JP2000264691A - Friction material - Google Patents
Friction materialInfo
- Publication number
- JP2000264691A JP2000264691A JP11071102A JP7110299A JP2000264691A JP 2000264691 A JP2000264691 A JP 2000264691A JP 11071102 A JP11071102 A JP 11071102A JP 7110299 A JP7110299 A JP 7110299A JP 2000264691 A JP2000264691 A JP 2000264691A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- fiber
- potassium titanate
- titanate
- aspect ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002783 friction material Substances 0.000 title claims abstract description 39
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000000835 fiber Substances 0.000 claims abstract description 28
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 14
- 239000012783 reinforcing fiber Substances 0.000 claims abstract description 11
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 8
- 238000005299 abrasion Methods 0.000 abstract description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 5
- 229920006231 aramid fiber Polymers 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- 229910052700 potassium Inorganic materials 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000003365 glass fiber Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011490 mineral wool Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 244000226021 Anacardium occidentale Species 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 235000020226 cashew nut Nutrition 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 239000012765 fibrous filler Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- IEKHISJGRIEHRE-UHFFFAOYSA-N 16-methylheptadecanoic acid;propan-2-ol;titanium Chemical compound [Ti].CC(C)O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O IEKHISJGRIEHRE-UHFFFAOYSA-N 0.000 description 1
- NLSFWPFWEPGCJJ-UHFFFAOYSA-N 2-methylprop-2-enoyloxysilicon Chemical compound CC(=C)C(=O)O[Si] NLSFWPFWEPGCJJ-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- UMHKOAYRTRADAT-UHFFFAOYSA-N [hydroxy(octoxy)phosphoryl] octyl hydrogen phosphate Chemical compound CCCCCCCCOP(O)(=O)OP(O)(=O)OCCCCCCCC UMHKOAYRTRADAT-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- YGUXVEHFNLRTTD-UHFFFAOYSA-N bis(sulfanylidene)antimony Chemical compound S=[Sb]=S YGUXVEHFNLRTTD-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- CEUFDOMMNXNEDK-UHFFFAOYSA-N sulfanyloxysilane Chemical compound [SiH3]OS CEUFDOMMNXNEDK-UHFFFAOYSA-N 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、摩擦材に関する。
本発明の摩擦材は、良好な摺動特性を示し、耐摩耗性に
優れ、高温に晒されても高い強度を維持し得るので、例
えば、自動車のディスクブレーキ、ドラムブレーキ、ク
ラッチフェーシング等の材料として有用である。[0001] The present invention relates to a friction material.
The friction material of the present invention exhibits good sliding characteristics, is excellent in abrasion resistance, and can maintain high strength even when exposed to high temperatures, so that, for example, materials such as automobile disk brakes, drum brakes, clutch facings, etc. Useful as
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来、
自動車のディスクブレーキ、ドラムブレーキ、クラッチ
フェーシング等に使用される摩擦材としては、フェノー
ル樹脂等の熱硬化性樹脂をマトリックスとし、これに繊
維状充填材としてガラス繊維やアラミド繊維等の強化用
繊維とチタン酸カリウム繊維とを配合し、更に黒鉛、硫
酸バリウム、アルミナ等の粒状充填材を配合したものが
汎用されている。繊維状充填材のうち、強化用繊維は主
に摩擦材の強度を確保するために、チタン酸カリウム繊
維は通常平均アスペクト比１０以上であり摩擦材に良好
な摺動特性を付与する目的で、それぞれ使用されてい
る。2. Description of the Related Art
The friction material used in automobile disc brakes, drum brakes, clutch facings, etc. is a thermosetting resin such as phenolic resin as a matrix, and a fibrous filler such as glass fiber or aramid fiber for reinforcing fibers. A material which is compounded with potassium titanate fiber and further compounded with a particulate filler such as graphite, barium sulfate, alumina or the like is widely used. Among the fibrous fillers, the reinforcing fibers are mainly for securing the strength of the friction material, and the potassium titanate fiber is usually 10 or more in average aspect ratio and for the purpose of imparting good sliding characteristics to the friction material, Each is used.
