JP2019044189A - Friction material composition, and friction material and friction member using friction material composition - Google Patents
Friction material composition, and friction material and friction member using friction material composition Download PDFInfo
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- JP2019044189A JP2019044189A JP2018199445A JP2018199445A JP2019044189A JP 2019044189 A JP2019044189 A JP 2019044189A JP 2018199445 A JP2018199445 A JP 2018199445A JP 2018199445 A JP2018199445 A JP 2018199445A JP 2019044189 A JP2019044189 A JP 2019044189A
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- titanate
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- 239000002783 friction material Substances 0.000 title claims abstract description 106
- 239000000203 mixture Substances 0.000 title claims abstract description 60
- 239000002131 composite material Substances 0.000 title 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000013078 crystal Substances 0.000 claims abstract description 32
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052802 copper Inorganic materials 0.000 claims abstract description 23
- 239000010949 copper Substances 0.000 claims abstract description 23
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 3
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 238000000465 moulding Methods 0.000 claims description 15
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 6
- 239000011591 potassium Substances 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- OBTSLRFPKIKXSZ-UHFFFAOYSA-N lithium potassium Chemical group [Li].[K] OBTSLRFPKIKXSZ-UHFFFAOYSA-N 0.000 claims description 3
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 claims description 3
- SWHAQEYMVUEVNF-UHFFFAOYSA-N magnesium potassium Chemical compound [Mg].[K] SWHAQEYMVUEVNF-UHFFFAOYSA-N 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 description 25
- 239000000463 material Substances 0.000 description 12
- 239000011256 inorganic filler Substances 0.000 description 11
- 229910003475 inorganic filler Inorganic materials 0.000 description 11
- 239000005011 phenolic resin Substances 0.000 description 11
- 239000012766 organic filler Substances 0.000 description 9
- 239000010425 asbestos Substances 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 229910052895 riebeckite Inorganic materials 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- 229920001568 phenolic resin Polymers 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- 229910000881 Cu alloy Inorganic materials 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000012784 inorganic fiber Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 244000226021 Anacardium occidentale Species 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 235000020226 cashew nut Nutrition 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- -1 acrylic modified phenolic resin 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
- 239000000292 calcium oxide Substances 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 2
- 239000000428 dust 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
- 239000002557 mineral fiber Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 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
- 229940007424 antimony trisulfide Drugs 0.000 description 1
- NVWBARWTDVQPJD-UHFFFAOYSA-N antimony(3+);trisulfide Chemical compound [S-2].[S-2].[S-2].[Sb+3].[Sb+3] NVWBARWTDVQPJD-UHFFFAOYSA-N 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- NNLOHLDVJGPUFR-UHFFFAOYSA-L calcium;3,4,5,6-tetrahydroxy-2-oxohexanoate Chemical compound [Ca+2].OCC(O)C(O)C(O)C(=O)C([O-])=O.OCC(O)C(O)C(O)C(=O)C([O-])=O NNLOHLDVJGPUFR-UHFFFAOYSA-L 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 229920005556 chlorobutyl Polymers 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000013016 damping Methods 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
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000011151 fibre-reinforced plastic 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
- 238000010438 heat treatment Methods 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- HZZOEADXZLYIHG-UHFFFAOYSA-N magnesiomagnesium Chemical compound [Mg][Mg] HZZOEADXZLYIHG-UHFFFAOYSA-N 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical compound [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 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
- 239000010457 zeolite Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc 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
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
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- Braking Arrangements (AREA)
Abstract
Description
本発明は、自動車等の制動に用いられるディスクブレーキパッド等の摩擦材に適した摩擦材組成物及び摩擦材組成物を用いた摩擦材に関する。 The present invention relates to a friction material composition suitable for a friction material such as a disc brake pad used for braking of an automobile etc., and a friction material using the friction material composition.
自動車等には、その制動のためにディスクブレーキパッド、ブレーキライニング等の摩擦材が使用されている。摩擦材は、ディスクローター、ブレーキドラム等の対面材と摩擦することにより、制動の役割を果たしている。そのため、摩擦材には、良好な摩擦係数、耐摩耗性（摩擦材の寿命が長いこと）、強度、制振性（ブレーキ鳴きが発生しにくいこと）等が要求される。 In automobiles and the like, friction materials such as disc brake pads and brake linings are used for braking. The friction material plays a role of braking by friction with a facing material such as a disk rotor and a brake drum. Therefore, the friction material is required to have a good coefficient of friction, wear resistance (a long life of the friction material), strength, damping property (a brake is hard to occur), and the like.
摩擦材には、結合材、繊維基材、無機充填材及び有機充填材等を含む摩擦材組成物が用いられ、前記特性を発現させるために、一般的に、各成分を１種又は２種以上を組合せた摩擦材組成物が用いられる。無機充填材として、摩擦係数や耐摩耗性を向上させるために、チタン酸カリウムを配合することが提案されている（例えば、特許文献１〜３参照）。また、銅は、特に高温・高速での制動における耐摩耗性向上や摩擦係数向上に効果が高く、繊維基材として摩擦材に配合される。 As the friction material, a friction material composition including a binder, a fiber base, an inorganic filler, an organic filler and the like is used, and in order to exhibit the above-mentioned characteristics, generally, one or two of each component is used. The friction material composition which combined the above is used. As an inorganic filler, in order to improve a coefficient of friction and abrasion resistance, blending potassium titanate is proposed (for example, refer to patent documents 1-3). Further, copper is highly effective in improving the wear resistance and the friction coefficient particularly in braking at high temperatures and high speeds, and is compounded in a friction material as a fiber base.
