WO2017183618A1 - 非石綿系摩擦材 - Google Patents

非石綿系摩擦材 Download PDF

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Publication number
WO2017183618A1
WO2017183618A1 PCT/JP2017/015513 JP2017015513W WO2017183618A1 WO 2017183618 A1 WO2017183618 A1 WO 2017183618A1 JP 2017015513 W JP2017015513 W JP 2017015513W WO 2017183618 A1 WO2017183618 A1 WO 2017183618A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction material
friction
iron
value
asbestos
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2017/015513
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
敬治 小島
小林　雅明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Advics Co Ltd
Original Assignee
Advics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Advics Co Ltd filed Critical Advics Co Ltd
Priority to US16/094,064 priority Critical patent/US20190128354A1/en
Priority to CN201780024345.2A priority patent/CN109072046A/zh
Publication of WO2017183618A1 publication Critical patent/WO2017183618A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • F16D69/025—Compositions based on an organic binder
    • F16D69/026—Compositions based on an organic binder containing fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
    • F16D69/02—Composition of linings ; Methods of manufacturing
    • F16D69/027—Compositions based on metals or inorganic oxides
    • F16D69/028—Compositions based on metals or inorganic oxides containing fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0034—Materials; Production methods therefor non-metallic
    • F16D2200/0039—Ceramics
    • F16D2200/0043—Ceramic base, e.g. metal oxides or ceramic binder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/0034—Materials; Production methods therefor non-metallic
    • F16D2200/0052—Carbon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2200/00—Materials; Production methods therefor
    • F16D2200/006—Materials; Production methods therefor containing fibres or particles
    • F16D2200/0065—Inorganic, e.g. non-asbestos mineral fibres

