JP2005336017A - Porous carbon material, filter, and filter for fuel pump - Google Patents
Porous carbon material, filter, and filter for fuel pump Download PDFInfo
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- JP2005336017A JP2005336017A JP2004158652A JP2004158652A JP2005336017A JP 2005336017 A JP2005336017 A JP 2005336017A JP 2004158652 A JP2004158652 A JP 2004158652A JP 2004158652 A JP2004158652 A JP 2004158652A JP 2005336017 A JP2005336017 A JP 2005336017A
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- filter
- carbon material
- porous carbon
- fuel pump
- binder
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- 239000003575 carbonaceous material Substances 0.000 title claims abstract description 32
- 239000000446 fuel Substances 0.000 title claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000011230 binding agent Substances 0.000 claims abstract description 12
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 10
- 238000004898 kneading Methods 0.000 claims abstract description 8
- 230000005484 gravity Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 7
- 238000002156 mixing Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 9
- 238000000465 moulding Methods 0.000 description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 description 7
- 229920002451 polyvinyl alcohol Polymers 0.000 description 7
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 229910021383 artificial graphite Inorganic materials 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000011295 pitch Substances 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000011300 coal pitch Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- -1 etc.) Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000011339 hard pitch Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 235000011835 quiches Nutrition 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Ceramic Products (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
Description
本発明は、多孔質炭素材料、この多孔質炭素材料を用いたフィルター及び燃料ポンプ用フィルターに関するものである。 The present invention relates to a porous carbon material, a filter using the porous carbon material, and a fuel pump filter.
従来から、自動車、航空機等の輸送手段（以下，単に自動車という。）の燃料供給系として、燃料タンク内に貯蔵された燃料をポンプで燃料ポンプ用フィルター（以下，フィルターという。）に送り、このフィルターにより粗い金属粉、固形物等の粒子を除去し、そして、分別、精製された清浄な燃料を燃焼室に噴射するという方式が採用されている。このフィルターとしては、布製品あるいは下記特許文献１に示されるような活性炭が用いられていた。
しかし、布製品をフィルターとして用いると、布製品を構成する繊維が長期間の使用により強度低下し切断され短繊維となって燃料中に混入する場合があった。同様に活性炭をフィルターとして使用すると、活性炭を構成する炭素粒子が脱離、脱落し、やはり燃料中に混入するという問題があった。一方、きめの細かい材料を用いてフィルターを構成すると燃料ポンプ中に含まれる上記、金属の不純物は十分に除去できる。しかしながら、フィルターとしての効率が低下するだけでなく、すぐに目詰まりを起こすのでフィルターを頻繁に交換する必要があった。 However, when the fabric product is used as a filter, the fibers constituting the fabric product may be reduced in strength due to long-term use and cut into short fibers that may be mixed into the fuel. Similarly, when activated carbon is used as a filter, there is a problem that carbon particles constituting the activated carbon are desorbed and dropped out and are mixed into the fuel. On the other hand, if the filter is made of a fine material, the metal impurities contained in the fuel pump can be sufficiently removed. However, not only the efficiency as a filter is reduced, but also the filter is quickly clogged, so that it is necessary to change the filter frequently.
そこで、本発明の目的は、所定の全気孔率を有する多孔質炭素材料と、この多孔質炭素材料を用いたフィルターと、この多孔質炭素材料を用いて、粒子脱落が少なく、燃料ポンプの性能を維持でき、長寿命且つ安価に製造できる燃料ポンプ用フィルターとを提供することである。 Therefore, an object of the present invention is to provide a porous carbon material having a predetermined total porosity, a filter using the porous carbon material, and the performance of the fuel pump with less particle dropout using the porous carbon material. And a fuel pump filter that can be manufactured at a low cost with a long lifetime.
