JP6681696B2 - Sliding materials and plain bearings - Google Patents
Sliding materials and plain bearings Download PDFInfo
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- JP6681696B2 JP6681696B2 JP2015215252A JP2015215252A JP6681696B2 JP 6681696 B2 JP6681696 B2 JP 6681696B2 JP 2015215252 A JP2015215252 A JP 2015215252A JP 2015215252 A JP2015215252 A JP 2015215252A JP 6681696 B2 JP6681696 B2 JP 6681696B2
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- 239000000463 material Substances 0.000 title claims description 32
- 229920005989 resin Polymers 0.000 claims description 49
- 239000011347 resin Substances 0.000 claims description 49
- 229920001470 polyketone Polymers 0.000 claims description 37
- 125000001931 aliphatic group Chemical group 0.000 claims description 33
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 229940119170 jojoba wax Drugs 0.000 claims description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 238000009835 boiling Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 9
- 235000014113 dietary fatty acids Nutrition 0.000 description 9
- 229930195729 fatty acid Natural products 0.000 description 9
- 239000000194 fatty acid Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- -1 polybutylene terephthalate Polymers 0.000 description 8
- 230000013011 mating Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 231100000241 scar Toxicity 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 235000004035 Cryptotaenia japonica Nutrition 0.000 description 1
- 244000146493 Cryptotaenia japonica Species 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- 241000221095 Simmondsia Species 0.000 description 1
- 235000004433 Simmondsia californica Nutrition 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000007824 aliphatic compounds Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001643 poly(ether ketone) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000009725 powder blending Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、摺動材に関し、特に滑り軸受に好適な摺動材に関する。 The present invention relates to a sliding material, and particularly to a sliding material suitable for a sliding bearing.
従来、滑り軸受用の摺動材として、合成樹脂製の摺動材が知られている。例えば、特許文献１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、およびポリイミド樹脂から選択されるベース樹脂に、ポリテトラフルオロエチレン樹脂、炭酸塩、銅粉末、亜鉛粉末、および酸化銅粉末から選択される充填剤を配合することにより形成された滑り軸受用の摺動材が開示されている。 BACKGROUND ART Conventionally, a sliding material made of synthetic resin has been known as a sliding material for sliding bearings. For example, in Patent Document 1, polyacetal resin, polyamide resin, polybutylene terephthalate resin, polyphenylene sulfide resin, polyetherimide resin, polyethersulfone resin, polycyanoaryl ether resin, polyetherketone resin, polyamideimide resin, and polyimide. A sliding material for a sliding bearing formed by blending a base resin selected from resins with a filler selected from polytetrafluoroethylene resin, carbonate, copper powder, zinc powder, and copper oxide powder is used. It is disclosed.
近年、同等の耐熱性を有する他の合成樹脂と比べて原料のモノマーが安価な脂肪族ポリケトン樹脂が注目されている。しかしながら、脂肪族ポリケトン樹脂は、耐熱性および耐薬品性に優れているが、摩擦係数が高く、かつ摩耗量も多いため、脂肪族ポリケトン樹脂単体では滑り軸受用の摺動材に適していない。 In recent years, aliphatic polyketone resins, which are cheaper in raw material monomers than other synthetic resins having the same heat resistance, have attracted attention. However, although the aliphatic polyketone resin is excellent in heat resistance and chemical resistance, the aliphatic polyketone resin alone is not suitable as a sliding material for a sliding bearing because it has a high friction coefficient and a large amount of wear.
本発明は上記事情に鑑みてなされたものであり、その目的は、耐熱性および耐薬品性に優れ、かつ他の合成樹脂製の摺動材に比べて安価な脂肪族ポリケトン樹脂を用いた摺動材を提供することにある。 The present invention has been made in view of the above circumstances, and an object thereof is a slide using an aliphatic polyketone resin that is excellent in heat resistance and chemical resistance, and is cheaper than other synthetic resin sliding materials. To provide moving materials.
