WO2020059005A1 - Friction material, friction material composition, friction material composition for lower-layer material, lower-layer material, and vehicle - Google Patents
Friction material, friction material composition, friction material composition for lower-layer material, lower-layer material, and vehicle Download PDFInfo
- Publication number
- WO2020059005A1 WO2020059005A1 PCT/JP2018/034374 JP2018034374W WO2020059005A1 WO 2020059005 A1 WO2020059005 A1 WO 2020059005A1 JP 2018034374 W JP2018034374 W JP 2018034374W WO 2020059005 A1 WO2020059005 A1 WO 2020059005A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- friction
- material composition
- friction material
- underlining
- mass
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 249
- 239000002783 friction material Substances 0.000 title claims abstract description 171
- 239000000203 mixture Substances 0.000 title claims abstract description 149
- 229910052751 metal Inorganic materials 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 41
- 238000000465 moulding Methods 0.000 claims abstract description 19
- 238000000227 grinding Methods 0.000 claims abstract description 9
- 239000000835 fiber Substances 0.000 claims description 102
- 239000010949 copper Substances 0.000 claims description 47
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 46
- 229910052802 copper Inorganic materials 0.000 claims description 46
- 239000002245 particle Substances 0.000 claims description 34
- 239000011256 inorganic filler Substances 0.000 claims description 24
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 24
- 239000012766 organic filler Substances 0.000 claims description 21
- 239000011230 binding agent Substances 0.000 claims description 19
- 239000003365 glass fiber Substances 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 8
- 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 claims description 7
- 229910052863 mullite Inorganic materials 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- 229940090961 chromium dioxide Drugs 0.000 claims description 5
- 229940117975 chromium trioxide Drugs 0.000 claims description 5
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 5
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 claims description 5
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 claims description 5
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 claims description 5
- 239000002223 garnet Substances 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 2
- 239000010931 gold Substances 0.000 claims 2
- 229910052737 gold Inorganic materials 0.000 claims 2
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 50
- 239000005011 phenolic resin Substances 0.000 description 25
- 229910052742 iron Inorganic materials 0.000 description 21
- 239000002585 base Substances 0.000 description 18
- 239000002557 mineral fiber Substances 0.000 description 18
- 238000005299 abrasion Methods 0.000 description 17
- 244000226021 Anacardium occidentale Species 0.000 description 14
- 235000020226 cashew nut Nutrition 0.000 description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 13
- 239000012784 inorganic fiber Substances 0.000 description 12
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 11
- 239000010439 graphite Substances 0.000 description 11
- 229910002804 graphite Inorganic materials 0.000 description 11
- 239000010456 wollastonite Substances 0.000 description 11
- 229910052882 wollastonite Inorganic materials 0.000 description 11
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 10
- 230000007423 decrease Effects 0.000 description 10
- 230000006866 deterioration Effects 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 10
- 239000005060 rubber Substances 0.000 description 10
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 8
- 239000000920 calcium hydroxide Substances 0.000 description 8
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- 239000011521 glass Substances 0.000 description 8
- 229920001568 phenolic resin Polymers 0.000 description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 7
- 239000004917 carbon fiber Substances 0.000 description 7
- 238000013016 damping Methods 0.000 description 7
- 150000002989 phenols Chemical class 0.000 description 7
- 239000000843 powder Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 229910000881 Cu alloy Inorganic materials 0.000 description 6
- 229920000459 Nitrile rubber Polymers 0.000 description 6
- 229920006231 aramid fiber Polymers 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 5
- 239000010425 asbestos Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229910052895 riebeckite Inorganic materials 0.000 description 5
- 229910000640 Fe alloy Inorganic materials 0.000 description 4
- 229910004298 SiO 2 Inorganic materials 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000002657 fibrous material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 4
- -1 triiron tetroxide Chemical compound 0.000 description 4
- 206010007269 Carcinogenicity Diseases 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 230000007670 carcinogenicity Effects 0.000 description 3
- 231100000260 carcinogenicity Toxicity 0.000 description 3
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 230000001788 irregular Effects 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229920000877 Melamine resin Polymers 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 2
- 229920000800 acrylic rubber Polymers 0.000 description 2
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 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
- 239000000919 ceramic Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001727 in vivo Methods 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 239000011135 tin Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 229910001928 zirconium oxide Inorganic materials 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 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
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 239000005749 Copper compound Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 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
- 239000005083 Zinc sulfide Substances 0.000 description 1
- 239000002253 acid 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 229910000287 alkaline earth metal oxide Inorganic materials 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
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- CSSYLTMKCUORDA-UHFFFAOYSA-N barium(2+);oxygen(2-) Chemical class [O-2].[Ba+2] CSSYLTMKCUORDA-UHFFFAOYSA-N 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate 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
- ZHZFKLKREFECML-UHFFFAOYSA-L calcium;sulfate;hydrate Chemical compound O.[Ca+2].[O-]S([O-])(=O)=O ZHZFKLKREFECML-UHFFFAOYSA-L 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 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
- 150000001875 compounds Chemical class 0.000 description 1
- 150000001880 copper compounds Chemical class 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
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000003703 image analysis method Methods 0.000 description 1
- 231100000824 inhalation exposure Toxicity 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007912 intraperitoneal administration Methods 0.000 description 1
- 150000002506 iron compounds Chemical class 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- OBTSLRFPKIKXSZ-UHFFFAOYSA-N lithium potassium Chemical compound [Li].[K] OBTSLRFPKIKXSZ-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 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
- 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
- 230000013011 mating Effects 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier 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
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000006259 organic additive Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- AFNRRBXCCXDRPS-UHFFFAOYSA-N tin(ii) sulfide Chemical compound [Sn]=S AFNRRBXCCXDRPS-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000005740 tumor formation Effects 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
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/14—Anti-slip materials; Abrasives
-
- 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
Definitions
- the present invention relates to a friction member, a friction material composition, a friction material composition for an underlining material, an underlining material, and a vehicle.
- the disk brake is a device in which a disk rotor that rotates integrally with wheels during traveling is sandwiched between brake pads, and a braking force is generated by frictional force generated at that time.
- Drum brakes are, for example, those in which a brake lining (also called a brake shoe) is mounted inside a drum installed inside wheels, and exerts a braking force by pressing it from inside to outside. It is.
- a friction material is provided on a brake pad of a disc brake and a brake lining of a drum brake, and the friction material rubs against a facing material such as a disc rotor and a drum to convert the kinetic energy of a vehicle or the like into thermal energy, thereby braking. I do. Therefore, the friction material is required to have a good friction coefficient, abrasion resistance (the life of the friction material is long), strength, vibration damping property (there is no occurrence of brake squeal), and the like.
- an object of the present invention is to provide a friction material composition (particularly, a friction material composition for a subbing material) capable of exhibiting excellent friction performance while improving shear strength, crack resistance, and wear resistance at normal and high temperatures. Object), and a subbing material formed by molding the friction material composition, a friction member having the subbing material, and a vehicle equipped with the underlining material or the friction member.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, if a friction material composition containing a predetermined amount of a grinding material having a specific Mohs hardness (particularly, a friction material composition for underlining material), The inventors have found that the above-mentioned problems can be solved, and have completed the present invention. The present invention has been completed based on such findings.
- the present invention relates to the following [1] to [19].
- a friction member having an upper material, a lower material and a backing metal in this order, wherein the lower material contains a grinding material having a Mohs hardness of 6.5 or more.
- the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, ⁇ -alumina, silicon carbide, and quartz sand.
- the friction member according to any one of [3] to [3].
- the underlaying material further contains at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder. Friction member.
- the present invention can provide a friction material containing a subbing material obtained by molding a material composition, and a friction member having the subbing material.
- FIG. 3 is a schematic view illustrating one embodiment of the friction member of the present invention.
- the components are not essential unless otherwise specified.
- the upper limit or the lower limit of the numerical range may be replaced with the value shown in the embodiment.
- the content of each component in the underlining material or the friction material composition for the underlining material when there are a plurality of types of substances corresponding to each component, unless otherwise specified, It means the total content of the plurality of types of substances present in the material friction material composition.
- embodiments in which the items described in this specification are arbitrarily combined are also included in the present invention.
- the present invention is a friction member having an upper material, a lower material, and a backing metal in this order, wherein the lower material contains a grinding material having a Mohs hardness of 6.5 or more.
- the Mohs 'hardness is measured by comparing the susceptibility to damage with "a standard substance having a Mohs' hardness of 1 to 10", and more specifically, a value obtained by the method described in Examples. .
- the friction material composition particularly used for the underlining material (hereinafter, referred to as the friction material composition for the underlining material) will be described in detail.
- the present invention also provides an underlining material formed by molding the underlining material friction material composition, and each component that can be contained in the “underlining material friction material composition” is included in the “underlining material”. It is a component to be obtained.
- the description about each component in the “friction material composition for underlining material” described below can be read as the description about each component in the “underlining material”.
- the friction material composition for underlining material used in the present invention is a friction material composition for underlining material containing a grinding material having a Mohs hardness of 6.5 or more.
- a preferred embodiment of the friction material composition for underlining material used in the present invention is selected from the group consisting of an organic filler, an inorganic filler, a fiber base material and a binder together with the abrasive having a Mohs hardness of 6.5 or more.
- a friction material composition for an underlaying material containing at least one kind, and a more preferred embodiment further contains an organic filler, an inorganic filler, a fiber base material, and a binder together with the abrasive having a Mohs hardness of 6.5 or more.
- a friction material composition for an underlaying material is a friction material composition for underlining material containing a grinding material having a Mohs hardness of 6.5 or more.
- a preferred embodiment of the friction material composition for underlining material used in the present invention is selected from the group consisting of an
- a friction material containing copper or a copper alloy is advantageous for the strength of the friction material.
- a friction material containing copper or a copper alloy contains copper as wear powder generated by braking. It has been suggested that it causes pollution of rivers, lakes and oceans due to its large amount, and the use of copper components in friction materials (overlaying materials) has been reduced mainly in the United States, especially California and Washington. Restricting laws are in place. Therefore, in order to be a friction material that can be used in other countries including the United States, it is necessary to not contain copper or to significantly reduce the content of copper. Commercial value is poor.
- the friction material composition for underlining material of the present invention does not contain copper, but when copper is contained, the content of copper in the friction material composition for underlining material is 0.5 mass% as a copper element. By setting it to less than%, even if it is released as abrasion powder into the environment, it is possible to prevent pollution of rivers and the like.
- the copper content indicates the content of copper element (Cu) contained in fibrous and powdery copper, copper alloys and copper compounds in the entire friction material composition for underlining materials.
- the content of copper in the friction material composition for underlaying material is more preferably 0.2% by mass or less as a copper element, and further preferably 0.05% by mass or less.
- the friction material composition for underlining material of the present invention does not contain copper, or even if the content is less than 0.5% by mass as a copper element, the shear strength at normal temperature and high temperature is obtained. And crack resistance can be satisfied, and the abrasion resistance is also excellent.
- the iron-based metal is a metal containing iron as a main component and refers to general iron and steel. The iron content is determined based on the iron element (Fe) contained in iron, iron alloys, and iron compounds.
- the friction material composition for an underlining material of the present invention does not contain an iron-based metal.
- the content of the iron-based metal in the friction material composition for iron less than 0.5% by mass as an iron element, rust resistance can be improved, and rusting occurs at the bonding interface with the back metal. A decrease in durability can be suppressed.
- the content of the iron-based metal in the friction material composition for underlaying material is more preferably 0.2% by mass or less as an iron element, and further preferably 0.05% by mass or less.
- the friction material composition for underlining material of the present invention is classified as a NAO (Non-Asbestos-Organic) material, and is a so-called non-asbestos friction material composition (a friction material composition containing no asbestos or containing asbestos). Even when the friction material composition is used, the asbestos content is a very small amount.
- the content of asbestos is preferably 0.2% by mass or less, more preferably substantially 0% by mass.
- the friction material composition for underlining material of the present invention contains an abrasive having a Mohs hardness of 6.5 or more.
- a grinding material having a Mohs hardness of 6.5 or more has sufficient grinding performance on facing materials such as a disk rotor and a brake drum, so that the friction coefficient can be improved. Therefore, the friction material composition for underlining material of the present invention expresses excellent friction performance while improving shear strength, crack resistance and wear resistance at ordinary temperature and high temperature.
- the Mohs hardness of the abrasive is preferably 6.7 or more, more preferably 7.0 or more.
- the upper limit of the Mohs hardness of the abrasive is not particularly limited, but is usually 10 or less, may be 9.5 or less, or may be 8.0 or less.
- the abrasive one kind may be used alone, or two or more kinds may be used in combination.
- the abrasive having a Mohs hardness of 6.5 or more include, for example, chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, ⁇ -alumina, silicon carbide, and fine sand.
- at least one of them is used.
- at least one selected from the group consisting of zirconium silicate, mullite and ⁇ -alumina is preferable.
- the shape of the abrasive is not particularly limited, and examples thereof include a sphere, a column, a polygon, a needle, and an irregular shape. Among these, spherical, polygonal, acicular, and irregular shapes are preferred, and polygonal and irregular shapes are more preferred.
- the average particle size of the abrasive is preferably 0.5 to 250 ⁇ m, more preferably 0.5 to 200 ⁇ m, still more preferably 1 to 170 ⁇ m, or 0.5 to 100 ⁇ m, or 0 to 100 ⁇ m. It may be 5 to 50 ⁇ m, 0.5 to 10 ⁇ m, 0.5 to 7 ⁇ m, 3 to 200 ⁇ m, or 100 to 200 ⁇ m. It may be 130 to 170 ⁇ m.
- the average particle diameter means a value of d50 (median diameter of volume distribution, cumulative median value) measured using a laser diffraction particle size distribution measuring method, and the same applies hereinafter. For example, it can be measured with a laser diffraction / scattering type particle size distribution analyzer, trade name: LA.920 (manufactured by Horiba, Ltd.). In the case of a commercially available product, catalog values can be referred to as the average particle size.
- the content of the abrasive is from 0.1 to 8.5 parts by mass based on 100 parts by mass of the friction material composition for underlining material of the present invention, from the viewpoints of shear strength, crack resistance, and wear resistance at room temperature and high temperature.
- the content may be 0.1 to 5 parts by mass, 0.1 to 3 parts by mass, 1 to 8.5 parts by mass, or 4 to 8 parts by mass. It may be 0.5 parts by mass.
- the amount is 0.1 parts by mass or more, the friction coefficient tends to be improved.
- the amount is 8.5 parts by mass or less, the aggressiveness to the facing material is reduced, the abrasion resistance is deteriorated, and the friction coefficient is reduced. An excessive rise tends to be suppressed.
- the organic filler can exhibit a function as a friction modifier for improving the vibration damping property and the wear resistance.
- the organic filler does not include a fibrous material (for example, an organic fiber described later).
- One kind of the organic filler may be used alone, or two or more kinds may be used in combination.
- an organic filler generally used in a friction material composition can be used, and examples thereof include cashew particles, rubber, and melamine dust. Among these, cashew particles and rubber are preferable from the viewpoint of improving the stability of the coefficient of friction and the abrasion resistance and suppressing the squeal. Further, as the organic filler, cashew particles and rubber may be used in combination, or cashew particles coated with rubber may be used.
- the cashew particles are obtained by pulverizing hardened cashew nut shell oil and may be generally referred to as cashew dust.
- Cashew particles are generally classified into brown, brown-black, black, and the like, depending on the type of curing agent used in the curing reaction.
- the average particle size of the cashew particles is preferably 850 ⁇ m or less, more preferably 750 ⁇ m or less, and even more preferably 600 ⁇ m or less, from the viewpoint of dispersibility.
- the lower limit of the average particle size of the cashew particles is not particularly limited, and may be 200 ⁇ m or more, 300 ⁇ m or more, or 400 ⁇ m or more.
- One type of cashew particles may be used alone, or two or more types may be used in combination.
- the content is preferably 0.5 to 15 parts by mass, more preferably 0.5 parts by mass, based on 100 parts by mass of the friction material composition for underlining material.
- the amount is 1 to 10 parts by mass, more preferably 2 to 5 parts by mass.
- the amount By setting the amount to 0.5 parts by mass or more with respect to 100 parts by mass of the friction material composition for the underlining material, the elastic modulus of the underlining material tends to increase, and furthermore, the vibration damping property such as squealing deteriorates and the abrasion resistance decreases. Deterioration tends to be avoided.
- the amount when the amount is 15 parts by mass or less with respect to 100 parts by mass of the friction material composition for an underlaying material, the heat resistance and the crack resistance tend to be prevented from lowering.
- Examples of the rubber include those commonly used in friction material compositions, such as natural rubber and synthetic rubber.
- Examples of the synthetic rubber include acrylonitrile-butadiene rubber (NBR), acrylic rubber, isoprene rubber, and polybutadiene rubber. (BR), styrene-butadiene rubber (SBR), silicone rubber, pulverized powder of tire tread rubber, and the like.
- NBR acrylonitrile-butadiene rubber
- NBR acrylonitrile-butadiene rubber
- SBR styrene-butadiene rubber
- silicone rubber silicone rubber
- pulverized powder of tire tread rubber and the like.
- acrylonitrile-butadiene rubber (NBR) and pulverized powder of tire tread rubber are preferable from the viewpoint of balance between heat resistance, flexibility and production cost.
- the content of the rubber is preferably 1 to 30 parts by mass, more preferably 2 to 15 parts by mass, still more preferably 2 to 10 parts by mass, particularly preferably 100 parts by mass of the friction material composition for underlining material. It is 2 to 6 parts by mass.
- the total content is preferably 1 to 20 parts by mass, more preferably 1 to 10 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. Parts by mass, more preferably 2 to 8 parts by mass, particularly preferably 3 to 8 parts by mass.
- the inorganic filler can exhibit a function as a friction adjusting material for avoiding deterioration of the heat resistance, abrasion resistance, stability of friction coefficient and the like of the underlining material.
- the inorganic filler does not include a fibrous material (for example, an inorganic fiber described later) and the abrasive having the Mohs hardness of 6.5 or more.
- a fibrous material for example, an inorganic fiber described later
- the inorganic filler one type may be used alone, or two or more types may be used in combination.
- the inorganic filler is not particularly limited, and may be an inorganic filler usually used for an underlay material.
- the inorganic filler examples include metal sulfides such as antimony trisulfide, tin sulfide, molybdenum disulfide, bismuth sulfide, and zinc sulfide; and titanium such as potassium titanate, lithium potassium titanate, sodium titanate, and potassium magnesium titanate.
- metal sulfides such as antimony trisulfide, tin sulfide, molybdenum disulfide, bismuth sulfide, and zinc sulfide
- titanium such as potassium titanate, lithium potassium titanate, sodium titanate, and potassium magnesium titanate.
- Acid salts mica, graphite, coke, calcium hydroxide, calcium oxide, sodium carbonate, calcium carbonate, magnesium carbonate, barium sulfate, dolomite, coke, mica, vermiculite, calcium sulfate, talc, clay, zeolite, chromite, zirconium oxide, Titanium oxide, magnesium oxide, triiron tetroxide, zinc oxide, ⁇ -alumina; iron powder, cast iron powder, aluminum powder, nickel powder, tin powder, zinc powder, and an alloy containing at least one of the above metals Metals such as powder End, and the like, but is preferably one not containing copper and iron metal.
- At least one selected from the group consisting of metal sulfides, titanates, mica, graphite, calcium hydroxide and barium sulfate is preferred, and is selected from the group consisting of graphite, calcium hydroxide and barium sulfate. At least one is more preferable, and it is further preferable to use graphite, calcium hydroxide, and barium sulfate in combination.
- calcium hydroxide, sodium carbonate and zinc oxide are preferred from the viewpoint of suppressing rusting of the underlay material.
- calcium hydroxide increases the pH of the underlaying material, and since the aramid fiber tends to be easily decomposed, it is preferable to pay attention to the amount used so that the pH does not become too high when used, for example,
- the content of calcium hydroxide is preferably 0.5 to 10 parts by mass, more preferably 1 to 8 parts by mass, based on 100 parts by mass of the friction material composition for underlining materials. It is part by mass, more preferably 1 to 5 parts by mass.
- the graphite is not particularly limited, and any known graphite, that is, any of natural graphite and artificial graphite can be used.
- the graphite preferably has an average particle diameter of 1 to 50 ⁇ m, more preferably 2 to 40 ⁇ m, further preferably 5 to 30 ⁇ m, and particularly preferably 10 to 20 ⁇ m.
- the average particle diameter of the graphite is 1 ⁇ m or more, the thermal conductivity of the underlay material is suppressed from excessively increasing, and the frictional heat tends to be transferred to the back plate side to easily suppress the occurrence of vapor lock. is there.
- the thickness is 20 ⁇ m or less, the thermal conductivity of the underlay material is improved, the curing of the binder at the time of molding is promoted, and the strength tends to be excellent.
- graphite having an average particle size outside the above range may be used.
- the content is preferably 2 to 20 parts by mass, more preferably 3 to 15 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. More preferably, it is 3 to 10 parts by mass.
- the upper limit of the graphite content may be 8 parts by mass.
- the friction material composition for underlining material of the present invention contains barium sulfate, the content thereof is not particularly limited, and the total amount of the friction material composition for underlining material is 100 in accordance with the blending amount of other components. It corresponds to the "remainder" for adjusting to parts by mass.
- the total content is preferably 20 to 75 parts by mass, more preferably 100 parts by mass of the friction material composition for underlining material.
- the amount is 30 to 70 parts by mass, more preferably 40 to 65 parts by mass, particularly preferably 40 to 60 parts by mass.
- the fibrous base material has a reinforcing effect on the underlay material.
- the friction material composition for underlining material of the present invention preferably contains an organic fiber and an inorganic fiber as a fiber base material.
- One type of fiber base material may be used alone, or two or more types may be used in combination.
- Inorganic fibers can exhibit the effect of improving the mechanical strength and wear resistance of the underlay material.
- the organic fiber is a fibrous material containing an organic substance as a main component.
- the organic fiber examples include hemp, cotton, aramid fiber, cellulose fiber, acrylic fiber, and phenol resin fiber (having a crosslinked structure).
- One type of organic fiber may be used alone, or two or more types may be used in combination.
- an aramid fiber is preferable from the viewpoint of heat resistance.
- the organic fibers contain fibrillated organic fibers, and it is more preferable that they contain fibrillated aramid fibers.
- the fibrillated organic fiber is an organic fiber that has been split and has fluff, and is commercially available.
- the friction material composition for underlining material of the present invention may contain other organic fibers together with the fibrillated organic fibers.
- the content is 1 to 8 parts by mass based on 100 parts by mass of the friction material composition for underlining material. Preferably, it is 2 to 7 parts by mass, more preferably 1 to 5 parts by mass.
- the organic fibers (fibrillated organic material) in the friction material composition for underlining material are used. There is a tendency that the deterioration of shear strength and crack resistance due to uneven distribution of the fibers and other materials can be effectively suppressed.
- the inorganic fiber examples include glass fiber, fibrous wollastonite, metal fiber, mineral fiber, carbon fiber, ceramic fiber, biodegradable ceramic fiber, rock wool, potassium titanate fiber, silica alumina fiber, and flame resistant fiber. Is mentioned.
- the inorganic fiber is preferably a fibrous material mainly containing an inorganic substance other than a metal and a metal alloy.
- One type of inorganic fiber may be used alone, or two or more types may be used in combination.
- Glass fiber refers to a fiber produced by melting and spinning glass.
- a glass fiber whose raw material is E glass, C glass, S glass, D glass, or the like can be used.
- a glass containing E glass or S glass from the viewpoint of particularly high strength.
- fibers are used.
- glass fibers obtained by treating the surfaces of glass fibers with aminosilane, epoxysilane, or the like are preferable for improving the affinity with the binder.
- a glass fiber obtained by converging a glass fiber with a urethane resin, an acrylic resin, a phenol resin or the like can be used.
- the number is preferably 50 to 500 from the viewpoint of the balance between dispersibility and handleability.
- the average fiber length of the glass fiber is not particularly limited, but is preferably from 80 to 6,000 ⁇ m, more preferably from 150 to 5,000 ⁇ m, still more preferably from 300 to 5,000 ⁇ m, and particularly preferably from 1,000 to 1,000 ⁇ m. 5,000 ⁇ m, and most preferably 2,000-4,000 ⁇ m. If the average fiber length is 80 ⁇ m or more, the strength of the underlay material tends to be improved, and if it is 6,000 ⁇ m or less, the decrease in dispersibility tends to be suppressed.
- the average fiber diameter of the glass fiber is preferably 5 to 20 ⁇ m, more preferably 7 to 15 ⁇ m.
