JPH08109369A - Friction material - Google Patents
Friction materialInfo
- Publication number
- JPH08109369A JPH08109369A JP24623094A JP24623094A JPH08109369A JP H08109369 A JPH08109369 A JP H08109369A JP 24623094 A JP24623094 A JP 24623094A JP 24623094 A JP24623094 A JP 24623094A JP H08109369 A JPH08109369 A JP H08109369A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- graphite particles
- grains
- graphite
- diameter
- 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
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- Braking Arrangements (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は摩擦材に関し、更に詳細
には繊維成分、結合材、及び充填材が含有された非石綿
系の摩擦材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction material, and more particularly to a non-asbestos friction material containing a fiber component, a binder and a filler.
【０００２】[0002]
【従来の技術】自動車等の車両のブレーキに使用される
摩擦材には、従来から繊維基材として使用されてきた石
綿に代えて、ガラス繊維、アルミナ繊維、チタン酸カル
シウム等の無機繊維、スチール繊維、銅繊維等の金属繊
維、或いは芳香族ポリアミド繊維等の有機繊維が単独又
は組み合わせて使用されている。かかる非石綿系の摩擦
材は、耐摩耗性が低くなる欠点がある。このため、特開
平１−２７２６８４号公報や特開平５−２０２３５１号
公報においては、摩擦材に潤滑性を持たせて耐摩耗性を
向上させるべく、摩擦材中に黒鉛粒子を含有させること
が提案されている。2. Description of the Related Art As a friction material used for a brake of a vehicle such as an automobile, glass fiber, alumina fiber, inorganic fiber such as calcium titanate, steel or the like has been used in place of asbestos which has been conventionally used as a fiber base material. Fibers, metal fibers such as copper fibers, or organic fibers such as aromatic polyamide fibers are used alone or in combination. Such a non-asbestos-based friction material has a drawback that its wear resistance is low. Therefore, in Japanese Patent Laid-Open No. 1-272684 and Japanese Patent Laid-Open No. 5-202351, it is proposed to include graphite particles in the friction material in order to impart lubricity to the friction material and improve wear resistance. Has been done.
【０００３】[0003]
【発明が解決しようとする課題】この様に、黒鉛粒子が
含有された摩擦材は、初期の目的である摩擦材の耐摩耗
性を向上させることができる。しかしながら、摩擦材に
潤滑性を付与する黒鉛粒子は、その含有量を増加するに
伴い耐摩耗性を向上できるものの、ブレーキ操作時のブ
レーキの効き（以下、ブレーキ効力と称することがあ
る）が黒鉛粒子の含有量が増加するに伴い低下すること
が判明した。このため、ブレーキ効力等の観点から、摩
擦材中の黒鉛粒子の含有量を、摩擦材の耐摩耗性が充分
に向上し得る量とすることは困難であった。また、従来
の黒鉛粒子が含有された摩擦材を使用したブレーキによ
れば、ブレーキ操作時に異音が発生する現象、いわゆる
ナキ現象（以下、単にナキと称する）や、ブレーキ操作
時に車両が振動する現象、いわゆるジャダー現象（以
下、単にジャダーと称する）が発生し易いことも判明し
た。そこで、本発明の目的は、黒鉛粒子が含有された非
石綿系の摩擦材において、ブレーキ効力を維持しつつ充
分な耐摩耗性を有することができ、且つブレーキ操作時
のナキ及びジャダーの発生程度を改善することができる
摩擦材を提供することにある。As described above, the friction material containing the graphite particles can improve the wear resistance of the friction material, which is the initial purpose. However, although the graphite particles that impart lubricity to the friction material can improve the wear resistance as the content thereof increases, the effect of the brake at the time of brake operation (hereinafter, sometimes referred to as brake effect) is It was found that as the content of particles increased, it decreased. For this reason, it was difficult to set the content of the graphite particles in the friction material to an amount that can sufficiently improve the wear resistance of the friction material from the viewpoint of the braking effect and the like. Further, according to a brake using a conventional friction material containing graphite particles, a phenomenon in which abnormal noise occurs during brake operation, a so-called Naki phenomenon (hereinafter simply referred to as Naki), or a vehicle vibrates during brake operation It has also been found that a phenomenon, a so-called judder phenomenon (hereinafter, simply referred to as judder) is likely to occur. Therefore, an object of the present invention is, in a non-asbestos-based friction material containing graphite particles, it is possible to have sufficient abrasion resistance while maintaining the braking effect, and the degree of naki and judder during braking operation. It is to provide a friction material that can improve the above.
