0.1 to 15% by weight of carbonate, copper powder, zinc powder and copper oxide powder. This is achieved by a resin composition for a sliding member containing 1 to 15% by weight.
[0009]
Further, according to the present invention, the object is that the resin composition comprising the above component composition further contains a phosphate, and the total of the phosphate and the carbonate is 0.1 to 15% by weight. This is also achieved by a resin composition for sliding members.
[0010]
Further, according to the present invention, the object is for a sliding member comprising the above-mentioned synthetic resin, PTFE, carbonate or carbonate and phosphate, and a component selected from copper powder, zinc powder, and copper oxide powder. This is also achieved by a resin composition for a sliding member, which further contains 1 to 10% by weight of conductive carbon black in the resin composition.
[0011]
Furthermore, according to this invention, the said objective is achieved also by the slide bearing formed by shape | molding these resin compositions for sliding members.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The synthetic resin used in the present invention is more preferable if it has the mechanical and chemical properties required for the sliding member and, in addition, has self-lubricating properties. Specifically, selected from polyacetal resin, polyamide resin, polybutylene terephthalate resin, polyphenylene sulfide resin, polyetherimide resin, polyethersulfone resin, polycyanoaryl ether resin, polyetherketone resin, polyamideimide resin, and polyimide resin. However, in applications where the sliding member is used in a high temperature atmosphere, among the above synthetic resins, polyphenylene sulfide resin, polyether imide resin, polyether sulfone resin, polycyanoaryl ether resin, polyether ketone resin, polyamide It is selected from imide resin and polyimide resin.
[0013]
The PTFE in the present invention can use either molding powders mainly used for molding as molding powders or fine powders, and lubricating powders used for lubrication, and both should be used simultaneously. You can also. Examples of the molding powder include “Teflon 6J (trade name)” and “Teflon 7J (trade name)” manufactured by Mitsui DuPont Fluorochemical Co., Ltd., “Polyflon M-15 (trade name)” and “Polyfluorocarbon” manufactured by Daikin Industries, Ltd. F-103 (trade name) ”,“ Aflon G163 (trade name) ”manufactured by Asahi Glass Co., Ltd. and the like, and as a powder for lubrication, for example,“ TLP-10 (commodity product) manufactured by Mitsui DuPont Fluoro Chemical Co., Ltd. Name) "," Lublon L5 (trade name) "manufactured by Daikin Industries, Ltd., and the like.
[0014]
And the compounding quantity of this PTFE is 5 to 50 weight%, Preferably it is 10 to 30 weight%. If the blending amount is less than 5% by weight, there will be no effect in improving the lubrication characteristics. If the blending amount exceeds 50% by weight, the lubrication characteristics will be improved. On the other hand, not only will the moldability be impaired, but the mechanical strength of the molded product will be reduced. It will be significantly reduced.
[0015]
The carbonate in the present invention does not exhibit any lubricity per se, but is blended with the component selected from the synthetic resin, PTFE and copper powder, zinc powder, and copper oxide powder described later, so that PTFE and Promotes the transferability of the mixed coating with copper powder, zinc powder or copper oxide powder to the surface of the counterpart material, and enhances the retention of the coating on the counterpart material, thereby improving the durability of the coating. . Due to the effect of the carbonate, a mixed film having a sufficient thickness as a mixed film and firmly held on the surface is formed on the surface of the counterpart material. And by forming this mixed film, the wear resistance of the counterpart material and the sliding member is enhanced.
[0016]
Examples of carbonates that exhibit the above-described effects include alkali metal or alkaline earth metal carbonates. Specifically, lithium carbonate, calcium carbonate, magnesium carbonate, barium carbonate, sodium carbonate, and potassium carbonate are preferable as the carbonate used in the present invention.