本発明者は、脂肪族ポリケトン樹脂に油性剤を配合することにより、摺動性能を向上させることができることを見出した。ここで、摺動材成形時の高温状態で、脂肪族ポリケトン樹脂に配合された油性剤が気化するのを防止するため、脂肪族ポリケトン樹脂に配合する油性剤は、脂肪族ポリケトン樹脂の融点より高い沸点を有するホホバオイルを用いる。
The present inventor has found that by blending an aliphatic polyketone resin with an oiliness agent, sliding performance can be improved. Here, in order to prevent vaporization of the oily agent blended in the aliphatic polyketone resin in a high temperature state during molding of the sliding material, the oily agent blended in the aliphatic polyketone resin is more than the melting point of the aliphatic polyketone resin. Jojoba oil with a high boiling point is used .
本発明によれば、油性剤を配合した脂肪族ポリケトン樹脂を用いることにより、摺動性能を向上させることができるので耐熱性および耐薬品性に優れ、かつ他の合成樹脂製の摺動材に比べて安価な脂肪族ポリケトン樹脂を用いた摺動材を提供できる。 According to the present invention, by using an aliphatic polyketone resin mixed with an oiliness agent, it is possible to improve the sliding performance, so that it is excellent in heat resistance and chemical resistance, and to other sliding materials made of synthetic resin. By comparison, it is possible to provide a sliding material using an inexpensive aliphatic polyketone resin.
以下に、本発明の実施の形態について説明する。 Embodiments of the present invention will be described below.
本実施の形態に係る摺動材は、高級脂肪酸、高級アルコール、アミン、エステル、金属石けん等の油性剤が配合された脂肪族ポリケトン樹脂により形成されている。ここで、摺動材の成形に際して脂肪族ポリケトン樹脂に配合された油性剤が気化するのを防止するため、脂肪族ポリケトン樹脂に配合する油性剤は、脂肪族ポリケトン樹脂の融点（２４０度）より高い沸点を有するものを用いる。また、油性剤は脂肪酸、脂肪酸エステル、あるいはアルコールを含むものが好ましく、例えばホホバオイルを用いることができる。 The sliding material according to the present embodiment is formed of an aliphatic polyketone resin mixed with an oily agent such as higher fatty acid, higher alcohol, amine, ester, and metallic soap. Here, in order to prevent the oily agent blended in the aliphatic polyketone resin from vaporizing during the molding of the sliding material, the oily agent blended in the aliphatic polyketone resin is more than the melting point (240 degrees) of the aliphatic polyketone resin. Use one with a high boiling point. The oiliness agent preferably contains a fatty acid, a fatty acid ester, or an alcohol, and for example, jojoba oil can be used.
また、脂肪族ポリケトン樹脂に配合する油性剤の摺動材に対する割合は、１〜１０質量％とすることが好ましい。油性剤の摺動材に対する割合が１質量％未満である場合、脂肪族ポリケトン樹脂単体の場合に比べて、摺動性能に有意な差は生じない。一方、油性剤の摺動材に対する割合が大きくなるにつれて、油性剤が脂肪族ポリケトン樹脂中に均等に分散しない場合がある。 Further, the ratio of the oiliness agent to be mixed with the aliphatic polyketone resin to the sliding material is preferably 1 to 10% by mass. When the ratio of the oily agent to the sliding material is less than 1% by mass, no significant difference in sliding performance occurs as compared with the case of using the aliphatic polyketone resin alone. On the other hand, as the ratio of the oily agent to the sliding material increases, the oily agent may not be uniformly dispersed in the aliphatic polyketone resin.
そこで、油性剤を炭素粉末、黒鉛粉末等の保持剤に保持させ、この保持剤を脂肪族ポリケトン樹脂に配合することにより、油性剤を脂肪族ポリケトン樹脂から分離させずに、脂肪族ポリケトン樹脂内により均等に分散させることができる。 Therefore, the oiliness agent is held in a holding agent such as carbon powder or graphite powder, and this holding agent is blended with the aliphatic polyketone resin, so that the oiliness agent is not separated from the aliphatic polyketone resin and Can be evenly dispersed.
本発明者は、本実施の形態に係る摺動材に対して各種試験を行った。 The inventor conducted various tests on the sliding material according to the present embodiment.
