JPS6320952B2 - - Google Patents
Info
- Publication number
- JPS6320952B2 JPS6320952B2 JP9949179A JP9949179A JPS6320952B2 JP S6320952 B2 JPS6320952 B2 JP S6320952B2 JP 9949179 A JP9949179 A JP 9949179A JP 9949179 A JP9949179 A JP 9949179A JP S6320952 B2 JPS6320952 B2 JP S6320952B2
- Authority
- JP
- Japan
- Prior art keywords
- fibers
- string
- tex
- rayon
- thickness
- 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
Links
- 239000000835 fiber Substances 0.000 claims description 45
- 229920000297 Rayon Polymers 0.000 claims description 33
- 239000002964 rayon Substances 0.000 claims description 33
- 239000002783 friction material Substances 0.000 claims description 30
- 239000011162 core material Substances 0.000 claims description 16
- 239000003365 glass fiber Substances 0.000 claims description 15
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 9
- 239000004917 carbon fiber Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920001187 thermosetting polymer Polymers 0.000 claims description 7
- 239000010425 asbestos Substances 0.000 description 16
- 229910052895 riebeckite Inorganic materials 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 13
- 239000000203 mixture Substances 0.000 description 11
- 229910001369 Brass Inorganic materials 0.000 description 10
- 239000010951 brass Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 229920000742 Cotton Polymers 0.000 description 4
- 229920000877 Melamine resin Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002657 fibrous material Substances 0.000 description 4
- 239000012784 inorganic fiber Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 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
- 239000004640 Melamine resin Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- -1 but recently Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 229920001568 phenolic resin Polymers 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
- 244000226021 Anacardium occidentale Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 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
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000009730 filament winding Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Landscapes
- Ropes Or Cables (AREA)
Description
本発明は、自動車、産業用機械等に使用される
摩擦材料の繊維素材として極めて優れた性質を有
する摩擦材料用ひも状体に関するものである。
従来、クラツチフエーシング、ブレーキライニ
ング、デイスクパツド等の摩擦材料として広く使
用されてきた無機繊維素材は、アスベスト繊維で
あるが、最近になつて、アスベスト繊維資源の減
少及びアスベスト公害の問題が生じ、アスベスト
繊維を用いない摩擦材料に対する要求が高まつて