【０００４】[0004]
【課題を解決するための手段】本発明者等は、前記目的
を達成すべく検討した結果、平均粒径が異なる二種の黒
鉛粒子を含有した摩擦材によれば、従来の如く、粒径が
略同一の黒鉛粒子のみを含有した摩擦材に比較して、ブ
レーキ効力が略同一となる黒鉛粒子の含有量において、
耐摩耗性を著しく向上させることができ、且つブレーキ
操作時のナキ及びジャダーの発生程度を改善できること
を見出し、本発明に到達した。すなわち、本発明は、繊
維成分、結合材、及び充填材が含有された非石綿系の摩
擦材において、該摩擦材中に、粒径の異なる少なくとも
二種の黒鉛粒子が含有されていることを特徴とする摩擦
材である。かかる構成を有する本発明において、黒鉛粒
子の含有量を、摩擦材重量に対して１〜１５重量％とす
ることによって、耐摩耗性とブレーキ効力とのバランス
をとることができる。Means for Solving the Problems As a result of studies to achieve the above object, the present inventors have found that a friction material containing two types of graphite particles having different average particle diameters has a conventional particle diameter. In comparison with the friction material containing only substantially the same graphite particles, in the content of the graphite particles that the braking effect is substantially the same,
The present inventors have found that the wear resistance can be remarkably improved, and the degree of naki and judder generated during brake operation can be improved, and the present invention has been accomplished. That is, the present invention relates to a non-asbestos-based friction material containing a fiber component, a binder, and a filler, wherein the friction material contains at least two types of graphite particles having different particle sizes. It is a characteristic friction material. In the present invention having such a constitution, by setting the content of the graphite particles to 1 to 15% by weight based on the weight of the friction material, it is possible to balance the wear resistance and the braking effect.
【０００５】また、含有する黒鉛粒子を、平均粒径１．
５〜２．５ｍｍの黒鉛粒子と、平均粒径０．３〜１．４
ｍｍの黒鉛粒子との二種とすると、３０ｋｍ／Ｈｒ以下
の低速走行中の車両において、ブレーキ操作した際に、
ナキ及びジャダーの発生を減少させることができる。更
に、含有する黒鉛粒子を、平均粒径１．５〜２．５ｍｍ
の黒鉛粒子と、平均粒径０．３〜１．４ｍｍの黒鉛粒子
と、平均粒径１００μｍ以下の黒鉛粒子との三種とする
と、１２０ｋｍ／Ｈｒ以下の速度領域において、ブレー
キ操作時のナキ及びジャダーの発生を防止できる。Further, the graphite particles contained therein have an average particle size of 1.
Graphite particles of 5 to 2.5 mm and average particle size of 0.3 to 1.4
When two kinds of graphite particles of mm are used, when a brake is operated in a vehicle running at a low speed of 30 km / Hr or less,
It is possible to reduce the occurrence of naki and judder. Furthermore, the included graphite particles have an average particle size of 1.5 to 2.5 mm.
Of the graphite particles, the average particle diameter of 0.3 to 1.4 mm, and the average particle diameter of 100 μm or less, naki and judder during braking operation in a speed range of 120 km / Hr or less. Can be prevented.
【０００６】[0006]
【作用】粒径が略同一の黒鉛粒子のみを含有した従来の
摩擦材は、摩擦材中に含有される黒鉛粒子量が増加する
に伴いブレーキ効力と摩耗量とが低下する。この点、本
発明によれば、摩擦材中に含有される黒鉛粒子量の増加
に伴うブレーキ効力の低下程度は従来の摩擦材と略同等
であるが、摩擦材の摩耗量を従来の摩擦材よりも著しく
低下することができる。このため、従来の摩擦材に含有
した黒鉛粒子量と同等量又は少量の黒鉛粒子を、摩擦材
中に含有させることによって、ブレーキ効力を保持しつ
つ摩擦材に充分な耐摩耗性を付与できるのである。更
に、ブレーキ操作時において、ナキ及びジャダーの発生
程度を改善することもできる。In the conventional friction material containing only graphite particles having substantially the same particle diameter, the braking effect and the wear amount decrease as the amount of graphite particles contained in the friction material increases. In this respect, according to the present invention, although the degree of decrease in braking effectiveness with the increase in the amount of graphite particles contained in the friction material is substantially the same as that of the conventional friction material, the wear amount of the friction material is Can be significantly reduced. For this reason, by including graphite particles in an amount equal to or smaller than the amount of graphite particles contained in a conventional friction material, it is possible to impart sufficient abrasion resistance to the friction material while maintaining the braking effect. is there. Further, it is possible to improve the degree of occurrence of naki and judder during brake operation.
