JPH0619197B2 - Friction material composition - Google Patents
Friction material compositionInfo
- Publication number
- JPH0619197B2 JPH0619197B2 JP16848887A JP16848887A JPH0619197B2 JP H0619197 B2 JPH0619197 B2 JP H0619197B2 JP 16848887 A JP16848887 A JP 16848887A JP 16848887 A JP16848887 A JP 16848887A JP H0619197 B2 JPH0619197 B2 JP H0619197B2
- Authority
- JP
- Japan
- Prior art keywords
- friction
- volume
- friction material
- material composition
- organic filler
- 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.)
- Expired - Lifetime
Links
- 239000002783 friction material Substances 0.000 title claims description 36
- 239000000203 mixture Substances 0.000 title claims description 15
- 239000012766 organic filler Substances 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 8
- 239000003607 modifier Substances 0.000 claims description 8
- 239000007799 cork Substances 0.000 claims description 7
- 239000011256 inorganic filler Substances 0.000 claims description 6
- 239000000395 magnesium oxide Substances 0.000 claims description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 6
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 6
- 239000012783 reinforcing fiber Substances 0.000 claims description 6
- 239000001913 cellulose Substances 0.000 claims description 5
- 229920002678 cellulose Polymers 0.000 claims description 5
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 229920001187 thermosetting polymer Polymers 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 description 10
- 229910052895 riebeckite Inorganic materials 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 229920006231 aramid fiber Polymers 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000004088 simulation Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000003365 glass fiber Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005011 phenolic resin Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、電磁クラッチ等のトルク伝達用に使用される
ブレーキライニング、クラッチフェーシング等の摩擦材
組成物に関するものである。TECHNICAL FIELD The present invention relates to a friction material composition such as a brake lining and a clutch facing used for torque transmission of an electromagnetic clutch and the like.
［従来の技術］ 従来、電磁クラッチなどのトルク伝達部材に使用される
ブレーキライニング、クラッチフェーシング等の摩擦材
料としては、アスベスト繊維と無機、有機の各種充填材
および有機摩擦調整剤等にフェノール樹脂のような熱硬
化性樹脂結合剤を加えて、加熱プレス成形し、硬化した
ものが用いられている。しかしながら、近年、アスベス
ト粉塵の公害性に関する議論が高まるにつれて、自動車
用摩擦材のみならず、事務機器や産業機械の駆動遥とし
て使用される電磁クラッチ用の摩擦材についても、アス
ベスト繊維を使用しない摩擦材料の必要性が高まつてき
ている。[Prior Art] Conventionally, as friction materials such as brake linings and clutch facings used for torque transmission members such as electromagnetic clutches, asbestos fibers and various inorganic and organic fillers, organic friction modifiers, and phenol resin are used. Such a thermosetting resin binder is added, and hot press molding is performed and then cured. However, as the debate about the pollution of asbestos dust has increased in recent years, not only friction materials for automobiles, but also friction materials for electromagnetic clutches used as driving equipment for office equipment and industrial machines, friction that does not use asbestos fibers There is a growing need for materials.
アスベスト繊維に代わるものとしては、金属繊維、ガラ
ス繊維、セラミック繊維、合成繊維などがあり、スチー
ル繊維を使用したものはセミメタリックパッドと呼ば
れ、一部の自動車用摩擦材として実用化されている。As an alternative to asbestos fibers, there are metal fibers, glass fibers, ceramic fibers, synthetic fibers, etc., and those using steel fibers are called semi-metallic pads, which have been put into practical use as some friction materials for automobiles. .
しかしながら、電磁クラッチ用摩擦材は、非磁性体であ
ることが必要なため、スチール繊維を使用したセミメタ
リックパッドは使用されていない。また、ガラス繊維を
使用した摩擦材についても、一部クラッチ板として実用
化されているが、原料が高価で、しかも取扱い時の作業
性が悪いという欠点を有しているため、将来多量に使わ
れる可能性は少ない。However, since the friction material for the electromagnetic clutch needs to be a non-magnetic material, the semi-metallic pad using steel fiber is not used. Also, some friction materials using glass fibers have been put to practical use as clutch plates, but since they have the drawbacks of expensive raw materials and poor workability during handling, they will be used in large quantities in the future. There is little possibility of being caught.