しかし、銅や銅合金を含有する摩擦材は、制動時に生成する摩耗粉に銅を含み、河川、湖や海洋汚染等の原因となる可能性が示唆されているため、使用を制限する動きが高まっている。しかし、銅を含有しない摩擦材は、無機充填材として特許文献１〜３に記載のチタン酸カリウムを配合したとしても、高温・高速での制動における摩擦材の摩耗が極端に大きく、摩擦係数が低く安定しないという課題があった。 However, friction materials containing copper and copper alloys contain copper in the wear powder generated during braking, and it has been suggested that they may cause rivers, lakes, marine pollution, etc. It is rising. However, even if the copper-free friction material contains potassium titanate described in Patent Documents 1 to 3 as an inorganic filler, the wear of the friction material is extremely high during braking at high temperature and high speed, and the coefficient of friction is There was a problem of low stability.
本発明は、上記事情に鑑みなされたもので、環境負荷の高い銅を含有せず、高温・高速での制動における耐摩耗性、摩擦係数の安定性に優れた摩擦材を提供することを目的とするものである。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a friction material which does not contain copper with high environmental load and is excellent in wear resistance and stability of friction coefficient at high temperature and high speed braking. It is said that.
本発明者らは、鋭意検討を重ねた結果、銅や銅合金を含有せず、トンネル状結晶構造のチタン酸塩を層状結晶構造のチタン酸塩を両方含有する摩擦材組成物を用いることで、上記課題を解決できることを見出し、本発明を完成した。すなわち、本発明は下記のとおりである。
（１）結合材、有機充填材、無機充填材及び繊維基材を含む摩擦材組成物であって、該摩擦材組成物中の銅の含有量が銅元素として０．５質量％以下であり、チタン酸塩としてトンネル状結晶構造のチタン酸塩及び層状結晶構造のチタン酸塩を含有する摩擦材組成物。
（２）トンネル状結晶構造のチタン酸塩が６チタン酸カリウム又は８チタン酸カリウム若しくはチタン酸ナトリウムである上記（１）に記載の摩擦材組成物。
（３）前記層状結晶構造のチタン酸塩がチタン酸リチウムカリウム又はチタン酸マグネシウムカリウムである上記（１）又は（２）に記載の摩擦材組成物。
（４）前記チタン酸塩を合計量で２０〜５０質量％含有する上記（１）〜（３）のいずれかに記載の摩擦材組成物。
（５）前記トンネル状結晶構造のチタン酸塩の含有量が１０〜３５質量％である上記（１）〜（４）のいずれかに記載の摩擦材組成物。
（６）前記層状結晶構造のチタン酸塩の含有量が１０〜３５質量％である上記（１）〜（５）のいずれかに記載の摩擦材組成物。
（７）前記層状結晶構造のチタン酸塩とトンネル状結晶構造のチタン酸塩の含有量比率が３０：７０〜７０：３０である上記（１）〜（６）のいずれかに記載の摩擦材組成物。
（８）上記（１）〜（７）のいずれかに記載の摩擦材組成物を成形してなる摩擦材。
（９）上記（１）〜（７）のいずれかに記載の摩擦材組成物を成形してなる摩擦材と裏金とを用いて形成される摩擦部材。
As a result of intensive studies, the inventors of the present invention have found that a friction material composition which does not contain copper or a copper alloy but contains a titanate having a tunnel crystal structure and a titanate having a layered crystal structure is used. The present invention has been completed because it has been found that the above problems can be solved. That is, the present invention is as follows.
(1) A friction material composition comprising a binder, an organic filler, an inorganic filler and a fiber base, wherein the content of copper in the friction material composition is 0.5% by mass or less as copper element A friction material composition comprising, as a titanate, a titanate having a tunnel crystal structure and a titanate having a layered crystal structure.
(2) The friction material composition according to (1), wherein the titanate having a tunnel-like crystal structure is potassium hexatitanate or potassium octatitanate or sodium titanate.
(3) The friction material composition according to (1) or (2) above, wherein the layered crystal structure titanate is lithium potassium titanate or magnesium magnesium titanate.
(4) The friction material composition according to any one of the above (1) to (3), which contains the titanate in a total amount of 20 to 50% by mass.
(5) The friction material composition according to any one of the above (1) to (4), wherein the content of the titanate having a tunnel-like crystal structure is 10 to 35% by mass.
(6) The friction material composition according to any one of the above (1) to (5), wherein the content of the titanate having a layered crystal structure is 10 to 35% by mass.
(7) The friction material according to any one of the above (1) to (6), wherein the content ratio of the titanate having a layered crystal structure and the titanate having a tunnel-like crystal structure is 30:70 to 70:30. Composition.
(8) A friction material formed by molding the friction material composition according to any one of the above (1) to (7).
(9) A friction member formed using a friction material formed by molding the friction material composition according to any one of the above (1) to (7) and a back metal.
