JP2014148666A - Friction material - Google Patents
Friction material Download PDFInfo
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- JP2014148666A JP2014148666A JP2013268822A JP2013268822A JP2014148666A JP 2014148666 A JP2014148666 A JP 2014148666A JP 2013268822 A JP2013268822 A JP 2013268822A JP 2013268822 A JP2013268822 A JP 2013268822A JP 2014148666 A JP2014148666 A JP 2014148666A
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- 239000002783 friction material Substances 0.000 title claims abstract description 116
- 239000000203 mixture Substances 0.000 claims abstract description 71
- 239000000835 fiber Substances 0.000 claims abstract description 48
- 239000000463 material Substances 0.000 claims abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000010949 copper Substances 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 28
- 239000000314 lubricant Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 7
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052976 metal sulfide Inorganic materials 0.000 claims abstract description 7
- 239000003607 modifier Substances 0.000 claims description 24
- 239000002923 metal particle Substances 0.000 claims description 5
- 239000010445 mica Substances 0.000 claims description 4
- 229910052618 mica group Inorganic materials 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000010979 pH adjustment Methods 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 239000005011 phenolic resin Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005469 granulation Methods 0.000 description 3
- 230000003179 granulation Effects 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000800 acrylic rubber Polymers 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- -1 aralkyl modified phenol Chemical class 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 244000226021 Anacardium occidentale Species 0.000 description 1
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 235000019492 Cashew oil Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- 229910001128 Sn alloy Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 235000020226 cashew nut Nutrition 0.000 description 1
- 229940059459 cashew oil Drugs 0.000 description 1
- 239000010467 cashew oil Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- OBTSLRFPKIKXSZ-UHFFFAOYSA-N lithium potassium Chemical compound [Li].[K] OBTSLRFPKIKXSZ-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- SWHAQEYMVUEVNF-UHFFFAOYSA-N magnesium potassium Chemical compound [Mg].[K] SWHAQEYMVUEVNF-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 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
- 239000002006 petroleum coke Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 238000011417 postcuring Methods 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical compound [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 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
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- 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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
- F16D2200/0065—Inorganic, e.g. non-asbestos mineral fibres
-
- 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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/006—Materials; Production methods therefor containing fibres or particles
- F16D2200/0073—Materials; Production methods therefor containing fibres or particles having lubricating properties
-
- 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
- F16D2200/00—Materials; Production methods therefor
- F16D2200/0082—Production methods therefor
- F16D2200/0086—Moulding materials together by application of heat and pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
Description
本発明は、ディスクブレーキパッドに使用される、ＮＡＯ（Non-Asbestos-Organic）材の摩擦材組成物を成型した摩擦材に関する。 The present invention relates to a friction material obtained by molding a friction material composition of NAO (Non-Asbestos-Organic) material used for a disc brake pad.
従来、乗用車の制動装置としてディスクブレーキが使用されており、その摩擦部材として鋼鉄等の金属製、又は樹脂製のベース部材に摩擦材が貼り付けられたディスクブレーキパッドが使用されている。 Conventionally, a disc brake is used as a braking device for a passenger car, and a disc brake pad in which a friction material is attached to a base member made of metal such as steel or resin is used as the friction member.
摩擦材は、繊維基材としてスチール繊維を摩擦材組成物全量に対し３０重量％以上６０重量％未満含有するセミメタリック摩擦材と、繊維基材の一部にスチール繊維を含み、且つ、スチール繊維を摩擦材組成物全量に対し３０重量％未満含有するロースチール摩擦材と、繊維基材としてスチール繊維やステンレス繊維等のスチール系繊維を含まないＮＡＯ材に分類されている。 The friction material includes a semi-metallic friction material containing 30% by weight or more and less than 60% by weight of steel fiber as a fiber base material, and steel fiber in a part of the fiber base material. Are classified into a low steel friction material containing less than 30% by weight with respect to the total amount of the friction material composition, and a NAO material that does not include steel fibers such as steel fibers and stainless fibers as a fiber base material.