- the average fiber length and the average fiber diameter respectively, randomly select 50 inorganic fibers to be used, measure the fiber length and the fiber diameter with an optical microscope, and show the average value obtained therefrom, If so, you can refer to the catalog value.
- a fiber diameter points out the diameter of a fiber.
- the content is preferably 1 to 15 parts by mass, more preferably 1 to 15 parts by mass, based on 100 parts by mass of the friction material composition for underlining material.
- the amount is 12 parts by mass, more preferably 1 to 10 parts by mass.
- the fibrous wollastonite refers to one obtained by pulverizing and classifying a naturally occurring silicate mineral mainly composed of CaSiO 3 and processing it into a fibrous form.
- the average aspect ratio (average fiber length / average fiber diameter) of the fibrous wollastonite used in the present invention is preferably 8 or more, more preferably 8 to 20, further preferably 9 to 20, and particularly preferably 10 to 20. Eighteen. By setting the average aspect ratio to 8 or more, there is a tendency that the shear strength and the crack resistance at room temperature and high temperature of the underlay material can be effectively improved.
- the average aspect ratio means a d50 value (cumulative median value of the volume distribution), and can be measured by, for example, a dynamic image analysis method.
- the fibrous wollastonite is preferably used in combination with glass fibers from the viewpoint of shear strength at normal and high temperatures, crack resistance and abrasion resistance.
- the average fiber length of the fibrous wollastonite is preferably from 20 to 1,000 ⁇ m, more preferably from 40 to 850 ⁇ m, and still more preferably from 100 to 850 ⁇ m, from the viewpoint of imparting strength to the underlaying material.
- the average fiber diameter of the fibrous wollastonite is preferably 70 ⁇ m or less, more preferably 60 ⁇ m or less, from the viewpoint of imparting strength to the underlaying material.
- the lower limit of the average fiber diameter is not particularly limited, but is preferably 5 ⁇ m or more, more preferably 8 ⁇ m or more.
- the surface of the fibrous wollastonite may be treated with aminosilane, epoxysilane, or the like.
- the content is preferably 2 to 30 parts by mass, more preferably 100 parts by mass of the friction material composition for underlining material. Is from 3 to 25 parts by mass, more preferably from 5 to 25 parts by mass, particularly preferably from 5 to 20 parts by mass. If the amount is 2 parts by mass or more, the fibrous wollastonite is dispersed in the underlining material, and the strength of the underlining material tends to be improved. When the amount is 30 parts by mass or less, a decrease in the handleability of the friction material composition for underlining material after mixing with the fibrous substance tends to be suppressed.
- the metal fibers include fibers in the form of a single metal or alloy such as aluminum, iron, zinc, tin, titanium, nickel and magnesium, and fibers mainly containing a metal such as cast iron.
- the alloy-type fiber include an iron alloy fiber and an aluminum alloy fiber.
- One type of metal fiber may be used alone, or two or more types may be used in combination.
- a friction material composition for a subbing material containing no metal fibers is preferable. From the viewpoint of improving strength, stabilizing the coefficient of friction, improving thermal conductivity, and improving crack resistance and wear resistance, copper fibers, copper alloy fibers, iron fibers and iron alloy fibers are generally preferred. .
- the content of copper in the friction material composition for underlaying material is 0.5 mass% as a copper element. %, Preferably 0.3% by mass or less, more preferably 0.1% by mass or less, and further preferably substantially contains no copper.
- a copper alloy fiber a copper fiber, a brass fiber, a bronze fiber, etc. are mentioned.
- the content of iron in the friction material composition for underlining material is preferably less than 0.5% by mass, more preferably 0.3% by mass or less, further preferably 0.1% by mass or less, and particularly preferably substantially no iron.
- the mineral fibers are artificial inorganic fibers melt-spun with blast furnace slag such as slag wool, basalt such as basalt fiber, and other natural rocks as main components.
- the mineral fiber include a mineral fiber containing SiO 2 , Al 2 O 3 , CaO, MgO, FeO, Na 2 O, etc., or a mineral fiber containing one or more of these compounds.
- a mineral fiber containing an aluminum element is preferred, a mineral fiber containing Al 2 O 3 is more preferred, and a mineral fiber containing Al 2 O 3 and SiO 2 is even more preferred.
- the shear strength tends to decrease as the average fiber length of the mineral fibers included in the friction material composition for underlining materials increases.
- the average fiber length of the mineral fibers is preferably 500 ⁇ m or less, more preferably 100 to 400 ⁇ m, and further preferably 120 to 340 ⁇ m.
- the average fiber diameter (diameter) of the mineral fibers is not particularly limited, but is usually 1 to 20 ⁇ m, and may be 2 to 15 ⁇ m.
- the mineral fibers are preferably biosoluble from the viewpoint of harmful effects on the human body.
- biosoluble mineral fiber refers to a mineral fiber that has the characteristic of being partially decomposed in a short time and discharged out of the body even when taken into the human body.
- the chemical composition is such that the total amount of alkali oxides and alkaline earth oxides (total amount of sodium, potassium, calcium, magnesium and barium oxides) is 18% by mass or more, and (a) short-term inhalation
- the half-life of a fiber having a length of more than 20 ⁇ m is less than 10 days in an in vivo durability test by exposure, and (b) a half-life of a fiber having a length of more than 20 ⁇ m in an in vivo durability test by short-term intratracheal injection. Less than 40 days, (c) no significant carcinogenicity in the intraperitoneal administration test, or (d) no pathological findings or tumor formation associated with carcinogenicity in the long-term inhalation exposure test.
- biodegradable mineral fibers include SiO 2 —Al 2 O 3 —CaO—MgO—FeO (—K 2 O—Na 2 O) fibers and the like, and include SiO 2 , Al 2 O 3 , and CaO. , MgO, FeO, K 2 O, Na 2 O and the like.
- the friction material composition for underlining material of the present invention contains mineral fibers
- its content is preferably 3 to 40% by mass, and more preferably 8 to 30% by mass in the friction material composition for underlining material. More preferably, it is 10 to 30% by mass, particularly preferably 10 to 20% by mass.
- Examples of the carbon fibers include flame-resistant fibers, pitch-based carbon fibers, PAN-based carbon fibers, and activated carbon fibers.
- One type of carbon fiber may be used alone, or two or more types may be used in combination.
- the average fiber length of the carbon fibers is not particularly limited, but is preferably 0.1 to 6.0 mm, and more preferably 0.1 to 3.0 mm. When the average fiber length is in the above range, the underlay material is not easily chipped and the strength tends to be easily maintained.
- the average fiber diameter of the carbon fibers is not particularly limited, but is preferably 5 to 20 ⁇ m.
- the content is preferably 5 to 40 parts by mass, more preferably 5 to 20 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. Parts, more preferably 5 to 15 parts by mass.
- the binder has a function of binding and integrating an organic filler, an inorganic filler, a fiber base material, and the like, which can be included in the friction material composition for an underlining material, and giving a predetermined shape and strength.
- the binder contained in the friction material composition for underlining material of the present invention is not particularly limited, but a thermosetting resin generally used as a binding material for underlining material can be used.
- the thermosetting resin include a phenol resin, a modified phenol resin, an elastomer-dispersed phenol resin, an epoxy resin, a polyimide resin, and a melamine resin.
- examples of the modified phenol resin include an acrylic-modified phenol resin, a silicone-modified phenol resin, a cashew-modified phenol resin, an epoxy-modified phenol resin, and an alkylbenzene-modified phenol resin.
- examples of the elastomer-dispersed phenolic resin include a nitrile-butadiene elastomer-dispersed phenolic resin such as an acrylic elastomer-dispersed phenolic resin and a silicone elastomer-dispersed phenolic resin.
- phenolic resin acrylic-modified phenolic resin, silicone-modified phenolic resin, alkylbenzene-modified phenolic resin, acryl-elastomer-dispersed phenolic resin, silicone-elastomer-dispersed phenolic resin, and nitrile-butadiene elastomer provide good heat resistance, moldability and friction coefficient.
- a dispersed phenol resin is preferred, a phenol resin, an acrylic elastomer dispersed phenol resin, a silicone elastomer dispersed phenol resin, and a nitrile butadiene elastomer dispersed phenol resin are more preferred, and a phenol resin is even more preferred.
- One thermosetting resin may be used alone, or two or more thermosetting resins may be used in combination.
- the content is preferably 5 to 25 parts by mass, more preferably 5 to 20 parts by mass with respect to 100 parts by mass of the friction material composition for underlining material. More preferably, it is 6 to 18 parts by mass, particularly preferably 8 to 16 parts by mass.
- the friction material composition for underlaying material of the present invention may further contain other materials as required in addition to the above-mentioned abrasive having an Mohs hardness of 6.3 or more, an organic filler, an inorganic filler, a fiber base material and a binder. can do.
- examples of other materials include organic additives such as metal powders such as zinc powder and aluminum; and fluorine-based polymers such as polytetrafluoroethylene (PTFE), from the viewpoint of improving abrasion resistance and thermal fade characteristics. .
- the content may be an organic filler, an inorganic filler, a fiber base material, a abrasive having a Mohs hardness of 6.3 or more, and a binder. Is preferably not more than 20 parts by mass, more preferably not more than 10 parts by mass, further preferably not more than 5 parts by mass, particularly preferably not more than 3 parts by mass with respect to 100 parts by mass of the total amount of You do not have to.
- the friction material composition for an upholstery material and the friction material composition for an underlay material of the present invention are molded by a generally used method, preferably by heat and pressure molding.
- the upholstery material (generally, simply referred to as a friction material) 1 and the lower lining material 2 can be integrated.
- a friction material composition for an overlay a known friction material composition, in particular, a friction material composition for an overlay can be used, and there is no particular limitation.
- Specific examples of the friction material composition for an overlay material include a friction material composition for an overlay material containing an organic filler, an inorganic filler, a fiber base material, and a binder.
- the friction material composition preferably does not contain copper, or even if it contains copper, the content of copper is preferably less than 0.5% by mass as a copper element.
- the organic filler, the inorganic filler, the fiber base material, and the binder the same ones as described in the friction material composition for the underlay material can be used.
- the ratio of the thickness of the underlining material to the total thickness of the uppering material (friction material) 1 and the underlining material 2 is preferably 3 to 70%, and more preferably 5 to 60%. More preferably, it is still more preferably 6 to 50%.
- the friction material composition for an overlay material and the friction material composition for an underlay material of the present invention are separately prepared by using a Reidige mixer (“Redige” is a registered trademark), a pressure kneader, an Erich mixer ( “Eirich” is a registered trademark) mixed using a mixer such as, the mixture for the upper material and the mixture for the lower material are preformed integrally in a molding die, and then, the obtained preformed product is, for example, Molding is performed at a molding temperature of 130 to 160 ° C. under a molding pressure of 20 to 50 MPa for 2 to 10 minutes, and the obtained molded product is heat-treated at, for example, 150 to 250 ° C.
- the mixture may be directly thermoformed without the preforming step.
- the friction material composition for underlining material of the present invention has excellent friction performance while improving shear strength, crack resistance and abrasion resistance at ordinary temperature and high temperature, It can be used as the underlining material 2 of the friction member 5.
- the upper lining material (friction material) 1 is a friction material serving as a friction surface of the friction member
- the lower lining material 2 is formed of the upper lining material (friction material) 1 serving as the friction surface of the friction member and the back metal 3. It is a layer interposed therebetween for the purpose of improving the shear strength and crack resistance near the bonding portion between the overlay material (friction material) 1 and the back metal 3.
- the present invention provides an underlining material friction material composition of the present invention between an overlining material (friction material) 1, a backing metal 3, and the overlining material (frictional material) 1 and the backing metal 3. Also provided is a friction member 5 having a base material 2 formed by molding.
- the friction member of the present invention is a friction member formed by using the underlining material of the present invention so that the upper surface becomes a friction surface, that is, the friction member in which the underlining material is located on the opposite side to the friction surface. It is.
- the friction member of the present invention is not limited to the above-described embodiment, and includes, for example, (1) an upper lining material (friction material) 1, a back metal 3, and a lower lining material 2.
- the back metal 3 and the underlining material 2 are provided. And a friction member or the like in which a primer layer for the purpose of surface modification for enhancing the adhesion effect of the back metal 3 is interposed. Further, (3) a friction member having a shim 4 on a side opposite to a side having the underlining material 2 in the back metal 3 in the friction member 5 having the configuration of the above (1) or (2) is also included.
- the shim 4 is a spacer generally used for improving the vibration damping of the friction member.
- the back metal is usually used as a friction member to improve the mechanical strength of the friction member, and a metal or a fiber-reinforced plastic can be used as a material.
- a metal or a fiber-reinforced plastic can be used as a material.
- the back metal include iron, aluminum alloy, stainless steel, inorganic fiber reinforced plastic, carbon fiber reinforced plastic, and the like.
- the primer layer and the adhesive layer may be any layers that are generally used for friction members such as brake shoes.
- the friction member of the present invention can be used as a friction member for a disc brake pad of an automobile or the like and a friction member for a brake lining of an automobile or the like. Further, the friction material composition for an overlay material and the friction material composition for an underlay material of the present invention are subjected to molding, processing, pasting, and the like into a target shape, so that the friction of a clutch facing, an electromagnetic brake, a holding brake, etc. It can also be used as a member.
- the friction member of the present invention has an excellent friction performance while the underlining material has good shear strength at normal and high temperatures, crack resistance and wear resistance, and is particularly suitable as a friction member for vehicles. is there.
- the present invention also provides a vehicle equipped with the friction member of the present invention.
- a vehicle equipped with the friction member of the present invention.
- Examples of the car include large cars, medium cars, ordinary cars, large special cars, small special cars, large motorcycles and ordinary motorcycles.
- C Cracks were generated on the friction surface of the friction material or on the surface of the underlaying material to such an extent that a thickness gauge of 0.1 mm could enter.
- the evaluation is C.
- Examples 1 to 4 and Comparative Examples 1 to 3 (Production of disc brake pad) Each component was blended according to the blending amounts shown in Table 1 to obtain a friction material composition for an upholstery material. Further, the respective components were blended in accordance with the blending amounts shown in Table 2 to obtain a friction material composition for an underlining material.
- the friction material composition for the overlay material and the friction material composition for the underlay material are separately mixed with a Reidige mixer (manufactured by Matsubo Co., Ltd., trade name: Redige mixer M20), and the mixture for the overlay material is mixed with the mixture. A mixture for underlaying material was obtained.
- the obtained mixture for the overlay material and the mixture for the underlay material were integrally preformed by a molding press (manufactured by Oji Machine Co., Ltd.). Using a molding press (manufactured by Sanki Seiko Co., Ltd.) under conditions of a molding temperature of 140 to 160 ° C., a molding pressure of 30 MPa and a molding time of 5 minutes, an iron backing metal (manufactured by Hitachi Automotive Systems, Ltd.) Together with heat and pressure. The obtained molded article was heat-treated at 200 ° C. for 4.5 hours, polished using a rotary polisher, and scorched at 500 ° C. to obtain a disc brake pad.
- a molding press manufactured by Sanki Seiko Co., Ltd.
- an iron backing metal manufactured by Hitachi Automotive Systems, Ltd.
- the disc brake pads obtained in Examples and Comparative Examples had a back metal thickness of 6 mm, an upper material of 5.5 mm, a lower material of 5.5 mm, and a friction material projected area of 52 cm 2 .
- each measurement and evaluation were performed according to the above-described methods. Table 2 shows the results.
- the friction material composition for underlining material of the example When the friction material composition for underlining material of the example was used, excellent friction performance was exhibited while improving the shear strength, crack resistance and wear resistance at ordinary temperature and high temperature. In addition, since the friction material composition for underlining materials of the examples does not contain copper and iron-based metals (for example, copper fiber, iron fiber, etc.), it is a friction material having low environmental harmfulness and high rust suppression effect. It can be said that. On the other hand, when the friction material composition for underlining material of the comparative example was used, the friction coefficient was significantly reduced, and excellent friction performance could not be obtained.
- copper and iron-based metals for example, copper fiber, iron fiber, etc.
- the friction material composition for underlining material of the present invention has excellent friction performance while improving the shear strength at ordinary temperature and high temperature, crack resistance and abrasion resistance. It is suitable for underlining materials and friction members such as brake pads for passenger cars.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Provided is a friction material composition (particularly, a friction material composition for a lower-layer material) capable of exhibiting excellent friction performance while having favorable shear strength, crack resistance, and wear resistance at ordinary temperatures and high temperatures. Further provided are a lower-layer material formed by molding the friction material composition, a friction member having the lower-layer material, and a vehicle equipped with the lower-layer material or the friction member. Specifically, the friction member has an upper-layer material, a lower-layer material, and a backing metal, in this order, and the lower-layer material contains a grinding material having a Mohs hardness of 6.5 or more.
Description
本発明は、摩擦部材、摩擦材組成物、下張り材用摩擦材組成物、下張り材及び車に関する。
The present invention relates to a friction member, a friction material composition, a friction material composition for an underlining material, an underlining material, and a vehicle.
一般に自動車等が搭載するブレーキとしては、主にディスクブレーキとドラムブレーキの２つに大きく分けられる。ディスクブレーキは、走行中に車輪と一体になって回転するディスクロータをブレーキパッドで挟み、その際に発生する摩擦力によって制動力を発生させるものである。また、ドラムブレーキは、例えば、車輪の内側に設置されたドラムの内部にブレーキライニング（ブレーキシューとも称される。）が装着され、それを内側から外側へ圧着させることで制動力を発揮するものである。
ディスクブレーキのブレーキパッド及びドラムブレーキのブレーキライニングには摩擦材が設けられ、該摩擦材が、ディスクロータ、ドラム等の対面材と摩擦し、自動車等の運動エネルギーを熱エネルギーに変換することにより制動を行う。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。 Generally, brakes mounted on automobiles and the like are mainly divided into two main types, namely disc brakes and drum brakes. The disk brake is a device in which a disk rotor that rotates integrally with wheels during traveling is sandwiched between brake pads, and a braking force is generated by frictional force generated at that time. Drum brakes are, for example, those in which a brake lining (also called a brake shoe) is mounted inside a drum installed inside wheels, and exerts a braking force by pressing it from inside to outside. It is.
A friction material is provided on a brake pad of a disc brake and a brake lining of a drum brake, and the friction material rubs against a facing material such as a disc rotor and a drum to convert the kinetic energy of a vehicle or the like into thermal energy, thereby braking. I do. Therefore, the friction material is required to have a good friction coefficient, abrasion resistance (the life of the friction material is long), strength, vibration damping property (there is no occurrence of brake squeal), and the like.
ディスクブレーキのブレーキパッド及びドラムブレーキのブレーキライニングには摩擦材が設けられ、該摩擦材が、ディスクロータ、ドラム等の対面材と摩擦し、自動車等の運動エネルギーを熱エネルギーに変換することにより制動を行う。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。 Generally, brakes mounted on automobiles and the like are mainly divided into two main types, namely disc brakes and drum brakes. The disk brake is a device in which a disk rotor that rotates integrally with wheels during traveling is sandwiched between brake pads, and a braking force is generated by frictional force generated at that time. Drum brakes are, for example, those in which a brake lining (also called a brake shoe) is mounted inside a drum installed inside wheels, and exerts a braking force by pressing it from inside to outside. It is.
A friction material is provided on a brake pad of a disc brake and a brake lining of a drum brake, and the friction material rubs against a facing material such as a disc rotor and a drum to convert the kinetic energy of a vehicle or the like into thermal energy, thereby braking. I do. Therefore, the friction material is required to have a good friction coefficient, abrasion resistance (the life of the friction material is long), strength, vibration damping property (there is no occurrence of brake squeal), and the like.
近年は、ブレーキに対する要求性能の向上から、摩擦係数、耐摩耗性等の摩擦性能を有する摩擦材を「上張り材」として摺動面側に配置し、裏板との接着強度及び耐クラック性を有する「下張り材」を裏板側に配置するという、２層で構成されたブレーキパッドが一般的となっている。なお、上張り材が全て摩耗した際に下張り材で制動することになるため、下張り材は前記性能に加えて、良好な摩擦性能も有していることが求められる。
In recent years, in order to improve the performance required for brakes, friction materials with friction performance such as coefficient of friction and abrasion resistance have been arranged on the sliding surface side as "overlaying materials", and the adhesive strength to the back plate and crack resistance In general, a brake pad composed of two layers, in which a "underlaying material" having the following structure is disposed on the back plate side, is used. In addition, since the lower lining material is braked when all the upper lining material is worn, the lower lining material is required to have good friction performance in addition to the above performance.
そのような状況下、複数の凸部形状を有するチタン酸カリウムと、平均粒径が１～２．５μｍの珪酸ジルコニウムを含有する摩擦材組成物が提案されている（例えば、特許文献１参照）。
Under such circumstances, a friction material composition containing potassium titanate having a plurality of convex portions and zirconium silicate having an average particle diameter of 1 to 2.5 μm has been proposed (for example, see Patent Document 1). .
しかしながら、本発明者等の検討により、特許文献１に記載の摩擦材組成物を参照して研削材を下張り材用摩擦材組成物に含有させて摩擦係数の向上を試みると、背反特性である耐摩耗性が大幅に悪化するという問題が生じ得ることが判明した。
そこで、本発明の課題は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を発現し得る摩擦材組成物（特に、下張り材用摩擦材組成物）を提供すること、並びに該摩擦材組成物を成形してなる下張り材、該下張り材を有する摩擦部材、及び該下張り材又は該摩擦部材を搭載した車を提供することにある。 However, according to the study of the present inventors, when the friction material is included in the friction material composition for a base material with reference to the friction material composition described inPatent Literature 1, an attempt is made to improve the coefficient of friction. It has been found that a problem that the wear resistance is significantly deteriorated may occur.
Therefore, an object of the present invention is to provide a friction material composition (particularly, a friction material composition for a subbing material) capable of exhibiting excellent friction performance while improving shear strength, crack resistance, and wear resistance at normal and high temperatures. Object), and a subbing material formed by molding the friction material composition, a friction member having the subbing material, and a vehicle equipped with the underlining material or the friction member.
そこで、本発明の課題は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を発現し得る摩擦材組成物（特に、下張り材用摩擦材組成物）を提供すること、並びに該摩擦材組成物を成形してなる下張り材、該下張り材を有する摩擦部材、及び該下張り材又は該摩擦部材を搭載した車を提供することにある。 However, according to the study of the present inventors, when the friction material is included in the friction material composition for a base material with reference to the friction material composition described in
Therefore, an object of the present invention is to provide a friction material composition (particularly, a friction material composition for a subbing material) capable of exhibiting excellent friction performance while improving shear strength, crack resistance, and wear resistance at normal and high temperatures. Object), and a subbing material formed by molding the friction material composition, a friction member having the subbing material, and a vehicle equipped with the underlining material or the friction member.
本発明者らは、上記の課題を解決すべく鋭意研究した結果、特定のモース硬度を有する研削材所定量を含有させた摩擦材組成物（特に、下張り材用摩擦材組成物）であれば上記の課題を解決し得ることを見出し、本発明を完成するに至った。本発明は、係る知見に基づいて完成したものである。
The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, if a friction material composition containing a predetermined amount of a grinding material having a specific Mohs hardness (particularly, a friction material composition for underlining material), The inventors have found that the above-mentioned problems can be solved, and have completed the present invention. The present invention has been completed based on such findings.
本発明は下記［１］～［１９］に関する。
［１］上張り材、下張り材及び裏金をこの順に有する摩擦部材であって、前記下張り材がモース硬度６．５以上の研削材を含有する摩擦部材。
［２］前記下張り材における前記モース硬度６．５以上の研削材の含有量が０．１～８．５質量％である、上記［１］に記載の摩擦部材。
［３］前記研削材の平均粒子径が０．５～２５０μｍである、上記［１］又は［２］に記載の摩擦部材。
［４］前記研削材が、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド及び金剛砂からなる群から選択される少なくとも１種である、上記［１］～［３］のいずれかに記載の摩擦部材。
［５］前記下張り材が、さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する、上記［１］～［４］のいずれかに記載の摩擦部材。
［６］前記下張り材が、さらにガラス繊維を含有する、上記［１］～［５］のいずれかに記載の摩擦部材。
［７］銅を含有しないか、又は含有していても銅の含有量は銅元素として０．５質量％未満である、上記［１］～［６］のいずれかに記載の摩擦部材。
［８］ディスクブレーキパッド用又はドラムブレーキライニング用である、上記［１］～［７］のいずれかに記載の摩擦部材。
［９］上記［１］～［８］のいずれかに記載の摩擦部材を搭載した車。
［１０］モース硬度６．５以上の研削材を含有する摩擦材組成物。
［１１］前記研削材の平均粒子径が０．５～２５０μｍである、上記［１０］に記載の摩擦材組成物。
［１２］前記研削材が、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド及び金剛砂からなる群から選択される少なくとも１種である、上記［１０］又は［１１］に記載の摩擦材組成物。
［１３］さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する、上記［１０］～［１２］のいずれかに記載の摩擦材組成物。
［１４］さらにガラス繊維を含有する、上記［１０］～［１３］のいずれかに記載の摩擦材組成物。
［１５］銅を含有しないか、又は含有していても銅の含有量は銅元素として０．５質量％未満である、上記［１０］～［１４］のいずれかに記載の摩擦材組成物。
［１６］ディスクブレーキパッド用又はドラムブレーキライニング用である、上記［１０］～［１５］のいずれかに記載の摩擦材組成物。
［１７］上記［１０］～［１６］のいずれかに記載の摩擦材組成物からなる下張り材用摩擦材組成物。
［１８］上記［１７］に記載の下張り材用摩擦材組成物を成形してなる下張り材。
［１９］上記［１８］に記載の下張り材を搭載した車。 The present invention relates to the following [1] to [19].