【０００３】しかしながら、チタン酸カリウム繊維を含
む摩擦材は、急激なブレーキング等によって高温に晒さ
れると、その強度が著しく低下する。これを防止するた
め、マトリックスである熱硬化性樹脂の配合量を増や
し、得られる摩擦材の気孔率を小さくし、緻密な構造に
することが行われている。この方法は強度の低下を防止
する上では有効である。しかしながら、マトリックスの
配合量を増加させると、必然的にチタン酸カリウム繊維
の配合量が減少するので、摺動性能が低下し、耐フェー
ド性や鳴き性能の悪化をもたらす。However, when a friction material containing potassium titanate fiber is exposed to a high temperature due to sudden braking or the like, its strength is significantly reduced. In order to prevent this, the amount of the thermosetting resin serving as the matrix is increased, the porosity of the obtained friction material is reduced, and a dense structure is performed. This method is effective in preventing a decrease in strength. However, when the amount of the matrix is increased, the amount of the potassium titanate fiber is inevitably reduced, so that the sliding performance is reduced and the fade resistance and the squealing performance are deteriorated.
【０００４】この様な欠点を解消するため、フェノール
樹脂等の熱硬化性樹脂をマトリックスとし、ガラス繊
維、アラミド繊維等の強化用繊維とチタン酸カリウム繊
維とを含む摩擦材において、アスペクト比８以下のチタ
ン酸カリウム粉末を配合した摩擦材が提案されている
（特開平４−３１８０９３号）。この摩擦材は、高温に
晒された際には、従来のものより機械的強度の低下は少
ないが、充分満足できるものではない。[0004] In order to solve such a drawback, a friction material containing a reinforcing fiber such as glass fiber or aramid fiber and a potassium titanate fiber using a thermosetting resin such as a phenol resin as a matrix and an aspect ratio of 8 or less is used. (Japanese Patent Application Laid-open No. Hei 4-318093) has been proposed. When this friction material is exposed to a high temperature, the mechanical strength is less reduced than the conventional one, but it is not sufficiently satisfactory.
【０００５】[0005]
【課題を解決するための手段】本発明者は、上記課題を
解決すべく鋭意研究を重ねた結果、新規な摩擦材を得る
ことに成功し、本発明を完成した。即ち本発明は、熱硬
化性樹脂をマトリックスとし且つ繊維成分としてチタン
酸カリウム繊維と強化用繊維とを含む摩擦材において、
平均アスペクト比が１〜５である立方体状又は板状のチ
タン酸カリウムとチタン酸ナトリウムとを配合したこと
を特徴とする摩擦材に係る。Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventor has succeeded in obtaining a new friction material and completed the present invention. That is, the present invention is a friction material containing a potassium titanate fiber and a reinforcing fiber as a fiber component and a thermosetting resin as a matrix,
The present invention relates to a friction material comprising a mixture of cubic or plate-like potassium titanate and sodium titanate having an average aspect ratio of 1 to 5.
【０００６】本発明によれば、特定の平均アスペクト比
を有する立方体状又は板状のチタン酸カリウムとチタン
酸ナトリウムとを併用することにより、優れた摺動特性
と耐摩耗性とを兼備し、急激なブレーキング等による高
温に晒されても強度が実質的に低下しない摩擦材が提供
される。従って、本発明の摩擦材は自動車のディスクブ
レーキ、ドラムブレーキ、クラッチフェーシング等は勿
論のこと、鉄道車両、航空機、産業機械類等の各種輸送
機器類のブレーキ材としても有用である。尚、立方体状
又は板状のチタン酸カリウム又はチタン酸ナトリウム単
独では、この様な顕著な効果は得られない。According to the present invention, a combination of cubic or plate-like potassium titanate and sodium titanate having a specific average aspect ratio is used to provide both excellent sliding characteristics and wear resistance. A friction material whose strength does not substantially decrease even when exposed to high temperatures due to sudden braking or the like is provided. Therefore, the friction material of the present invention is useful not only for disc brakes, drum brakes, clutch facings, etc. of automobiles, but also as brake materials for various transportation equipment such as railway vehicles, aircraft, industrial machines and the like. Note that such a remarkable effect cannot be obtained by using cubic or plate-like potassium titanate or sodium titanate alone.