最近、注目を集めているアラミド繊維も、自動車用摩擦
材としての検討が進められており、一部実用化されてい
るが、ガラス繊維と同様に高価なため、将来多量に使わ
れる可能性は少ない。Recently, aramid fiber, which has been attracting attention, is being studied as a friction material for automobiles and has been partially put into practical use. However, it is likely to be used in large quantities in the future because it is expensive like glass fiber. Few.
以上述べたように、安価な原料を使用したノンアスベス
ト摩擦材の開発が将来より望まれている。本発明者等
は、高価なアラミド繊維の使用を極力減らし、安価な原
料であるセルロースパルプを用い、さらにコルク粉、カ
シュダスト、炭酸カルシウム粉末を添加することより、
従来のアラミド繊維ベースのノンアスベスト摩擦材と同
等もしくはそれ以上の性能を有する摩擦材を既に開発し
ている。As described above, development of non-asbestos friction materials using inexpensive raw materials is desired in the future. The present inventors reduce the use of expensive aramid fiber as much as possible, use cellulose pulp which is an inexpensive raw material, by further adding cork powder, cash dust, calcium carbonate powder,
We have already developed a friction material that has performance equivalent to or better than the conventional non-asbestos friction material based on aramid fiber.
［発明が解決しようとする問題点］ しかしながら、電磁クラッチに使用される摩擦材は、自
動車用摩擦材と異なり、未使用の新しいときから優れた
トルク伝達能力を発揮する必要があり、また摩擦係数に
換算すると、μ≧０．４という条件を満足する必要があ
る。本発明者等が既に開発した上述のノンアスベスト摩
擦材は、電磁クラッチとして実際に使用される条件でシ
ミュレートして評価したところ、上記の条件を満足でき
るものではなかった。さらに、このノンアスベスト摩擦
材は、混合後の完粉（成形前の状態の混合粉）が綿状に
なるため、電磁クラッチのようなリング状の摩擦板を製
造する際、均質な製品を製造しようとする工程が複雑代
し、製造コストが高くなるという問題点があった。[Problems to be Solved by the Invention] However, the friction material used for the electromagnetic clutch, unlike the friction material for automobiles, is required to exhibit excellent torque transmission capability from a new time, and the friction coefficient When converted into, it is necessary to satisfy the condition of μ ≧ 0.4. The above-mentioned non-asbestos friction material developed by the present inventors was not satisfied with the above conditions when simulated and evaluated under the conditions actually used as an electromagnetic clutch. In addition, this non-asbestos friction material produces a cotton-like finished powder after mixing (mixed powder in the state before molding), so when manufacturing ring-shaped friction plates such as electromagnetic clutches, a homogeneous product is produced. There is a problem that the process to be performed is complicated and the manufacturing cost is high.
それゆえに、本発明の目的は従来のアラミド繊維ベース
のノンスアスベスト摩擦材と同等の摩擦特性を有し、し
かも初期状態における摩擦係数がその後安定状態におけ
る摩擦係数以上である摩擦材組成物を提供することにあ
る。Therefore, an object of the present invention is to provide a friction material composition having friction characteristics equivalent to those of a conventional aramid fiber-based non-asbestos friction material, and having a friction coefficient in an initial state equal to or higher than a friction coefficient in a stable state thereafter. Especially.
［問題点を解決するための手段および作用］ 本発明の摩擦材組成物は、補強用繊維材料、有機充填
材、無機充填材および摩擦摩耗調整剤を熱硬化性樹脂結
合剤で結合してなる摩擦材組成物であって、補強用繊維
材料として繊維長１５０μｍ以下の短繊維セルロースパ
ルプを２５〜３５容量％、有機充填材として最大粒子径
８４０μｍ以下の有機充填材を３０〜４０容量％、摩擦
摩耗調整剤として最大粒子径２５０μｍ以下の酸化アル
ミニウムおよび／または酸化マグネシウムを０．５〜５
容量％含み、かつ、気孔率が１５〜３０容量％であるこ
とを特徴としている。[Means and Actions for Solving Problems] The friction material composition of the present invention comprises a reinforcing fiber material, an organic filler, an inorganic filler and a friction and wear modifier which are bonded by a thermosetting resin binder. A friction material composition, which comprises 25-35% by volume of short fiber cellulose pulp having a fiber length of 150 μm or less as a reinforcing fiber material, and 30-40% by volume of an organic filler having a maximum particle diameter of 840 μm or less as an organic filler. Aluminum oxide and / or magnesium oxide having a maximum particle size of 250 μm or less is used as a wear modifier in an amount of 0.5 to 5
It is characterized by including volume% and having a porosity of 15 to 30 volume%.