【０００７】[0007]
【発明の概要】本発明において対象する摩擦材は、非石
綿系の摩擦材であって、繊維基材として、ガラス繊維、
アルミナ繊維、チタン酸カルシウム等の無機繊維、スチ
ール繊維、銅繊維等の金属繊維、或いは芳香族ポリアミ
ド繊維等の有機繊維が単独又は組み合わせて使用され、
結合材としてフェノールレジンが使用される。更に、充
填材として、金属粉、炭酸カルシウム、或いはアルミナ
等の一種又は二種以上が使用される。これら繊維基材、
結合材、及び充填材を混合し、所定形状に予備成形した
後、加圧・加熱することによって摩擦材を成形すること
ができる。SUMMARY OF THE INVENTION The friction material to be used in the present invention is a non-asbestos friction material, and the fiber base material is glass fiber,
Alumina fibers, inorganic fibers such as calcium titanate, steel fibers, metal fibers such as copper fibers, or organic fibers such as aromatic polyamide fibers are used alone or in combination,
Phenolic resin is used as a binder. Further, as the filler, one kind or two or more kinds of metal powder, calcium carbonate, alumina or the like is used. These fiber substrates,
The friction material can be formed by mixing the binder and the filler, preforming the mixture into a predetermined shape, and then applying pressure and heat.
【０００８】かかる本発明の摩擦材に含有することので
きる黒鉛粒子は、従来から使用されている黒鉛粒子、例
えば天然鱗片状黒鉛や人造黒鉛（電極破砕粒）を使用で
き、その含有量を摩擦材重量に対して１〜１５重量％、
特に５〜１５重量％とすることによって、摩擦材の耐摩
耗性とブレーキ効力とのバランスを図ることができ好ま
しい。ここで、黒鉛粒子の含有量が１重量％未満の摩擦
材では、ブレーキ効力が良好となるものの、摩擦材の耐
摩耗性が低下する傾向にある。一方、黒鉛粒子の含有量
が１５重量％を越える摩擦材では、摩擦材の耐摩耗性が
向上されるものの、ブレーキ効力が低下する傾向にあ
る。As the graphite particles which can be contained in the friction material of the present invention, conventionally used graphite particles such as natural flake graphite or artificial graphite (crushed particles of electrodes) can be used, and the content thereof is reduced by friction. 1 to 15% by weight of material weight,
In particular, the amount of 5 to 15% by weight is preferable because the wear resistance of the friction material and the braking effect can be balanced. Here, with a friction material having a graphite particle content of less than 1% by weight, the braking effect is good, but the wear resistance of the friction material tends to decrease. On the other hand, with a friction material having a graphite particle content of more than 15% by weight, the abrasion resistance of the friction material is improved, but the braking effectiveness tends to be reduced.
【０００９】本発明においては、かかる黒鉛粒子が含有
された摩擦材に、粒径の異なる少なくとも二種の黒鉛粒
子が含有されていることが肝要である。ここで、図１
に、全含有黒鉛粒子に対し、６０重量％の平均粒径０．
３〜１．４ｍｍの黒鉛粒子（小径黒鉛粒子）と４０重量
％の平均粒径１．５〜２．５ｍｍの黒鉛粒子（大径黒鉛
粒子）とが含有されている摩擦材Ａと、平均粒径０．３
〜１．４ｍｍの黒鉛粒子のみが含有されている従来の摩
擦材Ｂとのブレーキ効力及び摩耗量とについて検討した
結果を示す。図１に示すグラフは、摩擦材重量に対する
黒鉛粒子含有量を横軸に示すと共に、縦軸に摩擦材の摩
耗量とブレーキ効力としての摩擦材の摩擦係数（μ）と
を示した。尚、摩擦材の摩耗量はブレーキ装置ダイナモ
メータ試験機（JASO C106)によって測定し、摩擦係数
（μ）はJIS-D4411 ブレーキライニング試験法に準拠し
て測定した。In the present invention, it is important that the friction material containing such graphite particles contains at least two kinds of graphite particles having different particle diameters. Here, FIG.
