JP2664738B2 - Friction material - Google Patents
Friction materialInfo
- Publication number
- JP2664738B2 JP2664738B2 JP24123588A JP24123588A JP2664738B2 JP 2664738 B2 JP2664738 B2 JP 2664738B2 JP 24123588 A JP24123588 A JP 24123588A JP 24123588 A JP24123588 A JP 24123588A JP 2664738 B2 JP2664738 B2 JP 2664738B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- friction
- friction material
- content
- sepiolite
- 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 - Fee Related
Links
- 239000002783 friction material Substances 0.000 title claims description 52
- 229920006231 aramid fiber Polymers 0.000 claims description 32
- 239000004113 Sepiolite Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 25
- 229910052624 sepiolite Inorganic materials 0.000 claims description 25
- 235000019355 sepiolite Nutrition 0.000 claims description 25
- 229920001971 elastomer Polymers 0.000 claims description 19
- 239000005060 rubber Substances 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 16
- 239000011230 binding agent Substances 0.000 claims description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 11
- 239000004760 aramid Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 9
- 239000011347 resin Substances 0.000 claims description 9
- 229920001187 thermosetting polymer Polymers 0.000 claims description 9
- 239000000835 fiber Substances 0.000 description 14
- 239000010425 asbestos Substances 0.000 description 12
- 229910052895 riebeckite Inorganic materials 0.000 description 12
- 239000000843 powder Substances 0.000 description 9
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 8
- 238000001125 extrusion Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- 229920000459 Nitrile rubber Polymers 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000005011 phenolic resin Substances 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004067 bulking agent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229920000271 Kevlar® Polymers 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 229920003049 isoprene rubber Polymers 0.000 description 2
- 239000004761 kevlar Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- UJPKMTDFFUTLGM-UHFFFAOYSA-N 1-aminoethanol Chemical compound CC(N)O UJPKMTDFFUTLGM-UHFFFAOYSA-N 0.000 description 1
- 244000226021 Anacardium occidentale Species 0.000 description 1
- 241000282472 Canis lupus familiaris Species 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000282326 Felis catus Species 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- -1 aldehyde amine amine Chemical class 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
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- DKVNPHBNOWQYFE-UHFFFAOYSA-N carbamodithioic acid Chemical compound NC(S)=S DKVNPHBNOWQYFE-UHFFFAOYSA-N 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 230000013011 mating Effects 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
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000000546 pharmaceutical excipient Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002516 radical scavenger Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000012991 xanthate Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 発明の技術分野 本発明は、クラッチディスクのフリクションワッシ
ャ、洗濯機のブレキシューなどに用いられる緩衝作用を
有する摩擦材に関し、さらに詳しくは、石綿を用いずに
形成された非石綿系の摩擦材に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction material having a buffering effect used for a friction washer of a clutch disk, a brake shoe of a washing machine, and the like. More specifically, the present invention relates to a non-woven material formed without using asbestos. It relates to an asbestos-based friction material.
発明の技術的背景ならにびその問題点 クラッチディスク、洗濯機の回転筒などには、緩衝作
用を持たせるために、摩擦材が用いられている。このよ
うな摩擦材は、高摩擦係数を有するとともに耐摩擦性に
優れ、かつクッション性を有し、しかもたとえば回転筒
に巻きつけても折れないというような柔軟性を有するこ
とが望ましい。このような摩擦材は、従来石綿を基材と
して製造されてきたが、近年に至って石綿資源の枯渇お
よびそれに伴なう入手難の問題が生ずるとともに、石綿
の人体に対する悪影響も指摘され、石綿の使用は再検討
され始めている。Technical background of the invention and its problems Friction materials are used in clutch discs, rotating cylinders of washing machines and the like in order to have a buffering action. It is desirable that such a friction material has a high coefficient of friction, is excellent in friction resistance, has cushioning properties, and has flexibility such that it does not break even when it is wound around a rotary cylinder, for example. Conventionally, such a friction material has been manufactured using asbestos as a base material. However, recently, asbestos resources have been depleted, and there has been a problem of difficulty in obtaining asbestos. In addition, adverse effects of asbestos on the human body have been pointed out. Use is beginning to be reviewed.