[0017]
This carbonate preferably has an average particle size of 20 μm or less in order to mix uniformly. Moreover, what has crystallization water in carbonate is used after evaporating away the crystallization water by heat-processing previously. The amount of carbonate added is 0.1 to 15% by weight, preferably 3 to 10% by weight. If the blending amount is less than 0.1% by weight, the mixed film of PTFE in the composition and copper powder, zinc powder or copper oxide powder described later can be transferred to the surface of the mating material, the film can be retained and durable. If the blending amount exceeds 15% by weight, a good mixed film is not formed on the surface of the counterpart material, resulting in a disadvantage that the frictional wear characteristics are deteriorated.
[0018]
The copper powder, zinc powder and copper oxide powder in the present invention are uniformly dispersed in the composition and form a mixed film on the surface of the mating material together with the PTFE in the composition, and are effective in improving the friction and wear characteristics. The average particle size is preferably 50 μm or less. These powders are not particularly limited, and commercially available powders can be used. For example, as long as it is a copper powder, any of electrolytic powder, atomized powder, and ground powder can be used. A compounding quantity is 0.1 to 15 weight%, Preferably it is 2 to 10 weight%. If the blending amount is less than 0.1% by weight, the effect of improving the friction and wear characteristics does not appear. If the blending amount exceeds 15% by weight, not only the moldability is deteriorated but also the amount present in the mixed film increases. In the case where a soft metal such as an aluminum alloy is used as the counterpart material, there is a disadvantage that the surface of the counterpart material is damaged.
[0019]
In this invention, a phosphate can be further mix | blended with the resin composition for sliding members which consists of a component composition mentioned above. The phosphate in the present invention does not exhibit any lubricity itself, like the above-mentioned carbonate, but in cooperation with the carbonate, a mixed coating of PTFE and copper powder, zinc powder or copper oxide powder is used. The effect of facilitating transferability to the surface of the mating material, enhancing the retention of the coating on the mating material, and enhancing the durability of the coating.
[0020]
Examples of phosphates that exhibit the above-described effects include tertiary phosphates, secondary phosphates, pyrophosphates, phosphites, metaphosphates of metals such as alkali metals and alkaline earth metals, and their Mention may be made of mixtures. Among these, tertiary phosphate, secondary phosphate and pyrophosphate are preferable. Specifically, lithium phosphate (Li 3 PO 4 ), lithium hydrogen phosphate (Li 2 HPO 4 ), lithium pyrophosphate (Li 4 P 2 O 7 ), calcium phosphate (Ca 3 (PO 4 ) 2 ), phosphorus Calcium hydrogen hydrogen (CaHPO 4 (· 2H 2 O)), calcium pyrophosphate (Ca 2 P 2 O 7 ), magnesium phosphate (Mg 3 (PO 4 ) 2 · 4H 2 O), magnesium hydrogen phosphate (MgHPO 4 ) , Magnesium pyrophosphate (Mg 2 P 2 O 7 ), barium phosphate (Ba 3 (PO 4 ) 2 ), barium hydrogen phosphate (BaHPO 4 ) and barium pyrophosphate (Ba 2 P 2 O 7 ) The phosphate used is preferable.
[0021]
This phosphate preferably has an average particle size of 20 μm or less in order to mix uniformly. Moreover, about what has crystallization water in a phosphate, it is used, after evaporating away this crystallization water by heat-processing previously. The phosphate is blended so that the total amount of the phosphate is 0.1 to 15% by weight, preferably 3 to 10% by weight. When the total amount of the phosphate and the carbonate is less than 0.1% by weight, the transferability of the mixed coating of PTFE and copper powder, zinc powder or copper oxide powder in the composition to the surface of the counterpart material When the coating is not effective in the retention and durability of the coating and exceeds 15% by weight, there is a disadvantage that a good mixed coating is not formed on the surface of the counterpart material and the frictional wear characteristics are deteriorated.
