JP7467465B2 - 摩擦材組成物、摩擦材及びディスクブレーキパッド - Google Patents
摩擦材組成物、摩擦材及びディスクブレーキパッド Download PDFInfo
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- JP7467465B2 JP7467465B2 JP2021532694A JP2021532694A JP7467465B2 JP 7467465 B2 JP7467465 B2 JP 7467465B2 JP 2021532694 A JP2021532694 A JP 2021532694A JP 2021532694 A JP2021532694 A JP 2021532694A JP 7467465 B2 JP7467465 B2 JP 7467465B2
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- 239000002783 friction material Substances 0.000 title claims description 141
- 239000000203 mixture Substances 0.000 title claims description 56
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 64
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 23
- OBTSLRFPKIKXSZ-UHFFFAOYSA-N lithium potassium Chemical compound [Li].[K] OBTSLRFPKIKXSZ-UHFFFAOYSA-N 0.000 claims description 17
- 239000011256 inorganic filler Substances 0.000 claims description 16
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 16
- 239000000835 fiber Substances 0.000 claims description 11
- 239000012766 organic filler Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000002243 precursor Substances 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 description 42
- 230000000052 comparative effect Effects 0.000 description 30
- 229920002313 fluoropolymer Polymers 0.000 description 24
- 239000004811 fluoropolymer Substances 0.000 description 24
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 18
- 238000000034 method Methods 0.000 description 14
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 239000011591 potassium Substances 0.000 description 11
- 229910052700 potassium Inorganic materials 0.000 description 11
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 10
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 9
- 239000011737 fluorine Substances 0.000 description 9
- 229910052731 fluorine Inorganic materials 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- 238000000465 moulding Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 229920001568 phenolic resin Polymers 0.000 description 6
- 239000005011 phenolic resin Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000003607 modifier Substances 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 244000226021 Anacardium occidentale Species 0.000 description 3
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000004760 aramid Substances 0.000 description 3
- 229920006231 aramid fiber Polymers 0.000 description 3
- 235000020226 cashew nut Nutrition 0.000 description 3
- 238000000354 decomposition reaction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229920002379 silicone rubber Polymers 0.000 description 3
- 239000004945 silicone rubber Substances 0.000 description 3
- 238000003856 thermoforming Methods 0.000 description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 229920000800 acrylic rubber Polymers 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920002748 Basalt fiber Polymers 0.000 description 1
- 235000019492 Cashew oil Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 241000357293 Leptobrama muelleri Species 0.000 description 1
- 239000004113 Sepiolite Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 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
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229940059459 cashew oil Drugs 0.000 description 1
- 239000010467 cashew oil Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- SWHAQEYMVUEVNF-UHFFFAOYSA-N magnesium potassium Chemical compound [Mg].[K] SWHAQEYMVUEVNF-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 229910052628 phlogopite Inorganic materials 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229910052624 sepiolite Inorganic materials 0.000 description 1