このため、本発明者らは、摩擦材を石綿以外の基材繊
維から製造するべき鋭意検討したところ、次のような事
実を見出した。すなわち、石綿の代わりにガラス繊維な
どの剛直な無機繊維を基材として用いて摩擦材を製造し
ようとすると、室温から50℃程度の低温での押出機によ
るシート状物への製造が困難となり、いちいち各摩擦材
を加熱圧縮しなければならず、このため量産性が著しく
低下してコスト上昇を招くともに、クッション性および
柔軟性に優れたものが得られないという問題点が生じて
しまう。一方、石綿の代わりに、アラミド繊維あるいは
フィブリル化したアラミド繊維を基材繊維として用いて
摩擦材を製造する方法も提案されているが、アラミド繊
維は吸湿性が大きく溶剤との相性が悪く、そのためにシ
ート状に押出成形することが困難であり、得られる製品
の軟らかさのバラツキが多いという不都合を有する。For this reason, the present inventors have conducted intensive studies to manufacture the friction material from base fibers other than asbestos, and found the following facts. In other words, when trying to produce a friction material using a rigid inorganic fiber such as glass fiber instead of asbestos as a base material, it becomes difficult to produce a sheet-like material by an extruder at a low temperature of about 50 ° C. from room temperature, Each friction material has to be heated and compressed one by one, so that mass productivity is remarkably reduced and cost is increased, and a problem occurs in that a material excellent in cushioning property and flexibility cannot be obtained. On the other hand, instead of asbestos, a method of producing a friction material using aramid fibers or fibrillated aramid fibers as a base fiber has also been proposed.However, aramid fibers have a large hygroscopic property and are incompatible with a solvent. However, it is difficult to extrude the product into a sheet-like shape, and the resulting product has a large variation in softness.
摩擦材としての製品が軟らか過ぎると、それをたとえ
ばクラッチディスク用フリクションワッシャとして用い
た場合に、回転初期の捩り摩擦係数が小さく、クラッチ
ディスクの振動や騒音の原因となる虞があった。クラッ
チディスクでは、フリクションワッシャは、フリクショ
ンスプリングおよびコーンスプリングと共に、ヒステリ
シストルクを発生させて摩擦減衰の役割を行う。このと
きフリクションワッシャは、相手面になじみよくすべき
であり、回転初期における捩り摩擦係数のアップが必要
である。これがないとクラッチディスクの振動や騒音の
原因となるからである。したがって、フリクションワッ
シャなどに用いられる摩擦材としては、回転初期の捩り
摩擦係数の向上が望まれている。If the product as the friction material is too soft, when it is used, for example, as a friction washer for a clutch disk, the torsional friction coefficient at the beginning of rotation is small, which may cause vibration and noise of the clutch disk. In the clutch disk, the friction washer, together with the friction spring and the cone spring, generates a hysteresis torque and plays a role of friction damping. At this time, the friction washer should be familiar with the mating surface, and it is necessary to increase the torsional friction coefficient at the beginning of rotation. If this is not provided, it causes vibration and noise of the clutch disk. Therefore, as a friction material used for a friction washer or the like, it is desired to improve the torsional friction coefficient at the beginning of rotation.
発明の目的 本発明は、石綿以外の基材繊維を用いて所定の軟らか
さの摩擦材を押出し成形することが容易であり、量産性
に優れ、しかも摺動初期の捩り摩擦係数が大きい摩擦材
を提供することを目的としている。SUMMARY OF THE INVENTION The present invention is directed to a friction material which is easy to extrude a friction material having a predetermined softness using a base fiber other than asbestos, is excellent in mass productivity, and has a large torsional friction coefficient at the beginning of sliding. It is intended to provide.
発明の概要 本発明に係る摩擦材は、セピオライトおよびアラミド
繊維を含む基材と、熱硬化性樹脂およびゴム材を含む結
着組成物と、焼成アルミナを含む摩擦向上剤とから成
り、 前記セピオライトの含有量が10〜30重量％であり、前
記アラミド繊維の含有量が３〜10重量％であり、前記結
着組成物の含有量が20〜40重量％であり、焼成アルミナ
の含有量が５〜15重量％であることを特徴としている。SUMMARY OF THE INVENTION The friction material according to the present invention comprises a base material containing sepiolite and aramid fiber, a binder composition containing a thermosetting resin and a rubber material, and a friction improver containing calcined alumina, The content is 10 to 30% by weight, the content of the aramid fiber is 3 to 10% by weight, the content of the binder composition is 20 to 40% by weight, and the content of the calcined alumina is 5 to 5. ~ 15% by weight.