[0022]
In the present invention, the resin composition for sliding members comprising the above-described synthetic resin, PTFE, carbonate or carbonate and phosphate, and a component selected from copper powder, zinc powder, and copper oxide powder. In order to add conductivity such as antistatic performance, conductive carbon black can be further blended. The compounding quantity of electroconductive carbon black is 1 to 10 weight%, Preferably it is 3 to 8 weight%. If the blending amount is less than 1% by weight, the conductive effect does not appear. If the blending amount exceeds 10% by weight, the moldability is deteriorated and the mechanical strength of the molded product is lowered.
[0023]
The conductive carbon black may be a commercially available conductive carbon black, and examples thereof include “Ketjen Black (trade name)” manufactured by Lion Akzo.
[0024]
In order to mold the resin composition for a sliding member comprising the above-described component composition, synthetic resin, PTFE, carbonate, and a component selected from copper powder, zinc powder, copper oxide powder, and phosphate if necessary The conductive carbon black is weighed and mixed by a mixer such as a Henschel mixer, a super mixer, a ball mill, a tumbler mixer, etc. to prepare a mixture, and this mixture is supplied to an injection molding machine or an extrusion molding machine to be molded, Alternatively, the mixture is melt-kneaded with an extruder, formed into a string-like molded product, and then cut to produce pellets, and this is used as a forming raw material and molded with an injection molding machine or an extrusion molding machine.
[0025]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to a following example, unless the summary is exceeded.
[0026]
<Example 1>
As a synthetic resin, polyacetal resin (hereinafter abbreviated as “POM”. “Duracon M90 (trade name)”) manufactured by Polyplastics Co., Ltd., PTFE (“Lublon L5 (trade name)” manufactured by Daikin Industries, Ltd.) powder 10% by weight, 3 % by weight of lithium carbonate (LiCO 3 ) powder and 2% by weight of copper powder having an average particle size of 3 μm are charged into a super mixer and mixed to obtain 85% by weight of POM powder, 10% by weight of PTFE powder, and lithium carbonate powder. A mixed powder consisting of 3% by weight and 2% by weight of copper powder was obtained. This mixed powder is molded by a screw in-line injection molding machine under the conditions of a molding temperature of 160 to 200 ° C. and an injection molding pressure of 600 kg / cm 2 , and is a cylindrical sliding member (slip) having an inner diameter of 10 mm, an outer diameter of 14 mm, and a length of 12 mm. Bearing).
[0027]
<Examples 2-4, Examples 6-8, Comparative Examples 1-3>
In Example 1, a cylindrical sliding member (sliding bearing) having an inner diameter of 10 mm, an outer diameter of 14 mm, and a length of 12 mm was obtained in the same manner as in Example 1 except that the composition was changed as shown in Tables 2 to 4. Produced. A zinc powder having an average particle size of 45 μm was used as the zinc powder, and a copper oxide powder having an average particle size of 7 μm was used as the copper oxide powder.
[0028]
<Example 5>
As a synthetic resin, polyamide resin (hereinafter abbreviated as “PA”, 6 nylon “Amilan (trade name)” manufactured by Toray Industries, Inc.), PTFE (same as Example 1) powder, 20% by weight, lithium carbonate (above The same as in Example 1) 5% by weight of powder and 2% by weight of copper powder having an average particle diameter of 3 μm were charged into a super mixer and mixed to obtain 73% by weight of polyamide resin powder, 20% by weight of PTFE powder, and 5% by weight of lithium carbonate powder. A mixed powder consisting of 2% by weight of copper powder was obtained. This mixed powder is molded by a screw in-line type injection molding machine under conditions of a molding temperature of 200 to 250 ° C. and an injection molding pressure of 600 kg / cm 2 , and is a cylindrical sliding member (slip) having an inner diameter of 10 mm, an outer diameter of 14 mm, and a length of 12 mm. Bearing).
[0029]
A journal test was performed on the cylindrical sliding members produced in Examples 1 to 8 and Comparative Examples 1 to 3 described above under the conditions shown in Table 1. The results are shown in Tables 2 to 4.
