JP2001262128A - Friction material composition and friction material using the same - Google Patents
Friction material composition and friction material using the sameInfo
- Publication number
- JP2001262128A JP2001262128A JP2000073957A JP2000073957A JP2001262128A JP 2001262128 A JP2001262128 A JP 2001262128A JP 2000073957 A JP2000073957 A JP 2000073957A JP 2000073957 A JP2000073957 A JP 2000073957A JP 2001262128 A JP2001262128 A JP 2001262128A
- Authority
- JP
- Japan
- Prior art keywords
- friction material
- weight
- fiber
- fluororesin
- material composition
- 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
Landscapes
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Braking Arrangements (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車、鉄道車
両、各種産業用機械等の制動に用いられるディスクブレ
ーキパッド、ブレーキライニング等の摩擦材に適した摩
擦材組成物及び摩擦材組成物を用いた摩擦材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction material composition suitable for a friction material such as a disc brake pad and a brake lining used for braking automobiles, railway vehicles, various industrial machines, and the like. Friction material.
【０００２】[0002]
【従来の技術】自動車、鉄道車両、各種産業用機械等に
は、その制動のため摩擦材が使用されている。この摩擦
材として従来のディスクブレーキパッドとしては、特公
昭５９−４４６２号公報、特開平６−１８４５２５号公
報等に示されるように補強繊維として、スチール繊維、
黄銅繊維、銅繊維等の金属繊維、アクリル繊維、アラミ
ド繊維、フェノール繊維等の有機質繊維、ロックウー
ル、チタン酸カリウム繊維、アルミナシリカ繊維、カー
ボン繊維等の無機質繊維を組み合わせたものを基材と
し、これに結合剤としてフェノール樹脂、エポキシ樹
脂、メラミン樹脂、カシュー樹脂等の熱硬化性樹脂やＮ
ＢＲ、ＳＢＲ、ＩＲ等のゴム組成物を含む結合剤、カシ
ューダスト、ゴムダスト等の有機質摩擦調整剤、硫酸バ
リウム、黒鉛、三硫化アンチモン、マイカ、ジルコニ
ア、シリカ、アルミナ炭酸カルシウム、炭酸マグネシウ
ム等の無機質摩擦調整剤などが用いられ、さらに必要に
応じて黄銅、真鍮、銅等の金属を含む混合物を加熱加圧
成形したものが一般に知られている。2. Description of the Related Art Friction materials are used in automobiles, railway vehicles, various industrial machines and the like for braking. As a conventional disc brake pad as this friction material, steel fibers as reinforcing fibers as shown in JP-B-59-4462, JP-A-6-184525 and the like are used.
Brass fiber, metal fiber such as copper fiber, acrylic fiber, aramid fiber, organic fiber such as phenol fiber, rock wool, potassium titanate fiber, alumina silica fiber, and a combination of inorganic fibers such as carbon fiber as a base material, Thermosetting resins such as phenolic resin, epoxy resin, melamine resin, cashew resin and N
Binders including rubber compositions such as BR, SBR, IR, etc., organic friction modifiers such as cashew dust, rubber dust, etc., inorganic substances such as barium sulfate, graphite, antimony trisulfide, mica, zirconia, silica, alumina calcium carbonate, magnesium carbonate, etc. It is generally known that a mixture containing a metal such as brass, brass, or copper is heated and pressed as necessary, using a friction modifier or the like.
【０００３】しかしながら、従来のディスクブレーキパ
ッドは、ブレーキペダルを踏み制動したときの止まり際
又はそれから発進するためブレーキペダルの踏力を弱め
たとき、即ち揺り戻し時などに、グー音と称する２００
〜３００Ｈｚ付近の異音が発生し、グー音の音圧が高い
場合ユーザーにとっては、故障の前兆とみなすことがあ
る。このグー音は、ディスクブレーキパッドと相手材の
ディスクローター間のスティックスリップを起振源と
し、サスペンション部品を共振系として発生し、特に絶
対湿度が高いとき及び夜間一晩駐車した場合に大きくな
る。However, the conventional disk brake pad is called a goo noise when the brake pedal is stopped by depressing the brake pedal or when the brake pedal is weakened to depart from the brake pedal, that is, when the brake pedal returns.