また本発明に係る摩擦材は、セピオライトおよびアラ
ミド繊維を含む基材と、熱硬化性樹脂およびゴム材を含
む結着組成物と、摩擦向上剤とから成り、 前記セピオライトの含有量が10〜30重量％であり、前
記アラミド繊維の含有量が３〜10重量％であり、前記結
着組成物の含有量が20〜40重量％であり、摩擦向上剤の
含有量が５〜25重量％であることを特徴している。The friction material according to the present invention comprises a base material containing sepiolite and aramid fiber, a binder composition containing a thermosetting resin and a rubber material, and a friction improver, wherein the content of the sepiolite is 10 to 30. % By weight, the content of the aramid fiber is 3 to 10% by weight, the content of the binder composition is 20 to 40% by weight, and the content of the friction improver is 5 to 25% by weight. It is characterized by being.
このような本発明に係る摩擦材によれば、基材繊維と
してセピオライトとアラミド繊維とを用い、それらの含
有量を一定の関係にすることによって、押出し成形時の
加工特性が大幅に改善され、得られる製品の柔軟性が均
一化されると共に、摺動初期の摩擦係数が向上する。こ
のように押出し成形時の加工特性が改善され、摺動初期
の摩擦係数が向上する詳細な理由な判明していないが、
セピオライトが溶剤との相性がよく、押出成形用の材料
の軟らかさが安定化し、押出工程がスムーズになるため
の考えられる。According to such a friction material according to the present invention, by using sepiolite and aramid fibers as the base fibers, and by keeping their contents in a fixed relationship, the processing characteristics at the time of extrusion molding are significantly improved, The flexibility of the obtained product is made uniform, and the friction coefficient at the beginning of sliding is improved. Although the processing characteristics at the time of extrusion molding are improved in this way, the detailed reason why the friction coefficient at the initial stage of sliding is improved is not clear,
It is considered that sepiolite has good compatibility with the solvent, the softness of the material for extrusion molding is stabilized, and the extrusion process becomes smooth.
発明の具体的説明 以下本発明に係る摩擦材について具体的に説明する。Specific description of the invention Hereinafter, the friction material according to the present invention will be specifically described.
本発明に係る摩擦材は、基材繊維として、アラミド繊
維とセピオライトを含ンでいる。アラミド繊維として
は、フィブリル化したアラミド繊維が好ましく用いられ
る。このようなアラミド繊維は、デュポン社よりケブラ
ーあるいはケブラーパルプとして市販されている。The friction material according to the present invention contains aramid fibers and sepiolite as base fibers. As the aramid fiber, a fibrillated aramid fiber is preferably used. Such aramid fibers are commercially available from DuPont as Kevlar or Kevlar pulp.
本発明で基材繊維として上記のようなアラミド繊維と
組合せて用いられるセピオライトとしては、３〜3000μ
好ましくは20〜100μ程度の繊維長を有するものが用い
られる。平均直径が0.01〜20μのものが好ましい。この
セピオライトは、マグネシウムの含水ケイ酸塩系の粘土
鉱物であって、二酸化珪素、酸化マグネシウム、酸化カ
ルシウム、酸化アルミニウム、酸化鉄などからなり、多
少の付着水分を含んでいる。またこのセピオライトは、
いわゆるレンガ積み構造を有しており、大きな吸着性を
有しており、また独特のレオロジー特性ならびに固結性
を有している。Sepiolite used in combination with the aramid fiber as the base fiber in the present invention, 3 ~ 3000μ
Preferably, a fiber having a fiber length of about 20 to 100 μm is used. Those having an average diameter of 0.01 to 20μ are preferred. This sepiolite is a hydrated silicate clay mineral of magnesium, and is composed of silicon dioxide, magnesium oxide, calcium oxide, aluminum oxide, iron oxide and the like, and contains some attached moisture. Also, this sepiolite is
It has a so-called brickwork structure, has a large adsorptivity, and has unique rheological properties and consolidation.
このようなセピオライトは、従来その吸着性などを利
用して、油の脱色精製などにモンモリロナイトと同様に
用いられたり、あるいは犬、猫などのペット用の敷砂、
農薬の賦形剤などに用いられてきているが、摩擦材の基
材繊維としてアラミド繊維と組合せて用いられたことは
なかった。Such sepiolite is conventionally used in the same manner as montmorillonite for decolorization and refining of oil, etc., utilizing its adsorptivity, etc., or for pets such as dogs and cats,
Although it has been used as an excipient for agricultural chemicals, it has never been used in combination with aramid fiber as a base fiber of a friction material.