本発明の多孔質炭素材料は、全気孔率が２０〜７０％のものであるが、３０〜６０％とすることがより好ましい。なお、全気孔率は多孔質炭素材料の真比重とかさ比重とから算出する。また、かさ比重が０．６〜１．２ｇ／ｃｍ３であることが好ましいが、０．８〜１．０ｇ／ｃｍ３とすることがより好ましい。かさ比重が０．６ｇ／ｃｍ３よりも小さいと強度不足となり形状を維持することが困難となる。また、かさ比重が１．２ｇ／ｃｍ３よりも大きいと、フィルター等として使用した場合に目詰まりを起こしやすくなるためである。なお、このかさ比重はＪＩＳ Ｒ７２２２−１９９７により求めた。また、本発明の多孔質炭素材料は、黒鉛粉末及び結合剤を混練した混練物を成形、熱処理してなるものであることが好ましい。または、黒鉛粉末及び結合剤を混練した混練物と、熱可塑性樹脂（例えば、ポリビニルアルコール樹脂（以下ＰＶＡ）、ポリイミド樹脂、ポリアミド樹脂等）、ピッチ、タールから選ばれる１種以上と、を混合、成形、熱処理してなるものであることが好ましく、さらに、前記混練物が４０〜８０％、さらに好ましくは５０〜７０％とし、残部が前記熱可塑性樹脂、ピッチ、タールであることが好ましい。 The porous carbon material of the present invention has a total porosity of 20 to 70%, more preferably 30 to 60%. The total porosity is calculated from the true specific gravity and bulk specific gravity of the porous carbon material. Moreover, although it is preferable that bulk specific gravity is 0.6-1.2 g / cm < 3 >, it is more preferable to set it as 0.8-1.0 g / cm < 3 >. If the bulk specific gravity is smaller than 0.6 g / cm 3 , the strength becomes insufficient and it becomes difficult to maintain the shape. Further, if the bulk specific gravity is larger than 1.2 g / cm 3 , clogging is likely to occur when used as a filter or the like. In addition, this bulk specific gravity was calculated | required by JISR7222-1997. In addition, the porous carbon material of the present invention is preferably formed by molding and heat-treating a kneaded product obtained by kneading graphite powder and a binder. Alternatively, a kneaded product obtained by kneading graphite powder and a binder and a thermoplastic resin (for example, polyvinyl alcohol resin (hereinafter referred to as PVA), polyimide resin, polyamide resin, etc.), pitch, and tar are mixed. It is preferable to be formed and heat-treated. Further, the kneaded product is preferably 40 to 80%, more preferably 50 to 70%, and the remainder is preferably the thermoplastic resin, pitch and tar.
本発明のフィルター及び燃料ポンプ用フィルターは、上記多孔質炭素材料を用いたものであることが好ましい。 The filter and the fuel pump filter of the present invention preferably use the porous carbon material.
本発明によれば、所定の全気孔率を有する多孔質炭素材料と、この多孔質炭素材料を用いたフィルターと、この多孔質炭素材料を用いて、粒子脱落が少なく、燃料ポンプの性能を維持でき、長寿命且つ安価に製造できる燃料ポンプ用フィルターとを提供できる。 According to the present invention, a porous carbon material having a predetermined total porosity, a filter using the porous carbon material, and using the porous carbon material, particle dropout is reduced and the performance of the fuel pump is maintained. It is possible to provide a fuel pump filter that can be manufactured at a low cost with a long lifetime.
以下に、本発明の実施形態に係る多孔質炭素材料の製造方法を説明する。本発明の多孔質炭素材料は、黒鉛粉末及び結合剤を混練した混練物を成形、熱処理してなるものである。以下、具体的に説明する。なお、黒鉛粉末としては、鱗片状黒鉛、土状黒鉛等の天然黒鉛あるいはキッシュ黒鉛、膨張黒鉛、さらには等方性黒鉛を微粉砕して得られた人造黒鉛が例示できる。なお、平均粒子直径が１０〜１００μｍ、好ましくは１０〜５０μｍの黒鉛粒子を使用することが好ましい。平均粒子直径が１０μｍよりも小さいと焼成時にクラックが生じ、平均粒子直径が１００μｍよりも大きいと強度不足となるからである。また、結合剤としては，コールタール、ピッチ、あるいはフェノール樹脂等の熱硬化性樹脂を例示できる。 Below, the manufacturing method of the porous carbon material which concerns on embodiment of this invention is demonstrated. The porous carbon material of the present invention is obtained by molding and heat-treating a kneaded product obtained by kneading graphite powder and a binder. This will be specifically described below. Examples of the graphite powder include natural graphite such as flake graphite and earthy graphite, quiche graphite, expanded graphite, and artificial graphite obtained by pulverizing isotropic graphite. In addition, it is preferable to use graphite particles having an average particle diameter of 10 to 100 μm, preferably 10 to 50 μm. This is because if the average particle diameter is smaller than 10 μm, cracks occur during firing, and if the average particle diameter is larger than 100 μm, the strength is insufficient. Examples of the binder include thermosetting resins such as coal tar, pitch, or phenol resin.