なお、各種試験に用いる摺動材の材料として、ポリケトン樹脂に、Ｈｙｏｓｕｎｇ社製「Ｍ３３０Ａ（商品名）」を用い、ホホバオイルに、ミツバ貿易社の輸入品「ホホバゴールデン（商品名）」を用い、炭素粉末に、エア・ウォーター・ベルパール社製「ベルパール（登録商標）Ｃ２０００（商品名）」を用い、そして、ＰＴＦＥ（ポリテトラフルオロエチレン）粉末に、喜多村社製「ＫＴＬ６２０（商品名）」を用いている。 As a material of the sliding material used in various tests, "M330A (trade name)" manufactured by Hyosung was used for polyketone resin, and "Jojoba Golden (trade name)" imported by Mitsuba Trading Co., Ltd. was used for jojoba oil. "Bellpearl (registered trademark) C2000 (trade name)" manufactured by Air Water Bell Pearl Co., Ltd. is used as the carbon powder, and "KTL620 (trade name) manufactured by Kitamura Co., Ltd. is used as the PTFE (polytetrafluoroethylene) powder. I am using.
図１は、本実施の形態に係る摺動材の摺動性能試験を説明するための図である。 FIG. 1 is a diagram for explaining a sliding performance test of a sliding member according to this embodiment.
図示するように、本発明者は、本実施の形態に係る摺動材としてプレート状の試験片１を用意し、この試験片１の摺動面（表面）１０上に筒状の相手材２を載置した。そして、以下の表１に示す条件において、軸心Ｏ方向の荷重Ｎを試験片１の裏面１１に加えて、試験片１の摺動面１０を相手部材２の支持対象面（端面）２０に押し当てながら、軸心Ｏ回りの回転方向Ｒに相手材２を回転させ、そのときの摺動部材２の回転方向Ｒにおけるトルクを、図示していないロードセルで検出し、この検出トルクから、摺動面１０および支持対象面２０間の摩擦係数を測定する試験を行った。また、試験後に、摺動面１０の矢印Ａにおける摩耗痕深さ（摩耗痕断面曲線）を測定した。なお、相手材２の支持対象面２０は、研削加工した後、耐水研磨紙＃４００等でハンドラッピングし、さらにアセトンにて洗浄した。
As shown in the figure, the present inventor prepares a plate-shaped test piece 1 as a sliding member according to the present embodiment, and a
また、以下の表２に示すように、試験片１として４種類の配合比の試験片１−１〜１−４を用意するとともに、その比較例として２種類の比較例１−５、１−６を用意した。また、これらの試験片１−１〜１−４および比較例１−５、１−６は、表２に示す配合比からなるペレットをプレート状に射出成形することにより作製した。具体的には、まず、二軸ベント式押出成形機に投入して溶融混練し、かつ成形して紐状の成形物を作製し、その後、この紐状の成形物を切断して混合ペレットを作製した。それから、この混合ペレットをスクリュー型射出成形機で成形して、表１に示す形状の試験片を作製した。 Further, as shown in Table 2 below, as test pieces 1, test pieces 1-1 to 1-4 having four kinds of compounding ratios are prepared, and as comparison examples, two kinds of comparative examples 1-5 and 1- 6 was prepared. Further, these test pieces 1-1 to 1-4 and Comparative Examples 1-5 and 1-6 were produced by injection-molding pellets having the compounding ratios shown in Table 2 into a plate shape. Specifically, first, the mixture is charged into a twin-screw vent extruder, melt-kneaded, and molded to produce a string-shaped molded product, and then the string-shaped molded product is cut to obtain mixed pellets. It was made. Then, the mixed pellets were molded by a screw type injection molding machine to prepare test pieces having the shapes shown in Table 1.