In the case where an abnormal sound around 300 Hz is generated and the sound pressure of the goo sound is high, it may be regarded as a sign of failure for the user. The goo noise is caused by stick-slip between the disc brake pad and the disc rotor of the mating member as a vibration source, and a suspension component is generated as a resonance system. The goo noise is particularly large when the absolute humidity is high and the vehicle is parked overnight at night.
【０００４】この主原因は、絶対湿度が高いとき及び夜
間一晩駐車したときに、ディスクローター表面に生成さ
れるトランスファーフィルムに水分が吸着し、この水分
が原因でディスクローターとトランスファーフィルム間
に錆を発生させ、再運転する際運転初期時にトランスフ
ァーフィルムが剥離することで静動μ低下比が大きくな
ってグー音の音圧を大きくしていると考えられる。The main cause of this is that when the absolute humidity is high and when the vehicle is parked overnight, moisture is adsorbed on the transfer film formed on the surface of the disk rotor, and this moisture causes rust between the disk rotor and the transfer film. It is considered that the transfer film is peeled off at the initial stage of the operation at the time of re-operation and the static μ reduction ratio is increased to increase the sound pressure of the goo noise.
【０００５】[0005]
【発明が解決しようとする課題】請求項１、２及び３記
載の発明は、絶対湿度が高いとき及び夜間一晩駐車した
ときのグー音の発生及び音圧を低減することが可能な摩
擦材に適した摩擦材組成物を提供するものである。請求
項４記載の発明は、絶対湿度が高いとき及び夜間一晩駐
車したときのグー音の発生及び音圧を低減することが可
能な摩擦材を提供するものである。SUMMARY OF THE INVENTION According to the first, second and third aspects of the present invention, a friction material capable of reducing the generation of goo noise and the sound pressure when the absolute humidity is high and the vehicle is parked overnight at night. The present invention provides a friction material composition suitable for: The fourth aspect of the present invention provides a friction material capable of reducing goof noise and reducing sound pressure when absolute humidity is high and when parking is performed overnight at night.
【０００６】[0006]
【課題を解決するための手段】本発明は、フッ素樹脂を
被覆した有機繊維を含有してなる摩擦材組成物に関す
る。また、本発明は、フッ素樹脂の被覆量が有機繊維に
対して０．１〜１０重量％である摩擦材組成物に関す
る。また、本発明は、フッ素樹脂を被覆した有機繊維が
全組成物中に０．５〜１０重量％含有してなる摩擦材組
成物に関する。さらに、本発明は、上記の摩擦材組成物
を加熱加圧成形してなる摩擦材に関する。SUMMARY OF THE INVENTION The present invention relates to a friction material composition containing an organic fiber coated with a fluororesin. Further, the present invention relates to a friction material composition in which the coating amount of the fluororesin is 0.1 to 10% by weight based on the organic fibers. In addition, the present invention relates to a friction material composition in which organic fibers coated with a fluororesin are contained in the total composition in an amount of 0.5 to 10% by weight. Further, the present invention relates to a friction material obtained by heating and pressing the above friction material composition.
【０００７】[0007]
【発明の実施の形態】有機繊維は、制動により相手材の
ディスクロータに移着し、ディスクロータ表面に被膜を
形成する。この有機繊維にフッ素樹脂を被覆すること
で、有機繊維がディスクロータに移着するときにフッ素
樹脂も一緒に移着されるため、ディスクロータ表面に撥
水性の被膜を形成する。これにより水の影響を受け難く
なり、ディスクロータとトランスファーフィルム間の錆
の発生が抑制される。錆は、絶対湿度の高いとき及び夜
間一晩駐車したときに発生し易いため、ディスクロータ
とトランスファーフィルム間の錆の発生を抑制すること
は、絶対湿度の高いとき及び夜間一晩駐車したときのグ
ー音の音圧を低下させることができるものと考え、本発
明を完成するに至った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Organic fibers are transferred to a counterpart disk rotor by braking and form a coating on the disk rotor surface. By coating the organic fibers with the fluororesin, the fluororesins are also transferred when the organic fibers are transferred to the disk rotor, so that a water-repellent coating is formed on the disk rotor surface. This makes it less susceptible to water and suppresses the generation of rust between the disk rotor and the transfer film. Since rust easily occurs when the absolute humidity is high and when parking overnight at night, suppressing the generation of rust between the disk rotor and the transfer film is only possible when the absolute humidity is high and when parking overnight at night. It was thought that the sound pressure of the goo sound could be reduced, and the present invention was completed.