ブレーキノイズの発生が少ない摩擦材が求められている近年においては、スチール系繊維を含まず、且つ、熱硬化性樹脂等の結合材、非鉄金属繊維、有機繊維などの繊維基材、潤滑材、無機摩擦調整材、有機摩擦調整材等の摩擦調整材から成る、ＮＡＯ材の摩擦材を使用したディスクブレーキパッドが広く使用されるようになってきている。 In recent years, there is a demand for friction materials that generate less brake noise.In addition, steel-based fibers are not included, and binders such as thermosetting resins, non-ferrous metal fibers, fiber base materials such as organic fibers, lubricants, Disc brake pads using a friction material such as an inorganic friction adjustment material, an organic friction adjustment material, or the like and using a friction material of NAO material have been widely used.
ディスクブレーキパッドに使用されるＮＡＯ材の摩擦材には、厳しい要求性能を満足するために銅や銅合金の繊維、又は粒子等の銅成分が必須成分として摩擦材組成物全量に対し、５．０〜２０．０重量％程度添加されている。 In the friction material of NAO material used for a disc brake pad, copper components such as copper or copper alloy fibers or particles are essential components in order to satisfy strict required performance. About 0 to 20.0% by weight is added.
しかし近年、このような摩擦材は制動時に摩耗粉として銅を排出し、この排出された銅が河川、湖、海洋に流入することにより水域を汚染する可能性があることが示唆されている。 However, in recent years, it has been suggested that such friction materials discharge copper as wear powder during braking, and the discharged copper may contaminate the water area by flowing into rivers, lakes, and oceans.
このような背景から、アメリカのカリフォルニア州では、２０２１年以降、銅成分を５．０重量％以上含有する摩擦材を使用した摩擦部材の販売及び新車への組み付けを禁止し、２０２３年以降、銅成分を０．５重量％以上含有する摩擦材を使用した摩擦部材の販売及び新車への組み付けを禁止する法案が可決している。 Against this backdrop, California in the United States has banned the sale of friction materials using friction materials containing 5.0% by weight or more of copper components and assembly into new cars since 2021. There is a bill that prohibits the sale of friction members that use friction materials containing more than 0.5% by weight of components and their assembly into new cars.
そして、今後このような規制は世界中に波及するものと予想されることから、ＮＡＯ材の摩擦材に含まれる銅成分を削減することが急務となっている。 Since such regulations are expected to spread all over the world in the future, there is an urgent need to reduce the copper component contained in the friction material of the NAO material.
銅や銅合金の繊維、又は粒子等の銅成分が持つ摩擦メカニズム、熱伝導性等の特性はディスクブレーキパッドに使用される摩擦材には欠かせないものであり、ＮＡＯ材の摩擦材に含まれる銅成分を削減することにより、これまでになかった様々な問題、例えば高速・高負荷時での摩擦係数の安定性、耐フェード性、耐摩耗性が低下するという問題が生じることが明らかとなってきた。 Friction mechanism and thermal conductivity characteristics of copper components such as copper and copper alloy fibers or particles are indispensable for friction materials used in disc brake pads, and are included in NAO friction materials. It is clear that the reduction of the copper component generated causes various problems that have not existed before, for example, the friction coefficient stability at high speed and high load, fade resistance, and wear resistance are reduced. It has become.
特許文献１には、金属スズ又はスズ合金を摩擦材組成物全量に対し０．５〜５０．０重量％と、銅を摩擦材組成物全量に対し０．００１〜４．９９９重量％含有する摩擦材組成物を成型してなる摩擦材が記載されている。 Patent Document 1 contains 0.5 to 50.0% by weight of metal tin or tin alloy with respect to the total amount of the friction material composition and 0.001 to 4.999% by weight of copper with respect to the total amount of the friction material composition. A friction material formed by molding a friction material composition is described.
しかし、特許文献１に記載の摩擦材は銅成分の含有量が５．０重量％未満であるという点で上記の法規を満足しているが、高速・高負荷時での摩擦係数の安定性、耐フェード性、耐摩耗性の要求性能を十分に確保しているとは言えない。 However, the friction material described in Patent Document 1 satisfies the above-mentioned regulations in that the content of the copper component is less than 5.0% by weight, but the stability of the friction coefficient at high speed and high load. It cannot be said that the required performance of fade resistance and wear resistance is sufficiently secured.
本発明は、ディスクブレーキパッドに使用される、ＮＡＯ材の摩擦材組成物を成型した摩擦材において、銅成分の含有量に関する法規を満足しながら、高速・高負荷時での摩擦係数の安定性、耐フェード性、耐摩耗性の要求性能を確保できる摩擦材を提供することを目的とする。 The present invention relates to a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad, while satisfying the regulations concerning the content of copper components, and the stability of the friction coefficient at high speed and high load. An object of the present invention is to provide a friction material capable of ensuring the required performance of fade resistance and wear resistance.