図２は、表１に示す条件にて、表２に示す試験片１−１〜１−４および比較例１−５、１−６に対して行った摺動性能試験の測定結果を示す図である。ここで、左側の縦軸は摩擦係数を示しており、右側の縦軸は比摩耗量を示している。比摩耗量は、摺動面１０の矢印Ａにおける摩耗痕深さの平均値に摩耗痕面積（摺動面１０と支持対象面２０との接触面積）を掛けて摩耗体積を求め、さらにこの摩耗体積を荷重Ｎおよび試験終了時における滑り距離で割ることにより求めた。
FIG. 2 is a diagram showing measurement results of a sliding performance test performed on the test pieces 1-1 to 1-4 and comparative examples 1-5 and 1-6 shown in Table 2 under the conditions shown in Table 1. Is. Here, the left vertical axis represents the coefficient of friction, and the right vertical axis represents the specific wear amount. The specific amount of wear is obtained by multiplying the average value of the wear mark depth of the sliding
図２において、グラフ３−１〜３−４は、試験片１−１〜１−４の摩擦係数の測定結果を示しており、グラフ３−５、３−６は、比較例１−５、１−６の摩擦係数の測定結果を示している。また、グラフ４−１〜４−４は、試験片１−１〜１−４の比摩耗量の測定結果を示しており、グラフ４−５、４−６は、比較例１−５、１−６の比摩耗量の測定結果を示している。 In FIG. 2, graphs 3-1 to 3-4 show the measurement results of the friction coefficient of the test pieces 1-1 to 1-4, and graphs 3-5 and 3-6 are comparative examples 1-5, The measurement result of the friction coefficient of 1-6 is shown. Graphs 4-1 to 4-4 show the measurement results of the specific wear amount of the test pieces 1-1 to 1-4, and graphs 4-5 and 4-6 show comparative examples 1-5 and 1. The measurement result of the specific wear amount of -6 is shown.
図示するように、脂肪族ポリケトン樹脂１００質量％の比較例１−６の摩擦係数は０．５４である（グラフ３−６）。また、ホホバオイルを０．５質量％配合した試験片１−１の摩擦係数は０．５３である（グラフ３−１）。したがって、０．５質量％程度のホホバオイルの配合では、脂肪族ポリケトン樹脂１００質量％に対して摩擦係数に有意な差は見られなかった。一方、ホホバオイルを２質量％配合した試験片１−２の摩擦係数は０．０７（グラフ３−２）、３質量％配合した試験片１−３、１−４の摩擦係数は０．０８、０．０７であり（グラフ３−３、３−４）、脂肪族ポリケトン樹脂１００質量％に比べて圧倒的に小さく、ＰＴＦＥ粉末を１５質量％配合した比較例１−５の摩擦係数０．１９（グラフ３−５）と比べても十分に小さい。ここで、試験片１−１は炭素粉末を１質量％配合し、試験片１−４は炭素粉末を０．３質量％配合している。一方、試験片１−２、１−３は、炭素粉末を配合していない。これらの試験片１−１〜１−４のグラフ３−１〜３−４から明らかなように、炭素粉末の配合による摩擦係数への影響は見られなかった。 As illustrated, the friction coefficient of Comparative Example 1-6 containing 100% by mass of the aliphatic polyketone resin is 0.54 (graph 3-6). The friction coefficient of the test piece 1-1 containing 0.5% by mass of jojoba oil is 0.53 (graph 3-1). Therefore, when the amount of jojoba oil was about 0.5% by mass, no significant difference was found in the friction coefficient with respect to 100% by mass of the aliphatic polyketone resin. On the other hand, the friction coefficient of the test piece 1-2 containing 2% by mass of jojoba oil is 0.07 (graph 3-2), and the friction coefficient of the test pieces 1-3, 1-4 containing 3% by mass is 0.08. , 0.07 (graphs 3-3, 3-4), which is overwhelmingly smaller than 100% by mass of the aliphatic polyketone resin, and a friction coefficient of 0. 19 (graph 3-5), it is sufficiently small. Here, the test piece 1-1 contains 1 mass% of carbon powder, and the test piece 1-4 contains 0.3 mass% of carbon powder. On the other hand, the test pieces 1-2 and 1-3 do not contain carbon powder. As is clear from the graphs 3-1 to 3-4 of these test pieces 1-1 to 1-4, the effect of the carbon powder blending on the friction coefficient was not observed.