きた。
このような事情のもとに、現在、アスベスト繊
維に代わる他の、例えばガラス繊維等の無機質繊
維を摩擦材料の繊維素材として使用するための検
討が盛んに行なわれているが、また実用化されて
いないのが現状である。これは、アスベスト繊維
以外の例えばガラス繊維等の無機繊維が、アスベ
スト繊維に比べ、摩擦材料製造時に、これら繊維
素材の結合剤として用いるフエノール樹脂等の熱
硬化性樹脂を含浸させる工程において、その樹脂
保持能力が低いため、製造作業性が低下し、高強
度の摩擦材料が得られにくいこと、及びアスベス
ト繊維以外の同無機繊維を繊維素材として用いた
摩擦材料は、使用される温度により摩擦係数が大
きく異なり、高温時の摩擦係数が小さくなること
など解決すべき問題点が少なくないためである。
本発明者らは、これらの問題点を解決すべく鋭
意研究を重ねた結果、芯材とそれに交絡させた繊
維から成る複合糸において、比較的に樹脂保持能
力の大きいレーヨン繊維を芯材及びそれに交絡さ
せる繊維に混合し、場合によりさらに撚り合わせ
て太さ50〜30000テツクスのひも状に構成し、熱
硬化性樹脂を含浸させることにより、摩擦材料製
造時の製造作業性が良く、且つ、機械強度が高
く、温度変化による摩擦係数の変化の少ない極め
て高品質の摩擦材料が得られることを見い出し、
本発明をなすに至つた。
すなわち、本発明は、複数本のレーヨン糸又は
レーヨン糸と金属線から成る芯材に、レーヨン繊
維と、ガラス繊維及びカーボン繊維の中から選ば
れた少なくとも１種から成る混合繊維を交絡さ
せ、場合によりさらにこれを撚り合わせて太さ50
〜30000テツクスのひも状に構成し、熱硬化性樹
脂を含浸させたことを特徴とする摩擦材料用ひも
状体を提供するものである。
本発明のひも状体の芯材としては、レーヨン糸
単独又はレーヨン糸と金属線とを複数本組み合わ
せたものが用いられる。この芯材を形成するレー
ヨン糸又は金属線の形状は、フイラメント、糸、
細ひも、リボン等任意のものにすることができ
る。これらは、その複数本を撚り合わせたり、一
方を他方に巻きつけたり、編み込んだり、あるい
は接着することにより一体化して芯材とする。
この金属線としては、真鍮線、銅線、亜鉛線、
アルミニウム線、鉄線などを挙げることができる
が、これら金属線の中で特に望ましいものは、比
較的柔軟性があり、かさ高加工紐の製造作業性の
良い真鍮線と銅線と亜鉛線である。これらの金属
線をひも状体中に導入することにより、ひも状体
のバースト強度を向上することができ、しかも熱
伝導性を良くするため、摩擦材料として使用する
ときに生じる発熱を熱伝導により制御し、その使
用寿命を長くする効果を有する。
次に、この芯材に交絡させるための繊維混合物
としては、レーヨン繊維とガラス繊維、レーヨン
繊維とカーボン繊維、あるいはレーヨン繊維とガ
ラス繊維とカーボン繊維の混合物が用いられる。
特に望ましい繊維混合物は、適当な摩擦係数を有
し、機械強度を高くする効果を有するガラス繊維
20〜90重量％、樹脂含浸性を向上して交絡作業性
を良くし、かつ高温時の摩擦係数を高く保つ効果
を有するレーヨン繊維５〜80重量％から成るも
の、及びこれにさらに摩擦係数に微調整し、熱伝
導性を良くし、摩擦時の温度上昇を防ぐ効果を有
するカーボン繊維を５重量％以下の割合で加えた
ものである。この混合割合の繊維混合物を交絡繊
維として用いることにより、かさ高のひも状体を
能率良く製造することができ、しかも、特に高品
質の摩擦材料を得ることができる。また、交絡繊
維として用いる繊維混合物を構成するそれぞれの
繊維の切断長さは種々のものを使用可能である
が、平均切断長さ１〜200mmの範囲のものが特に
望ましい。この繊維混合物を芯材に交絡させるに
は、開繊させながらわた状の塊状物としたものを
薄いシート状に成形し、これを細長いテープ状に
カツトして、芯材の周囲にからませながら巻きつ
け、必要に応じ撚りを加えて固定するか、あるい
は、張設した芯材に繊維混合物を開繊させなが
ら、ポリビニルアルコールのようなのり剤と共に
吹き付けて芯材の周囲に付着させたのち、撚りを
かけて固定する。このようにして得たかさ高糸は
そのまま用いてもよいし、また複数本撚り合わせ
て必要な太さにして用いてもよい。
この芯材と繊維混合物との複合体は、最終的に
太さ50〜30000テツクスのひも状に構成すること
が必要である。ここでいうテツクスとは、長さ
1000ｍ当りのグラム重量で表わした太さの単位で
ある。
このひも状体の太さが50テツクスよりも細くな
ると、所要の大きさの摩擦材料を製造する際の製
造時間が長くなるため、製造作業性が悪くなる
し、また30000テツクスより太い場合には、結合
剤であるフエノール樹脂、尿素樹脂、メラミン樹
脂等の熱硬化性樹脂の含浸時間が長くなり、製造
作業性が悪くなるばかりか、できあがつた摩擦材
料の繊維分布状態が粗になり、バースト強度（破
壊が生じる回転数、単位rpm）等の機械強度が低
くなる。次いで、このひも状体にフエノール樹
脂、尿素樹脂、メラミン樹脂等の熱硬化性樹脂を
含浸させ、乾燥させる。これにより本発明の摩擦
材料用ひも状体が得られる。
このひも状体には、所望に応じ、摩擦係数を微
調整するための、各種摩擦調整剤（ポリテトラフ
ロロエチレン二硫化モリブデン、黒鉛、バライ
ト、カシユーダスト、ゴム、コルク等）、各種充
填剤（雲母、バーミキユライト炭カル、酸化クロ
ム、酸化アルミニウム、酸化ジルコニウム、酸化
ケイ素、ケイソウ土、ガラス粉末、酸化鉄等）等
を包含させることにより、また、熱硬化性樹脂に
上記各種摩擦調整剤、各種充填剤等を含有させる