本発明者らは、鋭意検討を重ねた結果、ディスクブレーキパッドに使用される、ＮＡＯ材の摩擦材組成物を成型した摩擦材において、金属繊維として銅繊維及び／又は銅合金繊維と、金属粒子としてスズ粒子と、結合材と、有機繊維と、潤滑材として金属硫化物系潤滑材、炭素質系潤滑材と、チタン酸塩と、無機摩擦調整材としてモース硬度が４．５以上の無機摩擦調整材、モース硬度が４．５未満の無機摩擦調整材と、有機摩擦調整材と、ｐH調整材を特定量含有し、金属繊維に含まれる銅成分の総量が摩擦材組成物全量に対し５．０重量％未満である摩擦材組成物を使用することにより上記課題を解決できることを知見し、本発明を完成した。 As a result of intensive studies, the inventors of the present invention have used a friction material obtained by molding a friction material composition of NAO material, which is used for a disc brake pad, with copper fibers and / or copper alloy fibers as metal fibers, and metal particles. As tin particles, binder, organic fiber, lubricant as metal sulfide lubricant, carbonaceous lubricant, titanate, and inorganic friction with Mohs hardness of 4.5 or more as inorganic friction modifier Adjusting material, inorganic friction adjusting material having a Mohs hardness of less than 4.5, organic friction adjusting material, and pH adjusting material are contained in specific amounts, and the total amount of copper components contained in the metal fiber is 5 with respect to the total amount of the friction material composition It was found that the above problem can be solved by using a friction material composition of less than 0.0% by weight, and the present invention has been completed.
本発明は、ディスクブレーキパッドに使用される、ＮＡＯ材の摩擦材組成物を成型した摩擦材であって、以下の技術を基礎とするものである。 The present invention is a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad, and is based on the following technique.
（１）ディスクブレーキパッドに使用される、摩擦材組成物を成型した摩擦材において、前記摩擦材組成物は、金属繊維として銅繊維及び／又は銅合金繊維を摩擦材組成物全量に対して２．０〜６．０重量％、金属粒子としてスズ粒子を摩擦材組成物全量に対して１．０〜５．０重量％、結合材を摩擦材組成物全量に対して５．０〜１０．０重量％、有機繊維を摩擦材組成物全量に対して２．０〜６．０重量％、潤滑材として金属硫化物系潤滑材を摩擦材組成物全量に対して０．５〜７．０重量％、炭素質系潤滑材を摩擦材組成物全量に対して４．０〜５．０重量％、チタン酸塩を摩擦材組成物全量に対して７．０〜２２．０重量％、無機摩擦調整材としてモース硬度が４．５以上の無機摩擦調整材を摩擦材組成物全量に対して１９．０〜２４．０重量％、モース硬度が４．５未満の無機摩擦調整材を摩擦材組成物全量に対して１０．０〜１６．０重量％、有機摩擦調整材を摩擦材組成物全量に対して３．０〜７．０重量％、ｐH調整材を摩擦材組成物全量に対して２．０〜３．０重量％を含有し、金属繊維に含まれる銅成分の総量が摩擦材組成物全量に対して５．０重量％未満であることを特徴とする摩擦材。 (1) In the friction material obtained by molding the friction material composition used for the disc brake pad, the friction material composition may include copper fibers and / or copper alloy fibers as metal fibers with respect to the total amount of the friction material composition. 0.0 to 6.0 wt%, tin particles as metal particles in an amount of 1.0 to 5.0 wt% with respect to the total amount of the friction material composition, and binder as 5.0 to 10 to 0.1 wt% with respect to the total amount of the friction material composition. 0% by weight, 2.0 to 6.0% by weight of organic fiber with respect to the total amount of the friction material composition, and 0.5 to 7.0% of the metal sulfide type lubricant as the lubricant with respect to the total amount of the friction material composition. % By weight, 4.0 to 5.0% by weight of carbonaceous lubricant with respect to the total amount of the friction material composition, 7.0 to 22.0% by weight of titanate with respect to the total amount of the friction material composition, inorganic As the friction modifier, an inorganic friction modifier having a Mohs hardness of 4.5 or more is 19.0-2 with respect to the total amount of the friction material composition. 0.0 wt%, Mohs hardness of less than 4.5 inorganic friction modifier is 10.0 to 16.0 wt% relative to the total friction material composition, and organic friction modifier is 3 relative to the total friction material composition. 0.0 to 7.0 wt%, pH adjusting material is contained in 2.0 to 3.0 wt% with respect to the total amount of the friction material composition, and the total amount of copper component contained in the metal fiber is the total amount of the friction material composition. Friction material characterized by being less than 5.0% by weight.