補強用繊維材料としての短繊維セルロースパルプを２５
〜３５容量％含むのは、含有量は２５容量％より低いと
摩擦板強度が低下し耐摩耗性が悪くなって本発明の目的
を達成することができないからであり、３５容量％を越
えると摩擦係数の安定性が悪化し本発明の目的を達成す
ることができなくなるからである。25 short fiber cellulose pulp as a reinforcing fiber material
The content of ˜35% by volume is included because if the content is less than 25% by volume, the strength of the friction plate decreases and the wear resistance deteriorates, and the object of the present invention cannot be achieved. This is because the stability of the friction coefficient deteriorates and the object of the present invention cannot be achieved.
本発明において摩擦摩耗調整剤として用いられるのは、
酸化アルミニウムおよび酸化マグネシウムである。これ
らは、いずれか一方を単独で用いてもよいし、また双方
を併用してもよい。酸化アルミニウムおよび／または酸
化マグネシウムの含有量は、０．５〜５容量％である。
含有量が０．５容量％より少ないと、摩擦係数が本発明
の目的である０．４より小さくなり耐摩耗性も急激に悪
くなる。また５容量％を越えると、摩擦係数は０．４よ
り大きくなるものの、その安定性が悪くなり、さらに相
手材への攻撃性が著しく増大して本発明の目的を達成す
ることができなくなる。The friction and wear modifier used in the present invention is
Aluminum oxide and magnesium oxide. One of these may be used alone, or both may be used in combination. The content of aluminum oxide and / or magnesium oxide is 0.5 to 5% by volume.
When the content is less than 0.5% by volume, the friction coefficient becomes smaller than 0.4 which is the object of the present invention, and the wear resistance sharply deteriorates. On the other hand, if it exceeds 5% by volume, the coefficient of friction becomes larger than 0.4, but the stability thereof deteriorates, and the aggressiveness to the mating material remarkably increases, so that the object of the present invention cannot be achieved.
また、本発明において摩擦摩耗調整剤として用いられる
酸化アルミニウムおよび酸化マグネシウムの最大粒子径
は、２５０μｍ以下であることが好ましい。２５０μｍ
よりも大きな粒子を用いると、摩擦材の摩耗量および相
手材への攻撃性が急激に増大し、摩擦係数の安定性が著
しく悪化するからである。The maximum particle size of aluminum oxide and magnesium oxide used as the friction and wear modifier in the present invention is preferably 250 μm or less. 250 μm
This is because if larger particles are used, the amount of wear of the friction material and the aggressiveness to the mating material abruptly increase, and the stability of the friction coefficient significantly deteriorates.
また、本発明では有機充填材として最大粒子径８４０μ
ｍ以下の有機充填材が３０〜４０容量％含まれる。有機
充填材の最大粒子径を８４０μｍ以下とするのは、それ
よりも大きな粒子径になると、他の原材料と均一に混合
することができなくなり、摩擦摩耗特性が劣化するから
である。Further, in the present invention, the maximum particle size of the organic filler is 840 μm.
The organic filler of m or less is contained in an amount of 30 to 40% by volume. The maximum particle size of the organic filler is set to 840 μm or less because if the particle size is larger than that, it cannot be uniformly mixed with other raw materials and the friction and wear characteristics are deteriorated.
電磁クラッチ用に使用される摩擦板は一般に対向する被
駆動側の伝動部材、たとえばアーマチュアに圧接して使
用されるものであり、この両者の圧接面の摩擦力によつ
て動力を伝達し、両者の圧接を解放することによって動
力の伝達を断つようにしている。この動作をスムーズに
行なわせるためには、摩擦板の圧縮特性が重要であり過
去の経験から、単位荷重（ｋｇ／ｃｍ２）あたりの圧縮
歪率が０．１％より大きなものが最適であることが明ら
かになっている。このため、有機充填材としては、コル
ク粉末および／またはカシュダストを用いることが好ま
しい。コルク粉末および／またはカシュダストを３０容
量％以上含有させることにより、圧縮歪率を０．１％以
上に調整することができる。しかしながら、コルク粉末
および／またはカシュダストの含有量が４０容量％を越
えると、圧縮歪率は０．１％以上となるが摩擦摩耗特性
が不安定になり望ましくない特性を示す。A friction plate used for an electromagnetic clutch is generally used by being pressed against opposing driven members, for example, an armature, and the friction force between the pressure contact surfaces of these two members transmits power to the friction members. The transmission of power is cut off by releasing the pressure contact of. In order to perform this operation smoothly, the compression characteristic of the friction plate is important, and from the past experience, it is optimal that the compression strain rate per unit load (kg / cm 2 ) is larger than 0.1%. It is clear. Therefore, it is preferable to use cork powder and / or cash dust as the organic filler. By containing cork powder and / or cash dust in an amount of 30% by volume or more, the compression strain rate can be adjusted to 0.1% or more. However, when the content of cork powder and / or cash dust exceeds 40% by volume, the compressive strain rate becomes 0.1% or more, but the friction and wear characteristics become unstable, which is undesirable.