[1] A friction member having an upper material, a lower material and a backing metal in this order, wherein the lower material contains a grinding material having a Mohs hardness of 6.5 or more.
[2] The friction member according to [1], wherein the content of the abrasive having the Mohs hardness of 6.5 or more in the underlaying material is 0.1 to 8.5% by mass.
[3] The friction member according to [1] or [2], wherein the abrasive has an average particle diameter of 0.5 to 250 μm.
[4] The above-mentioned [1], wherein the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and quartz sand. The friction member according to any one of [3] to [3].
[5] The method according to any one of [1] to [4], wherein the underlaying material further contains at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder. Friction member.
[6] The friction member according to any one of [1] to [5], wherein the underlining material further contains glass fibers.
[7] The friction member according to any one of [1] to [6], wherein the friction member does not contain copper, or even if copper is contained, the content of copper is less than 0.5% by mass as a copper element.
[8] The friction member according to any one of [1] to [7], which is for a disc brake pad or a drum brake lining.
[9] A vehicle equipped with the friction member according to any one of [1] to [8].
[10] A friction material composition containing an abrasive having a Mohs hardness of 6.5 or more.
[11] The friction material composition according to the above [10], wherein the abrasive has an average particle size of 0.5 to 250 μm.
[12] The above-mentioned [10], wherein the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and quartz sand. Or the friction material composition according to [11].
[13] The friction material composition according to any of [10] to [12], further containing at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder. .
[14] The friction material composition according to any one of [10] to [13], further containing glass fibers.
[15] The friction material composition according to any of [10] to [14], wherein the friction material composition does not contain copper, or even when copper is contained, the copper content is less than 0.5% by mass as a copper element. .
[16] The friction material composition according to any one of the above [10] to [15], which is used for a disc brake pad or a drum brake lining.
[17] A friction material composition for an underlining material, comprising the friction material composition according to any of the above [10] to [16].
[18] An underlining material obtained by molding the friction material composition for an underlining material according to the above [17].
[19] A vehicle equipped with the underlining material according to the above [18].
［１］上張り材、下張り材及び裏金をこの順に有する摩擦部材であって、前記下張り材がモース硬度６．５以上の研削材を含有する摩擦部材。
［２］前記下張り材における前記モース硬度６．５以上の研削材の含有量が０．１～８．５質量％である、上記［１］に記載の摩擦部材。
［３］前記研削材の平均粒子径が０．５～２５０μｍである、上記［１］又は［２］に記載の摩擦部材。
［４］前記研削材が、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド及び金剛砂からなる群から選択される少なくとも１種である、上記［１］～［３］のいずれかに記載の摩擦部材。
［５］前記下張り材が、さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する、上記［１］～［４］のいずれかに記載の摩擦部材。
［６］前記下張り材が、さらにガラス繊維を含有する、上記［１］～［５］のいずれかに記載の摩擦部材。
［７］銅を含有しないか、又は含有していても銅の含有量は銅元素として０．５質量％未満である、上記［１］～［６］のいずれかに記載の摩擦部材。
［８］ディスクブレーキパッド用又はドラムブレーキライニング用である、上記［１］～［７］のいずれかに記載の摩擦部材。
［９］上記［１］～［８］のいずれかに記載の摩擦部材を搭載した車。
［１０］モース硬度６．５以上の研削材を含有する摩擦材組成物。
［１１］前記研削材の平均粒子径が０．５～２５０μｍである、上記［１０］に記載の摩擦材組成物。
［１２］前記研削材が、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド及び金剛砂からなる群から選択される少なくとも１種である、上記［１０］又は［１１］に記載の摩擦材組成物。
［１３］さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する、上記［１０］～［１２］のいずれかに記載の摩擦材組成物。
［１４］さらにガラス繊維を含有する、上記［１０］～［１３］のいずれかに記載の摩擦材組成物。
［１５］銅を含有しないか、又は含有していても銅の含有量は銅元素として０．５質量％未満である、上記［１０］～［１４］のいずれかに記載の摩擦材組成物。
［１６］ディスクブレーキパッド用又はドラムブレーキライニング用である、上記［１０］～［１５］のいずれかに記載の摩擦材組成物。
［１７］上記［１０］～［１６］のいずれかに記載の摩擦材組成物からなる下張り材用摩擦材組成物。
［１８］上記［１７］に記載の下張り材用摩擦材組成物を成形してなる下張り材。
［１９］上記［１８］に記載の下張り材を搭載した車。 The present invention relates to the following [1] to [19].
[1] A friction member having an upper material, a lower material and a backing metal in this order, wherein the lower material contains a grinding material having a Mohs hardness of 6.5 or more.
[2] The friction member according to [1], wherein the content of the abrasive having the Mohs hardness of 6.5 or more in the underlaying material is 0.1 to 8.5% by mass.
[3] The friction member according to [1] or [2], wherein the abrasive has an average particle diameter of 0.5 to 250 μm.
[4] The above-mentioned [1], wherein the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and quartz sand. The friction member according to any one of [3] to [3].
[5] The method according to any one of [1] to [4], wherein the underlaying material further contains at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder. Friction member.
[6] The friction member according to any one of [1] to [5], wherein the underlining material further contains glass fibers.
[7] The friction member according to any one of [1] to [6], wherein the friction member does not contain copper, or even if copper is contained, the content of copper is less than 0.5% by mass as a copper element.
[8] The friction member according to any one of [1] to [7], which is for a disc brake pad or a drum brake lining.
[9] A vehicle equipped with the friction member according to any one of [1] to [8].
[10] A friction material composition containing an abrasive having a Mohs hardness of 6.5 or more.
[11] The friction material composition according to the above [10], wherein the abrasive has an average particle size of 0.5 to 250 μm.
[12] The above-mentioned [10], wherein the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and quartz sand. Or the friction material composition according to [11].
[13] The friction material composition according to any of [10] to [12], further containing at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder. .
[14] The friction material composition according to any one of [10] to [13], further containing glass fibers.
[15] The friction material composition according to any of [10] to [14], wherein the friction material composition does not contain copper, or even when copper is contained, the copper content is less than 0.5% by mass as a copper element. .
[16] The friction material composition according to any one of the above [10] to [15], which is used for a disc brake pad or a drum brake lining.
[17] A friction material composition for an underlining material, comprising the friction material composition according to any of the above [10] to [16].
[18] An underlining material obtained by molding the friction material composition for an underlining material according to the above [17].
[19] A vehicle equipped with the underlining material according to the above [18].
常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を有する摩擦材組成物（特に、下張り材用摩擦材組成物）を提供すること、並びに該摩擦材組成物を成形してなる下張り材を含有する摩擦材、該下張り材を有する摩擦部材を提供することができる。
To provide a friction material composition (particularly, a friction material composition for an underlay material) having excellent friction performance while improving shear strength, crack resistance and wear resistance at ordinary temperature and high temperature, and the friction. The present invention can provide a friction material containing a subbing material obtained by molding a material composition, and a friction member having the subbing material.
以下、本発明について詳細に説明する。但し、以下の実施形態において、その構成要素は、特に明示した場合を除き、必須ではない。数値及びその範囲についても同様であり、本発明を制限するものではない。
本明細書中に記載されている数値範囲において、その数値範囲の上限値又は下限値は、実施例に示されている値に置き換えてもよい。さらに、本明細書において、下張り材又は下張り材用摩擦材組成物中の各成分の含有率は、各成分に該当する物質が複数種存在する場合には、特に断らない限り、下張り材又は下張り材用摩擦材組成物中に存在する当該複数種の物質の合計の含有率を意味する。
また、本明細書における記載事項を任意に組み合わせた態様も本発明に含まれる。 Hereinafter, the present invention will be described in detail. However, in the following embodiments, the components are not essential unless otherwise specified. The same applies to numerical values and their ranges, and does not limit the present invention.
In the numerical ranges described in this specification, the upper limit or the lower limit of the numerical range may be replaced with the value shown in the embodiment. Furthermore, in the present specification, the content of each component in the underlining material or the friction material composition for the underlining material, when there are a plurality of types of substances corresponding to each component, unless otherwise specified, It means the total content of the plurality of types of substances present in the material friction material composition.
In addition, embodiments in which the items described in this specification are arbitrarily combined are also included in the present invention.
本明細書中に記載されている数値範囲において、その数値範囲の上限値又は下限値は、実施例に示されている値に置き換えてもよい。さらに、本明細書において、下張り材又は下張り材用摩擦材組成物中の各成分の含有率は、各成分に該当する物質が複数種存在する場合には、特に断らない限り、下張り材又は下張り材用摩擦材組成物中に存在する当該複数種の物質の合計の含有率を意味する。
また、本明細書における記載事項を任意に組み合わせた態様も本発明に含まれる。 Hereinafter, the present invention will be described in detail. However, in the following embodiments, the components are not essential unless otherwise specified. The same applies to numerical values and their ranges, and does not limit the present invention.
In the numerical ranges described in this specification, the upper limit or the lower limit of the numerical range may be replaced with the value shown in the embodiment. Furthermore, in the present specification, the content of each component in the underlining material or the friction material composition for the underlining material, when there are a plurality of types of substances corresponding to each component, unless otherwise specified, It means the total content of the plurality of types of substances present in the material friction material composition.
In addition, embodiments in which the items described in this specification are arbitrarily combined are also included in the present invention.
本発明は、上張り材、下張り材及び裏金をこの順に有する摩擦部材であって、前記下張り材がモース硬度６．５以上の研削材を含有する摩擦部材である。本発明において、モース硬度は、「モース硬度１～１０までの標準物質」と傷つきやすさを比較することで測定したものであり、より詳細には実施例に記載の方法によって求めた値である。
The present invention is a friction member having an upper material, a lower material, and a backing metal in this order, wherein the lower material contains a grinding material having a Mohs hardness of 6.5 or more. In the present invention, the Mohs 'hardness is measured by comparing the susceptibility to damage with "a standard substance having a Mohs' hardness of 1 to 10", and more specifically, a value obtained by the method described in Examples. .
以下、摩擦材組成物の中でも、特に下張り材に用いる摩擦材組成物（以下、下張り材用摩擦材組成物と称する。）について詳述する。本発明は、下張り材用摩擦材組成物を成形してなる下張り材も提供するものであり、該「下張り材用摩擦材組成物」が含有し得る各成分は、「下張り材」が含有し得る成分ということになる。つまり、後述する「下張り材用摩擦材組成物」中の各成分に関する説明は、「下張り材」中の各成分に関する説明として読み替えることができる。
Hereinafter, among the friction material compositions, the friction material composition particularly used for the underlining material (hereinafter, referred to as the friction material composition for the underlining material) will be described in detail. The present invention also provides an underlining material formed by molding the underlining material friction material composition, and each component that can be contained in the “underlining material friction material composition” is included in the “underlining material”. It is a component to be obtained. In other words, the description about each component in the “friction material composition for underlining material” described below can be read as the description about each component in the “underlining material”.
［下張り材用摩擦材組成物］
本発明で用いる下張り材用摩擦材組成物は、モース硬度６．５以上の研削材を含有する下張り材用摩擦材組成物である。
本発明で用いる下張り材用摩擦材組成物の好ましい態様は、前記モース硬度６．５以上の研削材と共に、さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する下張り材用摩擦材組成物であり、より好ましい態様は、前記モース硬度６．５以上の研削材と共に、さらに有機充填材、無機充填材、繊維基材及び結合材を含有する下張り材用摩擦材組成物である。 [Friction material composition for underlay material]
The friction material composition for underlining material used in the present invention is a friction material composition for underlining material containing a grinding material having a Mohs hardness of 6.5 or more.
A preferred embodiment of the friction material composition for underlining material used in the present invention is selected from the group consisting of an organic filler, an inorganic filler, a fiber base material and a binder together with the abrasive having a Mohs hardness of 6.5 or more. A friction material composition for an underlaying material containing at least one kind, and a more preferred embodiment further contains an organic filler, an inorganic filler, a fiber base material, and a binder together with the abrasive having a Mohs hardness of 6.5 or more. A friction material composition for an underlaying material.
本発明で用いる下張り材用摩擦材組成物は、モース硬度６．５以上の研削材を含有する下張り材用摩擦材組成物である。
本発明で用いる下張り材用摩擦材組成物の好ましい態様は、前記モース硬度６．５以上の研削材と共に、さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する下張り材用摩擦材組成物であり、より好ましい態様は、前記モース硬度６．５以上の研削材と共に、さらに有機充填材、無機充填材、繊維基材及び結合材を含有する下張り材用摩擦材組成物である。 [Friction material composition for underlay material]
The friction material composition for underlining material used in the present invention is a friction material composition for underlining material containing a grinding material having a Mohs hardness of 6.5 or more.
A preferred embodiment of the friction material composition for underlining material used in the present invention is selected from the group consisting of an organic filler, an inorganic filler, a fiber base material and a binder together with the abrasive having a Mohs hardness of 6.5 or more. A friction material composition for an underlaying material containing at least one kind, and a more preferred embodiment further contains an organic filler, an inorganic filler, a fiber base material, and a binder together with the abrasive having a Mohs hardness of 6.5 or more. A friction material composition for an underlaying material.
ところで、摩擦材の強度のためには銅又は銅合金を含有する摩擦材が有利であることが知られているが、銅又は銅合金を含有する摩擦材は制動により発生する摩耗粉に銅を多量に含むため、それが河川、湖及び海洋等の汚染の原因となることが示唆されており、米国、特にカリフォルニア、ワシントンを中心として、摩擦材（上張り材）における銅成分の使用量を制限する法律が施行されている。そのため、米国をはじめ、諸外国にて使用し得る摩擦材とするには、銅を含有しないか、又は銅の含有量を大幅に低減する必要があり、銅を含有する摩擦材は、現在では商業的価値が乏しくなっている。そのため、本発明の下張り材用摩擦材組成物においても銅を含有しないことが好ましいが、銅を含む場合には、下張り材用摩擦材組成物における銅の含有率を銅元素として０．５質量％未満とすることにより、環境中に摩耗粉として放出されても、河川等の汚染を引き起こさないものとすることができる。なお、銅の含有率は、繊維状及び粉末状等の銅、銅合金及び銅化合物に含まれる銅元素（Ｃｕ）の、下張り材用摩擦材組成物全体における含有率を示す。下張り材用摩擦材組成物における銅の含有率は、銅元素として０．２質量％以下であることがより好ましく、０．０５質量％以下であることがさらに好ましい。
本発明の下張り材用摩擦材組成物であれば、銅を含まないか、又は含んでいてもその含有率が、銅元素として０．５質量％未満であっても、常温及び高温におけるせん断強度と、耐クラック性とを共に満足させることができ、且つ耐摩耗性にも優れる。 By the way, it is known that a friction material containing copper or a copper alloy is advantageous for the strength of the friction material.However, a friction material containing copper or a copper alloy contains copper as wear powder generated by braking. It has been suggested that it causes pollution of rivers, lakes and oceans due to its large amount, and the use of copper components in friction materials (overlaying materials) has been reduced mainly in the United States, especially California and Washington. Restricting laws are in place. Therefore, in order to be a friction material that can be used in other countries including the United States, it is necessary to not contain copper or to significantly reduce the content of copper. Commercial value is poor. Therefore, it is preferable that the friction material composition for underlining material of the present invention does not contain copper, but when copper is contained, the content of copper in the friction material composition for underlining material is 0.5 mass% as a copper element. By setting it to less than%, even if it is released as abrasion powder into the environment, it is possible to prevent pollution of rivers and the like. The copper content indicates the content of copper element (Cu) contained in fibrous and powdery copper, copper alloys and copper compounds in the entire friction material composition for underlining materials. The content of copper in the friction material composition for underlaying material is more preferably 0.2% by mass or less as a copper element, and further preferably 0.05% by mass or less.
If the friction material composition for underlining material of the present invention does not contain copper, or even if the content is less than 0.5% by mass as a copper element, the shear strength at normal temperature and high temperature is obtained. And crack resistance can be satisfied, and the abrasion resistance is also excellent.
本発明の下張り材用摩擦材組成物であれば、銅を含まないか、又は含んでいてもその含有率が、銅元素として０．５質量％未満であっても、常温及び高温におけるせん断強度と、耐クラック性とを共に満足させることができ、且つ耐摩耗性にも優れる。 By the way, it is known that a friction material containing copper or a copper alloy is advantageous for the strength of the friction material.However, a friction material containing copper or a copper alloy contains copper as wear powder generated by braking. It has been suggested that it causes pollution of rivers, lakes and oceans due to its large amount, and the use of copper components in friction materials (overlaying materials) has been reduced mainly in the United States, especially California and Washington. Restricting laws are in place. Therefore, in order to be a friction material that can be used in other countries including the United States, it is necessary to not contain copper or to significantly reduce the content of copper. Commercial value is poor. Therefore, it is preferable that the friction material composition for underlining material of the present invention does not contain copper, but when copper is contained, the content of copper in the friction material composition for underlining material is 0.5 mass% as a copper element. By setting it to less than%, even if it is released as abrasion powder into the environment, it is possible to prevent pollution of rivers and the like. The copper content indicates the content of copper element (Cu) contained in fibrous and powdery copper, copper alloys and copper compounds in the entire friction material composition for underlining materials. The content of copper in the friction material composition for underlaying material is more preferably 0.2% by mass or less as a copper element, and further preferably 0.05% by mass or less.
If the friction material composition for underlining material of the present invention does not contain copper, or even if the content is less than 0.5% by mass as a copper element, the shear strength at normal temperature and high temperature is obtained. And crack resistance can be satisfied, and the abrasion resistance is also excellent.
また、下張り材から鉄繊維等の鉄系金属を除くと、裏金との接着界面での発錆による耐久性低下等の問題が生じなくなる傾向にある。そのため、金属繊維を用いず、その代わりに無機繊維を用いる試みもなされたが、その場合、金属繊維のような靭性が得られず、常温又は高温でのせん断強度が低下するという問題、及び耐クラック性が低下する等の問題が新たに発生し得ることが判明した。ここで、鉄系金属とは、鉄を主成分とする金属であって、一般的な鉄鋼を指し、鉄の含有率は、鉄、鉄合金及び鉄化合物に含まれる鉄元素（Ｆｅ）の、下張り材用摩擦材組成物全体における含有率を示す。
そこで、発錆による耐久性低下等を避ける観点から、本発明の下張り材用摩擦材組成物においては鉄系金属を含有しないことが好ましいが、鉄系金属を含む場合であっても、下張り材用摩擦材組成物における鉄系金属の含有率を鉄元素として０．５質量％未満とすることにより、耐錆性を良好なものとすることができ、裏金との接着界面での発錆による耐久性低下を抑制できる。本発明においては、鉄系金属の含有率を前記範囲に抑えても十分な靭性を有し、常温又は高温でのせん断強度も高く、耐クラック性も良好であり、且つ耐摩耗性も良好である。下張り材用摩擦材組成物における鉄系金属の含有率は、鉄元素として０．２質量％以下であることがより好ましく、０．０５質量％以下であることがさらに好ましい。 In addition, when iron-based metals such as iron fibers are removed from the underlay material, there is a tendency that problems such as deterioration of durability due to rust at the bonding interface with the back metal do not occur. For this reason, attempts have been made to use inorganic fibers instead of metal fibers.However, in such a case, the toughness of metal fibers cannot be obtained, and the problem that the shear strength at room temperature or high temperature is reduced, and the problem of resistance It has been found that problems such as a decrease in cracking properties can newly occur. Here, the iron-based metal is a metal containing iron as a main component and refers to general iron and steel. The iron content is determined based on the iron element (Fe) contained in iron, iron alloys, and iron compounds. It shows the content in the entire friction material composition for underlining materials.
Therefore, from the viewpoint of avoiding a decrease in durability due to rust, it is preferable that the friction material composition for an underlining material of the present invention does not contain an iron-based metal. By making the content of the iron-based metal in the friction material composition for iron less than 0.5% by mass as an iron element, rust resistance can be improved, and rusting occurs at the bonding interface with the back metal. A decrease in durability can be suppressed. In the present invention, even if the content of the iron-based metal is suppressed to the above range, it has sufficient toughness, high shear strength at room temperature or high temperature, good crack resistance, and good wear resistance. is there. The content of the iron-based metal in the friction material composition for underlaying material is more preferably 0.2% by mass or less as an iron element, and further preferably 0.05% by mass or less.
そこで、発錆による耐久性低下等を避ける観点から、本発明の下張り材用摩擦材組成物においては鉄系金属を含有しないことが好ましいが、鉄系金属を含む場合であっても、下張り材用摩擦材組成物における鉄系金属の含有率を鉄元素として０．５質量％未満とすることにより、耐錆性を良好なものとすることができ、裏金との接着界面での発錆による耐久性低下を抑制できる。本発明においては、鉄系金属の含有率を前記範囲に抑えても十分な靭性を有し、常温又は高温でのせん断強度も高く、耐クラック性も良好であり、且つ耐摩耗性も良好である。下張り材用摩擦材組成物における鉄系金属の含有率は、鉄元素として０．２質量％以下であることがより好ましく、０．０５質量％以下であることがさらに好ましい。 In addition, when iron-based metals such as iron fibers are removed from the underlay material, there is a tendency that problems such as deterioration of durability due to rust at the bonding interface with the back metal do not occur. For this reason, attempts have been made to use inorganic fibers instead of metal fibers.However, in such a case, the toughness of metal fibers cannot be obtained, and the problem that the shear strength at room temperature or high temperature is reduced, and the problem of resistance It has been found that problems such as a decrease in cracking properties can newly occur. Here, the iron-based metal is a metal containing iron as a main component and refers to general iron and steel. The iron content is determined based on the iron element (Fe) contained in iron, iron alloys, and iron compounds. It shows the content in the entire friction material composition for underlining materials.
Therefore, from the viewpoint of avoiding a decrease in durability due to rust, it is preferable that the friction material composition for an underlining material of the present invention does not contain an iron-based metal. By making the content of the iron-based metal in the friction material composition for iron less than 0.5% by mass as an iron element, rust resistance can be improved, and rusting occurs at the bonding interface with the back metal. A decrease in durability can be suppressed. In the present invention, even if the content of the iron-based metal is suppressed to the above range, it has sufficient toughness, high shear strength at room temperature or high temperature, good crack resistance, and good wear resistance. is there. The content of the iron-based metal in the friction material composition for underlaying material is more preferably 0.2% by mass or less as an iron element, and further preferably 0.05% by mass or less.
なお、本発明の下張り材用摩擦材組成物は、ＮＡＯ（Non-Asbestos-Organic）材に分類されるものであり、いわゆるノンアスベスト摩擦材組成物（アスベストを含有しない摩擦材組成物、又は含有する場合であってもアスベストの含有量が極微量の摩擦材組成物）である。本発明の下張り材用摩擦材組成物中、アスベストの含有量は好ましくは０．２質量％以下であり、より好ましくは実質的に０質量％である。
The friction material composition for underlining material of the present invention is classified as a NAO (Non-Asbestos-Organic) material, and is a so-called non-asbestos friction material composition (a friction material composition containing no asbestos or containing asbestos). Even when the friction material composition is used, the asbestos content is a very small amount. In the friction material composition for underlining material of the present invention, the content of asbestos is preferably 0.2% by mass or less, more preferably substantially 0% by mass.