In addition, the average particle diameter of 60% by weight, based on the total content of graphite particles, is 0.
A friction material A containing graphite particles of 3 to 1.4 mm (small diameter graphite particles) and 40% by weight of graphite particles of 1.5 to 2.5 mm average particle diameter (large diameter graphite particles), and average particles. Diameter 0.3
The results of examining the braking effectiveness and the wear amount with the conventional friction material B containing only graphite particles of up to 1.4 mm are shown. In the graph shown in FIG. 1, the horizontal axis represents the graphite particle content relative to the weight of the friction material, and the vertical axis represents the wear amount of the friction material and the friction coefficient (μ) of the friction material as the braking effect. The amount of wear of the friction material was measured by a brake device dynamometer tester (JASO C106), and the friction coefficient (μ) was measured in accordance with JIS-D4411 Brake lining test method.
【００１０】かかる摩擦材Ａと摩擦材Ｂとにおいて、摩
擦材の摩擦係数（μ）については、両者には差がなかっ
たが、図１から明らかなように、摩擦材の摩耗量につい
ては、摩擦材Ａは摩擦材Ｂに比較して、摩擦材の摩耗量
を著しく減少させることができる。このため、摩擦材Ａ
の黒鉛粒子含有量を、摩擦材Ｂの黒鉛粒子含有量よりも
減少させることによって、摩擦材Ａの耐摩耗性及び摩擦
係数（μ）を摩擦材Ｂよりも向上させることができる。There is no difference in the friction coefficient (μ) between the friction material A and the friction material B, but as is clear from FIG. 1, the wear amount of the friction material is The friction material A can significantly reduce the wear amount of the friction material as compared with the friction material B. Therefore, the friction material A
By reducing the graphite particle content of the friction material B from the graphite particle content of the friction material B, the wear resistance and the friction coefficient (μ) of the friction material A can be improved as compared with the friction material B.
【００１１】図１では、平均粒径０．３〜１．４ｍｍの
大径黒鉛粒子と平均粒径１．５〜２．５ｍｍの小径黒鉛
粒子との含有比率を一定に保持し、摩擦材の摩耗量と摩
擦係数（μ）とを測定したが、大径黒鉛粒子の含有比率
を変更して同様な測定を行った結果を図２に示す。但
し、図２においては、黒鉛粒子の摩擦材重量に対する含
有量を、１０重量％とした。ここで、従来の経験から摩
擦材としては、耐久性及び制動力等の観点から、摩耗量
が１．１ｍｍ以下で且つ摩擦係数（μ）が０．２５以上
の摩擦材が要求される。このため、かかる摩擦材が得ら
れる大径黒鉛粒子の含有比率の範囲を図２から読むと、
大径黒鉛粒子の含有比率が１０〜７０重量％の範囲であ
る。特に、摩耗量が１．０ｍｍ以下で且つ摩擦係数
（μ）が０．３５以上である、低摩耗で且つ高摩擦係数
（μ）の摩擦材が要求される場合には、大径黒鉛粒子の
含有比率を２０〜３５重量％とすることが好ましい。In FIG. 1, the content ratio of large-diameter graphite particles having an average particle diameter of 0.3 to 1.4 mm and small-diameter graphite particles having an average particle diameter of 1.5 to 2.5 mm is kept constant, and the friction material The amount of wear and the coefficient of friction (μ) were measured, and the results of the same measurement performed by changing the content ratio of the large-diameter graphite particles are shown in FIG. However, in FIG. 2, the content of the graphite particles with respect to the weight of the friction material was set to 10% by weight. Here, from the conventional experience, as the friction material, from the viewpoint of durability and braking force, a friction material having a wear amount of 1.1 mm or less and a friction coefficient (μ) of 0.25 or more is required. Therefore, when the range of the content ratio of the large-diameter graphite particles from which such a friction material is obtained is read from FIG.
The content ratio of the large-diameter graphite particles is in the range of 10 to 70% by weight. In particular, when a friction material having a wear amount of 1.0 mm or less and a friction coefficient (μ) of 0.35 or more and low wear and a high friction coefficient (μ) is required, The content ratio is preferably 20 to 35% by weight.