本発明によれば、自動車用ディスクブレーキパッド等の摩擦材に用いた際に、環境負荷の高い銅を用いなくとも高温・高速での制動における耐摩耗性、摩擦係数の安定性に優れた摩擦材組成物、摩擦材及び摩擦部材を提供することができる。 According to the present invention, when used as a friction material such as a disc brake pad for automobiles, the friction is excellent in the stability of the wear resistance and the coefficient of friction at high temperature and high speed braking without using copper having high environmental load. A material composition, a friction material and a friction member can be provided.
以下、本発明の摩擦材組成物、これを用いた摩擦材及び摩擦部材について詳述する。なお、本発明の摩擦材組成物は、ノンアスベスト摩擦材組成物である。 Hereinafter, the friction material composition of the present invention, the friction material and the friction member using the same will be described in detail. The friction material composition of the present invention is a non-asbestos friction material composition.
［摩擦材組成物］
本実施形態の摩擦材組成物は、銅の含有量が銅元素として０．５質量％以下である摩擦材組成物である。銅の含有量を銅元素として０．５質量％以下とすることで、従来の摩擦材と比較して環境負荷の少ないものとすることができる。
[Friction material composition]
The friction material composition of the present embodiment is a friction material composition in which the content of copper is 0.5% by mass or less as copper element. By setting the content of copper to 0.5 mass% or less as a copper element, the environmental load can be reduced compared to the conventional friction material.
（チタン酸塩）
本実施形態においては、銅の少ない組成における高温・高速での制動における耐摩耗性、摩擦係数の安定性向上のために、トンネル状結晶構造のチタン酸塩と層状結晶構造のチタン酸塩とを共に含有する。
チタン酸塩は摩擦係数の安定性向上や耐摩耗性向上を目的として摩擦材に添加されるが、トンネル状結晶構造のチタン酸塩は特に低速制動での摩擦係数の安定性が高く、層状結晶構造のチタン酸塩は高温での摩耗抑制効果が高い。しかし、これらのチタン酸塩の単独添加では、高速制動における摩擦係数保持や耐摩耗性の改善効果は小さい。
トンネル状結晶構造のチタン酸塩と層状結晶構造のチタン酸塩を組み合わせて用いることで、低速制動での摩擦係数安定性や高温での摩耗抑制効果に優れるだけでなく、高速制動における摩擦係数保持や耐摩耗性にも優れる摩擦材が得られる。
前記チタン酸塩の含有量は、合計で２０〜５０質量％であることが好ましく、２０〜４０質量％であることがより好ましく、２０〜３０質量％であることが更に好ましい。チタン酸塩の含有量が２０質量％以上であると高温・高速での制動における耐摩耗性、摩擦係数の安定性が良好であり、５０質量％以下であると摩擦係数が低下することがない。前記チタン酸塩としては、繊維状、鱗片状、柱状、板状のものを使用することができるが、人体有害性の観点で鱗片状、柱状、板状のものが好ましい。
トンネル状結晶構造のチタン酸塩としては、８チタン酸カリウム、６チタン酸カリウム、チタン酸ナトリウムを用いることができ、含有量は１０〜３５質量％が好ましく、１０〜２５質量％がより好ましい。１０質量％以上であると高温・高速での制動における耐摩耗性、摩擦係数の安定性が良好であり、３５質量％以下であると摩擦係数が低下することがない。
層状結晶構造のチタン酸塩としては、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を用いることができ、含有量は１０〜３５質量％が好ましく、１０〜２５質量％が更に好ましい。１０質量％以上であると高温・高速での制動における耐摩耗性、摩擦係数の安定性が良好であり、３５質量％以下であると摩擦係数が低下することがない。
また、層状構造の結晶構造のチタン酸塩とトンネル構造の結晶構造のチタン酸塩の含有量比率は、３０：７０〜７０：３０であることが好ましい。この比率でチタン酸塩を含有させることで、高速での制動において、高い耐摩耗性、摩擦係数保持効果を得ることができる。
(Titanate)
In this embodiment, a titanate having a tunnel crystal structure and a titanate having a layered crystal structure are used to improve the wear resistance and the stability of the friction coefficient during high temperature and high speed braking with a low copper composition. It contains together.
Titanate is added to the friction material for the purpose of improving the stability of the friction coefficient and the wear resistance, but the titanate having a tunnel-like crystal structure has particularly high stability of the friction coefficient at low speed braking, and layered crystals The structure titanate is highly effective in suppressing wear at high temperatures. However, the addition of these titanates alone has little effect on the improvement of friction coefficient retention and wear resistance at high speed braking.
The combination of a titanate with a tunnel-like crystal structure and a titanate with a layered crystal structure not only excels in the coefficient of friction stability at low speed braking and the effect of suppressing wear at high temperatures, but also maintains the coefficient of friction at high speed braking And a friction material which is also excellent in wear resistance.
The total content of the titanate is preferably 20 to 50% by mass, more preferably 20 to 40% by mass, and still more preferably 20 to 30% by mass. When the content of the titanate is 20% by mass or more, the stability of the wear resistance and the coefficient of friction in braking at high temperature and high speed is good, and when it is 50% by mass or less, the coefficient of friction does not decrease . As the titanate, fibrous, scaly, columnar, or plate-like ones can be used, but from the viewpoint of human toxicity, scaly, columnar, or plate-like ones are preferable.