【０００７】[0007]
【発明の実施の形態】本発明の摩擦材において、マトリ
ックスとなる熱硬化性樹脂としては、この分野で常用さ
れる公知のものを使用でき、例えば、フェノール樹脂、
ホルムアルデヒド樹脂、エポキシ樹脂、これらのカシュ
ー油変性樹脂等を挙げることができる。熱硬化性樹脂の
配合量は特に制限されず、適宜選択できるが、通常５〜
４０重量％程度、好ましくは１５〜３０重量％程度とす
ればよい。BEST MODE FOR CARRYING OUT THE INVENTION In the friction material of the present invention, as a thermosetting resin serving as a matrix, known ones commonly used in this field can be used.
Examples include formaldehyde resins, epoxy resins, and cashew oil-modified resins thereof. The blending amount of the thermosetting resin is not particularly limited and can be appropriately selected.
It may be about 40% by weight, preferably about 15 to 30% by weight.
【０００８】強化用繊維としても公知のものを使用で
き、例えば、ガラス繊維、ロックウール、アラミド繊
維、スチール繊維、ステンレス繊維、銅繊維、黄銅繊
維、セラミックス繊維、ロックウール、炭素繊維、木質
パルプ等を挙げることができ、これらの中でもガラス繊
維、ロックウール、アラミド繊維等が好ましい。強化用
繊維は１種を単独で使用でき又は２種以上を併用でき
る。強化用繊維の配合量は特に制限されず適宜選択でき
るが、得られる摩擦材の機械的強度等を考慮すると、通
常摩擦材全量の１〜６０重量％程度、好ましくは３〜３
５重量％程度とすればよい。Known reinforcing fibers can be used, for example, glass fiber, rock wool, aramid fiber, steel fiber, stainless steel fiber, copper fiber, brass fiber, ceramic fiber, rock wool, carbon fiber, wood pulp, etc. Among them, glass fiber, rock wool, aramid fiber and the like are preferable. One type of reinforcing fiber can be used alone, or two or more types can be used in combination. The compounding amount of the reinforcing fiber is not particularly limited and can be appropriately selected. However, considering the mechanical strength of the obtained friction material, it is usually about 1 to 60% by weight, preferably 3 to 3% by weight of the total amount of the friction material.
It may be about 5% by weight.
【０００９】チタン酸カリウム繊維としては公知のもの
を使用でき、例えば、アスペクト比が１０以上であり、
且つ一般式 Ｋ2Ｏ・ｎＴｉＯ2・ｍＨ2Ｏ 〔式中、ｎは２〜８の整数を示す。０≦ｍ≦０．５であ
る。〕で表される組成を有するものを挙げることができ
る。より具体的には、二チタン酸カリウム繊維、四チタ
ン酸カリウム繊維、六チタン酸カリウム繊維、八チタン
酸カリウム繊維等を挙げることができる。これらの中で
も、八チタン酸カリウム繊維が好ましい。チタン酸カリ
ウム繊維は１種を単独で使用でき又は２種以上を併用で
きる。チタン酸カリウム繊維の配合量は特に制限されず
適宜選択できるが、得られる摩擦材の機械的強度、摺動
性能、耐摩耗性等を考慮すると、通常摩擦材全量の１〜
２０重量％程度、好ましくは３〜１５重量％程度とすれ
ばよい。As the potassium titanate fiber, known fibers can be used, for example, having an aspect ratio of 10 or more,
And a general formula: K 2 O.nTiO 2 .mH 2 O [wherein, n represents an integer of 2 to 8. 0 ≦ m ≦ 0.5. ] Having the composition represented by the formula: More specifically, mention may be made of potassium dititanate fiber, potassium tetratitanate fiber, potassium hexatitanate fiber, potassium octitanate fiber and the like. Among these, potassium octitanate fiber is preferable. As the potassium titanate fiber, one type can be used alone, or two or more types can be used in combination. The mixing amount of the potassium titanate fiber is not particularly limited and can be appropriately selected, but in consideration of the mechanical strength, sliding performance, abrasion resistance, and the like of the obtained friction material, usually 1 to 1 of the total amount of the friction material.