以下、本発明の下張り材用摩擦材組成物の各成分について順に説明する。
（研削材）
本発明の下張り材用摩擦材組成物は、前述の通り、モース硬度６．５以上の研削材を含有する。モース硬度６．５以上の研削材であれば、ディスクロータ及びブレーキドラム等の対面材に対して十分な研削性能を有するため、摩擦係数を向上させることができる。そのため、本発明の下張り材用摩擦材組成物は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を発現する。該研削材のモース硬度は、好ましくは６．７以上、より好ましくは７．０以上である。研削材のモース硬度の上限値に特に制限はないが、通常、１０以下であり、９．５以下であってもよいし、８．０以下であってもよい。該研削材は、１種を単独で使用してもよいし、２種以上を併用してもよい。
モース硬度６．５以上の研削材としては、例えば、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド、金剛砂等が挙げられ、これらからなる群から選択される少なくとも１種であることが好ましい。これらの中でも、珪酸ジルコニウム、ムライト及びα－アルミナからなる群から選択される少なくとも１種であることが好ましい。
研削材の形状に特に制限はないが、例えば、球状、円柱状、多角形状、針状、不定形等が挙げられる。これらの中でも、球状、多角形状、針状、不定形が好ましく、多角形状、不定形がさらに好ましい。
前記研削材の平均粒子径は、好ましくは０．５～２５０μｍ、より好ましくは０．５～２００μｍ、さらに好ましくは１～１７０μｍであり、また、０．５～１００μｍであってもよいし、０．５～５０μｍであってもよいし、０．５～１０μｍであってもよいし、０．５～７μｍであってもよいし、３～２００μｍであってもよいし、１００～２００μｍであってもよいし、１３０～１７０μｍであってもよい。平均粒子径が０．５μｍ以上であれば、摺動時に前記研削材が摺動面から脱落することが抑制され、摩擦係数が向上する傾向にある。また、平均粒子径が２５０μｍ以下であれば、対面材の摩耗が抑制される傾向にある。
なお、本明細書において、平均粒子径は、レーザー回折粒度分布測定の方法を用いて測定したｄ５０の値（体積分布のメジアン径、累積中央値）を意味し、以下同様である。例えば、レーザー回折／散乱式粒子径分布測定装置、商品名：ＬＡ・９２０（株式会社堀場製作所製）で測定することができる。また、市販品であれば、平均粒子径としてカタログ値を参照できる。 Hereinafter, each component of the friction material composition for underlining material of the present invention will be described in order.
(Abrasive material)
As described above, the friction material composition for underlining material of the present invention contains an abrasive having a Mohs hardness of 6.5 or more. A grinding material having a Mohs hardness of 6.5 or more has sufficient grinding performance on facing materials such as a disk rotor and a brake drum, so that the friction coefficient can be improved. Therefore, the friction material composition for underlining material of the present invention expresses excellent friction performance while improving shear strength, crack resistance and wear resistance at ordinary temperature and high temperature. The Mohs hardness of the abrasive is preferably 6.7 or more, more preferably 7.0 or more. The upper limit of the Mohs hardness of the abrasive is not particularly limited, but is usually 10 or less, may be 9.5 or less, or may be 8.0 or less. As the abrasive, one kind may be used alone, or two or more kinds may be used in combination.
Examples of the abrasive having a Mohs hardness of 6.5 or more include, for example, chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and fine sand. Preferably, at least one of them is used. Among these, at least one selected from the group consisting of zirconium silicate, mullite and α-alumina is preferable.
The shape of the abrasive is not particularly limited, and examples thereof include a sphere, a column, a polygon, a needle, and an irregular shape. Among these, spherical, polygonal, acicular, and irregular shapes are preferred, and polygonal and irregular shapes are more preferred.
The average particle size of the abrasive is preferably 0.5 to 250 μm, more preferably 0.5 to 200 μm, still more preferably 1 to 170 μm, or 0.5 to 100 μm, or 0 to 100 μm. It may be 5 to 50 μm, 0.5 to 10 μm, 0.5 to 7 μm, 3 to 200 μm, or 100 to 200 μm. It may be 130 to 170 μm. When the average particle size is 0.5 μm or more, the abrasive is prevented from falling off the sliding surface during sliding, and the friction coefficient tends to be improved. Further, when the average particle diameter is 250 μm or less, abrasion of the facing material tends to be suppressed.
In the present specification, the average particle diameter means a value of d50 (median diameter of volume distribution, cumulative median value) measured using a laser diffraction particle size distribution measuring method, and the same applies hereinafter. For example, it can be measured with a laser diffraction / scattering type particle size distribution analyzer, trade name: LA.920 (manufactured by Horiba, Ltd.). In the case of a commercially available product, catalog values can be referred to as the average particle size.
（研削材）
本発明の下張り材用摩擦材組成物は、前述の通り、モース硬度６．５以上の研削材を含有する。モース硬度６．５以上の研削材であれば、ディスクロータ及びブレーキドラム等の対面材に対して十分な研削性能を有するため、摩擦係数を向上させることができる。そのため、本発明の下張り材用摩擦材組成物は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を発現する。該研削材のモース硬度は、好ましくは６．７以上、より好ましくは７．０以上である。研削材のモース硬度の上限値に特に制限はないが、通常、１０以下であり、９．５以下であってもよいし、８．０以下であってもよい。該研削材は、１種を単独で使用してもよいし、２種以上を併用してもよい。
モース硬度６．５以上の研削材としては、例えば、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド、金剛砂等が挙げられ、これらからなる群から選択される少なくとも１種であることが好ましい。これらの中でも、珪酸ジルコニウム、ムライト及びα－アルミナからなる群から選択される少なくとも１種であることが好ましい。
研削材の形状に特に制限はないが、例えば、球状、円柱状、多角形状、針状、不定形等が挙げられる。これらの中でも、球状、多角形状、針状、不定形が好ましく、多角形状、不定形がさらに好ましい。
前記研削材の平均粒子径は、好ましくは０．５～２５０μｍ、より好ましくは０．５～２００μｍ、さらに好ましくは１～１７０μｍであり、また、０．５～１００μｍであってもよいし、０．５～５０μｍであってもよいし、０．５～１０μｍであってもよいし、０．５～７μｍであってもよいし、３～２００μｍであってもよいし、１００～２００μｍであってもよいし、１３０～１７０μｍであってもよい。平均粒子径が０．５μｍ以上であれば、摺動時に前記研削材が摺動面から脱落することが抑制され、摩擦係数が向上する傾向にある。また、平均粒子径が２５０μｍ以下であれば、対面材の摩耗が抑制される傾向にある。
なお、本明細書において、平均粒子径は、レーザー回折粒度分布測定の方法を用いて測定したｄ５０の値（体積分布のメジアン径、累積中央値）を意味し、以下同様である。例えば、レーザー回折／散乱式粒子径分布測定装置、商品名：ＬＡ・９２０（株式会社堀場製作所製）で測定することができる。また、市販品であれば、平均粒子径としてカタログ値を参照できる。 Hereinafter, each component of the friction material composition for underlining material of the present invention will be described in order.
(Abrasive material)
As described above, the friction material composition for underlining material of the present invention contains an abrasive having a Mohs hardness of 6.5 or more. A grinding material having a Mohs hardness of 6.5 or more has sufficient grinding performance on facing materials such as a disk rotor and a brake drum, so that the friction coefficient can be improved. Therefore, the friction material composition for underlining material of the present invention expresses excellent friction performance while improving shear strength, crack resistance and wear resistance at ordinary temperature and high temperature. The Mohs hardness of the abrasive is preferably 6.7 or more, more preferably 7.0 or more. The upper limit of the Mohs hardness of the abrasive is not particularly limited, but is usually 10 or less, may be 9.5 or less, or may be 8.0 or less. As the abrasive, one kind may be used alone, or two or more kinds may be used in combination.
Examples of the abrasive having a Mohs hardness of 6.5 or more include, for example, chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and fine sand. Preferably, at least one of them is used. Among these, at least one selected from the group consisting of zirconium silicate, mullite and α-alumina is preferable.
The shape of the abrasive is not particularly limited, and examples thereof include a sphere, a column, a polygon, a needle, and an irregular shape. Among these, spherical, polygonal, acicular, and irregular shapes are preferred, and polygonal and irregular shapes are more preferred.
The average particle size of the abrasive is preferably 0.5 to 250 μm, more preferably 0.5 to 200 μm, still more preferably 1 to 170 μm, or 0.5 to 100 μm, or 0 to 100 μm. It may be 5 to 50 μm, 0.5 to 10 μm, 0.5 to 7 μm, 3 to 200 μm, or 100 to 200 μm. It may be 130 to 170 μm. When the average particle size is 0.5 μm or more, the abrasive is prevented from falling off the sliding surface during sliding, and the friction coefficient tends to be improved. Further, when the average particle diameter is 250 μm or less, abrasion of the facing material tends to be suppressed.
In the present specification, the average particle diameter means a value of d50 (median diameter of volume distribution, cumulative median value) measured using a laser diffraction particle size distribution measuring method, and the same applies hereinafter. For example, it can be measured with a laser diffraction / scattering type particle size distribution analyzer, trade name: LA.920 (manufactured by Horiba, Ltd.). In the case of a commercially available product, catalog values can be referred to as the average particle size.
前記研削材の含有量は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性の観点から、本発明の下張り材用摩擦材組成物１００質量部に対して０．１～８．５質量部であることが好ましい。該含有量は、０．１～５質量部であってもよいし、０．１～３質量部であってもよいし、１～８．５質量部であってもよいし、４～８．５質量部であってもよい。０．１質量部以上とすることで、摩擦係数が向上する傾向にあり、８．５質量部以下とすることで、対面材への攻撃性を低減し、耐摩耗性の悪化及び摩擦係数の過度な上昇が抑制される傾向にある。
The content of the abrasive is from 0.1 to 8.5 parts by mass based on 100 parts by mass of the friction material composition for underlining material of the present invention, from the viewpoints of shear strength, crack resistance, and wear resistance at room temperature and high temperature. Part. The content may be 0.1 to 5 parts by mass, 0.1 to 3 parts by mass, 1 to 8.5 parts by mass, or 4 to 8 parts by mass. It may be 0.5 parts by mass. When the amount is 0.1 parts by mass or more, the friction coefficient tends to be improved. When the amount is 8.5 parts by mass or less, the aggressiveness to the facing material is reduced, the abrasion resistance is deteriorated, and the friction coefficient is reduced. An excessive rise tends to be suppressed.
（有機充填材）
有機充填材は、制振性及び耐摩耗性等を向上させるための摩擦調整剤としての機能を発現し得るものである。ここで、本発明において、該有機充填材は繊維形状のもの（例えば後述の有機繊維）を含まない。有機充填材は、１種を単独で使用してもよいし、２種以上を併用してもよい。
前記有機充填材としては、摩擦材組成物に一般的に用いられる有機充填材を使用することができ、例えば、カシューパーティクル、ゴム、メラミンダスト等が挙げられる。これらの中でも、摩擦係数の安定性及び耐摩耗性を良好とする観点並びに鳴きを抑制する観点から、カシューパーティクル、ゴムが好ましい。
また、有機充填材としては、カシューパーティクルとゴムとを併用してもよいし、カシューパーティクルをゴムで被覆したものを用いてもよい。 (Organic filler)
The organic filler can exhibit a function as a friction modifier for improving the vibration damping property and the wear resistance. Here, in the present invention, the organic filler does not include a fibrous material (for example, an organic fiber described later). One kind of the organic filler may be used alone, or two or more kinds may be used in combination.
As the organic filler, an organic filler generally used in a friction material composition can be used, and examples thereof include cashew particles, rubber, and melamine dust. Among these, cashew particles and rubber are preferable from the viewpoint of improving the stability of the coefficient of friction and the abrasion resistance and suppressing the squeal.
Further, as the organic filler, cashew particles and rubber may be used in combination, or cashew particles coated with rubber may be used.
有機充填材は、制振性及び耐摩耗性等を向上させるための摩擦調整剤としての機能を発現し得るものである。ここで、本発明において、該有機充填材は繊維形状のもの（例えば後述の有機繊維）を含まない。有機充填材は、１種を単独で使用してもよいし、２種以上を併用してもよい。
前記有機充填材としては、摩擦材組成物に一般的に用いられる有機充填材を使用することができ、例えば、カシューパーティクル、ゴム、メラミンダスト等が挙げられる。これらの中でも、摩擦係数の安定性及び耐摩耗性を良好とする観点並びに鳴きを抑制する観点から、カシューパーティクル、ゴムが好ましい。
また、有機充填材としては、カシューパーティクルとゴムとを併用してもよいし、カシューパーティクルをゴムで被覆したものを用いてもよい。 (Organic filler)
The organic filler can exhibit a function as a friction modifier for improving the vibration damping property and the wear resistance. Here, in the present invention, the organic filler does not include a fibrous material (for example, an organic fiber described later). One kind of the organic filler may be used alone, or two or more kinds may be used in combination.
As the organic filler, an organic filler generally used in a friction material composition can be used, and examples thereof include cashew particles, rubber, and melamine dust. Among these, cashew particles and rubber are preferable from the viewpoint of improving the stability of the coefficient of friction and the abrasion resistance and suppressing the squeal.
Further, as the organic filler, cashew particles and rubber may be used in combination, or cashew particles coated with rubber may be used.
前記カシューパーティクルは、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、一般的に、カシューダストと称されることもある。
カシューパーティクルは、一般的に、硬化反応に使用する硬化剤の種類に応じて、茶系、茶黒系、黒系等に分類される。カシューパーティクルは、分子量等を調整することで、耐熱性及び音振性、さらに相手材であるロータへの皮膜形成性等を制御し易くすることが可能である。
カシューパーティクルの平均粒子径は、分散性の観点から、８５０μｍ以下であることが好ましく、７５０μｍ以下であることがより好ましく、６００μｍ以下であることがさらに好ましい。カシューパーティクルの平均粒子径の下限値に特に制限はなく、２００μｍ以上であってもよく、３００μｍ以上であってもよく、４００μｍ以上であってもよい。
カシューパーティクルは、１種を単独で使用してもよいし、２種以上を併用してもよい。
本発明の下張り材用摩擦材組成物がカシューパーティクルを含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは０．５～１５質量部、より好ましくは１～１０質量部、さらに好ましくは２～５質量部である。下張り材用摩擦材組成物１００質量部に対して０．５質量部以上とすることで、下張り材の弾性率が高くなる傾向にあり、さらに鳴き等の制振性の悪化及び耐摩耗性の悪化を避けることができる傾向にある。一方、下張り材用摩擦材組成物１００質量部に対して１５質量部以下とすることで、耐熱性及び耐クラック性の低下を防げる傾向にある。 The cashew particles are obtained by pulverizing hardened cashew nut shell oil and may be generally referred to as cashew dust.
Cashew particles are generally classified into brown, brown-black, black, and the like, depending on the type of curing agent used in the curing reaction. By adjusting the molecular weight and the like of the cashew particles, it is possible to easily control the heat resistance, the sound and vibration properties, and the film forming property on the rotor as the mating material.
The average particle size of the cashew particles is preferably 850 μm or less, more preferably 750 μm or less, and even more preferably 600 μm or less, from the viewpoint of dispersibility. The lower limit of the average particle size of the cashew particles is not particularly limited, and may be 200 μm or more, 300 μm or more, or 400 μm or more.
One type of cashew particles may be used alone, or two or more types may be used in combination.
When the friction material composition for underlining material of the present invention contains cashew particles, the content is preferably 0.5 to 15 parts by mass, more preferably 0.5 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. The amount is 1 to 10 parts by mass, more preferably 2 to 5 parts by mass. By setting the amount to 0.5 parts by mass or more with respect to 100 parts by mass of the friction material composition for the underlining material, the elastic modulus of the underlining material tends to increase, and furthermore, the vibration damping property such as squealing deteriorates and the abrasion resistance decreases. Deterioration tends to be avoided. On the other hand, when the amount is 15 parts by mass or less with respect to 100 parts by mass of the friction material composition for an underlaying material, the heat resistance and the crack resistance tend to be prevented from lowering.
カシューパーティクルは、一般的に、硬化反応に使用する硬化剤の種類に応じて、茶系、茶黒系、黒系等に分類される。カシューパーティクルは、分子量等を調整することで、耐熱性及び音振性、さらに相手材であるロータへの皮膜形成性等を制御し易くすることが可能である。
カシューパーティクルの平均粒子径は、分散性の観点から、８５０μｍ以下であることが好ましく、７５０μｍ以下であることがより好ましく、６００μｍ以下であることがさらに好ましい。カシューパーティクルの平均粒子径の下限値に特に制限はなく、２００μｍ以上であってもよく、３００μｍ以上であってもよく、４００μｍ以上であってもよい。
カシューパーティクルは、１種を単独で使用してもよいし、２種以上を併用してもよい。
本発明の下張り材用摩擦材組成物がカシューパーティクルを含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは０．５～１５質量部、より好ましくは１～１０質量部、さらに好ましくは２～５質量部である。下張り材用摩擦材組成物１００質量部に対して０．５質量部以上とすることで、下張り材の弾性率が高くなる傾向にあり、さらに鳴き等の制振性の悪化及び耐摩耗性の悪化を避けることができる傾向にある。一方、下張り材用摩擦材組成物１００質量部に対して１５質量部以下とすることで、耐熱性及び耐クラック性の低下を防げる傾向にある。 The cashew particles are obtained by pulverizing hardened cashew nut shell oil and may be generally referred to as cashew dust.
Cashew particles are generally classified into brown, brown-black, black, and the like, depending on the type of curing agent used in the curing reaction. By adjusting the molecular weight and the like of the cashew particles, it is possible to easily control the heat resistance, the sound and vibration properties, and the film forming property on the rotor as the mating material.
The average particle size of the cashew particles is preferably 850 μm or less, more preferably 750 μm or less, and even more preferably 600 μm or less, from the viewpoint of dispersibility. The lower limit of the average particle size of the cashew particles is not particularly limited, and may be 200 μm or more, 300 μm or more, or 400 μm or more.
One type of cashew particles may be used alone, or two or more types may be used in combination.
When the friction material composition for underlining material of the present invention contains cashew particles, the content is preferably 0.5 to 15 parts by mass, more preferably 0.5 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. The amount is 1 to 10 parts by mass, more preferably 2 to 5 parts by mass. By setting the amount to 0.5 parts by mass or more with respect to 100 parts by mass of the friction material composition for the underlining material, the elastic modulus of the underlining material tends to increase, and furthermore, the vibration damping property such as squealing deteriorates and the abrasion resistance decreases. Deterioration tends to be avoided. On the other hand, when the amount is 15 parts by mass or less with respect to 100 parts by mass of the friction material composition for an underlaying material, the heat resistance and the crack resistance tend to be prevented from lowering.
前記ゴムとしては摩擦材組成物に通常用いられるゴムが挙げられ、例えば天然ゴム、合成ゴムが挙げられ、合成ゴムとしては、例えば、アクリロニトリル－ブタジエンゴム（ＮＢＲ）、アクリルゴム、イソプレンゴム、ポリブタジエンゴム（ＢＲ）、スチレンブタジエンゴム（ＳＢＲ）、シリコーンゴム、タイヤトレッドゴムの粉砕粉等が挙げられる。これらの中でも、耐熱性、柔軟性及び製造コストのバランスの観点から、アクリロニトリル－ブタジエンゴム（ＮＢＲ）、タイヤトレッドゴムの粉砕粉が好ましい。前記ゴムの含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは１～３０質量部、より好ましくは２～１５質量部、さらに好ましくは２～１０質量部、特に好ましくは２～６質量部である。前記ゴムの含有量を上記範囲とすることで、下張り材の弾性率が高くなること、及び鳴き等の制振性が悪化することを避けることができる傾向にあり、また、耐熱性の悪化及び熱履歴による強度低下を避けることができる傾向にある。
Examples of the rubber include those commonly used in friction material compositions, such as natural rubber and synthetic rubber. Examples of the synthetic rubber include acrylonitrile-butadiene rubber (NBR), acrylic rubber, isoprene rubber, and polybutadiene rubber. (BR), styrene-butadiene rubber (SBR), silicone rubber, pulverized powder of tire tread rubber, and the like. Among them, acrylonitrile-butadiene rubber (NBR) and pulverized powder of tire tread rubber are preferable from the viewpoint of balance between heat resistance, flexibility and production cost. The content of the rubber is preferably 1 to 30 parts by mass, more preferably 2 to 15 parts by mass, still more preferably 2 to 10 parts by mass, particularly preferably 100 parts by mass of the friction material composition for underlining material. It is 2 to 6 parts by mass. By setting the content of the rubber in the above range, the elastic modulus of the underlining material is increased, and there is a tendency that it is possible to avoid deterioration of vibration damping properties such as squealing, There is a tendency that a decrease in strength due to heat history can be avoided.
下張り材用摩擦材組成物が有機充填材を含有する場合、その合計含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは１～２０質量部、より好ましくは１～１０質量部、さらに好ましくは２～８質量部、特に好ましくは３～８質量部である。有機充填材の合計含有量を上記範囲とすることで、下張り材の弾性率が高くなること、並びに鳴き等の制振性の悪化及び耐摩耗性の悪化を避けることができる傾向にあり、また、耐熱性の悪化及び熱履歴による強度低下を避けることができる傾向にある。
When the friction material composition for underlining material contains an organic filler, the total content is preferably 1 to 20 parts by mass, more preferably 1 to 10 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. Parts by mass, more preferably 2 to 8 parts by mass, particularly preferably 3 to 8 parts by mass. By setting the total content of the organic filler in the above range, the elastic modulus of the underlay material is increased, and there is a tendency that deterioration of vibration damping properties such as squeal and deterioration of wear resistance can be avoided, and In addition, there is a tendency that deterioration in heat resistance and reduction in strength due to heat history can be avoided.
（無機充填材）
無機充填材は、下張り材の耐熱性、耐摩耗性、摩擦係数の安定性等の悪化を避けるための摩擦調整材としての機能を発現し得るものである。ここで、本発明においては、該無機充填材は繊維形状のもの（例えば後述の無機繊維）及び前記モース硬度６．５以上の研削材を含まない。無機充填材は、１種を単独で使用してもよいし、２種以上を併用してもよい。
該無機充填材としては特に制限はなく、下張り材に通常用いられる無機充填材でよい。無機充填材としては、例えば、三硫化アンチモン、硫化スズ、二硫化モリブデン、硫化ビスマス、硫化亜鉛等の金属硫化物；チタン酸カリウム、チタン酸リチウムカリウム、チタン酸ナトリウム、チタン酸マグネシウムカリウム等のチタン酸塩；マイカ、黒鉛、コークス、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、マイカ、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、クロマイト、酸化ジルコニウム、酸化チタン、酸化マグネシウム、四酸化三鉄、酸化亜鉛、γ－アルミナ；鉄粉末、鋳鉄粉末、アルミニウム粉末、ニッケル粉末、スズ粉末、亜鉛粉末、及び前記金属のうちの少なくとも１つの金属を含有する合金粉末等の金属粉末などが挙げられるが、銅及び鉄系金属を含有しないものが好ましい。これらの中でも、金属硫化物、チタン酸塩、マイカ、黒鉛、水酸化カルシウム及び硫酸バリウムからなる群から選択される少なくとも１種が好ましく、黒鉛、水酸化カルシウム及び硫酸バリウムからなる群から選択される少なくとも１種がより好ましく、黒鉛、水酸化カルシウム及び硫酸バリウムを併用することがさらに好ましい。 (Inorganic filler)
The inorganic filler can exhibit a function as a friction adjusting material for avoiding deterioration of the heat resistance, abrasion resistance, stability of friction coefficient and the like of the underlining material. Here, in the present invention, the inorganic filler does not include a fibrous material (for example, an inorganic fiber described later) and the abrasive having the Mohs hardness of 6.5 or more. As the inorganic filler, one type may be used alone, or two or more types may be used in combination.
The inorganic filler is not particularly limited, and may be an inorganic filler usually used for an underlay material. Examples of the inorganic filler include metal sulfides such as antimony trisulfide, tin sulfide, molybdenum disulfide, bismuth sulfide, and zinc sulfide; and titanium such as potassium titanate, lithium potassium titanate, sodium titanate, and potassium magnesium titanate. Acid salts; mica, graphite, coke, calcium hydroxide, calcium oxide, sodium carbonate, calcium carbonate, magnesium carbonate, barium sulfate, dolomite, coke, mica, vermiculite, calcium sulfate, talc, clay, zeolite, chromite, zirconium oxide, Titanium oxide, magnesium oxide, triiron tetroxide, zinc oxide, γ-alumina; iron powder, cast iron powder, aluminum powder, nickel powder, tin powder, zinc powder, and an alloy containing at least one of the above metals Metals such as powder End, and the like, but is preferably one not containing copper and iron metal. Among these, at least one selected from the group consisting of metal sulfides, titanates, mica, graphite, calcium hydroxide and barium sulfate is preferred, and is selected from the group consisting of graphite, calcium hydroxide and barium sulfate. At least one is more preferable, and it is further preferable to use graphite, calcium hydroxide, and barium sulfate in combination.