As a titanate having a tunnel-like crystal structure, potassium octatitanate, potassium hexatitanate, or sodium titanate can be used. The content is preferably 10 to 35% by mass, and more preferably 10 to 25% by mass. If the content is 10% by mass or more, the wear resistance and the stability of the friction coefficient during braking at high temperature and high speed are good, and if the content is 35% by mass or less, the friction coefficient does not decrease.
As a titanate having a layered crystal structure, lithium potassium titanate and magnesium potassium titanate can be used, and the content is preferably 10 to 35% by mass, and more preferably 10 to 25% by mass. If the content is 10% by mass or more, the wear resistance and the stability of the friction coefficient during braking at high temperature and high speed are good, and if the content is 35% by mass or less, the friction coefficient does not decrease.
Moreover, it is preferable that the content ratio of the titanate of the crystal structure of layered structure and the titanate of the crystal structure of tunnel structure is 30:70-70:30. By containing titanate at this ratio, it is possible to obtain high wear resistance and a coefficient of friction holding effect in braking at high speed.
（無機充填材）
無機充填材は、摩擦材の耐熱性の悪化を避けるためや、耐摩耗性を向上させるため、摩擦係数を向上する目的で添加される摩擦調整剤として含まれるものである。本実施形態のノンアスベスト摩擦材用組成物は、通常、摩擦材に用いられる無機充填材であれば特に制限はない。
(Inorganic filler)
The inorganic filler is included as a friction modifier to be added for the purpose of improving the friction coefficient in order to avoid the deterioration of the heat resistance of the friction material and to improve the wear resistance. The composition for non-asbestos friction material of the present embodiment is not particularly limited as long as it is an inorganic filler generally used for the friction material.
上記無機充填材としては、例えば、硫化錫、二硫化モリブデン、硫化鉄、三硫化アンチモン、硫化ビスマス、硫化亜鉛、水酸化カルシウム、酸化カルシウム、炭酸ナトリウム、炭酸カルシウム、炭酸マグネシウム、硫酸バリウム、ドロマイト、コークス、黒鉛、マイカ、酸化鉄、バーミキュライト、硫酸カルシウム、タルク、クレー、ゼオライト、ケイ酸ジルコニウム、酸化ジルコニウム、ムライト、クロマイト、酸化チタン、酸化マグネシウム、シリカ、酸化鉄、γ−アルミナなどの活性アルミナを用いることができ、これらを単独で又は２種類以上を組み合わせて使用することができる。 Examples of the inorganic filler include tin sulfide, molybdenum disulfide, iron sulfide, antimony trisulfide, bismuth sulfide, zinc sulfide, calcium hydroxide, calcium oxide, sodium carbonate, calcium carbonate, magnesium carbonate, barium sulfate, dolomite, Activated aluminas such as coke, graphite, mica, iron oxide, vermiculite, calcium sulfate, talc, clay, zeolite, zirconium silicate, zirconium oxide, mullite, chromite, titanium oxide, magnesium oxide, silica, iron oxide and γ-alumina These can be used, and these can be used individually or in combination of 2 or more types.
本実施形態のノンアスベスト摩擦材組成物中における、無機充填材の含有量は、３０〜８０質量％であることが好ましく、４０〜７０質量％であることがより好ましく、５０〜６０質量％であることが更に好ましい。無機充填材の含有量を３０〜８０質量％の範囲とすることで、耐熱性の悪化を避けることができ、摩擦材のその他成分の含有量バランスの点でも好ましい。 The content of the inorganic filler in the non-asbestos friction material composition of the present embodiment is preferably 30 to 80% by mass, more preferably 40 to 70% by mass, and 50 to 60% by mass. It is further preferred that By making content of an inorganic filler into the range of 30-80 mass%, a heat resistant deterioration can be avoided and it is preferable also at the point of content balance of the other component of a friction material.
（有機充填材）
有機充填材は、摩擦材の音振性能や耐摩耗性などを向上させるための摩擦調整剤として含まれるものである。本実施形態のノンアスベスト摩擦材組成物に含まれる有機充填材としては、上記性能を発揮できるものであれば特に制限はなく、通常、有機充填材として用いられる、カシューダストやゴム成分などを用いることができる。
(Organic filler)
The organic filler is included as a friction modifier for improving the sound vibration performance and the wear resistance of the friction material. The organic filler contained in the non-asbestos friction material composition of the present embodiment is not particularly limited as long as the above-mentioned performance can be exhibited, and a cashew dust, a rubber component or the like usually used as an organic filler is used. be able to.
上記カシューダストは、カシューナッツシェルオイルを硬化させたものを粉砕して得られる、通常、摩擦材に用いられるものであればよい。 The above-mentioned cashew dust may be obtained by pulverizing the hardened cashew nut shell oil, and it may be one which is usually used as a friction material.
上記ゴム成分としては、例えば、タイヤゴム、アクリルゴム、イソプレンゴム、ＮＢＲ（ニトリルブタジエンゴム）、ＳＢＲ（スチレンブタジエンゴム）、塩素化ブチルゴム、ブチルゴム、シリコーンゴム、などが挙げられ、これらを単独で又は２種類以上を組み合わせて使用される。 Examples of the rubber component include tire rubber, acrylic rubber, isoprene rubber, NBR (nitrile butadiene rubber), SBR (styrene butadiene rubber), chlorinated butyl rubber, butyl rubber, silicone rubber, etc. These may be used alone or in combination. Used in combination of more than one type.