（２）モース硬度が４．５以上の無機摩擦調整材に含まれる四三酸化鉄を摩擦材組成物全量に対して２．０〜７．０重量％、モース硬度が４．５未満の無機摩擦調整材に含まれるマイカを摩擦材組成物全量に対して９．０〜１６．０重量％とすることを特徴とする（１）の摩擦材。 (2) The inorganic ferritic oxide contained in the inorganic friction modifier having a Mohs hardness of 4.5 or more is 2.0 to 7.0% by weight based on the total amount of the friction material composition, and the inorganic having a Mohs hardness of less than 4.5 The friction material according to (1), wherein mica contained in the friction modifier is 9.0 to 16.0% by weight based on the total amount of the friction material composition.
本発明によれば、ディスクブレーキパッドに使用される、ＮＡＯ材の摩擦材組成物を成型した摩擦材において、銅成分の含有量に関する法規を満足しながら、高速・高負荷時での摩擦係数の安定性、耐フェード性、耐摩耗性を確保できる摩擦材を提供できる。 According to the present invention, in a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad, the friction coefficient at high speed and high load is satisfied while satisfying the regulations regarding the content of the copper component. A friction material that can ensure stability, fade resistance, and wear resistance can be provided.
本発明においては、ディスクブレーキパッドに使用される、摩擦材組成物を成型した摩擦材において、金属繊維として銅繊維及び／又は銅合金繊維を摩擦材組成物全量に対して２．０〜６．０重量％、金属粒子としてスズ粒子を摩擦材組成物全量に対して１．０〜５．０重量％、結合材を摩擦材組成物全量に対して５．０〜１０．０重量％、有機繊維を摩擦材組成物全量に対して２．０〜６．０重量％、潤滑材として金属硫化物系潤滑材を摩擦材組成物全量に対して０．５〜７．０重量％、炭素質系潤滑材を摩擦材組成物全量に対して４．０〜５．０重量％、チタン酸塩を摩擦材組成物全量に対して７．０〜２２．０重量％、無機摩擦調整材としてモース硬度が４．５以上の無機摩擦調整材を摩擦材組成物全量に対して１９．０〜２４．０重量％、モース硬度が４．５未満の無機摩擦調整材を摩擦材組成物全量に対して１０．０〜１６．０重量％、有機摩擦調整材を摩擦材組成物全量に対して３．０〜７．０重量％、ｐH調整材を摩擦材組成物全量に対して２．０〜３．０重量％を含有し、金属繊維に含まれる銅成分の総量が摩擦材組成物全量に対して５．０重量％未満である摩擦材組成物を使用する。 In the present invention, in the friction material formed from the friction material composition used for the disc brake pad, copper fibers and / or copper alloy fibers are used as metal fibers in an amount of 2.0-6. 0% by weight, tin particles as metal particles in an amount of 1.0 to 5.0% by weight relative to the total amount of the friction material composition, binders as 5.0 to 10.0% by weight based on the total amount of the friction material composition, organic The fiber is 2.0 to 6.0% by weight with respect to the total amount of the friction material composition, and the metal sulfide type lubricant is 0.5 to 7.0% by weight with respect to the total amount of the friction material composition as the lubricant. -Based lubricant is 4.0 to 5.0 wt% with respect to the total amount of the friction material composition, titanate is 7.0 to 22.0 wt% with respect to the total amount of the friction material composition, and Mohs is used as the inorganic friction modifier. An inorganic friction modifier having a hardness of 4.5 or more is 19.0 to 24.0 times the total amount of the friction material composition %, Mohs hardness of less than 4.5 inorganic friction modifier is 10.0 to 16.0% by weight relative to the total friction material composition, and organic friction modifier is equal to 3.0 to the total friction material composition 7.0% by weight, pH adjusting material is contained in an amount of 2.0 to 3.0% by weight based on the total amount of the friction material composition, and the total amount of copper components contained in the metal fibers is 5% based on the total amount of the friction material composition. Use a friction material composition that is less than 0.0% by weight.