[0030]
[Table 1]
Sliding speed 7m / min
Load 4 kgf / cm 2
Mating material Aluminum alloy (A5056-H34)
Counterpart surface roughness 3μmR Z
Test time 24 hours lubrication Unlubricated test ambient temperature Room temperature (25 ℃)
(The following margin)
[0031]
[Table 2]
Figure 0005036016
(The following margin)
[0032]
[Table 3]
Figure 0005036016
(The following margin)
[0033]
[Table 4]
Figure 0005036016
[0034]
In the above table, the amount of wear indicates the amount of dimensional change of the sliding member, and the evaluation of the degree of damage on the surface of the mating member is indicated by a circle with no damage, and with a cross with damage. displayed.
[0035]
From the above test results, in the sliding members of Examples 1 to 8, no damage was observed on the surface of the mating material after the test, and a good mixed film of PTFE and copper powder, zinc powder or copper oxide powder was obtained. It was confirmed that it was formed, and it showed very good performance in terms of friction and wear characteristics. On the other hand, it has been confirmed that the sliding members of Comparative Examples 1 to 3 are slightly damaged on the surface of the mating material, and in any of the comparative examples, the frictional wear characteristics are higher than those of the sliding members of the examples. It turns out that it is inferior.
[0036]
Next, an example suitable for an application used in a high temperature atmosphere will be described.
[0037]
<Example 9>
A polyphenylene sulfide resin (hereinafter abbreviated as “PPS”; “T-4 (trade name)” manufactured by Toprene Co., Ltd.) powder, 10% by weight of PTFE (same as Example 1) powder, lithium carbonate (Example 1 above) The same as the above) 3% by weight of powder and 2% by weight of copper powder having an average particle diameter of 3 μm were put into a super mixer and mixed to obtain 85% by weight of PPS powder, 10% by weight of PTFE, 3% by weight of lithium carbonate and 2% by weight of copper powder. To obtain a mixed powder. This mixed powder is molded by a screw in-line type injection molding machine under conditions of a molding temperature of 270 to 300 ° C. and an injection molding pressure of 800 kg / cm 2 , and is a cylindrical sliding member (slip) having an inner diameter of 10 mm, an outer diameter of 14 mm, and a length of 12 mm. Bearing).
[0038]
<Examples 10 to 12, Examples 14 to 16, and Comparative Examples 4 to 6>
In Example 9, a cylindrical sliding member (slide bearing) having an inner diameter of 10 mm, an outer diameter of 14 mm, and a length of 12 mm was obtained in the same manner as in Example 9 except that the composition was changed as shown in Tables 6 to 8. Produced. A zinc powder having an average particle size of 45 μm was used as the zinc powder, and a copper oxide powder having an average particle size of 7 μm was used as the copper oxide powder.
[0039]
<Example 13>
Polyetherketone resin (hereinafter abbreviated as “PEK”; “Ultrapek-A1000 (trade name)” manufactured by BASF) powder, 30% by weight of PTFE (same as Example 1) powder, lithium carbonate (Example 1) The same as the above) 5% by weight of powder and 2% by weight of copper powder having an average particle size of 3 μm were put into a super mixer and mixed to 63% by weight of PEK powder, 30% by weight of PTFE powder, 5% by weight of lithium carbonate powder and 2% of copper powder. A mixed powder consisting of% by weight was obtained. This mixed powder is molded by a screw in-line type injection molding machine under conditions of a molding temperature of 350 to 400 ° C. and an injection molding pressure of 800 kg / cm 2 , and is a cylindrical sliding member (slip) having an inner diameter of 10 mm, an outer diameter of 14 mm, and a length of 12 mm. Bearing).
[0040]
A journal test was conducted on the cylindrical sliding members produced in Examples 9 to 16 and Comparative Examples 4 to 6 described above under the conditions shown in Table 5. The results are shown in Tables 6 to 8.