ことにより、さらに高品質の摩擦材料を得ること
ができる。
本発明のひも状体を摩擦材料に使用する場合に
は、そのままで用いることもできるし、またひも
状体をさらに複数撚り合わせた構造（第５図参
照）、複数のひも状体をさらに別の金属線に巻き
つけた構造（第６図、第７図参照）にして用いる
こともできる。
本発明の摩擦材料用ひも状体を用いてクラツチ
フエーシング、ブレーキライニング、デイスクパ
ツド等の摩擦材料を製造する方法の例としては、
フイラメントワインデイング法により肉厚パイプ
状物を成形し、加熱硬化後、その硬化パイプ状物
を所定の厚さに輪切り状に切断し摩擦材料を成形
する、いわゆる湿式製造法、ひも状体を予備乾燥
し、その予備乾燥した熱硬化性樹脂含浸複合体を
所定の形状に予備成形した後、成形型に入れて加
熱プレスし摩擦材料を成形するいわゆる乾式製造
方法等の製造方法がある。
本発明の摩擦材料用ひも状体は、上記の製造方
法に従つて、容易に摩擦材料を製造することがで
きる。
次に、実施例及び比較例により本発明を具体的
に説明する。
実施例
第１図ないし第７図は、それぞれ本実施例の試
料番号１ないし７の摩擦材料用ひも状体をモデル
断面図で示したものである。
第８図および第９図は、それぞれ比較例の試料
番号１及び２の摩擦材料用ひも状体をモデル断面
図で示したものである。第１０図は第１図に示し
たひも状体の斜視図である。
(1) ひも状体試料の構成と調製法。
(1) 実施例試料番号１（第１図）
太さ15テツクスの３本のレーヨンスフ糸１
に平均長さ50mmのガラス繊維70重量％と平均
長さ50mmのレーヨンステープル30重量％とか
ら構成される交絡用混合繊維２を太さ840テ
ツクスになるように交絡させたものである。
(2) 実施例試料番号２（第２図）
太さ15テツクスの３本レーヨンスフ糸１と
太さ25テツクス１本の真鍮線３に、平均長さ
50mmのガラス繊維40重量％と平均長さ50mmの
レーヨンステーブル60重量％から構成される
交絡用混合繊維２を太さ860テツクスになる
ように交絡させたものである。
(3) 実施例試料番号３（第３図）
太さ15テツクスの３本のレーヨンスフ糸１
に平均長さ50mmのガラス繊維60重量％と平均
長さ50mmのカーボン繊維３重量％と平均長さ
25mmのレーヨンステープル37重量％から構成
される交絡用混合繊維２を太さ840テツクス
になるように交絡させたものを３本撚り合わ
せて一体化させた太さ2540テツクスのかさ高
ひもである。
(4) 実施例試料番号４（第４図）
太さ15テツクスの３本のレーヨンスフ糸１
に平均長さ50mmのガラス繊維70重量％と平均
長さ50mmのレーヨンステープル30重量％から
構成される交絡用混合繊維２を太さ840テツ
クスになるよう交絡させたものを３本と太さ
25テツクスの１本の真鍮線３とを撚り合わせ
て一体化させた太さ2565テツクスのかさ高ひ
もである。
(5) 実施例試料番号５（第５図）
太さ15テツクスの３本のレーヨン糸４と太
さ25テツクス１本の銅線５に、平均長さ50mm
のガラス繊維50重量％と平均長さ50のカーボ
ン繊維２重量％と平均長さ25mmのレーヨンス
テープル48重量％から構成される交絡用混合
繊維２を交絡させたものを３本撚り合わせて
一体化させた太さ2600テツクスのかさ高ひも
である。
(6) 実施例試料番号６（第６図）
太さ15テツクスの６本のレーヨンスフ糸１
と太さ25テツクスの１本の真鍮線３に、平均
長さ50mmのガラス繊維70重量％と平均長さ50
mmのカーボン繊維２重量％と平均長さ25mmの
レーヨンステープル28重量％とから構成され
る交絡用混合繊維２を交絡させた太さ900テ
ツクスのひもを４本と太さ50テツクスの真鍮
線３とを撚り合わせて一体化させた太さ3800
テツクスのかさ高ひもである。
(7) 実施例試料番号７（第７図）
太さ15テツクスの３本のレーヨンスフ糸１
と太さ50テツクスの１本の真鍮線３に平均長
さ50mmのガラス繊維80重量％と平均長さ25mm
のレーヨンステープル20重量％とから構成さ
れる交絡用混合繊維２を交絡させた太さ920
テツクスのひもを３本、太さ50テツクスの真
鍮線３の長手方向に巻きつけたひもを５本束
にして燃り合わせにより一体化させた太さ
15000テツクスのかさ高ひもである。
(8) 比較例試料番号１（第８図）
平均長さ25mmのレーヨンステープル15重量
％とアスベスト85重量％から構成されるアス
ベスト・レーヨンステープル混合繊維６を撚
り合わせることにより交絡さた太さ800テツ
クスのひも３本と太さ25テツクスの１本の真
鍮線３とを撚り合わせにより一体化させた太
さ2500テツクスのアスベスト使用かさ高ひも
でもある。
(9) 比較例試料番号２（第９図）
太さ25テツクスの１本の真鍮線３に、平均
長さ25mmのレーヨンステープル15重量％とア
スベスト85重量％とから構成されるアスベス
ト・レーヨンステープル混合繊維６を交絡さ
せた太さ900テツクスのひもを３本束れて撚
り合わせにより一体化させた太さ2800テツク
スのアスベスト使用かさ高ひもである。
(2) クラツチフエーシングの成形法及び特性
前記の各ひも状体試料にメラミン樹脂を含浸
させた後、予備乾燥し、予備乾燥したメラミン
樹脂含浸かさ高加工ひもを渦巻き状に巻き取つ
てドーナツ状に予備成形し、この予備成形物を
250℃のプレス成形型に入れてプレス成形し、
クラツチフエーシング試料を作成した。
このような方法で作成した使用かさ高加工ひも
の異なるそれぞれのクラツチフエーシング試料の
100℃、150℃及び200℃における摩擦係数及び摩