【０００８】本発明において、有機繊維に表面処理する
フッ素樹脂の量は、有機繊維に対して、０．１〜１０重
量％、好ましくは０．５〜７重量％、さらに好ましくは
１．０〜５重量％の範囲とされ、０．１重量％未満であ
るとグー音の音圧低下の効果が得られなくなる傾向があ
り、また１０．０重量％を越えると摩擦材にクラックが
発生する傾向がある。In the present invention, the amount of the fluororesin to be surface-treated on the organic fiber is from 0.1 to 10% by weight, preferably from 0.5 to 7% by weight, more preferably from 1.0 to 10% by weight, based on the organic fiber. When the content is less than 0.1% by weight, the effect of reducing the sound pressure of the goo sound tends not to be obtained, and when it exceeds 10.0% by weight, the friction material tends to crack. There is.
【０００９】本発明に用いられるフッ素樹脂としては、
例えば、テトラフルオロエチレン（ＰＴＦＥ）、フッ化
エチレンポリプロピレンコポリマー（ＦＥＰ）、テトラ
フルオロエチレン−パーフロロアルキルビニルエーテル
コポリマー（ＰＦＡ）等が挙げられ、このうちテトラフ
ルオロエチレン（ＰＴＦＥ）を用いることが好ましい。
また、有機繊維としては、例えばアラミド繊維、アクリ
ル繊維、フェノール繊維等が挙げられ、このうちアラミ
ド繊維を用いることが好ましい。The fluororesin used in the present invention includes:
For example, tetrafluoroethylene (PTFE), fluorinated ethylene polypropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) and the like can be mentioned, and among them, tetrafluoroethylene (PTFE) is preferably used.
Examples of the organic fiber include aramid fiber, acrylic fiber, and phenol fiber, and among them, it is preferable to use aramid fiber.
【００１０】フッ素樹脂を被覆した有機繊維の含有量
は、全組成物中に０．５〜１０重量％、好ましくは１〜
８重量％、さらに好ましくは２〜７重量％の範囲とさ
れ、０．５重量％未満であると成形性が悪化すると共に
摩擦係数が不安定となる傾向があり、また１０重量％を
越えるとフェード性能が悪化する傾向がある。The content of the organic fiber coated with the fluororesin is 0.5 to 10% by weight, preferably 1 to 10% by weight in the whole composition.
If it is less than 0.5% by weight, the moldability tends to deteriorate and the friction coefficient tends to be unstable, and if it exceeds 10% by weight, the content exceeds 10% by weight. Fade performance tends to deteriorate.
【００１１】本発明における摩擦材の材質は、セミメタ
リック系、ノンスチール系のいずれにも適用でき特に制
限はない。また、摩擦材に用いられる材料は、上記のフ
ッ素樹脂及び有機繊維の他、一般に公知の材料が用いら
れ、例えばスチール繊維、黄銅繊維、銅繊維、セラミッ
ク繊維、ロックウール、チタン酸カリウム繊維、カーボ
ン繊維等の繊維状物質、フェノール樹脂、エポキシ樹
脂、メラミン樹脂、カシュー樹脂等の熱硬化性樹脂やＮ
ＢＲ、ＳＢＲ、ＩＲ等のゴム組成物を含む結合剤、ゴム
ダストなどの有機質摩擦調整剤、硫酸バリウム、黒鉛、
三硫化アンチモン、マイカ、ジルコニア、シリカ、アル
ミナ炭酸カルシウム、炭酸マグネシウム等の無機質摩擦
調整剤などが用いられ、さらに必要に応じて黄銅、真
鍮、銅等の金属粉が添加される。The material of the friction material in the present invention can be applied to any of a semi-metallic type and a non-steel type, and is not particularly limited. The material used for the friction material is, in addition to the above-described fluororesin and organic fiber, generally known materials, such as steel fiber, brass fiber, copper fiber, ceramic fiber, rock wool, potassium titanate fiber, and carbon fiber. Fibrous substances such as fibers, thermosetting resins such as phenolic resins, epoxy resins, melamine resins, cashew resins, and N
Binders containing rubber compositions such as BR, SBR, IR, organic friction modifiers such as rubber dust, barium sulfate, graphite,
Inorganic friction modifiers such as antimony trisulfide, mica, zirconia, silica, alumina calcium carbonate, and magnesium carbonate are used, and metal powders such as brass, brass, and copper are added as necessary.