【００１２】図１に示す本発明に係る摩擦材Ａと従来の
摩擦材である摩擦材Ｂとを実車に搭載して走行テストを
行ったところ、摩擦材Ａは、従来の摩擦材である摩擦材
Ｂに比較して、３０ｋｍ／Ｈr 以下の低速度領域におい
て、ブレーキ操作時のナキ及びジャダーも減少させるこ
とができる。唯、摩擦材Ａを使用しても、３０ｋｍ／Ｈ
r 以上の中速領域以上ではブレーキ操作時のナキ及びジ
ャダーを防止することができなかった。かかる中速領域
以上でのブレーキ操作時のナキ及びジャダーは、平均粒
径１．５〜２．５ｍｍの黒鉛粒子と、平均粒径０．３〜
１．４ｍｍの黒鉛粒子と、平均粒径１００μｍ以下の黒
鉛粒子との三種の黒鉛粒子が含有された摩擦材を使用す
ることによって防止することができる。When the friction material A according to the present invention shown in FIG. 1 and the friction material B which is a conventional friction material were mounted on an actual vehicle and a running test was conducted, the friction material A was a friction material which was a conventional friction material. Compared with the material B, in the low speed region of 30 km / Hr or less, the naki and judder during brake operation can be reduced. Even if the friction material A is used, 30 km / H
It was not possible to prevent puddle and judder during brake operation in the medium speed range above r. Naki and judder during brake operation in the medium speed range or higher include graphite particles having an average particle size of 1.5 to 2.5 mm and an average particle size of 0.3 to
This can be prevented by using a friction material containing three types of graphite particles of 1.4 mm graphite particles and graphite particles having an average particle diameter of 100 μm or less.
【００１３】この様に、平均粒径が異なる三種の黒鉛粒
子が含有された摩擦材でも、その耐摩耗性及び摩擦係数
については、粒径が略同一の黒鉛粒子のみが含有された
従来の摩擦材よりも向上されている。また、平均粒径が
異なる三種の黒鉛粒子が含有された摩擦材において、耐
摩耗性とブレーキ効力とのバランスを図るためには、全
含有黒鉛粒子に対し、平均粒径１．５〜２．５ｍｍの黒
鉛粒子が１０〜７０重量％（特に、好ましくは２０〜３
５重量％）、平均粒径０．３〜１．４ｍｍの黒鉛粒子が
２０〜８０重量％（特に、好ましくは３０〜６０重量
％）、平均粒径１００μｍ以下の黒鉛粒子が１０重量％
以上（特に、好ましくは２０〜３５重量％）とすること
が好ましい。As described above, even in the friction material containing three kinds of graphite particles having different average particle diameters, the wear resistance and friction coefficient of the conventional friction material including only the graphite particles having substantially the same particle diameter are included. It is better than wood. Further, in a friction material containing three types of graphite particles having different average particle diameters, in order to balance wear resistance and braking effectiveness, the average particle diameter is 1.5 to 2. 5 mm graphite particles are 10 to 70% by weight (particularly preferably 20 to 3).
5% by weight), graphite particles having an average particle diameter of 0.3 to 1.4 mm are 20 to 80% by weight (particularly preferably 30 to 60% by weight), and graphite particles having an average particle diameter of 100 μm or less are 10% by weight.
It is preferable that the amount is above (particularly preferably 20 to 35% by weight).
【００１４】[0014]
【実施例】本発明について実施例によって更に詳細に説
明する。 実施例１ 下記表１に示す組成の材料を、混合機で均一に混合した
後、所定形状に予備成形し、次いで加圧・加熱すること
によって摩擦材を成形した。尚、表１において、黒鉛粒
子の平均粒径は、篩分によって測定した。EXAMPLES The present invention will be described in more detail by way of examples. Example 1 Materials having the compositions shown in Table 1 below were uniformly mixed by a mixer, preformed into a predetermined shape, and then pressed and heated to form a friction material. In Table 1, the average particle size of the graphite particles was measured by sieving.