It may be about 20% by weight, preferably about 3 to 15% by weight.
【００１０】上記強化用繊維及びチタン酸カリウム繊維
には、必要に応じて、マトリックス樹脂への分散性等を
向上させるために、ビニルシラン、アミノシラン、エポ
キシシラン、メタアクリロキシシラン、メルカプトキシ
シラン等のシラン系カップリング剤、イソプロピルトリ
イソステアロイルチタネート、ジ（ジオクチルパイロホ
スフェート）エチレンチタネート等のチタネート系カッ
フプリング剤等で表面処理を施してもよい。The reinforcing fiber and the potassium titanate fiber may include, if necessary, vinyl silane, amino silane, epoxy silane, methacryloxy silane, mercapto oxy silane and the like in order to improve dispersibility in a matrix resin. Surface treatment may be performed with a titanate-based coupling agent such as a silane-based coupling agent, isopropyl triisostearoyl titanate, or di (dioctyl pyrophosphate) ethylene titanate.
【００１１】本発明の摩擦材においては、通常平均アス
ペクト比１〜５、好ましくは１〜３の立方体状又は板状
のチタン酸カリウムとチタン酸ナトリウムとを併用する
ことを最大の特徴とする。尚、本発明においては、立方
体状とは平均アスペクト比が１〜２程度の粒子を意味
し、板状とは平均アスペクト比が２〜５程度の粒子を意
味する。The most important feature of the friction material of the present invention is that cubic or plate-like potassium titanate and sodium titanate having an average aspect ratio of 1 to 5, preferably 1 to 3 are used in combination. In the present invention, the cubic shape means particles having an average aspect ratio of about 1 to 2, and the plate shape means particles having an average aspect ratio of about 2 to 5.
【００１２】本発明で使用するチタン酸カリウム及びチ
タン酸ナトリウムは、通常平均短軸長が０．１〜２μｍ
程度、好ましくは０．５〜１μｍ程度、平均長軸長が
０．５〜４μｍ程度、好ましくは１〜３μｍ程度のもの
である。The potassium titanate and sodium titanate used in the present invention usually have an average short axis length of 0.1 to 2 μm.
, Preferably about 0.5 to 1 μm, and the average major axis length is about 0.5 to 4 μm, preferably about 1 to 3 μm.
【００１３】チタン酸カリウム及びチタン酸ナトリウム
はいずれも公知の方法に従って製造できるが、その場合
には、平均アスペクト比が本発明に規定の範囲外のもの
が含まれている。所望の平均アスペクト比のものを得る
ためには、例えば、次のようにすればよい。即ち、得ら
れたチタン酸カリウム又はチタン酸ナトリウムに粉砕処
理等を施した後、その粒子を走査型電子顕微鏡下に写真
撮影し、投影図とし、該投影図の画像に沿ってセンサー
でなぞる方法等で画像処理し、短軸長及び長軸長を求
め、所望のアスペクト比を有する粒子の含有量が該投影
図の全粒子数の８５％以上、好ましくは９０％以上とな
るサンプルが、平均アスペクト比が所望の範囲にある立
方体状又は板状のチタン酸カリウム又はチタン酸ナトリ
ウムということになる。Both potassium titanate and sodium titanate can be produced according to a known method. In such a case, those having an average aspect ratio outside the range specified in the present invention are included. To obtain a desired average aspect ratio, for example, the following may be performed. That is, after the obtained potassium titanate or sodium titanate is subjected to a pulverizing treatment or the like, the particles are photographed under a scanning electron microscope to form a projection view, and a sensor is traced along the image of the projection view. And the like. The sample in which the content of the particles having the desired aspect ratio is 85% or more, preferably 90% or more of the total number of particles in the projection view, is determined. Cubic or plate-like potassium titanate or sodium titanate having an aspect ratio in a desired range is obtained.