摩擦材の基材繊維を構成するアラミド繊維およびセピ
オライトの含有量を次に示す。The contents of aramid fiber and sepiolite constituting the base fiber of the friction material are shown below.
本発明では、アラミド繊維については、摩擦材の全重
量に対して３〜10重量％、好ましくは３〜５重量％の割
合で摩擦材中に含まれる。セピオライトについては、摩
擦材の全重量に対して10〜30重量％、好ましくは15〜20
重量％の割合で摩擦材中に含まれる。In the present invention, the aramid fiber is contained in the friction material at a ratio of 3 to 10% by weight, preferably 3 to 5% by weight based on the total weight of the friction material. For sepiolite, 10 to 30% by weight based on the total weight of the friction material, preferably 15 to 20%
It is contained in the friction material in a proportion of% by weight.
基材繊維としてアラミド繊維を単独で用いると、押出
成形時の加工性が悪いと共に、得られる製品が柔軟にな
り過ぎて摺動初期の摩擦係数が小さくなる。When the aramid fiber is used alone as the base fiber, the processability at the time of extrusion molding is poor, and the obtained product becomes too flexible, and the friction coefficient at the initial stage of sliding decreases.
そこで、本発明では、アラミド繊維の量を少量にし、
セピオライトを多量に混入することによって、適度の柔
軟性と、摺動初期の摩擦係数の向上を図っている。この
ような効果が期待できることは、本発明者によって初め
て発見された。Therefore, in the present invention, the amount of aramid fiber is reduced,
By mixing a large amount of sepiolite, appropriate flexibility and an improvement in the coefficient of friction at the beginning of sliding are achieved. The present inventors have discovered that such an effect can be expected for the first time.
なお、セピオライトを30重量％以上摩擦中に含ませる
と、シート状に押出成形することが困難になり、シート
に割れが生じ好ましくなく、10重量％以下であると、摺
動初期の摩擦係数の向上が期待できないことから好まし
くない。また、アラミド繊維を10重量％以上混入する
と、得られる製品の柔軟性が大きくなるが、研磨時に変
形が生じたり、摺動初期の摩擦係数が小さいため好まし
くない。また、アラミド繊維３重量％以下では、このア
ラミド繊維が結着組成物と共に各組成のつなぎの役割も
果していることから、シート状の押出成形が困難になる
ことから好ましくない。If sepiolite is included in the friction in an amount of 30% by weight or more, it becomes difficult to extrude the sheet into a sheet, and the sheet is undesirably cracked. It is not preferable because no improvement can be expected. Further, when the aramid fiber is mixed in an amount of 10% by weight or more, the flexibility of the obtained product is increased, but it is not preferable because deformation occurs during polishing and the friction coefficient at the initial stage of sliding is small. Further, when the aramid fiber is 3% by weight or less, the aramid fiber also plays a role of connecting the components together with the binder composition, so that it is difficult to extrude the sheet, which is not preferable.
本発明では、このようなアラミド繊維およびセピオラ
イトから成る基材に、熱硬化性樹脂およびゴム材からな
る結着組成物が付着される。熱硬化性樹脂としては、具
体的にはフェノール樹脂、尿素樹脂、メラミン樹脂、エ
ポキシ樹脂などが用いられる。これらのうち、フェノー
ル樹脂が好ましく、フェノール樹脂としては、ノボラッ
ク型、レゾール型、あるいはクレゾール変性、メラミン
変性、ゴム変性、カシー変性などの変化フェノール樹脂
が用いられる。In the present invention, a binder composition comprising a thermosetting resin and a rubber material is adhered to a substrate comprising such aramid fibers and sepiolite. Specific examples of the thermosetting resin include a phenol resin, a urea resin, a melamine resin, and an epoxy resin. Of these, phenolic resins are preferred, and as phenolic resins, novolak-type, resol-type, or modified phenolic resins such as cresol-modified, melamine-modified, rubber-modified, and Cassie-modified are used.
このような熱硬化性樹脂の含有量は、摩擦材の全重量
に対して５〜20重量％、好ましくは10〜13重量％であ
る。The content of such a thermosetting resin is 5 to 20% by weight, preferably 10 to 13% by weight, based on the total weight of the friction material.