Definitions

  • the present invention relates to, for example, a non-asbestos-based friction material used for a disc brake for a vehicle or the like.
  • An object of the present invention is to provide a non-asbestos-based friction material capable of securing a stable high friction coefficient while suppressing a decrease in wear resistance even at high speed and high load braking while suppressing the content of a copper component. It is.
  • the invention according to claim 1 is a non-asbestos-based friction material including a fiber base, a binder, a lubricant, and an organic / inorganic filler, wherein the entire friction material composition of the copper component While the compounding ratio with respect to (5) is 5 weight% or less, both iron and iron-type alloys as a metal simple substance are made non-containing. Then, a carbon material having a d value of 0.336 to 0.342 nm in the (002) plane in X-ray diffraction is blended as a lubricant at 2 to 6% by weight with respect to the entire friction material composition.
  • the d value of the (002) plane in X-ray diffraction is related to the degree of graphitization in the carbon material.
  • a suitable lubricating action can be obtained even at high speed and high load braking.
  • carbon materials are less likely to cause wear of a counterpart member (such as a rotor), and furthermore, non-uniform wear such as adhesion friction between irons does not occur. Therefore, it is possible to secure a stable high friction coefficient while suppressing the decrease in wear resistance.
  • the non-asbestos-based friction material of the present embodiment comprises a fibrous base material, a binder, an organic filler, an inorganic filler, and a lubricant.
  • the material used as the fiber base examples include organic fibers such as aramid fibers, cellulose fibers and acrylic fibers, and inorganic fibers such as glass fibers, rock wool, ceramic fibers and wollastonite. These may be used alone or in combination of two or more. Particularly preferred are aramid fibers and rock wool. Although the blending amount of the fiber base is not particularly limited, it may be added so as to be about 3 to 20% by weight with respect to the entire friction material composition.
  • the binding material has a role of binding the respective components of the friction material, and known materials can be used.
  • thermosetting resins such as a phenol resin, a melamine resin, an epoxy resin, and those modified products etc. are illustrated. These may be used alone or in combination of two or more. Particularly preferred is a phenolic resin.
  • the compounding amount of the binder is not particularly limited, it may be added so as to be about 6 to 16% by weight with respect to the entire friction material composition.
  • the organic filler, the inorganic filler, and the lubricant have a role of adjusting the friction performance such as the friction coefficient and the wear of the friction material.
  • the organic filler include cashew dust and rubber powder.
  • the inorganic filler include potassium titanate, calcium hydroxide, calcium carbonate, calcium silicate, barium sulfate, iron oxide, zirconium silicate, zirconium oxide, magnesium oxide and the like.
  • the tin sulfide and the carbon material (carbon-type material) mentioned later can be mentioned, for example.
  • none of the metals such as copper and iron and their respective alloys are contained. Copper may be contained in an amount of 5% by weight or less based on the entire friction material composition to ensure lubricity in a high temperature environment.
  • braking performance at the time of high speed and high load braking for example, heat resistant wear resistance and stable high friction coefficient under high temperature environment are required.
  • the content of the copper component which is said to be advantageous for securing the braking performance at the time of high speed and high load braking tends to be regulated to a certain level or less in consideration of the environment.
  • a material such as expanded graphite which is made of graphite having a d value of (002) plane in the range of 0.336 to 0.342 nm is employed as the above-mentioned carbon material.
  • the d value indicates the distance between (002) planes, and is related to the graphitization degree. Converting this into Franklin's p value corresponds to 5.994 to 73.586%. If these d and p values are too high, the lubricating action will be excessive, leading to a lack of braking performance (efficacy (friction coefficient)), and conversely if too low, the wear of the friction material will increase, ie the wear resistance will decrease. It connects.
  • the inventors of the present invention have found a d value and a compounding amount of a carbon material which make them compatible.
  • the more preferable value of the upper limit of d value is 0.341 nm.
  • a more preferable value of the blending amount of the carbon material is 2 to 4% by weight.
  • neither iron nor iron-based alloy as a single metal is contained.
  • it does not contain iron sulfide which easily generates iron by thermal decomposition.
  • a disc rotor made of an iron-based material is used as a mating material of the friction material, and the carbon material in the friction material is less likely to wear the mating material compared to iron, and further aggregation of iron It is also difficult to cause uneven wear due to friction.
  • a thermally expanded carbon material such as the above-described expanded graphite is used.
  • the crystallites are randomly oriented, so that the friction between the crystallite end faces is less likely to cause excessive lubrication.
  • a method for thermal expansion for example, a method of intercalating graphite with an expansive substance consisting of an acid such as sulfuric acid or a process of graphitizing a specific coke, the graphite in a state of thermal expansion in the intermediate process There is a method to stop the process at the stage of
  • the size La of the crystallite in the a-axis direction and the size Lc of the crystallite in the c-axis direction in the X-ray diffraction of the carbon material are each 50 to 80 nm. If the values of La and Lc are too large, randomness in the orientation of the crystallites will be difficult to obtain, which may lead to insufficient braking performance. On the other hand, if too small, lubricity will become excessive. At times, this may lead to a decrease in the coefficient of friction. By adopting the above values, such inconvenience can be prevented. That is, the randomness of the crystallites is improved, and it becomes easier to secure a stable high friction coefficient. More preferable values of La and Lc are 50 to 70 nm.
  • the friction material of the present invention can be applied, for example, to a disc brake pad for a vehicle or the like. Further, the present invention is not limited to this, and can be applied to, for example, a conventionally known friction material such as a brake shoe for a drum brake.
  • the friction material raw materials were blended according to the blending amounts shown in FIG. 1, and the friction material compositions of Examples 1 to 8 and Comparative Examples 1 to 5 were obtained. Then, this was mixed, pressurized and heated as described above, and cured.
  • surface is weight% with respect to the whole friction material composition.
  • a plurality of predetermined deceleration patterns are provided for the deceleration of 150 km / h to 50 km / h, the deceleration of 200 km / h to 65 km / h, and the deceleration of 250 km / h to 80 km / h.
  • the brake fluid pressure (pressure for pressing the pad against the rotor) value of And the wear amount of the pad was measured after the series of measurements.
  • the average friction coefficient (efficacy) of high speed and high load braking is shown in FIG. 1 for each deceleration pattern when the braking fluid pressure value is 6 MPa and 10 MPa.
  • the friction material composition is a carbon material which does not contain iron or iron-based alloy as a single metal and which has ad value of (002) plane in X-ray diffraction of 0.336 to 0.342 nm as a lubricant. It was found that by blending 2 to 6% by weight with respect to the entire object, it is possible to obtain a friction material excellent in average coefficient of friction (efficacy) and wear amount both before and after the above-mentioned fade and at high speed and high load braking.
  • a more preferable upper limit of the d value of the (002) plane is 0.341 nm (see Examples 1 to 5). Further, a more preferable value of the blending amount of the above-mentioned carbon material is 2 to 4% by weight (see Examples 1 to 7). By setting these more preferable values, the effects of the present invention can be made more preferable.
  • the friction material of the present invention can be applied to a pad that requires a conventionally known friction material, such as a pad for a disk brake of a vehicle or the like, a brake shoe, and the like.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Braking Arrangements (AREA)
PCT/JP2017/015513 2016-04-20 2017-04-18 非石綿系摩擦材 Ceased WO2017183618A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/094,064 US20190128354A1 (en) 2016-04-20 2017-04-18 Non-asbestos friction material
CN201780024345.2A CN109072046A (zh) 2016-04-20 2017-04-18 非石棉系摩擦材料