耗率をJIS D4411−1971（自動車用クラツチフエ
ーシング）に従つて測定しその結果を第１表に示
した。さらに、バースト強度（＝回転破壊強度）
を測定し、その結果も第１表に示した。
The present invention relates to a string-like body for friction materials that has extremely excellent properties as a fiber material for friction materials used in automobiles, industrial machines, etc. The inorganic fiber material that has traditionally been widely used as a friction material for clutch facings, brake linings, disk pads, etc. is asbestos fiber, but recently, asbestos fiber resources have decreased and problems with asbestos pollution have arisen, and asbestos There has been an increasing demand for friction materials that do not use fibers. Under these circumstances, studies are currently being actively conducted on the use of other inorganic fibers such as glass fibers as fiber materials for friction materials in place of asbestos fibers, but this has not yet been put into practical use. The current situation is that this is not the case. This is because, compared to asbestos fibers, inorganic fibers other than asbestos fibers, such as glass fibers, are impregnated with thermosetting resin such as phenolic resin, which is used as a binder for these fiber materials, during the production of friction materials. Due to the low retention capacity, manufacturing workability is reduced and it is difficult to obtain high-strength friction materials.Friction materials using the same inorganic fibers as fiber materials other than asbestos fibers have a coefficient of friction that varies depending on the temperature at which they are used. This is because there are many problems that need to be solved, such as a large difference and a decrease in the coefficient of friction at high temperatures. As a result of extensive research in order to solve these problems, the present inventors have found that in a composite yarn consisting of a core material and fibers intertwined with it, rayon fibers with a relatively high resin retention capacity are used as the core material and the fibers intertwined with the core material. By mixing it with the fibers to be intertwined and further twisting if necessary to form a string with a thickness of 50 to 30,000 tex, and impregnating it with a thermosetting resin, it is easy to manufacture and machine. We discovered that an extremely high-quality friction material with high strength and little change in the coefficient of friction due to temperature changes can be obtained.