ゴム材としては、ブタジエンゴム（BR）、スチレン−
ブタジエンゴム（SBR）、イソプレンゴム（IR）、エチ
レン−プロピレンゴム（EPM）、ブチルコム（IIR）、ク
ロロプレンゴム（CR）、アクリロニトリル−ブタジエン
ゴム（NBR）、クロルスルホン化ポリエチレン（CSM）、
アクリルゴム（ACM）、ウレタンゴム（Ｕ）、シリコー
ンゴム（Si）、フッ素ゴム（FPM）、多硫化ゴム
（Ｔ）、ポリエーテルゴム（POR）などの合成ゴムなら
びに天然ゴムが用いられうるが、特にスチレン−ブラジ
エンゴム（SBR）、アクリロニトリル−ブタジエンゴム
（NBR）が好ましい。Butadiene rubber (BR), styrene-
Butadiene rubber (SBR), isoprene rubber (IR), ethylene-propylene rubber (EPM), butylcomb (IIR), chloroprene rubber (CR), acrylonitrile-butadiene rubber (NBR), chlorosulfonated polyethylene (CSM),
Synthetic rubber such as acrylic rubber (ACM), urethane rubber (U), silicone rubber (Si), fluoro rubber (FPM), polysulfide rubber (T), polyether rubber (POR) and natural rubber can be used. Particularly, styrene-bradiene rubber (SBR) and acrylonitrile-butadiene rubber (NBR) are preferable.
また、ゴム材中に用いられる加硫剤としては、イオ
ウ、酸化亜鉛、酸化マグネシウム、有機過酸化物などが
用いられる。また加硫促進剤としては、チアゾール系促
進剤、スルフェンアミド系促進剤、ジチオカルバメート
系促進剤、アルデヒドアミンン系促進剤、グアニジン系
促進剤、チオ尿素促進剤、キサンテート系促進剤チラウ
ム系促進剤、アルデヒドアンモニア系促進剤などが用い
られる。Further, as the vulcanizing agent used in the rubber material, sulfur, zinc oxide, magnesium oxide, organic peroxide and the like are used. Examples of the vulcanization accelerator include a thiazole accelerator, a sulfenamide accelerator, a dithiocarbamate accelerator, an aldehyde amine amine accelerator, a guanidine accelerator, a thiourea accelerator, a xanthate accelerator and a tyrium accelerator. Agents, aldehyde ammonia-based accelerators and the like are used.
ゴム材の含有量は摩擦材の全重量に対して10〜25重量
％、好ましくは13〜20重量％である。また、熱硬化性樹
脂およびゴム材を含む結着組成物の含有量は摩擦材の全
重量に対して20〜40重量％、好ましくは22〜30重量％で
ある。The content of the rubber material is 10 to 25% by weight, preferably 13 to 20% by weight based on the total weight of the friction material. The content of the binder composition containing the thermosetting resin and the rubber material is 20 to 40% by weight, preferably 22 to 30% by weight based on the total weight of the friction material.
本発明では、摩擦材中に摩擦向上剤（摩擦調整剤とし
ての意味も含む）として、焼成アルミナ粉末が適宜含ま
れる。このような焼成アルミナ粉末は、１〜５μｍ好ま
しくは１〜２μｍ程度の大きさを有することが好まし
い。５μｍ以上の大きさの焼成アルミナ粉末を用いる
と、摩擦性能上、相手攻撃性が著しく好ましくない。ま
た、摩擦材成形用組成物を押出機にて押出し成形する際
に、押出機スクリューが傷つきやすくなるため好ましく
ない。In the present invention, a calcined alumina powder is appropriately contained as a friction improver (including the meaning as a friction modifier) in the friction material. Such a calcined alumina powder preferably has a size of about 1 to 5 μm, preferably about 1 to 2 μm. When the calcined alumina powder having a size of 5 μm or more is used, the aggressiveness of the partner is remarkably unfavorable in terms of friction performance. In addition, when the composition for forming a friction material is extruded by an extruder, the extruder screw is easily damaged, which is not preferable.
焼成アルミナ粉末を、摩擦材中に含有せしめることに
よって、高温条件下で摩擦材を使用しても摩擦係数はほ
とんど低下しなくなり、優れた摩擦特性を有する摩擦材
が得られる。By incorporating the calcined alumina powder in the friction material, the friction coefficient hardly decreases even when the friction material is used under high temperature conditions, and a friction material having excellent friction characteristics can be obtained.
焼成アルミナを摩擦材中に含有させる場合には、その
含有量は、５〜15重量％、好ましくは７〜10である。When calcined alumina is contained in the friction material, the content is 5 to 15% by weight, preferably 7 to 10%.