【００１２】上記におけるフッ素樹脂を被覆した有機繊
維を含む繊維状物質の含有量は、全組成物中に３０〜６
０重量％含有することが好ましく、４０〜５０重量％含
有することがより好ましい。結合剤の含有量は、全組成
物中に３〜２５重量％含有することが好ましく、５〜１
５重量％含有することがより好ましい。有機摩擦調整剤
の含有量は、全組成物中に１〜２５重量％含有すること
が好ましく、３〜２０重量％含有することがより好まし
い。また無機質摩擦調整剤の含有量は、全組成物中に２
０〜５０重量％含有することが好ましく、２５〜４５重
量％含有することがより好ましい。なお、必要に応じて
添加する金属粉の含有量は、全組成物中に１〜２０重量
％含有することが好ましく、３〜１５重量％含有するこ
とがより好ましい。これらの成分は、全組成物が１００
重量％となるように配合される。The content of the fibrous substance containing the organic fiber coated with the fluororesin is 30 to 6 in the total composition.
The content is preferably 0% by weight, more preferably 40 to 50% by weight. The content of the binder is preferably 3 to 25% by weight in the whole composition, and 5 to 1% by weight.
More preferably, the content is 5% by weight. The content of the organic friction modifier is preferably 1 to 25% by weight, more preferably 3 to 20% by weight in the whole composition. The content of the inorganic friction modifier is 2% in the total composition.
The content is preferably 0 to 50% by weight, more preferably 25 to 45% by weight. The content of the metal powder to be added as necessary is preferably 1 to 20% by weight, more preferably 3 to 15% by weight in the whole composition. These components have a total composition of 100
% By weight.
【００１３】本発明になる摩擦材は、フッ素樹脂を被覆
した有機繊維を含む繊維状物質、結合剤及び摩擦調整
剤、必要に応じて金属粉を含む材料を加えて均一に混合
し、この混合物を予備成形し、次いで金型内に裏金及び
予備成形体を挿設した後、加熱加圧成形法で成形し、そ
の後熱処理を行い、必要に応じて表面の有機成分を除去
するためスコーチ処理を行って得られる。なお成形する
際の加熱温度は１３０〜１７０℃が好ましく、１４０〜
１６０℃がより好ましい。圧力は３０〜６０MPaが好ま
しく、４０〜５０MPaがより好ましい。熱処理温度は１
００〜３００℃が好ましく、１５０〜２５０℃がより好
ましい。必要に応じて行うスコーチ処理は、摩擦部材に
熱盤を押し当てる方法、ガスの炎などの直火で加熱する
方法、遠赤外線などの輻射熱で加熱する方法等があり特
に制限はない。またスコーチ処理の条件については、そ
の材質に合った条件を選定して処理すればよい。The friction material according to the present invention is mixed with a fibrous substance containing organic fibers coated with a fluororesin, a binder and a friction modifier, and if necessary, a material containing metal powder, and uniformly mixed. Pre-molded, then insert the backing metal and the pre-molded body into the mold, mold by the heat and pressure molding method, then perform heat treatment, and if necessary, perform scorch treatment to remove organic components on the surface Obtained by going. The heating temperature at the time of molding is preferably 130 to 170 ° C, and 140 to 170 ° C.
160 ° C. is more preferred. The pressure is preferably from 30 to 60 MPa, more preferably from 40 to 50 MPa. Heat treatment temperature is 1
The temperature is preferably from 00 to 300 ° C, more preferably from 150 to 250 ° C. The scorch treatment performed as necessary includes a method of pressing a hot plate against a friction member, a method of heating with a direct flame such as a gas flame, and a method of heating with radiant heat such as far infrared rays, and is not particularly limited. Further, as for the conditions of the scorch processing, the processing may be performed by selecting conditions suitable for the material.