無機充填材は、下張り材の耐熱性、耐摩耗性、摩擦係数の安定性等の悪化を避けるための摩擦調整材としての機能を発現し得るものである。ここで、本発明においては、該無機充填材は繊維形状のもの（例えば後述の無機繊維）及び前記モース硬度６．５以上の研削材を含まない。無機充填材は、１種を単独で使用してもよいし、２種以上を併用してもよい。
該無機充填材としては特に制限はなく、下張り材に通常用いられる無機充填材でよい。無機充填材としては、例えば、三硫化アンチモン、硫化スズ、二硫化モリブデン、硫化ビスマス、硫化亜鉛等の金属硫化物；チタン酸カリウム、チタン酸リチウムカリウム、チタン酸ナトリウム、チタン酸マグネシウムカリウム等のチタン酸塩；マイカ、黒鉛、コークス、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、マイカ、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、クロマイト、酸化ジルコニウム、酸化チタン、酸化マグネシウム、四酸化三鉄、酸化亜鉛、γ－アルミナ；鉄粉末、鋳鉄粉末、アルミニウム粉末、ニッケル粉末、スズ粉末、亜鉛粉末、及び前記金属のうちの少なくとも１つの金属を含有する合金粉末等の金属粉末などが挙げられるが、銅及び鉄系金属を含有しないものが好ましい。これらの中でも、金属硫化物、チタン酸塩、マイカ、黒鉛、水酸化カルシウム及び硫酸バリウムからなる群から選択される少なくとも１種が好ましく、黒鉛、水酸化カルシウム及び硫酸バリウムからなる群から選択される少なくとも１種がより好ましく、黒鉛、水酸化カルシウム及び硫酸バリウムを併用することがさらに好ましい。 (Inorganic filler)
The inorganic filler can exhibit a function as a friction adjusting material for avoiding deterioration of the heat resistance, abrasion resistance, stability of friction coefficient and the like of the underlining material. Here, in the present invention, the inorganic filler does not include a fibrous material (for example, an inorganic fiber described later) and the abrasive having the Mohs hardness of 6.5 or more. As the inorganic filler, one type may be used alone, or two or more types may be used in combination.
The inorganic filler is not particularly limited, and may be an inorganic filler usually used for an underlay material. Examples of the inorganic filler include metal sulfides such as antimony trisulfide, tin sulfide, molybdenum disulfide, bismuth sulfide, and zinc sulfide; and titanium such as potassium titanate, lithium potassium titanate, sodium titanate, and potassium magnesium titanate. Acid salts; mica, graphite, coke, calcium hydroxide, calcium oxide, sodium carbonate, calcium carbonate, magnesium carbonate, barium sulfate, dolomite, coke, mica, vermiculite, calcium sulfate, talc, clay, zeolite, chromite, zirconium oxide, Titanium oxide, magnesium oxide, triiron tetroxide, zinc oxide, γ-alumina; iron powder, cast iron powder, aluminum powder, nickel powder, tin powder, zinc powder, and an alloy containing at least one of the above metals Metals such as powder End, and the like, but is preferably one not containing copper and iron metal. Among these, at least one selected from the group consisting of metal sulfides, titanates, mica, graphite, calcium hydroxide and barium sulfate is preferred, and is selected from the group consisting of graphite, calcium hydroxide and barium sulfate. At least one is more preferable, and it is further preferable to use graphite, calcium hydroxide, and barium sulfate in combination.
なお、上記無機充填材のうち、水酸化カルシウム、炭酸ナトリウム及び酸化亜鉛は、下張り材の錆発生の抑制の観点から好ましい。ただし、水酸化カルシウムは下張り材のｐＨを増加させ、アラミド繊維が分解し易くなる傾向があるため、使用する際にはｐＨが高くなり過ぎないように使用量に注意することが好ましく、例えば、無機充填材として水酸化カルシウムを含有する場合、水酸化カルシウムの含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは０．５～１０質量部、より好ましくは１～８質量部、さらに好ましくは１～５質量部である。
カ ル シ ウ ム Of the above-mentioned inorganic fillers, calcium hydroxide, sodium carbonate and zinc oxide are preferred from the viewpoint of suppressing rusting of the underlay material. However, calcium hydroxide increases the pH of the underlaying material, and since the aramid fiber tends to be easily decomposed, it is preferable to pay attention to the amount used so that the pH does not become too high when used, for example, When calcium hydroxide is contained as an inorganic filler, the content of calcium hydroxide is preferably 0.5 to 10 parts by mass, more preferably 1 to 8 parts by mass, based on 100 parts by mass of the friction material composition for underlining materials. It is part by mass, more preferably 1 to 5 parts by mass.
前記黒鉛としては、特に制限されるものではなく、公知の黒鉛、つまり、天然黒鉛、人造黒鉛のいずれも使用することができる。黒鉛は、平均粒子径が１～５０μｍであることが好ましく、２～４０μｍであることがより好ましく、５～３０μｍであることがさらに好ましく、１０～２０μｍであることが特に好ましい。黒鉛の平均粒子径が１μｍ以上であると、下張り材の熱伝導率が過度に上昇することが抑制され、摩擦熱がバックプレート側に伝熱してベーパーロックが発生することを抑制し易い傾向にある。また、２０μｍ以下であれば、下張り材の熱伝導率が向上し、成形時の結合材の硬化を促進し、優れた強度を示す傾向にある。なお、平均粒子径が前記範囲外の黒鉛を用いてもよい。
The graphite is not particularly limited, and any known graphite, that is, any of natural graphite and artificial graphite can be used. The graphite preferably has an average particle diameter of 1 to 50 μm, more preferably 2 to 40 μm, further preferably 5 to 30 μm, and particularly preferably 10 to 20 μm. When the average particle diameter of the graphite is 1 μm or more, the thermal conductivity of the underlay material is suppressed from excessively increasing, and the frictional heat tends to be transferred to the back plate side to easily suppress the occurrence of vapor lock. is there. When the thickness is 20 μm or less, the thermal conductivity of the underlay material is improved, the curing of the binder at the time of molding is promoted, and the strength tends to be excellent. Note that graphite having an average particle size outside the above range may be used.
下張り材用摩擦材組成物が黒鉛を含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは２～２０質量部、より好ましくは３～１５質量部、さらに好ましくは３～１０質量部である。黒鉛の含有量の上限値は８質量部であってもよい。２質量部以上であれば、下張り材の熱伝導率を向上させ易い傾向にあり、２０質量部以下であれば、下張り材の熱伝導率の過度な上昇を抑えると共に、摩擦係数の低下を抑制し易い傾向にある。
When the friction material composition for underlining material contains graphite, the content is preferably 2 to 20 parts by mass, more preferably 3 to 15 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. More preferably, it is 3 to 10 parts by mass. The upper limit of the graphite content may be 8 parts by mass. When the amount is 2 parts by mass or more, the thermal conductivity of the underlay material tends to be easily improved. When the amount is 20 parts by mass or less, an excessive increase in the thermal conductivity of the underline material is suppressed and a decrease in the friction coefficient is suppressed. It tends to be easy.
本発明の下張り材用摩擦材組成物が硫酸バリウムを含有する場合、その含有量は特に制限されるものではなく、他の成分の配合量と合わせて下張り材用摩擦材組成物の総量を１００質量部に調整するための「残部」に相当する。
When the friction material composition for underlining material of the present invention contains barium sulfate, the content thereof is not particularly limited, and the total amount of the friction material composition for underlining material is 100 in accordance with the blending amount of other components. It corresponds to the "remainder" for adjusting to parts by mass.
本発明の下張り材用摩擦材組成物が無機充填材を含有する場合、その合計含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは２０～７５質量部、より好ましくは３０～７０質量部、さらに好ましくは４０～６５質量部、特に好ましくは４０～６０質量部である。無機充填材の合計含有量を上記範囲とすることで、耐熱性の悪化を避け易い傾向にある。無機充填材の含有量の上限値は、５５質量部であってもよい。
When the friction material composition for underlining material of the present invention contains an inorganic filler, the total content is preferably 20 to 75 parts by mass, more preferably 100 parts by mass of the friction material composition for underlining material. The amount is 30 to 70 parts by mass, more preferably 40 to 65 parts by mass, particularly preferably 40 to 60 parts by mass. By setting the total content of the inorganic filler in the above range, deterioration of heat resistance tends to be easily avoided. The upper limit of the content of the inorganic filler may be 55 parts by mass.
（繊維基材；有機繊維及び無機繊維）
繊維基材は、下張り材において補強作用を示すものである。本発明の下張り材用摩擦材組成物は、繊維基材として、有機繊維及び無機繊維を含有することが好ましい。繊維基材は、１種を単独で使用してもよいし、２種以上を併用してもよい。無機繊維は、下張り材の機械的強度及び耐摩耗性を向上する効果を発現し得るものである。有機繊維とは、有機物を主成分とする繊維状の材料である。 (Fiber base material: organic fiber and inorganic fiber)
The fibrous base material has a reinforcing effect on the underlay material. The friction material composition for underlining material of the present invention preferably contains an organic fiber and an inorganic fiber as a fiber base material. One type of fiber base material may be used alone, or two or more types may be used in combination. Inorganic fibers can exhibit the effect of improving the mechanical strength and wear resistance of the underlay material. The organic fiber is a fibrous material containing an organic substance as a main component.
繊維基材は、下張り材において補強作用を示すものである。本発明の下張り材用摩擦材組成物は、繊維基材として、有機繊維及び無機繊維を含有することが好ましい。繊維基材は、１種を単独で使用してもよいし、２種以上を併用してもよい。無機繊維は、下張り材の機械的強度及び耐摩耗性を向上する効果を発現し得るものである。有機繊維とは、有機物を主成分とする繊維状の材料である。 (Fiber base material: organic fiber and inorganic fiber)
The fibrous base material has a reinforcing effect on the underlay material. The friction material composition for underlining material of the present invention preferably contains an organic fiber and an inorganic fiber as a fiber base material. One type of fiber base material may be used alone, or two or more types may be used in combination. Inorganic fibers can exhibit the effect of improving the mechanical strength and wear resistance of the underlay material. The organic fiber is a fibrous material containing an organic substance as a main component.
－有機繊維－
前記有機繊維としては、麻、木綿、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（架橋構造を有する）等が挙げられる。有機繊維は、１種を単独で使用してもよいし、２種以上を併用してもよい。有機繊維としては、耐熱性の観点から、アラミド繊維が好ましい。また、下張り材の強度向上の観点から、有機繊維として、フィブリル化有機繊維を含有することが好ましく、フィブリル化アラミド繊維を含有することがより好ましい。フィブリル化有機繊維とは、分繊化し、毛羽立ちをもった有機繊維であり、商業的に入手することができる。言うまでもなく、本発明の下張り材用摩擦材組成物は、フィブリル化有機繊維と共にその他の有機繊維を含有していてもよい。
本発明の下張り材用摩擦材組成物が有機繊維（例えば、フィブリル化有機繊維）を含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して１～８質量部であることが好ましく、２～７質量部であることがより好ましく、１～５質量部であることがさらに好ましい。１質量部以上であれば、良好なせん断強度、耐クラック性及び耐摩耗性が発現する傾向にあり、８質量部以下であれば、下張り材用摩擦材組成物中の有機繊維（フィブリル化有機繊維）と他材料の偏在によるせん断強度及び耐クラック性の悪化を効果的に抑制することができる傾向にある。 -Organic fiber-
Examples of the organic fiber include hemp, cotton, aramid fiber, cellulose fiber, acrylic fiber, and phenol resin fiber (having a crosslinked structure). One type of organic fiber may be used alone, or two or more types may be used in combination. As the organic fiber, an aramid fiber is preferable from the viewpoint of heat resistance. Further, from the viewpoint of improving the strength of the underlay material, it is preferable that the organic fibers contain fibrillated organic fibers, and it is more preferable that they contain fibrillated aramid fibers. The fibrillated organic fiber is an organic fiber that has been split and has fluff, and is commercially available. Needless to say, the friction material composition for underlining material of the present invention may contain other organic fibers together with the fibrillated organic fibers.
When the friction material composition for underlining material of the present invention contains an organic fiber (for example, fibrillated organic fiber), the content is 1 to 8 parts by mass based on 100 parts by mass of the friction material composition for underlining material. Preferably, it is 2 to 7 parts by mass, more preferably 1 to 5 parts by mass. When the amount is 1 part by mass or more, good shear strength, crack resistance and abrasion resistance tend to be exhibited, and when the amount is 8 parts by mass or less, the organic fibers (fibrillated organic material) in the friction material composition for underlining material are used. There is a tendency that the deterioration of shear strength and crack resistance due to uneven distribution of the fibers and other materials can be effectively suppressed.
前記有機繊維としては、麻、木綿、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（架橋構造を有する）等が挙げられる。有機繊維は、１種を単独で使用してもよいし、２種以上を併用してもよい。有機繊維としては、耐熱性の観点から、アラミド繊維が好ましい。また、下張り材の強度向上の観点から、有機繊維として、フィブリル化有機繊維を含有することが好ましく、フィブリル化アラミド繊維を含有することがより好ましい。フィブリル化有機繊維とは、分繊化し、毛羽立ちをもった有機繊維であり、商業的に入手することができる。言うまでもなく、本発明の下張り材用摩擦材組成物は、フィブリル化有機繊維と共にその他の有機繊維を含有していてもよい。
本発明の下張り材用摩擦材組成物が有機繊維（例えば、フィブリル化有機繊維）を含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して１～８質量部であることが好ましく、２～７質量部であることがより好ましく、１～５質量部であることがさらに好ましい。１質量部以上であれば、良好なせん断強度、耐クラック性及び耐摩耗性が発現する傾向にあり、８質量部以下であれば、下張り材用摩擦材組成物中の有機繊維（フィブリル化有機繊維）と他材料の偏在によるせん断強度及び耐クラック性の悪化を効果的に抑制することができる傾向にある。 -Organic fiber-
Examples of the organic fiber include hemp, cotton, aramid fiber, cellulose fiber, acrylic fiber, and phenol resin fiber (having a crosslinked structure). One type of organic fiber may be used alone, or two or more types may be used in combination. As the organic fiber, an aramid fiber is preferable from the viewpoint of heat resistance. Further, from the viewpoint of improving the strength of the underlay material, it is preferable that the organic fibers contain fibrillated organic fibers, and it is more preferable that they contain fibrillated aramid fibers. The fibrillated organic fiber is an organic fiber that has been split and has fluff, and is commercially available. Needless to say, the friction material composition for underlining material of the present invention may contain other organic fibers together with the fibrillated organic fibers.
When the friction material composition for underlining material of the present invention contains an organic fiber (for example, fibrillated organic fiber), the content is 1 to 8 parts by mass based on 100 parts by mass of the friction material composition for underlining material. Preferably, it is 2 to 7 parts by mass, more preferably 1 to 5 parts by mass. When the amount is 1 part by mass or more, good shear strength, crack resistance and abrasion resistance tend to be exhibited, and when the amount is 8 parts by mass or less, the organic fibers (fibrillated organic material) in the friction material composition for underlining material are used. There is a tendency that the deterioration of shear strength and crack resistance due to uneven distribution of the fibers and other materials can be effectively suppressed.
－無機繊維－
無機繊維としては、例えば、ガラス繊維、繊維状ウォラストナイト、金属繊維、鉱物繊維、炭素繊維、セラミック繊維、生分解性セラミック繊維、ロックウール、チタン酸カリウム繊維、シリカアルミナ繊維、耐炎化繊維等が挙げられる。
無機繊維は、金属及び金属合金以外の無機物を主成分とする繊維状の材料であることが好ましい。
無機繊維は、１種を単独で使用してもよいし、２種以上を併用してもよい。 -Inorganic fiber-
Examples of the inorganic fiber include glass fiber, fibrous wollastonite, metal fiber, mineral fiber, carbon fiber, ceramic fiber, biodegradable ceramic fiber, rock wool, potassium titanate fiber, silica alumina fiber, and flame resistant fiber. Is mentioned.
The inorganic fiber is preferably a fibrous material mainly containing an inorganic substance other than a metal and a metal alloy.
One type of inorganic fiber may be used alone, or two or more types may be used in combination.
無機繊維としては、例えば、ガラス繊維、繊維状ウォラストナイト、金属繊維、鉱物繊維、炭素繊維、セラミック繊維、生分解性セラミック繊維、ロックウール、チタン酸カリウム繊維、シリカアルミナ繊維、耐炎化繊維等が挙げられる。
無機繊維は、金属及び金属合金以外の無機物を主成分とする繊維状の材料であることが好ましい。
無機繊維は、１種を単独で使用してもよいし、２種以上を併用してもよい。 -Inorganic fiber-
Examples of the inorganic fiber include glass fiber, fibrous wollastonite, metal fiber, mineral fiber, carbon fiber, ceramic fiber, biodegradable ceramic fiber, rock wool, potassium titanate fiber, silica alumina fiber, and flame resistant fiber. Is mentioned.
The inorganic fiber is preferably a fibrous material mainly containing an inorganic substance other than a metal and a metal alloy.
One type of inorganic fiber may be used alone, or two or more types may be used in combination.
ガラス繊維とは、ガラスを溶融及び紡糸して製造した繊維のことを指す。ガラス繊維は、原料がＥガラス、Ｃガラス、Ｓガラス、Ｄガラス等であるものを使用することができ、これらの中でも、特に高強度であるという観点から、Ｅガラス又はＳガラスを含有するガラス繊維を使用することが好ましい。また、結合材との親和性向上のため、ガラス繊維の表面をアミノシラン又はエポキシシラン等で処理したガラス繊維が好ましい。また、原料及び下張り材用摩擦材組成物のハンドリング性向上の観点から、ガラス繊維をウレタン樹脂、アクリル樹脂又はフェノール樹脂等で収束したものを用いることができ、収束本数は５０～１，０００本であることが好ましく、分散性及びハンドリング性のバランスの観点から、５０～５００本であることがより好ましい。
Glass fiber refers to a fiber produced by melting and spinning glass. As the glass fiber, a glass fiber whose raw material is E glass, C glass, S glass, D glass, or the like can be used. Among them, a glass containing E glass or S glass from the viewpoint of particularly high strength. Preferably, fibers are used. Further, glass fibers obtained by treating the surfaces of glass fibers with aminosilane, epoxysilane, or the like are preferable for improving the affinity with the binder. Further, from the viewpoint of improving the handling properties of the raw material and the friction material composition for the underlaying material, a glass fiber obtained by converging a glass fiber with a urethane resin, an acrylic resin, a phenol resin or the like can be used. The number is preferably 50 to 500 from the viewpoint of the balance between dispersibility and handleability.
前記ガラス繊維の平均繊維長は、特に制限されるものではないが、好ましくは８０～６，０００μｍ、より好ましくは１５０～５，０００μｍ、さらに好ましくは３００～５，０００μｍ、特に好ましくは１，０００～５，０００μｍ、最も好ましくは２，０００～４，０００μｍである。平均繊維長が８０μｍ以上であれば、下張り材の強度が向上する傾向にあり、６，０００μｍ以下であれば、分散性の低下が抑制される傾向にある。また、前記ガラス繊維の平均繊維径は、好ましくは５～２０μｍ、より好ましくは７～１５μｍである。平均繊維径が５μｍ以上であれば、下張り材用摩擦材組成物の混合時にガラス繊維が折損することを抑制することができる傾向にあり、２０μｍ以下であれば、下張り材の強度が向上する傾向にある。本明細書において、平均繊維長及び平均繊維径はそれぞれ、用いる無機繊維を無作為に５０個選択し、光学顕微鏡で繊維長及び繊維径を測定し、それから求められる平均値を示すが、市販品であればカタログ値を参照できる。なお、本明細書において、繊維径は、繊維の直径を指す。
The average fiber length of the glass fiber is not particularly limited, but is preferably from 80 to 6,000 μm, more preferably from 150 to 5,000 μm, still more preferably from 300 to 5,000 μm, and particularly preferably from 1,000 to 1,000 μm. 5,000 μm, and most preferably 2,000-4,000 μm. If the average fiber length is 80 μm or more, the strength of the underlay material tends to be improved, and if it is 6,000 μm or less, the decrease in dispersibility tends to be suppressed. The average fiber diameter of the glass fiber is preferably 5 to 20 μm, more preferably 7 to 15 μm. When the average fiber diameter is 5 μm or more, there is a tendency that breakage of the glass fiber during mixing of the friction material composition for underlining material can be suppressed, and when the average fiber diameter is 20 μm or less, the strength of the underlining material tends to improve. It is in. In the present specification, the average fiber length and the average fiber diameter, respectively, randomly select 50 inorganic fibers to be used, measure the fiber length and the fiber diameter with an optical microscope, and show the average value obtained therefrom, If so, you can refer to the catalog value. In addition, in this specification, a fiber diameter points out the diameter of a fiber.
本発明の下張り材用摩擦材組成物がガラス繊維を含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは１～１５質量部、より好ましくは１～１２質量部、さらに好ましくは１～１０質量部である。ガラス繊維の含有量をこの範囲とすることで、混合後の下張り材用摩擦材組成物のハンドリング性を損なうことなく、靭性を付与することができる傾向にあり、そのため、下張り材の強度を向上させることができる傾向にある。
When the friction material composition for underlining material of the present invention contains glass fibers, the content is preferably 1 to 15 parts by mass, more preferably 1 to 15 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. The amount is 12 parts by mass, more preferably 1 to 10 parts by mass. By setting the content of the glass fiber in this range, there is a tendency that the toughness can be imparted without impairing the handleability of the friction material composition for underlining material after mixing, and therefore, the strength of the underlining material is improved. Tend to be able to.
また、前記繊維状ウォラストナイトは、ＣａＳｉＯ３を主成分とする天然に産出されるケイ酸塩鉱物を粉砕分級し、繊維状に加工したものを指す。本発明で使用する繊維状ウォラストナイトの平均アスペクト比（平均繊維長／平均繊維径）は好ましくは８以上であり、より好ましくは８～２０、さらに好ましくは９～２０、特に好ましくは１０～１８である。平均アスペクト比を８以上とすることで、下張り材の常温及び高温におけるせん断強度並びに耐クラック性を効果的に向上させることができる傾向にある。ここで、平均アスペクト比は、ｄ５０値（体積分布の累積中央値）を意味し、例えば、動的画像解析法により測定することができる。
該繊維状ウォラストナイトは、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性の観点から、ガラス繊維と併用することが好ましい。
繊維状ウォラストナイトの平均繊維長は、下張り材への強度付与の観点から、好ましくは２０～１，０００μｍ、より好ましくは４０～８５０μｍ、さらに好ましくは１００～８５０μｍである。繊維状ウォラストナイトの平均繊維径は、下張り材への強度付与の観点から、好ましくは７０μｍ以下、より好ましくは６０μｍ以下である。平均繊維径の下限値に特に制限はないが、好ましくは５μｍ以上、より好ましくは８μｍ以上である。また、結合材との親和性を高めるため、繊維状ウォラストナイトの表面は、アミノシラン、エポキシシラン等で処理されていてもよい。
本発明の下張り材用摩擦材組成物が繊維状ウォラストナイトを含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは２～３０質量部、より好ましくは３～２５質量部、さらに好ましくは５～２５質量部、特に好ましくは５～２０質量部である。２質量部以上であれば、下張り材中に繊維状ウォラストナイトが分散することとなり、下張り材の強度が向上する傾向にある。３０質量部以下であれば、繊維状物質による混合後の下張り材用摩擦材組成物のハンドリング性低下を抑制することができる傾向にある。 Further, the fibrous wollastonite refers to one obtained by pulverizing and classifying a naturally occurring silicate mineral mainly composed of CaSiO 3 and processing it into a fibrous form. The average aspect ratio (average fiber length / average fiber diameter) of the fibrous wollastonite used in the present invention is preferably 8 or more, more preferably 8 to 20, further preferably 9 to 20, and particularly preferably 10 to 20. Eighteen. By setting the average aspect ratio to 8 or more, there is a tendency that the shear strength and the crack resistance at room temperature and high temperature of the underlay material can be effectively improved. Here, the average aspect ratio means a d50 value (cumulative median value of the volume distribution), and can be measured by, for example, a dynamic image analysis method.
The fibrous wollastonite is preferably used in combination with glass fibers from the viewpoint of shear strength at normal and high temperatures, crack resistance and abrasion resistance.