本発明では、摩擦材中に焼成アルミナを含ませない場
合には、摩擦向上剤として、クレー、グラファイト、カ
シューダスト、硫酸バリウムなどの通常の摩擦向上剤を
摩擦材中に含ませてもよい。その場合の摩擦向上剤の含
有量は、５〜25重量％、好ましくは15〜20重量％であ
る。In the present invention, when calcined alumina is not contained in the friction material, a usual friction improver such as clay, graphite, cashew dust, barium sulfate and the like may be contained in the friction material as a friction improver. In that case, the content of the friction improver is 5 to 25% by weight, preferably 15 to 20% by weight.
また、本発明に係る摩擦材は、増量剤および増粘剤な
どの充填剤を含んでいてもよく、このような増量剤およ
び増粘剤などの充填剤としては、ベントナイト、有機変
性ベントナイト、微粒子シリカ、カルボキシメチルセル
ロース、重炭酸ナトリウム、雲母、酸化ケイ素、金属粉
などが挙げられる。Further, the friction material according to the present invention may include a filler such as a bulking agent and a thickening agent. Examples of the bulking agent such as a bulking agent and a thickening agent include bentonite, organically modified bentonite, and fine particles. Silica, carboxymethylcellulose, sodium bicarbonate, mica, silicon oxide, metal powder and the like can be mentioned.
摩擦材には充填剤として通常金属粉が混入され、この
金属粉の混入によって相手部材に付着したゴミ等をかき
取るスカベンジャー効果と、摩擦熱等を放出する熱放散
効果とが摩擦材に付与される。このような金属粉として
は、Al、Cu、Znなどが例示され、このうちAlが特に好ま
しい。Generally, metal powder is mixed into the friction material as a filler, and the mixing of the metal powder gives the friction material a scavenger effect of scraping dust and the like adhered to a partner member and a heat dissipation effect of releasing frictional heat and the like. You. Examples of such a metal powder include Al, Cu, Zn and the like, of which Al is particularly preferred.
充填剤の含有量は、摩擦材の全重量に対して、10〜30
重量％、好ましくは13〜20である。The content of the filler is 10 to 30 with respect to the total weight of the friction material.
% By weight, preferably 13-20.
次に、本発明に係る摩擦材の製造方法について説明す
るが、基本的には石綿製摩擦材の製造方法と同様であっ
て、基材繊維としての石綿をセピオライトおよびアラミ
ド繊維に代えればよい。すなわち、結着材（ゴムコンパ
ウンド、熱硬化性樹脂）を溶剤に溶解し、ゴム糊とす
る。別に基材繊維（セピオライト、アラミド繊維）、摩
擦向上剤、充填剤、金属粉の混合物を作り、この混合物
をゴム糊中に入れ、混練して摩擦材の材料を調製する。
この材料を押出し機でシート状に押し出す（たとえば、
シートの幅は80〜130mmであり、長さは720mmであり、厚
さは１〜3.5mmである。）。ついでこのシートを乾燥
（たとえば40〜50℃、48時間）し、加硫成形を行なう
（たとえば170〜190℃の温度で30〜60kg f/cm2のプレス
成形）。さらに表裏を研磨し、所定の形状寸法に打抜き
または切断などして仕上げれば、摩擦材が得られる。Next, a method for producing a friction material according to the present invention will be described. The method is basically the same as the method for producing an asbestos friction material, except that asbestos as a base fiber is replaced with sepiolite and aramid fiber. That is, a binder (rubber compound, thermosetting resin) is dissolved in a solvent to obtain a rubber paste. Separately, a mixture of a base fiber (sepiolite, aramid fiber), a friction improver, a filler, and a metal powder is prepared, and the mixture is put into a rubber paste and kneaded to prepare a material for a friction material.
This material is extruded into a sheet with an extruder (for example,
The width of the sheet is 80-130 mm, the length is 720 mm and the thickness is 1-3.5 mm. ). Then, the sheet is dried (for example, at 40 to 50 ° C. for 48 hours) and vulcanized (for example, press molding at a temperature of 170 to 190 ° C. and 30 to 60 kg f / cm 2 ). Further, if the front and back surfaces are polished and finished by punching or cutting into a predetermined shape and size, a friction material can be obtained.