The present invention has been accomplished. That is, in the present invention, a core material made of a plurality of rayon threads or a rayon thread and a metal wire is intertwined with mixed fibers made of rayon fibers and at least one selected from glass fibers and carbon fibers. Twist this further to make a thickness of 50
The object of the present invention is to provide a string-like body for a friction material, characterized in that it is constructed in the form of a string of ~30,000 tex and is impregnated with a thermosetting resin. As the core material of the string-like body of the present invention, a single rayon thread or a combination of a plurality of rayon threads and metal wires is used. The shape of the rayon thread or metal wire that forms this core material is filament, thread,
It can be made of any material such as thin string or ribbon. These are integrated into a core material by twisting a plurality of them, wrapping one around the other, weaving, or gluing them together. This metal wire includes brass wire, copper wire, zinc wire,
Aluminum wire, iron wire, etc. can be mentioned, but among these metal wires, particularly desirable are brass wire, copper wire, and zinc wire, which are relatively flexible and have good workability in manufacturing bulky strings. . By introducing these metal wires into the string-like body, the burst strength of the string-like body can be improved, and in order to improve thermal conductivity, the heat generated when used as a friction material is absorbed by heat conduction. It has the effect of controlling and prolonging its service life. Next, a mixture of rayon fibers and glass fibers, rayon fibers and carbon fibers, or rayon fibers, glass fibers, and carbon fibers is used as the fiber mixture to be intertwined with the core material.
A particularly desirable fiber mixture is glass fiber, which has an appropriate coefficient of friction and has the effect of increasing mechanical strength.
20 to 90% by weight, 5 to 80% by weight of rayon fiber, which has the effect of improving resin impregnation, improving entangling workability, and maintaining a high coefficient of friction at high temperatures; Carbon fiber is added at a rate of 5% by weight or less, which has been finely adjusted and has the effect of improving thermal conductivity and preventing temperature rise during friction. By using the fiber mixture at this mixing ratio as the intertwined fibers, a bulky string-like body can be efficiently produced, and a particularly high-quality friction material can be obtained. Further, various cutting lengths of the respective fibers constituting the fiber mixture used as the entangled fibers can be used, but it is particularly desirable that the average cutting length be in the range of 1 to 200 mm. In order to entangle this fiber mixture with the core material, the fibers are opened into cotton-like lumps, formed into a thin sheet, cut into a long and thin tape, and entwined around the core material. Either wrap the fiber mixture around the core material and fix it by twisting as necessary, or spread the fiber mixture around the stretched core material, spray it with a glue such as polyvinyl alcohol to adhere it around the core material, and then twist it. to fix it. The bulky yarn thus obtained may be used as it is, or may be twisted into a plurality of yarns to obtain the required thickness. The composite of the core material and the fiber mixture must be formed into a string having a thickness of 50 to 30,000 tex. Text here means length
It is a unit of thickness expressed in grams per 1000m. If the thickness of this string-like body is thinner than 50 tex, the production time will be longer when manufacturing the friction material of the required size, which will worsen the manufacturing workability. , the impregnation time for thermosetting resins such as phenolic resins, urea resins, and melamine resins as binders becomes longer, which not only impairs manufacturing workability but also causes the fiber distribution state of the finished friction material to become coarse. Mechanical strength such as burst strength (number of revolutions at which breakage occurs, unit: rpm) decreases. Next, this string-like body is impregnated with a thermosetting resin such as a phenol resin, a urea resin, or a melamine resin, and then dried. As a result, the string-like body for friction material of the present invention is obtained. This string-like body contains various friction modifiers (polytetrafluoroethylene molybdenum disulfide, graphite, barite, cashew dust, rubber, cork, etc.) and various fillers (mica, etc.) to finely adjust the friction coefficient as desired. , vermiculite carbonate, chromium oxide, aluminum oxide, zirconium oxide, silicon oxide, diatomaceous earth, glass powder, iron oxide, etc.). By containing a filler or the like, a friction material of even higher quality can be obtained. When the string-like body of the present invention is used as a friction material, it can be used as it is, or it can be used in a structure in which a plurality of string-like bodies are further twisted together (see Fig. 5), or in a structure in which a plurality of string-like bodies are further twisted together. It can also be used in a structure in which it is wound around a metal wire (see FIGS. 6 and 7). Examples of methods for manufacturing friction materials such as clutch facings, brake linings, and disk pads using the string-like body for friction materials of the present invention include:
This is a so-called wet manufacturing method in which a thick-walled pipe is formed using the filament winding method, heated and cured, and then the cured pipe is cut into slices of a predetermined thickness to form the friction material. There are manufacturing methods such as a so-called dry manufacturing method in which the predried thermosetting resin-impregnated composite is preformed into a predetermined shape and then placed in a mold and heated and pressed to form a friction material. The friction material string-like body of the present invention can be easily manufactured as a friction material according to the above-described manufacturing method. Next, the present invention will be specifically explained using Examples and Comparative Examples. Embodiment FIGS. 1 to 7 are cross-sectional model views of the friction material string-like bodies of sample numbers 1 to 7 of this embodiment, respectively. FIG. 8 and FIG. 9 are model cross-sectional views of the friction material string-like bodies of sample numbers 1 and 2 of comparative examples, respectively. FIG. 10 is a perspective view of the string-like body shown in FIG. 1. (1) Composition and preparation method of string-like sample. (1) Example sample number 1 (Fig. 1) Three rayon cotton yarns 1 with a thickness of 15 tex
Mixed fibers 2 for interlacing, which are composed of 70% by weight of glass fibers having an average length of 50 mm and 30% by weight of rayon staples having an average length of 50 mm, were interlaced to have a thickness of 840 tex. (2) Example sample number 2 (Figure 2) Three rayon soft threads 1 with a thickness of 15 tex and one brass wire 3 with a thickness of 25 tex have an average length.