本実施形態のノンアスベスト摩擦材組成物中における、有機充填材の含有量は、１〜２０質量％であることが好ましく、１〜１０質量％であることがより好ましく、３〜８質量％であることが更に好ましい。有機充填材の含有量を１〜２０質量％の範囲とすることで、摩擦材の弾性率が高くなること、鳴きなどの音振性能の悪化を避けることができ、また耐熱性の悪化、熱履歴による強度低下を避けることができる。 The content of the organic filler in the non-asbestos friction material composition of the present embodiment is preferably 1 to 20% by mass, more preferably 1 to 10% by mass, and 3 to 8% by mass. It is further preferred that By setting the content of the organic filler in the range of 1 to 20% by mass, the elastic modulus of the friction material becomes high, the deterioration of the sound vibration performance such as noise can be avoided, and the heat resistance is deteriorated, and the heat is deteriorated. It is possible to avoid the strength reduction due to the history.
（結合材）
結合材は、摩擦材用組成物に含まれる有機充填材、無機充填材及び繊維基材などを一体化し、強度を与えるものである。本実施形態の摩擦材用組成物に含まれる結合材としては特に制限は無く、通常、摩擦材の結合材として用いられる熱硬化性樹脂を用いることができる。
(Binder)
The binder integrates the organic filler, the inorganic filler, the fiber base and the like contained in the composition for friction material to give strength. There is no restriction | limiting in particular as a binder contained in the composition for friction materials of this embodiment, Usually, the thermosetting resin used as a binder of a friction material can be used.
上記熱硬化性樹脂としては、例えば、フェノール樹脂；アクリルエラストマー分散フェノール樹脂及びシリコーンエラストマー分散フェノール樹脂などの各種エラストマー分散フェノール樹脂；アクリル変性フェノール樹脂、シリコーン変性フェノール樹脂、カシュー変性フェノール樹脂、エポキシ変性フェノール樹脂及びアルキルベンゼン変性フェノール樹脂などの各種変性フェノール樹脂などが挙げられ、これらを単独で又は２種類以上を組み合わせて使用することができる。特に、良好な耐熱性、成形性及び摩擦係数を与えることから、フェノール樹脂、アクリル変性フェノール樹脂、シリコーン変性フェノール樹脂、アルキルベンゼン変性フェノール樹脂を用いることが好ましい。 Examples of the thermosetting resin include: phenol resins; various elastomer-dispersed phenol resins such as acrylic elastomer-dispersed phenol resins and silicone elastomer-dispersed phenol resins; acrylic-modified phenolic resins, silicone-modified phenolic resins, cashew-modified phenolic resins, epoxy-modified phenols Examples thereof include resins and various modified phenolic resins such as alkylbenzene-modified phenolic resins, and these can be used alone or in combination of two or more. In particular, it is preferable to use a phenol resin, an acrylic modified phenolic resin, a silicone modified phenolic resin, and an alkylbenzene modified phenolic resin in order to give good heat resistance, moldability and a coefficient of friction.
本実施形態のノンアスベスト摩擦材組成物中における、結合材の含有量は、５〜２０質量％であることが好ましく、５〜１０質量％であることがより好ましい。結合材の含有量を５〜２０質量％の範囲とすることで、摩擦材の強度低下をより抑制でき、また、摩擦材の気孔率が減少し、弾性率が高くなることによる鳴きなどの音振性能悪化をより抑制できる。 The content of the binder in the non-asbestos friction material composition of the present embodiment is preferably 5 to 20% by mass, and more preferably 5 to 10% by mass. By setting the content of the binder in the range of 5 to 20% by mass, it is possible to further suppress the decrease in strength of the friction material, and to reduce the porosity of the friction material and to increase the modulus of elasticity. Vibration performance deterioration can be further suppressed.
（繊維基材）
繊維基材は、摩擦材において補強作用を示すものである。
本実施形態のノンアスベスト摩擦材組成物は、通常、繊維基材として用いられる、前記チタン酸塩の繊維以外の無機繊維、金属繊維、有機繊維、炭素系繊維などを用いることができ、これらを単独で又は二種類以上を組み合わせて使用することができる。
(Fiber base material)
The fibrous base material exhibits a reinforcing action in the friction material.
As the non-asbestos friction material composition of the present embodiment, inorganic fibers other than the above-mentioned titanate fibers, metal fibers, organic fibers, carbon-based fibers, etc., which are usually used as fiber substrates, can be used. It can be used alone or in combination of two or more.
上記チタン酸塩の繊維以外の無機繊維としては、セラミック繊維、生分解性セラミック繊維、鉱物繊維、ガラス繊維、シリケート繊維などを用いることができ、１種又は２種以上を組み合わせて用いることができる。これら、無機繊維の中では、ＳｉＯ２、Ａｌ２Ｏ３、ＣａＯ、ＭｇＯ、ＦｅＯ、Ｎａ２Ｏなどを任意の組み合わせで含有した生分解性鉱物繊維が好ましく、市販品としてはＬＡＰＩＮＵＳ ＦＩＢＥＲＳ Ｂ．Ｖ製のＲｏｘｕｌシリーズなどが挙げられる。 Ceramic fibers, biodegradable ceramic fibers, mineral fibers, glass fibers, silicate fibers and the like can be used as inorganic fibers other than the above-mentioned titanate fibers, and one or more types can be used in combination . Among these inorganic fibers, biodegradable mineral fibers containing SiO 2 , Al 2 O 3 , CaO, MgO, FeO, Na 2 O and the like in any combination are preferable, and commercially available LAPINUS FIBERS B. V-made Roxul series etc. are mentioned.