上記の摩擦材組成物を使用することにより、ディスクブレーキパッドに使用される、ＮＡＯ材の摩擦材組成物を成型した摩擦材において、銅成分の含有量に関する法規を満足しながら、高速・高負荷時での摩擦係数の安定性、耐フェード性、耐摩耗性の要求性能を確保できる摩擦材を提供することができる。 By using the friction material composition described above, the friction material formed from the NAO material friction material composition used in the disc brake pad satisfies high-speed and high-load while satisfying the laws and regulations concerning the copper content. It is possible to provide a friction material that can ensure the required performance of stability of friction coefficient, fade resistance, and wear resistance.
金属繊維としては、銅繊維や、青銅繊維、真鍮繊維等の銅合金繊維が挙げられ、これらは１種を単独で又は２種以上を組み合わせ、且つ、金属繊維に含まれる銅成分の総量が摩擦材組成物全量に対して５．０重量％未満となるよう使用する。金属粒子としてはスズ粒子を使用する。 Examples of the metal fiber include copper fiber, copper alloy fiber such as bronze fiber, brass fiber, etc., and these are used alone or in combination of two or more, and the total amount of copper components contained in the metal fiber is friction. It is used so that it may become less than 5.0 weight% with respect to the whole material composition. Tin particles are used as the metal particles.
結合材として、ストレートフェノール樹脂や、フェノール樹脂をカシューオイルやシリコーンオイル、アクリルゴム等の各種エラストマーで変性した樹脂、フェノール類とアラルキルエーテル類とアルデヒド類とを反応させて得られるアラルキル変性フェノール樹脂、フェノール樹脂に各種エラストマー、フッ素ポリマー等を分散させた熱硬化性樹脂等の摩擦材に通常用いられる結合材が挙げられ、これらは１種を単独で又は２種以上を組み合わせて使用することができる。 As a binder, straight phenol resin, resin obtained by modifying phenol resin with various elastomers such as cashew oil, silicone oil, acrylic rubber, aralkyl modified phenol resin obtained by reacting phenols, aralkyl ethers and aldehydes, Examples of the binder generally used for friction materials such as thermosetting resins in which various elastomers, fluoropolymers and the like are dispersed in a phenol resin can be used, and these can be used alone or in combination of two or more. .
有機繊維として、アラミド繊維、セルロース繊維、ポリ-パラフェニレンベンゾビスオキサゾール繊維、アクリル繊維等の摩擦材に通常使用される有機繊維が挙げられ、これらは１種を単独で又は２種以上を組み合わせて用いることができる。 Examples of organic fibers include organic fibers that are commonly used in friction materials such as aramid fibers, cellulose fibers, poly-paraphenylenebenzobisoxazole fibers, and acrylic fibers. These may be used alone or in combination of two or more. Can be used.
金属硫化物系潤滑材として、二硫化モリブデン、硫化亜鉛、硫化スズ、複合金属硫化物等、炭素質系潤滑材として、グラファイト、石油コークス、活性炭、酸化ポリアクリロニトリル繊維粉砕粉等の摩擦材に通常使用される潤滑材が挙げられ、これらは１種を単独で又は２種以上を組み合わせて用いることができる。 As metal sulfide lubricant, molybdenum disulfide, zinc sulfide, tin sulfide, composite metal sulfide, etc., and as carbonaceous lubricant, it is usually used as friction material such as graphite, petroleum coke, activated carbon, oxidized polyacrylonitrile fiber pulverized powder, etc. The lubricant used is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
チタン酸塩としては、板状の形状や、複数の凸部を有する不定形の形状をしたものが好ましく、チタン酸カリウム、チタン酸リチウムカリウム、チタン酸マグネシウムカリウム等の摩擦材に通常使用されるチタン酸塩が挙げられ、これらは１種を単独で又は２種以上を組み合わせて用いることができる。 The titanate preferably has a plate-like shape or an irregular shape having a plurality of convex portions, and is usually used for friction materials such as potassium titanate, lithium potassium titanate, and magnesium potassium titanate. A titanate is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
モース硬度が４．５以上の無機摩擦調整材として、四三酸化鉄、ゼオライト、ケイ酸カルシウム水和物、ガラスビーズ、酸化マグネシウム、酸化ジルコニウム、ケイ酸ジルコニウム、アルミナ、炭化ケイ素等の粒子状無機摩擦調整材や、ウォラストナイト、セピオライト、バサルト繊維、ガラス繊維、生体溶解性人造鉱物繊維、ロックウール等の繊維状無機摩擦調整材が挙げられ、これらは１種を単独で又は２種以上を組み合わせて用いることができる。 Particulate inorganic such as iron trioxide, zeolite, calcium silicate hydrate, glass beads, magnesium oxide, zirconium oxide, zirconium silicate, alumina, silicon carbide, etc. Examples include friction modifiers, wollastonite, sepiolite, basalt fibers, glass fibers, biosoluble artificial mineral fibers, and fibrous inorganic friction modifiers such as rock wool. These are used alone or in combination of two or more. They can be used in combination.