Mixed fibers 2 for interlacing, which are composed of 40% by weight of glass fibers of 50 mm and 60% by weight of rayon staples having an average length of 50 mm, are interlaced to have a thickness of 860 tex. (3) Example sample number 3 (Figure 3) Three rayon cotton yarns 1 with a thickness of 15 tex
60% by weight of glass fibers with an average length of 50mm and 3% by weight of carbon fibers with an average length of 50mm and an average length of
This is a bulky string with a thickness of 2540 tex, which is made by twisting and integrating three pieces of interlacing mixed fibers 2 consisting of 37% by weight of 25 mm rayon staples to a thickness of 840 tex. (4) Example sample number 4 (Figure 4) Three rayon cotton yarns 1 with a thickness of 15 tex
Mixed fibers 2 for interlacing consisting of 70% by weight of glass fibers with an average length of 50 mm and 30% by weight of rayon staples with an average length of 50 mm were interlaced to have a thickness of 840 tex.
It is a bulky string with a thickness of 2565 tex made by twisting and integrating a single brass wire 3 with a thickness of 25 tex. (5) Example sample number 5 (Figure 5) Three rayon threads 4 with a thickness of 15 tex and one copper wire 5 with a thickness of 25 tex have an average length of 50 mm.
Three strands of intertwined mixed fiber 2 consisting of 50% by weight of glass fiber, 2% by weight of carbon fiber with an average length of 50mm, and 48% by weight of rayon staple with an average length of 25mm are twisted together and integrated. It is a bulky string with a thickness of 2,600 tex. (6) Example sample number 6 (Figure 6) Six rayon staple yarns 1 with a thickness of 15 tex
and one brass wire 3 with a thickness of 25 tex, 70% by weight of glass fiber with an average length of 50 mm and an average length of 50 mm.
4 strings of 900 tex thick and 50 tex thick brass wire 3 intertwined with interlacing mixed fiber 2 consisting of 2% by weight of carbon fiber of mm and 28% of rayon staple of average length 25 mm Thickness 3800 made by twisting and integrating
It is a bulky string from Tekkusu. (7) Example sample number 7 (Figure 7) Three rayon cotton yarns 1 with a thickness of 15 tex
One brass wire 3 with a thickness of 50 tex and 80% by weight glass fiber with an average length of 50 mm and an average length of 25 mm.
Thickness 920 with interlaced mixed fiber 2 composed of 20% by weight of rayon staple.
Thickness made by bundling five cords made by wrapping three tex strings in the longitudinal direction of 50 tex thick brass wire 3 and combining them by burning them together.
It is a bulky string of 15,000 tex. (8) Comparative Example Sample No. 1 (Fig. 8) Asbestos/rayon staple mixed fiber 6 consisting of 15% by weight of rayon staples and 85% by weight of asbestos with an average length of 25 mm was twisted together to form a fiber with a thickness of 800 mm. It is also a bulky string made of asbestos with a thickness of 2,500 tex, which is made by twisting together three tex strings and one brass wire 3 with a thickness of 25 tex. (9) Comparative Example Sample No. 2 (Figure 9) Asbestos/rayon staple made of 15% by weight of rayon staple with an average length of 25mm and 85% by weight of asbestos on one brass wire 3 with a thickness of 25 tex. This is a bulky string made of asbestos with a thickness of 2800 tex, which is made by bundling three 900 tex strings intertwined with mixed fibers 6 and integrating them by twisting them together. (2) Molding method and characteristics of clutch facing Each of the above string-like samples was impregnated with melamine resin, pre-dried, and the pre-dried melamine resin-impregnated bulky string was wound into a spiral shape to form a donut. This preform is preformed into
Place it in a press mold at 250℃ and press mold it.