【００１４】[0014]
【実施例】以下本発明を実施例により説明する。 実施例１ アラミド繊維に対してフッ素樹脂としてテトラフルオロ
エチレン（ＰＴＦＥ）を３重量％被覆したフッ素樹脂被
覆アラミド繊維及び表１に示す他の成分を表１に示す量
秤量し、混合機で３０００r/minの回転速度で４分間混
合し、摩擦材組成物Ａを得た。The present invention will be described below with reference to examples. Example 1 Aramid fibers were coated with a fluororesin-coated aramid fiber coated with 3% by weight of tetrafluoroethylene (PTFE) as a fluororesin, and other components shown in Table 1 were weighed as shown in Table 1, and 3,000 r / m. The mixture was mixed at a rotation speed of min for 4 minutes to obtain a friction material composition A.
【００１５】実施例２ アラミド繊維に対してフッ素樹脂としてテトラフルオロ
エチレン（ＰＴＦＥ）を０．１重量％被覆したフッ素樹
脂被覆アラミド繊維及び表１に示す他の成分を表１に示
す量秤量し、混合機で３０００r/minの回転速度で４分
間混合し、摩擦材組成物Ｂを得た。Example 2 A fluororesin-coated aramid fiber obtained by coating aramid fiber with 0.1% by weight of tetrafluoroethylene (PTFE) as a fluororesin and other components shown in Table 1 were weighed as shown in Table 1, The mixture was mixed at a rotation speed of 3000 r / min for 4 minutes with a mixer to obtain a friction material composition B.
【００１６】実施例３ アラミド繊維に対してフッ素樹脂としてテトラフルオロ
エチレン（ＰＴＦＥ）を１０重量％被覆したフッ素樹脂
被覆アラミド繊維及び表１に示す他の成分を表１に示す
量秤量し、混合機で３０００r/minの回転速度で４分間
混合し、摩擦材組成物Ｃを得た。Example 3 Fluorine resin-coated aramid fibers obtained by coating 10% by weight of tetrafluoroethylene (PTFE) as a fluorine resin with respect to aramid fibers and other components shown in Table 1 were weighed and mixed as shown in Table 1 and mixed. The mixture was mixed at a rotation speed of 3000 r / min for 4 minutes to obtain a friction material composition C.
【００１７】比較例１ アラミド繊維に対してフッ素樹脂としてテトラフルオロ
エチレン（ＰＴＦＥ）を０．０５重量％被覆したフッ素
樹脂被覆アラミド繊維及び表１に示す他の成分を表１に
示す量秤量し、混合機で３０００r/minの回転速度で４
分間混合し、摩擦材組成物Ｄを得た。COMPARATIVE EXAMPLE 1 A fluororesin-coated aramid fiber obtained by coating 0.05% by weight of tetrafluoroethylene (PTFE) as a fluororesin on an aramid fiber and other components shown in Table 1 were weighed as shown in Table 1. 4 at a rotation speed of 3000 r / min with a mixer
After mixing for 3 minutes, a friction material composition D was obtained.
【００１８】比較例２ アラミド繊維に対してフッ素樹脂としてテトラフルオロ
エチレン（ＰＴＦＥ）を１１重量％被覆したフッ素樹脂
被覆アラミド繊維及び表１に示す他の成分を表１に示す
量秤量し、混合機で３０００r/minの回転速度で４分間
混合し、摩擦材組成物Ｅを得た。Comparative Example 2 A fluororesin-coated aramid fiber coated with 11% by weight of tetrafluoroethylene (PTFE) as a fluororesin to aramid fiber and other components shown in Table 1 were weighed as shown in Table 1 and mixed. For 4 minutes at a rotation speed of 3000 r / min to obtain a friction material composition E.
【００１９】比較例３ フッ素樹脂を被覆しないアラミド繊維及び表１に示す他
の成分を表１に示す量秤量し、混合機で３０００r/min
の回転速度で４分間混合し、摩擦材組成物Ｆを得た。Comparative Example 3 Aramid fibers not coated with a fluororesin and other components shown in Table 1 were weighed as shown in Table 1, and were weighed at 3000 r / min with a mixer.
At a rotation speed of 4 minutes to obtain a friction material composition F.