モース硬度が４．５未満の無機摩擦調整材として、マイカ、バーミキュライト、タルク、ドロマイト、カオリン、フッ化カルシウム等の粒子状無機摩擦調整材等の摩擦材に通常使用される潤滑材が挙げられ、これらは１種を単独で又は２種以上を組み合わせて用いることができる。 Examples of inorganic friction modifiers having a Mohs hardness of less than 4.5 include lubricants commonly used in friction materials such as particulate inorganic friction modifiers such as mica, vermiculite, talc, dolomite, kaolin, and calcium fluoride. These can be used individually by 1 type or in combination of 2 or more types.
特に、モース硬度が４．５以上の無機摩擦調整材として四三酸化鉄を摩擦材組成物全量に対して２．０〜７．０重量％、モース硬度が４．５未満の無機摩擦調整材としてマイカを摩擦材組成物全量に対して９．０〜１６．０重量％を添加すると、高速・高負荷時での摩擦係数の安定性がより向上するので好ましい。 In particular, as an inorganic friction modifier having a Mohs hardness of 4.5 or more, iron trioxide is 2.0 to 7.0% by weight based on the total amount of the friction material composition, and an inorganic friction modifier having a Mohs hardness of less than 4.5. If mica is added in an amount of 9.0 to 16.0% by weight based on the total amount of the friction material composition, the stability of the friction coefficient at high speed and high load is further improved, which is preferable.
有機摩擦調整材として、カシューダスト、タイヤトレッドゴムの粉砕粉や、ニトリルゴム、アクリルゴム、シリコーンゴム、ブチルゴム等の加硫ゴム粉末又は未加硫ゴム粉末等の摩擦材に通常使用される有機摩擦調整材が挙げられ、これらは１種を単独で又は２種以上を組み合わせて用いることができる。 Organic friction modifiers are usually used for friction materials such as cashew dust, crushed powder of tire tread rubber, vulcanized rubber powder such as nitrile rubber, acrylic rubber, silicone rubber, butyl rubber or unvulcanized rubber powder. An adjusting material is mentioned, These can be used individually by 1 type or in combination of 2 or more types.
ｐＨ調整材として水酸化カルシウムを使用することができる。 Calcium hydroxide can be used as a pH adjusting material.
摩擦材組成物の残部としては、硫酸バリウム、炭酸カルシウム等の充填材を使用する。 As the balance of the friction material composition, a filler such as barium sulfate or calcium carbonate is used.
本発明のディスクブレーキに使用される摩擦材は、所定量配合した上記の摩擦材組成物を、混合機を用いて均一に混合する混合工程、得られた摩擦材原料混合物と、別途、予め洗浄、表面処理、接着材を塗布したバックプレートを重ねて熱成形型に投入し、加熱加圧して成型する加熱加圧成型工程、得られた成型品を加熱して結合材の硬化反応を完了させる熱処理工程、摩擦面を形成する研磨処理工程を経て製造される。 The friction material used in the disc brake of the present invention is separately mixed with the friction material raw material mixture obtained by mixing the friction material composition mixed in a predetermined amount uniformly using a mixer. , Surface treatment, heat-pressing molding process in which a back plate coated with an adhesive is stacked and placed in a thermoforming mold, and heated and pressed to mold, and the resulting molded product is heated to complete the curing reaction of the binder It is manufactured through a heat treatment step and a polishing step for forming a friction surface.