The average fiber length of the fibrous wollastonite is preferably from 20 to 1,000 μm, more preferably from 40 to 850 μm, and still more preferably from 100 to 850 μm, from the viewpoint of imparting strength to the underlaying material. The average fiber diameter of the fibrous wollastonite is preferably 70 μm or less, more preferably 60 μm or less, from the viewpoint of imparting strength to the underlaying material. The lower limit of the average fiber diameter is not particularly limited, but is preferably 5 μm or more, more preferably 8 μm or more. Further, in order to increase the affinity with the binder, the surface of the fibrous wollastonite may be treated with aminosilane, epoxysilane, or the like.
When the friction material composition for underlining material of the present invention contains fibrous wollastonite, the content is preferably 2 to 30 parts by mass, more preferably 100 parts by mass of the friction material composition for underlining material. Is from 3 to 25 parts by mass, more preferably from 5 to 25 parts by mass, particularly preferably from 5 to 20 parts by mass. If the amount is 2 parts by mass or more, the fibrous wollastonite is dispersed in the underlining material, and the strength of the underlining material tends to be improved. When the amount is 30 parts by mass or less, a decrease in the handleability of the friction material composition for underlining material after mixing with the fibrous substance tends to be suppressed.
該繊維状ウォラストナイトは、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性の観点から、ガラス繊維と併用することが好ましい。
繊維状ウォラストナイトの平均繊維長は、下張り材への強度付与の観点から、好ましくは２０～１，０００μｍ、より好ましくは４０～８５０μｍ、さらに好ましくは１００～８５０μｍである。繊維状ウォラストナイトの平均繊維径は、下張り材への強度付与の観点から、好ましくは７０μｍ以下、より好ましくは６０μｍ以下である。平均繊維径の下限値に特に制限はないが、好ましくは５μｍ以上、より好ましくは８μｍ以上である。また、結合材との親和性を高めるため、繊維状ウォラストナイトの表面は、アミノシラン、エポキシシラン等で処理されていてもよい。
本発明の下張り材用摩擦材組成物が繊維状ウォラストナイトを含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは２～３０質量部、より好ましくは３～２５質量部、さらに好ましくは５～２５質量部、特に好ましくは５～２０質量部である。２質量部以上であれば、下張り材中に繊維状ウォラストナイトが分散することとなり、下張り材の強度が向上する傾向にある。３０質量部以下であれば、繊維状物質による混合後の下張り材用摩擦材組成物のハンドリング性低下を抑制することができる傾向にある。 Further, the fibrous wollastonite refers to one obtained by pulverizing and classifying a naturally occurring silicate mineral mainly composed of CaSiO 3 and processing it into a fibrous form. The average aspect ratio (average fiber length / average fiber diameter) of the fibrous wollastonite used in the present invention is preferably 8 or more, more preferably 8 to 20, further preferably 9 to 20, and particularly preferably 10 to 20. Eighteen. By setting the average aspect ratio to 8 or more, there is a tendency that the shear strength and the crack resistance at room temperature and high temperature of the underlay material can be effectively improved. Here, the average aspect ratio means a d50 value (cumulative median value of the volume distribution), and can be measured by, for example, a dynamic image analysis method.
The fibrous wollastonite is preferably used in combination with glass fibers from the viewpoint of shear strength at normal and high temperatures, crack resistance and abrasion resistance.
The average fiber length of the fibrous wollastonite is preferably from 20 to 1,000 μm, more preferably from 40 to 850 μm, and still more preferably from 100 to 850 μm, from the viewpoint of imparting strength to the underlaying material. The average fiber diameter of the fibrous wollastonite is preferably 70 μm or less, more preferably 60 μm or less, from the viewpoint of imparting strength to the underlaying material. The lower limit of the average fiber diameter is not particularly limited, but is preferably 5 μm or more, more preferably 8 μm or more. Further, in order to increase the affinity with the binder, the surface of the fibrous wollastonite may be treated with aminosilane, epoxysilane, or the like.
When the friction material composition for underlining material of the present invention contains fibrous wollastonite, the content is preferably 2 to 30 parts by mass, more preferably 100 parts by mass of the friction material composition for underlining material. Is from 3 to 25 parts by mass, more preferably from 5 to 25 parts by mass, particularly preferably from 5 to 20 parts by mass. If the amount is 2 parts by mass or more, the fibrous wollastonite is dispersed in the underlining material, and the strength of the underlining material tends to be improved. When the amount is 30 parts by mass or less, a decrease in the handleability of the friction material composition for underlining material after mixing with the fibrous substance tends to be suppressed.
前記金属繊維としては、アルミニウム、鉄、亜鉛、錫、チタン、ニッケル、マグネシウム等の金属単体又は合金形態の繊維、鋳鉄等の金属を主成分とする繊維などが挙げられる。合金形態の繊維（合金繊維）としては、鉄合金繊維、アルミニウム合金繊維等が挙げられる。金属繊維は１種を単独で使用してもよいし、２種以上を併用してもよい。本発明においては、金属繊維を含有しない下張り材用摩擦材組成物が好ましい。
強度向上、摩擦係数の安定化、熱伝導率の向上、耐クラック性及び耐摩耗性の向上の観点からは、一般的には、銅繊維、銅合金繊維、鉄繊維及び鉄合金繊維が好まれる。しかし、銅繊維又は銅合金繊維を含有させる場合、前述の通り環境汚染の問題を有するため、本発明では、下張り材用摩擦材組成物中における銅の含有量は、銅元素として０．５質量％未満とし、好ましくは０．３質量％以下、より好ましくは０．１質量％以下、さらに好ましくは実質的に銅を含まない態様である。なお、銅合金繊維としては、銅繊維、黄銅繊維、青銅繊維等が挙げられる。
また、鉄繊維又は鉄合金繊維を含有させる場合、裏金との接着界面での発錆による耐久性低下を抑制するため、本発明では、下張り材用摩擦材組成物中における鉄の含有量は、鉄元素として０．５質量％未満とすることが好ましく、より好ましくは０．３質量％以下、さらに好ましくは０．１質量％以下、特に好ましくは実質的に鉄を含まない態様である。 Examples of the metal fibers include fibers in the form of a single metal or alloy such as aluminum, iron, zinc, tin, titanium, nickel and magnesium, and fibers mainly containing a metal such as cast iron. Examples of the alloy-type fiber (alloy fiber) include an iron alloy fiber and an aluminum alloy fiber. One type of metal fiber may be used alone, or two or more types may be used in combination. In the present invention, a friction material composition for a subbing material containing no metal fibers is preferable.
From the viewpoint of improving strength, stabilizing the coefficient of friction, improving thermal conductivity, and improving crack resistance and wear resistance, copper fibers, copper alloy fibers, iron fibers and iron alloy fibers are generally preferred. . However, when copper fibers or copper alloy fibers are contained, there is a problem of environmental pollution as described above.In the present invention, the content of copper in the friction material composition for underlaying material is 0.5 mass% as a copper element. %, Preferably 0.3% by mass or less, more preferably 0.1% by mass or less, and further preferably substantially contains no copper. In addition, as a copper alloy fiber, a copper fiber, a brass fiber, a bronze fiber, etc. are mentioned.
Further, when containing iron fibers or iron alloy fibers, in order to suppress a decrease in durability due to rust at the bonding interface with the back metal, in the present invention, the content of iron in the friction material composition for underlining material, The iron element is preferably less than 0.5% by mass, more preferably 0.3% by mass or less, further preferably 0.1% by mass or less, and particularly preferably substantially no iron.
強度向上、摩擦係数の安定化、熱伝導率の向上、耐クラック性及び耐摩耗性の向上の観点からは、一般的には、銅繊維、銅合金繊維、鉄繊維及び鉄合金繊維が好まれる。しかし、銅繊維又は銅合金繊維を含有させる場合、前述の通り環境汚染の問題を有するため、本発明では、下張り材用摩擦材組成物中における銅の含有量は、銅元素として０．５質量％未満とし、好ましくは０．３質量％以下、より好ましくは０．１質量％以下、さらに好ましくは実質的に銅を含まない態様である。なお、銅合金繊維としては、銅繊維、黄銅繊維、青銅繊維等が挙げられる。
また、鉄繊維又は鉄合金繊維を含有させる場合、裏金との接着界面での発錆による耐久性低下を抑制するため、本発明では、下張り材用摩擦材組成物中における鉄の含有量は、鉄元素として０．５質量％未満とすることが好ましく、より好ましくは０．３質量％以下、さらに好ましくは０．１質量％以下、特に好ましくは実質的に鉄を含まない態様である。 Examples of the metal fibers include fibers in the form of a single metal or alloy such as aluminum, iron, zinc, tin, titanium, nickel and magnesium, and fibers mainly containing a metal such as cast iron. Examples of the alloy-type fiber (alloy fiber) include an iron alloy fiber and an aluminum alloy fiber. One type of metal fiber may be used alone, or two or more types may be used in combination. In the present invention, a friction material composition for a subbing material containing no metal fibers is preferable.
From the viewpoint of improving strength, stabilizing the coefficient of friction, improving thermal conductivity, and improving crack resistance and wear resistance, copper fibers, copper alloy fibers, iron fibers and iron alloy fibers are generally preferred. . However, when copper fibers or copper alloy fibers are contained, there is a problem of environmental pollution as described above.In the present invention, the content of copper in the friction material composition for underlaying material is 0.5 mass% as a copper element. %, Preferably 0.3% by mass or less, more preferably 0.1% by mass or less, and further preferably substantially contains no copper. In addition, as a copper alloy fiber, a copper fiber, a brass fiber, a bronze fiber, etc. are mentioned.
Further, when containing iron fibers or iron alloy fibers, in order to suppress a decrease in durability due to rust at the bonding interface with the back metal, in the present invention, the content of iron in the friction material composition for underlining material, The iron element is preferably less than 0.5% by mass, more preferably 0.3% by mass or less, further preferably 0.1% by mass or less, and particularly preferably substantially no iron.
前記鉱物繊維は、スラグウール等の高炉スラグ、バサルトファイバー等の玄武岩、その他の天然岩石等を主成分として溶融紡糸した人造無機繊維である。鉱物繊維としては、例えば、ＳｉＯ２、Ａｌ２Ｏ３、ＣａＯ、ＭｇＯ、ＦｅＯ、Ｎａ２Ｏ等を含有する鉱物繊維、又はこれら化合物を１種もしくは２種以上含有する鉱物繊維等が挙げられる。鉱物繊維としては、アルミニウム元素を含む鉱物繊維が好ましく、Ａｌ２Ｏ３を含有する鉱物繊維がより好ましく、Ａｌ２Ｏ３とＳｉＯ２とを含有する鉱物繊維がさらに好ましい。
下張り材用摩擦材組成物中に含まれる鉱物繊維の平均繊維長が大きくなるほど、せん断強度が低下する傾向にある。そのため、鉱物繊維の平均繊維長は、好ましくは５００μｍ以下、より好ましくは１００～４００μｍ、さらに好ましくは１２０～３４０μｍである。また、鉱物繊維の平均繊維径（直径）には特に制限はないが、通常、１～２０μｍであり、２～１５μｍであってもよい。 The mineral fibers are artificial inorganic fibers melt-spun with blast furnace slag such as slag wool, basalt such as basalt fiber, and other natural rocks as main components. Examples of the mineral fiber include a mineral fiber containing SiO 2 , Al 2 O 3 , CaO, MgO, FeO, Na 2 O, etc., or a mineral fiber containing one or more of these compounds. As the mineral fiber, a mineral fiber containing an aluminum element is preferred, a mineral fiber containing Al 2 O 3 is more preferred, and a mineral fiber containing Al 2 O 3 and SiO 2 is even more preferred.
The shear strength tends to decrease as the average fiber length of the mineral fibers included in the friction material composition for underlining materials increases. Therefore, the average fiber length of the mineral fibers is preferably 500 μm or less, more preferably 100 to 400 μm, and further preferably 120 to 340 μm. The average fiber diameter (diameter) of the mineral fibers is not particularly limited, but is usually 1 to 20 μm, and may be 2 to 15 μm.
下張り材用摩擦材組成物中に含まれる鉱物繊維の平均繊維長が大きくなるほど、せん断強度が低下する傾向にある。そのため、鉱物繊維の平均繊維長は、好ましくは５００μｍ以下、より好ましくは１００～４００μｍ、さらに好ましくは１２０～３４０μｍである。また、鉱物繊維の平均繊維径（直径）には特に制限はないが、通常、１～２０μｍであり、２～１５μｍであってもよい。 The mineral fibers are artificial inorganic fibers melt-spun with blast furnace slag such as slag wool, basalt such as basalt fiber, and other natural rocks as main components. Examples of the mineral fiber include a mineral fiber containing SiO 2 , Al 2 O 3 , CaO, MgO, FeO, Na 2 O, etc., or a mineral fiber containing one or more of these compounds. As the mineral fiber, a mineral fiber containing an aluminum element is preferred, a mineral fiber containing Al 2 O 3 is more preferred, and a mineral fiber containing Al 2 O 3 and SiO 2 is even more preferred.
The shear strength tends to decrease as the average fiber length of the mineral fibers included in the friction material composition for underlining materials increases. Therefore, the average fiber length of the mineral fibers is preferably 500 μm or less, more preferably 100 to 400 μm, and further preferably 120 to 340 μm. The average fiber diameter (diameter) of the mineral fibers is not particularly limited, but is usually 1 to 20 μm, and may be 2 to 15 μm.
鉱物繊維は、人体有害性の観点から、生体溶解性であることが好ましい。ここでいう生体溶解性の鉱物繊維とは、人体内に取り込まれた場合でも短時間で一部分解され体外に排出される特徴を有する鉱物繊維である。具体的には、化学組成が、アルカリ酸化物及びアルカリ土類酸化物の総量（ナトリウム、カリウム、カルシウム、マグネシウム及びバリウムの酸化物の総量）が１８質量％以上で、且つ、（ａ）短期吸入暴露による生体内耐久試験で、長さが２０μｍ超の繊維の半減期が１０日未満であること、（ｂ）短期気管内注入による生体内耐久試験で、長さが２０μｍ超の繊維の半減期が４０日未満であること、（ｃ）腹腔内投与試験で有意な発ガン性が無いこと、又は、（ｄ）長期吸入暴露試験で発ガン性と結びつく病理所見又は腫瘍形成が無いこと、のいずれかを満たす繊維（ＥＵ指令９７／６９／ＥＣのＮｏｔａ Ｑ（発癌性適用除外）参照）を示す。このような生体分解性鉱物繊維としては、ＳｉＯ２－Ａｌ２Ｏ３－ＣａＯ－ＭｇＯ－ＦｅＯ（－Ｋ２Ｏ－Ｎａ２Ｏ）系繊維等が挙げられ、ＳｉＯ２、Ａｌ２Ｏ３、ＣａＯ、ＭｇＯ、ＦｅＯ、Ｋ２Ｏ及びＮａ２Ｏ等から選択される少なくとも２種を任意の組み合わせで含有する鉱物繊維が挙げられる。
The mineral fibers are preferably biosoluble from the viewpoint of harmful effects on the human body. The term "biosoluble mineral fiber" as used herein refers to a mineral fiber that has the characteristic of being partially decomposed in a short time and discharged out of the body even when taken into the human body. Specifically, the chemical composition is such that the total amount of alkali oxides and alkaline earth oxides (total amount of sodium, potassium, calcium, magnesium and barium oxides) is 18% by mass or more, and (a) short-term inhalation The half-life of a fiber having a length of more than 20 μm is less than 10 days in an in vivo durability test by exposure, and (b) a half-life of a fiber having a length of more than 20 μm in an in vivo durability test by short-term intratracheal injection. Less than 40 days, (c) no significant carcinogenicity in the intraperitoneal administration test, or (d) no pathological findings or tumor formation associated with carcinogenicity in the long-term inhalation exposure test. Fibers satisfying either (see EU Directive 97/69 / EC, Nota Q (exclusion of carcinogenicity)). Examples of such biodegradable mineral fibers include SiO 2 —Al 2 O 3 —CaO—MgO—FeO (—K 2 O—Na 2 O) fibers and the like, and include SiO 2 , Al 2 O 3 , and CaO. , MgO, FeO, K 2 O, Na 2 O and the like.
本発明の下張り材用摩擦材組成物が鉱物繊維を含有する場合、その含有量は、下張り材用摩擦材組成物中、３～４０質量％であることが好ましく、８～３０質量％であることがより好ましく、１０～３０質量％であることがさらに好ましく、１０～２０質量％であることが特に好ましい。
When the friction material composition for underlining material of the present invention contains mineral fibers, its content is preferably 3 to 40% by mass, and more preferably 8 to 30% by mass in the friction material composition for underlining material. More preferably, it is 10 to 30% by mass, particularly preferably 10 to 20% by mass.
前記炭素繊維としては、耐炎化繊維、ピッチ系炭素繊維、ＰＡＮ系炭素繊維、活性炭繊維等が挙げられる。炭素繊維は、１種を単独で使用してもよいし、２種以上を併用してもよい。炭素繊維の平均繊維長に特に制限はないが、好ましくは０．１～６．０ｍｍ、より好ましくは０．１～３．０ｍｍである。平均繊維長が前記範囲であれば下張り材が欠けにくく、強度が保たれ易い傾向にある。また、炭素繊維の平均繊維径に特に制限はないが、好ましくは５～２０μｍである。
Examples of the carbon fibers include flame-resistant fibers, pitch-based carbon fibers, PAN-based carbon fibers, and activated carbon fibers. One type of carbon fiber may be used alone, or two or more types may be used in combination. The average fiber length of the carbon fibers is not particularly limited, but is preferably 0.1 to 6.0 mm, and more preferably 0.1 to 3.0 mm. When the average fiber length is in the above range, the underlay material is not easily chipped and the strength tends to be easily maintained. The average fiber diameter of the carbon fibers is not particularly limited, but is preferably 5 to 20 μm.
下張り材用摩擦材組成物が繊維基材を含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは５～４０質量部、より好ましくは５～２０質量部、さらに好ましくは５～１５質量部である。繊維基材の含有量を上記範囲とすることで、下張り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、耐摩耗性を向上し、さらに成形性を向上させることができる傾向にある。
When the friction material composition for underlining material contains a fibrous base material, the content is preferably 5 to 40 parts by mass, more preferably 5 to 20 parts by mass, based on 100 parts by mass of the friction material composition for underlining material. Parts, more preferably 5 to 15 parts by mass. By setting the content of the fibrous base material within the above range, an optimum porosity as an underlay material can be obtained, squeal can be prevented, appropriate material strength can be obtained, abrasion resistance can be improved, and formability can be further improved. There is a tendency that can be improved.
（結合材）
結合材は、下張り材用摩擦材組成物に含まれ得る有機充填材、無機充填材及び繊維基材等を結合して一体化し、所定の形状と強度を与える機能を有する。本発明の下張り材用摩擦材組成物に含まれる結合材に特に制限はないが、下張り材の結合材として一般的に用いられる熱硬化性樹脂を用いることができる。
該熱硬化性樹脂としては、例えば、フェノール樹脂、変性フェノール樹脂、エラストマー分散フェノール樹脂、エポキシ樹脂、ポリイミド樹脂、メラミン樹脂等が挙げられる。ここで、変性フェノール樹脂としては、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等が挙げられる。エラストマー分散フェノール樹脂としては、アクリルエラストマー分散フェノール樹脂、シリコーンエラストマー分散フェノール樹脂等、ニトリルブタジエンエラストマー分散フェノール樹脂が挙げられる。
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、アクリルエラストマー分散フェノール樹脂、シリコーンエラストマー分散フェノール樹脂、ニトリルブタジエンエラストマー分散フェノール樹脂が好ましく、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、シリコーンエラストマー分散フェノール樹脂、ニトリルブタジエンエラストマー分散フェノール樹脂がより好ましく、フェノール樹脂がさらに好ましい。
熱硬化性樹脂は、１種を単独で使用してもよいし、２種以上を併用してもよい。 (Binder)
The binder has a function of binding and integrating an organic filler, an inorganic filler, a fiber base material, and the like, which can be included in the friction material composition for an underlining material, and giving a predetermined shape and strength. The binder contained in the friction material composition for underlining material of the present invention is not particularly limited, but a thermosetting resin generally used as a binding material for underlining material can be used.
Examples of the thermosetting resin include a phenol resin, a modified phenol resin, an elastomer-dispersed phenol resin, an epoxy resin, a polyimide resin, and a melamine resin. Here, examples of the modified phenol resin include an acrylic-modified phenol resin, a silicone-modified phenol resin, a cashew-modified phenol resin, an epoxy-modified phenol resin, and an alkylbenzene-modified phenol resin. Examples of the elastomer-dispersed phenolic resin include a nitrile-butadiene elastomer-dispersed phenolic resin such as an acrylic elastomer-dispersed phenolic resin and a silicone elastomer-dispersed phenolic resin.
In particular, phenolic resin, acrylic-modified phenolic resin, silicone-modified phenolic resin, alkylbenzene-modified phenolic resin, acryl-elastomer-dispersed phenolic resin, silicone-elastomer-dispersed phenolic resin, and nitrile-butadiene elastomer provide good heat resistance, moldability and friction coefficient. A dispersed phenol resin is preferred, a phenol resin, an acrylic elastomer dispersed phenol resin, a silicone elastomer dispersed phenol resin, and a nitrile butadiene elastomer dispersed phenol resin are more preferred, and a phenol resin is even more preferred.
One thermosetting resin may be used alone, or two or more thermosetting resins may be used in combination.
結合材は、下張り材用摩擦材組成物に含まれ得る有機充填材、無機充填材及び繊維基材等を結合して一体化し、所定の形状と強度を与える機能を有する。本発明の下張り材用摩擦材組成物に含まれる結合材に特に制限はないが、下張り材の結合材として一般的に用いられる熱硬化性樹脂を用いることができる。
該熱硬化性樹脂としては、例えば、フェノール樹脂、変性フェノール樹脂、エラストマー分散フェノール樹脂、エポキシ樹脂、ポリイミド樹脂、メラミン樹脂等が挙げられる。ここで、変性フェノール樹脂としては、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等が挙げられる。エラストマー分散フェノール樹脂としては、アクリルエラストマー分散フェノール樹脂、シリコーンエラストマー分散フェノール樹脂等、ニトリルブタジエンエラストマー分散フェノール樹脂が挙げられる。
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、アクリルエラストマー分散フェノール樹脂、シリコーンエラストマー分散フェノール樹脂、ニトリルブタジエンエラストマー分散フェノール樹脂が好ましく、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、シリコーンエラストマー分散フェノール樹脂、ニトリルブタジエンエラストマー分散フェノール樹脂がより好ましく、フェノール樹脂がさらに好ましい。
熱硬化性樹脂は、１種を単独で使用してもよいし、２種以上を併用してもよい。 (Binder)
The binder has a function of binding and integrating an organic filler, an inorganic filler, a fiber base material, and the like, which can be included in the friction material composition for an underlining material, and giving a predetermined shape and strength. The binder contained in the friction material composition for underlining material of the present invention is not particularly limited, but a thermosetting resin generally used as a binding material for underlining material can be used.
Examples of the thermosetting resin include a phenol resin, a modified phenol resin, an elastomer-dispersed phenol resin, an epoxy resin, a polyimide resin, and a melamine resin. Here, examples of the modified phenol resin include an acrylic-modified phenol resin, a silicone-modified phenol resin, a cashew-modified phenol resin, an epoxy-modified phenol resin, and an alkylbenzene-modified phenol resin. Examples of the elastomer-dispersed phenolic resin include a nitrile-butadiene elastomer-dispersed phenolic resin such as an acrylic elastomer-dispersed phenolic resin and a silicone elastomer-dispersed phenolic resin.
In particular, phenolic resin, acrylic-modified phenolic resin, silicone-modified phenolic resin, alkylbenzene-modified phenolic resin, acryl-elastomer-dispersed phenolic resin, silicone-elastomer-dispersed phenolic resin, and nitrile-butadiene elastomer provide good heat resistance, moldability and friction coefficient. A dispersed phenol resin is preferred, a phenol resin, an acrylic elastomer dispersed phenol resin, a silicone elastomer dispersed phenol resin, and a nitrile butadiene elastomer dispersed phenol resin are more preferred, and a phenol resin is even more preferred.
One thermosetting resin may be used alone, or two or more thermosetting resins may be used in combination.