また本発明に用いられる無機充填材としては、従来から
一般に用いられている無機充填材を用いることができ、
たとえば炭酸カルシウム等を挙げることができる。Further, as the inorganic filler used in the present invention, it is possible to use an inorganic filler that has been generally used conventionally,
For example, calcium carbonate can be used.
さらに、本発明の摩擦材組成物は、その気孔率が１５〜
３０容量％であることが必要である。気孔率が１５容量
％より小さくなると、摩擦材の圧縮歪率が小さくなり、
初期状態の摩擦係数が低下し、摩擦板表面に著しい色む
らを生じて商品価値が低下する。また、気孔率が３０容
量％を越えると、摩擦材の圧縮歪率は大きくなり、その
結果として初期の摩擦係数は高められるが、摩擦材の機
械的強度が著しく低下し、耐摩耗性が劣化するため、本
発明の目的を達成することができなくなる。Further, the porosity of the friction material composition of the present invention is 15 to.
It is necessary to be 30% by volume. When the porosity is less than 15% by volume, the compressive strain rate of the friction material decreases,
The friction coefficient in the initial state is reduced, and the color of the friction plate is remarkably colored, resulting in a decrease in commercial value. Further, when the porosity exceeds 30% by volume, the compressive strain rate of the friction material becomes large, and as a result, the initial friction coefficient is increased, but the mechanical strength of the friction material is significantly reduced and the wear resistance is deteriorated. Therefore, the object of the present invention cannot be achieved.
［実施例］ 以下、実施例により本発明を詳細に説明する。[Examples] Hereinafter, the present invention will be described in detail with reference to Examples.
補強用繊維材料として短繊維セルロースパルプを、効充
填材としてコルク粉末、カシュダストおよび合成ゴム
を、無機充填材として炭酸カルシウムを、摩擦摩耗調整
剤として酸化アルミニウムまたは酸化マグネシウムを、
熱硬化性樹脂結合剤として粉末フェノール樹脂を用い
て、第１表に示す配合割合で配合し、混合機により均一
に混合した。この混合物を所定量秤量し、圧縮成形機で
成形した。成形条件は面圧１００ｋｇ／ｃｍ２、型温度
１６５℃、成形時間４分で行なった。その後、さらに２
００℃、５時間熱処理し、次に表面を研摩してクラッチ
フェーシングを作成した。これらのクラッチフェーシン
グの気孔率を、特願昭６１−１９０１に開示された気孔
率迅速測定法により測定し、その結果を第１表に併せて
示した。Short fiber cellulose pulp as a reinforcing fiber material, cork powder as effective filler, cash dust and synthetic rubber, calcium carbonate as an inorganic filler, aluminum oxide or magnesium oxide as a friction and wear modifier,
Powdered phenolic resin was used as a thermosetting resin binder, compounded at the compounding ratio shown in Table 1, and uniformly mixed by a mixer. A predetermined amount of this mixture was weighed and molded by a compression molding machine. The molding conditions were a surface pressure of 100 kg / cm 2 , a mold temperature of 165 ° C., and a molding time of 4 minutes. Then 2 more
Heat treatment was performed at 00 ° C. for 5 hours, and then the surface was polished to form a clutch facing. The porosities of these clutch facings were measured by the rapid porosity measuring method disclosed in Japanese Patent Application No. 61-1901, and the results are also shown in Table 1.