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016084647A JP6756144B2 (ja) 2016-04-20 2016-04-20 非石綿系摩擦材
JP2016-084647 2016-04-20

Publications (1)

Publication Number Publication Date
WO2017183618A1 true WO2017183618A1 (ja) 2017-10-26

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PCT/JP2017/015513 Ceased WO2017183618A1 (ja) 2016-04-20 2017-04-18 非石綿系摩擦材

Country Status (4)

Country Link
US (1) US20190128354A1 (enExample)
JP (1) JP6756144B2 (enExample)
CN (1) CN109072046A (enExample)
WO (1) WO2017183618A1 (enExample)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209635A (ja) * 1989-02-03 1990-08-21 Aisin Chem Co Ltd ブレーキ用摩擦材
WO2012066966A1 (ja) * 2010-11-19 2012-05-24 日立化成工業株式会社 ノンアスベスト摩擦材組成物、これを用いた摩擦材及び摩擦部材
JP2015093934A (ja) * 2013-11-12 2015-05-18 曙ブレーキ工業株式会社 摩擦材組成物および摩擦材
JP2015121266A (ja) * 2013-12-24 2015-07-02 日清紡ブレーキ株式会社 摩擦材
WO2016017488A1 (ja) * 2014-08-01 2016-02-04 日清紡ブレーキ株式会社 摩擦材

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02209635A (ja) * 1989-02-03 1990-08-21 Aisin Chem Co Ltd ブレーキ用摩擦材
WO2012066966A1 (ja) * 2010-11-19 2012-05-24 日立化成工業株式会社 ノンアスベスト摩擦材組成物、これを用いた摩擦材及び摩擦部材
JP2015093934A (ja) * 2013-11-12 2015-05-18 曙ブレーキ工業株式会社 摩擦材組成物および摩擦材
JP2015121266A (ja) * 2013-12-24 2015-07-02 日清紡ブレーキ株式会社 摩擦材
WO2016017488A1 (ja) * 2014-08-01 2016-02-04 日清紡ブレーキ株式会社 摩擦材

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TANIGUCHI, KEISUKE ET AL.: "Brake Masatsuzai no Masatsu Mamo Tokusei ni Ataeru Kokuenkado no Eikyo", PROCEEDINGS OF JAST TRIBOLOGY CONFERENCE, 2014, pages 76 - 77 *

Also Published As

Publication number Publication date
US20190128354A1 (en) 2019-05-02
CN109072046A (zh) 2018-12-21
JP2017193632A (ja) 2017-10-26
JP6756144B2 (ja) 2020-09-16

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