上記金属繊維としては、通常、摩擦材に用いられるものであれば特に制限はないが、例えば、アルミ、鉄、亜鉛、錫、チタン、ニッケル、マグネシウム、シリコンなどの銅及び銅合金以外の金属単体又は合金形態の繊維や、鋳鉄繊維などの金属を主成分とする繊維が挙げられる。 The metal fiber is not particularly limited as long as it is generally used as a friction material, but, for example, a single metal other than copper and copper alloy such as aluminum, iron, zinc, tin, titanium, nickel, magnesium and silicon Or fibers in the form of an alloy, or fibers mainly composed of metals such as cast iron fibers.
なお、本実施形態品は、環境有害性の高い銅及び銅合金を実質的に含有せず、元素としての銅の含有量が０．５質量％以下であり、好ましくは含有量０質量％である。 In addition, the product of the present embodiment contains substantially no environmentally harmful copper and copper alloy, and the content of copper as an element is 0.5% by mass or less, preferably 0% by mass. is there.
上記有機繊維としては、アラミド繊維、セルロース繊維、アクリル繊維、フェノール樹脂繊維などを用いることができ、これらを単独で又は２種類以上を組み合わせて使用することができる。 Aramid fibers, cellulose fibers, acrylic fibers, phenolic resin fibers and the like can be used as the organic fibers, and these can be used alone or in combination of two or more.
上記炭素系繊維としては、耐炎化繊維、ピッチ系炭素繊維、ＰＡＮ系炭素繊維、活性炭繊維などを用いることができ、これらを単独で又は２種類以上を組み合わせて使用することができる。 As said carbon-based fiber, a flame-resistant fiber, a pitch-based carbon fiber, a PAN-based carbon fiber, an activated carbon fiber etc. can be used, These can be used individually or in combination of 2 or more types.
本実施形態のノンアスベスト摩擦材組成物における、繊維基材の含有量は、摩擦材組成物において５〜４０質量％であることが好ましく、５〜２０質量％であることがより好ましく、５〜１５質量％であることが更に好ましい。繊維基材の含有量を５〜４０質量％の範囲とすることで、摩擦材としての最適な気孔率が得られ、鳴き防止ができ、適正な材料強度が得られ、耐摩耗性を発現し、成形性をよくすることができる。 The content of the fiber base in the non-asbestos friction material composition of the present embodiment is preferably 5 to 40% by mass, more preferably 5 to 20% by mass in the friction material composition, and 5 to 5%. More preferably, it is 15% by mass. By setting the content of the fiber base in the range of 5 to 40% by mass, an optimum porosity as a friction material can be obtained, squeak prevention can be performed, appropriate material strength can be obtained, and abrasion resistance is developed. The formability can be improved.
［摩擦材］
本実施形態の摩擦材は、本実施形態の摩擦材組成物を一般に使用されている方法で成形して製造することができ、好ましくは加熱加圧成形して製造される。詳細には、例えば、本実施形態の摩擦材組成物をレーディゲミキサー（「レーディゲ」は登録商標）、加圧ニーダー、アイリッヒミキサー（「アイリッヒ」は登録商標）等の混合機を用いて均一に混合し、この混合物を成形金型にて予備成形し、得られた予備成形物を成形温度１３０〜１６０℃、成形圧力２０〜５０ＭＰａ、成形時間２〜１０分間の条件で成形し、得られた成形物を１５０〜２５０℃で２〜１０時間熱処理することで製造される。また更に、必要に応じて塗装、スコーチ処理、研磨処理を行うことで製造される。
[Friction material]
The friction material of the present embodiment can be manufactured by molding the friction material composition of the present embodiment by a generally used method, and is preferably manufactured by heat and pressure molding. In detail, for example, the friction material composition of the present embodiment is mixed using a mixer such as a Loedige mixer ("Ledige" is a registered trademark), a pressure kneader, an Eirich mixer ("Eyrich" is a registered trademark), etc. The mixture is uniformly mixed, this mixture is preformed in a molding die, and the obtained preform is molded under the conditions of a molding temperature of 130 to 160 ° C., a molding pressure of 20 to 50 MPa and a molding time of 2 to 10 minutes. The resulting molded product is manufactured by heat treatment at 150 to 250 ° C. for 2 to 10 hours. Furthermore, it is manufactured by performing coating, scorch processing, and polishing processing as needed.