また、脂肪族ポリケトン樹脂１００質量％の比較例１−６の比摩耗量は１１．８×１０−６ｍｍ３／Ｎｍである（グラフ４−６）。一方、ホホバオイルを０．５質量％配合した試験片１−１の比摩耗量は１０．６×１０−６ｍｍ３／Ｎｍであり（グラフ４−１）、ホホバオイルを２質量％配合した試験片１−２の比摩耗量は０．２５×１０−６ｍｍ３／Ｎｍであり（グラフ４−２）、ホホバオイルを３質量％配合した試験片１−３、１−４の比摩耗量は０．３５×１０−６ｍｍ３／Ｎｍ、０．２５×１０−６ｍｍ３／Ｎｍである（グラフ４−３、４−４）。上述したように、試験片１−１は、炭素粉末を１質量％配合し、試験片１−４は炭素粉末を０．３質量％配合している。一方、試験片１−２、１−３は、炭素粉末を配合していない。これらの試験片１−１〜１−４および比較例１−６のグラフ４−１〜４−４、４−６から明らかなように、０．５質量％のホホバオイルの配合では、脂肪族ポリケトン樹脂１００質量％に対して比摩耗量を十分に小さくすることはできないが、２質量％以上のホホバオイルの配合では、炭素粉末の配合の有無に関わらず、脂肪族ポリケトン樹脂１００質量％に対して比摩耗量を十分に小さくすることができた。 The specific wear amount of Comparative Example 1-6 containing 100% by mass of the aliphatic polyketone resin is 11.8 × 10 −6 mm 3 / Nm (Graph 4-6). On the other hand, the specific wear amount of the test piece 1-1 containing 0.5% by mass of jojoba oil was 10.6 × 10 −6 mm 3 / Nm (graph 4-1), and 2% by mass of jojoba oil was mixed. The specific wear amount of the test piece 1-2 is 0.25 × 10 −6 mm 3 / Nm (graph 4-2), and the specific wear amount of the test pieces 1-3 and 1-4 containing 3% by mass of jojoba oil. the amount is 0.35 × 10 -6 mm 3 /Nm,0.25×10 -6 mm 3 / Nm ( graph 4-3 and 4-4). As described above, the test piece 1-1 contains 1 mass% of carbon powder, and the test piece 1-4 contains 0.3 mass% of carbon powder. On the other hand, the test pieces 1-2 and 1-3 do not contain carbon powder. As is clear from these test pieces 1-1 to 1-4 and graphs 4-1 to 4-4 and 4-6 of Comparative Example 1-6, in the formulation of jojoba oil of 0.5% by mass, an aliphatic compound was used. Although it is not possible to make the specific wear amount sufficiently small with respect to 100% by mass of polyketone resin, if the content of jojoba oil is 2% by mass or more, it is possible to obtain 100% by mass of aliphatic polyketone resin regardless of whether carbon powder is mixed or not. On the other hand, the specific wear amount could be made sufficiently small.
したがって、上述の試験結果から、ホホバオイルを１質量％以上配合することにより、脂肪族ポリケトン樹脂１００質量％に対して摺動性能を向上させることができ、これにより、滑り軸受に利用できるものと考えられる。また、炭素粉末あるいは黒鉛粉末等をホホバオイルの保持剤として利用することにより、より多くの油性剤を脂肪族ポリケトン樹脂から分離させることなく均等に分散させて配合することができ、これにより、保持剤を利用しない場合に比べて摺動性能の更なる向上を期待できる。 Therefore, from the above-mentioned test results, by adding jojoba oil in an amount of 1% by mass or more, the sliding performance can be improved with respect to 100% by mass of the aliphatic polyketone resin, and thus it can be used for a sliding bearing. Conceivable. Further, by using carbon powder or graphite powder or the like as a retaining agent for jojoba oil, it is possible to uniformly disperse and blend more oily agents without separating from the aliphatic polyketone resin. Further improvement in sliding performance can be expected compared to the case where no agent is used.
以上説明したように、本実施の形態によれば、油性剤であるホホバオイルを配合した脂肪族ポリケトン樹脂を用いることにより、摺動性能を向上させることがきるので耐熱性および耐薬品性に優れ、かつ同等の耐熱性を有する他の合成樹脂製の摺動材に比べて安価な脂肪族ポリケトン樹脂を用いた摺動材を提供できる。 As described above, according to the present embodiment, by using the aliphatic polyketone resin containing jojoba oil, which is an oiliness agent, it is possible to improve the sliding performance, and thus the heat resistance and the chemical resistance are excellent. It is also possible to provide a sliding material using an aliphatic polyketone resin that is cheaper than other synthetic resin sliding materials having equivalent heat resistance.