[0041]
[Table 5]
Sliding speed 7m / min
Load 4 kgf / cm 2
Mating material Aluminum alloy (A5056-H34)
Counterpart surface roughness 3μmR Z
Test time 24 hours lubrication Unlubricated test ambient temperature 200 ° C
(The following margin)
[0042]
[Table 6]
Figure 0005036016
(The following margin)
[0043]
[Table 7]
Figure 0005036016
(The following margin)
[0044]
[Table 8]
Figure 0005036016
[0045]
In the above table, the amount of wear indicates the amount of dimensional change of the sliding member, and the degree of damage on the surface of the mating material is evaluated with the ◯ mark where no damage is observed, as in the previous evaluation. Are displayed with a cross.
[0046]
From the above test results, in the sliding members of Examples 9 to 16, no damage was observed on the surface of the mating material after the test, and a good mixed film of PTFE and copper powder, zinc powder or copper oxide powder was obtained. It was confirmed that it was formed, and it showed very good performance in terms of friction and wear characteristics. On the other hand, the sliding member of Comparative Example 4 was confirmed to have a large amount of wear although no damage was observed on the surface of the counterpart material, and the sliding members of Comparative Examples 5 and 6 had a slight amount on the surface of the counterpart material. Damage was confirmed.
[0047]
Next, an embodiment suitable for an application requiring electrical conductivity will be described.
[0048]
<Example 17>
PPS (same as in Example 9) powder, PTFE (same as in Example 1) powder 10% by weight, lithium carbonate (same as in Example 1) powder 3% by weight, copper powder 2% in average particle size 3 μm And 3% by weight of conductive carbon black (“Ketjen Black EC600JD (trade name)” manufactured by Lion Akzo Co., Ltd.) powder are added to a super mixer and mixed to obtain 82% by weight of PPS powder, 10% by weight of PTFE powder, A mixed powder comprising 3% by weight of lithium carbonate powder, 2% by weight of copper powder and 3% by weight of conductive carbon black powder was obtained. This mixed powder is molded by a screw in-line type injection molding machine under the conditions of a molding temperature of 270 to 300 ° C. and an injection molding pressure of 800 kg / cm 2 , and a cylindrical sliding member (slip) having an inner diameter of 23 mm, an outer diameter of 29 mm, and a length of 6 mm. Bearing).
[0049]
<Examples 18-20, Examples 22-24, Comparative Examples 7-9>
In Example 17, a cylindrical sliding member (sliding bearing) having an inner diameter of 23 mm, an outer diameter of 29 mm, and a length of 6 mm was obtained in the same manner as in Example 17 except that the composition was changed as shown in Tables 10 to 12. Produced. A zinc powder having an average particle size of 45 μm was used as the zinc powder, and a copper oxide powder having an average particle size of 7 μm was used as the copper oxide powder.
[0050]
<Example 21>
PEK (same as in Example 13) powder, PTFE (same as in Example 1) powder 30% by weight, lithium carbonate (same as in Example 1) powder 5% by weight, copper powder 2% in average particle size 3 μm % And 5% by weight of conductive carbon black (same as Example 17 above) were added to a super mixer and mixed to obtain 58% by weight of PEK powder, 30% by weight of PTFE powder, 5% by weight of lithium carbonate powder, and 2% by weight of copper powder. % And 5% by weight of conductive carbon black were obtained. This mixed powder is molded by a screw in-line type injection molding machine under conditions of a molding temperature of 350 to 400 ° C. and an injection molding pressure of 800 kg / cm 2 , and is a cylindrical sliding member (slip) having an inner diameter of 23 mm, an outer diameter of 29 mm, and a length of 6 mm. Bearing).
[0051]
A journal test was performed on the cylindrical sliding members produced in Examples 17 to 24 and Comparative Examples 7 to 9 described above under the conditions shown in Table 9. The results are shown in Tables 10 to 12.