【表１】 次いで、得られた摩擦材の摩耗量をブレーキ装置ダイナ
モメータ試験機（JASOC106) によって測定し、摩擦係数
（μ）をJIS-D4411 ブレーキライニング試験法に準拠し
て測定したところ、摩擦材の摩耗量は０．９０ｍｍであ
り、摩擦係数（μ）は０．４５であった。[Table 1] Then, the wear amount of the obtained friction material was measured by a brake device dynamometer tester (JASOC106), and the friction coefficient (μ) was measured according to JIS-D4411 Brake lining test method. Was 0.90 mm and the coefficient of friction (μ) was 0.45.
【００１５】比較例 実施例１において、表２に示す様に、黒鉛粒子として、
平均粒径０．３〜１．４ｍｍの黒鉛粒子のみを使用した
他は、実施例１と同様にして摩擦材を成形し、摩擦材の
摩耗量及び摩擦係数（μ）を測定した。その結果、摩擦
材の摩耗量は１．２０ｍｍであり、摩擦係数（μ）は
０．５２であった。Comparative Example In Example 1, as shown in Table 2, as graphite particles,
A friction material was molded in the same manner as in Example 1 except that only graphite particles having an average particle diameter of 0.3 to 1.4 mm were used, and the wear amount and the friction coefficient (μ) of the friction material were measured. As a result, the wear amount of the friction material was 1.20 mm and the friction coefficient (μ) was 0.52.
【表２】 [Table 2]
【００１６】実施例２ 下記表３に示す組成の材料を、混合機で均一に混合した
後、所定形状に予備成形し、次いで加圧・加熱すること
によって摩擦材を成形した。Example 2 Materials having the compositions shown in Table 3 below were uniformly mixed in a mixer, preformed into a predetermined shape, and then pressed and heated to form a friction material.
【表３】 次いで、得られた摩擦材の摩耗量をブレーキ装置ダイナ
モメータ試験機（JASOC106) によって測定し、摩擦係数
（μ）をJIS-D4411 ブレーキライニング試験法に準拠し
て測定したところ、摩擦材の摩耗量は０．９５ｍｍであ
り、摩擦係数（μ）は０．４６であった。[Table 3] Then, the wear amount of the obtained friction material was measured by a brake device dynamometer tester (JASOC106), and the friction coefficient (μ) was measured according to JIS-D4411 Brake lining test method. Was 0.95 mm and the coefficient of friction (μ) was 0.46.
【００１７】実施例３ 実施例１、比較例、及び実施例２で得られた摩擦材を、
実車に搭載して種々の速度での走行テストを行い、ブレ
ーキ操作時におけるナキ及びジャダーについて調査し
た。その結果を表４に示す。Example 3 The friction materials obtained in Example 1, Comparative Example and Example 2 were
It was mounted on an actual vehicle and tested at various speeds to investigate naki and judder during brake operation. The results are shown in Table 4.
【表４】 表４から明らかなように、比較例の摩擦材では、低速領
域から高速領域の全速度領域に亘ってナキ及びジャダー
が発生し易いが、実施例１の摩擦材では、低速領域での
ナキ及びジャダーの発生程度を改善することができる。
更に、実施例３の摩擦材では、低速領域から高速領域の
全速度領域に亘ってナキ及びジャダーの発生程度を改善
することができる。[Table 4] As is clear from Table 4, in the friction material of the comparative example, naki and judder are likely to occur over the entire speed range from the low speed region to the high speed region. The degree of judder generation can be improved.
Furthermore, with the friction material of Example 3, the degree of naki and judder can be improved over the entire speed range from the low speed range to the high speed range.
【００１８】[0018]
【発明の効果】本発明によれば、ブレーキ効力を保持し
つつ摩擦材に充分な耐摩耗性を付与できるため、安全性
を充分に確保しつつ摩耗性の耐久性を向上できる。更
に、ブレーキ操作時のナキやジャダーの発生程度を改善
できるため、快適な運転を行うことができる。According to the present invention, since sufficient abrasion resistance can be imparted to the friction material while maintaining the braking effect, it is possible to improve abrasion resistance durability while ensuring sufficient safety. Furthermore, since the degree of naki and judder generated during brake operation can be improved, comfortable driving can be performed.
【図１】本発明に係る摩擦材と従来の摩擦材との差を説
明するためのグラフである。FIG. 1 is a graph for explaining a difference between a friction material according to the present invention and a conventional friction material.