［摩擦部材］
本実施形態の摩擦部材は、上記の本実施形態の摩擦材を摩擦面となる摩擦材として用いてなる。上記摩擦部材としては、例えば、下記の構成が挙げられる。（１）摩擦材のみの構成（２）裏金と、該裏金の上に摩擦面となる本発明の摩擦材組成物からなる摩擦材とを有する構成（３）上記（２）の構成において、裏金と摩擦材との間に、裏金の接着効果を高めるための表面改質を目的としたプライマー層、及び、裏金と摩擦材との接着を目的とした接着層を更に介在させた構成
[Friction member]
The friction member of the present embodiment uses the friction material of the present embodiment described above as a friction material to be a friction surface. As the above-mentioned friction member, the following composition is mentioned, for example. (1) Configuration of only friction material (2) Configuration including the back metal and the friction material comprising the friction material composition of the present invention to be a friction surface on the back metal (3) In the configuration of the above (2), the back metal Composition further including a primer layer for surface modification to enhance the adhesion effect of the back metal, and an adhesion layer for adhesion between the back metal and the friction material between
上記裏金は、摩擦部材の機械的強度の向上のために、通常、摩擦部材として用いるものであり、材質としては、金属又は繊維強化プラスチック等、具体的には、鉄、ステンレス、無機繊維強化プラスチック、炭素繊維強化プラスチック等が挙げられる。プライマー層及び接着層は、通常、ブレーキシュー等の摩擦部材に用いられるものであればよい。 The above-mentioned back metal is usually used as a friction member in order to improve the mechanical strength of the friction member, and the material is metal or fiber reinforced plastic etc. Specifically, iron, stainless steel, inorganic fiber reinforced plastic And carbon fiber reinforced plastics. The primer layer and the adhesive layer may be those generally used for a friction member such as a brake shoe.
本実施形態の摩擦材組成物は、摩擦係数、耐クラック性、耐摩耗性等に優れるため、自動車等のディスクブレーキパッドやブレーキライニング等の上張り材として特に有用であるが、高い耐クラック性を有するため、摩擦部材の下張り材として成形して用いることもできる。なお、「上張り材」とは、摩擦部材の摩擦面となる摩擦材であり、「下張り材」とは、摩擦部材の摩擦面となる摩擦材と裏金との間に介在する、摩擦材と裏金との接着部付近のせん断強度、耐クラック性向上等を目的とした層のことである。 The friction material composition of the present embodiment is particularly useful as an overlay material for disc brake pads and brake linings of automobiles and the like because it is excellent in friction coefficient, crack resistance, wear resistance, etc. Therefore, it can also be used by molding as a lining material for the friction member. Here, the "overlaying material" is a friction material which is the friction surface of the friction member, and the "underlaying material" is a friction material which is interposed between the friction material which is the friction surface of the friction member and the backing metal. It is a layer for the purpose of improving shear strength, crack resistance, etc. in the vicinity of the bonding portion with the back metal.
以下、本発明の摩擦材組成物、摩擦材及び摩擦部材について、実施例及び比較例を用いて更に詳細に説明するが、本発明は何らこれらに制限されるものではない。 Hereinafter, the friction material composition, the friction material and the friction member of the present invention will be described in more detail using Examples and Comparative Examples, but the present invention is not limited to these in any way.
［実施例１〜８及び比較例１〜８］（ディスクブレーキパッドの作製）
表２に示す配合比率に従って材料を配合し、実施例１〜８及び比較例１〜８の摩擦材組成物を得た。この摩擦材組成物をレーディゲミキサー（株式会社マツボー製、商品名：レーディゲミキサーＭ２０）で混合し、得られた混合物を成形プレス（王子機械工業株式会社製）で予備成形した。得られた予備成形物を成形温度１４０〜１６０℃、成形圧力３０ＭＰａ、成形時間５分間の条件で、成形プレス（三起精工株式会社製）を用いて鉄製の裏金（日立オートモティブシステムズ株式会社製）と共に加熱加圧成形した。得られた成形品を２００℃で４．５時間熱処理し、ロータリー研磨機を用いて研磨し、５００℃のスコーチ処理を行って、実施例１〜４及び比較例１〜２のディスクブレーキパッドを得た。なお、実施例及び比較例では、裏金の厚さ６ｍｍ、摩擦材の厚さ１１ｍｍ、摩擦材投影面積５２ｃｍ２のディスクブレーキパッドを作製した。
なお、実施例及び比較例において使用したチタン酸塩は表１のとおりである。
[Examples 1 to 8 and Comparative Examples 1 to 8] (Production of Disc Brake Pad)
The materials were compounded according to the compounding ratio shown in Table 2, and friction material compositions of Examples 1 to 8 and Comparative Examples 1 to 8 were obtained. This friction material composition was mixed by a Loedige mixer (made by Matsubo Co., Ltd., trade name: Loedige mixer M20), and the obtained mixture was preformed by a molding press (manufactured by Oji Machine Industry Co., Ltd.). The obtained preform is iron back metal (made by Hitachi Automotive Systems, Ltd.) using a molding press (made by Sanki Seiko Co., Ltd.) under the conditions of molding temperature 140 to 160 ° C., molding pressure 30 MPa and molding time 5 minutes It heat-pressed with it. The resulting molded product is heat-treated at 200 ° C. for 4.5 hours, polished using a rotary polisher, and scorked at 500 ° C. to give the disc brake pads of Examples 1 to 4 and Comparative Examples 1 to 2. Obtained. In the example and the comparative example, a disc brake pad having a backing metal thickness of 6 mm, a friction material thickness of 11 mm, and a friction material projected area of 52 cm 2 was produced.