【００１４】平均アスペクト比１〜５の立方体状又は板
状のチタン酸カリウムとチタン酸ナトリウムの配合量は
特に制限されず、適宜選択できるが、通常本発明の摩擦
材全量の０．５〜１０重量％、好ましくは３〜７重量％
とすればよい。尚、チタン酸カリウムとチタン酸ナトリ
ウムとの混合割合も特に制限はないが、通常チタン酸カ
リウムを３０〜６０重量％、好ましくは３５〜４５重量
％とすればよい。The amount of cubic or plate-like potassium titanate and sodium titanate having an average aspect ratio of 1 to 5 is not particularly limited and can be appropriately selected, but is usually 0.5 to 10 of the total amount of the friction material of the present invention. % By weight, preferably 3 to 7% by weight
And it is sufficient. The mixing ratio of potassium titanate and sodium titanate is not particularly limited, but usually 30 to 60% by weight of potassium titanate, preferably 35 to 45% by weight.
【００１５】本発明の摩擦材には、必要に応じて、公知
の摩擦材用添加剤が適量含まれていてもよい。該添加剤
としては、例えば、加硫又は未加硫の天然・合成ゴム粉
末、カシュー樹脂粉粒体、レジンダスト、ゴムダスト等
の有機物粉末、天然黒鉛、人造黒鉛、二硫化モリブデ
ン、二硫化アンチモン、硫酸バリウム、炭酸カルシウム
等の無機質粉末、銅、アルミニウム、亜鉛、鉄等の金属
粉末、アルミナ、シリカ、酸化クロム、酸化銅、三酸化
アンチモン、酸化チタン、酸化鉄等の酸化物粉末等を挙
げることができる。これらの摩擦材用添加剤は１種を単
独で使用でき又は２種以上を併用できる。The friction material of the present invention may contain an appropriate amount of a known additive for a friction material, if necessary. As the additive, for example, vulcanized or unvulcanized natural / synthetic rubber powder, cashew resin powder, resin dust, organic powder such as rubber dust, natural graphite, artificial graphite, molybdenum disulfide, antimony disulfide, Inorganic powders such as barium sulfate and calcium carbonate; metal powders such as copper, aluminum, zinc and iron; and oxide powders such as alumina, silica, chromium oxide, copper oxide, antimony trioxide, titanium oxide and iron oxide. Can be. One of these additives for friction materials can be used alone, or two or more can be used in combination.
【００１６】本発明の摩擦材は、公知の方法に従って製
造できる。例えば、マトリックス樹脂中に所定量の強化
用繊維、チタン酸カリウム繊維及び立方体状又は板状の
チタン酸カリウムとチタン酸ナトリウムを分散させ、更
に必要に応じて摩擦材用添加剤、防錆剤、潤滑剤等を添
加し、均一に混練して原料組成物を調製し、次いで金型
成形等により、加熱加圧下に成形を行い、機械加工、研
磨加工等を施すことにより、本発明の摩擦材を得ること
ができる。The friction material of the present invention can be manufactured according to a known method. For example, a predetermined amount of reinforcing fibers in a matrix resin, potassium titanate fibers and cubic or plate-like potassium titanate and sodium titanate are dispersed, if necessary further additives for friction material, rust inhibitor, A lubricant or the like is added and uniformly kneaded to prepare a raw material composition, and then molded under heat and pressure by die molding or the like, and then subjected to machining, polishing, or the like, thereby obtaining the friction material of the present invention. Can be obtained.
【００１７】[0017]
【実施例】以下に実施例を挙げ、本発明を具体的に説明
する。Ｖ型ブレンダーにて下記に示す組成を均一に混合
した。得られた混合物を、成形機（面圧力３００ｋｇ／
ｃｍ2）にて常温で２０秒間予備成形した後、成形機
（面圧力３００ｋｇ／ｃｍ2、金型温度１５０℃）にて
７分間加熱加圧成形し、引き続き２５０℃で３時間加熱
し、放冷後所定寸法に研磨してブレーキパッド用摩擦材
を製造した。EXAMPLES The present invention will be specifically described below with reference to examples. The following composition was uniformly mixed in a V-type blender. The obtained mixture is fed to a molding machine (surface pressure 300 kg /
cm 2 ) at room temperature for 20 seconds, followed by 7 minutes of heat and pressure molding in a molding machine (surface pressure 300 kg / cm 2 , mold temperature 150 ° C.), followed by heating at 250 ° C. for 3 hours and release. After cooling, the resultant was polished to a predetermined size to produce a friction material for a brake pad.