【図２】本発明に係る摩擦材中に含有した大径黒鉛粒子
の含有比率と、摩擦材の特性との関係を説明するための
グラフである。FIG. 2 is a graph for explaining the relationship between the content ratio of large-diameter graphite particles contained in the friction material according to the present invention and the characteristics of the friction material.
Ａ 本発明に係る摩擦材 Ｂ 従来の摩擦材 A Friction material according to the present invention B Conventional friction material
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成７年６月５日[Submission date] June 5, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００２】[0002]
【従来の技術】自動車等の車両のブレーキに使用される
摩擦材には、従来から繊維基材として使用されてきた石
綿に代えて、ガラス繊維、アルミナ繊維、無機繊維、ス
チール繊維、銅繊維等の金属繊維、或いは芳香族ポリア
ミド繊維等の有機繊維が単独又は組み合わせて使用され
ている。かかる非石綿系の摩擦材は、耐摩耗性が低くな
る欠点がある。このため、特開平１−２７２６８４号公
報や特開平５−２０２３５１号公報においては、摩擦材
に潤滑性を持たせて耐摩耗性を向上させるべく、摩擦材
中に黒鉛粒子を含有させることが提案されている。2. Description of the Related Art As a friction material used for a brake of a vehicle such as an automobile, glass fiber, alumina fiber, inorganic fiber , steel fiber, copper fiber, etc. are used in place of asbestos which has been used as a fiber base material. These metal fibers or organic fibers such as aromatic polyamide fibers are used alone or in combination. Such a non-asbestos-based friction material has a drawback that its wear resistance is low. Therefore, in Japanese Patent Laid-Open No. 1-272684 and Japanese Patent Laid-Open No. 5-202351, it is proposed to include graphite particles in the friction material in order to impart lubricity to the friction material and improve wear resistance. Has been done.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】[0007]
【発明の概要】本発明において対象する摩擦材は、非石
綿系の摩擦材であって、繊維基材として、ガラス繊維、
アルミナ繊維、無機繊維、スチール繊維、銅繊維等の金
属繊維、或いは芳香族ポリアミド繊維等の有機繊維が単
独又は組み合わせて使用され、結合材としてフェノール
レジンが使用される。更に、充填材として、金属粉、炭
酸カルシウム、或いはアルミナ等の一種又は二種以上が
使用される。これら繊維基材、結合材、及び充填材を混
合し、所定形状に予備成形した後、加圧・加熱すること
によって摩擦材を成形することができる。SUMMARY OF THE INVENTION The friction material to be used in the present invention is a non-asbestos friction material, and the fiber base material is glass fiber,
Alumina fibers, inorganic fibers , steel fibers, metal fibers such as copper fibers, or organic fibers such as aromatic polyamide fibers are used alone or in combination, and phenol resin is used as a binder. Further, as the filler, one kind or two or more kinds of metal powder, calcium carbonate, alumina or the like is used. The fibrous base material, the binder, and the filler are mixed, preformed into a predetermined shape, and then pressurized and heated to form the friction material.
【手続補正書】[Procedure amendment]
【提出日】平成７年７月２０日[Submission date] July 20, 1995
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００２[Name of item to be corrected] 0002
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００２】[0002]
【従来の技術】自動車等の車両のブレーキに使用される
摩擦材には、従来から繊維基材として使用されてきた石
綿に代えて、ガラス繊維、アルミナ繊維等の無機繊維、
スチール繊維、銅繊維等の金属繊維、或いは芳香族ポリ
アミド繊維等の有機繊維が単独又は組み合わせて使用さ
れている。かかる非石綿系の摩擦材は、耐摩耗性が低く
なる欠点がある。このため、特開平１−２７２６８４号
公報や特開平５−２０２３５１号公報においては、摩擦
材に潤滑性を持たせて耐摩耗性を向上させるべく、摩擦
材中に黒鉛粒子を含有させることが提案されている。2. Description of the Related Art As a friction material used for brakes of vehicles such as automobiles, in place of asbestos which has been used as a fiber base material in the past , inorganic fibers such as glass fiber and alumina fiber ,
Metal fibers such as steel fibers and copper fibers, or organic fibers such as aromatic polyamide fibers are used alone or in combination. Such a non-asbestos-based friction material has a drawback that its wear resistance is low. Therefore, in Japanese Patent Laid-Open No. 1-272684 and Japanese Patent Laid-Open No. 5-202351, it is proposed to include graphite particles in the friction material in order to impart lubricity to the friction material and improve wear resistance. Has been done.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【０００７】[0007]
【発明の概要】本発明において対象する摩擦材は、非石
綿系の摩擦材であって、繊維基材として、ガラス繊維、
アルミナ繊維等の無機繊維、スチール繊維、銅繊維等の
金属繊維、或いは芳香族ポリアミド繊維等の有機繊維が
単独又は組み合わせて使用され、結合材としてフェノー
ルレジンが使用される。更に、充填材として、金属粉、
炭酸カルシウム、或いはアルミナ等の一種又は二種以上
が使用される。これら繊維基材、結合材、及び充填材を
混合し、所定形状に予備成形した後、加圧・加熱するこ
とによって摩擦材を成形することができる。SUMMARY OF THE INVENTION The friction material to be used in the present invention is a non-asbestos friction material, and the fiber base material is glass fiber,
Inorganic fibers such as alumina fibers, metal fibers such as steel fibers and copper fibers, or organic fibers such as aromatic polyamide fibers are used alone or in combination, and phenol resin is used as a binder. Furthermore, as a filler, metal powder,
One or more of calcium carbonate and alumina are used. The fibrous base material, the binder, and the filler are mixed, preformed into a predetermined shape, and then pressurized and heated to form the friction material.