下張り材用摩擦材組成物が結合材を含有する場合、その含有量は、下張り材用摩擦材組成物１００質量部に対して、好ましくは５～２５質量部、より好ましくは５～２０質量部、さらに好ましくは６～１８質量部、特に好ましくは８～１６質量部である。結合材の含有量を上記範囲とすることで、下張り材の強度を保ち、弾性率が高くなることによる鳴き等の制振性悪化をより抑制できる傾向にある。
When the friction material composition for underlining material contains a binder, the content is preferably 5 to 25 parts by mass, more preferably 5 to 20 parts by mass with respect to 100 parts by mass of the friction material composition for underlining material. More preferably, it is 6 to 18 parts by mass, particularly preferably 8 to 16 parts by mass. By setting the content of the binder in the above range, there is a tendency that the strength of the underlaying material is maintained, and deterioration of vibration damping properties such as squealing due to an increase in elastic modulus can be further suppressed.
（その他の材料）
本発明の下張り材用摩擦材組成物は、前記のモース硬度６．３以上の研削材、有機充填材、無機充填材、繊維基材及び結合材以外に、必要に応じてその他の材料を配合することができる。
その他の材料としては、例えば、耐摩耗性及び熱フェード特性向上の観点から、亜鉛粉及びアルミ等の金属粉末；ポリテトラフルオロエチレン（ＰＴＦＥ）等のフッ素系ポリマー、などの有機添加剤が挙げられる。
本発明の下張り材用摩擦材組成物が上記その他の材料を含有する場合、その含有量としては、有機充填材、無機充填材、繊維基材、モース硬度６．３以上の研削材及び結合材の総量１００質量部に対して、それぞれ、好ましくは２０質量部以下、より好ましくは１０質量部以下、さらに好ましくは５質量部以下、特に好ましくは３質量部以下であり、その他の材料を含有していなくてもよい。 (Other materials)
The friction material composition for underlaying material of the present invention may further contain other materials as required in addition to the above-mentioned abrasive having an Mohs hardness of 6.3 or more, an organic filler, an inorganic filler, a fiber base material and a binder. can do.
Examples of other materials include organic additives such as metal powders such as zinc powder and aluminum; and fluorine-based polymers such as polytetrafluoroethylene (PTFE), from the viewpoint of improving abrasion resistance and thermal fade characteristics. .
When the friction material composition for underlining material of the present invention contains the above-mentioned other materials, the content may be an organic filler, an inorganic filler, a fiber base material, a abrasive having a Mohs hardness of 6.3 or more, and a binder. Is preferably not more than 20 parts by mass, more preferably not more than 10 parts by mass, further preferably not more than 5 parts by mass, particularly preferably not more than 3 parts by mass with respect to 100 parts by mass of the total amount of You do not have to.
本発明の下張り材用摩擦材組成物は、前記のモース硬度６．３以上の研削材、有機充填材、無機充填材、繊維基材及び結合材以外に、必要に応じてその他の材料を配合することができる。
その他の材料としては、例えば、耐摩耗性及び熱フェード特性向上の観点から、亜鉛粉及びアルミ等の金属粉末；ポリテトラフルオロエチレン（ＰＴＦＥ）等のフッ素系ポリマー、などの有機添加剤が挙げられる。
本発明の下張り材用摩擦材組成物が上記その他の材料を含有する場合、その含有量としては、有機充填材、無機充填材、繊維基材、モース硬度６．３以上の研削材及び結合材の総量１００質量部に対して、それぞれ、好ましくは２０質量部以下、より好ましくは１０質量部以下、さらに好ましくは５質量部以下、特に好ましくは３質量部以下であり、その他の材料を含有していなくてもよい。 (Other materials)
The friction material composition for underlaying material of the present invention may further contain other materials as required in addition to the above-mentioned abrasive having an Mohs hardness of 6.3 or more, an organic filler, an inorganic filler, a fiber base material and a binder. can do.
Examples of other materials include organic additives such as metal powders such as zinc powder and aluminum; and fluorine-based polymers such as polytetrafluoroethylene (PTFE), from the viewpoint of improving abrasion resistance and thermal fade characteristics. .
When the friction material composition for underlining material of the present invention contains the above-mentioned other materials, the content may be an organic filler, an inorganic filler, a fiber base material, a abrasive having a Mohs hardness of 6.3 or more, and a binder. Is preferably not more than 20 parts by mass, more preferably not more than 10 parts by mass, further preferably not more than 5 parts by mass, particularly preferably not more than 3 parts by mass with respect to 100 parts by mass of the total amount of You do not have to.
図１を用いて説明すると、上張り材用摩擦材組成物と本発明の下張り材用摩擦材組成物とを、一般に使用されている方法、好ましくは加熱加圧成形によって成形することで、上張り材（一般的には、単に摩擦材とも称される。）１と下張り材２とを一体化することができる。上張り材用摩擦材組成物としては、公知の摩擦材組成物、特に上張り材用摩擦材組成物を利用することができ、特に制限はない。上張り材用摩擦材組成物としては、具体的には、有機充填材、無機充填材、繊維基材及び結合材を含有する上張り材用摩擦材組成物であって、該上張り材用摩擦材組成物は、銅を含まないか、又は銅を含んでいても該銅の含有率は銅元素として０．５質量％未満であることが好ましい。有機充填材、無機充填材、繊維基材及び結合材については、下張り材用摩擦材組成物において説明したものと同様のものを使用することができる。
摩擦面から垂直方向に見たとき、上張り材（摩擦材）１と下張り材２との合計厚みに対する下張り材の厚みの割合は３～７０％であることが好ましく、５～６０％であることがより好ましく、６～５０％であることがさらに好ましい。 Explaining with reference to FIG. 1, the friction material composition for an upholstery material and the friction material composition for an underlay material of the present invention are molded by a generally used method, preferably by heat and pressure molding. The upholstery material (generally, simply referred to as a friction material) 1 and thelower lining material 2 can be integrated. As the friction material composition for an overlay, a known friction material composition, in particular, a friction material composition for an overlay can be used, and there is no particular limitation. Specific examples of the friction material composition for an overlay material include a friction material composition for an overlay material containing an organic filler, an inorganic filler, a fiber base material, and a binder. The friction material composition preferably does not contain copper, or even if it contains copper, the content of copper is preferably less than 0.5% by mass as a copper element. As the organic filler, the inorganic filler, the fiber base material, and the binder, the same ones as described in the friction material composition for the underlay material can be used.
When viewed in the vertical direction from the friction surface, the ratio of the thickness of the underlining material to the total thickness of the uppering material (friction material) 1 and the underliningmaterial 2 is preferably 3 to 70%, and more preferably 5 to 60%. More preferably, it is still more preferably 6 to 50%.
摩擦面から垂直方向に見たとき、上張り材（摩擦材）１と下張り材２との合計厚みに対する下張り材の厚みの割合は３～７０％であることが好ましく、５～６０％であることがより好ましく、６～５０％であることがさらに好ましい。 Explaining with reference to FIG. 1, the friction material composition for an upholstery material and the friction material composition for an underlay material of the present invention are molded by a generally used method, preferably by heat and pressure molding. The upholstery material (generally, simply referred to as a friction material) 1 and the
When viewed in the vertical direction from the friction surface, the ratio of the thickness of the underlining material to the total thickness of the uppering material (friction material) 1 and the underlining
より詳細には、上張り材用摩擦材組成物と本発明の下張り材用摩擦材組成物をそれぞれ別々に、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混合し、上張り材用混合物と下張り材用混合物とを成形金型にて一体で予備成形し、次いで、得られた予備成形物を例えば成形温度１３０～１６０℃、成形圧力２０～５０ＭＰａの条件で２～１０分間で成形し、得られた成形物を例えば１５０～２５０℃で２～１０時間熱処理することで、上張り材（摩擦材）１と下張り材２とを一体化することができる。また、必要に応じて、塗装、スコーチ処理、研磨処理を行ってもよい。上記工程の中で、予備成形工程を省略して混合物を直接熱成形してもよい。
More specifically, the friction material composition for an overlay material and the friction material composition for an underlay material of the present invention are separately prepared by using a Reidige mixer (“Redige” is a registered trademark), a pressure kneader, an Erich mixer ( "Eirich" is a registered trademark) mixed using a mixer such as, the mixture for the upper material and the mixture for the lower material are preformed integrally in a molding die, and then, the obtained preformed product is, for example, Molding is performed at a molding temperature of 130 to 160 ° C. under a molding pressure of 20 to 50 MPa for 2 to 10 minutes, and the obtained molded product is heat-treated at, for example, 150 to 250 ° C. for 2 to 10 hours, so that an upper material (friction material 1) and the underlaying material 2 can be integrated. Moreover, you may perform a coating, a scorch process, and a grinding | polishing process as needed. In the above steps, the mixture may be directly thermoformed without the preforming step.
［摩擦部材］
図１を参照しながら説明すると、本発明の下張り材用摩擦材組成物は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を有するため、摩擦部材５の下張り材２として用いることができる。ここで、上張り材（摩擦材）１は、摩擦部材の摩擦面となる摩擦材であり、下張り材２は、摩擦部材の摩擦面となる上張り材（摩擦材）１と裏金３との間に介在する、上張り材（摩擦材）１と裏金３との接着部付近のせん断強度及び耐クラック性向上を目的とした層のことである。
具体的には、本発明は、上張り材（摩擦材）１と、裏金３と、前記上張り材（摩擦材）１と前記裏金３との間に本発明の下張り材用摩擦材組成物を成形してなる下張り材２を有する、摩擦部材５も提供する。
本発明の摩擦部材は、本発明の下張り材を用いながら、上張り材が摩擦面となるように形成した摩擦部材であって、つまり、下張り材が摩擦面とは反対側に位置する摩擦部材である。本発明の摩擦部材としては、上記態様に限らず、例えば、（１）上張り材（摩擦材）１と裏金３と下張り材２とを有し、該裏金３上に、下張り材２を介して上張り材１が摩擦面側に位置するように設けられた摩擦部材５（上記態様と同じ。）、及び（２）前記（１）の構成の摩擦部材５において、裏金３と下張り材２との間に、裏金３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を介在させた摩擦部材等が挙げられる。さらに、（３）上記（１）又は（２）の構成の摩擦部材５における前記裏金３において、前記下張り材２を有する側とは反対側にシム４を有する摩擦部材も挙げられる。該シム４は、一般的に摩擦部材の制振性向上のために用いられるスペーサーである。 [Friction member]
Explaining with reference to FIG. 1, the friction material composition for underlining material of the present invention has excellent friction performance while improving shear strength, crack resistance and abrasion resistance at ordinary temperature and high temperature, It can be used as the underliningmaterial 2 of the friction member 5. Here, the upper lining material (friction material) 1 is a friction material serving as a friction surface of the friction member, and the lower lining material 2 is formed of the upper lining material (friction material) 1 serving as the friction surface of the friction member and the back metal 3. It is a layer interposed therebetween for the purpose of improving the shear strength and crack resistance near the bonding portion between the overlay material (friction material) 1 and the back metal 3.
Specifically, the present invention provides an underlining material friction material composition of the present invention between an overlining material (friction material) 1, abacking metal 3, and the overlining material (frictional material) 1 and the backing metal 3. Also provided is a friction member 5 having a base material 2 formed by molding.
The friction member of the present invention is a friction member formed by using the underlining material of the present invention so that the upper surface becomes a friction surface, that is, the friction member in which the underlining material is located on the opposite side to the friction surface. It is. The friction member of the present invention is not limited to the above-described embodiment, and includes, for example, (1) an upper lining material (friction material) 1, aback metal 3, and a lower lining material 2. (2) In the friction member 5 having the configuration (1), the back metal 3 and the underlining material 2 are provided. And a friction member or the like in which a primer layer for the purpose of surface modification for enhancing the adhesion effect of the back metal 3 is interposed. Further, (3) a friction member having a shim 4 on a side opposite to a side having the underlining material 2 in the back metal 3 in the friction member 5 having the configuration of the above (1) or (2) is also included. The shim 4 is a spacer generally used for improving the vibration damping of the friction member.
図１を参照しながら説明すると、本発明の下張り材用摩擦材組成物は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を有するため、摩擦部材５の下張り材２として用いることができる。ここで、上張り材（摩擦材）１は、摩擦部材の摩擦面となる摩擦材であり、下張り材２は、摩擦部材の摩擦面となる上張り材（摩擦材）１と裏金３との間に介在する、上張り材（摩擦材）１と裏金３との接着部付近のせん断強度及び耐クラック性向上を目的とした層のことである。
具体的には、本発明は、上張り材（摩擦材）１と、裏金３と、前記上張り材（摩擦材）１と前記裏金３との間に本発明の下張り材用摩擦材組成物を成形してなる下張り材２を有する、摩擦部材５も提供する。
本発明の摩擦部材は、本発明の下張り材を用いながら、上張り材が摩擦面となるように形成した摩擦部材であって、つまり、下張り材が摩擦面とは反対側に位置する摩擦部材である。本発明の摩擦部材としては、上記態様に限らず、例えば、（１）上張り材（摩擦材）１と裏金３と下張り材２とを有し、該裏金３上に、下張り材２を介して上張り材１が摩擦面側に位置するように設けられた摩擦部材５（上記態様と同じ。）、及び（２）前記（１）の構成の摩擦部材５において、裏金３と下張り材２との間に、裏金３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を介在させた摩擦部材等が挙げられる。さらに、（３）上記（１）又は（２）の構成の摩擦部材５における前記裏金３において、前記下張り材２を有する側とは反対側にシム４を有する摩擦部材も挙げられる。該シム４は、一般的に摩擦部材の制振性向上のために用いられるスペーサーである。 [Friction member]
Explaining with reference to FIG. 1, the friction material composition for underlining material of the present invention has excellent friction performance while improving shear strength, crack resistance and abrasion resistance at ordinary temperature and high temperature, It can be used as the underlining
Specifically, the present invention provides an underlining material friction material composition of the present invention between an overlining material (friction material) 1, a
The friction member of the present invention is a friction member formed by using the underlining material of the present invention so that the upper surface becomes a friction surface, that is, the friction member in which the underlining material is located on the opposite side to the friction surface. It is. The friction member of the present invention is not limited to the above-described embodiment, and includes, for example, (1) an upper lining material (friction material) 1, a
前記裏金は、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を用いることができる。裏金としては、例えば、鉄、アルミ合金、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としては、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 back metal is usually used as a friction member to improve the mechanical strength of the friction member, and a metal or a fiber-reinforced plastic can be used as a material. Examples of the back metal include iron, aluminum alloy, stainless steel, inorganic fiber reinforced plastic, carbon fiber reinforced plastic, and the like. The primer layer and the adhesive layer may be any layers that are generally used for friction members such as brake shoes.
本発明の摩擦部材は、自動車等のディスクブレーキパッドの摩擦部材、自動車等のブレーキライニングの摩擦部材として使用することができる。また、上張り材用摩擦材組成物と本発明の下張り材用摩擦材組成物を目的形状に成形、加工、貼り付け等の工程を施すことにより、クラッチフェーシング、電磁ブレーキ、保持ブレーキ等の摩擦部材としても使用することができる。
本発明の摩擦部材は、その下張り材が、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を有するため、特に車用の摩擦部材として好適である。 INDUSTRIAL APPLICABILITY The friction member of the present invention can be used as a friction member for a disc brake pad of an automobile or the like and a friction member for a brake lining of an automobile or the like. Further, the friction material composition for an overlay material and the friction material composition for an underlay material of the present invention are subjected to molding, processing, pasting, and the like into a target shape, so that the friction of a clutch facing, an electromagnetic brake, a holding brake, etc. It can also be used as a member.
The friction member of the present invention has an excellent friction performance while the underlining material has good shear strength at normal and high temperatures, crack resistance and wear resistance, and is particularly suitable as a friction member for vehicles. is there.
本発明の摩擦部材は、その下張り材が、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を有するため、特に車用の摩擦部材として好適である。 INDUSTRIAL APPLICABILITY The friction member of the present invention can be used as a friction member for a disc brake pad of an automobile or the like and a friction member for a brake lining of an automobile or the like. Further, the friction material composition for an overlay material and the friction material composition for an underlay material of the present invention are subjected to molding, processing, pasting, and the like into a target shape, so that the friction of a clutch facing, an electromagnetic brake, a holding brake, etc. It can also be used as a member.
The friction member of the present invention has an excellent friction performance while the underlining material has good shear strength at normal and high temperatures, crack resistance and wear resistance, and is particularly suitable as a friction member for vehicles. is there.
［車］
本発明は、本発明の摩擦部材を搭載した車も提供する。例えば、本発明の摩擦部材を、ディスクブレーキパッド、ブレーキライニング、クラッチフェーシング、電磁ブレーキ、保持ブレーキ等に用いた車等が挙げられる。車としては、大型自動車、中型自動車、普通自動車、大型特殊自動車、小型特殊自動車、大型自動二輪車及び普通自動二輪車等の自動車が挙げられる。 [car]
The present invention also provides a vehicle equipped with the friction member of the present invention. For example, there is a car using the friction member of the present invention for a disc brake pad, a brake lining, a clutch facing, an electromagnetic brake, a holding brake, and the like. Examples of the car include large cars, medium cars, ordinary cars, large special cars, small special cars, large motorcycles and ordinary motorcycles.
本発明は、本発明の摩擦部材を搭載した車も提供する。例えば、本発明の摩擦部材を、ディスクブレーキパッド、ブレーキライニング、クラッチフェーシング、電磁ブレーキ、保持ブレーキ等に用いた車等が挙げられる。車としては、大型自動車、中型自動車、普通自動車、大型特殊自動車、小型特殊自動車、大型自動二輪車及び普通自動二輪車等の自動車が挙げられる。 [car]
The present invention also provides a vehicle equipped with the friction member of the present invention. For example, there is a car using the friction member of the present invention for a disc brake pad, a brake lining, a clutch facing, an electromagnetic brake, a holding brake, and the like. Examples of the car include large cars, medium cars, ordinary cars, large special cars, small special cars, large motorcycles and ordinary motorcycles.
以下、本発明を実施例によりさらに詳細に説明するが、本発明はこれらの例によって何ら制限を受けるものではない。
Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by these Examples.
実施例及び比較例の各摩擦材試料について、以下の評価方法に従って評価を行った。
［評価方法］
（１）せん断強度の測定
ＪＩＳ Ｄ４４２２（２００７年）に準拠して、常温（２５℃）及び高温（３００℃）におけるせん断強度を測定した。高温におけるせん断強度は、各例で作製したディスクブレーキパッドを３００℃で１時間加熱した後、１分間以内にせん断試験を行うことによって測定した。 Each of the friction material samples of Examples and Comparative Examples was evaluated according to the following evaluation method.
[Evaluation methods]
(1) Measurement of Shear Strength The shear strength at room temperature (25 ° C.) and high temperature (300 ° C.) was measured according to JIS D4422 (2007). The shear strength at high temperature was measured by heating the disc brake pad prepared in each example at 300 ° C. for 1 hour and then performing a shear test within 1 minute.
［評価方法］
（１）せん断強度の測定
ＪＩＳ Ｄ４４２２（２００７年）に準拠して、常温（２５℃）及び高温（３００℃）におけるせん断強度を測定した。高温におけるせん断強度は、各例で作製したディスクブレーキパッドを３００℃で１時間加熱した後、１分間以内にせん断試験を行うことによって測定した。 Each of the friction material samples of Examples and Comparative Examples was evaluated according to the following evaluation method.
[Evaluation methods]
(1) Measurement of Shear Strength The shear strength at room temperature (25 ° C.) and high temperature (300 ° C.) was measured according to JIS D4422 (2007). The shear strength at high temperature was measured by heating the disc brake pad prepared in each example at 300 ° C. for 1 hour and then performing a shear test within 1 minute.
（２）摩擦性能の評価
下張り材の摩擦性能は、各例で作製したディスクブレーキパッドを５０％研磨し、下張り材が摺動面に露出した状態で評価した。
（２－１）摩擦係数の測定
摩擦係数は、自動車技術会規格「ＪＡＳＯ Ｃ４０６」に基づいて測定し、第２効力試験における摩擦係数の平均値を算出した。摩擦係数が大きいほど、摩擦性能に優れることを示す。
（２－２）耐摩耗性の評価
自動車技術会規格「ＪＡＳＯ Ｃ４２７」に準拠して測定し、ブレーキディスク温度１００℃及び３００℃の制動１，０００回相当の摩擦材の摩耗量（単位：ｍｍ）を測定し、耐摩耗性の指標とした。摩耗量が少ないほど、摩擦性能に優れることを示す。 (2) Evaluation of friction performance The friction performance of the underlining material was evaluated in a state where the disc brake pad prepared in each example was polished by 50% and the underlining material was exposed on the sliding surface.
(2-1) Measurement of Friction Coefficient The friction coefficient was measured based on the Japan Society of Automotive Engineers Standard “JASO C406”, and the average value of the friction coefficient in the second efficacy test was calculated. The larger the coefficient of friction, the better the friction performance.
(2-2) Evaluation of abrasion resistance Abrasion resistance of a friction material equivalent to 1,000 times of braking at a brake disk temperature of 100 ° C. and 300 ° C. (unit: mm) ) Was measured and used as an index of wear resistance. The smaller the wear amount, the better the friction performance.
下張り材の摩擦性能は、各例で作製したディスクブレーキパッドを５０％研磨し、下張り材が摺動面に露出した状態で評価した。
（２－１）摩擦係数の測定
摩擦係数は、自動車技術会規格「ＪＡＳＯ Ｃ４０６」に基づいて測定し、第２効力試験における摩擦係数の平均値を算出した。摩擦係数が大きいほど、摩擦性能に優れることを示す。
（２－２）耐摩耗性の評価
自動車技術会規格「ＪＡＳＯ Ｃ４２７」に準拠して測定し、ブレーキディスク温度１００℃及び３００℃の制動１，０００回相当の摩擦材の摩耗量（単位：ｍｍ）を測定し、耐摩耗性の指標とした。摩耗量が少ないほど、摩擦性能に優れることを示す。 (2) Evaluation of friction performance The friction performance of the underlining material was evaluated in a state where the disc brake pad prepared in each example was polished by 50% and the underlining material was exposed on the sliding surface.
(2-1) Measurement of Friction Coefficient The friction coefficient was measured based on the Japan Society of Automotive Engineers Standard “JASO C406”, and the average value of the friction coefficient in the second efficacy test was calculated. The larger the coefficient of friction, the better the friction performance.
(2-2) Evaluation of abrasion resistance Abrasion resistance of a friction material equivalent to 1,000 times of braking at a brake disk temperature of 100 ° C. and 300 ° C. (unit: mm) ) Was measured and used as an index of wear resistance. The smaller the wear amount, the better the friction performance.
（３）耐クラック性の評価
自動車技術会規格「ＪＡＳＯ Ｃ４２７」に示されるブレーキディスク温度４００℃の制動（初速度５０ｋｍ／ｈ、終速度０ｋｍ／ｈ、減速度０．３Ｇ、制動前ブレーキディスク温度１００℃）を、摩擦材の厚みが半分になるまで繰り返し、摩擦材の摩擦面及び下張り材側の面におけるクラックの生成を測定し、下記評価基準に従って評価した。
Ａ：クラックが生成しなかった。
Ｂ：摩擦材の摩擦面又は下張り材側の面に０．１ｍｍのシックネスゲージが入らない程度のクラックが生成した。
Ｃ：摩擦材の摩擦面又は下張り材側の面に０．１ｍｍのシックネスゲージが入る程度のクラックが生成した。
なお、摩擦材の摩擦面及び下張り材側の面の一方にシックネスゲージが入らない程度のクラックが生成し、他方にシックネスゲージが入る程度のクラックが生成した場合、評価はＣとする。 (3) Evaluation of cracking resistance Braking at a brake disc temperature of 400 ° C. (initial speed 50 km / h, final speed 0 km / h, deceleration 0.3 G, brake disc temperature before braking specified in the Japan Society of Automotive Engineers Standard “JASO C427”) 100 ° C.) was repeated until the thickness of the friction material was reduced to half, and the generation of cracks on the friction surface of the friction material and the surface on the underlaying material side was measured and evaluated according to the following evaluation criteria.
A: No crack was generated.
B: Cracks were generated on the friction surface of the friction material or on the surface of the underlining material to such an extent that a thickness gauge of 0.1 mm did not fit.
C: Cracks were generated on the friction surface of the friction material or on the surface of the underlaying material to such an extent that a thickness gauge of 0.1 mm could enter.
When one of the friction surface of the friction material and the surface of the underlaying material has a crack that does not allow the thickness gauge to enter, and the other has a crack that allows the thickness gauge to enter, the evaluation is C.