以上のようにして得られた実施例Ａ〜Ｇ、比較例Ｈ〜Ｌ
および従来例Ｍのクラッチフェーシングを、スラスト式
摩擦摩耗試験機を用いて、第２表に示すテスト条件でシ
ミュレーション試験した。 Examples A to G and comparative examples H to L obtained as described above
The clutch facing of Conventional Example M was subjected to a simulation test under the test conditions shown in Table 2 using a thrust type friction wear tester.
その結果を第３表に示す。The results are shown in Table 3.
第３表に示されるように、本発明の実施例Ａ〜Ｇは、い
ずれも相手攻撃性が悪くなることなしに、初期状態の摩
擦係数が安定状態における摩擦係数よりも高く、しかも
０．４よりも高いという条件を満足している。 As shown in Table 3, in each of Examples A to G of the present invention, the friction coefficient in the initial state was higher than that in the stable state, and 0.4 Satisfies the condition of higher than.
ここで、実施例Ｅ、比較例Ｈおよび従来例Ｍについての
電磁クラッチのシミュレーション試験における断続回数
と静摩擦係数との関係を第１図に示す。第１図に示され
るように、実施例Ｅは、常に従来例Ｍよりも高い静摩擦
係数を示している。しかも、実施例Ｅの初期状態におけ
る静摩擦係数は、安定状態における静摩擦係数よりも高
い値を示しており、電磁クラッチに要求される特性を満
足している。Here, FIG. 1 shows the relationship between the number of interruptions and the coefficient of static friction in the electromagnetic clutch simulation tests for Example E, Comparative Example H, and Conventional Example M. As shown in FIG. 1, Example E always exhibits a higher coefficient of static friction than Conventional Example M. Moreover, the static friction coefficient in the initial state of Example E is higher than the static friction coefficient in the stable state, which satisfies the characteristics required for the electromagnetic clutch.
第２図には、実施例Ｅ、比較例Ｈおよび従来例Ｍについ
ての電磁クラッチシミュレーション試験における摩耗量
を棒グラフで示す。第２図に示されるように、本発明の
実施例Ｅは従来例Ｍと同様の良好な耐摩耗性を有してい
る。FIG. 2 is a bar graph showing the amount of wear in the electromagnetic clutch simulation test for Example E, Comparative Example H, and Conventional Example M. As shown in FIG. 2, Example E of the present invention has the same good wear resistance as Conventional Example M.
次に摩擦材組成物の気孔率の影響について検討するた
め、第１表実施例Ｄの配合割合で、気孔率の異なるクラ
ッチフェーシングを作製した。Next, in order to examine the influence of the porosity of the friction material composition, clutch facings having different porosities were prepared with the compounding ratios of Example D in Table 1.
第４表に示されるように、気孔率が１５〜３０容量％の
本発明の範囲内にある実施例Ｎ，Ｄ，Ｏは、いずれも初
期状態の摩擦係数が安定状態の摩擦係数よりも高く、ま
た摩擦量、相手攻撃性、材料強度および外観の面で優れ
ていた。これに対し、気孔率が１０容量％の比較例Ｐ
は、初期状態における摩擦係数が安定状態の摩擦係数よ
りも小さく、また摩擦板表面に色むらを生じ外観上好ま
しいものでなかった。気孔率が３５容量％である比較例
Ｑは、摩耗量が多く、材料強度が劣っていた。As shown in Table 4, in each of Examples N, D, and O having a porosity within the range of 15 to 30% by volume of the present invention, the friction coefficient in the initial state was higher than that in the stable state. Moreover, it was excellent in terms of friction amount, opponent attack, material strength and appearance. On the other hand, Comparative Example P having a porosity of 10% by volume
Was not preferable in appearance because the friction coefficient in the initial state was smaller than that in the stable state and color unevenness was generated on the surface of the friction plate. In Comparative Example Q having a porosity of 35% by volume, the amount of wear was large and the material strength was poor.
［発明の効果］ 本発明の摩擦材組成物は、従来のアラミド繊維をベース
としたノンアスベスト摩擦材とほぼ同等の耐摩耗性を有
し、しかも初期の使用状態から既に高い摩擦係数を示す
ため、電磁クラッチ用の摩擦材として好適なものであ
る。特に、電磁クラッチのトルク伝達能力が従来の摩擦
材に比較して大幅に改善できるため、事務機器や産業機
械の駆動用の電磁クラッチに応用して、その小型化およ
び軽量化を図ることができる。[Effects of the Invention] The friction material composition of the present invention has almost the same wear resistance as that of the conventional non-asbestos friction material based on aramid fiber, and yet exhibits a high friction coefficient from the initial use state. It is suitable as a friction material for an electromagnetic clutch. In particular, since the torque transmission capacity of the electromagnetic clutch can be greatly improved compared to the conventional friction material, it can be applied to the electromagnetic clutch for driving office equipment and industrial machines to reduce its size and weight. .