上記黒鉛粉末１００％と上記結合剤５０〜１００％とを配合、混練後、成形体を金型成型等の成形手段で成形し、この成形体を４００〜１０００℃で熱処理することにより、本発明の多孔質炭素材料は完成する。 After blending and kneading 100% of the graphite powder and 50-100% of the binder, the molded body is molded by molding means such as mold molding, and the molded body is heat-treated at 400-1000 ° C. The porous carbon material is completed.
次に、本発明の別実施形態に係る多孔質炭素材料の製造方法を説明する。本発明の多孔質炭素材料は、黒鉛粉末及び結合剤を混練した混練物と、熱可塑性樹脂、ピッチ、タールから選ばれる１種以上と、を混合、成形、熱処理してなるものである。以下、具体的に説明する。なお、黒鉛粉末及び結合剤としては、上記実施形態と同様のものが例示できる。 Next, the manufacturing method of the porous carbon material which concerns on another embodiment of this invention is demonstrated. The porous carbon material of the present invention is obtained by mixing, molding, and heat-treating a kneaded product obtained by kneading graphite powder and a binder and one or more selected from a thermoplastic resin, pitch, and tar. This will be specifically described below. In addition, as a graphite powder and a binder, the thing similar to the said embodiment can be illustrated.
まず、上記黒鉛粉末１００％と上記結合剤５０〜１００％とを配合、混練後、１０〜１００μｍの平均粒子直径に粉砕する。次に、粉砕された混練物と熱可塑性樹脂とを混合するが、その割合は混練物１００％に対して熱可塑性樹脂２０〜８０％とすることが好ましく、３０〜７０％とすることがさらに好ましい。この混練物と熱可塑性樹脂との混合物を、金型成型等の成形手段で成形体とし、この成形体を４００〜１０００℃、好ましくは５００〜８００℃で熱処理することにより、本発明の多孔質炭素材料は完成する。なお、粉砕された混練物と結合させるための熱可塑性樹脂としては、ＰＶＡが例示できる。この場合、熱可塑性樹脂としては炭化収率が１〜２０％の熱可塑性樹脂を使用することが好ましい。 First, 100% of the graphite powder and 50-100% of the binder are blended, kneaded, and then pulverized to an average particle diameter of 10-100 μm. Next, the pulverized kneaded product and the thermoplastic resin are mixed, and the ratio is preferably 20 to 80%, more preferably 30 to 70%, with respect to 100% of the kneaded product. preferable. The mixture of the kneaded material and the thermoplastic resin is formed into a molded body by molding means such as mold molding, and the molded body is heat-treated at 400 to 1000 ° C., preferably 500 to 800 ° C. The carbon material is completed. In addition, PVA can be illustrated as a thermoplastic resin for combining with the pulverized kneaded material. In this case, it is preferable to use a thermoplastic resin having a carbonization yield of 1 to 20% as the thermoplastic resin.
上記構成により、全気孔率が２０〜７０％、かさ比重が０．６〜１．２ｇ／ｃｍ３である多孔質炭素材料を提供できる。 With the above configuration, a porous carbon material having a total porosity of 20 to 70% and a bulk specific gravity of 0.6 to 1.2 g / cm 3 can be provided.
また、上記のようにして製造された多孔質炭素材料を用いたフィルターや燃料ポンプ用フィルターを提供できる。 Moreover, the filter using the porous carbon material manufactured as mentioned above and the filter for fuel pumps can be provided.
以下、本発明を実施例に基づき具体的に説明する。
（実施例１）
平均粒子直径が約３０μｍの人造黒鉛（真比重２．２３ｇ／ｃｍ３）５０％と、平均粒子直径が約３０μｍの人造黒鉛（真比重２．２１ｇ／ｃｍ３）５０％と、ハードピッチ７０％とを配合、混練し、粒子直径約５０μｍに粉砕した。この粉砕物にＰＶＡを５０％混合し、成形圧力１．０ｔ／ｃｍ２で金型成形し、この成形品を６００℃で、２４時間熱処理した。この熱処理品を実施例１の試料とした。
Hereinafter, the present invention will be specifically described based on examples.
(Example 1)
Artificial graphite having an average particle diameter of about 30 [mu] m and (true specific gravity 2.23g / cm 3) 50%, an average particle diameter of artificial graphite (true specific gravity 2.21 g / cm 3) to about 30 [mu] m 50% and a hard pitch 70% Were kneaded and pulverized to a particle diameter of about 50 μm. 50% of PVA was mixed with the pulverized product, and the mold was molded at a molding pressure of 1.0 t / cm 2. The molded product was heat-treated at 600 ° C. for 24 hours. This heat-treated product was used as the sample of Example 1.