Claims (4)
れた非石綿系の摩擦材において、 該摩擦材中に、粒径の異なる少なくとも二種の黒鉛粒子
が含有されていることを特徴とする摩擦材。1. A non-asbestos friction material containing a fiber component, a binder, and a filler, wherein the friction material contains at least two kinds of graphite particles having different particle sizes. And friction material.
て１〜１５重量％である請求項１記載の摩擦材。2. The friction material according to claim 1, wherein the content of the graphite particles is 1 to 15% by weight based on the weight of the friction material.
〜２．５ｍｍの黒鉛粒子と、平均粒径０．３〜１．４ｍ
ｍの黒鉛粒子との二種である請求項１又は請求項２記載
の摩擦材。3. The graphite particles contained have an average particle size of 1.5.
~ 2.5 mm graphite particles and average particle size 0.3-1.4 m
The friction material according to claim 1 or 2, which is two kinds of graphite particles of m.
〜２．５ｍｍの黒鉛粒子と、平均粒径０．３〜１．４ｍ
ｍの黒鉛粒子と、平均粒径１００μｍ以下の黒鉛粒子と
の三種である請求項１又は請求項２記載の摩擦材。4. The graphite particles contained have an average particle size of 1.5.
~ 2.5 mm graphite particles and average particle size 0.3-1.4 m
The friction material according to claim 1 or 2, which is three kinds of graphite particles of m and graphite particles having an average particle size of 100 µm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24623094A JPH08109369A (en) | 1994-10-12 | 1994-10-12 | Friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24623094A JPH08109369A (en) | 1994-10-12 | 1994-10-12 | Friction material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08109369A true JPH08109369A (en) | 1996-04-30 |
Family
ID=17145453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24623094A Pending JPH08109369A (en) | 1994-10-12 | 1994-10-12 | Friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08109369A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016079252A (en) * | 2014-10-14 | 2016-05-16 | 日本ブレーキ工業株式会社 | Friction material composition, friction material, and friction member |
| CN108317197A (en) * | 2017-10-20 | 2018-07-24 | 山西奥力安新材料科技有限公司 | A kind of ecological, environmental protective organic composite material brake pad and its preparation process |
| JP2018135446A (en) * | 2017-02-22 | 2018-08-30 | 日立化成株式会社 | Friction material composition |
-
1994
- 1994-10-12 JP JP24623094A patent/JPH08109369A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016079252A (en) * | 2014-10-14 | 2016-05-16 | 日本ブレーキ工業株式会社 | Friction material composition, friction material, and friction member |
| JP2018135446A (en) * | 2017-02-22 | 2018-08-30 | 日立化成株式会社 | Friction material composition |
| CN108317197A (en) * | 2017-10-20 | 2018-07-24 | 山西奥力安新材料科技有限公司 | A kind of ecological, environmental protective organic composite material brake pad and its preparation process |
| CN108317197B (en) * | 2017-10-20 | 2019-11-15 | 山西奥力安新材料科技有限公司 | A kind of ecological, environmental protective organic composite material brake pad and its preparation process |
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