【００１８】 〔摩擦材組成〕 重量部 フェノール樹脂 １７ アラミド繊維 １０ ロックウール ６ チタン酸カリウム繊維 １０ カシューダスト １０ シリカ ３ タルク ８ 硫酸バリウム ２３ チタン酸カリウム（平均アスペクト比：２） ７ チタン酸ナトリウム（平均アスペクト比：４） ８[Friction material composition] parts by weight phenolic resin 17 aramid fiber 10 rock wool 6 potassium titanate fiber 10 cashew dust 10 silica 3 talc 8 barium sulfate 23 potassium titanate (average aspect ratio: 2) 7 sodium titanate (average) Aspect ratio: 4) 8
【００１９】得られた摩擦材について、ブレーキダイナ
モメーター試験機を用いた耐摩耗性試験（ＪＡＳＯ−Ｃ
４２７−８３）及び耐フェード性試験（ＪＡＳＯ−Ｃ４
０６−８２）を実施したところ、良好な耐摩耗性及び摺
動特性が発現した。更に、耐摩耗試験後に剪断強度試験
（ＪＡＳＯ−Ｃ４４４−７８）を行ったところ、やはり
良好な結果が得られた。The obtained friction material was subjected to an abrasion resistance test (JASO-C) using a brake dynamometer tester.
427-83) and a fade resistance test (JASO-C4
06-82), good wear resistance and sliding properties were exhibited. Further, when a shear strength test (JASO-C444-78) was performed after the wear resistance test, good results were also obtained.
【００２０】[0020]
【発明の効果】本発明によれば、優れた摺動特性と耐摩
耗性とを兼備し、急激なブレーキング等による高温に晒
されても強度が実質的に低下しない摩擦材を得ることが
できる。従って、本発明の摩擦材は自動車のディスクブ
レーキ、ドラムブレーキ、クラッチフェーシング等は勿
論のこと、鉄道車両、航空機、産業機械類等の各種輸送
機器類のブレーキ材としても有用である。According to the present invention, it is possible to obtain a friction material which has both excellent sliding characteristics and abrasion resistance and which does not substantially decrease in strength even when exposed to a high temperature due to sudden braking or the like. it can. Therefore, the friction material of the present invention is useful not only for disc brakes, drum brakes, clutch facings, etc. of automobiles, but also as brake materials for various transportation equipment such as railway vehicles, aircraft, industrial machines and the like.
Claims (2)
維成分としてチタン酸カリウム繊維と強化用繊維とを含
む摩擦材において、平均アスペクト比が１〜５である立
方体状又は板状のチタン酸カリウムとチタン酸ナトリウ
ムとを配合したことを特徴とする摩擦材。1. A friction material comprising a thermosetting resin as a matrix and a potassium titanate fiber and a reinforcing fiber as a fiber component, comprising a cubic or plate-like potassium titanate having an average aspect ratio of 1 to 5; A friction material comprising sodium titanate.
チタン酸ナトリウムの含有量が摩擦材全量の０．５〜１
０重量％である請求項１記載の摩擦材。2. A cubic or plate-like potassium titanate and sodium titanate content of 0.5 to 1 of the total amount of the friction material.
The friction material according to claim 1, which is 0% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11071102A JP2000264691A (en) | 1999-03-16 | 1999-03-16 | Friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11071102A JP2000264691A (en) | 1999-03-16 | 1999-03-16 | Friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000264691A true JP2000264691A (en) | 2000-09-26 |
Family
ID=13450859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11071102A Pending JP2000264691A (en) | 1999-03-16 | 1999-03-16 | Friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000264691A (en) |
-
1999
- 1999-03-16 JP JP11071102A patent/JP2000264691A/en active Pending
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