- 235000019355 sepiolite Nutrition 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920001187 thermosetting polymer 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
- ITRNXVSDJBHYNJ-UHFFFAOYSA-N tungsten disulfide Chemical compound S=[W]=S ITRNXVSDJBHYNJ-UHFFFAOYSA-N 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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
- C09K3/149—Antislip compositions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
- F16D69/025—Compositions based on an organic binder
- F16D69/026—Compositions based on an organic binder containing fibres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/6303—Inorganic additives
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
- C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B35/63436—Halogen-containing polymers, e.g. PVC
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00362—Friction materials, e.g. used as brake linings, anti-skid materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/442—Carbonates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/963—Surface properties, e.g. surface roughness
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Description
結合材、繊維基材、無機充填材、有機充填材を含有し、銅成分を実質的に含有しないNAO材の摩擦材組成物において、
ブレーキ制動時に焼結体となる物質であってディスクローターから生じる粉体を保持する当該焼結体の前駆体である第1物質と、
前記第1物質の焼結を助ける焼結助剤である第2物質と、
を含む。
(2)結合材は、ストレートフェノール樹脂、カシューオイル変性フェノール樹脂、アクリルゴム変性フェノール樹脂、シリコーンゴム変性フェノール樹脂、ニトリルゴム(NBR)変性フェノール樹脂、フェノール・アラルキル樹脂(アラルキル変性フェノール樹脂)、フルオロポリマー分散フェノール樹脂、シリコーンゴム分散フェノール樹脂等のフェノール樹脂系の熱硬化性樹脂を、単独で又は2種類以上を組み合わせて用いることができる。
(3)結合材の含有量は摩擦材組成物全量に対して8重量%~13重量%とするのが好ましく、9重量%~12重量%とするのがより好ましい。
(2)繊維基材は、アラミド繊維、セルロース繊維、ポリ-パラフェニレンベンゾビスオキサゾール繊維、アクリル繊維等の摩擦材に通常用いられる有機繊維、アルミニウム繊維、アルミニウム合金繊維、亜鉛繊維等の摩擦材に通常用いられる金属繊維が挙げられ、これらは1種を単独で又は2種以上を組み合わせて使用することができる。
(3)繊維基材の含有量は、摩擦材組成物全量に対して2重量%~10重量%とするのが好ましく、4重量%~8重量%とするのがより好ましい。
(2)無機充填材は、上記の炭酸カルシウム、チタン酸リチウムカリウム以外に、
硫化亜鉛、二硫化モリブデン、硫化スズ、硫化ビスマス、硫化タングステン、複合金属硫化物等の金属硫化物系潤滑材、又は、人造黒鉛、天然黒鉛、薄片状黒鉛、弾性黒鉛化カーボン、石油コークス、活性炭、酸化ポリアクリロニトリル繊維粉砕粉等の炭素質系潤滑材等の摩擦材に通常用いられる潤滑材や、タルク、クレイ、ドロマイト、水酸化カルシウム、硫酸バリウム、金雲母、白雲母、バーミキュライト、四三酸化鉄、ケイ酸カルシウム水和物、ガラスビーズ、ゼオライト、ムライト、クロマイト、酸化チタン、酸化マグネシウム、安定化酸化ジルコニウム、単斜晶酸化ジルコニウム、ケイ酸ジルコニウム、γ-アルミナ、α-アルミナ、炭化ケイ素、鉄粒子、亜鉛粒子、スズ粒子、非ウィスカー状(板状、柱状、鱗片状、複数の凸部を有する不定形状)のチタン酸塩(6チタン酸カリウム、8チタン酸カリウム、チタン酸マグネシウムカリウム)等の摩擦材に通常用いられる粒子状無機摩擦調整材や、ウォラストナイト、セピオライト、バサルト繊維、ガラス繊維、生体溶解性人造鉱物繊維、ロックウール等の摩擦材に通常用いられる繊維状無機摩擦調整材が挙げられ、これらは1種を単独で又は2種以上を組み合わせて使用することができる。
(3)無機充填材は、上記の炭酸カルシウム、チタン酸リチウムカリウムと合わせて、摩擦材組成物全量に対して50重量%~85重量%とするのが好ましく、60重量%~80重量%とするのがより好ましい。
(2)有機充填材は、上記のフッ素系ポリマー以外に、カシューダスト、タイヤトレッドゴムの粉砕粉や、ニトリルゴム、アクリルゴム、シリコーンゴム、ブチルゴム等の加硫ゴム粉末又は未加硫ゴム粉末等の摩擦材に通常使用される有機摩擦調整材が挙げられ、これらは1種を単独で又は2種以上を組み合わせて用いることができる。
(3)有機充填材の含有量は、上記フッ素系ポリマーと合わせて、摩擦材組成物全量に対して3重量%~12重量%とすることが好ましく、5重量%~10重量%とすることがより好ましい。
[実施例1~実施例14・比較例1~比較例4の摩擦材の製造方法]
表1、表2に示す組成の摩擦材組成物をレディゲミキサーにて5分間混合し、成型金型内で30MPaにて10秒間加圧して予備成型をした。この予備成型物を、予め洗浄、表面処理、接着材を塗布した鋼鉄製のバックプレート上に重ね、熱成型型内で成型温度150℃、成型圧力40MPaの条件下で10分間成型した後、200℃で5時間熱処理(後硬化)を行い、研磨して摩擦面を形成し、乗用車用ディスクブレーキパッドを作製した(実施例1~実施例14、比較例1~比較例4)。
5回の平均摩擦係数μが、0.42以上0.46未満に該当する場合は「優」、
0.38以上0.42未満に該当する場合は「良」、
0.34以上0.38未満に該当する場合は「可」、
0.34未満に該当する場合は「不可」という基準とした。
0.20以上に該当する場合は「優」、
0.20未満0.15以上に該当する場合は「良」、
0.15未満0.10以上に該当する場合は「可」、
0.10未満に該当する場合は「不可」という基準とした。
Claims (4)
- 結合材、繊維基材、無機充填材、有機充填材を含有し、銅成分を実質的に含有しないNAO材の摩擦材組成物において、
ブレーキ制動時に焼結体となる物質であってディスクローターから生じる粉体を保持する当該焼結体の前駆体である第1物質と、
前記第1物質の焼結を助ける焼結助剤である第2物質と、
を含み、
前記第1物質は、無機充填材である炭酸カルシウムであり、摩擦材組成物全量に対し5重量%~20重量%含有され、
前記第2物質は、有機充填材であるポリテトラフルオロエチレン(PTFE)の粉末であり、摩擦材組成物全量に対し1重量%~5重量%含有される、摩擦材組成物。 - さらに、無機充填材であるチタン酸リチウムカリウムが摩擦材組成物全量に対し10重量%~35重量%含有される、請求項1記載の摩擦材組成物。
- 請求項1乃至請求項2に記載の摩擦材組成物を用いて製造される摩擦材。
- 請求項3記載の摩擦材をバックプレート上に載置してなるディスクブレーキパッド。
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