必要に応じて、加熱加圧成型工程の前に、摩擦材原料混合物を造粒する造粒工程、摩擦材原料混合物を混練する混練工程、摩擦材原料混合物又は造粒工程で得られた造粒物、混練工程で得られた混練物を予備成型型に投入し、予備成型物を成型する予備成型工程が実施され、加熱加圧成型工程の後に、塗装・塗装焼き付け工程、スコーチ工程が実施される。 If necessary, before the heat and pressure molding step, granulation step for granulating the friction material raw material mixture, kneading step for kneading the friction material raw material mixture, granulation obtained in the friction material raw material mixture or granulation step The pre-molding process in which the kneaded product obtained in the kneading process is put into a pre-molding mold and the pre-molded product is molded is performed. The
以下、実施例及び比較例を示し、本発明を具体的に説明するが、本発明は下記の実施例に制限されるものではない。
［実施例１〜８・比較例１〜３の摩擦材の製造方法］
表１に示す組成の摩擦材組成物をレディゲミキサーにて５分間混合し、成型金型内で１０ＭＰaにて１分加圧して予備成型をした。この予備成型物を、予め洗浄、表面処理、接着材を塗布した鋼鉄製のバックプレート上に重ね、熱成型型内で成型温度１５０℃、成型圧力４０ＭＰaの条件下で１０分間成型した後、２００℃で５時間熱処理（後硬化）を行い、研磨して乗用車用ディスクブレーキパッドを作製した（実施例１〜８、比較例１〜３）。
得られた摩擦材において、摩擦係数の安定性、耐フェード性、耐摩耗性を評価した。評価結果を表２に、評価基準を表３に示す。
EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.
[Methods for producing friction materials of Examples 1 to 8 and Comparative Examples 1 to 3]
Friction material compositions having the compositions shown in Table 1 were mixed for 5 minutes with a Redige mixer, and pre-molded by pressing for 1 minute at 10 MPa in a molding die. This preform is placed on a steel back plate that has been washed, surface-treated, and coated with an adhesive, and molded in a thermoforming mold at a molding temperature of 150 ° C. and a molding pressure of 40 MPa for 10 minutes, and then 200 Heat treatment (post-curing) was carried out at 5 ° C. for 5 hours and polished to produce passenger car disc brake pads (Examples 1-8, Comparative Examples 1-3).
The obtained friction material was evaluated for stability of friction coefficient, fade resistance, and wear resistance. The evaluation results are shown in Table 2, and the evaluation criteria are shown in Table 3.
本発明によれば、ディスクブレーキパッドに使用される、ＮＡＯ材の摩擦材組成物を成型した摩擦材において、銅成分の含有量に関する法規を満足しながら、高速・高負荷時での摩擦係数の安定性、耐フェード性、耐摩耗性を確保できる摩擦材を得ることができ、きわめて実用的価値の高いものである。
According to the present invention, in a friction material obtained by molding a friction material composition of NAO material used for a disc brake pad, the friction coefficient at high speed and high load is satisfied while satisfying the regulations regarding the content of the copper component. A friction material that can ensure stability, fade resistance, and wear resistance can be obtained, and has extremely high practical value.