（実施例２）
実施例２の試料は、ＰＶＡを２０％混合した以外、実施例１と同様の方法で作製した。
(Example 2)
The sample of Example 2 was produced in the same manner as in Example 1 except that 20% PVA was mixed.
（実施例３）
実施例３の試料は、焼成温度を８００℃とした以外、実施例１と同様の方法で作製した。
(Example 3)
The sample of Example 3 was produced by the same method as Example 1 except that the firing temperature was 800 ° C.
（比較例１）
比較例１の試料は、成形圧力を１．５ｔ／ｃｍ２として金型成形した以外、実施例１と同様の方法で作製した。
(Comparative Example 1)
The sample of Comparative Example 1 was produced in the same manner as in Example 1 except that the mold was molded at a molding pressure of 1.5 t / cm 2 .
（比較例２）
比較例２の試料は、粉砕物に混合するＰＶＡの量を８０％とした以外、実施例１と同様の方法で作製した。
(Comparative Example 2)
The sample of Comparative Example 2 was produced in the same manner as in Example 1 except that the amount of PVA mixed with the pulverized product was 80%.
（比較例３）
比較例３の試料は、粉砕物にＰＶＡを混合しないこと以外、実施例１と同様の方法で作製した。
(Comparative Example 3)
The sample of Comparative Example 3 was produced in the same manner as in Example 1 except that PVA was not mixed with the pulverized product.
以下に実施例１〜３及び比較例１〜３の試料の比較表を示す。 The comparative table of the samples of Examples 1 to 3 and Comparative Examples 1 to 3 is shown below.
上記表１より、比較例１〜３で得られた材料は、形状さえも維持できず、全気孔率も本発明の範囲外のものとなり、フィルター性能を満足できるものではないことがわかる。これに対し、実施例１〜３で得られた材料は、形状を維持でき、本発明の全気孔率範囲のものであり、フィルター性能を満足するものであることがわかる。 From Table 1 above, it can be seen that the materials obtained in Comparative Examples 1 to 3 cannot maintain even the shape, the total porosity is also outside the scope of the present invention, and the filter performance is not satisfactory. On the other hand, it can be seen that the materials obtained in Examples 1 to 3 can maintain the shape, are in the entire porosity range of the present invention, and satisfy the filter performance.
なお、本発明は、特許請求の範囲を逸脱しない範囲で設計変更できるものであり、上記実施形態や実施例に限定されるものではない。 The present invention can be changed in design without departing from the scope of the claims, and is not limited to the above-described embodiments and examples.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004158652A JP2005336017A (en) | 2004-05-28 | 2004-05-28 | Porous carbon material, filter, and filter for fuel pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004158652A JP2005336017A (en) | 2004-05-28 | 2004-05-28 | Porous carbon material, filter, and filter for fuel pump |
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| Publication Number | Publication Date |
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| JP2005336017A true JP2005336017A (en) | 2005-12-08 |
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| JP2004158652A Pending JP2005336017A (en) | 2004-05-28 | 2004-05-28 | Porous carbon material, filter, and filter for fuel pump |
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| JP (1) | JP2005336017A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103003474A (en) * | 2010-05-31 | 2013-03-27 | 西格里碳素欧洲公司 | Carbon body, method of producing carbon body and use thereof |
| US8728353B2 (en) | 2008-09-29 | 2014-05-20 | Asahi Organic Chemicals Industry Co., Ltd. | Burned plant material and electromagnetic shielding member |
-
2004
- 2004-05-28 JP JP2004158652A patent/JP2005336017A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8728353B2 (en) | 2008-09-29 | 2014-05-20 | Asahi Organic Chemicals Industry Co., Ltd. | Burned plant material and electromagnetic shielding member |
| CN103003474A (en) * | 2010-05-31 | 2013-03-27 | 西格里碳素欧洲公司 | Carbon body, method of producing carbon body and use thereof |
| JP2013533194A (en) * | 2010-05-31 | 2013-08-22 | エスゲーエル カーボン ソシエタス ヨーロピア | Carbon body, method for producing carbon body and use thereof |
| CN103003474B (en) * | 2010-05-31 | 2016-03-16 | 西格里碳素欧洲公司 | Carbon body, the method for producing carbon body and uses thereof |
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