【００２０】次に、実施例１〜３及び比較例１〜３で得
られた摩擦材組成物Ａ、Ｂ、Ｃ、Ｄ、Ｅ及びＦを各々予
備成形し、次いで金型内にディスクブレーキパッドの裏
金及び予備成形体を挿設し、その後１５０±２．５℃、
圧力４９MPaの条件で５分間加熱加圧成形した。さらに
２００℃で５時間熱処理を行い、冷却後研磨し、４７０
±１０℃で５分間の表面スコーチ処理を行って端部から
端部までの長さが１２７mmのディスクブレーキパッド
Ａ、Ｂ、Ｃ、Ｄ、Ｅ及びＦを得た。Next, the friction material compositions A, B, C, D, E and F obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were each preformed, and then the disc brake pads were placed in a mold. Insert the backing metal and the preform, and then
Heat and pressure molding was performed for 5 minutes under the condition of a pressure of 49 MPa. Further, heat treatment is performed at 200 ° C. for 5 hours, and after cooling, polishing is performed.
Surface scorch treatment was performed at ± 10 ° C. for 5 minutes to obtain disc brake pads A, B, C, D, E and F having a length from end to end of 127 mm.
【００２１】[0021]
【表１】 [Table 1]
【００２２】次に上記で得られたディスクブレーキパッ
ドＡ、Ｂ、Ｃ、Ｄ及びＥについて比較試験を行った。そ
の試験結果を表２に示す。なおグー音の評価方法につい
ては、車両重量：１６００kg、ブレーキ型式：コレット
タイプ（シリンダ面積：２８cm2）、２０００ccオート
マチック車で、市街地走行を（１０００km）を行い、下
記の３条件のときのグー音の音圧を騒音計を用いてそれ
ぞれ測定し、その測定結果を表２に示す。Next, a comparative test was performed on the disc brake pads A, B, C, D and E obtained above. Table 2 shows the test results. The goo noise evaluation method was as follows: vehicle weight: 1600 kg, brake type: collet type (cylinder area: 28 cm 2 ), 2000cc automatic car, running in a city area (1000 km), and under the following three conditions: Were measured using a sound level meter, and the measurement results are shown in Table 2.
【００２３】測定条件１：絶対湿度が２〜５g/m3の環境
条件下で、制動前温度１３０℃で５０km/hの速度から
０．３Ｇで制動し、揺り戻し時のグー音を１０回測定
し、その平均値を求めた。 測定条件２：絶対湿度が１５〜１８g/m3の環境条件下
で、制動前温度１３０℃で５０km/hの速度から０．３Ｇ
で制動し、揺り戻し時のグー音を１０回測定し、その平
均値を求めた。 測定条件３：走行後に夜間一晩駐車し、翌朝エンジン始
動直後に２０km/hの速度から０．３Ｇで制動し、揺り戻
し時のグー音を５回測定し、その平均値を求めた。Measuring condition 1: Under environmental conditions with an absolute humidity of 2 to 5 g / m 3 , braking was performed at a temperature of 130 ° C. before braking at a speed of 50 km / h at a speed of 0.3 G, and a goo sound was returned ten times when the rocking returned. It measured and the average value was calculated | required. Measurement condition 2: 0.3 G from a speed of 50 km / h at a temperature before braking of 130 ° C. under an environmental condition of an absolute humidity of 15 to 18 g / m 3 .
And the goo sound at the time of swingback was measured 10 times, and the average value was obtained. Measurement condition 3: After driving, the vehicle was parked overnight at night, and immediately after the engine was started the next morning, braking was performed at a speed of 20 Gm / h at 0.3 G, and the goo noise at the time of swingback was measured five times, and the average value was obtained.
【００２４】[0024]
【表２】 [Table 2]
【００２５】表２に示されるように、本発明の実施例に
なる摩擦材組成物を用いたディスクブレーキパッドは、
グー音の音圧が低く、クラックの発生も認められなかっ
た。これに対し比較例１及び３の摩擦材組成物を用いた
ディスクブレーキパッドは、グー音の音圧が高く、特に
吸湿量が多くなるとさらにグー音の音圧が高くなり、ま
た比較例２の摩擦材組成物を用いたディスクブレーキパ
ッドは、クラックが発生するという欠陥が生じた。As shown in Table 2, the disc brake pad using the friction material composition according to the embodiment of the present invention is:
The sound pressure of the goo sound was low, and no crack was observed. On the other hand, the disc brake pads using the friction material compositions of Comparative Examples 1 and 3 have a high goo sound pressure, and particularly when the moisture absorption is increased, the goo sound pressure is further increased. The disk brake pad using the friction material composition had a defect that cracks occurred.