また、本発明の摩擦材組成物の完粉は、従来のように綿
状でなく、流動性を有した状態であるため、取扱いが用
意で製造工程を従来よりも短縮化することが可能にな
る。さらに、本発明の摩擦材組成物は、高価なアラミド
繊維を全く用いていないので、低価格化を図ることがで
きる。Further, since the finished powder of the friction material composition of the present invention is not cotton like the conventional one and has a fluidity, it can be handled easily and the manufacturing process can be shortened as compared with the conventional one. Become. Further, since the friction material composition of the present invention does not use expensive aramid fiber at all, the cost can be reduced.
第１図は、電磁クラッチのシミュレーション試験におけ
る断続回数と静摩擦係数の関係を示す図である。第２図
は、電磁クラッチのシミュレーション試験における摩耗
量を示す図である。FIG. 1 is a diagram showing the relationship between the number of interruptions and the coefficient of static friction in a simulation test of an electromagnetic clutch. FIG. 2 is a diagram showing the amount of wear in the electromagnetic clutch simulation test.
Claims (4)
および摩擦摩耗調整剤を熱硬化性結合剤で結合してなる
摩擦材組成物であって、 補強用繊維材料として繊維長１５０μｍ以下の短繊維セ
ルロースパルプを２５〜３５容量％、有機充填材として
最大粒子径８４０μｍ以下の有機充填材を３０〜４０容
量％、摩擦摩耗調整剤として最大粒子径２５０μｍ以下
の酸化アルミニウムおよび／または酸化マグネシウムを
０．５〜５容量％含み、かつ、気孔率が１５〜３０容量
％であることを特徴とする、摩擦材組成物。1. A friction material composition obtained by binding a reinforcing fiber material, an organic filler, an inorganic filler and a friction wear modifier with a thermosetting binder, wherein the reinforcing fiber material has a fiber length of 150 μm or less. 25 to 35% by volume of short fiber cellulose pulp, 30 to 40% by volume of organic filler having a maximum particle size of 840 μm or less as an organic filler, and aluminum oxide and / or magnesium oxide having a maximum particle size of 250 μm or less as a friction and wear modifier. Is contained in an amount of 0.5 to 5% by volume, and the porosity is 15 to 30% by volume.
特徴とする、特許請求の範囲第１項記載の摩擦材組成
物。2. The friction material composition according to claim 1, wherein the organic filler is cork powder.
を特徴とする、特許請求の範囲第１項記載の摩擦材組成
物。3. The friction material composition according to claim 1, wherein the organic filler is cash dust.
ダストであることを特徴とする、特許請求の範囲第１項
記載の摩擦材組成物。4. The friction material composition according to claim 1, wherein the organic filler is cork powder and cash dust.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16848887A JPH0619197B2 (en) | 1987-07-06 | 1987-07-06 | Friction material composition |
| DE8787117812T DE3774673D1 (en) | 1986-12-04 | 1987-12-02 | COMPOSED FRICTION MATERIAL. |
| US07/128,405 US4895882A (en) | 1986-12-04 | 1987-12-02 | Friction material composite |
| EP87117812A EP0270089B1 (en) | 1986-12-04 | 1987-12-02 | Friction material composite |
| KR1019870013826A KR910010174B1 (en) | 1986-12-04 | 1987-12-04 | Friction material composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16848887A JPH0619197B2 (en) | 1987-07-06 | 1987-07-06 | Friction material composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6412147A JPS6412147A (en) | 1989-01-17 |
| JPH0619197B2 true JPH0619197B2 (en) | 1994-03-16 |
Family
ID=15869018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16848887A Expired - Lifetime JPH0619197B2 (en) | 1986-12-04 | 1987-07-06 | Friction material composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619197B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194172A (en) * | 2013-03-20 | 2013-07-10 | 咸阳非金属矿研究设计院有限公司 | Non-asbestos composite fiber and preparation method thereof |
-
1987
- 1987-07-06 JP JP16848887A patent/JPH0619197B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6412147A (en) | 1989-01-17 |
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