A clutch facing sample was prepared. For each clutch facing sample with different bulky strings made using this method,
The friction coefficient and wear rate at 100°C, 150°C and 200°C were measured according to JIS D4411-1971 (automobile clutch facings) and the results are shown in Table 1. Furthermore, burst strength (= rotational breaking strength)
were measured and the results are also shown in Table 1.
【表】【table】
【表】
第１表より本発明のひも状体（試料番号１ない
し７）を用いた試料記号イないしトのクラツチフ
エーシングは、いずれも、アスベストを使用した
比較例の試料記号チ及びリのクラツチフエーシン
グに対して、摩擦係数、摩耗率およびバースト強
度共に同等以上の特性を示し、極めて摩擦材料と
して優れた特性を有することが分る。[Table] From Table 1, the clutch facings of sample codes I to I using the string-like bodies of the present invention (sample numbers 1 to 7) are the same as those of sample codes C and I of comparative examples using asbestos. It can be seen that the friction coefficient, wear rate, and burst strength of this material are equivalent to or better than those of clutch facings, indicating that it has extremely excellent properties as a friction material.
第１図ないし第７図は本発明の摩擦材料用ひも
状体の例を示したモデル断面図、第８図及び第９
図は、従来のアスベストを使用した摩擦材料用ひ
も状体の例を示したモデル断面図、第１０図は第
１図の例の斜視図である。
図中符号１，３，４，５は芯材、２，６は交絡
繊維混合物である。
1 to 7 are cross-sectional views of models showing examples of the string-like body for friction materials of the present invention, and FIGS. 8 and 9
The figure is a sectional view of a model showing an example of a conventional string-like body for friction material using asbestos, and FIG. 10 is a perspective view of the example of FIG. 1. In the figure, numerals 1, 3, 4, and 5 are core materials, and 2 and 6 are intertwined fiber mixtures.
Claims (1)
から成る芯材に、レーヨン繊維と、ガラス繊維及
びカーボン繊維の中から選ばれた少なくとも１種
から成る混合繊維を交絡させ、場合によりさらに
これを燃り合わせて太さ50〜30000テツクスのひ
も状に構成し、熱硬化性樹脂を含浸させたことを
特徴とするる摩擦材料用ひも状体。 ２ 混合繊維が、ガラス繊維20〜90重量％、レー
ヨン繊維５〜80重量％及びカーボン繊維０〜５重
量％から成る特許請求の範囲第１項記載の摩擦材
料用ひも状体。[Scope of Claims] 1 A core material made of a plurality of rayon threads or a rayon thread and a metal wire is intertwined with mixed fibers made of rayon fibers and at least one selected from glass fibers and carbon fibers, A string-like body for a friction material, characterized in that the string-like body is further burned together as the case may be, formed into a string-like body having a thickness of 50 to 30,000 tex, and impregnated with a thermosetting resin. 2. The string-like body for a friction material according to claim 1, wherein the mixed fibers consist of 20 to 90% by weight of glass fibers, 5 to 80% by weight of rayon fibers, and 0 to 5% by weight of carbon fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9949179A JPS59168197A (en) | 1979-08-06 | 1979-08-06 | Bulky processed string for friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9949179A JPS59168197A (en) | 1979-08-06 | 1979-08-06 | Bulky processed string for friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59168197A JPS59168197A (en) | 1984-09-21 |
| JPS6320952B2 true JPS6320952B2 (en) | 1988-05-02 |
Family
ID=14248765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9949179A Granted JPS59168197A (en) | 1979-08-06 | 1979-08-06 | Bulky processed string for friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59168197A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01174044U (en) * | 1988-05-26 | 1989-12-11 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0333285A (en) * | 1989-06-29 | 1991-02-13 | Nippon Steel Corp | Cable-like composite material and production thereof |
| KR100635355B1 (en) | 2003-04-09 | 2006-10-18 | 니혼 이타가라스 가부시키가이샤 | Reinforcing cord for reinforcing rubber and rubber product using the same |
-
1979
- 1979-08-06 JP JP9949179A patent/JPS59168197A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01174044U (en) * | 1988-05-26 | 1989-12-11 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59168197A (en) | 1984-09-21 |
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