【００２６】[0026]
【発明の効果】請求項１における摩擦材組成物は、絶対
湿度が高いとき及び夜間一晩駐車したときのグー音の発
生及び音圧を低減することが可能な摩擦材を提供するこ
とができる。請求項２における摩擦材は、絶対湿度が高
いとき及び夜間一晩駐車したときのグー音の発生及び音
圧を低減することができ、工業的に極めて好適である。The friction material composition according to the first aspect can provide a friction material capable of reducing goof noise and reducing sound pressure when the absolute humidity is high and the vehicle is parked overnight at night. . The friction material according to claim 2 can reduce the generation of goo noise and the sound pressure when parking is performed at high absolute humidity or overnight at night, and is industrially extremely suitable.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０８Ｋ 9/04 Ｃ０８Ｋ 9/04 Ｃ０８Ｌ 61/06 Ｃ０８Ｌ 61/06 Ｄ０６Ｍ 15/256 Ｄ０６Ｍ 15/256 Ｆ１６Ｄ 69/02 Ｆ１６Ｄ 69/02 Ｃ // Ｂ２９Ｋ 105:12 Ｂ２９Ｋ 105:12 Ｂ２９Ｌ 31:16 Ｂ２９Ｌ 31:16 Ｆターム(参考） 3J058 BA21 FA01 FA11 FA21 FA31 FA35 GA15 GA20 GA26 GA28 GA37 GA45 GA54 GA55 GA65 GA92 GA95 4F071 AA26 AA27 AA56 AD01 AH07 AH17 DA05 4F204 AA16 AD16 AH17 FA01 FB01 FE27 FF06 FH06 FQ01 FQ15 4J002 BG001 CC031 CC032 CL061 FA041 FB261 FD200 GM03 4L033 AA08 AB01 AC03 CA17 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI Theme coat ゛ (Reference) C08K 9/04 C08K 9/04 C08L 61/06 C08L 61/06 D06M 15/256 D06M 15/256 F16D 69 / 02 F16D 69/02 C // B29K 105: 12 B29K 105: 12 B29L 31:16 B29L 31:16 F term (reference) 3J058 BA21 FA01 FA11 FA21 FA31 FA35 GA15 GA20 GA26 GA28 GA37 GA45 GA54 GA55 GA65 GA92 GA95 4F071 AA26 AA27 AA56 AD01 AH07 AH17 DA05 4F204 AA16 AD16 AH17 FA01 FB01 FE27 FF06 FH06 FQ01 FQ15 4J002 BG001 CC031 CC032 CL061 FA041 FB261 FD200 GM03 4L033 AA08 AB01 AC03 CA17
Claims (4)
てなる摩擦材組成物。1. A friction material composition comprising an organic fiber coated with a fluororesin.
０．１〜１０重量％である請求項１記載の摩擦材組成
物。2. The friction material composition according to claim 1, wherein the coating amount of the fluororesin is 0.1 to 10% by weight based on the organic fibers.
物中に０．５〜１０重量％含有してなる請求項１又は２
記載の摩擦材組成物。3. The composition according to claim 1, wherein the composition contains 0.5 to 10% by weight of an organic fiber coated with the fluororesin.
The friction material composition as described above.
を加熱加圧成形してなる摩擦材。4. A friction material formed by heating and pressing the friction material composition according to claim 1, 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000073957A JP2001262128A (en) | 2000-03-13 | 2000-03-13 | Friction material composition and friction material using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000073957A JP2001262128A (en) | 2000-03-13 | 2000-03-13 | Friction material composition and friction material using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001262128A true JP2001262128A (en) | 2001-09-26 |
Family
ID=18592095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000073957A Pending JP2001262128A (en) | 2000-03-13 | 2000-03-13 | Friction material composition and friction material using the same |
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| Country | Link |
|---|---|
| JP (1) | JP2001262128A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007103833A (en) * | 2005-10-07 | 2007-04-19 | Disco Abrasive Syst Ltd | Cutting device |
-
2000
- 2000-03-13 JP JP2000073957A patent/JP2001262128A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007103833A (en) * | 2005-10-07 | 2007-04-19 | Disco Abrasive Syst Ltd | Cutting device |
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