発明の効果 本発明に係る摩擦材では、機材繊維としてセピオライ
トとアラミド繊維とを用い、それらの含有量を一定の関
係にすることによって、押出し成形時の加工特性が大幅
に改善され、得られる製品の柔軟性が均一化されると共
に、摺動初期の摩擦係数が向上する。Effect of the Invention In the friction material according to the present invention, by using sepiolite and aramid fibers as the machine material fibers and by keeping their contents in a fixed relationship, the processing characteristics at the time of extrusion molding are greatly improved, and the obtained product And the coefficient of friction at the beginning of sliding is improved.
以下、本発明を実施例により説明するが、本発明はこ
れら実施例に限定されるものではない。Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.
実施例１ ゴム製品を含むNBRからなるゴム材20重量％と、フェ
ノール樹脂からなる熱可塑性樹脂15重量％とをアセトン
からなる溶剤に溶解し、ゴム糊とした。溶剤は全重量に
対して25重量％とした。別に、セピオライト20重量％
と、アラミド繊維５重量％と、硫酸バリウムおよびグラ
ファイト20重量％と、重炭酸ナトリウムおよびアルミニ
ウム粉末からなる充填剤20重量％との混合物を作り、こ
の混合物を前記ゴム糊中に入れ、混練して摩擦材の材料
を調製した。Example 1 20% by weight of a rubber material composed of NBR containing a rubber product and 15% by weight of a thermoplastic resin composed of a phenol resin were dissolved in a solvent composed of acetone to prepare a rubber paste. The solvent was 25% by weight based on the total weight. Separately, sepiolite 20% by weight
And a mixture of 5% by weight of aramid fiber, 20% by weight of barium sulfate and graphite, and 20% by weight of a filler composed of sodium bicarbonate and aluminum powder, and the mixture is put into the rubber paste and kneaded. Materials for the friction material were prepared.
この材料を押出機でシート状に押し出した。ついで、
このシートを45℃の温度で48時間乾燥し、その後170℃
の温度および40kg f/cm2の圧力で加硫成形した。さら
に、得られた成形品の表裏面を研磨し、所定の形状寸法
に切断して摩擦材を得た。This material was extruded into a sheet by an extruder. Then
The sheet is dried at a temperature of 45 ° C. for 48 hours and then at 170 ° C.
At a temperature of 40 kgf / cm 2 and a pressure of 40 kg f / cm 2 . Further, the front and back surfaces of the obtained molded product were polished and cut into a predetermined shape and size to obtain a friction material.
実施例２ 硫酸バリウムおよびグラファイトの含有量を10重量％
にすると共に、焼成アルミナ10重量％新たに含有される
以外は実施例１と同様にして摩擦材を得た。Example 2 The content of barium sulfate and graphite was 10% by weight.
And a friction material was obtained in the same manner as in Example 1 except that 10% by weight of calcined alumina was newly contained.
比較例１ セピオライト５重量％、アラミド繊維20重量％とする
以外は、実施例２と同様にして摩擦材を得た。Comparative Example 1 A friction material was obtained in the same manner as in Example 2, except that 5% by weight of sepiolite and 20% by weight of aramid fiber were used.
比較例２ セピオライトを含有させないで、アラミド繊維を20重
量％、熱可塑性樹脂10重量％、ゴム材15重量％、硫酸バ
リウムおよびグラファイト40重量％、充填剤15重量％と
した以外は、実施例１と同様にして摩擦材を得た。Comparative Example 2 Example 1 was repeated except that sepiolite was not used, but the aramid fiber was 20% by weight, the thermoplastic resin was 10% by weight, the rubber material was 15% by weight, barium sulfate and graphite were 40% by weight, and the filler was 15% by weight. A friction material was obtained in the same manner as described above.
試験結果 実施例1,2および比較例1,2に係る摩擦材を、自動車規
格JASO C 105−74（クラッチ台上性能試験方法）の「ね
じり耐久試験」のねじり耐久試験機で試験した。Test Results The friction materials according to Examples 1 and 2 and Comparative Examples 1 and 2 were tested with a torsion durability tester of the “torsion durability test” of the automotive standard JASO C 105-74 (test method for performance on a clutch base).
試験条件は次の通りである。 The test conditions are as follows.
試料方法 外径55mm×内径35mm×厚さ1.5mm 捩り角度 ±６゜ 捩り回数 470回／分 温度 常温 荷重 60kg f 試験回数 200×104回 摩擦係数は試験回数におけるトルク値を測定し、トル
ク値から摩擦係数を算出する。Sample method Outer diameter 55 mm × inner diameter 35 mm × thickness 1.5 mm Torsion angle ± 6 ° Number of twists 470 times / min Temperature Room temperature Load 60 kg f Number of tests 200 × 10 4 times The friction coefficient is calculated from
この試験の結果を第１図に示す。 FIG. 1 shows the results of this test.