これは以下の理由によると考えられる。すなわち、脂肪族ポリケトン樹脂は、ケトンが多数連結されたものであり、以下の化１に示すように、主鎖にカルボニル基が配置されている。 This is considered to be due to the following reasons. That is, the aliphatic polyketone resin is one in which a large number of ketones are linked, and a carbonyl group is arranged in the main chain as shown in Chemical formula 1 below.
ここで、カルボニル基は、以下の化２に示すように、炭素Ｃおよび酸素Ｏがそれぞれ＋、−に帯電して分極している。
Here, the carbonyl group is polarized by carbon C and oxygen O being charged to + and-, respectively, as shown in
このように、脂肪族ポリケトン樹脂は極性を持った樹脂と考えられ、脂肪族ポリケトン樹脂の表面は他の物質と結合しやすい活性な状態にあるものと考えられる。 As described above, the aliphatic polyketone resin is considered to be a resin having polarity, and the surface of the aliphatic polyketone resin is considered to be in an active state where it is easily bonded to other substances.
ホホバオイルは、以下の化３に示す脂肪酸エステルを有する。化３のＲ１、Ｒ２は、長鎖の炭化水素基であることを示す。 Jojoba oil has the fatty acid ester shown in Chemical formula 3 below. R 1 and R 2 in Chemical formula 3 are long-chain hydrocarbon groups.
脂肪酸エステルも炭素-酸素の結合を持ち、極性を有していると考えられる。このため、脂肪酸エステルを含むホホバオイルは、極性が高い脂肪族ポリケトン樹脂の表面に保持されて油性剤としての潤滑効果を発揮すると考えられる。また、同様に極性を有していると考えられる脂肪酸、アルコール等でも、同様の潤滑効果が期待できる。ここで、油性剤の効果を発揮する構造としては、長鎖の炭化水素基を有する脂肪酸エステル、脂肪酸、アルコールであることが望ましいと考えられる。 The fatty acid ester also has a carbon-oxygen bond and is considered to have polarity. Therefore, it is considered that the jojoba oil containing the fatty acid ester is retained on the surface of the aliphatic polyketone resin having high polarity and exhibits a lubricating effect as an oiliness agent. Further, similar lubricating effects can be expected with fatty acids, alcohols, etc., which are also considered to have polarities. Here, it is considered preferable that the structure exerting the effect of the oiliness agent is a fatty acid ester having a long-chain hydrocarbon group, a fatty acid, or an alcohol.
本発明の摺動材は、様々な摺動機構に用いることができる。特に、滑り軸受に好適である。 The sliding member of the present invention can be used for various sliding mechanisms. In particular, it is suitable for plain bearings.
１：摺動材、 ２：相手材、１０：摺動材１の摺動面（表面）、 １１：摺動材１の裏面、 ２０：相手材２の支持対象面（端面）
1: Sliding material, 2: Mating material, 10: Sliding surface (front surface) of sliding material 1, 11: Back surface of sliding material 1, 20: Support target surface (end surface) of
Claims (4)
前記脂肪族ポリケトン樹脂に配合され、当該脂肪族ポリケトン樹脂の融点より高い沸点を有する油性剤と、を有し、
前記油性剤は、ホホバオイルである
ことを特徴とする摺動材。 An aliphatic polyketone resin,
The formulated in polyketone resins, possess an oily agent having a boiling point higher than the melting point of the polyketone resin, a
The sliding material , wherein the oily agent is jojoba oil .
さらに保持剤が配合されている
ことを特徴とする摺動材。 The sliding member according to claim 1,
A sliding material characterized by further containing a holding agent.
前記保持剤は、炭素粉末あるいは黒鉛粉末である
ことを特徴とする摺動材。 The sliding material according to claim 2 ,
The holding material is a carbon powder or a graphite powder.
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