In addition, the titanate used in the Example and the comparative example is as Table 1.
（摩擦係数の評価）
摩擦係数は、自動車技術会規格ＪＡＳＯ Ｃ４０６に基づき測定し、第２効力試験の車速５０ｋｍ／ｈ、減速度０．６Ｇ、及び車速１８０ｋｍ／ｈ、減速度０．６Ｇにおける摩擦係数の平均値を算出した。評価結果を表２に示す。
(Evaluation of friction coefficient)
The coefficient of friction is measured based on the Japan Automobile Engineering Society Standard JASO C406, and the average value of the coefficient of friction at the vehicle speed 50km / h, deceleration 0.6G, vehicle speed 180km / h and deceleration 0.6G of the second efficacy test is calculated. did. The evaluation results are shown in Table 2.
（高温、高速における制動での耐摩耗性の評価）
耐摩耗性は、自動車技術会規格ＪＡＳＯ Ｃ４２７に基づき測定し、ブレーキ温度４００℃、車速５０ｋｍ／ｈ、減速度０．３Ｇの制動１０００回相当の摩擦材の摩耗量を評価し、高温での耐摩耗性とした。また、ブレーキ温度２００℃、車速１００ｋｍ／ｈ、減速度０．３Ｇの制動１０００回相当の摩擦材の摩耗量を評価し、高速制動における耐摩耗性とした。評価結果を表２に示す。
なお、上記摩擦係数、耐摩耗性の評価はダイナモメーターを用い、イナーシャ７ｋｇｆ・ｍ・ｓｅｃ２で評価を行った。また、ベンチレーテッドディスクロータ（株式会社キリウ製、材質ＦＣ１９０）、一般的なピンスライド式のコレットタイプのキャリパを用いて実施した。
(Evaluation of wear resistance in braking at high temperature and high speed)
Wear resistance is measured based on JASO C 427 according to Automobile Engineering Standards Standard, and the wear amount of the friction material equivalent to 1000 times of braking with a brake temperature of 400 ° C, a vehicle speed of 50km / h and a deceleration of 0.3G is evaluated. Abrasive. Further, the wear amount of the friction material equivalent to a brake temperature of 200 ° C., a vehicle speed of 100 km / h and a deceleration of 0.3 G and equivalent to 1000 times of braking was evaluated to determine abrasion resistance in high speed braking. The evaluation results are shown in Table 2.
Incidentally, the coefficient of friction, the evaluation of wear resistance with a dynamometer, was evaluated in inertia 7kgf · m · sec 2. Moreover, it implemented using a ventilated disc rotor (made by Kiriu, material FC190), and a common pin slide type collet type caliper.
表２に示すように、実施例１〜８は、銅を含有する比較例８と同水準の摩擦係数、耐摩耗性を示した。また、実施例１〜８は、トンネル型結晶構造のチタン酸塩と層状結晶構造のチタン酸塩の一方だけを含有する比較例１〜７に対して高速での摩擦係数が高く、低速と高速の摩擦係数の差が少なく安定している。更に高速及び高温の耐摩耗性が優れることは明らかである。 As shown in Table 2, Examples 1 to 8 exhibited the same level of friction coefficient and wear resistance as Comparative Example 8 containing copper. Further, Examples 1 to 8 have high friction coefficients at high speed, and low speed and high speed as compared with Comparative Examples 1 to 7 containing only one of the titanate of the tunnel type crystal structure and the titanate of the layered crystal structure. The difference in the coefficient of friction is small and stable. Furthermore, it is clear that high-speed and high-temperature wear resistance is excellent.
本発明の摩擦材組成物は、従来品と比較して、環境負荷の高い銅を用いなくとも高温・高速での制動における耐摩耗性、摩擦係数の安定性に優れるため、該摩擦材組成物は乗用車用ブレーキパッド等の摩擦材及び摩擦部材に好適である。 The friction material composition of the present invention is excellent in the wear resistance and the stability of the coefficient of friction in braking at high temperature and high speed without using copper having high environmental load as compared with the conventional product, so the friction material composition Is suitable for friction materials and friction members such as brake pads for passenger cars.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005036157A (en) * | 2003-07-18 | 2005-02-10 | Akebono Brake Ind Co Ltd | Friction material |
| US20070219289A1 (en) * | 2006-03-15 | 2007-09-20 | Federal-Mogul World Wide, Inc. | Friction Material |
| JP2012255052A (en) * | 2011-06-07 | 2012-12-27 | Hitachi Chemical Co Ltd | Non-asbestos friction material composition |
| JP2012255051A (en) * | 2011-06-07 | 2012-12-27 | Hitachi Chemical Co Ltd | Non-asbestos friction material composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005036157A (en) * | 2003-07-18 | 2005-02-10 | Akebono Brake Ind Co Ltd | Friction material |
| US20070219289A1 (en) * | 2006-03-15 | 2007-09-20 | Federal-Mogul World Wide, Inc. | Friction Material |
| JP2012255052A (en) * | 2011-06-07 | 2012-12-27 | Hitachi Chemical Co Ltd | Non-asbestos friction material composition |
| JP2012255051A (en) * | 2011-06-07 | 2012-12-27 | Hitachi Chemical Co Ltd | Non-asbestos friction material composition |
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