[0052]
[Table 9]
Sliding speed 5.2m / min
Load 4.4 kgf / cm 2
Mating material Aluminum alloy (A5052-H34)
Counterpart surface roughness 3μmR Z
Test time 24 hours lubrication No lubrication test ambient temperature 185 ℃
(The following margin)
[0053]
[Table 10]
Figure 0005036016
[0054]
[Table 11]
Figure 0005036016
[0055]
[Table 12]
Figure 0005036016
[0056]
In the above table, the amount of wear indicates the amount of dimensional change of the sliding member. For the volume resistivity, a conductive paint was applied to both ends of the molded product, and the resistance at both ends was measured after drying according to JIS K6911. In the evaluation of the degree of damage on the surface of the mating member, as in the case of the evaluation described above, the case where no damage was observed was indicated by a mark ◯, and the case where damage was recognized was indicated by a mark X.
[0057]
From the above test results, in the sliding members of Examples 17 to 24, no damage was observed on the surface of the mating material after the test, and a good mixed film of PTFE and copper powder, zinc powder or copper oxide powder was obtained. It was confirmed that it was formed, and it showed very good performance in terms of friction and wear characteristics. On the other hand, the sliding member of Comparative Example 7 was confirmed to have a large amount of wear although no damage was observed on the surface of the counterpart material, and the sliding members of Comparative Example 8 and Comparative Example 9 had a slight amount on the surface of the counterpart material. Damage was observed and it was confirmed that the amount of wear was large.
[0058]
【Effect of the invention】
According to the present invention described above, a resin composition for a sliding member and a slide bearing exhibiting excellent frictional wear characteristics from a normal temperature to a high temperature atmosphere by appropriately selecting a synthetic resin according to the use of the sliding member. Is provided.

Claims (5)

合成樹脂に四フッ化エチレン樹脂5〜50重量%、炭酸塩0.1〜15重量%、銅粉末、亜鉛粉末および酸化銅粉末から選択される成分0.1〜15重量%が含有されている摺動部材用樹脂組成物であって、前記合成樹脂はポリアセタール樹脂、ポリアミド樹脂、ポリブチレンテレフタレート樹脂、ポリフェニレンサルファイド樹脂、ポリエーテルイミド樹脂、ポリエーテルスルホン樹脂、ポリシアノアリールエーテル樹脂、ポリエーテルケトン樹脂、ポリアミドイミド樹脂、ポリイミド樹脂から選択されることを特徴とする摺動部材用樹脂組成物。  The synthetic resin contains 5 to 50% by weight of tetrafluoroethylene resin, 0.1 to 15% by weight of carbonate, and 0.1 to 15% by weight of a component selected from copper powder, zinc powder and copper oxide powder. A resin composition for a sliding member, wherein the synthetic resin is polyacetal resin, polyamide resin, polybutylene terephthalate resin, polyphenylene sulfide resin, polyetherimide resin, polyethersulfone resin, polycyanoaryl ether resin, polyetherketone resin A resin composition for a sliding member, wherein the resin composition is selected from polyamideimide resin and polyimide resin. 炭酸塩は、アルカリ金属あるいはアルカリ土類金属の炭酸塩である請求項1に記載の摺動部材用樹脂組成物。  The resin composition for a sliding member according to claim 1, wherein the carbonate is an alkali metal or alkaline earth metal carbonate. 炭酸塩は、炭酸リチウム、炭酸カルシウム、炭酸マグネシウム、炭酸バリウム、炭酸ナトリウム、炭酸カリウムから選択される請求項2に記載の摺動部材用樹脂組成物。The resin composition for a sliding member according to claim 2, wherein the carbonate is selected from lithium carbonate, calcium carbonate, magnesium carbonate, barium carbonate, sodium carbonate, and potassium carbonate. 導電性カーボンブラックが1〜10重量%含有されている請求項1から3のいずれか一項に記載の摺動部材用樹脂組成物。The resin composition for a sliding member according to any one of claims 1 to 3, wherein 1 to 10% by weight of conductive carbon black is contained. 請求項1から4のいずれか一項に記載の摺動部材用樹脂組成物を成形してなるすべり軸受。A sliding bearing formed by molding the resin composition for a sliding member according to any one of claims 1 to 4.
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