Claims (2)
前記摩擦材組成物は、
金属繊維として銅繊維及び／又は銅合金繊維を摩擦材組成物全量に対して２．０〜６．０重量％、
金属粒子として
スズ粒子を摩擦材組成物全量に対して１．０〜５．０重量％、
結合材を摩擦材組成物全量に対して５．０〜１０．０重量％、
有機繊維を摩擦材組成物全量に対して２．０〜６．０重量％、
潤滑材として
金属硫化物系潤滑材を摩擦材組成物全量に対して０．５〜７．０重量％、
炭素質系潤滑材を摩擦材組成物全量に対して４．０〜５．０重量％、
チタン酸塩を摩擦材組成物全量に対して７．０〜２２．０重量％、
無機摩擦調整材として
モース硬度が４．５以上の無機摩擦調整材を摩擦材組成物全量に対して１９．０〜２４．０重量％、
モース硬度が４．５未満の無機摩擦調整材を摩擦材組成物全量に対して１０．０〜１６．０重量％、
有機摩擦調整材を摩擦材組成物全量に対して３．０〜７．０重量％、
ｐH調整材を摩擦材組成物全量に対して２．０〜３．０重量％を含有し、
金属繊維に含まれる銅成分の総量が摩擦材組成物全量に対して５．０重量％未満であることを特徴とする摩擦材。 In the friction material molded from the friction material composition used for the disc brake pad,
The friction material composition is
Copper fiber and / or copper alloy fiber as metal fiber is 2.0 to 6.0% by weight based on the total amount of the friction material composition,
As metal particles, tin particles are 1.0 to 5.0% by weight based on the total amount of the friction material composition,
The binder is 5.0 to 10.0% by weight based on the total amount of the friction material composition,
2.0 to 6.0% by weight of organic fiber with respect to the total amount of the friction material composition,
As a lubricant, a metal sulfide-based lubricant is 0.5 to 7.0% by weight based on the total amount of the friction material composition,
The carbonaceous lubricant is 4.0 to 5.0% by weight with respect to the total amount of the friction material composition,
The titanate is 7.0 to 22.0% by weight based on the total amount of the friction material composition,
As an inorganic friction modifier, an inorganic friction modifier with a Mohs hardness of 4.5 or more is 19.0 to 24.0% by weight based on the total amount of the friction material composition
10.0 to 16.0% by weight of an inorganic friction modifier having a Mohs hardness of less than 4.5 based on the total amount of the friction material composition;
The organic friction modifier is 3.0 to 7.0% by weight based on the total amount of the friction material composition,
containing 2.0 to 3.0% by weight of the pH adjusting material with respect to the total amount of the friction material composition,
A friction material, wherein the total amount of copper components contained in the metal fiber is less than 5.0% by weight based on the total amount of the friction material composition.
Inorganic friction modifier with Mohs hardness of 4.5 to 7.0% by weight of iron trioxide contained in the inorganic friction modifier with 4.5 or more based on the total amount of the friction material composition 2. The friction material according to claim 1, wherein mica contained in the material is 9.0 to 16.0 wt% with respect to the total amount of the friction material composition.
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| JP2013268822A JP2014148666A (en) | 2013-01-11 | 2013-12-26 | Friction material |
| PCT/JP2014/050133 WO2014109328A1 (en) | 2013-01-11 | 2014-01-08 | Friction material |
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| JP2013003265 | 2013-01-11 | ||
| JP2013003265 | 2013-01-11 | ||
| JP2013268822A JP2014148666A (en) | 2013-01-11 | 2013-12-26 | Friction material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105154008A (en) * | 2015-10-20 | 2015-12-16 | 晋江凯燕化工有限公司 | Copper-free friction material for driving/braking and product of copper-free friction material |
| JP2016044230A (en) * | 2014-08-22 | 2016-04-04 | 日立オートモティブシステムズ株式会社 | Brake friction material |
| KR20180134936A (en) * | 2016-04-19 | 2018-12-19 | 닛신보 브레이크 가부시키가이샤 | Friction material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102406253B1 (en) * | 2014-07-24 | 2022-06-10 | 닛신보 브레이크 가부시키가이샤 | Friction material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0532956A (en) * | 1991-07-26 | 1993-02-09 | Aisin Chem Co Ltd | Friction material |
| JP2002241737A (en) * | 2001-02-20 | 2002-08-28 | Nisshinbo Ind Inc | Non-asbestos-based friction material |
| JP5331428B2 (en) * | 2008-09-29 | 2013-10-30 | 日立オートモティブシステムズ株式会社 | Brake friction material |
| JP5790175B2 (en) * | 2011-06-07 | 2015-10-07 | 日立化成株式会社 | Non-asbestos friction material composition |
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2013
- 2013-12-26 JP JP2013268822A patent/JP2014148666A/en active Pending
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2014
- 2014-01-08 WO PCT/JP2014/050133 patent/WO2014109328A1/en active Application Filing
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016044230A (en) * | 2014-08-22 | 2016-04-04 | 日立オートモティブシステムズ株式会社 | Brake friction material |
| CN105154008A (en) * | 2015-10-20 | 2015-12-16 | 晋江凯燕化工有限公司 | Copper-free friction material for driving/braking and product of copper-free friction material |
| KR20180134936A (en) * | 2016-04-19 | 2018-12-19 | 닛신보 브레이크 가부시키가이샤 | Friction material |
| KR102347391B1 (en) | 2016-04-19 | 2022-01-06 | 닛신보 브레이크 가부시키가이샤 | friction material |
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| WO2014109328A1 (en) | 2014-07-17 |
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