自動車技術会規格「ＪＡＳＯ Ｃ４２７」に示されるブレーキディスク温度４００℃の制動（初速度５０ｋｍ／ｈ、終速度０ｋｍ／ｈ、減速度０．３Ｇ、制動前ブレーキディスク温度１００℃）を、摩擦材の厚みが半分になるまで繰り返し、摩擦材の摩擦面及び下張り材側の面におけるクラックの生成を測定し、下記評価基準に従って評価した。
Ａ：クラックが生成しなかった。
Ｂ：摩擦材の摩擦面又は下張り材側の面に０．１ｍｍのシックネスゲージが入らない程度のクラックが生成した。
Ｃ：摩擦材の摩擦面又は下張り材側の面に０．１ｍｍのシックネスゲージが入る程度のクラックが生成した。
なお、摩擦材の摩擦面及び下張り材側の面の一方にシックネスゲージが入らない程度のクラックが生成し、他方にシックネスゲージが入る程度のクラックが生成した場合、評価はＣとする。 (3) Evaluation of cracking resistance Braking at a brake disc temperature of 400 ° C. (initial speed 50 km / h, final speed 0 km / h, deceleration 0.3 G, brake disc temperature before braking specified in the Japan Society of Automotive Engineers Standard “JASO C427”) 100 ° C.) was repeated until the thickness of the friction material was reduced to half, and the generation of cracks on the friction surface of the friction material and the surface on the underlaying material side was measured and evaluated according to the following evaluation criteria.
A: No crack was generated.
B: Cracks were generated on the friction surface of the friction material or on the surface of the underlining material to such an extent that a thickness gauge of 0.1 mm did not fit.
C: Cracks were generated on the friction surface of the friction material or on the surface of the underlaying material to such an extent that a thickness gauge of 0.1 mm could enter.
When one of the friction surface of the friction material and the surface of the underlaying material has a crack that does not allow the thickness gauge to enter, and the other has a crack that allows the thickness gauge to enter, the evaluation is C.
［ディスクブレーキパッドの作製］
ディスクブレーキパッドの作製にあたり、下記の摩擦材組成物の成分を用意した。表１及び表２中に記載の各成分は、以下のものと同じである。
（結合材）
・フェノール樹脂
（有機充填材）
・カシューパーティクル
・タイヤトレッドゴムの粉砕粉
（無機充填材）
・チタン酸カリウム
・酸化ジルコニウム
・マイカ
・黒鉛
・硫化スズ
・硫酸バリウム
・水酸化カルシウム
（繊維基材）
・アラミド繊維（有機繊維）：フィブリル化アラミド繊維
（無機繊維）
・ガラス繊維：繊維長３，０００μｍ、繊維径１０μｍ、収束本数２００本
・繊維状ウォラストナイトＡ：平均繊維長１５０μｍ、平均繊維径１２μｍ、平均アスペクト比１３
・繊維状ウォラストナイトＢ：平均繊維長８２５μｍ、平均繊維径５５μｍ、平均アスペクト比１５
・鉱物繊維：平均繊維長２３０±５０μｍ
（下張り材用摩擦材組成物用の研削材）
・珪酸ジルコニウム：モース硬度７．５、平均粒子径１μｍ、不定形
・ムライト：モース硬度７．５、平均粒子径１５０μｍ、不定形
・α－アルミナ：モース硬度９、平均粒子径５μｍ、多角形状
・酸化ジルコニウム：モース硬度６（比較用）、平均粒子径４μｍ、不定形
・四酸化三鉄：モース硬度６（比較用）、平均粒子径０．６μｍ、球状
なお、上記モース硬度は、モース硬度計（株式会社東京サイエンス製）にて、標準物質とこすり合わせることで測定した。測定基準は、モース硬度を測定する際の一般的な測定基準に従った。 [Production of disc brake pad]
In producing the disc brake pad, the following components of the friction material composition were prepared. Each component described in Table 1 and Table 2 is the same as the following.
(Binder)
・ Phenolic resin (organic filler)
・ Cashew particles ・ Pulverized powder of tire tread rubber (inorganic filler)
-Potassium titanate-Zirconium oxide-Mica-Graphite-Tin sulfide-Barium sulfate-Calcium hydroxide (fiber base material)
・ Aramid fiber (organic fiber): Fibrillated aramid fiber (inorganic fiber)
・ Glass fiber: fiber length 3,000 μm, fiber diameter 10 μm, converging number 200 ・ Fibrous wollastonite A: average fiber length 150 μm, average fiber diameter 12 μm, average aspect ratio 13
Fibrous wollastonite B: average fiber length 825 μm, average fiber diameter 55 μm, average aspect ratio 15
・ Mineral fiber: average fiber length 230 ± 50 μm
(Abrasive material for friction material composition for underlay material)
・ Zirconium silicate: Mohs hardness 7.5,average particle diameter 1 μm, amorphous ・ Mullite: Mohs hardness 7.5, average particle diameter 150 μm, amorphous ・ α-alumina: Mohs hardness 9, average particle diameter 5 μm, polygonal shape Zirconium oxide: Mohs hardness 6 (for comparison), average particle diameter 4 μm, amorphous iron oxide trioxide: Mohs hardness 6 (for comparison), average particle diameter 0.6 μm, spherical. (Manufactured by Tokyo Science Co., Ltd.). The measurement standard followed the general measurement standard in measuring Mohs hardness.
ディスクブレーキパッドの作製にあたり、下記の摩擦材組成物の成分を用意した。表１及び表２中に記載の各成分は、以下のものと同じである。
（結合材）
・フェノール樹脂
（有機充填材）
・カシューパーティクル
・タイヤトレッドゴムの粉砕粉
（無機充填材）
・チタン酸カリウム
・酸化ジルコニウム
・マイカ
・黒鉛
・硫化スズ
・硫酸バリウム
・水酸化カルシウム
（繊維基材）
・アラミド繊維（有機繊維）：フィブリル化アラミド繊維
（無機繊維）
・ガラス繊維：繊維長３，０００μｍ、繊維径１０μｍ、収束本数２００本
・繊維状ウォラストナイトＡ：平均繊維長１５０μｍ、平均繊維径１２μｍ、平均アスペクト比１３
・繊維状ウォラストナイトＢ：平均繊維長８２５μｍ、平均繊維径５５μｍ、平均アスペクト比１５
・鉱物繊維：平均繊維長２３０±５０μｍ
（下張り材用摩擦材組成物用の研削材）
・珪酸ジルコニウム：モース硬度７．５、平均粒子径１μｍ、不定形
・ムライト：モース硬度７．５、平均粒子径１５０μｍ、不定形
・α－アルミナ：モース硬度９、平均粒子径５μｍ、多角形状
・酸化ジルコニウム：モース硬度６（比較用）、平均粒子径４μｍ、不定形
・四酸化三鉄：モース硬度６（比較用）、平均粒子径０．６μｍ、球状
なお、上記モース硬度は、モース硬度計（株式会社東京サイエンス製）にて、標準物質とこすり合わせることで測定した。測定基準は、モース硬度を測定する際の一般的な測定基準に従った。 [Production of disc brake pad]
In producing the disc brake pad, the following components of the friction material composition were prepared. Each component described in Table 1 and Table 2 is the same as the following.
(Binder)
・ Phenolic resin (organic filler)
・ Cashew particles ・ Pulverized powder of tire tread rubber (inorganic filler)
-Potassium titanate-Zirconium oxide-Mica-Graphite-Tin sulfide-Barium sulfate-Calcium hydroxide (fiber base material)
・ Aramid fiber (organic fiber): Fibrillated aramid fiber (inorganic fiber)
・ Glass fiber: fiber length 3,000 μm, fiber diameter 10 μm, converging number 200 ・ Fibrous wollastonite A: average fiber length 150 μm, average fiber diameter 12 μm, average aspect ratio 13
Fibrous wollastonite B: average fiber length 825 μm, average fiber diameter 55 μm, average aspect ratio 15
・ Mineral fiber: average fiber length 230 ± 50 μm
(Abrasive material for friction material composition for underlay material)
・ Zirconium silicate: Mohs hardness 7.5,
［実施例１～４及び比較例１～３］（ディスクブレーキパッドの作製）
表１に示す配合量に従って各成分を配合し、上張り材用摩擦材組成物を得た。また、表２に示す配合量に従って各成分を配合し、下張り材用摩擦材組成物を得た。
この上張り材用摩擦材組成物と下張り材用摩擦材組成物をそれぞれ別々に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、上張り材用混合物と下張り材用混合物を得た。得られた上張り材用混合物と下張り材用混合物を一体で成形プレス（王子機械株式会社製）にて予備成形した。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得たディスクブレーキパッドは、裏金の厚さ６ｍｍ、上張り材の厚さ５．５ｍｍ、下張り材の厚さ５．５ｍｍ、摩擦材投影面積５２ｃｍ２である。
得られたディスクブレーキパッドを用いて、前記方法に従って各測定及び評価を行った。結果を表２に示す。 [Examples 1 to 4 and Comparative Examples 1 to 3] (Production of disc brake pad)
Each component was blended according to the blending amounts shown in Table 1 to obtain a friction material composition for an upholstery material. Further, the respective components were blended in accordance with the blending amounts shown in Table 2 to obtain a friction material composition for an underlining material.
The friction material composition for the overlay material and the friction material composition for the underlay material are separately mixed with a Reidige mixer (manufactured by Matsubo Co., Ltd., trade name: Redige mixer M20), and the mixture for the overlay material is mixed with the mixture. A mixture for underlaying material was obtained. The obtained mixture for the overlay material and the mixture for the underlay material were integrally preformed by a molding press (manufactured by Oji Machine Co., Ltd.). Using a molding press (manufactured by Sanki Seiko Co., Ltd.) under conditions of a molding temperature of 140 to 160 ° C., a molding pressure of 30 MPa and a molding time of 5 minutes, an iron backing metal (manufactured by Hitachi Automotive Systems, Ltd.) Together with heat and pressure. The obtained molded article was heat-treated at 200 ° C. for 4.5 hours, polished using a rotary polisher, and scorched at 500 ° C. to obtain a disc brake pad. The disc brake pads obtained in Examples and Comparative Examples had a back metal thickness of 6 mm, an upper material of 5.5 mm, a lower material of 5.5 mm, and a friction material projected area of 52 cm 2 .
Using the obtained disc brake pads, each measurement and evaluation were performed according to the above-described methods. Table 2 shows the results.
表１に示す配合量に従って各成分を配合し、上張り材用摩擦材組成物を得た。また、表２に示す配合量に従って各成分を配合し、下張り材用摩擦材組成物を得た。
この上張り材用摩擦材組成物と下張り材用摩擦材組成物をそれぞれ別々に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、上張り材用混合物と下張り材用混合物を得た。得られた上張り材用混合物と下張り材用混合物を一体で成形プレス（王子機械株式会社製）にて予備成形した。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得たディスクブレーキパッドは、裏金の厚さ６ｍｍ、上張り材の厚さ５．５ｍｍ、下張り材の厚さ５．５ｍｍ、摩擦材投影面積５２ｃｍ２である。
得られたディスクブレーキパッドを用いて、前記方法に従って各測定及び評価を行った。結果を表２に示す。 [Examples 1 to 4 and Comparative Examples 1 to 3] (Production of disc brake pad)
Each component was blended according to the blending amounts shown in Table 1 to obtain a friction material composition for an upholstery material. Further, the respective components were blended in accordance with the blending amounts shown in Table 2 to obtain a friction material composition for an underlining material.
The friction material composition for the overlay material and the friction material composition for the underlay material are separately mixed with a Reidige mixer (manufactured by Matsubo Co., Ltd., trade name: Redige mixer M20), and the mixture for the overlay material is mixed with the mixture. A mixture for underlaying material was obtained. The obtained mixture for the overlay material and the mixture for the underlay material were integrally preformed by a molding press (manufactured by Oji Machine Co., Ltd.). Using a molding press (manufactured by Sanki Seiko Co., Ltd.) under conditions of a molding temperature of 140 to 160 ° C., a molding pressure of 30 MPa and a molding time of 5 minutes, an iron backing metal (manufactured by Hitachi Automotive Systems, Ltd.) Together with heat and pressure. The obtained molded article was heat-treated at 200 ° C. for 4.5 hours, polished using a rotary polisher, and scorched at 500 ° C. to obtain a disc brake pad. The disc brake pads obtained in Examples and Comparative Examples had a back metal thickness of 6 mm, an upper material of 5.5 mm, a lower material of 5.5 mm, and a friction material projected area of 52 cm 2 .
Using the obtained disc brake pads, each measurement and evaluation were performed according to the above-described methods. Table 2 shows the results.
実施例の下張り材用摩擦材組成物を用いた場合、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を発現した。なお、実施例の下張り材用摩擦材組成物は、銅及び鉄系金属（例えば、銅繊維、鉄繊維等）を含有しないため、環境有害性が低く、錆の抑制効果の高い摩擦材であるといえる。
一方、比較例の下張り材用摩擦材組成物を用いた場合、摩擦係数が大幅に低下し、優れた摩擦性能を得られなかった。 When the friction material composition for underlining material of the example was used, excellent friction performance was exhibited while improving the shear strength, crack resistance and wear resistance at ordinary temperature and high temperature. In addition, since the friction material composition for underlining materials of the examples does not contain copper and iron-based metals (for example, copper fiber, iron fiber, etc.), it is a friction material having low environmental harmfulness and high rust suppression effect. It can be said that.
On the other hand, when the friction material composition for underlining material of the comparative example was used, the friction coefficient was significantly reduced, and excellent friction performance could not be obtained.
一方、比較例の下張り材用摩擦材組成物を用いた場合、摩擦係数が大幅に低下し、優れた摩擦性能を得られなかった。 When the friction material composition for underlining material of the example was used, excellent friction performance was exhibited while improving the shear strength, crack resistance and wear resistance at ordinary temperature and high temperature. In addition, since the friction material composition for underlining materials of the examples does not contain copper and iron-based metals (for example, copper fiber, iron fiber, etc.), it is a friction material having low environmental harmfulness and high rust suppression effect. It can be said that.
On the other hand, when the friction material composition for underlining material of the comparative example was used, the friction coefficient was significantly reduced, and excellent friction performance could not be obtained.
本発明の下張り材用摩擦材組成物は、常温及び高温におけるせん断強度、耐クラック性及び耐摩耗性を良好なものとしながら、優れた摩擦性能を有するから、該下張り用摩擦材組成物は、乗用車用ブレーキパッド等の下張り材及び摩擦部材に好適である。
The friction material composition for underlining material of the present invention has excellent friction performance while improving the shear strength at ordinary temperature and high temperature, crack resistance and abrasion resistance. It is suitable for underlining materials and friction members such as brake pads for passenger cars.
１ 上張り材（摩擦材）
２ 下張り材
３ 裏金
４ シム
５ 摩擦部材 1 Overlay material (friction material)
2Underlay material 3 Back metal 4 Shim 5 Friction member
２ 下張り材
３ 裏金
４ シム
５ 摩擦部材 1 Overlay material (friction material)
2
Claims (19)
- 上張り材、下張り材及び裏金をこの順に有する摩擦部材であって、前記下張り材がモース硬度６．５以上の研削材を含有する摩擦部材。 (4) A friction member having an upper material, a lower material, and a backing metal in this order, wherein the lower material contains a grinding material having a Mohs hardness of 6.5 or more.
- 前記下張り材における前記モース硬度６．５以上の研削材の含有量が０．１～８．５質量％である、請求項１に記載の摩擦部材。 The friction member according to claim 1, wherein the content of the abrasive having the Mohs hardness of 6.5 or more in the underlaying material is 0.1 to 8.5% by mass.
- 前記研削材の平均粒子径が０．５～２５０μｍである、請求項１又は２に記載の摩擦部材。 The friction member according to claim 1, wherein the abrasive has an average particle size of 0.5 to 250 μm.
- 前記研削材が、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド及び金剛砂からなる群から選択される少なくとも１種である、請求項１～３のいずれか１項に記載の摩擦部材。 4. The abrasive according to claim 1, wherein the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and gold sand. The friction member according to claim 1.
- 前記下張り材が、さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する、請求項１～４のいずれか１項に記載の摩擦部材。 The friction member according to any one of claims 1 to 4, wherein the underlaying material further contains at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder.
- 前記下張り材が、さらにガラス繊維を含有する、請求項１～５のいずれか１項に記載の摩擦部材。 (6) The friction member according to any one of (1) to (5), wherein the underlining material further contains glass fibers.
- 銅を含有しないか、又は含有していても銅の含有量は銅元素として０．５質量％未満である、請求項１～６のいずれか１項に記載の摩擦部材。 The friction member according to any one of claims 1 to 6, wherein no copper is contained, or even if copper is contained, the content of copper is less than 0.5% by mass as a copper element.
- ディスクブレーキパッド用又はドラムブレーキライニング用である、請求項１～７のいずれか１項に記載の摩擦部材。 The friction member according to any one of claims 1 to 7, which is used for a disc brake pad or a drum brake lining.
- 請求項１～８のいずれか１項に記載の摩擦部材を搭載した車。 A vehicle equipped with the friction member according to any one of claims 1 to 8.
- モース硬度６．５以上の研削材を含有する摩擦材組成物。 (4) A friction material composition containing an abrasive having a Mohs hardness of 6.5 or more.
- 前記研削材の平均粒子径が０．５～２５０μｍである、請求項１０に記載の摩擦材組成物。 11. The friction material composition according to claim 10, wherein the abrasive has an average particle size of 0.5 to 250 μm.
- 前記研削材が、二酸化クロム、三酸化クロム、ガーネット、二酸化珪素、珪酸ジルコニウム、ムライト、α－アルミナ、シリコンカーバイド及び金剛砂からなる群から選択される少なくとも１種である、請求項１０又は１１に記載の摩擦材組成物。 12. The abrasive according to claim 10 or 11, wherein the abrasive is at least one selected from the group consisting of chromium dioxide, chromium trioxide, garnet, silicon dioxide, zirconium silicate, mullite, α-alumina, silicon carbide, and gold sand. Friction material composition.
- さらに有機充填材、無機充填材、繊維基材及び結合材からなる群から選択される少なくとも１種を含有する、請求項１０～１２のいずれか１項に記載の摩擦材組成物。 The friction material composition according to any one of claims 10 to 12, further comprising at least one selected from the group consisting of an organic filler, an inorganic filler, a fiber base material, and a binder.
- さらにガラス繊維を含有する、請求項１０～１３のいずれか１項に記載の摩擦材組成物。 The friction material composition according to any one of claims 10 to 13, further comprising glass fibers.
- 銅を含有しないか、又は含有していても銅の含有量は銅元素として０．５質量％未満である、請求項１０～１４のいずれか１項に記載の摩擦材組成物。 The friction material composition according to any one of claims 10 to 14, wherein the friction material composition does not contain copper, or even if copper is contained, the content of copper is less than 0.5% by mass as a copper element.
- ディスクブレーキパッド用又はドラムブレーキライニング用である、請求項１０～１５のいずれか１項に記載の摩擦材組成物。 The friction material composition according to any one of claims 10 to 15, which is used for a disc brake pad or a drum brake lining.
- 請求項１０～１６のいずれか１項に記載の摩擦材組成物からなる下張り材用摩擦材組成物。 A friction material composition for an underlining material, comprising the friction material composition according to any one of claims 10 to 16.
- 請求項１７に記載の下張り材用摩擦材組成物を成形してなる下張り材。 An underlining material obtained by molding the friction material composition for an underlining material according to claim 17.
- 請求項１８に記載の下張り材を搭載した車。 A vehicle equipped with the underlining material according to claim 18.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/034374 WO2020059005A1 (en) | 2018-09-18 | 2018-09-18 | Friction material, friction material composition, friction material composition for lower-layer material, lower-layer material, and vehicle |
| JP2020547487A JPWO2020059005A1 (en) | 2018-09-18 | 2018-09-18 | Friction member, friction material composition, friction material composition for underlaying material, underlaying material and car |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/034374 WO2020059005A1 (en) | 2018-09-18 | 2018-09-18 | Friction material, friction material composition, friction material composition for lower-layer material, lower-layer material, and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2020059005A1 true WO2020059005A1 (en) | 2020-03-26 |
Family
ID=69886744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/034374 WO2020059005A1 (en) | 2018-09-18 | 2018-09-18 | Friction material, friction material composition, friction material composition for lower-layer material, lower-layer material, and vehicle |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPWO2020059005A1 (en) |
| WO (1) | WO2020059005A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61136027A (en) * | 1984-12-06 | 1986-06-23 | Hitachi Chem Co Ltd | Granular composition for friction material |
| JPH10205556A (en) * | 1997-01-24 | 1998-08-04 | Hitachi Chem Co Ltd | Friction material |
| JP2001311071A (en) * | 2000-04-26 | 2001-11-09 | Nisshinbo Ind Inc | Non-asbestos friction material |
| JP2005024005A (en) * | 2003-07-02 | 2005-01-27 | Nisshinbo Ind Inc | Friction material |
| JP2014122314A (en) * | 2012-12-21 | 2014-07-03 | Akebono Brake Ind Co Ltd | Friction material |
| JP2016079246A (en) * | 2014-10-14 | 2016-05-16 | 日本ブレーキ工業株式会社 | Friction material composition, friction material, and friction member |
| JP2018131479A (en) * | 2017-02-13 | 2018-08-23 | 日立化成株式会社 | Friction material composition, friction material using friction material composition, and friction member |
-
2018
- 2018-09-18 WO PCT/JP2018/034374 patent/WO2020059005A1/en active Application Filing
- 2018-09-18 JP JP2020547487A patent/JPWO2020059005A1/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61136027A (en) * | 1984-12-06 | 1986-06-23 | Hitachi Chem Co Ltd | Granular composition for friction material |
| JPH10205556A (en) * | 1997-01-24 | 1998-08-04 | Hitachi Chem Co Ltd | Friction material |
| JP2001311071A (en) * | 2000-04-26 | 2001-11-09 | Nisshinbo Ind Inc | Non-asbestos friction material |
| JP2005024005A (en) * | 2003-07-02 | 2005-01-27 | Nisshinbo Ind Inc | Friction material |
| JP2014122314A (en) * | 2012-12-21 | 2014-07-03 | Akebono Brake Ind Co Ltd | Friction material |
| JP2016079246A (en) * | 2014-10-14 | 2016-05-16 | 日本ブレーキ工業株式会社 | Friction material composition, friction material, and friction member |
| JP2018131479A (en) * | 2017-02-13 | 2018-08-23 | 日立化成株式会社 | Friction material composition, friction material using friction material composition, and friction member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2020059005A1 (en) | 2021-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5051330B2 (en) | Non-asbestos friction material composition, friction material and friction member using the same | |
| JP5071604B2 (en) | Non-asbestos friction material composition, friction material and friction member using the same | |
| JP6977778B2 (en) | Friction member, friction material composition for underlayment material and friction material | |
| JP6481775B2 (en) | Friction material composition, friction material and friction member | |
| WO2012066963A1 (en) | Non-asbestos friction material composition, and friction material and friction member using same | |
| JP5790175B2 (en) | Non-asbestos friction material composition | |
| WO2012066967A1 (en) | Non-asbestos friction material composition, friction material using same, and friction member | |
| JP5987539B2 (en) | Friction material composition, friction material and friction member using the same | |
| JP5263454B2 (en) | Non-asbestos friction material composition, friction material and friction member using the same | |
| JPWO2019074012A1 (en) | Friction material composition, friction material and friction member using friction material composition | |
| JP7240424B2 (en) | Friction material composition, friction material and friction member | |
| US20200063813A1 (en) | Friction member, friction material composition, friction material, and vehicle | |
| WO2019151390A1 (en) | Friction material, friction material composition, friction member, and vehicle | |
| WO2020255279A1 (en) | Friction member, friction material composition, friction material, and vehicle | |
| JP7184094B2 (en) | Friction member, friction material composition for underlay material, and underlay material | |
| WO2020059005A1 (en) | Friction material, friction material composition, friction material composition for lower-layer material, lower-layer material, and vehicle | |
| JP2020158568A (en) | Friction member, friction material composition, friction material and automobile | |
| JP2021152119A (en) | Friction member, friction material composition, friction material and vehicle | |
| JP7464039B2 (en) | Friction member, friction material composition, friction material and vehicle | |
| WO2020044455A1 (en) | Friction member, friction material composition, friction material, and wheel | |
| JP2020051438A (en) | Friction member, friction material composition, friction material and vehicle | |
| JP2020158567A (en) | Friction member, friction material composition, friction material and automobile | |
| WO2019150501A1 (en) | Friction material, friction material composition and friction member | |
| JPWO2020065721A1 (en) | Friction member, friction material composition and friction material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18934454 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2020547487 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18934454 Country of ref document: EP Kind code of ref document: A1 |