実施例は、比較例よりも初期の段階で所定の摩擦係数
になり、また初期の摩擦係数が高いことが確認された。It was confirmed that the example had a predetermined friction coefficient at an earlier stage than the comparative example, and had a higher initial friction coefficient.
第１図は本発明の作用を示すグラフである。 FIG. 1 is a graph showing the operation of the present invention.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０８Ｌ 21/00 ＬＢＢ Ｃ０８Ｌ 21/00 ＬＢＢ 77/00 ＬＱＴ 77/00 ＬＱＴ Ｃ０９Ｋ 3/14 Ｃ０９Ｋ 3/14 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location C08L 21/00 LBB C08L 21/00 LBB 77/00 LQT 77/00 LQT C09K 3/14 C09K 3 / 14
Claims (2)
材と、熱硬化性樹脂およびゴム材を含む結着組成物と、
焼成アルミナを含む摩擦向上剤とから成り、 前記セピオライトの含有量が10〜30重量％であり、前記
アラミド繊維の含有量が３〜10重量％であり、前記結着
組成物の含有量が20〜40重量％であり、焼成アルミナの
含有量が５〜15重量％であることを特徴とする摩擦材。1. A base material containing sepiolite and aramid fibers, a binder composition containing a thermosetting resin and a rubber material,
A friction improver containing calcined alumina, wherein the content of the sepiolite is 10 to 30% by weight, the content of the aramid fiber is 3 to 10% by weight, and the content of the binder composition is 20%. A friction material, wherein the content of the calcined alumina is 5 to 15% by weight.
材と、熱硬化性樹脂およびゴム材を含む結着組成物と、
摩擦向上剤とから成り、 前記セピオライトの含有量が10〜30重量％であり、前記
アラミド繊維の含有量が３〜10重量％であり、前記結着
組成物の含有量が20〜40重量％であり、摩擦向上剤の含
有量が５〜25重量％であることを特徴とする摩擦材。2. A base material containing sepiolite and aramid fibers, a binder composition containing a thermosetting resin and a rubber material,
The content of the sepiolite is 10 to 30% by weight, the content of the aramid fiber is 3 to 10% by weight, and the content of the binder composition is 20 to 40% by weight. Wherein the content of the friction improver is 5 to 25% by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24123588A JP2664738B2 (en) | 1988-09-27 | 1988-09-27 | Friction material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24123588A JP2664738B2 (en) | 1988-09-27 | 1988-09-27 | Friction material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0288678A JPH0288678A (en) | 1990-03-28 |
| JP2664738B2 true JP2664738B2 (en) | 1997-10-22 |
Family
ID=17071213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24123588A Expired - Fee Related JP2664738B2 (en) | 1988-09-27 | 1988-09-27 | Friction material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2664738B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2811574B2 (en) * | 1988-11-11 | 1998-10-15 | 日清紡績株式会社 | Friction material |
| EP0394608A3 (en) * | 1989-04-27 | 1991-05-22 | Rütgerswerke Aktiengesellschaft | Friction material |
| JPH108037A (en) * | 1996-06-27 | 1998-01-13 | Akebono Brake Ind Co Ltd | Non-asbestos-based friction material |
| JP2001107027A (en) * | 1999-10-12 | 2001-04-17 | Hitachi Chem Co Ltd | Friction material composition and friction material using this |
| WO2013046551A1 (en) * | 2011-09-28 | 2013-04-04 | 住友ベークライト株式会社 | Molding material |
| JP2014025014A (en) * | 2012-07-28 | 2014-02-06 | Nisshinbo Brake Inc | Friction material |
| CN104151638B (en) * | 2014-07-29 | 2016-06-22 | 辽宁红德电碳制品有限公司 | A kind of room temperature compacting high-power locomotive composite brake shoe and preparation method thereof |
| DE102015223898A1 (en) | 2015-12-01 | 2017-06-01 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Back pressure flap device, method for producing the dynamic pressure flap device and fan with ram pressure flap device |
| DE102015223893A1 (en) * | 2015-12-01 | 2017-06-01 | Schaeffler Technologies AG & Co. KG | Wet running friction lining |
-
1988
- 1988-09-27 JP JP24123588A patent/JP2664738B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0288678A (en) | 1990-03-28 |
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